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Comerica

cma · NYSE Financial Services
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Ticker cma
Exchange NYSE
Sector Financial Services
Industry Banks - Regional
Employees 5001-10,000
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FY2016 Annual Report · Comerica
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Comerica Incorporated

2016 Annual Report

Our Core Values

Customer-centricity

Collaboration

Integrity

Excellence

Agility

Diversity

Involvement

Comerica Incorporated (NYSE: CMA) is a financial services company headquartered in Dallas, Texas, and 

strategically aligned by three business segments: The Business Bank, The Retail Bank, and Wealth Management. 

Comerica focuses on relationships, and helping people and businesses be successful. In addition to Texas, 

Comerica Bank locations can be found in Arizona, California, Florida and Michigan, with select businesses 

operating in several other states, as well as in Canada and Mexico. 

To Our Shareholders

Ralph W. Babb Jr.
Chairman and Chief Executive Officer

We have taken significant steps to transform our company for the better. As a result of the hard work of our entire 
team, an action-oriented improvement plan and a sharp focus on results, we emerged from 2016 a stronger and 
more confident organization, well positioned for the road ahead. This was positively reflected in our stock’s 
performance and increased profitability as we moved through the year.

As always, we are committed to providing exceptional experiences for our customers and serving as their trusted 
advisor, while diligently working to reduce costs and drive efficiencies. Although we have consistently posted 
superior average loans and deposits per employee relative to our peers, we recognized that we needed to do more 
to improve returns and enhance shareholder value. As a result, in July 2016, we announced a transformational, 
enterprise-wide initiative to help grow efficiency and revenues, which we call GEAR Up.

Today, GEAR Up is already making a substantial contribution to our bottom line. Through GEAR Up, we identified 
and began in earnest executing on more than 20 work streams. As promised, we achieved more than $25 million 
in expense savings in 2016.  In total, by the end of 2018, we expect to drive at least $270 million in additional pre-
tax income, relative to when we began the program.

Expanded product offerings, enhanced sales tools and training and better customer analytics are expected to 
increase customer penetration of our products. We’ve also streamlined leadership across our organization to 
support speed and simplicity of getting business done, which has resulted in renewed vigor and focus for our 
colleagues.

We’ve taken a multifaceted approach to cutting costs, including reducing our workforce by approximately nine 
percent, redesigning our retirement program, optimizing real estate, streamlining operational processes, 
selectively outsourcing technology functions and reducing technology system applications.

Workforce reductions included the elimination of about 30 percent of our management positions in order to get 
closer to our customers and accelerate decision making, while ensuring we maintain our high standards for 
customer service and deep expertise and experience. Our new retirement program continues to provide highly 
competitive benefits and is expected to contribute approximately $33 million in savings in 2017. We are 
implementing technological enhancements, such as digitizing our credit processes to enhance data collection and 
analysis and improve the customer experience, as well as optimizing our infrastructure and substantially reducing 
the number of IT applications across the bank.

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And we have also begun rationalizing our real estate. While we remain committed to our footprint, with the 
advancement of technology and customers' migration to a broader use of digital channels, we need less space to 
operate our business. The consolidation of 38 banking centers, or about eight percent of our network, of which 
four were closed in the second quarter and 15 were closed in the fourth quarter, is expected to result in $10 
million to $13 million per annum in savings. This is net of customer attrition, which is expected to be nominal as 
we have another banking center within two to five miles for the bulk of the locations that are being closed. Also, 
we have developed a plan to consolidate operations and office space, and are targeting a 500,000-square-foot 
reduction in real estate, which should result in approximately $7 million in savings in 2018.

Collectively, these actions take us a long way towards our goal of achieving a double-digit return on equity in 2018. 
We expect to meet or exceed this goal with sustained growth, net of investment, normal credit costs, continued 
equity buybacks and assuming only a modest increase in rates. In addition, we are targeting an efficiency ratio of 
at or below 60 percent by year-end 2018 and we believe that the December increase in rates will help us reach this 
goal even faster. Importantly, while rising rates can be a significant benefit to Comerica, we are committed to these 
initiatives and are not relying on rate increases or a better economic environment to achieve our objectives.

We believe our stock’s performance in part reflects that investors recognize the value of our GEAR Up initiative. In 
2016, Comerica's stock increased 63 percent, compared to a year ago, outperforming all of our peers as well as the 
KBW Index and S&P 500 Index. In fact, in the S&P 500 Index, we were the best performing financial stock and 
among the top 10 performers overall.

I, along with our executive team, remain very confident that we will continue to meet the financial targets that we 
have established for GEAR Up. We expect the actions we are taking will ensure that we remain a strong partner 
and trusted advisor for our clients in the future, while enhancing shareholder value and achieving a higher  level of 
returns for our shareholders.

2016 Financial Highlights

We reported 2016 net income of $477 million or $2.68 per share, which included $0.34 in restructuring charges.  
Earnings per share increased six percent over 2015, excluding these restructuring charges,* as we began to reap 
the benefits of our GEAR Up initiatives, as well as rising rates. Also, we increased the size of our equity buyback by 
25 percent, which is a reflection of our strong capital position and solid financial performance.

Excluding the $641 million reduction in energy loans, average loans increased over $1 billion or 2 percent. The 
most notable increases in average loans came from areas where we have deep expertise, such as Commercial Real 
Estate, National Dealer Services, and Mortgage Banker Finance.

Average deposits have grown 32 percent over the last five years and reflect our focus on building long-term client 
relationships. In 2016, noninterest-bearing deposits increased $1.7 billion, or 6 percent, while interest-bearing 
deposits declined $2.2 billion. Altogether, total average deposits declined one percent and reflected the 
adjustments made in early 2016 for the new Liquidity Coverage Ratio (LCR) requirements, which were mostly 
offset by significant growth in the third and fourth quarter of 2016.

*Earnings per share decreased 6 percent over 2015, including restructuring charges. For 2016, earnings per share excluding 
restructuring charges is calculated by taking the net income available to common shareholders ($473 million), plus 
restructuring charges net of tax ($59 million), divided by diluted average common shares (177 million).

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We had $1.8 billion of net interest income in 2016, an increase of 6 percent, primarily the result of higher interest 
rates, loan growth and a larger securities portfolio, partially offset by modestly higher debt costs.

Credit quality continued to be strong. The provision for credit losses increased primarily due to a larger reserve 
required for Energy loans in the first quarter of 2016, partially offset by improvements in the remainder of the 
portfolio. Net charge-offs of 32 basis points were at the low end of our through-the-cycle average, and excluding 
energy line of business, our net charge-offs were 13 basis points.

With respect to noninterest income, customer-driven fees increased $22 million, or over two percent. We had a 
large increase in card fees, as well as growth in fiduciary, foreign exchange and brokerage fees as we continue to 
focus on growing and expanding relationships.

Noninterest expenses declined $23 million after excluding restructuring charges of $93 million, as well as a $33 
million release of litigation reserves in 2015. Our GEAR Up initiative drove over $25 million in expense savings. 

In June 2016, we announced that the Federal Reserve did not object to our 2016 Capital Plan. In April and July 
2016, our board of directors increased the quarterly cash dividend for common stock by 5 percent and 4.5 percent, 
respectively, to 23 cents per share. We repurchased 6.6 million shares in 2016 under our equity repurchase 
program. Through the buyback and dividends, we returned $458 million, or 96 percent, of 2016 net income to 
shareholders. Our regulatory capital levels remain comfortably above the threshold to be considered well-
capitalized. 

In summary, the skillful execution of our GEAR Up initiative, a modest rise in rates, and a 25 percent increase in our 
equity repurchase program resulted in a six percent increase in our 2016 earnings per share before restructuring 
expenses, and improvements in our efficiency ratio and returns on assets and equity. Our book value increased 
three percent over the past year, to $44.47, and tangible book value per share increased four percent over the past 
year, to $40.79, as we continue to focus on creating long-term shareholder value.**

**See Supplemental Financial Data section for reconcilements of non-GAAP financial measures.

Relationship Banking Strategy and Balanced Geographic Footprint Keys to Success

Our relationship banking strategy and balanced geographic markets are important drivers of our success. Comerica 
strives to be the trusted advisor to our clients, providing them with financial products and services they need to 
prosper. Our geographic footprint is well situated and provides diversity and significant growth opportunities. We 
remain committed to delivering exceptional customer experiences that exceed expectations and deliver a higher 
level of banking.

Regarding our footprint, we have a strong presence in the major metropolitan areas of Texas, California and 
Michigan, providing us with a balanced market presence. We also have locations in Arizona and Florida, with 
certain businesses operating in several other states, as well as Canada and Mexico. While our unique geographic 
footprint provides us with economic diversity, we operate as ‘one bank’ and our policies, procedures and systems 
are integrated across our footprint. A single platform provides significant synergies and is highly efficient and cost 
effective.

TEXAS: We’ve had a presence in Texas for almost three decades and moved our corporate headquarters to Dallas 
nearly 10 years ago. We have operations throughout Dallas-Fort Worth, Houston, Austin, and San Antonio. We 
continue to leverage our standing as the largest U.S. commercial bank headquartered in the state to generate new 
customer relationships.

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The Texas economy has proved to be very resilient in adjusting to the challenging low oil price environment. We 
believe that the state’s important energy sector is starting to turn the corner, aided by firmer prices and strong 
demand. We expect Texas to continue to generate new jobs and business opportunities, supported by a healthier 
energy sector and a stronger U.S. economy in 2017.

CALIFORNIA: We have had a presence in California for more than 25 years. San Jose serves as our market 
headquarters. Additionally, we have a presence in the Greater San Francisco area, Los Angeles, Orange County, San 
Diego, Sacramento, and Santa Cruz/Monterey.

We expect California’s economy to be a solid performer in 2017. Expanding U.S. and global economies plus the 
accelerated diffusion of new technologies into the broader economy will support the state’s important technology 
sector. Likewise, improving domestic and international economic conditions are positive factors for the state’s 
entertainment industry.

MICHIGAN: In Michigan, we operate in Detroit, which is our market headquarters, as well as in the Detroit 
metropolitan area, Ann Arbor, Battle Creek, Grand Rapids, Jackson, Kalamazoo, Lansing, Midland, and Muskegon. 
We have maintained a continuous presence in Michigan since 1849, and continue to hold the second largest 
deposit market share in the state, based on the latest FDIC deposit market share survey.

The Michigan economy continues to improve, buoyed by a strengthening manufacturing sector. U.S. auto sales 
remain strong and the auto industry is in the midst of an exciting surge in new technologies, including the 
innovation of state-of-the-art “smart car” driving systems. Michigan’s leading academic institutions are playing a 
key role in developing these new technologies and incubating new business opportunities.

Our Three Strategic Lines of Business

In addition to our diverse footprint, growth is driven by our three strategic lines of business. Our model continues 
to be weighted toward commercial banking through our Business Bank and complemented by the Retail Bank and 
Wealth Management.

Within the Business Bank, Middle Market Banking remains our "bread and butter." It is where we have a 
competitive advantage due to the depth and breadth of our expertise in this area. As part of our GEAR Up 
initiative, we are taking steps to nationalize our middle market sales process. We are doing this by leveraging our 
best practices and conducting business in a consistent manner throughout our enterprise. Our focus is on sales 
enablement, organizational consistency, operational efficiency and talent management. Nationalizing our middle 
market sales process will be an important initiative for us throughout 2017. And it is expected to result in 
improved productivities, revenue generation and reduced expenses.

In May, Comerica was honored to be selected by the U.S. Treasury to be their Financial Agent providing merchant 
card services, also known as Card Acquiring Services. With a five year contract, this business includes 
approximately 7,000 merchant accounts, representing a multitude of government agencies, and an estimated $12 
billion in annual payments volume. This expands our relationship with the U.S. Treasury, which already included 
DirectExpress®, the program that provides Social Security payments via a pre-paid card, and myRA®, a savings 
option for those who do not have access to a retirement savings plan at work.

Our Retail Bank continues to focus on ensuring we have the products, services and locations to meet customer 
needs. In addition to strategically repositioning our banking center network through consolidations and 
relocations, we completed more than two dozen interior refurbishments in 2016, which included transitions to 
new design concepts and teller cash recyclers to improve efficiency. 

4

We also successfully deployed transformational technologies at our Greenville banking center in Dallas, building 
upon the successful deployment of these technologies at banking centers in Michigan and California. 
Approximately 90 percent of transactions at the Greenville banking center are processed via the ATMs and 
BankerConnect, our interactive teller-like machine. In addition, we introduced Comerica-branded ATMs at the 
highly-trafficked Detroit Metropolitan Airport.

Also within the Retail Bank, we made Web Banking and Bill Pay upgrades, including the launch of Web Banking 
Combined View, which allows our Web Banking customers to combine accounts with different taxpayer 
identification numbers under one Web Banking ID, fulfilling a significant customer request. Furthermore, we 
launched a web-based Comerica Insurance Services platform that enables customers to compare shop and buy a 
variety of insurance products from multiple providers.

Small Business successes in 2016 included the integration of a new centralized underwriting center that supports 
relationships up to $1.5 million in exposure. This contributed to improved speed-to-market for these types of 
loans.

Wealth Management enables us to bring private banking, investment management and fiduciary services to our 
Business Bank and Retail Bank clients.  In large part due to our GEAR Up initiative, Wealth Management made 
notable progress in growing loans and fee income, while controlling expenses, and managing risk appropriately.  In 
2017, we will launch the Wealth Productivity Transformation initiative, which includes the implementation of a 
relationship management tool that we believe will enable our colleagues to drive market share and better serve 
our clients. Wealth Management also expects to leverage technology to increase productivity, increase share of 
wallet, and reduce time to close.

Well Positioned for Rising Rates

The Federal Reserve increased its benchmark rate 25 basis points in December 2016, marking only the second 
change it has made to the short-term benchmark rate in eight years. As I previously mentioned, our 2016 financial 
results benefited meaningfully from the December 2015 rate increase. Comerica's business model continues to be 
well positioned for a rising rate environment.

Our balance sheet is sensitive to movement in interest rates, since the majority of our revenue is derived from the 
interest we receive on loans we provide to our clients. Our loan portfolio represents over two-thirds of our total 
assets as of December 31, 2016, and over 90 percent of our loans are floating rate. Therefore, as rates rise, our 
portfolio reprices quickly. In addition, more than 50 percent of our deposits are noninterest-bearing, and, as such, 
are less impacted by movement in rates.  They also provide us a source of low-cost funding as loan growth 
continues.

Energy Portfolio Weathering the Cycle

At year-end 2016, our energy loans had declined $820 million, or 27 percent, from one year ago, bringing our 
Energy line of business to less than five percent of our total loans. Energy Services, which has been most 
significantly impacted this cycle, represented less than one percent of our total loan portfolio. The performance of 
our Energy portfolio has improved. While oil prices have been relatively stable, we continue to be cautious and 
believe we are properly reserved with our loan loss reserve allocation at over seven percent of Energy loans as of 
December 31, 2016. We remain committed to the energy sector and believe that in cycles such as the current one, 
we can further cement our relationship with our clients.

5

Recent Additions Enhance Strong Board

Our board appointed two new independent directors in 2016: Michael Van de Ven, who is the chief operating 
officer of Southwest Airlines, and Mike Collins, who had a distinguished 37-year career at the Federal Reserve Bank 
of Philadelphia. We have a strong and diverse board with a good mix of industry, financial and leadership 
backgrounds. Given the regulated nature of our industry as well as its cyclicality, we believe it is important to have 
long-tenured directors with a deep understanding of our business and environment. However, we also recognize 
the importance of bringing fresh perspectives.

Investments in Cybersecurity Continue

The cybersecurity threat environment is intensifying and Comerica's defenses are ready. Over the past several 
years, Comerica has met this escalating environment with significant investments in its cybersecurity defensive 
posture, building a robust program with advanced identification, protection, detection, response and recovery 
capabilities. We have established a cybersecurity capability that leverages industry standard frameworks and 
targeted regulatory guidance to provide wide coverage, which we evaluate regularly through independent 
assessments. Our security operations center and intelligence capabilities are monitoring our systems 24/7, 
constantly adjusting our defenses to the changing threat environment. 

Opportunities for Regulatory Relief

The national election is bringing change to Washington, D.C. and with it, optimism for regulatory relief for banks, 
particularly those of our size. It now appears to be a legislative priority to reduce complex and costly regulations 
that burden banks and impact the flow of credit to businesses. We believe there is potential for revision or 
elimination of certain aspects of the Dodd-Frank Wall Street Reform and Consumer Protection Act that could 
benefit Comerica and the industry as a whole. This includes changes to the definition of a systemically important 
financial institution (SIFI) from the current $50 billion and above in assets to either a higher asset threshold or a 
metrics-based formula to determine a firm's true complexity and risk profile. We believe a positive change to the 
SIFI designation would be a major step toward the kind of regulatory relief that would potentially spur increased 
lending to businesses, reduce compliance expenses, and allow us to manage capital and liquidity to meet our 
needs in a more prudent manner.  

Our Strong Commitment to Community, Diversity, Financial Literacy and Sustainability

Comerica continued its commitment to the communities in which we operate in 2016. Comerica contributed more 
than $8 million to not-for-profit organizations in the markets we serve, and, in addition, our employees raised 
nearly $1.7 million for the United Way and Black United Fund. Our team also donated their personal time and 
talents - about $1.3 million worth in volunteer hours - to make a positive difference in our local communities.

Some of the recognition we received for our efforts included the prestigious Corporate Social Responsibility Award 
from the Financial Services Roundtable. In addition, Comerica was named as one of the 50 most community-
minded companies in the nation as part of the Civic 50, an initiative of Points of Light, the world's largest 
organization dedicated to volunteer service.

6

Our community “Shred Day” events continue to serve as the largest, most visible and most successful brand 
awareness, public education, colleague engagement, and community service campaigns that we host. Working 
with event partner Iron Mountain at shred-day events in Dallas, Houston, Phoenix and Detroit, we securely 
destroyed and recycled more than 800,000 pounds of paper in 2016, while gathering donations for local food 
banks. These signature events continue to provide a triple bottom line: helping reduce fraud and identity theft, 
freeing up hundreds of tons of space in local landfills, and raising awareness of hunger in our communities.

We marked the fifth year of the Comerica Hatch Detroit Contest by more than doubling our commitment. In 
addition to providing the grand prize for the winning idea for a new retail business, we invested funds to help 
launch even more small businesses in the city. Fifteen new businesses are now open, thanks to the contest's 
success. We sponsored a similar contest in Dallas with the Dallas Entrepreneur Center and Tech Wildcatters. These 
contests offer us an opportunity to advance the aspirations of entrepreneurs in our markets.

Diversity is an important core value at Comerica. We support 39 diversity-focused teams within the bank that 
promote employee engagement, business outreach, and diversity awareness and learning among colleagues. 
Comerica's focus on diversity has been favorably recognized, as we earned a third consecutive perfect 100 rating 
on the Human Rights Campaign Foundation's 2017 Corporate Equality Index, a national benchmarking survey and 
report on corporate policies and practices related to LGBT workplace equality.

Black Enterprise magazine placed Comerica on its 2016 “40 Best Companies for Diversity” list. Comerica also 
ranked No. 2 on the DiversityInc 2016 Top 10 Regional Companies for Diversity. In addition, we were named to 
LATINO magazine’s 2016 “LATINO 100” list, the fourth annual listing of the top 100 companies providing the most 
opportunities for Latinos in such areas as education, hiring, workforce diversity, minority business development, 
governance and philanthropy.

We also ranked among 2016's "Best Places for Women and Diverse Managers to Work" by Diversity MBA, which is 
a national leadership organization targeting leadership and talent management among professionals, managers 
and executives. In addition, Comerica was named among the "Top 25 Companies for Diversity in Texas" by the 
National Diversity Council. The award is based on women and minority representation in executive leadership and 
on boards of directors.

We continued to expand our financial education efforts throughout our footprint in 2016, with some impressive 
results. The Comerica Money $ense program, which has been incorporated into the classrooms of 41 elementary 
schools throughout Maricopa, Palm Beach and Broward counties in Florida, is a web-based financial education 
program designed by leading technology company, EverFi. During the 2015-2016 school year, more than 2,100 
students were served by the Comerica-funded program, with more than 6,000 learning modules completed to 
help predominantly low- and moderate-income students learn how to make wise financial decisions.

Comerica recognizes the business value created through sustainability and that’s why it is embedded in our core 
values. We continued our progress on reducing our environmental footprint in line with Comerica’s 2020 
Environmental Sustainability Goals and remain ahead of pace on our efforts to reduce greenhouse gas emissions, 
water consumption, and paper use by 2020. In addition, we exceeded our goal of reducing waste sent to the 
landfill four years ahead of schedule by achieving a 24.1 percent reduction compared to our goal of 20 percent. 
Also, Comerica continues to support a green economy with nearly $900 million of environmentally beneficial loans 
and commitments to companies in 13 different categories.

7

In 2016, we were once again recognized for our climate change management strategy and emissions reduction 
efforts through CDP (formerly known as the Carbon Disclosure Project), receiving an “A-“ rating, among the highest 
scores in the U.S. financial services industry.  Our work on supply chain sustainability earned Comerica its third 
consecutive Green Supply Chain Award from Supply & Demand Chain Executive magazine, and we were pleased to 
be listed on the FTSE4Good index series for the 8th consecutive year.

Positioned for Future Growth

In closing, 2016 was a pivotal year with the development and implementation of our enterprise-wide GEAR Up 
initiative. We have made significant progress in executing the expense savings and are fully committed to 
delivering on the efficiency and revenue opportunities to further enhance our profitability and shareholder value.  
We also benefited meaningfully from increased interest rates and our overall credit metrics remained strong as we 
continued to navigate the energy cycle. In addition, there has been much discussion in Washington, D.C. about 
plans to reduce taxes, provide regulatory relief and fiscal stimulus to drive economic growth. While there is no 
certainty as to what changes may prevail, we believe our customers and Comerica should benefit if changes are 
made. We believe we are well positioned for the future as our geographic footprint is well situated and our 
relationship banking strategy can drive superior growth of loans, deposits and fee income over time.

Thank you for your continued support.

74_40.444, 
74_40.444, 
74_40.444, 

Ralph W. Babb Jr.
Chairman and Chief Executive Officer 

8

Board of Directors

Ralph W. Babb Jr.
CHAIRMAN AND CHIEF EXECUTIVE OFFICER
Comerica Incorporated and Comerica Bank

Michael E. Collins (4)
CHAIR AND SENIOR COUNSELOR
Blake Collins Group (Public Relations and Communications Firm)
FORMER CONSULTANT
Federal Reserve Bank of Cleveland (Federal Bank Regulator)
FORMER EXECUTIVE VICE PRESIDENT
Federal Reserve Bank of Philadelphia (Federal Bank Regulator)

Roger A. Cregg (1)(2)(3)
PRESIDENT AND CHIEF EXECUTIVE OFFICER   
AV Homes, Inc. (Developer and Homebuilder in Florida, Arizona and North Carolina)

T. Kevin DeNicola (1*)(3*)(4)
FORMER CHIEF FINANCIAL OFFICER
KIOR, Inc. (Biofuels Company)

Jacqueline P. Kane (2)
RETIRED EXECUTIVE VICE PRESIDENT, HUMAN RESOURCES
AND CORPORATE AFFAIRS
The Clorox Company (Manufacturer and Marketer of Consumer Products)

Richard G. Lindner (2*)(4)
RETIRED SENIOR EXECUTIVE VICE PRESIDENT
AND CHIEF FINANCIAL OFFICER
AT&T, Inc. (Global Telecommunications Company)

Alfred A. Piergallini (2)
CONSULTANT
Desert Trail Consulting (Marketing Consulting Organization)

Robert S. Taubman (4)
CHAIRMAN, PRESIDENT AND CHIEF EXECUTIVE OFFICER
Taubman Centers, Inc.
(REIT that Owns, Develops and Operates Regional Shopping Centers Nationally) and The Taubman Company (Shopping Center 
Management Company Engaged in Leasing, Management and Construction Supervision)

Reginald M. Turner Jr. (1)(3)(4*)
ATTORNEY
Clark Hill PLC (Law Firm)

Nina G. Vaca (1)(3)(4)
CHAIRMAN AND CHIEF EXECUTIVE OFFICER
Pinnacle Technical Resources, Inc. (Staffing, Vendor Management and Information Technology Services Firm)
and Vaca Industries Inc. (Management Company)

Michael G. Van de Ven (4)
EXECUTIVE VICE PRESIDENT AND CHIEF OPERATING OFFICER
Southwest Airlines Co. (A Passenger Airline)

(1) Audit Committee
(2) Governance, Compensation and Nominating Committee
(3) Qualified Legal Compliance Committee
(4) Enterprise Risk Committee
* Committee Chairperson

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Senior Leadership Team

Ralph W. Babb Jr.
CHAIRMAN AND CHIEF EXECUTIVE OFFICER

Curtis C. Farmer
PRESIDENT

David E. Duprey
EXECUTIVE VICE PRESIDENT AND CHIEF FINANCIAL OFFICER

John D. Buchanan
EXECUTIVE VICE PRESIDENT
CHIEF LEGAL OFFICER/GENERAL COUNSEL

Megan D. Burkhart
EXECUTIVE VICE PRESIDENT
AND CHIEF HUMAN RESOURCES OFFICER

Peter W. Guilfoile
EXECUTIVE VICE PRESIDENT AND CHIEF CREDIT OFFICER

Judith S. Love
PRESIDENT
Comerica Bank - California Market

Michael H. Michalak
EXECUTIVE VICE PRESIDENT AND CHIEF RISK OFFICER

Christine M. Moore
EXECUTIVE VICE PRESIDENT AND GENERAL AUDITOR

Paul R. Obermeyer
EXECUTIVE VICE PRESIDENT
Enterprise Technology and Operations

Michael T. Ritchie
PRESIDENT
Comerica Bank - Michigan Market

Peter L. Sefzik
PRESIDENT
Comerica Bank - Texas Market

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-K
Annual Report Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934
For the fiscal year ended
December 31, 2016 
Commission file number 1-10706
COMERICA INCORPORATED
(Exact Name of Registrant as Specified in Its Charter)

Delaware
(State or Other Jurisdiction of Incorporation)

38-1998421
(IRS Employer Identification Number)

Comerica Bank Tower
1717 Main Street, MC 6404
Dallas, Texas 75201
(Address of Principal Executive Offices) (Zip Code)

(214) 462-6831
(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of
the Exchange Act:

Common Stock, $5 par value

    Warrants to Purchase Common Stock (expiring November 14, 2018)
These securities are registered on the New York Stock Exchange.

Securities registered pursuant to Section 12(g) of the
Exchange Act:
    Warrants to Purchase Common Stock (expiring December 12, 2018)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes 

 No 

Indicate by check mark if registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes 

 No 

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities 
Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has 
been subject to such filing requirements for the past 90 days. Yes 

 No 

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive 
Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months 
(or for such shorter period that the registrant was required to submit and post such files). Yes 

 No 

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405) is not contained herein, 
and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III 
of this Form 10-K or any amendment to this Form 10-K. 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller 
reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the 
Exchange Act.

Large accelerated
filer 

Accelerated
filer 

Non-accelerated filer 
(Do not check if a smaller
reporting company)

Smaller reporting
company 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes 

No 

At June 30, 2016 (the last business day of the registrant’s most recently completed second fiscal quarter), the registrant’s common 
stock, $5 par value, held by non-affiliates had an aggregate market value of approximately $7.0 billion based on the closing price on the New 
York Stock Exchange on that date of $41.13 per share. For purposes of this Form 10-K only, it has been assumed that all common shares 
Comerica’s Trust Department holds for Comerica’s employee plans, and all common shares the registrant’s directors and executive officers hold, 
are shares held by affiliates.

At February 10, 2017, the registrant had outstanding 175,858,751 shares of its common stock, $5 par value.

Documents Incorporated by Reference:

Part III:
Items 10-14—Proxy Statement for the Annual Meeting of Shareholders to be held April 25, 2017.

TABLE OF CONTENTS

PART I

Item 1. Business.

Item 1A. Risk Factors.

Item 1B. Unresolved Staff Comments.

Item 2. Properties.

Item 3. Legal Proceedings.

Item 4. Mine Safety Disclosures.

PART II

Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 

Securities.

Item 6. Selected Financial Data.

Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Item 8. Financial Statements and Supplementary Data.

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

Item 9A. Controls and Procedures.

Item 9B. Other Information.

PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Item 11. Executive Compensation.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder 

Matters.

Item 13. Certain Relationships and Related Transactions, and Director Independence.

Item 14. Principal Accountant Fees and Services.

PART IV

Item 15. Exhibits and Financial Statement Schedules

Item 16. Form 10-K Summary

FINANCIAL REVIEW AND REPORTS
SIGNATURES
EXHIBIT INDEX

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1

12

19

19

19

19

20

20

21

21

21

21

21

21

22

22

22

22

22

22

22

22

22

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F-1
S-1
E-1

PART I

Item 1. Business.

GENERAL

Comerica Incorporated (“Comerica”) is a financial services company, incorporated under the laws of the State of Delaware, 
and headquartered in Dallas, Texas. Based on total assets as reported in the most recently filed Consolidated Financial Statements 
for  Bank  Holding  Companies  (FR Y-9C),  it  was  among  the  25  largest  commercial  United  States  (“U.S.”)  financial  holding 
companies. Comerica was formed in 1973 to acquire the outstanding common stock of Comerica Bank, which at such time was 
a Michigan banking corporation and one of Michigan's oldest banks (formerly Comerica Bank-Detroit). On October 31, 2007, 
Comerica  Bank,  a  Michigan  banking  corporation,  was  merged  with  and  into  Comerica  Bank,  a  Texas  banking  association 
(“Comerica Bank”). As of December 31, 2016, Comerica owned directly or indirectly all the outstanding common stock of 2 active 
banking and 33 non-banking subsidiaries. At December 31, 2016, Comerica had total assets of approximately $73.0 billion, total 
deposits of approximately $59.0 billion, total loans (net of unearned income) of approximately $49.1 billion and shareholders’ 
equity of approximately $7.8 billion.

Business Segments

Comerica has strategically aligned its operations into three major business segments: the Business Bank, the Retail Bank, 
and Wealth Management. In addition to the three major business segments, Finance is also reported as a segment. We provide 
information  about  our  business  segments  and  the  principal  products  and  services  provided  by  these  segments  in  Note 23  on 
pages F-102 through F-105 of the Notes to Consolidated Financial Statements located in the Financial Section of this report.

Comerica operates in three primary geographic markets - Texas, California, and Michigan, as well as in Arizona and 
Florida, with select businesses operating in several other states, and in Canada and Mexico. We provide information about our 
market segments in Note 23 on pages F-102 through F-105 of the Notes to Consolidated Financial Statements located in the 
Financial Section of this report. 

Activities with customers domiciled outside the U.S., in total or with any individual country, are not significant. We 
provide information on risks attendant to foreign operations: (1) under the caption “Concentration of Credit Risk” on page F-29 
of the Financial Section of this report; and (2) under the caption "International Exposure" on pages F-31 through F-32 of the 
Financial Section of this report.

We provide information about the net interest income and noninterest income we received from our various classes of 
products and services: (1) under the caption, “Analysis of Net Interest Income” on page F-6 of the Financial Section of this report; 
(2) under the caption “Net Interest Income” on pages F-7 through F-8 of the Financial Section of this report; and (3) under the 
caption “Noninterest Income” on pages F-8 through F-9 of the Financial Section of this report. 

COMPETITION

The financial services business is highly competitive. Comerica and its subsidiaries mainly compete in their three primary 
geographic markets of Texas, California and Michigan, as well as in the states of Arizona and Florida. They also compete in 
broader, national geographic markets, as well as markets in Mexico and Canada. They are subject to competition with respect to 
various products and services, including, without limitation, loans and lines of credit, deposits, cash management, capital market 
products, international trade finance, letters of credit, foreign exchange management services, loan syndication services, consumer 
lending, consumer deposit gathering, mortgage loan origination, consumer products, fiduciary services, private banking, retirement 
services, investment management and advisory services, investment banking services, brokerage services, the sale of annuity 
products, and the sale of life, disability and long-term care insurance products. 

Comerica competes in terms of products and pricing with large national and regional financial institutions and with 
smaller financial institutions. Some of Comerica's larger competitors, including certain nationwide banks that have a significant 
presence in Comerica's market area, may make available to their customers a broader array of product, pricing and structure 
alternatives and, due to their asset size, may more easily absorb credit losses in a larger overall portfolio. Some of Comerica's 
competitors (larger or smaller) may have more liberal lending policies and processes. Further, Comerica's banking competitors 
may be subject to a significantly different or reduced degree of regulation due to their asset size or types of products offered. They 
may also have the ability to more efficiently utilize resources to comply with regulations or may be able to more effectively absorb 
the costs of regulations into their existing cost structure. Comerica believes that the level of competition in all geographic markets 
will continue to increase in the future. 

 In addition to banks, Comerica's banking subsidiaries also face competition from other financial intermediaries, including 
savings and loan associations, consumer finance companies, leasing companies, venture capital funds, credit unions, investment 
banks, insurance companies and securities firms. Competition among providers of financial products and services continues to 
increase, with consumers having the opportunity to select from a growing variety of traditional and nontraditional alternatives. 
The  ability  of  non-banking  financial  institutions  to  provide  services  previously  limited  to  commercial  banks  has  intensified 
1

competition. Because non-banking financial institutions are not subject to many of the same regulatory restrictions as banks and 
bank holding companies, they can often operate with greater flexibility and lower cost structures. 

In addition, the industry continues to consolidate, which affects competition by eliminating some regional and local 

institutions, while strengthening the franchises of acquirers.

SUPERVISION AND REGULATION

Banks, bank holding companies, and financial institutions are highly regulated at both the state and federal level. Comerica 
is subject to supervision and regulation at the federal level by the Board of Governors of the Federal Reserve System (“FRB”) 
under the Bank Holding Company Act of 1956, as amended. The Gramm-Leach-Bliley Act expanded the activities in which a 
bank holding company registered as a financial holding company can engage. The conditions to be a financial holding company 
include, among others, the requirement that each depository institution subsidiary of the holding company be well capitalized and 
well managed. Effective July 2011, the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”) 
also requires the well capitalized and well managed standards to be met at the financial holding company level. Comerica became 
a financial holding company in 2000. As a financial holding company, Comerica may affiliate with securities firms and insurance 
companies, and engage in activities that are financial in nature. Activities that are “financial in nature” include, but are not limited 
to: securities underwriting; securities dealing and market making; sponsoring mutual funds and investment companies (subject to 
regulatory requirements, including restrictions set forth in the Volcker Rule, described under the heading "The Dodd-Frank Wall 
Street Reform and Consumer Protection Act and Recent Legislative and Regulatory Developments" below); insurance underwriting 
and agency; merchant banking; and activities that the FRB has determined to be financial in nature or incidental or complementary 
to a financial activity, provided that it does not pose a substantial risk to the safety or soundness of the depository institution or 
the financial system generally. A bank holding company that is not also a financial holding company is limited to engaging in 
banking and other activities previously determined by the FRB to be closely related to banking.

Comerica Bank is chartered by the State of Texas and at the state level is supervised and regulated by the Texas Department 
of Banking under the Texas Finance Code. Comerica Bank has elected to be a member of the Federal Reserve System under the 
Federal Reserve Act and, consequently, is supervised and regulated by the Federal Reserve Bank of Dallas. Comerica Bank & 
Trust,  National Association  is  chartered  under  federal  law  and  is  subject  to  supervision  and  regulation  by  the  Office  of  the 
Comptroller of the Currency (“OCC”) under the National Bank Act. Comerica Bank & Trust, National Association, by virtue of 
being a national bank, is also a member of the Federal Reserve System. The deposits of Comerica Bank and Comerica Bank & 
Trust, National Association are insured by the Deposit Insurance Fund of the Federal Deposit Insurance Corporation (“FDIC”) to 
the extent provided by law. Certain transactions executed by Comerica Bank are also subject to regulation by the U.S. Commodity 
Futures Trading Commission. In Canada, Comerica Bank is supervised by the Office of the Superintendent of Financial Institutions 
and in Mexico, by the Banco de México.

The FRB supervises non-banking activities conducted by companies directly and indirectly owned by Comerica. In 
addition, Comerica's non-banking subsidiaries are subject to supervision and regulation by various state, federal and self-regulatory 
agencies, including, but not limited to, the Financial Industry Regulatory Authority, Inc. (in the case of Comerica Securities, Inc.), 
the Department of Insurance and Financial Services of the State of Michigan (in the case of Comerica Insurance Services, Inc.), 
the Department of Licensing and Regulatory Affairs (in the case of Comerica Securities, Inc.) and the Securities and Exchange 
Commission (“SEC”) (in the case of Comerica Securities, Inc. and World Asset Management, Inc.). 

Described below are material elements of selected laws and regulations applicable to Comerica and its subsidiaries. The 
descriptions are not intended to be complete and are qualified in their entirety by reference to the full text of the statutes and 
regulations described. Changes in applicable law or regulation, and in their application by regulatory agencies, cannot be predicted, 
but they may have a material effect on the business of Comerica and its subsidiaries. 

Requirements for Approval of Acquisitions and Activities 

In most cases, no FRB approval is required for Comerica to acquire a company engaged in activities that are financial 
in nature or incidental to activities that are financial in nature, as determined by the FRB. However, Federal and state laws impose 
notice and approval requirements for mergers and acquisitions of other depository institutions or bank holding companies. Prior 
approval is required before Comerica may acquire the beneficial ownership or control of more than 5% of the voting shares or 
substantially all of the assets of a bank holding company (including a financial holding company) or a bank. 

The  Community  Reinvestment Act  of  1977  (“CRA”)  requires  U.S.  banks  to  help  serve  the  credit  needs  of  their 
communities. Comerica Bank's current rating under the “CRA” is “satisfactory”. If any subsidiary bank of Comerica were to 
receive a rating under the CRA of less than “satisfactory,” Comerica would be prohibited from engaging in certain activities. 

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In addition, Comerica, Comerica Bank and Comerica Bank & Trust, National Association, are each “well capitalized” 
and “well managed” under FRB standards. If any subsidiary bank of Comerica were to cease being “well capitalized” or “well 
managed” under applicable regulatory standards, the FRB could place limitations on Comerica's ability to conduct the broader 
financial activities permissible for financial holding companies or impose limitations or conditions on the conduct or activities of 
Comerica or its affiliates. If the deficiencies persisted, the FRB could order Comerica to divest any subsidiary bank or to cease 
engaging in any activities permissible for financial holding companies that are not permissible for bank holding companies, or 
Comerica could elect to conform its non-banking activities to those permissible for a bank holding company that is not also a 
financial holding company. 

Further, the effectiveness of Comerica and its subsidiaries in complying with anti-money laundering regulations (discussed 

below) is also taken into account by the FRB when considering applications for approval of acquisitions.

Transactions with Affiliates

Various governmental requirements, including Sections 23A and 23B of the Federal Reserve Act and the FRB's Regulation 
W, limit borrowings by Comerica and its nonbank subsidiaries from its affiliate insured depository institutions, and also limit 
various other  transactions between  Comerica and its  nonbank subsidiaries, on  the one hand,  and Comerica's affiliate insured 
depository institutions, on the other. For example, Section 23A of the Federal Reserve Act limits the aggregate outstanding amount 
of any insured depository institution's loans and other “covered transactions” with any particular nonbank affiliate to no more than 
10% of the institution's total capital and limits the aggregate outstanding amount of any insured depository institution's covered 
transactions with all of its nonbank affiliates to no more than 20% of its total capital. “Covered transactions” are defined by statute 
to include a loan or extension of credit, as well as a purchase of securities issued by an affiliate, a purchase of assets (unless 
otherwise exempted by the FRB) from the affiliate, the acceptance of securities issued by the affiliate as collateral for a loan, and 
the issuance of a guarantee, acceptance or letter of credit on behalf of an affiliate. Section 23A of the Federal Reserve Act also 
generally requires that an insured depository institution's loans to its nonbank affiliates be, at a minimum, 100% secured, and 
Section 23B of the Federal Reserve Act generally requires that an insured depository institution's transactions with its nonbank 
affiliates be on terms and under circumstances that are substantially the same or at least as favorable as those prevailing for 
comparable transactions with nonaffiliates. The Dodd-Frank Act applied the 10% of capital limit on covered transactions to financial 
subsidiaries and amended the definition of “covered transaction” to include (i) securities borrowing or lending transactions with 
an affiliate, and (ii) all derivatives transactions with an affiliate, to the extent that either causes a bank or its affiliate to have credit 
exposure to the securities borrowing/lending or derivative counterparty.

Privacy

The privacy provisions of the Gramm-Leach-Bliley Act generally prohibit financial institutions, including Comerica, 
from disclosing nonpublic personal financial information of consumer customers to third parties for certain purposes (primarily 
marketing) unless customers have the opportunity to “opt out” of the disclosure. The Fair Credit Reporting Act restricts information 
sharing among affiliates for marketing purposes.

Anti-Money Laundering Regulations

The Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism 
Act  (“USA  PATRIOT Act”)  of  2001  and  its  implementing  regulations  substantially  broadened  the  scope  of  U.S.  anti-money 
laundering laws and regulations by requiring insured depository institutions, broker-dealers, and certain other financial institutions 
to  have  policies,  procedures,  and  controls  to  detect,  prevent,  and  report  money  laundering  and  terrorist  financing. The  USA 
PATRIOT Act and its regulations also provide for information sharing, subject to conditions, between federal law enforcement 
agencies  and  financial  institutions,  as  well  as  among  financial  institutions,  for  counter-terrorism  purposes.  Federal  banking 
regulators are required, when reviewing bank holding company acquisition and bank merger applications, to take into account the 
effectiveness of the anti-money laundering activities of the applicants. To comply with these obligations, Comerica and its various 
operating units have implemented appropriate internal practices, procedures, and controls.

Interstate Banking and Branching

The Interstate Banking and Branching Efficiency Act (the “Interstate Act”), as amended by the Dodd-Frank Act, permits 
a bank holding company, with FRB approval, to acquire banking institutions located in states other than the bank holding company's 
home state without regard to whether the transaction is prohibited under state law, but subject to any state requirement that the 
bank has been organized and operating for a minimum period of time, not to exceed five years, and the requirement that the bank 
holding company, prior to and following the proposed acquisition, control no more than 10% of the total amount of deposits of 
insured depository institutions in the U.S. and no more than 30% of such deposits in that state (or such amount as established by 
state law if such amount is lower than 30%). The Interstate Act, as amended, also authorizes banks to operate branch offices outside 
their home states by merging with out-of-state banks, purchasing branches in other states and by establishing de novo branches 
in other states, subject to various conditions. In the case of purchasing branches in a state in which it does not already have banking 
operations, the “host” state must have “opted-in” to the Interstate Act by enacting a law permitting such branch purchases. The 

3

 
Dodd-Frank Act expanded the de novo interstate branching authority of banks beyond what had been permitted under the Interstate 
Act by eliminating the requirement that a state expressly “opt-in” to de novo branching, in favor of a rule that de novo interstate 
branching is permissible if under the law of the state in which the branch is to be located, a state bank chartered by that state would 
be permitted to establish the branch. The Dodd-Frank Act also requires that a bank holding company or bank be well capitalized 
and well managed (rather than simply adequately capitalized and adequately managed) in order to take advantage of these interstate 
banking and branching provisions.

Comerica has consolidated the majority of its banking business into one bank, Comerica Bank, with banking centers in 

Texas, Arizona, California, Florida and Michigan, as well as Canada.

Dividends

Comerica is a legal entity separate and distinct from its banking and other subsidiaries. Most of Comerica's revenues 
result from dividends its bank subsidiaries pay it. There are statutory and regulatory requirements applicable to the payment of 
dividends by subsidiary banks to Comerica, as well as by Comerica to its shareholders. Certain, but not all, of these requirements 
are discussed below.

Comerica Bank and Comerica Bank & Trust, National Association are required by federal law to obtain the prior approval 
of the FRB and/or the OCC, as the case may be, for the declaration and payment of dividends, if the total of all dividends declared 
by the board of directors of such bank in any calendar year will exceed the total of (i) such bank's retained net income (as defined 
and interpreted by regulation) for that year plus (ii) the retained net income (as defined and interpreted by regulation) for the 
preceding two years, less any required transfers to surplus or to fund the retirement of preferred stock. At January 1, 2017, Comerica's 
subsidiary banks could declare aggregate dividends of approximately $142 million from retained net profits of the preceding two 
years. Comerica's subsidiary banks declared dividends of $545 million in 2016, $437 million in 2015 and $380 million in 2014. 

Further, federal regulatory agencies can prohibit a banking institution or bank holding company from engaging in unsafe 
and unsound banking practices and could prohibit the payment of dividends under circumstances in which such payment could 
be  deemed  an  unsafe  and  unsound  banking  practice.  Under  the  Federal  Deposit  Insurance  Corporation  Improvement  Act 
(“FDICIA”), “prompt corrective action” regime discussed below, which applies to each of Comerica Bank and Comerica Bank 
& Trust, National Association, a subject bank is specifically prohibited from paying dividends to its parent company if payment 
would result in the bank becoming “undercapitalized.” In addition, Comerica Bank is also subject to limitations under Texas state 
law regarding the amount of earnings that may be paid out as dividends to its parent company, and requiring prior approval for 
payments of dividends that exceed certain levels.

Additionally, the payment of dividends by Comerica to its shareholders is subject to the non-objection of the FRB pursuant 
to the Comprehensive Capital Analysis and Review (CCAR) program. For more information, please see “The Dodd-Frank Wall 
Street Reform and Consumer Protection Act and Recent Legislative and Regulatory Developments” in this section.

Source of Strength and Cross-Guarantee Requirements

Federal law and FRB regulations require that bank holding companies serve as a source of strength to each subsidiary 
bank and commit resources to support each subsidiary bank. This support may be required at times when a bank holding company 
may not be able to provide such support without adversely affecting its ability to meet other obligations. Similarly, under the cross-
guarantee provisions of the Federal Deposit Insurance Act, in the event of a loss suffered or anticipated by the FDIC (either as a 
result of the failure of a banking subsidiary or related to FDIC assistance provided to such a subsidiary in danger of failure), the 
other banking subsidiaries may be assessed for the FDIC's loss, subject to certain exceptions.

Federal Deposit Insurance Corporation Improvement Act 

FDICIA  requires,  among  other  things,  the federal  banking  agencies to  take  “prompt corrective action”  in respect  of 
depository institutions that do not meet minimum capital requirements. FDICIA establishes five capital tiers: “well capitalized,” 
“adequately  capitalized,”  “undercapitalized,”  “significantly  undercapitalized”  and  “critically  undercapitalized.” A  depository 
institution's capital tier will depend upon where its capital levels are in relation to various relevant capital measures, which, among 
others, include a Tier 1 and total risk-based capital measure and a leverage ratio capital measure.

Regulations establishing the specific capital tiers provide that, for a depository institution to be well capitalized, it must 
have a total risk-based capital ratio of at least 10% and a Tier 1 risk-based capital ratio of at least 8%, a common equity Tier 1 
risk-based capital measure of at least 6.5%, a Tier 1 leverage ratio of at least 5% and not be subject to any specific capital order 
or directive. For an institution to be adequately capitalized, it must have a total risk-based capital ratio of at least 8%, a Tier 1 risk-
based capital ratio of at least 6%, a common equity Tier 1 risk-based capital measure of at least 4.5% and a Tier 1 leverage ratio 
of at least 4%. Under certain circumstances, the appropriate banking agency may treat a well capitalized, adequately capitalized 
or undercapitalized institution as if the institution were in the next lower capital category.

As of December 31, 2016, Comerica and its banking subsidiaries exceeded the ratios required for an institution to be 

considered “well capitalized” under these regulations.

4

FDICIA generally prohibits a depository institution from making any capital distribution (including payment of a dividend) 
or  paying  any  management  fee  to  its  holding  company  if  the  depository  institution  would  thereafter  be  undercapitalized. 
Undercapitalized depository institutions are subject to limitations on growth and certain activities and are required to submit an 
acceptable capital restoration plan. The federal banking agencies may not accept a capital plan without determining, among other 
things, that the plan is based on realistic assumptions and is likely to succeed in restoring the depository institution's capital. In 
addition, for a capital restoration plan to be acceptable, the institution's parent holding company must guarantee for a specific time 
period that the institution will comply with such capital restoration plan. The aggregate liability of the parent holding company 
under the guaranty is limited to the lesser of (i) an amount equal to 5% of the depository institution's total assets at the time it 
became undercapitalized, or (ii) the amount that is necessary (or would have been necessary) to bring the institution into compliance 
with all capital standards applicable with respect to such institution as of the time it fails to comply with the plan. If a depository 
institution fails to submit or implement an acceptable plan, it is treated as if it is significantly undercapitalized.

Significantly  undercapitalized  depository  institutions  are  subject  to  a  number  of  requirements  and  restrictions. 
Specifically, such a depository institution may be required to do one or more of the following, among other things: sell sufficient 
voting stock to become adequately capitalized, reduce the interest rates it pays on deposits, reduce its rate of asset growth, dismiss 
certain senior executive officers or directors, or stop accepting deposits from correspondent banks. Critically undercapitalized 
institutions are subject to the appointment of a receiver or conservator or such other action as the FDIC and the applicable federal 
banking agency shall determine appropriate.

As an additional means to identify problems in the financial management of depository institutions, FDICIA requires 
federal bank regulatory agencies to establish certain non-capital safety and soundness standards for institutions any such agency 
supervises. The standards relate generally to, among others, earnings, liquidity, operations and management, asset quality, various 
risk and management exposures (e.g., credit, operational, market, interest rate, etc.) and executive compensation. The agencies 
are authorized to take action against institutions that fail to meet such standards. 

FDICIA also contains a variety of other provisions that may affect the operations of depository institutions including 
reporting requirements, regulatory standards for real estate lending, “truth in savings” provisions, the requirement that a depository 
institution give 90 days prior notice to customers and regulatory authorities before closing any branch, and a prohibition on the 
acceptance or renewal of brokered deposits by depository institutions that are not well capitalized or are adequately capitalized 
and have not received a waiver from the FDIC.

Capital Requirements

Comerica and its bank subsidiaries are subject to risk-based capital requirements and guidelines imposed by the FRB 

and/or the OCC.

For  this  purpose,  a  depository  institution's  or  holding  company's  assets  and  certain  specified  off-balance  sheet 
commitments are assigned to various risk categories defined by the FRB, each weighted differently based on the level of credit 
risk that is ascribed to such assets or commitments, based on counterparty type and asset class. A depository institution's or holding 
company's capital, in turn, is divided into three tiers: Common Equity Tier 1 (“CET1”), additional Tier 1, and Tier 2. CET1 capital 
predominantly includes common shareholders’ equity, less certain deductions for goodwill, intangible assets and deferred tax 
assets that arise from net operating losses and tax credit carry-forwards, if any. Additional Tier 1 capital primarily includes any 
outstanding noncumulative perpetual preferred stock and related surplus. Comerica has also made the election to permanently 
exclude accumulated other comprehensive income related to debt securities, cash flow hedges, and defined benefit postretirement 
plans from CET1 capital. Tier 2 capital primarily includes qualifying subordinated debt and qualifying allowance for credit losses. 
Certain deductions and adjustments to CET1 capital, Tier 1 capital and Tier 2 capital are subject to phase-in through December 
31, 2017. Entities that engage in trading activities, whose trading activities exceed specified levels, also are required to maintain 
capital for market risk. Market risk includes changes in the market value of trading account, foreign exchange, and commodity 
positions, whether resulting from broad market movements (such as changes in the general level of interest rates, equity prices, 
foreign exchange rates, or commodity prices) or from position specific factors. From time to time, Comerica's trading activities 
may exceed specified regulatory levels, in which case Comerica maintains additional capital for market risk as required.

Comerica, like other bank holding companies, currently is required to maintain CET1, Tier 1 (the sum of CET1 and 
additional Tier 1 capital) and “total capital” (the sum of Tier 1 and Tier 2 capital) equal to at least 4.5%, 6% and 8% of its total 
risk-weighted assets (including certain off-balance-sheet items, such as standby letters of credit), respectively. In 2016, Comerica 
was also required to maintain a minimum capital conservation buffer of 0.625% in order to avoid restrictions on capital distributions 
and discretionary bonuses. The minimum required capital conservation buffer gradually increases to 2.5% in 2019. At December 31, 
2016, Comerica met all requirements, with CET1, Tier 1 and total capital equal to 11.09%, 11.09% and 13.27% of its total risk-
weighted assets, respectively, and a capital conservation buffer of 5.09% of its total risk-weighted assets.

Comerica is also required to maintain a minimum “leverage ratio” (Tier 1 capital to non-risk-adjusted total assets) of 
4%. Comerica's leverage ratio of 10.18% at December 31, 2016 reflects the nature of Comerica's balance sheet and demonstrates 
a commitment to capital adequacy. At December 31, 2016, Comerica Bank had CET1, Tier 1 and total capital equal to 10.51%,
5

10.51% and 12.40% of its total risk-weighted assets, respectively, a capital conservation buffer of 4.40% of its total risk-weighted 
assets, and a leverage ratio of 9.65%.

Additional information on the calculation of Comerica and its bank subsidiaries' CET1, Tier 1 capital, total capital and 
risk-weighted assets is set forth in Note 20 of the Notes to Consolidated Financial Statements located on pages F-99 through F-100
of the Financial Section of this report. Additional information on the timing and nature of the Basel III capital requirements is set 
forth below, under "Basel III: Regulatory Capital and Liquidity Regime."

FDIC Insurance Assessments

The FDIC Deposit Insurance Fund (“DIF”) provides insurance coverage for certain deposits. Comerica's subsidiary banks 
are subject to FDIC deposit insurance assessments to maintain the DIF. The FDIC imposes a risk-based deposit premium assessment 
system, which was amended pursuant to the Federal Deposit Insurance Reform Act of 2005 and further amended by the Dodd-
Frank Act. The  Dodd-Frank Act  also  increased  the  DIF's  minimum  reserve  ratio  and  permanently  increased  general  deposit 
insurance coverage from $100,000 to $250,000. Under the risk-based deposit premium assessment system, the assessment rates 
for an insured depository institution are determined by an assessment rate calculator, which is based on a number of elements to 
measure the risk each institution poses to the DIF. The assessment rate is applied to total average assets less tangible equity. Under 
the current system, premiums are assessed quarterly and could increase if, for example, criticized loans and/or other higher risk 
assets increase or balance sheet liquidity decreases. For 2016, Comerica’s FDIC insurance expense totaled $54 million, including 
the surcharge described below. 

Effective July 1, 2016, the FDIC issued a final rule in order to implement section 334 of the Dodd-Frank Act (§334), 
which requires the FDIC to (1) raise the minimum reserve ratio for the DIF to 1.35 percent, from 1.15 percent, (2) assess premiums 
on banks to reach the 1.35 percent goal by September 30, 2020, and (3) offset the effect of the increase in the minimum reserve 
ratio on insured depository institutions with assets of less than $10 billion. The final rule imposes a surcharge on large banks, to 
be assessed over a period of eight quarters, as a means to implement §334. Comerica is subject to the surcharge assessment. If 
this surcharge is insufficient to increase the reserve ratio to 1.35 percent by December 31, 2018, a one-time shortfall assessment 
will be imposed on institutions with total consolidated assets of $10 billion or more on March 31, 2019. Management currently 
estimates that, based on the final rule, FDIC expense will increase by a total of approximately $20 million over the eight-quarter 
period that began July 1, 2016. 

Enforcement Powers of Federal and State Banking Agencies

The FRB and other federal and state banking agencies have broad enforcement powers, including, without limitation, 
and as prescribed to each agency by applicable law, the power to terminate deposit insurance, impose substantial fines and other 
civil penalties and appoint a conservator or receiver. Failure to comply with applicable laws or regulations could subject Comerica 
or its banking subsidiaries, as well as officers and directors of these organizations, to administrative sanctions and potentially 
substantial civil and criminal penalties.

The Dodd-Frank Wall Street Reform and Consumer Protection Act and Recent Legislative and Regulatory Developments

The financial crisis led to significant changes in the legislative and regulatory landscape of the financial services industry, 
including the overhaul of that landscape with the passage of the Dodd-Frank Act, which was signed into law on July 21, 2010. 
Provided below is an overview of key elements of the Dodd-Frank Act relevant to Comerica, as well as recent legislative and 
regulatory developments. The estimates of the impact on Comerica discussed below are based on information currently available 
and, if applicable, are subject to change until final rulemaking is complete.

Incentive-Based Compensation.  In June 2010, the FRB, OCC and FDIC issued comprehensive final guidance on incentive 
compensation policies intended to ensure that the incentive compensation policies of banking organizations do not undermine the 
safety and soundness of such organizations by encouraging excessive risk-taking. The guidance, which covers senior executives 
as well as other employees who, either individually or as part of a group, have the ability to expose the banking organization to 
material amounts of risk, is based upon the key principles that a banking organization's incentive compensation arrangements (i) 
should provide employees incentives that appropriately balance risk and financial results in a manner that does not encourage 
employees to expose their organizations to imprudent risk; (ii) should be compatible with effective controls and risk-management; 
and (iii) should be supported by strong corporate governance, including active and effective oversight by the organization's board 
of directors. Banking organizations are expected to review regularly their incentive compensation arrangements based on these 
three principles. Where there are deficiencies in the incentive compensation arrangements, they should be promptly addressed. 
Enforcement actions may be taken against a banking organization if its incentive compensation arrangements, or related risk-
management control or governance processes, pose a risk to the organization's safety and soundness, particularly if the organization 
is not taking prompt and effective measures to correct the deficiencies. Comerica is subject to this final guidance and, similar to 
other large banking organizations, has been subject to a continuing review of incentive compensation policies and practices by 
representatives of the FRB, the Federal Reserve Bank of Dallas and the Texas Department of Banking since 2011. As part of that 
review, Comerica has undertaken a thorough analysis of all the incentive compensation programs throughout the organization, the 

6

 
 
individuals covered by each plan and the risks inherent in each plan’s design and implementation. Comerica has determined that 
risks arising from employee compensation plans are not reasonably likely to have a material adverse effect on Comerica. Further, 
it is the Company’s intent to continue to evolve our processes going forward by monitoring regulations and best practices for 
sound incentive compensation.

In  2016,  the  FRB,  OCC  and  several  other  federal  financial  regulators  revised  and  re-proposed  rules  to  implement 
Section 956 of the Dodd-Frank Act. The rules were first proposed in 2011. Section 956 directed regulators to jointly prescribe 
regulations or guidelines prohibiting incentive-based payment arrangements, or any feature of any such arrangement, at covered 
financial institutions that encourage inappropriate risks by providing excessive compensation or that could lead to a material 
financial loss. This proposal supplements the final guidance issued by the banking agencies in June 2010. Consistent with the 
Dodd-Frank Act, the proposed rule would not apply to institutions with total consolidated assets of less than $1 billion, and would 
impose heightened standards for institutions with $50 billion or more in total consolidated assets, which includes Comerica. For 
these  larger  institutions,  the  proposed  rule  would  require  the  deferral  of  at  least  40  percent  of  incentive-based  payments  for 
designated executives and significant risk-takers who individually have the ability to expose the institution to possible losses that 
are substantial in relation to the institution's size, capital or overall risk tolerance. Moreover, incentive-based compensation of 
these individuals would be subject to potential clawback for seven years following vesting. Further, the rule imposes enhanced 
risk management controls and governance and internal policy and procedure requirements with respect to incentive compensation. 
Comerica is monitoring the development of this rule.

Basel III: Regulatory Capital and Liquidity Regime.  In December 2010, the Basel Committee on Banking Supervision 
(the “Basel Committee”) issued a framework for strengthening international capital and liquidity regulation (“Basel III”). In July 
2013, U.S. banking regulators issued a final rule for the U.S. adoption of the Basel III regulatory capital framework. Basel III 
includes a more stringent definition of capital and introduces a new common equity Tier 1 ("CET1") capital requirement; sets 
forth two comprehensive methodologies for calculating risk-weighted assets ("RWA"), a standardized approach and an advanced 
approach; introduces two new capital buffers, a conservation buffer and a countercyclical buffer (applicable to advanced approach 
entities); establishes a new supplemental leverage ratio (applicable to advanced approach entities); and sets out minimum capital 
ratios and overall capital adequacy standards. As a banking organization subject to the standardized approach, the rules were 
effective for Comerica on January 1, 2015. Certain deductions and adjustments to regulatory capital (primarily related to intangible 
assets  and  surplus  Tier  2  capital  minority  interest)  phase  in  and  will  be  fully  implemented  on  January  1,  2018.  The  capital 
conservation buffer phases in at 0.625 percent beginning on January 1, 2016 and ultimately increases to 2.5 percent on January 
1, 2019. Comerica is not subject to the countercyclical buffer or the supplemental leverage ratio.

Comerica's December 31, 2016 CET1 and Tier 1 ratios were both 11.09 percent. Comerica's December 31, 2016 CET1 

and Tier 1 capital ratios exceed the minimum required by the final rule (4.5 percent and 6 percent, respectively). 

On September 3, 2014, U.S. banking regulators adopted the Liquidity Coverage Ratio ("LCR") rule, which set for U.S. 
banks the minimum liquidity measure established under the Basel III liquidity framework. Under the final rule, Comerica is subject 
to a modified LCR standard, which requires a financial institution to hold a minimum level of high-quality, liquid assets ("HQLA") 
to fully cover modified net cash outflows under a 30-day systematic liquidity stress scenario. The rule was effective for Comerica 
on January 1, 2016. During the transition year, 2016, Comerica was required to maintain a minimum LCR of 90 percent. Beginning 
January 1, 2017, and thereafter, the minimum required LCR will be 100 percent. At each quarter-end in 2016, Comerica was in 
compliance with the fully phased-in LCR requirement, plus a buffer. 

In  the  second  quarter  2016,  U.S.  banking  regulators  issued  a  notice  of  proposed  rulemaking  (the  proposed  rule) 
implementing a second quantitative liquidity requirement in the U.S. generally consistent with the Net Stable Funding Ratio 
(NSFR) minimum liquidity measure established under the Basel III liquidity framework. Under the proposed rule, Comerica will 
be subject to a modified NSFR standard effective January 1, 2018, which requires a financial institution to hold a minimum level 
of available longer-term, stable sources of funding to fully cover a modified amount of required longer-term stable funding, over 
a one-year period. Comerica does not currently expect the proposed rule to have a material impact on its liquidity needs.

Interchange Fees.  On July 20, 2011, the FRB published final rules (Regulation II) pursuant to the Dodd-Frank Act 
establishing the maximum permissible interchange fee that an issuer may receive for an electronic debit transaction as the sum of 
21  cents  per  transaction  and  5  basis  points  multiplied  by  the  value  of  the  transaction  and  prohibiting  network  exclusivity 
arrangements and routing restrictions. Comerica is subject to the final rules.

Supervision and Regulation Assessment.  Section 318 of the Dodd-Frank Act authorizes the federal banking agencies to 
assess fees against bank holding companies with total consolidated assets in excess of $50 billion equal to the expenses necessary 
or appropriate in order to carry out their supervision and regulation of those companies. Comerica expensed $1.9 million for 2016, 
which will be assessed in the first quarter 2017. 

The Volcker Rule. The federal banking agencies and the SEC published approved joint final regulations to implement 
the Volcker Rule on December 10, 2013. The Volcker Rule generally prohibits banking entities from engaging in proprietary 
trading and from owning and sponsoring "covered funds" (e.g. hedge funds and private equity funds). The final regulations adopt 

7

 
 
a multi-faceted approach to implementing the Volcker Rule prohibitions that relies on: (i) detailed descriptions of prohibited and 
permitted activities; (ii) detailed compliance requirements; and (iii) for banking entities with large volumes of trading activity, 
detailed quantitative analysis and reporting obligations. In addition to rules implementing the core prohibitions and exemptions 
(e.g. underwriting, market-making related activities, risk-mitigating hedging and trading in certain government obligations) of the 
Volcker  Rule,  the  regulations  also  include  two  appendices  devoted  to  record-keeping  and  reporting  requirements,  including 
numerous quantitative data reporting obligations for banking entities with significant trading activities (Appendix A) and enhanced 
compliance requirements for banking entities with significant trading or covered fund activities (Appendix B). The final rule was 
effective April 1, 2014. The Volcker Rule generally required full compliance with the new restrictions by July 21, 2015; however, 
the FRB has extended the conformance period to July 21, 2017 for covered funds that were in place prior to December 31, 2013. 
Comerica is currently in compliance with the effective aspect of the Volcker Rule and expects to meet the final requirements 
adopted  by  regulators  within  the  applicable  regulatory  timelines. Additional  information  on  Comerica's  portfolio  of  indirect 
(through  funds)  private  equity  and  venture  capital  investments  is  set  forth  in  Note 1  of  the  Notes  to  Consolidated  Financial 
Statements located on page F-52 of the Financial Section of this report. 

Annual Capital Plans and Stress Tests. Comerica is subject to the FRB’s annual Comprehensive Capital Analysis and 
Review (CCAR) process, as well as the Dodd-Frank Act Stress Testing (DFAST) requirements. As part of the CCAR process, the 
FRB undertakes a supervisory assessment of the capital adequacy of bank holding companies (BHCs), including Comerica, that 
have $50 billion or more in total consolidated assets. This capital adequacy assessment is based on a review of a comprehensive 
capital plan submitted by each participating BHC to the FRB that describes the company’s planned capital actions during the nine 
quarter review period, as well as the results of stress tests conducted by both the company and the FRB under different hypothetical 
macro-economic scenarios, including a supervisory baseline and an adverse and a severely adverse scenario provided by the FRB. 
The FRB reviews both quantitative factors (such as projected capital ratios under a hypothetical stress scenario) and qualitative 
factors (such as the strength of the company's capital planning process). On January 30, 2017, the FRB issued a final rule stating 
that going forward, large and noncomplex firms, such as Comerica, would remain subject to a quantitative assessment in CCAR, 
but  would  no  longer  be  subject  to  the  qualitative  assessment  as  part  of  CCAR;  instead,  the  qualitative  assessment  would  be 
conducted through the regular ongoing supervisory review process.

After completing its review, the FRB may object or not object to the company’s proposed capital actions, such as plans 
to pay or increase common stock dividends, reinstate or increase common equity repurchase programs, or issue or redeem preferred 
stock or other regulatory capital instruments. In connection with the 2016 CCAR, Comerica submitted its 2016 capital plan to the 
FRB on April 4, 2016; on June 23, 2016, Comerica and the FRB released the revenue, loss and capital results from the annual 
stress testing exercises and on June 29, 2016, Comerica announced that the FRB had completed its CCAR 2016 capital plan review 
and did not object to the capital plan or capital distributions contemplated in the plan for the four-quarter period commencing in 
the third quarter 2016 and ending in the second quarter 2017. Comerica plans to submit its CCAR 2017 capital plan to the FRB, 
consistent with supervisory guidance (SR 15-19), in April 2017 and expects to receive the results of the FRB's review of the plan 
in June 2017 and to release its company-run stress tests results in June or July 2017. 

FRB regulations also required that Comerica and other large bank holding companies conduct a separate mid-year stress 
test using financial data as of June 30th and three company-derived macro-economic scenarios (base, adverse and severely adverse) 
and publish a summary of the results under the severely adverse scenario. On October 20, 2016, Comerica released the results of 
its company-run mid-year stress tests. Stress test results are available in the Investor Relations section of Comerica's website at 
investor.comerica.com, on the “Regulatory Disclosures” page under "Financial Reports." 

Enhanced Prudential Requirements.  The Dodd-Frank Act created the Financial Stability Oversight Council (“FSOC”) 
to coordinate efforts of the primary U.S. financial regulatory agencies in establishing regulations to address financial stability 
concerns and to make recommendations to the FRB as to enhanced prudential standards that must apply to large, interconnected 
bank holding companies and nonbank financial companies supervised by the FRB under the Dodd-Frank Act, including capital, 
leverage, liquidity and risk management requirements.

On  February  18,  2014,  the  FRB  issued  its  final  regulations  to  implement  the  enhanced  prudential  and  supervisory 
requirements  mandated  by  the  Dodd-Frank  Act.  The  final  regulations  address  enhanced  risk-based  capital  and  leverage 
requirements, enhanced liquidity requirements, enhanced risk management and risk committee requirements, single-counterparty 
credit limits, semiannual stress tests (as described above under "Annual Capital Plans and Stress Tests"), and a debt-to-equity limit 
for companies determined to pose a grave threat to financial stability. They are intended to allow regulators to more effectively 
supervise large bank holding companies and nonbank financial firms whose failure could impact the stability of the US financial 
system, and generally build on existing US and international regulatory guidance. The rule also takes a multi-stage or phased 
approach to many of the requirements (such as the capital and liquidity requirements). Most of these requirements apply to Comerica 
because it has consolidated assets of more than $50 billion. Comerica has or will implement all requirements of the new rules 
within regulatory timelines.

Resolution  (Living Will)  Plans.    Section  165(d)  of  the  Dodd-Frank Act  requires  bank  holding  companies  with  total 
consolidated assets of $50 billion or more (“covered companies”) to prepare and submit to the federal banking agencies (e.g., FRB 

8

 
and FDIC) a plan for their rapid and orderly resolution under the U.S. Bankruptcy Code. Covered companies, such as Comerica, 
with less than $100 billion in total nonbank assets were required to submit their initial plans by December 31, 2013. In addition, 
Section 165(d) requires FDIC-insured depository institutions (like Comerica Bank) with assets of $50 billion or more to develop, 
maintain, and periodically submit plans outlining how the FDIC would resolve it through the FDIC's resolution powers under the 
Federal Deposit Insurance Act. The federal banking agencies have issued rules to implement these requirements. In addition, those 
rules require the filing of annual updates to the plans. Both Comerica and Comerica Bank filed their respective initial and updated 
resolution plans by the required due dates, and will submit their 2017 resolution plans prior to December 31, 2017. 

Section 611 and Title VII of the Dodd-Frank Act.  Section 611 of the Dodd-Frank Act prohibits a state bank from engaging 
in derivative transactions unless the lending limit laws of the state in which the bank is chartered take into consideration exposure 
to derivatives. Section 611 does not provide how state lending limit laws must factor in derivatives. The Texas Finance Commission 
has adopted an administrative rule meeting the requirements of Section 611. Comerica Bank's policy is designed to comply with 
the Texas rule. Accordingly, Comerica Bank may engage in derivative transactions, as permitted by applicable law.

Title  VII  of  the  Dodd-Frank Act  establishes  a  comprehensive  framework  for  over-the-counter  (“OTC”)  derivatives 
transactions. The structure for derivatives set forth in the Dodd-Frank Act is intended to promote, among other things, exchange 
trading and centralized clearing of swaps and security-based swaps, as well as greater transparency in the derivatives markets and 
enhanced monitoring of the entities that use these markets. In this regard, the CFTC and SEC have issued several regulatory 
proposals, some of which are now effective or will become effective in 2017. Most of the requirements did not impact Comerica 
since the Bank does not meet the definition of swap dealer nor is it a “major swap participant.”

On October 13, 2016, the CFTC issued an Order setting the de minimis threshold at $8 billion through December 31, 
2018 with respect to the de minimis exception to the swap dealer definition.  In taking this action, the de minimis threshold will 
not decrease to $3 billion on December 31, 2017, as initially proposed.  At this time, Comerica will continue to track its dealing 
activity.

The  variation margin requirements for non-centrally cleared swaps and security-based swaps are effective for Comerica 
on March 31, 2017.  The variation margin requirements were issued for the purpose of ensuring safety and soundness of swap 
trading in light of the risk to the financial system associated with non-cleared swaps activity.  Comerica is currently working 
toward meeting compliance with the variation margin requirements.

Consumer Finance Regulations.  The Dodd-Frank Act made several changes to consumer finance laws and regulations. 
It contained provisions that have weakened the federal preemption rules applicable for national banks and give state attorneys 
general the ability to enforce federal consumer protection laws. Additionally, the Dodd-Frank Act created the Consumer Financial 
Protection Bureau (“CFPB“), which has a broad rule-making authority for a wide range of consumer protection laws that apply 
to all banks and savings institutions, including the authority to prohibit “unfair, deceptive or abusive” acts and practices, and 
possesses examination and enforcement authority over all banks and savings institutions with more than $10 billion in assets. In 
this regard, the CFPB has commenced issuing several new rules to implement various provisions of the Dodd-Frank Act that were 
specifically identified as being enforced by the CFPB, as well as those specified for supervisory and enforcement authority for 
very large depository institutions and non-depository (nonbank) entities. Comerica is subject to CFPB foreign remittance rules 
and home mortgage lending rules, in addition to certain other CFPB rules.

The foreign remittance rules fall under Section 1073 of the Dodd-Frank Act. The CFPB issued new regulations amending 
Regulation E, which implements the Electronic Fund Transfer Act, effective October 28, 2013. The regulations were designed to 
provide protections to consumers who transfer funds to recipients located in countries outside the United States (customer foreign 
remittance transfers). In general, the regulation requires remittance transfer providers, such as Comerica, to disclose to a consumer 
the exchange rate, fees, and amount to be received by the recipient when the consumer sends a remittance transfer. Although 
Comerica had implemented the model disclosures provided in Appendix A to the final rule, on September 18, 2014, the CFPB 
extended the compliance exception period for the rule's new disclosure requirements to July 21, 2020. 

On October 5, 2016, effective October 1, 2017, the CFPB issued final regulations establishing new consumer protections 
and disclosure requirements on prepaid accounts. The final rule’s definition of prepaid accounts specifically includes payroll card 
accounts and government benefit accounts. It also includes cards that are not linked to a deposit account to conduct person-to- 
person (P2P) transfers.  The regulations include (i) the provision of either periodic statements or free online account information 
access; (ii) new account error and unauthorized transaction rights; (iii) new “Know Before You Choose” prepaid account disclosures; 
(iv) public disclosure of account agreements for prepaid accounts and (v) credit protection for linked credit accounts. Additionally, 
the final rule regulates overdraft credit features that may be offered in conjunction with prepaid accounts.

Comerica has positioned itself to be in compliance with the new requirements.

Truth in Lending Act (“TILA”) and Real Estate Settlement Procedures Act (“RESPA”).  In November 2013, the CFPB 
issued a rule implementing new TILA RESPA Integrated Disclosures (“TRID”) to replace the initial Truth-in-Lending disclosure 
and Good Faith Estimate for most closed-end consumer mortgage loans. The effective date was October 3, 2015. Significant 

9

changes in TRID include: (1) expansion of the scope of loans that require RESPA early disclosures, including bridge loans, vacant 
land loans, and construction loans; (2) changes and additions to “waiting period” requirements to close a loan; (3) reduced tolerances 
for estimated fees and (4) the lender, rather than the closing agent, is responsible for providing final disclosures. Although Comerica 
outsources most of its consumer mortgage loans, consumer construction financing has been suspended. This regulation has also 
resulted in a suspension of consumer bridge loan financing. Such financing has not been a significant business for Comerica. 

Home  Mortgage  Disclosure Act  (HMDA),  Equal  Credit  Opportunity Act  (ECOA)  and  Uniform  Residential  Loan 
Application (URLA).  A revised and redesigned URLA was approved by the CFPB on September 23, 2016. The official approval 
expands the Home Mortgage Disclosure Act information about Ethnicity and Race that can be collected from January 1, 2017 
through December 31, 2017. Regulation C, as amended by the final rule published in the Federal Register at 80 FR 66127 on 
October 28, 2015 (2015 HMDA final rule), will require financial institutions to permit applicants to self-identify using disaggregated 
ethnic and racial categories beginning January 1, 2018 in conformance with the 2016 URLA. Most consumer-purpose transactions, 
including closed-end home-equity loans, home-equity lines of credit and reverse mortgages, are subject to the regulation. Most 
commercial-purpose transactions (i.e., loans or lines of credit not for personal, family, or household purposes) are subject to the 
regulation only if they are for the purpose of home purchase, home improvement, or refinancing. The final rule excludes from 
coverage home improvement loans that are not secured by a dwelling (i.e., home improvement loans that are unsecured or that 
are secured by some other type of collateral) and all agricultural-purpose loans and lines of credit. Comerica is monitoring and 
implementing changes as required.

FDIC Guidance on Brokered Deposits.  On January 5, 2015, the FDIC issued guidance in the form of “Frequently Asked 
Questions” to promote consistency by insured depository institutions in identifying, accepting, and reporting brokered deposits.   
On November 13, 2015, the FDIC issued proposed updates to the FAQs.  All insured depository institutions (including those that 
are well capitalized) must report brokered deposits in their Consolidated Reports of Condition and Income (Call Reports).  Comerica 
has evaluated the impact of these FAQs, including the proposed updates, to various business units throughout the organization. 
The FAQs had only a nominal impact.  

Flood Insurance Reform.  The Biggert-Waters Flood Insurance Reform Act of 2012 (“Biggert-Waters Act”), as amended 
by the Homeowner Flood Insurance Affordability Act of 2014, modified the National Flood Insurance Program by: (i) increasing 
the maximum civil penalty for Flood Disaster Protection Act violations to $2,000 and eliminating the annual penalty cap; (ii) 
requiring certain lenders (including Comerica) to escrow premiums and fees for flood insurance on residential improved real 
estate; (iii) directing lenders to accept private flood insurance and to notify borrowers of its availability; (iv) amending the force 
placement requirement provisions; and (v) permitting lenders to charge borrowers costs for lapses in or insufficient coverage. 
These requirements will impact Comerica loans and extensions of credit secured with residential improved real estate. The civil 
penalty and force placed insurance provisions were effective immediately.  The escrow provisions became effective on January 
1, 2016.

On October 31, 2016, the federal agencies issued a Joint Notice of Proposed Rulemaking concerning the private flood 
insurance  rules  with  request  for  additional  public  comments  due  on  January  6,  2017.  Comerica  will  continue  to  monitor  the 
development and implementation of the private flood insurance rules.

Future Legislation and Regulatory Measures

The  environment  in  which  financial  institutions  have  operated  since  the  financial  crisis,  including  legislative  and 
regulatory changes affecting capital, liquidity, supervision, permissible activities, corporate governance and compensation, and 
changes in fiscal policy, may have long-term effects on the business model and profitability of financial institutions that cannot 
be foreseen. Further, it is too soon for Comerica to predict what legislative or regulatory changes may occur as a result of the 
recent change in the U.S. presidential administration, or, if changes occur, the ultimate effect they would have upon the financial 
condition or results of operations of Comerica.

UNDERWRITING APPROACH

The loan portfolio is a primary source of profitability and risk, so proper loan underwriting is critical to Comerica's long-
term financial success. Comerica extends credit to businesses, individuals and public entities based on sound lending principles 
and consistent with prudent banking practice. During the loan underwriting process, a qualitative and quantitative analysis of 
potential  credit  facilities  is  performed,  and  the  credit  risks  associated  with  each  relationship  are  evaluated.  Important  factors 
considered as part of the underwriting process for new loans and loan renewals include:

• 

• 

• 

People: Including the competence, integrity and succession planning of customers.

Purpose: The legal, logical and productive purposes of the credit facility.

Payment: Including the source, timing and probability of payment.

10

 
 
 
• 

• 

Protection: Including obtaining alternative sources of repayment, securing the loan, as appropriate, with collateral 
and/or third-party guarantees and ensuring appropriate legal documentation is obtained.

Perspective: The risk/reward relationship and pricing elements (cost of funds; servicing costs; time value of 
money; credit risk).

Comerica prices credit facilities to reflect risk, the related costs and the expected return, while maintaining competitiveness 
with other financial institutions. Loans with variable and fixed rates are underwritten to achieve expected risk-adjusted returns on 
the credit facilities and for the full relationship including the borrower's ability to repay the principal and interest based on such 
rates.

Credit Administration 

Comerica maintains a Credit Administration Department (“Credit Administration”) which is responsible for the oversight 
and monitoring of our loan portfolio. Credit Administration assists with underwriting by providing objective financial analysis, 
including an assessment of the borrower's business model, balance sheet, cash flow and collateral. Each borrower relationship is 
assigned an internal risk rating by Credit Administration. Further, Credit Administration updates the assigned internal risk rating 
for every borrower relationship as new information becomes available, either as a result of periodic reviews of the credit quality 
or as a result of a change in borrower performance. The goal of the internal risk rating framework is to improve Comerica's risk 
management capability, including its ability to identify and manage changes in the credit risk profile of its portfolio, predict future 
losses and price the loans appropriately for risk.

Credit Policy

Comerica maintains a comprehensive set of credit policies. Comerica's credit policies provide individual relationship 
managers, as well as loan committees, approval authorities based on our internal risk rating system and establish maximum exposure 
limits based on risk ratings and Comerica's legal lending limit. Credit Administration, in conjunction with the businesses units, 
monitors compliance with the credit policies and modifies the existing policies as necessary. New or modified policies/guidelines 
require approval by the Strategic Credit Committee, chaired by Comerica's Chief Credit Officer and comprising senior credit, 
market and risk management executives.

Commercial Loan Portfolio

Commercial loans are underwritten using a comprehensive analysis of the borrower's operations. The underwriting process 

includes an analysis of some or all of the factors listed below:

• 

• 

• 

• 

• 

• 

• 

• 

The borrower's business model.

Periodic review of financial statements including financial statements audited by an independent certified public 
accountant when appropriate.

The pro-forma financial condition including financial projections.

The borrower's sources and uses of funds.

The borrower's debt service capacity.

The guarantor's financial strength.

A comprehensive review of the quality and value of collateral, including independent third-party appraisals of 
machinery and equipment and commercial real estate, as appropriate, to determine the advance rates.

Physical inspection of collateral and audits of receivables, as appropriate.

For additional information specific to our Energy loan portfolio, please see the caption, “Energy Lending” on pages F-30 

through F-31 of the Financial Section of this report.

Commercial Real Estate (CRE) Loan Portfolio

Comerica's CRE loan portfolio consists of real estate construction and commercial mortgage loans and includes both 
loans to real estate developers and loans secured by owner-occupied real estate. Comerica's CRE loan underwriting policies are 
consistent with the approach described above and provide maximum loan-to-value ratios that limit the size of a loan to a maximum 
percentage of the value of the real estate collateral securing the loan. The loan-to-value percentage varies by the type of collateral 
and is limited by advance rates established by our regulators. Our loan-to-value limitations are, in certain cases, more restrictive 
than those required by regulators and are influenced by other risk factors such as the financial strength of the borrower or guarantor, 
the equity provided to the project and the viability of the project itself. CRE loans generally require cash equity. CRE loans are 
normally originated with full recourse or limited recourse to all principals and owners. There are limitations to the size of a single 
project loan and to the aggregate dollar exposure to a single guarantor.

11

 
 
Consumer and Residential Mortgage Loan Portfolios

Comerica's consumer and residential mortgage loans are originated consistent with the underwriting approach described 
above, but also includes an assessment of each borrower's personal financial condition, including a review of credit reports and 
related FICO scores (a type of credit score used to assess an applicant's credit risk) and verification of income and assets. Comerica 
does not originate subprime loans. Although a standard industry definition for subprime loans (including subprime mortgage loans) 
does not exist, Comerica defines subprime loans as specific product offerings for higher risk borrowers, including individuals with 
one or a combination of high credit risk factors. These credit factors include low FICO scores, poor patterns of payment history, 
high debt-to-income ratios and elevated loan-to-value. We generally consider subprime FICO scores to be those below 620 on a 
secured basis (excluding loans with cash or near-cash collateral and adequate income to make payments) and below 660 for 
unsecured loans. Residential mortgage loans retained in the portfolio are largely relationship based. The remaining loans are 
typically eligible to be sold on the secondary market. Adjustable rate loans are limited to standard conventional loan programs. 

EMPLOYEES

As of December 31, 2016, Comerica and its subsidiaries had 7,659 full-time and 490 part-time employees.

AVAILABLE INFORMATION

Comerica maintains an Internet website at www.comerica.com where the Annual Report on Form 10-K, Quarterly Reports 
on Form 10-Q, Current Reports on Form 8-K and all amendments to those reports are available without charge, as soon as reasonably 
practicable after those reports are filed with or furnished to the SEC. The Code of Business Conduct and Ethics for Employees, 
the Code of Business Conduct and Ethics for Members of the Board of Directors and the Senior Financial Officer Code of Ethics 
adopted by Comerica are also available on the Internet website and are available in print to any shareholder who requests them. 
Such requests should be made in writing to the Corporate Secretary at Comerica Incorporated, Comerica Bank Tower, 1717 Main 
Street, MC 6404, Dallas, Texas 75201. 

In addition, pursuant to regulations adopted by the FRB, Comerica makes additional regulatory capital-related disclosures. 
Under these regulations, Comerica satisfies a portion of these requirements through postings on its website, and Comerica has 
done so and expects to continue to do so without also providing disclosure of this information through filings with the SEC. 

Where we have included web addresses in this report, such as our web address and the web address of the SEC, we have 
included those web addresses as inactive textual references only. Except as specifically incorporated by reference into this report, 
information on those websites is not part hereof. 

Item 1A.  Risk Factors.

This report includes forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. In 
addition, Comerica may make other written and oral communications from time to time that contain such statements. All statements 
regarding Comerica's expected financial position, strategies and growth prospects and general economic conditions Comerica 
expects  to  exist  in  the  future  are  forward-looking  statements.  The  words,  “anticipates,”  “believes,”  “contemplates,”  “feels,” 
“expects,” “estimates,” “seeks,” “strives,” “plans,” “intends,” “outlook,” “forecast,” “position,” “target,” “mission,” “assume,” 
“achievable,”  “potential,”  “strategy,”  “goal,”  “aspiration,”  "opportunity,"  "initiative,"  “outcome,”  “continue,”  “remain,” 
“maintain,” "on course," “trend,” “objective,” "looks forward," "projects," "models" and variations of such words and similar 
expressions, or future or conditional verbs such as “will,” “would,” “should,” “could,” “might,” “can,” “may” or similar expressions, 
as they relate to Comerica or its management, are intended to identify forward-looking statements.

Comerica cautions that forward-looking statements are subject to numerous assumptions, risks and uncertainties, which 
change over time. Forward-looking statements speak only as of the date the statement is made, and Comerica does not undertake 
to update forward-looking statements to reflect facts, circumstances, assumptions or events that occur after the date the forward-
looking statements are made. Actual results could differ materially from those anticipated in forward-looking statements and future 
results could differ materially from historical performance.

In addition to factors mentioned elsewhere in this report or previously disclosed in Comerica's SEC reports (accessible 
on the SEC's website at www.sec.gov or on Comerica's website at www.comerica.com), the factors contained below, among others, 
could cause actual results to differ materially from forward-looking statements, and future results could differ materially from 
historical performance.

• 

General political, economic or industry conditions, either domestically or internationally, may be less favorable 
than expected.

Local, domestic, and international events including economic, financial market, political and industry specific conditions 
affect  the  financial  services  industry,  directly  and  indirectly.  Conditions  such  as  or  related  to  inflation,  recession, 
unemployment, volatile interest rates, international conflicts and other factors, such as real estate values, energy prices, 

12

state and local municipal budget deficits, government spending and the U.S. national debt, outside of our control may, 
directly and indirectly, adversely affect Comerica. 

• 

Governmental monetary and fiscal policies may adversely affect the financial services industry, and therefore 
impact Comerica's financial condition and results of operations.

Monetary and fiscal policies of various governmental and regulatory agencies, in particular the FRB, affect the financial 
services industry, directly and indirectly. The FRB regulates the supply of money and credit in the U.S. and its monetary 
and fiscal policies determine in a large part Comerica's cost of funds for lending and investing and the return that can be 
earned on such loans and investments. Changes in such policies, including changes in interest rates, will influence the 
origination of loans, the value of investments, the generation of deposits and the rates received on loans and investment 
securities and paid on deposits. Changes in monetary and fiscal policies are beyond Comerica's control and difficult to 
predict. Comerica's financial condition and results of operations could be materially adversely impacted by changes in 
governmental monetary and fiscal policies.

• 

Proposed revenue enhancements and efficiency improvements may not be achieved.

In July 2016 Comerica announced the implementation of its efficiency and revenue initiative, GEAR Up (the "initiative") 
and related financial targets. There may be changes in the scope or assumptions underlying the initiative, delays in the 
anticipated timing of activities related to the initiative and higher than expected or unanticipated costs to implement them, 
and some benefits may not be fully achieved. As well, even if the initiative is successful, many factors can influence the 
amount of core noninterest expenses, some of which are not wholly in our control, including changing regulations, benefits 
and health care costs, technology and cybersecurity investments, outside processing expenses and litigation. 

Furthermore, the implementation of the initiative may have unintended impacts on Comerica's ability to attract and retain 
business, customers and employees, and could result in disruptions to systems, processes, controls and procedures. Any 
revenue enhancement ideas may not be successful in the marketplace. Accordingly, Comerica's results of operations and 
profitability may be negatively impacted, making it less competitive and potentially causing a loss of market share. 
Additionally, Comerica's future performance is subject to the various risks inherent to its business and operations. 

• 

Comerica must maintain adequate sources of funding and liquidity to meet regulatory expectations, support its 
operations and fund outstanding liabilities.

Comerica’s  liquidity  and  ability  to  fund  and  run  its  business  could  be  materially  adversely  affected  by  a  variety  of 
conditions and factors, including financial and credit market disruptions and volatility or a lack of market or customer 
confidence in financial markets in general, which may result in a loss of customer deposits or outflows of cash or collateral 
and/or ability to access capital markets on favorable terms. 

Other conditions and factors that could materially adversely affect Comerica’s liquidity and funding include a lack of 
market or customer confidence in, or negative news about, Comerica or the financial services industry generally which 
also may result in a loss of deposits and/or negatively affect the ability to access the capital markets; the loss of customer 
deposits to alternative investments; counterparty availability; interest rate fluctuations; general economic conditions; and 
the legal, regulatory, accounting and tax environments governing our funding transactions. Many of the above conditions 
and factors may be caused by events over which Comerica has little or no control. There can be no assurance that significant 
disruption and volatility in the financial markets will not occur in the future. Further, Comerica's customers may be 
adversely impacted by such conditions, which could have a negative impact on Comerica's business, financial condition 
and results of operations.

In September 2014, U.S. banking regulators issued a final rule implementing a quantitative liquidity requirement in the 
U.S. generally consistent with the Liquidity Coverage Ratio ("LCR") minimum liquidity measure established under the 
Basel III liquidity framework. Under the final rule, Comerica is subject to a modified LCR standard, which requires a 
financial institution to hold a minimum level of high-quality, liquid assets to fully cover modified net cash outflows under 
a 30-day systematic liquidity stress scenario. The rule was effective for Comerica on January 1, 2016. During the transition 
year, 2016, Comerica was required to maintain a minimum LCR of 90 percent. Beginning January 1, 2017, and thereafter, 
the minimum required LCR will be 100 percent. For more information regarding the LCR, please see the “Supervision 
and Regulation” section of this report. The inability to access capital markets funding sources as needed could adversely 
impact our level of regulatory-qualifying capital and ability to continue to comply with the LCR framework. 

Further, if Comerica is unable to continue to fund assets through customer bank deposits or access funding sources on 
favorable terms, or if Comerica suffers an increase in borrowing costs or otherwise fails to manage liquidity effectively, 
Comerica’s liquidity, operating margins, financial condition and results of operations may be materially adversely affected. 

13

• 

Compliance with more stringent capital and liquidity requirements may adversely affect Comerica.

Comerica is required to satisfy stringent capital and liquidity standards, including annual and mid-year stress testing and 
quantitative standards for liquidity management, as a result of capital and liquidity requirements in connection with Basel 
III  and  the  Dodd-Frank Act. Additional  information  on  the  regulatory  capital  and  liquidity  requirements  currently 
applicable to Comerica is set forth in the “Supervision and Regulation” section of this report. These requirements, and 
any other new laws or regulations related to capital and liquidity, could adversely affect Comerica's ability to pay dividends 
or make equity repurchases, or could require Comerica to reduce business levels or to raise capital, including in ways 
that may adversely affect its results of operations or financial condition and/or existing shareholders. 

Further, our regulators may also require us to satisfy additional, more stringent capital adequacy and liquidity standards 
than those specified as part of the Dodd-Frank Act and the FRB's rules implementing Basel III.

Maintaining higher levels of capital and liquidity may reduce Comerica's profitability and otherwise adversely affect its 
business, financial condition, or results of operations. 

• 

Declines in the businesses or industries of Comerica's customers - in particular, the energy industry - could cause 
increased credit losses or decreased loan balances, which could adversely affect Comerica.

Comerica's business customer base consists, in part, of customers in volatile businesses and industries such as the energy 
industry, the automotive production industry and the real estate business. These industries are sensitive to global economic 
conditions, supply chain factors and/or commodities prices. Any decline in one of those customers' businesses or industries 
could cause increased credit losses, which in turn could adversely affect Comerica. Further, any decline in these businesses 
or industries could cause decreased borrowings, either due to reduced demand or reductions in the borrowing base available 
for each customer loan. 

In particular, oil and gas prices have remained at lower levels since mid-2014. Loans in the Energy business line were 
$2.3 billion, or less than 5 percent of total loans, at December 31, 2016. If oil and gas prices become further depressed 
and remain depressed for an extended period of time, Comerica's energy portfolio could experience increased credit 
losses, which could adversely affect Comerica's financial results. Additionally, a prolonged period of further decreased 
oil  prices  could  also  have  a  negative  impact  on  the Texas  economy,  which  could  have  a  material  adverse  effect  on 
Comerica’s business, financial condition and results of operations. For more information regarding Comerica's energy 
portfolio, please see “Energy Lending” beginning on page F-30 of the Financial Section of this report. 

• 

Unfavorable developments concerning credit quality could adversely affect Comerica's financial results.

Although Comerica regularly reviews credit exposure related to its customers and various industry sectors in which it 
has business relationships, default risk may arise from events or circumstances that are difficult to detect or foresee. 
Under such circumstances, Comerica could experience an increase in the level of provision for credit losses, nonperforming 
assets, net charge-offs and reserve for credit losses, which could adversely affect Comerica's financial results.

• 

Operational difficulties, failure of technology infrastructure or information security incidents could adversely 
affect Comerica's business and operations.

Comerica is exposed to many types of operational risk, including legal risk, the risk of fraud or theft by employees or 
outsiders, failure of Comerica's controls and procedures and unauthorized transactions by employees or operational errors, 
including clerical or recordkeeping errors or those resulting from computer or telecommunications systems malfunctions. 
Given  the  high  volume  of  transactions  at  Comerica,  certain  errors  may  be  repeated  or  compounded  before  they  are 
identified and resolved. The occurrence of such operational risks can lead to other types of risks including reputational 
and compliance risks that may amplify the adverse impact to Comerica.

In particular, Comerica's operations rely on the secure processing, storage and transmission of confidential and other 
information on its technology systems and networks. Any failure, interruption or breach in security of these systems could 
result in failures or disruptions in Comerica's customer relationship management, general ledger, deposit, loan and other 
systems. 

Comerica may also be subject to disruptions of its operating systems arising from events that are wholly or partially 
beyond its control, which may include, for example, computer viruses, cyber attacks (including cyber attacks resulting 
in the destruction or exfiltration of data and systems), spikes in transaction volume and/or customer activity, electrical 
or  telecommunications  outages,  or  natural  disasters. Although  Comerica  has  programs  in  place  related  to  business 
continuity, disaster recovery and information security to maintain the confidentiality, integrity, and availability of its 
systems, business applications and customer information, such disruptions may give rise to interruptions in service to 
customers and loss or liability to Comerica, including loss of customer data. Comerica has not experienced a cyber attack 
which resulted in a loss of client data. However, future cyber attacks could be more disruptive and damaging, and Comerica 
may not be able to anticipate or prevent all such attacks. 
14

The occurrence of any failure or interruption in Comerica's operations or information systems, or any security breach, 
could cause reputational damage, jeopardize the confidentiality of customer information, result in a loss of customer 
business, subject Comerica to regulatory intervention or expose it to civil litigation and financial loss or liability, any of 
which could have a material adverse effect on Comerica.

• 

Changes in regulation or oversight may have a material adverse impact on Comerica's operations.

Comerica is subject to extensive regulation, supervision and examination by the U.S. Treasury, the Texas Department of 
Banking, the FDIC, the FRB, the SEC, FINRA and other regulatory bodies. Such regulation and supervision governs the 
activities  in  which  Comerica  may  engage.  Regulatory  authorities  have  extensive  discretion  in  their  supervisory  and 
enforcement activities, including the imposition of restrictions on Comerica's operations, investigations and limitations 
related to Comerica's securities, the classification of Comerica's assets and determination of the level of Comerica's 
allowance  for  loan  losses. Any  change  in  such  regulation  and  oversight,  whether  in  the  form  of  regulatory  policy, 
regulations, legislation or supervisory action, may have a material adverse impact on Comerica's business, financial 
condition or results of operations. It is too soon for Comerica to predict what legislative or regulatory changes may occur 
as a result of the recent change in the U.S. presidential administration, or, if changes occur, the ultimate effect they would 
have upon the financial condition or results of operations of Comerica. The impact of any future legislation or regulatory 
actions may adversely affect Comerica's businesses or operations.

• 

Comerica relies on other companies to provide certain key components of its business infrastructure, and certain 
failures could materially adversely affect operations.

Comerica faces the risk of operational disruption, failure or capacity constraints due to its dependency on third party 
vendors for components of its business infrastructure. Third party vendors provide certain key components of Comerica's 
business infrastructure, such as data processing and storage, payment processing services, recording and monitoring 
transactions, internet connections and network access, clearing agency and card processing services. While Comerica 
conducts due diligence prior to engaging with third party vendors, it does not control their operations. Further, while 
Comerica's vendor management policies and practices are designed to comply with current vendor regulations, these 
policies and practices cannot eliminate this risk. In this context, any vendor failure to properly deliver these services 
could adversely affect Comerica’s business operations, and result in financial loss, reputational harm, and/or regulatory 
action. 

• 

Changes in the financial markets, including fluctuations in interest rates and their impact on deposit pricing, could 
adversely affect Comerica's net interest income and balance sheet.

The operations of financial institutions such as Comerica are dependent to a large degree on net interest income, which 
is the difference between interest income from loans and investments and interest expense on deposits and borrowings. 
Prevailing economic conditions, the trade, fiscal and monetary policies of the federal government and the policies of 
various  regulatory  agencies  all  affect  market  rates  of  interest  and  the  availability  and  cost  of  credit,  which  in  turn 
significantly affect financial institutions' net interest income and the market value of its investment securities. Interest 
rates over the past several years have remained at low levels, even following the Federal Open Market Committee's 25 
basis point rate rises in December 2015 and 2016. A continued low interest rate environment may continue to adversely 
affect the interest income Comerica earns on loans and investments. For a discussion of Comerica's interest rate sensitivity, 
please see, “Market and Liquidity Risk” beginning on page F-32 of the Financial Section of this report.

Volatility in interest rates can also result in disintermediation, which is the flow of funds away from financial institutions 
into direct investments, such as federal government and corporate securities and other investment vehicles, which, because 
of the absence of federal insurance premiums and reserve requirements, generally pay higher rates of return than financial 
institutions. Comerica's financial results could be materially adversely impacted by changes in financial market conditions.

• 

Reduction in our credit ratings could adversely affect Comerica and/or the holders of its securities.

Rating agencies regularly evaluate Comerica, and their ratings are based on a number of factors, including Comerica's 
financial strength as well as factors not entirely within its control, including conditions affecting the financial services 
industry generally. There can be no assurance that Comerica will maintain its current ratings. In February 2016, Standard 
& Poor's downgraded Comerica's long-term senior credit ratings one notch to BBB+ and Comerica Bank's long and short-
term credit ratings one notch to A- and A-2, respectively. In March 2015, Moody's Investors Service put global bank 
ratings on review following the publication of revised bank rating methodology and in May 2015, it downgraded Comerica 
Bank's long-term senior credit ratings one notch to A3. In February 2016, Moody's revised its outlook to "Negative." 
While recent credit rating actions have had little to no detrimental impact on Comerica's profitability, borrowing costs, 
or ability to access the capital markets, future downgrades to Comerica's or its subsidiaries' credit ratings could adversely 
affect Comerica's profitability, borrowing costs, or ability to access the capital markets or otherwise have a negative effect 
on Comerica's results of operations or financial condition. If such a reduction placed Comerica's or its subsidiaries' credit 

15

ratings below investment grade, it could also create obligations or liabilities under the terms of existing arrangements 
that could increase Comerica's costs under such arrangements. Additionally, a downgrade of the credit rating of any 
particular security issued by Comerica or its subsidiaries could negatively affect the ability of the holders of that security 
to sell the securities and the prices at which any such securities may be sold.

• 

The soundness of other financial institutions could adversely affect Comerica.

Comerica's ability to engage in routine funding transactions could be adversely affected by the actions and commercial 
soundness of other financial institutions. Financial services institutions are interrelated as a result of trading, clearing, 
counterparty or other relationships. Comerica has exposure to many different industries and counterparties, and it routinely 
executes transactions with counterparties in the financial industry, including brokers and dealers, commercial banks, 
investment banks, mutual and hedge funds, and other institutional clients. As a result, defaults by, or even rumors or 
questions about, one or more financial services institutions, or the financial services industry generally, have led, and 
may further lead, to market-wide liquidity problems and could lead to losses or defaults by us or by other institutions. 
Many of these transactions could expose Comerica to credit risk in the event of default of its counterparty or client. In 
addition, Comerica's credit risk may be impacted when the collateral held by it cannot be realized upon or is liquidated 
at prices not sufficient to recover the full amount of the financial instrument exposure due to Comerica. There is no 
assurance that any such losses would not adversely affect, possible materially in nature, Comerica.

• 

The introduction, implementation, withdrawal, success and timing of business initiatives and strategies may be 
less successful or may be different than anticipated, which could adversely affect Comerica's business.

Comerica makes certain projections and develops plans and strategies for its banking and financial products. If Comerica 
does not accurately determine demand for its banking and financial product needs, it could result in Comerica incurring 
significant expenses without the anticipated increases in revenue, which could result in a material adverse effect on its 
business.

• 

Damage to Comerica’s reputation could damage its businesses.

With consumers increasingly interested in doing business with companies they admire and trust, reputational risk is an 
increasing concern for business. Such risks include compliance issues, operational challenges, or a strategic, high profile 
event. Comerica's business is based on the trust of its customers, communities, and entire value chain, which makes 
managing  reputational  risk  extremely  important.   News  or  other  publicity  that  impairs  Comerica's  reputation,  or  the 
reputation of the financial services industry generally, can therefore cause significant harm to Comerica’s business and 
prospects. Further, adverse publicity or negative information posted on social media websites regarding Comerica, whether 
or not true, may result in harm to Comerica’s prospects.

• 

Comerica may not be able to utilize technology to efficiently and effectively develop, market, and deliver new 
products and services to its customers. 

The financial services industry experiences rapid technological change with regular introductions of new technology-
driven products and services. The efficient and effective utilization of technology enables financial institutions to better 
serve customers and to reduce costs. Comerica's future success depends, in part, upon its ability to address the needs of 
its customers by using technology to market and deliver products and services that will satisfy customer demands, meet 
regulatory  requirements,  and  create  additional  efficiencies  in  Comerica's  operations.  Comerica  may  not  be  able  to 
effectively  develop  new  technology-driven  products  and  services  or  be  successful  in  marketing  or  supporting  these 
products and services to its customers, which could have a material adverse impact on Comerica's financial condition 
and results of operations.

• 

Competitive product and pricing pressures among financial institutions within Comerica's markets may change.

Comerica operates in a very competitive environment, which is characterized by competition from a number of other 
financial institutions in each market in which it operates. Comerica competes in terms of products and pricing with large 
national and regional financial institutions and with smaller financial institutions. Some of Comerica's larger competitors, 
including certain nationwide banks that have a significant presence in Comerica's market area, may make available to 
their customers a broader array of product, pricing and structure alternatives and, due to their asset size, may more easily 
absorb credit losses in a larger overall portfolio. Some of Comerica's competitors (larger or smaller) may have more 
liberal lending policies and processes. 

Additionally, the financial services industry is subject to extensive regulation. For more information, see the “Supervision 
and Regulation” section of this report. Such regulations may require significant additional investments in technology, 
personnel or other resources or place limitations on the ability of financial institutions, including Comerica, to engage in 
certain activities. Comerica's competitors may be subject to a significantly different or reduced degree of regulation due 

16

to their asset size or types of products offered. They may also have the ability to more efficiently utilize resources to 
comply with regulations or may be able to more effectively absorb the costs of regulations into their existing cost structure. 

If Comerica is unable to compete effectively in products and pricing in its markets, business could decline, which could 
have a material adverse effect on Comerica's business, financial condition or results of operations.

• 

Changes  in  customer  behavior  may  adversely  impact  Comerica's  business,  financial  condition  and  results  of 
operations.

Comerica uses a variety of financial tools, models and other methods to anticipate customer behavior as a part of its 
strategic  planning  and  to  meet  certain  regulatory  requirements.  Individual,  economic,  political,  industry-specific 
conditions and other factors outside of Comerica's control, such as fuel prices, energy costs, real estate values or other 
factors that affect customer income levels, could alter predicted customer borrowing, repayment, investment and deposit 
practices. Such a change in these practices could materially adversely affect Comerica's ability to anticipate business 
needs and meet regulatory requirements.

Further,  difficult  economic  conditions  may  negatively  affect  consumer  confidence  levels. A  decrease  in  consumer 
confidence levels would likely aggravate the adverse effects of these difficult market conditions on Comerica, Comerica's 
customers and others in the financial institutions industry.

• 

Any future strategic acquisitions or divestitures may present certain risks to Comerica's business and operations.

Difficulties  in  capitalizing  on  the  opportunities  presented  by  a  future  acquisition  may  prevent  Comerica  from  fully 
achieving the expected benefits from the acquisition, or may cause the achievement of such expectations to take longer 
to realize than expected. 

Further, the assimilation of the acquired entity's customers and markets could result in higher than expected deposit 
attrition, loss of key employees, disruption of Comerica's businesses or the businesses of the acquired entity or otherwise 
adversely affect Comerica's ability to maintain relationships with customers and employees or achieve the anticipated 
benefits of the acquisition. These matters could have an adverse effect on Comerica for an undetermined period. Comerica 
will be subject to similar risks and difficulties in connection with any future decisions to downsize, sell or close units or 
otherwise change the business mix of Comerica.

• 

Management's ability to maintain and expand customer relationships may differ from expectations.

The financial services industry is very competitive. Comerica not only vies for business opportunities with new customers, 
but also competes to maintain and expand the relationships it has with its existing customers. While management believes 
that it can continue to grow many of these relationships, Comerica will continue to experience pressures to maintain these 
relationships as its competitors attempt to capture its customers. Failure to create new customer relationships and to 
maintain and expand existing customer relationships to the extent anticipated may adversely impact Comerica's earnings.

• 

Management's ability to retain key officers and employees may change.

Comerica's future operating results depend substantially upon the continued service of its executive officers and key 
personnel. Comerica's future operating results also depend in significant part upon its ability to attract and retain qualified 
management, financial, technical, marketing, sales and support personnel. Competition for qualified personnel is intense, 
and Comerica cannot ensure success in attracting or retaining qualified personnel. There may be only a limited number 
of persons with the requisite skills to serve in these positions, and it may be increasingly difficult for Comerica to hire 
personnel over time. 

Further, Comerica's ability to retain key officers and employees may be impacted by legislation and regulation affecting 
the financial services industry. In 2016, the FRB, OCC and several other federal financial regulators revised and re-
proposed rules to implement Section 956 of the Dodd-Frank Act. Section 956 directed regulators to jointly prescribe 
regulations or guidelines prohibiting incentive-based payment arrangements, or any feature of any such arrangement, at 
covered financial institutions that encourage inappropriate risks by providing excessive compensation or that could lead 
to a material financial loss. Consistent with the Dodd-Frank Act, the proposed rule would not apply to institutions with 
total consolidated assets of less than $1 billion, and would impose heightened standards for institutions with $50 billion 
or more in total consolidated assets, which includes Comerica. For these larger institutions, the proposed rule would 
require the deferral of at least 40 percent of incentive-based payments for designated executives and significant risk-
takers who individually have the ability to expose the institution to possible losses that are substantial in relation to the 
institution's size, capital or overall risk tolerance. Moreover, incentive-based compensation of these individuals would 
be subject to potential clawback for seven years following vesting. Further, the rule imposes enhanced risk management 
controls  and  governance  and  internal  policy  and  procedure  requirements  with  respect  to  incentive  compensation. 
Accordingly,  Comerica  may  be  at  a  disadvantage  to  offer  competitive  compensation  compared  to  other  financial 
institutions (as referenced above) or companies in other industries, which may not be subject to the same requirements.  

17

Comerica's business, financial condition or results of operations could be materially adversely affected by the loss of any 
of its key employees, or Comerica's inability to attract and retain skilled employees.

• 

Legal and regulatory proceedings and related matters with respect to the financial services industry, including 
those directly involving Comerica and its subsidiaries, could adversely affect Comerica or the financial services 
industry in general.

Comerica has been, and may in the future be, subject to various legal and regulatory proceedings. It is inherently difficult 
to assess the outcome of these matters, and there can be no assurance that Comerica will prevail in any proceeding or 
litigation. Any such matter could result in substantial cost and diversion of Comerica's efforts, which by itself could have 
a material adverse effect on Comerica's financial condition and operating results. Further, adverse determinations in such 
matters  could  result  in  actions  by  Comerica's  regulators  that  could  materially  adversely  affect  Comerica's  business, 
financial condition or results of operations.

Comerica establishes reserves for legal claims when payments associated with the claims become probable and the costs 
can be reasonably estimated. Comerica may still incur legal costs for a matter even if it has not established a reserve. In 
addition, due to the inherent subjectivity of the assessments and unpredictability of the outcome of legal proceedings, 
the actual cost of resolving a legal claim may be substantially higher than any amounts reserved for that matter. The 
ultimate resolution of a pending legal proceeding, depending on the remedy sought and granted, could adversely affect 
Comerica's results of operations and financial condition.

• 

Methods of reducing risk exposures might not be effective.

• 

• 

• 

Instruments, systems and strategies used to hedge or otherwise manage exposure to various types of credit, market, 
liquidity, operational, compliance, financial reporting and strategic risks could be less effective than anticipated. As a 
result, Comerica may not be able to effectively mitigate its risk exposures in particular market environments or against 
particular types of risk, which could have a material adverse impact on Comerica's business, financial condition or results 
of operations.

Terrorist activities or other hostilities may adversely affect the general economy, financial and capital markets, 
specific industries, and Comerica.

Terrorist attacks or other hostilities may disrupt Comerica's operations or those of its customers. In addition, these events 
have had and may continue to have an adverse impact on the U.S. and world economy in general and consumer confidence 
and spending in particular, which could harm Comerica's operations. Any of these events could increase volatility in the 
U.S. and world financial markets, which could harm Comerica's stock price and may limit the capital resources available 
to Comerica and its customers. This could have a material adverse impact on Comerica's operating results, revenues and 
costs and may result in increased volatility in the market price of Comerica's common stock.

Catastrophic events, including, but not limited to, hurricanes, tornadoes, earthquakes, fires, droughts and floods, 
may adversely affect the general economy, financial and capital markets, specific industries, and Comerica.

Comerica has significant operations and a significant customer base in California, Texas, Florida and other regions where 
natural and other disasters may occur. These regions are known for being vulnerable to natural disasters and other risks, 
such as tornadoes, hurricanes, earthquakes, fires, droughts and floods, the nature and severity of which may be impacted 
by climate change. These types of natural catastrophic events at times have disrupted the local economy, Comerica's 
business and customers and have posed physical risks to Comerica's property. In addition, catastrophic events occurring 
in other regions of the world may have an impact on Comerica's customers and in turn, on Comerica. A significant 
catastrophic event could materially adversely affect Comerica's operating results.

The tax treatment of corporations could be subject to potential legislative, administrative or judicial changes or 
interpretations.

The  present  federal  income  tax  treatment  of  corporations  may  be  modified  by  legislative,  administrative  or  judicial 
changes or interpretations at any time. For example, the current administration has indicated it will propose reductions 
to the corporate statutory tax rate.  A decline in the federal corporate tax rate may lower Comerica’s tax provision expense.  
However, it may also significantly decrease the value of Comerica’s deferred tax assets (“DTAs”), which would result 
in a reduction of net income in the period in which the tax change is enacted.  At December 31, 2016, Comerica’s net 
DTAs were approximately $217 million.  

As well, if the President and Congress approve comprehensive tax reform, low-income housing tax credits (LIHTCs), 
New  Markets Tax  Credits  (NMTCs),  the  beneficial  tax  treatment  of  bank-owned  life  insurance  or  other  current  tax 
positions taken by Comerica could be at risk. We are unable to predict whether any of these changes, or other proposals, 
will ultimately be enacted. Any such changes could adversely affect Comerica. 

18

• 

Changes in accounting standards could materially impact Comerica's financial statements. 

From time to time accounting standards setters change the financial accounting and reporting standards that govern the 
preparation of Comerica's financial statements. These changes can be difficult to predict and can materially impact how 
Comerica records and reports its financial condition and results of operations. In some cases, Comerica could be required 
to  apply  a  new  or  revised  standard  retroactively,  resulting  in  changes  to  previously  reported  financial  results,  or  a 
cumulative charge to retained earnings. 

• 

Comerica's accounting policies and processes are critical to the reporting of financial condition and results of 
operations. They require management to make estimates about matters that are uncertain. 

Accounting policies and processes are fundamental to how Comerica records and reports the financial condition and 
results of operations. Management must exercise judgment in selecting and applying many of these accounting policies 
and processes so they comply with U.S. GAAP. In some cases, management must select the accounting policy or method 
to apply from two or more alternatives, any of which may be reasonable under the circumstances, yet may result in the 
Company reporting materially different results than would have been reported under a different alternative.

Management has identified certain accounting policies as being critical because they require management's judgment to 
make difficult, subjective or complex judgments about matters that are uncertain. Materially different amounts could be 
reported under different conditions or using different assumptions or estimates. Comerica has established detailed policies 
and control procedures that are intended to ensure these critical accounting estimates and judgments are well controlled 
and applied consistently. In addition, the policies and procedures are intended to ensure that the process for changing 
methodologies occurs in an appropriate manner. Because of the uncertainty surrounding management's judgments and 
the estimates pertaining to these matters, Comerica cannot guarantee that it will not be required to adjust accounting 
policies or restate prior period financial statements. See “Critical Accounting Policies” on pages F-38 through F-41 of 
the Financial Section of this report and Note 1 of the Notes to Consolidated Financial Statements located on pages F-49 
through F-61 of the Financial Section of this report. 

Item 1B.  Unresolved Staff Comments.

None.

Item 2.  Properties.

The executive offices of Comerica are located in the Comerica Bank Tower, 1717 Main Street, Dallas, Texas 75201. 
Comerica Bank occupies six floors of the building, plus additional space on the building's lower level. Comerica does not own 
the Comerica Bank Tower space, but has naming rights to the building and leases the space from an unaffiliated third party. The 
lease for such space used by Comerica and its subsidiaries extends through September 2023. Comerica's Michigan headquarters 
are located in a 10-story building in the central business district of Detroit, Michigan at 411 W. Lafayette, Detroit, Michigan 48226. 
Such building is owned by Comerica Bank. As of December 31, 2016, Comerica, through its banking affiliates, operated at a total 
of 591 locations. This includes banking centers, trust services locations, and/or loan production or other financial services offices, 
primarily in the States of Texas, Michigan, California, Florida and Arizona. Of the 591 locations, 236 were owned and 355 were 
leased. As of December 31, 2016, affiliates also operated from leased spaces in Denver, Colorado; Wilmington, Delaware; Oakbrook 
Terrace, Illinois; Boston, Massachusetts; Minneapolis, Minnesota; Morristown, New Jersey; New York, New York; Rocky Mount, 
North Carolina; Memphis, Tennessee; McLean, Virginia; Bellevue and Seattle, Washington; Monterrey, Mexico; Toronto, Ontario, 
Canada and Windsor, Ontario, Canada. Comerica and its subsidiaries own, among other properties, a check processing center in 
Livonia, Michigan, and three buildings in Auburn Hills, Michigan, used mainly for lending functions and operations.

Item 3.  Legal Proceedings. 

Please  see  Note 21  of  the  Notes  to  Consolidated  Financial  Statements  located  on  pages F-100  through  F-101  of  the 

Financial Section of this report. 

Item 4.   Mine Safety Disclosures.

Not applicable.

19

 
PART II

Item 5.  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information and Holders of Common Stock

The common stock of Comerica Incorporated is traded on the New York Stock Exchange (NYSE Trading Symbol: CMA). 

At February 7, 2017, there were approximately 9,581 record holders of Comerica's common stock.

Sales Prices and Dividends

Quarterly cash dividends were declared during 2016 and 2015 totaling $0.89 and $0.83 per common share per year, 
respectively. The following table sets forth, for the periods indicated, the high and low sale prices per share of Comerica's common 
stock as reported on the NYSE Composite Transactions Tape for all quarters of 2016 and 2015, as well as dividend information.

Quarter    

2016

Fourth
Third
Second
First

2015

$

High

Low

Dividends Per Share

Dividend Yield*    

$

70.44
47.81
47.55
41.74

$

46.75
38.39
36.27
30.48

0.23
0.23
0.22
0.21

1.6%
2.1
2.1
2.3

$

Fourth
Third
Second
First
* Dividend yield is calculated by annualizing the quarterly dividend per share and dividing by an average of the high and low 
price in the quarter.

47.44
52.93
53.45
47.94

39.52
40.01
44.38
40.09

1.9%
1.8
1.7
1.8

0.21
0.21
0.21
0.20

$

$

A discussion of dividend restrictions is set forth in Note 20 of the Notes to Consolidated Financial Statements located 
on pages F-99 through F-100 of the Financial Section of this report, in the "Capital" section on pages F-19 through F-22 of the 
Financial Section of this report and in the “Supervision and Regulation” section of this report. 

Performance Graph

Our performance graph is available under the caption "Performance Graph" on page F-2 of the Financial Section of this 

report.

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

On July 26, 2016, the Board of Directors of Comerica authorized the repurchase of up to an additional 10.0 million shares 
of Comerica Incorporated outstanding common stock, in addition to the 5.7 million shares remaining at June 30, 2016 under the 
Board's prior authorizations for the equity repurchase program initially approved in November 2010. Including the July 2016 
authorization, a total of 50.3 million shares and 14.1 million warrants (12.1 million share-equivalents) have been authorized for 
repurchase under the equity repurchase program since its inception in 2010. There is no expiration date for Comerica's equity 
repurchase program. 

The following table summarizes Comerica's equity repurchase activity for the year ended December 31, 2016.

20

(shares in thousands)
Total first quarter 2016
Total second quarter 2016
Total third quarter 2016
October 2016
November 2016
December 2016
Total fourth quarter 2016

Total 2016

Total Number of Shares 
and Warrants Purchased 
as Part of Publicly 
Announced Repurchase 
Plans or Programs (a)

Remaining
Repurchase
Authorization 
(b)

Total Number
of Shares
Purchased (c)

Average 
Price
Paid Per 
Share

1,183
1,483
2,123
839
644
302
1,785
6,574

15,721
14,238
22,114 (d)
19,575
17,834
15,694
15,694
15,694

1,393
1,488
2,134
842
645
307
1,794
6,809

$

$

35.26
43.78
45.66
49.88
57.10
67.27
55.45
45.70

(a)  Comerica made no repurchases of warrants under the repurchase program during the year ended December 31, 2016. Upon exercise of a 
warrant, the number of shares with a value equal to the aggregate exercise price is withheld from an exercising warrant holder as payment 
(known as a "net exercise provision"). During the year ended December 31, 2016, Comerica withheld the equivalent of approximately 
2,319,000 shares to cover an aggregate of $68.2 million in exercise price and issued approximately 2,317,000 shares to the exercising 
warrant holders. Shares withheld in connection with the net exercise provision are not included in the total number of shares or warrants 
purchased in the above table.

(b)  Maximum number of shares and warrants that may yet be purchased under the publicly announced plans or programs.
(c)  Includes approximately 235,000 shares (including 9,000 shares in the quarter ended December 31, 2016) purchased pursuant to deferred 
compensation plans and shares purchased from employees to pay for taxes related to restricted stock vesting under the terms of an employee 
share-based compensation plan and 26 shares purchased by affiliated purchasers through employee benefits plan transactions during the 
year ended December 31, 2016. These transactions are not considered part of Comerica's repurchase program.

(d)  Includes July 26, 2016 equity repurchase authorization for up to an additional 10.0 million shares.

Item 6.  Selected Financial Data.

Reference is made to the caption “Selected Financial Data” on page F-3 of the Financial Section of this report. 

Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Reference is made to the sections entitled “2016 Overview and 2017 Outlook,” “Results of Operations," "Strategic Lines 
of Business," "Balance Sheet and Capital Funds Analysis," "Risk Management," "Critical Accounting Policies," "Supplemental 
Financial Data" and "Forward-Looking Statements" on pages F-4 through F-43 of the Financial Section of this report.

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk.

Reference is made to the subheadings entitled “Market and Liquidity Risk,” “Operational Risk,” “Compliance Risk” and 

“Strategic Risk” on pages F-32 through F-37 of the Financial Section of this report.

Item 8.  Financial Statements and Supplementary Data.

Reference  is  made  to  the  sections  entitled  “Consolidated  Balance  Sheets,”  “Consolidated  Statements  of  Income,” 
“Consolidated  Statements  of  Comprehensive  Income,”  “Consolidated  Statements  of  Changes  in  Shareholders'  Equity,” 
“Consolidated Statements of Cash Flows,” “Notes to Consolidated Financial Statements,” “Report of Management,” “Reports of 
Independent Registered Public Accounting Firm,” and “Historical Review” on pages F-44 through F-114 of the Financial Section 
of this report. 

Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

None.

Item 9A.  Controls and Procedures.

Disclosure Controls and Procedures

As required by Rule 13a-15(b) of the Exchange Act, management, including the Chief Executive Officer and Chief 
Financial  Officer,  conducted  an  evaluation  as  of  the  end  of  the  period  covered  by  this Annual  Report  on  Form 10-K,  of  the 
effectiveness of our disclosure controls and procedures as defined in Exchange Act Rule 13a-15(e). Based on that evaluation, the 
Chief Executive Officer and Chief Financial Officer concluded that Comerica's disclosure controls and procedures were effective 
as of the end of the period covered by this Annual Report on Form 10-K.

21

 
Internal Control over Financial Reporting

Management's annual report on internal control over financial reporting and the related attestation report of Comerica's 

registered public accounting firm are included on pages F-109 and F-110 in the Financial Section of this report. 

As required by Rule 13a-15(d) of the Exchange Act, management, including the Chief Executive Officer and Chief 
Financial Officer, conducted an evaluation of our internal control over financial reporting to determine whether any changes 
occurred during the period covered by this Annual Report on Form 10-K that have materially affected, or are reasonably likely to 
materially affect, Comerica's internal control over financial reporting. Based on that evaluation, the Chief Executive Officer and 
Chief Financial Officer concluded that there has been no such change during the last quarter of the fiscal year covered by this 
Annual Report on Form 10-K that has materially affected, or is reasonably likely to materially affect, Comerica's internal control 
over financial reporting.

Item 9B.  Other Information.

None.

PART III

Item 10.  Directors, Executive Officers and Corporate Governance.

Comerica has a Senior Financial Officer Code of Ethics that applies to the Chief Executive Officer, the Chief Financial 
Officer, the Chief Accounting Officer and the Treasurer. The Senior Financial Officer Code of Ethics is available on Comerica's 
website at www.comerica.com. If any substantive amendments are made to the Senior Financial Officer Code of Ethics or if 
Comerica grants any waiver, including any implicit waiver, from a provision of the Senior Financial Officer Code of Ethics to the 
Chief Executive Officer, the Chief Financial Officer, the Chief Accounting Officer or the Treasurer, we will disclose the nature of 
such amendment or waiver on our website.

The remainder of the response to this item will be included under the sections captioned “Information About Nominees,”  
“Committees  and  Meetings  of  Directors,”  “Committee  Assignments,”  “Executive  Officers”  and  “Section 16(a)  Beneficial 
Ownership Reporting Compliance” of Comerica's definitive Proxy Statement relating to the Annual Meeting of Shareholders to 
be held on April 25, 2017, which sections are hereby incorporated by reference.

Item 11.  Executive Compensation.

The response to this item will be included under the sections captioned “Compensation Committee Interlocks and Insider 
Participation,”  “Compensation  Discussion  and  Analysis,”  “Compensation  of  Directors,”  “Governance,  Compensation  and 
Nominating  Committee  Report,”  “2016 Summary  Compensation Table,”  “2016 Grants  of  Plan-Based Awards,”  “Outstanding 
Equity Awards at Fiscal Year-End 2016,” “2016 Option Exercises and Stock Vested,” “Pension Benefits at Fiscal Year-End 2016,” 
“2016 Nonqualified Deferred Compensation,” and “Potential Payments upon Termination or Change of Control at Fiscal Year-
End 2016” of Comerica's definitive Proxy Statement relating to the Annual Meeting of Shareholders to be held on April 25, 2017, 
which sections are hereby incorporated by reference.

Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The  response  to  this  item  will  be  included  under  the  sections  captioned  “Security  Ownership  of  Certain  Beneficial 
Owners,” “Security Ownership of Management” and "Securities Authorized for Issuance Under Equity Compensation Plans" of 
Comerica's definitive Proxy Statement relating to the Annual Meeting of Shareholders to be held on April 25, 2017, which sections 
are hereby incorporated by reference.

Item 13.  Certain Relationships and Related Transactions, and Director Independence.

The response to this item will be included under the sections captioned “Director Independence and Transactions of 
Directors with Comerica,” “Transactions of Related Parties with Comerica,” and “Information about Nominees” of Comerica's 
definitive Proxy Statement relating to the Annual Meeting of Shareholders to be held on April 25, 2017, which sections are hereby 
incorporated by reference.

Item 14.  Principal Accountant Fees and Services.

The response to this item will be included under the section captioned “Independent Registered Public Accounting Firm” 
of Comerica's definitive Proxy Statement relating to the Annual Meeting of Shareholders to be held on April 25, 2017, which 
section is hereby incorporated by reference.

PART IV

Item 15.  Exhibits and Financial Statement Schedules

The following documents are filed as a part of this report:

22

1.

2.

3.

Financial Statements: The financial statements that are filed as part of this report are included in the Financial Section 
on pages F-44 through F-111.

All of the schedules for which provision is made in the applicable accounting regulations of the SEC are either not 
required under the related instruction, the required information is contained elsewhere in the Form 10-K, or the 
schedules are inapplicable and therefore have been omitted.

Exhibits: The exhibits listed on the Exhibit Index on pages E-1 through E-5 of this Form 10-K are filed with this 
report or are incorporated herein by reference.

Item 16.  Form 10-K Summary

Not applicable.

23

 
FINANCIAL REVIEW AND REPORTS

Comerica Incorporated and Subsidiaries

Performance Graph

Selected Financial Data

2016 Overview and 2017 Outlook

Results of Operations

Strategic Lines of Business

Balance Sheet and Capital Funds Analysis

Risk Management

Critical Accounting Policies

Supplemental Financial Data

Forward-Looking Statements

Consolidated Financial Statements:

Consolidated Balance Sheets

Consolidated Statements of Income

Consolidated Statements of Comprehensive Income

Consolidated Statements of Changes in Shareholders’ Equity

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

Report of Management

Reports of Independent Registered Public Accounting Firm

Historical Review

F-2

F-3

F-4

F-6

F-12

F-16

F-23

F-38

F-42

F-43

F-44

F-45

F-46

F-47

F-48

F-49

F-109

F-110

F-112

F-1

PERFORMANCE GRAPH

The  graph  shown  below  compares  the  total  returns  (assuming  reinvestment  of  dividends)  of  Comerica  Incorporated 
common stock, the S&P 500 Index, and the KBW Bank Index. The graph assumes $100 invested in Comerica Incorporated common 
stock (returns based on stock prices per the NYSE) and each of the indices on December 31, 2011 and the reinvestment of all 
dividends during the periods presented.

The performance shown on the graph is not necessarily indicative of future performance.

F-2

SELECTED FINANCIAL DATA

(dollar amounts in millions, except per share data)
Years Ended December 31

2016

2015

2014

2013

2012

2.67
0.55
36.86
33.36
30.34
192

$ 1,728
79
863
1,750
241
521
515

$

$

$

$

$

(b)

2.68
0.89
44.47
40.79
68.11
177

2.85
0.68
39.22
35.64
47.54
187

2.84
0.83
43.03
39.33
41.83
181

3.16
0.79
41.35
37.72
46.84
185

$72,978
67,518
49,088
58,985
5,160
7,796

$ 71,877
66,687
49,084
59,853
3,058
7,560

$ 65,224
60,200
45,470
53,292
3,543
7,150

$ 69,186
63,788
48,593
57,486
2,675
7,402

$ 1,797
248
1,051
1,930
193
477
473

$ 1,689
147
1,035
1,827
229
521
515

$ 1,655
27
857
1,615
277
593
586

$ 1,672
46
874
1,714
245
541
533

EARNINGS SUMMARY
Net interest income
Provision for credit losses
Noninterest income (a)
Noninterest expenses (a)
Provision for income taxes
Net income
Net income attributable to common shares
PER SHARE OF COMMON STOCK
Diluted earnings per common share
Cash dividends declared
Common shareholders’ equity
Tangible common equity (c)
Market value
Average diluted shares (in millions)
YEAR-END BALANCES
Total assets
Total earning assets
Total loans
Total deposits
Total medium- and long-term debt
Total common shareholders’ equity
AVERAGE BALANCES
Total assets
Total earning assets
Total loans
Total deposits
Total medium- and long-term debt
Total common shareholders’ equity
CREDIT QUALITY
Total allowance for credit losses
Total nonperforming loans
Foreclosed property
Total nonperforming assets
Net credit-related charge-offs
Net credit-related charge-offs as a percentage of average total loans
Allowance for loan losses as a percentage of total period-end loans
Allowance for loan losses as a percentage of total nonperforming loans
RATIOS
Net interest margin (fully taxable equivalent)
Return on average assets
Return on average common shareholders’ equity
Dividend payout ratio
Average common shareholders’ equity as a percentage of average assets
Common equity tier 1 capital as a percentage of risk-weighted assets (d)
Tier 1 capital as a percentage of risk-weighted assets (d)
Common equity ratio
Tangible common equity as a percentage of tangible assets (c)
(a)  Effective January 1, 2015, contractual changes to a card program resulted in a change to the accounting presentation of the related 
revenues and expenses. The effect of this change was an increase of $177 million in 2015 to both noninterest income and noninterest 
expenses. Amounts prior to 2015 reflect revenues from this card program net of related noninterest expenses.

2.71%
0.67
6.22
32.48
10.70
11.09
11.09
10.68
9.89

2.70%
0.89
8.05
24.09
11.11
n/a
10.50
10.70
9.85

2.60%
0.74
6.91
28.33
10.73
10.54
10.54
10.52
9.70

2.84%
0.85
7.76
23.29
10.90
n/a
10.64
10.97
10.07

771
590
17
607
157
0.32%
1.49
124

$ 70,247
65,129
48,628
58,326
2,905
7,534

$ 63,933
59,091
44,412
51,711
3,972
6,965

$ 66,336
61,560
46,588
54,784
2,963
7,373

679
379
12
391
101
0.21%
1.29
167

635
290
10
300
25
0.05%
1.22
205

634
374
9
383
73
0.16%
1.32
160

$71,743
66,545
48,996
57,741
4,917
7,674

$

$

$

$

$

$ 65,066
59,618
46,057
52,191
4,720
6,939

$ 62,569
57,483
43,306
49,533
4,818
7,009

661
541
54
595
170
0.39%
1.37
116

3.03%
0.83
7.43
20.52
11.21
n/a
10.14
10.67
9.76

(b)  Noninterest expenses in 2016 included restructuring charges of $93 million.
(c)  See Supplemental Financial Data section for reconcilements of non-GAAP financial measures.
(d)  Ratios calculated based on the risk-based capital requirements in effect at the time. The U.S. implementation of the Basel III regulatory 

capital framework became effective on January 1, 2015, with transitional provisions.

n/a - not applicable.

F-3

2016 OVERVIEW AND 2017 OUTLOOK

Comerica Incorporated (the Corporation) is a financial holding company headquartered in Dallas, Texas. The Corporation's 
major business segments are the Business Bank, the Retail Bank and Wealth Management. The core businesses are tailored to 
each of the Corporation's three primary geographic markets: Michigan, California and Texas. Information about the activities of 
the Corporation's business segments is provided in Note 23 to the consolidated financial statements.

As a financial institution, the Corporation's principal activity is lending to and accepting deposits from businesses and 
individuals. The primary source of revenue is net interest income, which is principally derived from the difference between interest 
earned on loans and investment securities and interest paid on deposits and other funding sources. The Corporation also provides 
other  products  and  services  that  meet the  financial needs  of  customers  which  generate noninterest  income, the  Corporation's 
secondary source of revenue. Growth in loans, deposits and noninterest income is affected by many factors, including economic 
conditions in the markets the Corporation serves, the financial requirements and economic health of customers, and the ability to 
add new customers and/or increase the number of products used by current customers. Success in providing products and services 
depends on the financial needs of customers and the types of products desired.

The accounting and reporting policies of the Corporation and its subsidiaries conform to generally accepted accounting 
principles (GAAP) in the United States (U.S.). The Corporation's consolidated financial statements are prepared based on the 
application of accounting policies, the most significant of which are described in Note 1 to the consolidated financial statements.  
The most critical of these significant accounting policies are discussed in the “Critical Accounting Policies” section of this financial 
review. 

GROWTH IN EFFICIENCY AND REVENUE INITIATIVE

In the second quarter 2016, the Corporation launched the Growth in Efficiency and Revenue (GEAR Up) initiative in 
order to meaningfully enhance profitability. Actions identified under this initiative are expected to drive additional annual pre-tax 
income, before restructuring charges, of approximately $270 million for full-year 2018. Additional financial targets expected from 
GEAR Up include a double-digit return on equity and an efficiency ratio at or below 60 percent by year-end 2018.

• 

2016 progress included a reduction in workforce and a significant reduction in retirement plan expense due to a new 
retirement program, which together resulted in 2016 expense savings of more than $25 million, as well as the consolidation 
of 19 banking centers. For additional information regarding retirement plan changes, refer to the "Critical Accounting 
Policies" section of this financial review and Note 17 to the consolidated financial statements.

•  Expense reductions are expected to save an additional $125 million in full-year 2017, relative to the 2016 GEAR Up 
savings of more than $25 million, and increase to approximately $200 million in full-year 2018. This is to be achieved 
through continued savings from the reduction in workforce and the new retirement program, streamlining operational 
processes, real estate optimization, including consolidating an additional 19 banking centers in 2017 as well as reducing 
office  and  operations  space,  selective  outsourcing  of  technology  functions  and  reduction  of  technology  system 
applications.

•  Revenue enhancements are expected to ramp-up to approximately $30 million in full-year 2017, gradually increasing to 
approximately $70 million in full-year 2018, through expanded product offerings, enhanced sales tools and training and 
improved customer analytics to drive opportunities.
Pre-tax restructuring charges of $140 million to $160 million in total are expected to be incurred through 2018. This 
includes restructuring charges totaling $93 million, which were incurred through December 31, 2016, and an additional 
$25 million to $50 million expected in 2017. For additional information regarding restructuring charges, refer to Note 
22 to the consolidated financial statements.

• 

OVERVIEW

•  Net income was $477 million in 2016, a decrease of $44 million, or 8 percent, compared to $521 million in 2015. Net 
income per diluted common share was $2.68 in 2016, compared to $2.84 in 2015. Excluding the after-tax impact of 
restructuring charges associated with GEAR Up of $59 million, or $0.34 per share, net income increased $15 million, or 
3 percent.

•  Average loans were $49.0 billion in 2016, an increase of $368 million, or 1 percent, compared to 2015. Excluding a $641 
million decrease in Energy, average loans increased $1.0 billion, primarily reflecting increases in Commercial Real Estate, 
National Dealer Services and Mortgage Banker Finance, partially offset by decreases in general Middle Market and 
Corporate Banking.

•  Average deposits decreased $585 million, or 1 percent, to $57.7 billion in 2016, compared to 2015. The decrease in 
average deposits reflected a decrease of $2.2 billion, or 7 percent, in interest-bearing deposits, partially offset by an 
increase of $1.7 billion, or 6 percent, in average noninterest-bearing deposits. The decrease in interest-bearing deposits 
reflected decreases of $1.3 billion, or 6 percent, in money market and interest-bearing checking deposits and $1.0 billion, 
or 24 percent, in customer certificates of deposit. The decrease in average deposits primarily reflected purposeful pricing 
discipline  and  strategic  actions  in  light  of  new  Liquidity  Coverage  Ratio  (LCR)  rules,  with  the  largest  decreases  in 

F-4

Municipalities (a general Middle Market business), Corporate Banking and the Financial Services Division (a general 
Middle Market business), partially offset by increases in the remaining general Middle Market businesses and Retail 
Banking.

•  Net interest income was $1.8 billion in 2016, an increase of $108 million, or 6 percent, compared to 2015. The increase
in net interest income resulted primarily from higher interest rates, loan growth and a larger securities portfolio, partially 
offset by higher debt costs.

•  The  provision  for  credit  losses  was  $248  million  in  2016,  an  increase  of  $101  million  compared  to  2015,  primarily 
reflecting increased reserves for Energy and energy-related loans recorded in the first quarter 2016, partially offset by 
improved credit quality in the remainder of the portfolio. Net credit-related charge-offs were $157 million, or 0.32 percent 
of average loans, for 2016, an increase of $46 million compared to 2015. The increase was primarily due to an increase 
in charge-offs in the Energy portfolio.

•  Noninterest income increased $16 million, or 2 percent, in 2016, compared to 2015. Customer-driven fees increased $22 
million and non-fee categories declined $6 million. An increase in card fees as well as growth in fiduciary, customer 
derivative and foreign exchange income was partially offset by lower commercial lending fees and investment banking 
income.

•  Noninterest  expenses  increased  $103  million,  or  6  percent,  in  2016,  compared  to  2015.  Excluding  $93  million  of 
restructuring charges related to the GEAR Up initiative and $33 million from the net release of litigation reserves in 2015, 
noninterest expenses decreased $23 million. This primarily reflected a decrease of $48 million in salaries and benefits 
expense, including GEAR Up savings estimated to be in excess of $25 million as well as an additional decrease in pension 
expense,  partially  offset  by  the  impact  of  merit  increases  and  one  additional  day  in  2016. Additionally,  increases  in 
technology expense, outside processing fees and FDIC insurance premiums were partially offset by decreases in state 
business taxes and gains from the early termination of leveraged lease transactions.

•  The provision for income taxes decreased $36 million in 2016, compared to 2015. The effective tax rate was 28.8 percent 
in 2016, compared to 30.5 percent in 2015, primarily reflecting a $10 million increase in tax benefits from the early 
termination of certain leveraged lease transactions.

•  The quarterly dividend was increased to 22 cents per share in April 2016 and to 23 cents per share in July 2016.
•  The Corporation repurchased approximately 6.6 million shares of common stock during 2016 under the equity repurchase 
program. Together with dividends of $0.89 per share, $458 million, or 96 percent of 2016 net income, was returned to 
shareholders.

2017 OUTLOOK

Management expectations for 2017, compared to 2016, assuming a continuation of the current economic and low rate 
environment as well as contributions from the GEAR Up initiative of $30 million in revenue and $125 million in expense savings, 
are as follows:

•  Average loans higher, in line with Gross Domestic Product growth, reflecting increases in most lines of business and 

reduced headwinds from a declining Energy portfolio.

•  Net interest income higher, reflecting the benefit from the December 2016 short-term rate increase and loan growth, 

partially offset by higher funding costs and minor loan yield comparison.

Full-year benefit from the December rise in short-term rates expected to be more than $70 million, assuming a 
25 percent deposit beta.

• 

Provision for credit losses lower, with continued solid performance of the overall portfolio.

Provision and net charge-offs in line with historical normal levels of 30-40 basis points.

•  Noninterest income higher, with the execution of GEAR Up opportunities, modest growth in treasury management and 

card fees, as well as wealth management products such as fiduciary and brokerage services.

Increase of 4 percent to 6 percent.

•  Noninterest expenses lower, reflecting lower restructuring charges and an additional $125 million in GEAR Up savings, 
relative to 2016 GEAR Up savings of more than $25 million. Outside processing is expected to increase in line with 
growing revenue. Headwinds include increased technology costs and higher FDIC insurance expense, as well as typical 
inflationary pressure. The gains of $13 million in 2016 from early terminations of certain leveraged lease transactions 
are not expected to repeat.

Restructuring charges of $25 million to $50 million, compared to $93 million in 2016.

Remaining noninterest expenses 1 percent to 2 percent lower.

Decrease of 4 percent to 5 percent including restructuring charges.

• 

Income tax expense to approximate 33 percent of pre-tax income excluding the impact of discrete items such as the tax 
benefit related to stock compensation of approximately $14 million recorded during January 2017.

F-5

RESULTS OF OPERATIONS

The following provides a comparative discussion of the Corporation's consolidated results of operations for 2016 compared 
to 2015. A comparative discussion of results for 2015 compared to 2014 is provided at the end of this section. For a discussion of 
the Critical Accounting Policies that affect the Consolidated Results of Operations, see the "Critical Accounting Policies" section 
of this Financial Review.

ANALYSIS OF NET INTEREST INCOME

(dollar amounts in millions)
Years Ended December 31

Commercial loans
Real estate construction loans
Commercial mortgage loans
Lease financing
International loans
Residential mortgage loans
Consumer loans

Total loans (b) (c)

Mortgage-backed securities
Other investment securities

Total investment securities (d)

Interest-bearing deposits with banks
Other short-term investments
Total earning assets

Cash and due from banks
Allowance for loan losses
Accrued income and other assets

Total assets

Money market and interest-bearing checking deposits
Savings deposits
Customer certificates of deposit
Foreign office time deposits (e)

Total interest-bearing deposits

Short-term borrowings
Medium- and long-term debt (f)

Total interest-bearing sources

Noninterest-bearing deposits
Accrued expenses and other liabilities
Total shareholders’ equity

Total liabilities and shareholders’ equity

Net interest income/rate spread

Impact of net noninterest-bearing sources of funds
Net interest margin (as a percentage of average earning

assets) (b) (d)

2016

2015

2014

Average
Rate (a)

Average
Balance

Interest

Average
Rate (a)

Average
Balance

Interest

Interest

Average
Balance
$ 31,062 $ 1,008
91
314
18
50
71
83
1,635

2,508
8,981
684
1,367
1,894
2,500
48,996

3.26% $ 31,501 $
3.63
3.49
2.65
3.63
3.76
3.32
3.34

1,884
8,697
783
1,441
1,878
2,444
48,628

203
44
247

26
1
1,909

2.19
1.51
2.02

0.51
0.61
2.88

27
0.11
— 0.02
13
0.40
— 0.35
40
0.14
— 0.45
1.45
72
0.34
112

9,356
2,992
12,348

5,099
102
66,545

1,146
(730)
4,782
$ 71,743

$ 22,744
2,013
3,200
33
27,990
138
4,917
33,045

29,751
1,273
7,674
$ 71,743

9,113
1,124
10,237

6,158
106
65,129

1,059
(621)
4,680
$ 70,247

$ 24,073
1,841
4,209
116
30,239
93
2,905
33,237

28,087
1,389
7,534
$ 70,247

962
66
296
25
51
71
80
1,551

202
14
216

16
1
1,784

26
—
16
1
43
—
52
95

Average
Rate (a)
3.12%
3.41
3.75
2.33
3.65
3.82
3.20
3.28

2.33
0.45
2.26

0.26
0.57
2.85

0.11
0.03
0.36
0.82
0.15
0.04
1.68
0.29

923
65
327
19
50
68
73
1,525

209
2
211

14
—
1,750

24
1
18
2
45
—
50
95

3.07% $ 29,715 $
3.48
3.41
3.17
3.58
3.77
3.26
3.20

1,909
8,706
834
1,376
1,778
2,270
46,588

8,970
380
9,350

5,513
109
61,560

934
(601)
4,443
$ 66,336

$ 22,891
1,744
4,869
261
29,765
200
2,963
32,928

25,019
1,016
7,373
$ 66,336

2.24
1.25
2.13

0.26
0.81
2.75

0.11
0.02
0.37
1.02
0.14
0.05
1.80
0.29

2.46

0.14

$ 1,797

2.54

0.17

$ 1,689

2.71%  

2.60%  

$ 1,655

2.56

0.14

2.70%

(a)  Average rate is calculated on a fully taxable equivalent (FTE) basis using a federal tax rate of 35%. The FTE adjustment to net interest income was $4 

million in each of the three years presented.

(b)  Accretion of the purchase discount on the acquired loan portfolio of $4 million, $7 million and $34 million in 2016, 2015 and 2014, respectively, increased 

the net interest margin by 1 basis point in both 2016 and 2015 and 6 basis points in 2014.

(c)  Nonaccrual loans are included in average balances reported and in the calculation of average rates.
(d) 

Includes investment securities available-for-sale and investment securities held-to-maturity. Average rate based on average historical cost. Carrying value 
exceeded average historical cost by $143 million, $100 million and $12 million in 2016, 2015 and 2014, respectively.
Includes substantially all deposits by foreign depositors; deposits are primarily in excess of $100,000.

(e) 
(f)  Medium- and long-term debt average balances included $162 million, $160 million and $192 million in 2016, 2015 and 2014, respectively, for the gain 
attributed to the risk hedged with interest rate swaps. Interest expense on medium-and long-term debt was reduced by $60 million, $70 million, and $72 
million in 2016, 2015 and 2014, respectively, for the net gains on these fair value hedge relationships.

F-6

 
 
 
 
 
RATE/VOLUME ANALYSIS

(in millions)
Years Ended December 31

Interest Income:

Commercial loans

Real estate construction loans

Commercial mortgage loans

Lease financing

International loans

Residential mortgage loans

Consumer loans

 Total loans

Mortgage-backed securities

Other investment securities

 Total investment securities (c)

Interest-bearing deposits with banks

Other short-term investments

Total interest income

Interest Expense:

Money market and interest-bearing checking deposits

Savings deposits

Customer certificates of deposit

Foreign office time deposits

Total interest-bearing deposits

Medium- and long-term debt

Total interest expense

Net interest income

$

2016/2015

Increase
(Decrease)
Due to 
Volume (a)

Increase
(Decrease)
Due to Rate

Net
Increase
(Decrease)

Increase
(Decrease)
Due to Rate

2015/2014

Increase
(Decrease)
Due to 
Volume (a)

Net
Increase
(Decrease)

$

$

(14)

$

60

2

8

(4)

1

—

1

68

(4)

3

(1)

15

—

82

2

—

1

(1)

2

9

11

71

23

10

(3)

(2)

—

2

16

5

27

32

(5)

—

43

(1)

—

(4)

—

(5)

11

6

37

$

46

25

18

(7)

(1)

—

3

84

1

30

31

10

—

125

1

—

(3)

(1)

(3)

20

17

$

$

(15)

2

(31)

8

(1)

(1)

1

(37) (b)

(8)

3

(5)

—

—

(42)

—

(1)

1

1

1

3

4

54

(1)

—

(2)

2

4

6

63

1

9

10

2

1

76

2

—

(3)

(2)

(3)

(1)

(4)

$

39

1

(31)

6

1

3

7

26 (b)

(7)

12

5

2

1

34

2

(1)

(2)

(1)

(2)

2

—

34

$

108

$

(46)

$

80

$

(a)  Rate/volume variances are allocated to variances due to volume.
(b)  Reflected a decrease of $27 million in accretion of the purchase discount on the acquired loan portfolio in 2015.
(c) 

Includes investment securities available-for-sale and investment securities held-to-maturity.

NET INTEREST INCOME

Net interest income is the difference between interest earned on assets and interest paid on liabilities. Gains and losses 
related to the effective portion of risk management interest rate swaps that qualify as hedges are included with the interest expense 
of the hedged item. Net interest income comprised 63 percent, 62 percent, and 66 percent of total revenues in 2016, 2015, and 
2014, respectively. The decrease in net interest income as a percentage of total revenues in 2015 was due to an increase in noninterest 
income resulting from a change in the accounting presentation associated with contractual changes to a card program. Refer to the 
Analysis of Net Interest Income and the Rate Volume Analysis tables above for an analysis of net interest income for the years 
ended December 31, 2016, 2015, and 2014 and details of the components of the change in net interest income for 2016 compared 
to 2015 and 2015 compared to 2014.

Net interest income was $1.8 billion in 2016, an increase of $108 million compared to 2015. The increase in net interest 
income resulted primarily from higher yields on loans and Federal Reserve Bank (FRB) deposits, driven mainly by increases in 
short-term rates, and earning asset volume, partially offset by higher funding costs, primarily the result of higher costs on debt 
swapped  to  variable  rate  and  new  Federal  Home  Loan  Bank  (FHLB)  borrowings  in  the  second  quarter  2016.  For  additional 
information regarding medium- and long-term debt, refer to Note 12 to the consolidated financial statements. Average earning 
assets increased $1.4 billion, or 2 percent, primarily reflecting increases of $2.1 billion in average investment securities and $368 
million in average loans, partially offset by a decrease of $1.1 billion in average interest-bearing deposits with banks.

The net interest margin (FTE) in 2016 increased 11 basis points to 2.71 percent, from 2.60 percent in 2015, primarily due 
to higher loan yields and the reinvestment of FRB deposits into higher yielding Treasury securities, partially offset by the impact 
of higher funding costs. The increase in loan yields primarily reflected a benefit from an increase in short-term rates. Average 
balances deposited with the FRB were $4.9 billion and $6.0 billion in 2016 and 2015, respectively, and are included in “interest-

F-7

bearing deposits with banks” on the consolidated balance sheets. Lower yielding FRB deposits decreased net interest margin by 
17 basis points in 2016 and 23 basis points in 2015.

The Corporation utilizes various asset and liability management strategies to manage net interest income exposure to 
interest rate risk. Refer to the “Market and Liquidity Risk” section of this financial review for additional information regarding 
the Corporation's asset and liability management policies.

PROVISION FOR CREDIT LOSSES

The provision for credit losses was $248 million in 2016, compared to $147 million in 2015. The provision for credit 

losses includes both the provision for loan losses and the provision for credit losses on lending-related commitments. 

The provision for loan losses is recorded to maintain the allowance for loan losses at the level deemed appropriate by the 
Corporation to cover probable credit losses inherent in the portfolio. The provision for loan losses was $241 million in 2016, an 
increase of $99 million compared to $142 million in 2015, primarily reflecting increased reserves for Energy and energy-related 
loans recorded in the first quarter 2016, partially offset by improved credit quality in the remainder of the portfolio.

Net loan charge-offs in 2016 increased $46 million to $146 million, or 0.30 percent of average total loans, compared to 
$100 million, or 0.21 percent, in 2015. The increase primarily reflected an increase in charge-offs in Energy and a decrease in 
recoveries in Private Banking, partially offset by decreases in Technology and Life Sciences and Small Business (primarily due 
to the charge-off of a single large credit in 2015).

The provision for credit losses on lending-related commitments is recorded to maintain the allowance for credit losses 
on lending-related commitments at the level deemed appropriate by the Corporation to cover probable credit losses inherent in 
lending-related commitments. The provision for credit losses on lending-related commitments was $7 million in 2016 and $5 
million in 2015. Lending-related commitment charge-offs were $11 million in 2016 and $1 million in 2015.

For further discussion of the allowance for loan losses and the allowance for credit losses on lending-related commitments, 
including the methodology used in the determination of the allowances and an analysis of the changes in the allowances, refer to 
Note 1 to the consolidated financial statements and the "Credit Risk" section of this financial review.

NONINTEREST INCOME

(in millions)
Years Ended December 31
Card fees
Service charges on deposit accounts
Fiduciary income
Commercial lending fees
Letter of credit fees
Bank-owned life insurance
Foreign exchange income
Brokerage fees
Net securities losses
Other noninterest income (b)
Total noninterest income

2016

2015

2014

$

$

303 (a) $
219
190
89
50
42
42
19
(5)
102
1,051

$

276 (a) $
223
187
99
53
40
40
17
(2)
102
1,035

$

81
215
180
98
57
39
40
17
—
130
857

(a)  Effective January 1, 2015, contractual changes to a card program resulted in a change to the accounting presentation of the related revenues and expenses. 

The effect of this change was an increase to card fees of $182 million in 2016 and $177 million in 2015.

(b)  The table below provides further details on certain categories included in other noninterest income.

Noninterest  income  increased  $16  million  to  $1.1  billion  in  2016,  compared  to  $1.0  billion  in  2015. An  analysis  of 

significant year over year changes by individual line item follows.

Card fees consist primarily of interchange and other fees earned on government card programs, commercial cards and 
debit/ATM cards, as well as, beginning in 2015, fees from providing merchant payment processing services. Card fees increased 
$27 million, or 9 percent, to $303 million in 2016, compared to $276 million in 2015. The increase in 2016 was primarily due to 
volume-driven increases from merchant payment processing services and government card programs.

Service charges on deposit accounts decreased $4 million, or 1 percent, to $219 million in 2016, compared to $223 million

in 2015. The decrease in 2016 primarily reflected a decrease in retail service charges.

Fiduciary income increased $3 million, or 1 percent, to $190 million in 2016, compared to $187 million in 2015. Personal 
trust fees, institutional trust fees and investment advisory fees are the three major components of fiduciary income. These fees are 
based on services provided, assets under management and assets under administration. Fluctuations in the market values of the 
underlying assets managed or administered, which include both equity and fixed income securities, and net asset flows within 

F-8

client accounts impact fiduciary income. The increase in 2016 was primarily due to an increase in institutional trust fees, largely 
driven by net asset inflows and increased activity in securities lending services.

Commercial lending fees decreased $10 million, or 11 percent, to $89 million in 2016, compared to $99 million in 2015, 
primarily reflecting a decrease in unused commitment fees, largely due to a decline in Energy commitments, and a decrease in 
syndication agent fees.

Letter of credit fees decreased $3 million, or 4 percent, to $50 million in 2016, compared to $53 million in 2015. The 

decrease in 2016 was primarily due to pricing actions taken based on changes in regulatory rules.

Other noninterest income was unchanged at $102 million in 2016, compared to 2015. The following table illustrates 

certain categories included in "other noninterest income" on the consolidated statements of income.

(in millions)
Years Ended December 31
Customer derivative income
Insurance commissions
Investment banking fees
Income from principal investing and warrants
Securities trading income
Deferred compensation asset returns (a)
Income from unconsolidated subsidiaries
All other noninterest income
Other noninterest income

2016

2015

2014

27
10
7
7
6
3
(2)
44
102

$

$

18
10
12
6
9
—
2
45
102

$

$

22
13
18
10
9
6
8
44
130

$

$

(a)  Compensation deferred by the Corporation's officers and directors is invested based on investment selections of the officers and directors. 
Income earned on these assets is reported in noninterest income and the offsetting change in liability is reported in salaries and benefits 
expense.

The increase in customer derivative income primarily reflected an increase in income from interest rate derivative contracts, 
in part due to net favorable derivative credit valuation adjustments in 2016, compared to net unfavorable adjustments in 2015. The 
decline in investment banking fees was largely due to decreased activity in the energy markets, while income from unconsolidated 
subsidiaries reflected the termination of a joint venture with a payment processor in the second quarter 2015 and was more than 
offset by the increase in merchant payment processing services revenue included in card fees.

NONINTEREST EXPENSES

(in millions)
Years Ended December 31
Salaries and benefits expense
Outside processing fee expense
Net occupancy expense
Equipment expense
Restructuring expense
Software expense
FDIC insurance expense
Advertising expense
Litigation-related expense
Gain on debt redemption
Other noninterest expenses

Total noninterest expenses

2016

2015

2014

$

$

961
336 (a)
157
53
93
119
54
21
1
—
135
1,930

$

1,009

$

318 (a)
159
53
—
99
37
24
(32)
—
160
1,827

$

$

980
111
171
57
—
95
33
23
4
(32)
173
1,615

(a)  Effective January 1, 2015, contractual changes to a card program resulted in a change to the accounting presentation of the related revenues and expenses. 

The effect of this change was an increase to outside processing fee expense of $182 million in 2016 and $177 million in 2015.

Noninterest expenses increased $103 million to $1.9 billion in 2016, compared to $1.8 billion in 2015. Excluding $93 
million of restructuring charges related to the GEAR Up initiative and $33 million from the net release of litigation reserves in 
2015, noninterest expenses decreased $23 million, or 1 percent, in 2016. An analysis of significant increases and decreases by 
individual line item is presented below.

Salaries and benefits expense decreased $48 million, or 5 percent, to $961 million in 2016, compared to $1.0 billion in 
2015. The decrease in salaries and benefits included GEAR Up savings estimated to be in excess of $25 million as well as an 
additional decrease in pension expense, partially offset by the impact of merit increases and one additional day in 2016.

F-9

 
Outside processing fee expense increased $18 million to $336 million in 2016, compared to $318 million in 2015, primarily 
due to volume-driven increases related to processing for merchant services, a retirement savings program and other revenue-
generating activities, as well as increases in certain outsourced services.

Restructuring charges in 2016 associated with the implementation of the GEAR Up initiative included $52 million of 
employee costs, $15 million of facilities costs and $26 million of other charges. For further information about restructuring charges, 
refer to Note 22 to the consolidated financial statements.

Software expense increased $20 million to $119 million in 2016, compared to $99 million in 2015, primarily reflecting 

continued investment in the Corporation's technology infrastructure.

FDIC insurance premiums increased $17 million to $54 million in 2016, compared to $37 million in 2015, in part due to 
federal rules implemented on July 1, 2016 in order to increase the statutorily required minimum level of the Deposit Insurance 
Fund, as well as higher risk-based assessment rates (due largely to impacts from the energy cycle) and an increase in the assessment 
base.

Litigation-related expense increased $33 million, reflecting the benefit to 2015 from the release of $33 million of litigation 

reserves. For further information about legal proceedings, refer to Note 21 to the consolidated financial statements.

Other noninterest expenses decreased $25 million, or 16 percent, to $135 million in 2016, from $160 million in 2015, 
primarily reflecting a $9 million decrease in state business taxes and a $6 million increase in gains from the early termination of 
certain leveraged lease transactions, as well as smaller decreases in many other categories.

INCOME TAXES AND RELATED ITEMS

The provision for income taxes was $193 million in 2016, compared to $229 million in 2015. The $36 million decrease 
in the provision for income taxes in 2016, compared to 2015, was due primarily to the decrease in pretax income as well as a $10 
million increase in tax benefits from the early termination of certain leveraged leases.

Net deferred tax assets were $217 million at December 31, 2016, compared to $199 million at December 31, 2015. The 
increase of $18 million resulted primarily from increases in deferred tax assets related to the allowance for loan losses and net 
unrealized losses on investment securities available-for-sale and a decrease in deferred tax liabilities related to lease financing 
transactions, partially offset by a decrease in unrealized losses related to defined benefit plans and a decrease related to stock-
based compensation. Deferred tax assets of $463 million were evaluated for realization and it was determined that a valuation 
allowance of $3 million, related to state net operating loss carryforwards, was needed at both December 31, 2016 and December 31, 
2015. These conclusions were based on available evidence of loss carryback capacity, projected future reversals of existing taxable 
temporary differences and assumptions made regarding future events.

2015 RESULTS OF OPERATIONS COMPARED TO 2014

Net interest income was $1.7 billion in 2015, an increase of $34 million compared to 2014. The increase in net interest 
income in 2015 resulted primarily from higher earnings asset volume, partially offset by lower loan and investment yields. Lower 
loan yields were in part due to a $27 million decrease in the accretion of the purchase discount on the acquired loan portfolio, 
continued pressure on yields from the low-rate environment and changing loan portfolio dynamics.

The net interest margin (FTE) in 2015 decreased 10 basis points to 2.60 percent, from 2.70 percent in 2014, primarily 
due to lower loan yields and an increase in average balances deposited with the FRB, partially offset by higher average loan 
balances. The decrease in loan yields primarily reflected unfavorable portfolio dynamics and a decrease in accretion on the acquired 
loan portfolio, shifts in the average loan portfolio mix and the impact of a competitive low-rate environment, partially offset by a 
benefit from an increase in short-term rates. Accretion of the purchase discount on the acquired loan portfolio increased the net 
interest margin by 1 basis point in 2015, compared to 6 basis points in 2014. The "Analysis of Net Interest Income" and "Rate/
Volume Analysis" tables under the "Net Interest Income" subheading in this section above provide an analysis of net interest 
income for 2015 and 2014 and details the components of the change in net interest income for 2015 compared to 2014.

The provision for credit losses, which includes both the provision for loan losses and the provision for credit losses on 
lending-related commitments, was $147 million in 2015, compared to $27 million in 2014. The provision for loan losses was $142 
million in 2015 compared to $22 million in 2014. The increase primarily reflected increased provisions for Energy and energy-
related loans, Technology and Life Sciences, Corporate Banking and Small Business. Net loan charge-offs in 2015 increased $75 
million to $100 million, or 0.21 percent of average total loans, compared to $25 million, or 0.05 percent, in 2014. The increase 
primarily reflected increases in Energy, general Middle Market (largely due to an increase in charge-offs on energy-related loans), 
Small Business (primarily due to the charge-off of a single large credit in 2015), Corporate Banking and Technology and Life 
Sciences, partially offset by an increase in net recoveries in Private Banking. The provision for credit losses on lending-related 
commitments  was  $5  million  in  both  2015  and  2014.  Lending-related  commitment  charge-offs  were  $1  million  in  2015  and 
insignificant in 2014.

F-10

Noninterest income increased $178 million to $1.0 billion in 2015, compared to $857 million in 2014. Excluding the 
$177 million impact of the change in accounting presentation on card fees as described in footnote (a) to the table provided under 
the "Noninterest Income" subheading previously in this section, noninterest income increased $1 million. Card fees increased $195 
million to $276 million in 2015, compared to $81 million in 2014. Two significant developments impacted the comparability of 
card fees between 2015 and 2014. First, the Corporation entered into a new contract for an existing card program effective January 
1, 2015, which resulted in the Corporation recognizing an additional $177 million of revenue related to card fees in 2015, with a 
corresponding amount being recorded to outside processing fees expense. Second, the Corporation changed its business model 
for providing merchant payment processing services, resulting in $17 million of additional revenue in 2015. Service charges on 
deposit accounts increased $8 million, or 4 percent, in 2015, primarily due to increased commercial service charges. Fiduciary 
income increased $7 million, or 4 percent in 2015, primarily due to an increase in investment advisory fees, largely driven by net 
asset inflows, as brokerage clients continued to transition from transactional services to investment advisory services, and the 
favorable impact on fees from market value increases. Letter of credit fees decreased $4 million, or 7 percent in 2015, primarily 
due to regulatory-driven decreases in the volume of letters of credit outstanding. Other noninterest income decreased $28 million, 
or 22 percent, in 2015, compared to 2014. The decrease primarily reflected decreases in investment banking fees, income from 
unconsolidated subsidiaries and deferred compensation plan asset returns. The decline in investment banking fees was largely due 
to decreased activity in the energy market. Income from unconsolidated subsidiaries reflected a decrease of $11 million in income 
from the merchant payment processing joint venture that concluded in the second quarter 2015, partially offset by a decrease in 
tax credit investment amortization expense. The decrease in deferred compensation plan asset returns was offset by a decrease in 
deferred compensation expense in salaries and benefits expense. Refer to the table provided under the “Noninterest Income” 
subheading previously in this section for the details of certain categories included in other noninterest income.

Noninterest expenses increased $212 million in 2015, compared to 2014. Excluding the $177 million impact of the change 
in accounting presentation on outside processing fees as described in footnote (a) to the table provided under the "Noninterest 
Expense" subheading previously in this section, noninterest expenses increased $35 million, or 2 percent. Salaries and benefits 
expense increased $29 million, or 3 percent, in 2015, primarily due to an increase in technology-related contract labor expenses, 
the impact of merit increases and higher defined benefit pension expense, partially offset by decreases in deferred compensation 
plan expense and lower severance and executive incentive compensation expense. Outside processing fee expense increased $207 
million, to $318 million, in 2015. Excluding the impact of the above-described change in accounting principle, outside processing 
fee expense increased $29 million, or 24 percent, primarily due to increased third-party processing expenses, including up-front 
costs related to the new business model for providing merchant payment processing services, as well as an increase related to a 
retirement savings program and other expenses related to revenue-generating activities. Net occupancy and equipment expense 
decreased $16 million, or 7 percent, in 2015, primarily the result of lease termination charges of $10 million taken in 2014 as well 
as the 2015 benefit from those real estate optimization actions. Litigation-related expenses decreased $36 million in 2015, reflecting 
the release of $33 million of litigation reserves in 2015. The Corporation recognized a gain on debt redemption of $32 million in 
2014 on the early redemption of a $150 million subordinated note, primarily from the recognition of the unamortized value of a 
related, previously terminated interest rate swap. Other noninterest expenses decreased $13 million, or 7 percent, in 2015, primarily 
reflecting a decrease in charitable contributions to the Comerica Charitable Foundation in 2015.

The provision for income taxes decreased $48 million to $229 million in 2015, primarily due to a decrease in pretax 

income as well as a $5 million tax benefit from the early termination of certain leveraged leases.

F-11

STRATEGIC LINES OF BUSINESS

The Corporation's operations are strategically aligned into three major business segments: the Business Bank, the Retail 
Bank and Wealth Management. These business segments are differentiated based upon the products and services provided. In 
addition to the three major business segments, Finance is also reported as a segment. The Other category includes items not directly 
associated with these business segments or the Finance segment. The performance of the business segments is not comparable 
with the Corporation's consolidated results and is not necessarily comparable with similar information for any other financial 
institution. Additionally, because of the interrelationships of the various segments, the information presented is not indicative of 
how  the  segments  would  perform  if  they  operated  as  independent  entities.  Market  segment  results  are  also  provided  for  the 
Corporation's three primary geographic markets: Michigan, California and Texas. In addition to the three primary geographic 
markets,  Other  Markets  is  also  reported  as  a  market  segment.  Note  23  to  the  consolidated  financial statements  describes  the 
Corporation's segment reporting methodology as well as the business activities of each business segment and presents financial 
results of these business segments for the years ended December 31, 2016, 2015 and 2014.

The Corporation's management accounting system assigns balance sheet and income statement items to each segment 
using certain methodologies, which are regularly reviewed and refined. These methodologies may be modified as the management 
accounting system is enhanced and changes occur in the organizational structure and/or product lines. Effective January 1, 2016, 
in conjunction with the effective date for regulatory Liquidity Coverage Ratio (LCR) requirements, the Corporation prospectively 
implemented an additional funds transfer pricing (FTP) charge, primarily for the cost of maintaining liquid assets to support 
potential draws on unfunded loan commitments and for the long-term economic cost of holding collateral for secured deposits. 

BUSINESS SEGMENTS

The following table presents net income (loss) by business segment. 

(dollar amounts in millions)
Years Ended December 31
Business Bank
Retail Bank
Wealth Management

Finance
Other (a)
Total

2016

2015

2014

$

$

638
7
76
721
(244)
—
477

88% $
1
11
100%

$

762
47
85
894
(373)
—
521

85% $
5
10
100%

$

822
44
84
950
(359)
2
593

86%
5
9
100%

(a)  Includes items not directly associated with the three major business segments or the Finance Division.

The Business Bank's net income of $638 million in 2016 decreased $124 million, compared to $762 million in 2015. Net 
interest income of $1.4 billion decreased $80 million in 2016, primarily reflecting an increase in net funds transfer pricing (FTP) 
charges, partially offset by the benefit provided by an increase in average loans of $184 million and one additional day in 2016.  
The increase in net FTP charges primarily reflected an increase in the cost of funds due to the increase in short-term market rates, 
lower funding credits due to a $1.2 billion decrease in average deposits, and the new 2016 FTP charges for LCR as described 
above. The  increase  in  average  loans  primarily  reflected  increases  in  Commercial  Real  Estate,  National  Dealer  Services  and 
Mortgage Banker Finance, partially offset by decreases in general Middle Market, Energy and Corporate Banking. The decrease 
in average deposits primarily reflected purposeful pricing discipline and strategic actions in light of new liquidity coverage ratio 
rules, with the largest declines in Municipalities, Corporate Banking and the Financial Services Division. The provision for credit 
losses increased $59 million, to $217 million in 2016, compared to the prior year. The increase in the provision was primarily due 
to the increase in reserves for Energy and energy-related loans recorded in the first quarter of 2016. Corporate Banking and general 
Middle Market also contributed to the increase in the provision. These increases were partially offset by improvements in credit 
quality in the remainder of the portfolio. Net credit-related charge-offs of $145 million increased $66 million in 2016, compared 
to 2015, primarily reflecting an increase in Energy, partially offset by a decrease in Technology and Life Sciences. Noninterest 
income of $572 million in 2016 increased $1 million from the prior year, primarily reflecting a $19 million increase in card fees, 
partially offset by decreases of $11 million in commercial lending fees, $5 million in income from unconsolidated subsidiaries 
(largely related to the exit in the second quarter 2015 from a joint venture that provided merchant payment processing services), 
and $4 million in investment banking fees. Noninterest expenses of $839 million in 2016 increased $61 million compared to the 
prior year. Excluding restructuring charges of $43 million and the impact of a $30 million net release of litigation reserves in 2015, 
noninterest expenses decreased $12 million. The decrease was primarily due to a $12 million decrease in salaries and benefits, 
largely reflecting savings related to the GEAR Up initiative, an $8 million increase in gains, primarily from early terminations of 
certain leveraged lease transactions, and smaller decreases in several other noninterest expense categories, partially offset by 
increases of $8 million in outside processing fees, $6 million in allocated corporate overhead expense, largely due to increased 
technology expense, and $6 million in FDIC insurance expense. 

F-12

 
 
 
Net income for the Retail Bank of $7 million in 2016 decreased $40 million, compared to $47 million in 2015. Net interest 
income of $622 million decreased $4 million in 2016, primarily reflecting higher net FTP funding charges, reflecting higher FTP 
funding costs and the new FTP charges related to LCR, as well as lower FTP credits reflecting a lower deposit crediting rate, 
partially offset by the benefit provided by a $682 million increase in average deposits, an $89 million increase in average loans 
and one additional day in 2016. The provision for credit losses increased $27 million to $35 million in 2016, compared to $8 
million in 2015, primarily reflecting an increase in Small Business. Net credit-related charge-offs of $12 million in 2016 decreased 
$17 million, compared to $29 million in 2015, mostly due to a charge-off of a single credit in Small Business in 2015. Noninterest 
income of $189 million in 2016 increased $4 million compared to 2015, primarily due to a $6 million increase in card fees and 
small increases in several other fee categories, partially offset by $4 million increase in securities losses and a $3 million decrease 
in service charges on deposit accounts. Noninterest expenses of $767 million in 2016 increased $33 million from the prior year. 
Excluding  restructuring  charges  of  $38  million,  noninterest  expense  decreased  $5  million,  primarily  reflecting  a  $14  million 
decrease in salaries and benefits, largely reflecting savings related to the GEAR Up initiative, and smaller decreases in other 
noninterest expense categories, partially offset by increases of $11 million in allocated corporate overhead expense, $4 million in 
outside processing expense and $4 million in FDIC insurance expense.

Wealth Management's net income of $76 million in 2016 decreased $9 million, compared to $85 million in 2015. Net 
interest income of $169 million in 2016 decreased $10 million compared to 2015, primarily reflecting an increase in net FTP 
funding charges due to an increase in the cost of funds and a lower FTP deposit crediting rate, partially offset by the benefit from 
a $95 million increase in average loans. Average deposits decreased $25 million. The provision for credit losses was a benefit of 
$4 million in 2016, compared to a benefit of $20 million in 2015, primarily due to the benefit to the prior year from net recoveries 
in Private Banking. There were no net credit-related charge-offs in 2016, compared to net recoveries of $17 million in 2015. 
Noninterest income of $243 million increased $8 million from the prior year, primarily reflecting a $3 million increase in fiduciary 
income, a $2 million securities loss in 2015, and small increases in several other categories of noninterest income. Noninterest 
expenses  of  $301  million  in  2016  decreased  $4  million  from  the  prior  year.  Excluding  restructuring  charges  of  $12  million, 
noninterest expenses decreased $16 million, primarily reflecting an $8 million decrease in salaries and benefits expense, largely 
reflecting savings related to the GEAR Up initiative, and smaller decreases in several other noninterest expense categories, partially 
offset by a $3 million increase in allocated corporate overhead expenses.

The net loss in the Finance segment was $244 million in 2016, compared to a net loss of $373 million in 2015. Net interest 
expense of $435 million in 2016 decreased $194 million, compared to 2015, primarily reflecting a decrease in net FTP expense 
as a result of higher rates charged to the business segments under the Corporation's internal FTP methodology, as well as an increase 
due to a larger investment securities portfolio. 

MARKET SEGMENTS

The table and narrative below present the market segment results, including prior periods, based on the structure and 
methodologies in effect at December 31, 2016. Note 23 to these consolidated financial statements presents a description of each 
of these market segments as well as the financial results for the years ended December 31, 2016, 2015 and 2014. 

The following table presents net income (loss) by market segment. 

(dollar amounts in millions)
Years Ended December 31
Michigan
California
Texas
Other Markets

Finance & Other (a)

Total

$

$

2016

2015

2014

247
270
(21)
225
721
(244)
477

34% $
38
(3)
31
100%

$

324
295
78
197
894
(373)
521

36% $
33
9
22
100%

$

287
272
167
224
950
(357)
593

30%
28
18
24
100%

(a)  Includes items not directly associated with the market segments.

The Michigan market's net income of $247 million in 2016 decreased $77 million, compared to net income of $324 
million in 2015. Net interest income of $672 million in 2016 decreased $43 million, primarily due to an increase in net FTP funding 
charges, reflecting higher FTP funding costs and the new FTP charges related to LCR, as well as lower FTP credits reflecting a 
lower deposit crediting rate and the impact of a $566 million decrease in average loans and a $66 million decrease in average 
deposits, partially offset by one more day in 2016. The decrease in average loans resulted primarily from a decrease in general 
Middle Market, partially offset by an increase in National Dealer Services. The decrease in average deposits primarily reflected 
decreases in general Middle Market, Corporate Banking and Private Banking, partially offset by an increase in Retail Banking. 
The provision for credit losses was $9 million in 2016, an increase of $36 million compared to a benefit of $27 million in the prior 
year. The increase in the provision primarily reflected increases in Corporate Banking and Small Business, partially offset by a 
decrease in general Middle Market. Net credit related charge-offs were $15 million for 2016, compared to $8 million in the prior 

F-13

 
 
year, primarily reflecting an increase in Corporate Banking, partially offset by decreases in general Middle Market and Commercial 
Real Estate. Noninterest income of $320 million in 2016 decreased $9 million from 2015, primarily reflecting small decreases in 
several noninterest income categories, partially offset by a $5 million increase in card fees. Noninterest expenses of $620 million
in 2016 increased $26 million from the prior year. Excluding restructuring charges of $24 million and the impact of a $30 million 
net release of litigation reserves in 2015, noninterest expense decreased $28 million, primarily reflecting a $10 million decrease 
in salaries and benefits, largely reflecting savings related to the GEAR Up initiative, an $8 million increase in gains, primarily 
from early terminations of certain leveraged lease transactions, and smaller decreases in most other noninterest expense categories.

The California market's net income of $270 million decreased $25 million in 2016, compared to $295 million in 2015.  
Net interest income of $715 million for 2016 decreased $17 million from the prior year, primarily due to an increase in net FTP 
funding charges, primarily for the same reasons as discussed above, partially offset by the benefits provided by a $1.0 billion
increase in average loans and one more day in 2016. Average deposits decreased $355 million. The increase in average loans 
reflected increases in nearly all lines of business, with the largest increases in National Dealer Services and Commercial Real 
Estate. The decrease in average deposits primarily reflected decreases in general Middle Market, Technology and Life Sciences 
and Corporate Banking, partially offset by an increase in Retail Banking. The provision for credit losses of $21 million in 2016
increased $4 million from the prior year, primarily reflecting an increase in general Middle Market, partially offset by a decrease 
in Technology and Life Sciences. Net credit-related charge-offs of $26 million in 2016 increased $8 million compared to 2015, 
primarily reflecting increases in general Middle Market and Private Banking, partially offset by a decrease in Technology and Life 
Sciences. Noninterest income of $162 million in 2016 increased $12 million from the prior year, primarily due to increases of $5 
million each in card fees and warrant income. Noninterest expenses of $434 million in 2016 increased $29 million from the prior 
year. Excluding restructuring charges of $26 million, noninterest expense increased $3 million, primarily reflecting a $7 million 
increase in allocated corporate overhead expense, partially offset by a $5 million decrease in salaries and benefits, largely reflecting 
savings related to the GEAR Up initiative.

The Texas market's net income decreased $99 million to a net loss of $21 million in 2016, compared to net income of 
$78 million in 2015. Net interest income of $471 million in 2016 decreased $48 million from the prior year, primarily due to an 
increase in net FTP funding charges, for the same reasons as discussed above, as well as the impact of a $531 million decrease in 
average loans and a $714 million decrease in average deposits, partially offset by one additional day in 2016. The decrease in 
average loans primarily reflected decreases in Energy, general Middle Market and Technology and Life Sciences, partially offset 
by an increase in Commercial Real Estate.The decrease in average deposits resulted primarily from decreases in general Middle 
Market, Corporate Banking and Technology and Life Sciences, partially offset by an increase in Retail Banking. The provision 
for credit losses of $225 million in 2016 increased $94 million from the prior year, primarily reflecting increased reserves for 
Energy and energy-related loans in the first quarter 2016, partially offset by a decrease in Technology and Life Sciences. Net 
credit-related charge-offs of $118 million for 2016 increased $72 million from the prior year, primarily reflecting an increase in 
Energy. Noninterest income of $129 million in 2016 decreased $2 million from the prior year, primarily due to a $4 million decrease 
in commercial lending fees and small decreases in several other noninterest income categories, partially offset by a $4 million 
increase in card fees. Noninterest expenses of $408 million in 2016 increased $21 million from 2015. Excluding restructuring 
charges of $27 million, noninterest expense decreased $6 million, primarily due to a $14 million decrease in salaries and benefits, 
largely reflecting savings related to the GEAR Up initiative, and smaller decreases in most noninterest expense categories, partially 
offset by an $11 million increase in allocated corporate overhead expenses.

Net income in Other Markets of $225 million in 2016 increased $28 million compared to $197 million in 2015. Net 
interest income of $351 million in 2016 increased $14 million from the prior year, primarily due to the FTP benefit provided by 
a $602 million increase in average deposits and a higher deposit crediting rate, the benefit provided from an increase in average 
loans of $504 million and one additional day in 2016, partially offset by higher FTP funding costs. The increase in average loans 
primarily reflected increases in Mortgage Banker Finance, Technology and Life Sciences and Commercial Real Estate, partially 
offset by a decrease in Corporate Banking. Average deposits increased in nearly all business lines, with the largest increases in 
Technology and Life Sciences, Corporate Banking, general Middle Market and Mortgage Banker Finance. The provision for credit 
losses was a benefit of $7 million in 2016, a decrease of $32 million compared to a provision of $25 million in the prior year, 
reflecting decreases in almost all business lines, with the largest declines in Small Business and Corporate Banking, partially offset 
by an increase in Private Banking. Net loan charge-offs were $4 million in 2016, a decrease of $25 million compared to 2015, 
primarily reflecting decreases in Small Business and Corporate Banking, partially offset by an increase in Private Banking, primarily 
due to a benefit from net loan recoveries in the prior year. Noninterest income of $393 million in 2016 increased $12 million from 
the prior year, primarily reflecting a $12 million increase in card fees and smaller increases in other noninterest income categories, 
partially offset by a $4 million decrease in warrant income. Noninterest expenses of $445 million in 2016 increased $14 million
compared to the prior year. Excluding restructuring charges of $16 million, noninterest expense decreased $2 million, primarily 
due to a $5 million decrease in salaries and benefits, largely reflecting savings related to the GEAR Up initiative, and smaller 
decreases in other noninterest expense categories, partially offset by a $14 million increase in outside processing expense related 
to revenue generating activities. 

F-14

The net loss for the Finance & Other category of $244 million in 2016 decreased $129 million compared to 2015. For 

further information, refer to the Finance segment discussion in the "Business Segments" subheading above.

The following table lists the Corporation's banking centers by geographic market segment. 

December 31
Michigan
Texas
California
Other Markets:
Arizona
Florida
Canada

Total Other Markets

Total

2016

2015

2014

209
127
97

17
7
1
25
458

214
133
103

19
7
1
27
477

214
135
104

18
9
1
28
481

F-15

BALANCE SHEET AND CAPITAL FUNDS ANALYSIS

ANALYSIS OF INVESTMENT SECURITIES AND LOANS

(in millions)
December 31
Investment securities available-for-sale:

2016

2015

2014

2013

2012

U.S. Treasury and other U.S. government agency securities $ 2,779
7,872
Residential mortgage-backed securities (a)
7
State and municipal securities
—
Corporate debt securities
129
Equity and other non-debt securities
10,787

Total investment securities available-for-sale

Investment securities held to maturity:

Residential mortgage-backed securities (a)

Total investment securities

Commercial loans
Real estate construction loans
Commercial mortgage loans
Lease financing
International loans:

Banks and other financial institutions
Commercial and industrial

Total international loans

Residential mortgage loans
Consumer loans:
Home equity
Other consumer

Total consumer loans
Total loans

$ 2,763
7,545
9
1
201
10,519

1,981
$ 12,500
$ 31,659
2,001
8,977
724

—
1,368
1,368
1,870

$

526

$

7,274 (b)
23
51
242
8,116

1,935 (b)

$ 10,051
$ 31,520
1,955
8,604
805

31
1,465
1,496
1,831

45
8,926
22
56
258
9,307

—
$ 9,307
$ 28,815
1,762
8,787
845

4
1,323
1,327
1,697

$

35
9,920
23
58
261
10,297

—
$ 10,297
$ 29,513
1,240
9,472
859

2
1,291
1,293
1,527

1,582
$ 12,369
$ 30,994
2,869
8,931
572

2
1,256
1,258
1,942

1,800
722
2,522
$ 49,088

1,720
765
2,485
$ 49,084

1,658
724
2,382
$ 48,593

1,517
720
2,237
$ 45,470

1,537
616
2,153
$ 46,057

(a)  Issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
(b)  During the fourth quarter 2014, the Corporation transferred residential mortgage-backed securities from available-for-sale to held-to-

maturity.

F-16

EARNING ASSETS

Loans

On a period-end basis, total loans were unchanged at $49.1 billion at December 31, 2016 and 2015. Average total loans 
increased $368 million, or 1 percent, to $49.0 billion in 2016, compared to $48.6 billion in 2015. The following tables provide 
information about the changes in the Corporation's average loan portfolio in 2016, compared to 2015.

(dollar amounts in millions)
Years Ended December 31
Average Loans:
Commercial loans by business line:

General Middle Market
National Dealer Services
Energy
Technology and Life Sciences
Environmental Services
Entertainment

Total Middle Market
Corporate Banking
Mortgage Banker Finance
Commercial Real Estate

Total Business Bank commercial loans
Total Retail Bank commercial loans
Total Wealth Management commercial loans

Total commercial loans
Real estate construction loans
Commercial mortgage loans
Lease financing
International loans
Residential mortgage loans
Consumer loans:
Home equity
Other consumer

Consumer loans

Total loans

Average Loans By Geographic Market:
Michigan
California
Texas
Other Markets

Total loans

$

$

$

$

2016

2015

Change

Percent
Change

9,759
4,728
2,736
3,061
844
665
21,793
2,863
2,180
913
27,749
1,910
1,403
31,062
2,508
8,981
684
1,367
1,894

1,767
733
2,500
48,996

12,614
17,574
10,637
8,171
48,996

$

$

$

$

10,289
4,333
3,365
2,933
845
618
22,383
3,088
1,843
884
28,198
1,931
1,372
31,501
1,884
8,697
783
1,441
1,878

1,693
751
2,444
48,628

13,180
16,613
11,168
7,667
48,628

$

$

$

$

(530)
395
(629)
128
(1)
47
(590)
(225)
337
29
(449)
(21)
31
(439)
624
284
(99)
(74)
16

74
(18)
56
368

(566)
961
(531)
504
368

(5)%
9
(19)
4
—
8
(3)
(7)
18
3
(2)
(1)
2
(1)
33
3
(13)
(5)
1

4
(2)
2
1 %

(4)%
6
(5)
7
1 %

 Middle Market business lines generally serve customers with annual revenue between $20 million and $500 million. 
National Dealer Services primarily provides floor plan inventory financing to auto dealerships, and the $395 million increase in 
average National Dealer Services commercial loans largely reflected the continued strong new car sales activity in 2016 and 
expansion of existing relationships. Customers in the Energy business line are engaged in three segments of the oil and gas business: 
exploration and production (E&P), midstream and energy services. The $629 million decrease in average Energy commercial 
loans in 2016, compared to 2015, primarily reflected Energy customers taking actions to reduce their bank borrowings through 
asset sales, capital market activities and reduced capital expenditures. For more information on Energy and related loans, refer to 
"Energy Lending" in the "Risk Management section of this financial review. The Technology and Life Sciences business line 
serves two segments: (1) private equity and venture capital firms, referred to as equity fund services, and (2) companies that are 
typically owned by venture-capital firms, where significant equity is invested to create products and build companies around new 
intellectual property. The $128 million increase in average Technology and Life Sciences commercial loans primarily reflected 
growth of $321 million in equity fund services, where the line of business provides capital call or subscription lines, along with 
other financial services. 

F-17

 
Corporate Banking generally serves customers with revenue over $500 million, and the $225 million decrease in average 
Corporate Banking commercial loan balances generally reflected the Corporation's continued pricing and structure discipline in 
the competitive environment. Mortgage Banker Finance provides short-term, revolving lines of credit to independent mortgage 
banking companies and therefore balances tend to reflect the level of home sales and refinancing activity in the market as a whole. 
The $337 million increase in average Mortgage Banker Finance commercial loans reflected higher average home sales volume 
and increased refinancing activity in 2016, compared to 2015, as well as new and expanded relationships. 

Commercial  real  estate  loans  comprise  real  estate  construction  loans  and  commercial  mortgage  loans.  Real  estate 
construction loans primarily include loans in the Commercial Real Estate business line, which generally serves commercial real 
estate developers. Commercial mortgage loans are loans where the primary collateral is a lien on any real property and are primarily 
loans secured by owner occupied real estate. Real property is generally considered primary collateral if the value of that collateral 
represents more than 50 percent of the commitment at loan approval. The $908 million increase in average commercial real estate 
loans primarily reflected construction draws and term financing, mainly with existing customers who are proven developers on 
projects with favorable risk profiles.

ANALYSIS OF INVESTMENT SECURITIES PORTFOLIO (FTE)

(dollar amounts in millions)

December 31, 2016

Within 1 Year

1 - 5 Years

5 - 10 Years

After 10 Years

Total

Maturity (a)

Weighted
Average
Maturity

Amount

Yield

Amount

Yield

Amount

Yield

Amount

Yield Amount

Yield

Years

U.S. Treasury and other U.S. government

agency securities

Residential mortgage-backed securities (b)

State and municipal securities (c)

Equity and other non-debt securities:

Auction-rate preferred securities (d)

Money market and other mutual funds (e)

Total investment securities

$

$

30

—

—

—

—

30

0.83% $ 2,749

1.58% $ —

—% $ — —% $ 2,779

1.57%

—

—

—

—

98

—

—

—

2.10

—

—

—

1,763

2

—

—

2.74

1.83

—

—

7,593

5

1.98

1.83

47

1.52

82 —

9,454

7

47

82

2.12

1.83

1.52

—

3.0

18.0

11.6

—

—

0.83% $ 2,847

1.60% $ 1,765

2.73% $ 7,727

1.98% $12,369

2.00%

14.7

Issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

(a)  Based on final contractual maturity.
(b) 
(c)  Auction-rate securities.
(d)  Auction-rate preferred securities have no contractual maturity; balances are excluded from the calculation of total weighted average maturity.
(e)  Balances are excluded from the calculation of total yield and weighted average maturity.

Investment Securities

Investment securities decreased $131 million to $12.4 billion at December 31, 2016, from $12.5 billion at December 31, 
2015, including a $70 million decline in fair value. Net unrealized losses on investment securities available-for-sale were $42 
million at December 31, 2016, compared to net unrealized gains of $28 million at December 31, 2015. At December 31, 2016, 
the weighted-average expected life of the Corporation's residential mortgage-backed securities portfolio was approximately 4.0
years. On an average basis, investment securities increased $2.1 billion to $12.3 billion in 2016, compared to $10.2 billion in 2015, 
primarily reflecting the purchase of approximately $2.2 billion of U.S. Treasury securities in the fourth quarter 2015, largely from 
the reinvestment of Federal Reserve Bank deposits into higher yielding securities.

As of December 31, 2016, the Corporation's auction-rate securities portfolio was carried at an estimated fair value of $54 
million, compared to $77 million at December 31, 2015. During 2016, auction-rate securities with a par value of $23 million were 
redeemed or sold, resulting in an insignificant amount of net securities gains. As of December 31, 2016, approximately 96 percent 
of  the  aggregate  auction-rate  securities  par  value  had  been  redeemed  or  sold  since  the  portfolio  was  acquired  in  2008,  for  a 
cumulative net gain of $52 million. 

Interest-Bearing Deposits with Banks and Other Short-Term Investments

 Interest-bearing deposits with banks primarily include deposits with the FRB and also include deposits with banks in 
developed countries or international banking facilities of foreign banks located in the United States. Other short-term investments 
include federal funds sold, trading securities and loans held-for-sale. Substantially all trading securities are deferred compensation 
plan assets. Loans held-for-sale typically represent residential mortgage loans originated with management's intention to sell and, 
from time to time, other loans that are transferred to held-for-sale. Federal funds sold offer supplemental earnings opportunities 
and serve correspondent banks. Interest-bearing deposits with banks and federal funds sold provide a range of maturities of less 
than one year and are mostly used to manage liquidity requirements of the Corporation. Interest-bearing deposits with banks 
increased $1.0 billion to $6.0 billion at December 31, 2016. Other short-term investments decreased $21 million to $92 million
at December 31, 2016. On an average basis, interest-bearing deposits decreased $1.1 billion to $5.1 billion in 2016, compared to 
$6.2 billion in 2015, primarily reflecting a $1.1 billion decrease in average deposits with the FRB. 

F-18

DEPOSITS AND BORROWED FUNDS

The Corporation's average deposits and borrowed funds balances are detailed in the following table.

(dollar amounts in millions)
Years Ended December 31
Noninterest-bearing deposits
Money market and interest-bearing checking deposits
Savings deposits
Customer certificates of deposit
Foreign office time deposits
Total deposits
Short-term borrowings
Medium- and long-term debt
Total borrowed funds

2016

2015

Change

Percent
Change

$

$
$

$

29,751
22,744
2,013
3,200
33
57,741
138
4,917
5,055

$

$
$

$

28,087
24,073
1,841
4,209
116
58,326
93
2,905
2,998

$

$
$

$

1,664
(1,329)
172
(1,009)
(83)
(585)
45
2,012
2,057

6 %
(6)
9
(24)
(72)
(1)%
48 %
69
69 %

Average deposits decreased $585 million, or 1 percent, to $57.7 billion in 2016, compared to $58.3 billion in 2015, 
reflecting a $1.7 billion, or 6 percent, increase in noninterest-bearing deposits and a $2.2 billion, or 7 percent, decrease in interest-
bearing deposits. The decrease in average deposits primarily reflected purposeful pricing discipline and strategic actions in light 
of new LCR rules, with the largest decreases in Municipalities ($1.1 billion) (a general Middle Market business), Corporate Banking 
($460 million) and the Financial Services Division ($359 million) (a general Middle Market business), partially offset by increases 
in the remaining general Middle Market businesses ($645 million) and Retail Banking ($682 million). By market, average deposits 
decreased in Texas ($714 million), California ($355 million), and Michigan ($66 million), partially offset by an increase in Other 
Markets ($602 million). At December 31, 2016, total deposits were $59.0 billion, a decrease of $868 million, or 1 percent, compared 
to $59.9 billion at December 31, 2015, reflecting a $701 million, or 2 percent, increase in noninterest-bearing deposits and a $1.6 
billion, or 5 percent, decrease in interest-bearing deposits. 

Short-term borrowings primarily include federal funds purchased, short-term Federal Home Loan Bank (FHLB) advances, 
and securities sold under agreements to repurchase. Average short-term borrowings increased $45 million, to $138 million in 2016, 
compared to $93 million in 2015, primarily reflecting the January 2016 issuance of $500 million of 3-month FHLB advances, 
partially offset by a decrease in securities sold under agreements to repurchase. Total short-term borrowings at December 31, 2016
were $25 million, an increase of $2 million compared to $23 million at December 31, 2015.

Average medium- and long-term debt increased $2.0 billion, or 69 percent, to $4.9 billion in 2016, compared to $2.9 
billion in 2015. The Corporation uses medium- and long-term debt to provide funding to support earning assets, liquidity and 
regulatory capital. Total medium- and long-term debt at December 31, 2016 increased $2.1 billion to $5.2 billion, compared to 
$3.1 billion at December 31, 2015. The increase resulted primarily from the addition of $2.8 billion of 10-year FHLB advances 
in the second quarter 2016. 

Further information on medium- and long-term debt is provided in Note 12 to the consolidated financial statements.

CAPITAL

Total  shareholders'  equity  increased  $236  million  to  $7.8  billion  at  December 31,  2016,  compared  to  $7.6  billion  at 

December 31, 2015. The following table presents a summary of changes in total shareholders' equity in 2016.

(in millions)
Balance at January 1, 2016
Net income
Cash dividends declared on common stock
Purchase of common stock
Other comprehensive income (loss):

Investment securities available-for-sale
Defined benefit and other postretirement plans
Total other comprehensive income (loss)

Issuance of common stock under employee stock plans
Share-based compensation
Balance at December 31, 2016

$

(42)
88

$

$

7,560
477
(154)
(310)

46
143
34
7,796

Further information about other comprehensive income (loss) is provided in the consolidated statements of comprehensive 

income and Note 14 to the consolidated financial statements.

F-19

 
During January 2017, 1.5 million shares were issued under share-based compensation plans as a result of employee stock 
option exercises and vesting of restricted shares. The discrete tax benefit recognized as a result of these issuances was approximately 
$14 million. Tax benefits that will be recognized for the remainder of the year will depend upon employee stock option activity 
and the market value of the Corporation’s stock on the option exercise and stock award vesting dates. Additionally during January 
2017, the Corporation repurchased approximately 600,000 common shares under its share repurchase program.

Diluted net income per share includes the net effect of the assumed exercise of outstanding stock options and warrants. 
The Corporation’s average stock price for January 2017 was $68 compared to $46 for full-year 2016, resulting in an increase of 
approximately 2 million diluted average common shares. The impact on diluted net income per share from exercisable stock 
options and warrants outstanding for the remainder of the year will depend upon the Corporation’s stock price and exercise activity.

The Federal Reserve completed its 2016 Comprehensive Capital Analysis and Review (CCAR) in June 2016 and did not 
object to the Corporation's 2016/2017 capital plan and the capital distributions contemplated in the plan for the period ending June 
30,  2017.  The  plan  includes  equity  repurchases  of  up  to  $440  million  for  the  four-quarter  period  ending  June  30,  2017. At 
December 31, 2016, up to $244 million remained available for equity repurchases under the plan. Share repurchases totaled $303 
million (6.6 million shares) in 2016. The timing and ultimate amount of future equity repurchases will be subject to various factors, 
including  the  Corporation's  overall  capital  position,  financial  performance  and  market  conditions,  including  interest  rates. 
Restructuring charges associated with the GEAR Up initiative are not expected to impact the pace of repurchases. The 2017 capital 
plan will be submitted to the Federal Reserve for review in April 2017 and a response is expected in June 2017.

 In July 2016, the Board of Directors of the Corporation (the Board) authorized the repurchase of up to an additional 10.0 
million shares of Comerica Incorporated outstanding common stock, in addition to the 5.7 million shares remaining at June 30, 
2016 under the Board's prior authorizations for the equity repurchase program initially approved in November 2010. Including 
the July 2016 authorization, a total of 50.3 million shares and 14.1 million warrants (12.1 million share-equivalents) have been 
authorized for repurchase under the equity repurchase program since its inception in 2010. There is no expiration date for the 
Corporation's equity repurchase program.

In April 2016, the Board approved a 1-cent increase in the quarterly common dividend, to $0.22 per share, and in July 
2016, the Board further increased the quarterly dividend to $0.23 per share. The Corporation declared common dividends in 2016
totaling $154 million, or $0.89 per share, on net income of $477 million, compared to common dividends totaling $0.83 per share 
in 2015. The dividend payout ratio, calculated on a per share basis, was 32 percent in 2016, compared to 28 percent in 2015. 
Including share repurchases under the equity repurchase program, the total payout to shareholders was 96 percent in 2016, compared 
to 75 percent in 2015.

F-20

The following table summarizes the Corporation’s equity repurchase activity for the year ended December 31, 2016.

(shares in thousands)
Total first quarter 2016
Total second quarter 2016
Total third quarter 2016

October 2016
November 2016
December 2016

Total fourth quarter 2016

Total 2016

Total Number of Shares and 
Warrants Purchased as 
Part of Publicly Announced 
Repurchase Plans or 
Programs (a)

Remaining
Repurchase
Authorization (b)

1,183
1,483
2,123
839
644
302
1,785
6,574

15,721
14,238
22,114 (d)
19,575
17,834
15,694
15,694
15,694

Total Number
of Shares
Purchased (c)
1,393
1,488
2,134
842
645
307
1,794
6,809

$

$

Average Price
Paid Per 
Share

35.26
43.78
45.66
49.88
57.10
67.27
55.45
45.70

(a)  The Corporation made no repurchases of warrants under the repurchase program during the year ended December 31, 2016. Upon exercise 
of a warrant, the number of shares with a value equal to the aggregate exercise price is withheld from an exercising warrant holder as 
payment (known as a "net exercise provision"). During the year ended December 31, 2016, the Corporation withheld the equivalent of 
approximately 2,319,000 shares to cover an aggregate of $68.2 million in exercise price and issued approximately 2,317,000 shares to the 
exercising warrant holders. Shares withheld in connection with the net exercise provision are not included in the total number of shares or 
warrants purchased in the above table.

(b)  Maximum number of shares and warrants that may yet be purchased under the publicly announced plans or programs.
(c)  Includes approximately 235,000 shares (including 9,000 shares for the quarter ended December 31, 2016) purchased pursuant to deferred 
compensation plans and shares purchased from employees to pay for taxes related to restricted stock vesting under the terms of an employee 
share-based compensation plan and 26 shares purchased by affiliated purchasers through employee benefits plan transactions during the 
year ended December 31, 2016. These transactions are not considered part of the Corporation's repurchase program.

(d)  Includes July 26, 2016 equity repurchase authorization for up to an additional 10 million shares. 

The Corporation periodically conducts stress tests to evaluate potential impacts to the Corporation's forecasted financial 
condition under various economic scenarios and business conditions. These stress tests are a normal part of the Corporation's 
overall risk management and capital planning process and are part of the forecasting process used by the Corporation to conduct 
the enterprise-wide stress test that was part of CCAR. For additional information about risk management processes, refer to the 
"Risk Management" section of this financial review.

The U.S. adoption of the Basel III regulatory capital framework (Basel III) became effective for the Corporation on 
January 1, 2015. Basel III includes a more stringent definition of capital and introduces a new common equity Tier 1 (CET1) 
capital  requirement;  sets  forth  two  comprehensive  methodologies  for  calculating risk-weighted  assets  (RWA),  a  standardized 
approach  and  an  advanced  approach;  introduces  two  new  capital  buffers,  a  conservation  buffer  and  a  countercyclical  buffer 
(applicable to advanced approach entities); establishes a new supplemental leverage ratio (applicable to advanced approach entities); 
and sets out minimum capital ratios and overall capital adequacy standards. Certain deductions and adjustments to regulatory 
capital phase in and will be fully implemented on January 1, 2018. The capital conservation buffer is being phased in beginning 
January 1, 2016 and will be fully implemented on January 1, 2019. 

Under Basel III, CET1 capital predominantly includes common shareholders' equity, less certain deductions for goodwill, 
intangible  assets  and  deferred  tax  assets  that  arise  from  net  operating  losses  and  tax  credit  carry-forwards. Additionally,  the 
Corporation has elected to permanently exclude capital in accumulated other comprehensive income (AOCI) related to debt and 
equity securities classified as available-for-sale as well as for defined benefit postretirement plans from CET1, an option available 
to standardized approach entities under Basel III. Tier 1 capital incrementally includes noncumulative perpetual preferred stock.  
Tier 2 capital includes Tier 1 capital as well as subordinated debt qualifying as Tier 2 and qualifying allowance for credit losses.  
Certain deductions and adjustments to CET1 capital, Tier 1 capital and Tier 2 capital are subject to phase-in through December 
31, 2017.

The Corporation computes RWA using the standardized approach. Under the standardized approach, RWA is generally 
based on supervisory risk-weightings which vary by counterparty type and asset class. Under the Basel III standardized approach, 
capital is required for credit risk RWA, to cover the risk of unexpected losses due to failure of a customer or counterparty to meet 
its financial obligations in accordance with contractual terms; and if trading assets and liabilities exceed certain thresholds, capital 
is also required for market risk RWA, to cover the risk of losses due to adverse market movements or from position-specific factors.

F-21

The following table presents the minimum ratios required to be considered "adequately capitalized" as of December 31, 

2016 and December 31, 2015.

Common equity tier 1 capital to risk-weighted assets
Tier 1 capital to risk-weighed assets
Total capital to risk-weighted assets
Capital conservation buffer
Tier 1 capital to adjusted average assets (leverage ratio)
(a)  In addition to the minimum risk-based capital requirements, the Corporation is required to maintain a minimum capital conservation buffer 
in the form of common equity, in order to avoid restrictions on capital distributions and discretionary bonuses. The required amount of the 
capital conservation buffer, is being phased in beginning at 0.625% on January 1, 2016 and ultimately increasing to 2.5% on January 1, 
2019.

December 31, 2016
4.50% (a)
6.00
(a)
8.00
(a)
(a)
0.625
4.00

December 31, 2015
4.50%
6.00
8.00
—
4.00

The Corporation's capital ratios exceeded minimum regulatory requirements as follows:

December 31, 2016

December 31, 2015

(dollar amounts in millions)
Common equity tier 1 and tier 1 risk-based
Total risk-based
Leverage
Common equity
Tangible common equity (a)
Risk-weighted assets
(a)  See Supplemental Financial Data section for reconcilements of non-GAAP financial measures.

Capital/Assets
7,540
$
9,018
7,540
7,796
7,151
67,966

Ratio

11.09% $
13.27
10.18
10.68
9.89

Capital/Assets
7,350
8,852
7,350
7,560
6,911
69,731

Ratio

10.54%
12.69
10.22
10.52
9.70

At December 31, 2016, the Corporation and its U.S. banking subsidiaries exceeded the capital ratios required for an 
institution  to  be  considered  “well  capitalized”  by  the  standards  developed  under  the  Federal  Deposit  Insurance  Corporation 
Improvement Act of 1991. Refer to Note 20 to the consolidated financial statements for further discussion of regulatory capital 
requirements and capital ratio calculations.

F-22

RISK MANAGEMENT

As a result of conducting business in the normal course, the Corporation assumes various types of risk. The Corporation's 
enterprise risk framework provides a process for identifying, measuring, controlling and managing these risks. This framework 
incorporates a risk assessment process, a collection of risk committees that manage the Corporation's major risk elements, and a 
risk appetite statement that outlines the levels and types of risks the Corporation accepts. The Corporation continuously enhances 
its enterprise risk framework with additional processes, tools and systems designed to not only provide management with deeper 
insight into the Corporation's various existing and emerging risks in accordance with its appetite for risk, but also to improve the 
Corporation's ability to control those risks and ensure that appropriate consideration is received for the risks taken.

The Corporation’s front line employees, the first line of defense, are responsible for the day to day management of risks 
including the identification, assessment, measurement and control of risks encountered as a part of the normal course of business.  
Risks are further monitored, measured and controlled by the second line of defense, specialized risk managers for each of the 
major risk categories who aid in the identification, measurement, and control of organizational risks. The majority of these risk 
managers report into the Office of Enterprise Risk. The Office of Enterprise Risk, led by the Chief Risk Officer, is responsible for 
designing  and  managing  the  Corporation’s  enterprise  risk  framework  and  ensures  effective  risk  management  oversight.  Risk 
management committees serve as a point of review and escalation for those risks which may have risk interdependencies or where 
risk levels may be nearing the limits outlined in the Corporation’s risk appetite statement. These committees comprise senior and 
executive management that represent views from both the lines of business and risk management. Internal Audit, the third line of 
defense, monitors and assesses the overall effectiveness of the risk management framework on an ongoing basis and provides an 
independent assessment of the Corporation’s ability to manage and control risk to management and the Audit Committee of the 
Board. 

The  Enterprise-Wide  Risk  Management  Committee,  established  by  the  Enterprise  Risk  Committee  of  the  Board,  is 
responsible for governance over the risk management framework, providing oversight in managing the Corporation's aggregate 
risk position and reporting on the comprehensive portfolio of risks as well as the potential impact these risks can have on the 
Corporation's risk profile and resulting capital level. The Enterprise-Wide Risk Management Committee is principally composed 
of senior officers and executives representing the different risk areas and business units who are appointed by the Chairman and 
Chief Executive Officer of the Corporation.

The Board's Enterprise Risk Committee meets quarterly and is chartered to assist the Board in promoting the best interests 
of the Corporation by overseeing policies, procedures and risk practices relating to enterprise-wide risk and ensuring compliance 
with bank regulatory obligations. Members of the Enterprise Risk Committee are selected such that the committee comprises 
individuals whose experiences and qualifications can lead to broad and informed views on risk matters facing the Corporation 
and the financial services industry. These include, but are not limited to, existing and emerging risk matters related to credit, 
market, liquidity, operational, compliance and strategic conditions. A comprehensive risk report is submitted to the Enterprise 
Risk Committee each quarter providing management's view of the Corporation's aggregate risk position.

Further discussion and analyses of each major risk area are included in the following sub-sections of the Risk Management 

section in this financial review.

CREDIT RISK

Credit risk represents the risk of loss due to failure of a customer or counterparty to meet its financial obligations in 
accordance with contractual terms. The governance structure is administered through the Strategic Credit Committee. The Strategic 
Credit Committee is chaired by the Chief Credit Officer and approves recommendations to address credit risk matters through 
credit policy, credit risk management practices, and required credit risk actions. The Strategic Credit Committee also ensures a 
comprehensive reporting of credit risk levels and trends, including exception levels, along with identification and mitigation of 
emerging risks. In order to facilitate the corporate credit risk management process, various other corporate functions provide the 
resources  for  the  Strategic  Credit  Committee  to  carry  out  its  responsibilities.  The  Corporation  manages  credit  risk  through 
underwriting  and  periodically  reviewing  and  approving  its  credit  exposures  using  approved  credit  policies  and  guidelines. 
Additionally, the Corporation manages credit risk through loan portfolio diversification, limiting exposure to any single industry, 
customer or guarantor, and selling participations and/or syndicating credit exposures above those levels it deems prudent to third 
parties.

Credit Administration manages credit policy and provides the resources to manage the line of business transactional credit 
risk, assuring that all exposure is risk rated according to the requirements of the credit risk rating policy and providing business 
segment reporting support as necessary. The Corporation's Asset Quality Review function, a division of Internal Audit, audits the 
accuracy of internal risk ratings that are assigned by the lending and credit groups. The Special Assets Group is responsible for 
managing the recovery process on distressed or defaulted loans and loan sales.

F-23

Portfolio Risk Analytics, within the Office of Enterprise Risk, provides comprehensive reporting on portfolio credit risk 
levels and trends, continuous assessment and verification of risk rating models, quarterly calculation of the allowance for loan 
losses and the allowance for credit losses on lending-related commitments, and calculation of economic credit risk capital.

ANALYSIS OF THE ALLOWANCE FOR LOAN LOSSES

(dollar amounts in millions)
Years Ended December 31
Balance at beginning of year
Loan charge-offs:
Commercial
Real estate construction
Commercial mortgage
Lease financing
International
Residential mortgage
Consumer

Total loan charge-offs

Recoveries:

Commercial
Real estate construction
Commercial mortgage
Lease financing
International
Residential mortgage
Consumer

Total recoveries
Net loan charge-offs
Provision for loan losses
Foreign currency translation adjustment
Balance at end of year
Net loan charge-offs during the year as a

percentage of average loans outstanding during
the year

$

Allowance for Credit Losses

2016

2015

2014

2013

2012

$

634

$

594

$

598

$

629

$

181
—
3
—
23
—
7
214

43
—
20
—
—
1
4
68
146
241
1
730

$

139
—
3
1
14
1
10
168

33
1
21
—
—
2
11
68
100
142
(2)
634

$

59
—
22
—
6
2
13
102

34
4
28
2
—
4
5
77
25
22
(1)
594

$

91
3
36
—
—
4
19
153

42
7
20
1
—
4
6
80
73
42
—
598

$

726

112
8
89
—
3
13
20
245

39
6
18
—
2
2
8
75
170
73
—
629

0.30%

0.21%

0.05%

0.16%

0.39%

The allowance for credit losses includes both the allowance for loan losses and the allowance for credit losses on lending-
related commitments. The allowance for loan losses represents management's assessment of probable, estimable losses inherent 
in the Corporation's loan portfolio. The allowance for credit losses on lending-related commitments, included in "accrued expenses 
and other liabilities" on the consolidated balance sheets, provides for probable losses inherent in lending-related commitments, 
including unused commitments to extend credit and standby letters of credit. Refer to Note 1 to the consolidated financial statements 
for a discussion of the methodology used in the determination of the allowance for credit losses.

After a weak first half of 2016, U.S. economic growth improved in the second half of the year. Real Gross Domestic 
Product (GDP) growth stepped up to 3.5 percent in third quarter 2016. The Federal Reserve responded to the improving U.S. 
economic data in the third quarter 2016 by raising the federal funds rate range by 25 basis points in December 2016. There is 
significant economic and financial market uncertainty associated with the expected policies of the Trump Administration. Overall, 
the expectations are the policies will be positive for the economy and support stronger growth in 2017. Labor market indicators 
remain  positive  at  the  start  of  2017.  Pricing  conditions  for  commodity-based  industries  continue  to  be  stressed  due  to  the 
strengthening U.S. dollar; however, petroleum-related prices are increasing due to more coordination from OPEC countries to 
constrain the supply of oil. The gain in oil prices through the second half of 2016 has helped to stabilize parts of the energy sector. 
Measurements of both consumer and business confidence have improved. U.S. auto sales were strong at year-end reaching an 
18.4 million unit pace in December 2016. Auto sales are expected to ease from that pace but remain strong in 2017. 

An analysis of the coverage of the allowance for loan losses is provided in the following table.

Years Ended December 31
Allowance for loan losses as a percentage of total loans at end of year
Allowance for loan losses as a percentage of total nonperforming loans at end of year
Allowance for loan losses as a multiple of total net loan charge-offs for the year

2016

2015

2014

1.49%
124
5.0x

1.29%
167
6.3x

1.22%
205
23.5x

F-24

The allowance for loan losses was $730 million at December 31, 2016, compared to $634 million at December 31, 2015, 
an increase of $96 million, or 15 percent. The increase in the allowance for loan losses primarily reflected an increase in reserves 
allocated for Energy and energy-related loans, partially offset by improved credit quality in the remainder of the portfolio. The 
increase in reserves for Energy and energy-related exposure reflected additional negative migration into criticized loans, primarily 
in the first quarter 2016, due to the deteriorating financial condition and increased leverage of these borrowers, as well as an 
increased loss estimate in the event of default. 

ALLOCATION OF THE ALLOWANCE FOR LOAN LOSSES

(dollar amounts in millions) Allocated
Allowance
December 31

Allowance
Ratio (a) % (b)

Allocated
Allowance % (b)

Allocated
Allowance % (b)

Allocated
Allowance % (b)

Allocated
Allowance % (b)

2016

2015

2014

2013

2012

Business loans

Commercial

Real estate construction

Commercial mortgage

Lease financing

International

Total business loans

Retail loans

Residential mortgage
Consumer

Total retail loans

$

547

21

93

5

16

682

11
37

48

Total loans

$

730

1.77% 63% $
0.72

6

1.05

0.81

1.30

1.53

0.54
1.49

18

1

3

91

4
5

1.08
1.49% 100% $

9

448

65% $

12

93

3

23

579

14
41

55

4

18

1

3

91

4
5

9

379

20

120

2

13

534

14
46

60

65% $

4

18

1

3

91

4
5

9

340

16

159

4

12

531

17
50

67

63% $

4

19

2

3

91

4
5

9

293

16

227

4

12

552

20
57

77

63%

3

21

2

3

92

3
5

8

634

100% $

594

100% $

598

100% $

629

100%

(a)  Allocated allowance as a percentage of related loans outstanding.
(b)  Loans outstanding as a percentage of total loans.

The  allowance  for  credit  losses  on  lending-related  commitments  includes  specific  allowances,  based  on  individual 
evaluations of certain letters of credit in a manner consistent with business loans, and allowances based on the pool of the remaining 
letters of credit and all unused commitments to extend credit within each internal risk rating.

The allowance for credit losses on lending-related commitments was $41 million at December 31, 2016 compared to $45 
million at December 31, 2015. The $4 million decrease in the allowance for credit losses on lending-related commitments primarily 
reflected  the  impact  of  decreases  in  unfunded  commitments  and  letters  of  credit  exposure,  partially  offset  by  credit  quality 
deterioration in Energy and energy-related unfunded commitments and issued letters of credit. An analysis of changes in the 
allowance for credit losses on lending-related commitments is presented below.

(dollar amounts in millions)
Years Ended December 31
Balance at beginning of year
Charge-offs on lending-related commitments (a)
Provision for credit losses on lending-related commitments
Balance at end of year
(a)  Charge-offs result from the sale of unfunded lending-related commitments.

2016

$

$

45
(11)
7
41

2015

2014

2013

2012

$

$

41
(1)
5
45

$

$

36
—
5
41

$

$

32
—
4
36

$

$

26
—
6
32

For additional information regarding the allowance for credit losses, refer to the "Critical Accounting Policies" section 
of this financial review and Notes 1 and 4 to the consolidated financial statements. For additional information regarding Energy 
and energy-related exposures, refer to "Energy Lending" subheading later in this section. 

Nonperforming Assets

Nonperforming assets include loans on nonaccrual status, troubled debt restructured loans (TDRs) which have been 
renegotiated to less than the original contractual rates (reduced-rate loans) and foreclosed property. TDRs include performing and 
nonperforming loans. Nonperforming TDRs are either on nonaccrual or reduced-rate status.

F-25

SUMMARY OF NONPERFORMING ASSETS AND PAST DUE LOANS

(dollar amounts in millions)
December 31
Nonaccrual loans:
Business loans:
Commercial
Real estate construction
Commercial mortgage
Lease financing
International

Total nonaccrual business loans
Retail loans:

Residential mortgage
Consumer:

Home equity
Other consumer
Total consumer
Total nonaccrual retail loans

Total nonaccrual loans
Reduced-rate loans
Total nonperforming loans
Foreclosed property
Total nonperforming assets
Gross interest income that would have been recorded 
had the nonaccrual and reduced-rate loans performed 
in accordance with original terms

Interest income recognized
Nonperforming loans as a percentage of total loans
Nonperforming assets as a percentage of total loans

and foreclosed property

Loans past due 90 days or more and still accruing
Loans past due 90 days or more and still accruing as

a percentage of total loans

2016

2015

2014

2013

2012

$

$

$

$

445
—
46
6
14
511

39

28
4
32
71
582
8
590
17
607

38
6
1.20%

1.24
19

$

$

$

$

238
1
60
6
8
313

27

27
—
27
54
367
12
379
12
391

27
5
0.77%

0.80
17

$

$

$

$

109
2
95
—
—
206

36

30
1
31
67
273
17
290
10
300

25
6
0.60%

0.62
5

$

$

$

$

81
21
156
—
4
262

53

31
4
35
88
350
24
374
9
383

34
5
0.82%

0.84
16

$

$

$

$

103
33
275
3
—
414

70

31
4
35
105
519
22
541
54
595

62
5
1.17%

1.29
23

0.04%

0.03%

0.01%

0.03%

0.05%

Nonperforming assets increased $216 million to $607 million at December 31, 2016, from $391 million at December 31, 
2015. The increase in nonperforming assets primarily reflected increases of $207 million in nonaccrual commercial loans, largely 
the result of a $212 million increase in nonaccrual Energy and energy-related loans. Nonperforming assets were 1.24 percent of 
total loans and foreclosed property at December 31, 2016, compared to 0.80 percent at December 31, 2015.

The following table presents a summary of TDRs at December 31, 2016 and 2015.

(in millions)
December 31
Nonperforming TDRs:
Nonaccrual TDRs
Reduced-rate TDRs

2016

2015

Total nonperforming TDRs

100
12
112
128
Performing TDRs (a)
240
Total TDRs
(a)  TDRs that do not include a reduction in the original contractual interest rate which are performing in accordance with their modified terms.

225
8
233
94
327

$

$

$

$

At December 31, 2016, nonaccrual TDRs and performing TDRs included $141 million and $60 million of Energy and 
energy-related loans, respectively, an increase of $80 million and a decrease of $20 million, respectively, compared to December 31, 
2015.

F-26

The following table presents a summary of changes in nonaccrual loans.

(in millions)
Years Ended December 31
Balance at beginning of period
Loans transferred to nonaccrual (a)
Nonaccrual business loan gross charge-offs (b)
Loans transferred to accrual status (a)
Nonaccrual business loans sold (c)
Payments/other (d)
Balance at end of period
(a) Based on an analysis of nonaccrual loans with book balances greater than $2 million.
(b) Analysis of gross loan charge-offs:

Nonaccrual business loans
Performing business loans
Retail loans

Total gross loan charge-offs

(c) Analysis of loans sold:

2016

2015

$

$

$

$

367
718
(207)
—
(73)
(223)
582

207
—
7
214

$

$

$

$

273
358
(132)
(4)
(3)
(125)
367

132
25
11
168

Nonaccrual business loans
Performing criticized loans
Total criticized loans sold

3
10
13
(d) Includes net changes related to nonaccrual loans with balances less than $2 million, payments on nonaccrual loans with book 
balances greater than $2 million, transfers of nonaccrual loans to foreclosed property and retail loan gross charge-offs. 
Excludes business loan gross charge-offs and nonaccrual business loans sold.

73
—
73

$

$

$

$

There were 56 borrowers with balances greater than $2 million, totaling $718 million, transferred to nonaccrual status 
in 2016, an increase of $360 million when compared to $358 million in 2015. Of the transfers to nonaccrual greater than $2 million 
in 2016, $543 million were Energy and energy-related, compared to $226 million in 2015. 

The following table presents the composition of nonaccrual loans by balance and the related number of borrowers at 

December 31, 2016 and 2015.

(dollar amounts in millions)
Under $2 million
$2 million - $5 million
$5 million - $10 million
$10 million - $25 million
Greater than $25 million
Total

2016

2015

Number of
Borrowers

Balance

Number of
Borrowers

Balance

1,152
18
9
14
4
1,197

$

$

95
57
60
234
136
582

1,300
12
8
4
3
1,327

$

$

112
34
57
58
106
367

F-27

The following table presents a summary of nonaccrual loans at December 31, 2016 and loans transferred to nonaccrual 
and net loan charge-offs for the year ended December 31, 2016, based on North American Industry Classification System (NAICS) 
categories.

December 31, 2016

Year Ended December 31, 2016

Nonaccrual Loans

Loans Transferred to
Nonaccrual (a)

Net Loan Charge-Offs
(Recoveries)

(dollar amounts in millions)
Industry Category
Mining, Quarrying and Oil & Gas Extraction (b) $
Manufacturing (b)
Residential Mortgage
Services (b)
Real Estate and Home Builders
Health Care and Social Assistance
Wholesale Trade
Holding and Other Investment Companies
Transportation and Warehousing (b)
Retail Trade
Information and Communication
Contractors
Other (c)
Total
(a)  Based on an analysis of nonaccrual loans with book balances greater than $2 million.
(b)  Included nonaccrual Energy and energy-related loans of approximately $335 million in Mining, Quarrying and Oil & Gas Extraction, $16 

58% $
11
8
5
3
3
2
2
1
1
—
—
6

66% $
12
2
4
—
—
6
—
3
1
1
3
2

62%
19
(1)
6
(10)
—
4
(1)
8
4
1
8
—
100%

91
28
(1)
9
(15)
—
6
(1)
11
6
1
11
—
146

476
87
16
28
—
—
39
—
24
8
7
19
14
718

335
64
39
31
20
18
13
9
7
4
3
1
38
582

100% $

100% $

$

million in Services, $15 million in Manufacturing and $7 million in Transportation and Warehousing at December 31, 2016.

(c)  Consumer, excluding residential mortgage and certain personal purpose nonaccrual loans and net charge-offs, is included in the “Other” 

category.

Loans past due 90 days or more and still accruing interest generally represent loans that are well collateralized and in the 
process of collection. Loans past due 90 days or more increased $2 million to $19 million at December 31, 2016, compared to 
$17 million at December 31, 2015. Loans past due 30-89 days totaled $129 million at both December 31, 2016 and 2015. An aging 
analysis of loans included in Note 4 to the consolidated financial statements provides further information about the balances 
comprising past due loans.

The following table presents a summary of total criticized loans. The Corporation's criticized list is consistent with the 
Special Mention, Substandard and Doubtful categories defined by regulatory authorities. Criticized loans with balances of $2 
million or more on nonaccrual status or whose terms have been modified in a TDR are individually subjected to quarterly credit 
quality reviews, and the Corporation may establish specific allowances for such loans. A table of loans by credit quality indicator 
included  in  Note  4  to  the  consolidated  financial  statements  provides  further  information  about  the  balances  comprising  total 
criticized loans.

(dollar amounts in millions)
December 31
Total criticized loans
As a percentage of total loans

2016

2015

$

2,856

$

5.8%

3,193

6.5%

The $337 million decrease in criticized loans from December 31, 2015 to December 31, 2016 included a $105 million
decrease in criticized Energy and energy-related loans. For further information about criticized Energy and energy-related loans, 
refer to the "Energy Lending" subheading later in this section.

The following table presents a summary of changes in foreclosed property.

(in millions)
Years Ended December 31
Balance at beginning of period
Acquired in foreclosure
Write-downs
Foreclosed property sold (a)
Balance at end of period
(a)   Net gain on foreclosed property sold

2016

2015

$

$
$

12
21
—
(16)
17
4

$

$
$

10
12
(1)
(9)
12
3

F-28

For further information regarding the Corporation's nonperforming assets policies and impaired loans, refer to Note 1

and Note 4 to the consolidated financial statements.

Concentration of Credit Risk

Concentrations of credit risk may exist when a number of borrowers are engaged in similar activities, or activities in the 
same geographic region, and have similar economic characteristics that would cause them to be similarly impacted by changes in 
economic or other conditions. The Corporation has a concentration of credit risk with the automotive industry. All other industry 
concentrations, as defined by management, individually represented less than 10 percent of total loans at December 31, 2016. 

The following table presents a summary of loans outstanding to companies related to the automotive industry.

(in millions)
December 31
Production:
Domestic
Foreign

Total production

Dealer:

Floor plan
Other

Total dealer
Total automotive

2016

2015

Loans
Outstanding

Percent of
Total Loans

Loans
Outstanding

Percent of
Total Loans

$

$

968
358
1,326

4,269
2,854
7,123
8,449

$

2.7%

14.5%
17.2% $

892
374
1,266

3,939
2,634
6,573
7,839

2.6%

13.4%
16.0%

Substantially all dealer loans are in the National Dealer Services business line. Loans in the National Dealer Services 
business  line  primarily  include  floor  plan  financing  and  other  loans  to  automotive  dealerships.  Floor  plan  loans,  included  in 
“commercial loans” in the consolidated balance sheets, totaled $4.3 billion at December 31, 2016, an increase of $330 million
compared to $3.9 billion at December 31, 2015. At December 31, 2016 other loans in the National Dealer Services business line 
totaled $2.9 billion, including $1.6 billion of owner-occupied commercial real estate mortgage loans, compared to $2.6 billion, 
including $1.7 billion of owner-occupied commercial real estate mortgage loans, at December 31, 2015. Automotive lending also 
includes  loans  to  borrowers  involved  with  automotive  production,  primarily Tier  1  and Tier  2  suppliers.  Loans  to  borrowers 
involved with automotive production totaled approximately $1.3 billion at both December 31, 2016 and 2015.

December 31, 2016, dealer loans, as shown in the table above, totaled $7.1 billion, of which approximately $4.3 billion, 
or 62 percent, were to foreign franchises, and $2.0 billion, or 27 percent, were to domestic franchises. Other dealer loans, totaling 
$672 million, or 10 percent, at December 31, 2016, include obligations where a primary franchise was indeterminable, such as 
loans to large public dealership consolidators and rental car, leasing, heavy truck and recreation vehicle companies.

There were $1 million of nonaccrual loans to automotive borrowers at December 31, 2016 and none at December 31, 

2015. There were no automotive net loan charge-offs in 2016 and 2015.

For further information regarding significant group concentrations of credit risk, refer to Note 5 to the consolidated 

financial statements.

Commercial Real Estate Lending

The following table summarizes the Corporation's commercial real estate loan portfolio by loan category.

(in millions)
December 31
Real estate construction loans:

Commercial Real Estate business line (a)
Other business lines (b)

Total real estate construction loans
Commercial mortgage loans:

Commercial Real Estate business line (a)
Other business lines (b)

Total commercial mortgage loans
(a)  Primarily loans to real estate developers.
(b)  Primarily loans secured by owner-occupied real estate.

2016

2015

$

$

$

$

2,485
384
2,869

2,018
6,913
8,931

$

$

$

$

1,681
320
2,001

2,104
6,873
8,977

The Corporation limits risk inherent in its commercial real estate lending activities by limiting exposure to those borrowers 
directly involved in the commercial real estate markets, diversifying credit risk by geography and project type, and maintaining 

F-29

conservative policies on loan-to-value ratios for such loans. Commercial real estate loans, consisting of real estate construction 
and commercial mortgage loans, totaled $11.8 billion at December 31, 2016, of which $4.5 billion, or 38 percent, were to borrowers 
in the Commercial Real Estate business line, which includes loans to real estate developers, an increase of $822 million compared 
to December 31, 2015. The growth in Commercial Real Estate primarily reflected construction draws and term financing, mainly 
with existing customers who are proven developers, on projects with favorable risk characteristics (predominantly multifamily 
projects located in California and Texas). The remaining $7.3 billion, or 62 percent, of commercial real estate loans is to borrowers 
in other business lines and consisted primarily of owner-occupied commercial mortgages which bear credit characteristics similar 
to non-commercial real estate business loans. In the Texas market, commercial real estate loans totaled $3.1 billion at December 31, 
2016, of which $1.7 billion were to borrowers in the Commercial Real Estate business line. Substantially all of the remaining $1.4 
billion were owner-occupied commercial mortgages. Loans in the Commercial Real Estate business line secured by properties 
located in Texas totaled $1.4 billion at December 31, 2016, primarily including $922 million for multifamily projects and $228 
million for retail projects. No loans in the Commercial Real Estate business line that were secured by properties located in Texas 
were on nonaccrual status at December 31, 2016. 

The  real  estate  construction  loan  portfolio  primarily  contains  loans  made  to  long-time  customers  with  satisfactory 
completion experience. Credit quality in the real estate construction loan portfolio was strong, with criticized loans of $3 million
and $1 million at December 31, 2016 and 2015, respectively, and no real estate construction loan charge-offs in 2016 and net 
recoveries of $1 million in 2015.

Loans in the commercial mortgage portfolio generally mature within three to five years. Of the $2.0 billion of commercial 
mortgage loans in the Commercial Real Estate business line, $9 million were on nonaccrual status at December 31, 2016, compared 
to $2.1 billion with $16 million on nonaccrual status at December 31, 2015. Commercial mortgage loan net recoveries in the 
Commercial Real Estate business line were $10 million and $5 million in 2016 and 2015, respectively. In other business lines, 
$37 million and $44 million of commercial mortgage loans were on nonaccrual status at December 31, 2016 and 2015, respectively. 
Net recoveries were $7 million and $13 million in 2016 and 2015, respectively.

Residential Real Estate Lending

The following table summarizes the Corporation's residential mortgage and home equity loan portfolios by geographic 

market.

(dollar amounts in millions)

2016

2015

December 31
Geographic market:

Michigan
California
Texas
Other Markets

Total

Residential
Mortgage 
Loans

% of
Total

Home
Equity 
Loans

% of
Total

Residential
Mortgage 
Loans

% of
Total

Home
Equity 
Loans

% of
Total

$

$

386
948
337
271
1,942

20% $
49
17
14
100% $

748
687
305
60
1,800

42% $
38
17
3

100% $

387
874
325
284
1,870

21% $
47
17
15
100% $

785
611
269
55
1,720

46%
35
16
3
100%

Residential real estate loans, which consist of traditional residential mortgages and home equity loans and lines of credit, 
totaled $3.7 billion at December 31, 2016. Residential mortgages totaled $1.9 billion at December 31, 2016, and were primarily 
larger, variable-rate mortgages originated and retained for certain private banking relationship customers. Of the $1.9 billion of 
residential mortgage loans outstanding, $39 million were on nonaccrual status at December 31, 2016. The home equity portfolio 
totaled $1.8 billion at December 31, 2016, of which $1.6 billion was outstanding under primarily variable-rate, interest-only home 
equity lines of credit, $130 million were in amortizing status and $40 million were closed-end home equity loans. Of the $1.8 
billion of home equity loans outstanding, $28 million were on nonaccrual status at December 31, 2016. A majority of the home 
equity portfolio was secured by junior liens at December 31, 2016. The residential real estate portfolio is principally located within 
the Corporation's primary geographic markets. Substantially all residential real estate loans past due 90 days or more are placed 
on nonaccrual status, and substantially all junior lien home equity loans that are current or less than 90 days past due are placed 
on nonaccrual status if full collection of the senior position is in doubt. At no later than 180 days past due, such loans are charged 
off to current appraised values less costs to sell.

Energy Lending

The Corporation has a portfolio of Energy and energy-related loans that are included primarily in "commercial loans" in 
the consolidated balance sheets. The Corporation has over 30 years of experience in energy lending, with a focus on larger middle 
market companies in the oil and gas business. Customers in the Corporation's Energy business line (approximately 200 borrowers 
at December 31, 2016) are engaged in three segments of the oil and gas business: exploration and production (E&P) (70 percent), 
midstream (17 percent) and energy services (13 percent). E&P generally includes such activities as searching for potential oil and 
gas fields, drilling exploratory wells and operating active wells. Commitments to E&P borrowers are generally subject to semi-
F-30

annual borrowing base re-determinations based on a variety of factors including updated prices (reflecting market and competitive 
conditions), energy reserve levels and the impact of hedging. The midstream sector is generally involved in the transportation, 
storage and marketing of crude and/or refined oil and gas products. The Corporation's energy services customers provide products 
and services primarily to the E&P segment. About 95 percent of the loans in the Energy business line are Shared National Credits 
(SNC),  which  are  facilities  greater  than  $20  million  shared  by  three  or  more  federally  supervised  institutions,  reflecting  the 
Corporation's focus on larger middle market companies that have financing needs that generally exceed internal individual borrower 
credit risk limits. The Corporation seeks to develop full relationships with SNC borrowers. 

In addition to oil and gas loans in the Energy business line, the Corporation is monitoring a portfolio of loans in other 
lines  of  business  to  companies  that  have  a  sizable  portion  of  their  revenue  related  to  oil  and  gas  or  could  be  otherwise 
disproportionately negatively impacted by prolonged lower oil and gas prices ("energy-related'), primarily in general Middle 
Market, Corporate Banking, Small Business, and Technology and Life Sciences. These companies include downstream businesses 
such as refineries and petrochemical companies, companies that sell products to E&P, midstream and energy services companies, 
companies involved in developing new technologies for the oil and gas industry, and other similar businesses.

The following table summarizes information about the Corporation's portfolio of Energy and energy-related loans.

(dollar amounts in millions)

2016

2015

Outstandings

December 31
Exploration and production (E&P)
Midstream
Services
Total Energy business line
Energy-related
Total energy and energy-related
As a percentage of total energy and energy-related loans

$ 1,587
374
289
2,250
397
$ 2,647

70% $
17
13
100%

$

Nonaccrual Criticized

Outstandings

Nonaccrual Criticized

294
7
27
328
45
373
14%

$

910
45
200
1,155
171
$ 1,326

50%

$ 2,111
479
480
3,070
624
$ 3,694

69% $
15
16
100%

$

108
—
24
132
29
161

$

967
42
235
1,244
187
$ 1,431

4%

38%

Loans in the Energy business line were $2.3 billion, or less than 5 percent of total loans, at December 31, 2016, compared 
to $3.1 billion, or approximately 6 percent of total loans, at December 31, 2015, a decrease of $820 million, or 27 percent. Total 
exposure, including unused commitments to extend credit and letters of credit, was $4.7 billion and $6.4 billion at December 31, 
2016 and 2015, respectively. The decrease in total exposure in the Energy business line primarily reflected reduced borrowing 
bases resulting in a reduction in total commitments, while the decrease in outstandings largely reflected energy customers taking 
actions to adjust their cash flow and reduce their bank debt. 

Criticized Energy and energy-related loans were $1.3 billion, or 50 percent of total Energy and energy-related loans, at 
December 31, 2016, compared to $1.4 billion, or 38 percent of total Energy and energy-related loans, at December 31, 2015. 
Criticized  Energy  and  energy-related  loans  increased  significantly  in  the  first  quarter  2016  due  to  the  deteriorating  financial 
condition and increased leverage of these borrowers, and the results of the SNC regulatory exam. Subsequently, these loans declined 
during the remainder of 2016 as many of these borrowers took actions to reduce the level of their bank debt. Nonaccrual Energy 
and energy-related loans increased to $373 million, or 14 percent of total Energy and energy-related loans at December 31, 2016, 
compared to $161 million, or 4 percent at December 31, 2015. The increase in these nonaccrual loans reflected the same drivers 
noted above. Nearly all of nonaccrual Energy loans were current on interest at December 31, 2016. Energy and energy-related net 
credit-related charge-offs of $121 million increased $74 million for the year ended December 31, 2016, compared to net charge-
offs of $47 million for the year ended December 31, 2015. Net credit related charge-offs included $96 million from the Energy 
portfolio and $25 million from the energy-related portfolio in 2016, compared to $28 million from the Energy portfolio and $19 
million from the energy-related portfolio in 2015.

The Corporation's allowance methodology carefully considers the various risk elements within its loan portfolio. At 
December 31, 2016, the reserve allocation for Energy and energy-related loans was over 8 percent of total Energy and energy-
related loans. The reserve allocation for Energy and energy-related loans appropriately incorporated the changing dynamics in 
Energy and energy-related loans described above, including but not limited to, migration in the portfolio and the value of collateral 
considered in determining estimated loss given default. The Corporation continued to incorporate a qualitative reserve component 
for Energy and energy-related loans at December 31, 2016, which primarily provided for recent loss trends in the Energy and 
energy-related portfolio which were in excess of estimated losses based on overall portfolio standard loss factors. 

International Exposure

International assets are subject to general risks inherent in the conduct of business in foreign countries, including economic 
uncertainties and each foreign government's regulations. Risk management practices minimize the risk inherent in international 
lending arrangements. These practices include structuring bilateral agreements or participating in bank facilities, which secure 

F-31

repayment from sources external to the borrower's country. Accordingly, such international outstandings are excluded from the 
cross-border risk of that country.

Mexico, with cross-border outstandings of $650 million (0.89 percent of total assets), $617 million (0.86 percent of total 
assets) and $670 million (0.97 percent of total assets) at December 31, 2016, 2015 and 2014, respectively, was the only country 
with outstandings between 0.75 and 1.00 percent of total assets at year-end 2016, 2015 and 2014. There were no countries with 
cross-border outstandings exceeding 1.00 percent of total assets at year-end 2016, 2015 and 2014.

The Corporation's international strategy is to focus on international companies doing business in North America, with 

an emphasis on the Corporation's primary geographic markets. 

The following table summarizes cross-border exposure to entities domiciled in Mexico and Europe at December 31, 2016 

and 2015.

(in millions)
December 31
Mexico exposure:

Commercial and industrial
Banks and other financial institutions

Total outstanding

Unfunded commitments and guarantees

Total Mexico exposure

European exposure:

Commercial and industrial
Banks and other financial institutions

Total outstanding

Unfunded commitments and guarantees

Total European exposure (a)
(a)  Primarily United Kingdom and the Netherlands.

MARKET AND LIQUIDITY RISK

2016

2015

$

$

$

$

649
1
650
161
811

231
2
233
410
643

$

$

$

$

617
—
617
206
823

285
35
320
456
776

Market risk represents the risk of loss due to adverse movements in market rates or prices, including interest rates, foreign 
exchange rates, commodity prices and equity prices. Liquidity risk represents the failure to meet financial obligations coming due 
resulting from an inability to liquidate assets or obtain adequate funding, and the inability to easily unwind or offset specific 
exposures without significant changes in pricing, due to inadequate market depth or market disruptions.

The Asset and Liability Policy Committee (ALCO) of the Corporation establishes and monitors compliance with the 
policies and risk limits pertaining to market and liquidity risk management activities. ALCO meets regularly to discuss and review 
market and liquidity risk management strategies, and consists of executive and senior management from various areas of the 
Corporation, including treasury, finance, economics, lending, deposit gathering and risk management. The Treasury Department 
mitigates market and liquidity risk under the direction of ALCO through the actions it takes to manage the Corporation's market, 
liquidity and capital positions.

Market Risk Analytics, within the Office of Enterprise Risk, supports ALCO in measuring, monitoring and managing 
interest rate risk and coordinating all other market risks. Key activities encompass: (i) providing information and analysis of the 
Corporation's balance sheet structure and measurement of interest rate and all other market risks; (ii) monitoring and reporting of 
the  Corporation's  positions  relative  to  established  policy  limits  and  guidelines;  (iii)  developing  and  presenting  analyses  and 
strategies to adjust risk positions; (iv) reviewing and presenting policies and authorizations for approval; (v) monitoring of industry 
trends and analytical tools to be used in the management of interest rate and all other market risks; and (vi) developing and 
monitoring the interest rate risk economic capital estimate.

Interest Rate Risk

Net interest income is the primary source of revenue for the Corporation. Interest rate risk arises in the normal course of 
business due to differences in the repricing and cash flow characteristics of assets and liabilities, primarily through the Corporation's 
core business activities of extending loans and acquiring deposits. The Corporation's balance sheet is predominantly characterized 
by floating-rate loans funded by core deposits. Approximately 90 percent of the Corporation's loans were floating at December 31, 
2016, of which approximately 80 percent were based on LIBOR and 20 percent were based on Prime. This creates sensitivity to 
interest  rate  movements  due  to  the  imbalance  between  the  floating-rate  loan  portfolio  and  the  more  slowly  repricing  deposit 
products. In addition, the growth and/or contraction in the Corporation's loans and deposits may lead to changes in sensitivity to 
interest rate movements in the absence of mitigating actions. Examples of such actions are purchasing investment securities, 

F-32

primarily fixed-rate, which provide liquidity to the balance sheet and act to mitigate the inherent interest sensitivity, and hedging 
the sensitivity with interest rate swaps. The Corporation actively manages its exposure to interest rate risk, with the principal 
objective of optimizing net interest income and the economic value of equity while operating within acceptable limits established 
for interest rate risk and maintaining adequate levels of funding and liquidity.

Since no single measurement system satisfies all management objectives, a combination of techniques is used to manage 
interest rate risk. These techniques examine the impact of interest rate risk on net interest income and the economic value of equity 
under a variety of alternative scenarios, including changes in the level, slope and shape of the yield curve, utilizing multiple 
simulation analyses. Simulation analyses produce only estimates of net interest income, as the assumptions used are inherently 
uncertain. Actual results may differ from simulated results due to many factors, including, but not limited to, the timing, magnitude 
and frequency of changes in interest rates, market conditions, regulatory impacts and management strategies.

Sensitivity of Net Interest Income to Changes in Interest Rates

The analysis of the impact of changes in interest rates on net interest income under various interest rate scenarios is 
management's principal risk management technique. Management models a base case net interest income under an unchanged 
interest rate environment. Existing derivative instruments entered into for risk management purposes are included in the analysis, 
but no additional hedging is currently forecasted. These derivative instruments currently comprise interest rate swaps that convert 
fixed-rate long-term debt to variable rates. This base case net interest income is then compared against interest rate scenarios in 
which rates rise or decline in a linear, non-parallel fashion from the base case over 12 months. In the first scenario presented, 
short-term interest rates increase 200 basis points, resulting in an average increase in short-term interest rates of 100 basis points 
over the period (+200 scenario). Due to the current low level of interest rates, the analysis reflects a declining interest rate scenario 
of a 75 basis point drop in short-term interest rates, to zero percent. 

Each scenario includes assumptions such as loan growth, investment security prepayment levels, depositor behavior, 
yield curve changes, loan and deposit pricing, and overall balance sheet mix and growth. Because deposit balances have continued 
to grow significantly in this persistent low rate environment, historical depositor behavior may be less indicative of future trends. 
As a result, the +200 scenario reflects a greater decrease in deposits than we have experienced historically as rates begin to rise. 
Changes in actual economic activity may result in a materially different interest rate environment as well as a balance sheet structure 
that is different from the changes management included in its simulation analysis.

The table below, as of December 31, 2016 and 2015, displays the estimated impact on net interest income during the next 

12 months by relating the base case scenario results to those from the rising and declining rate scenarios described above. 

(in millions)
December 31
Change in Interest Rates:

Rising 200 basis points
Declining to zero percent

Estimated Annual Change

2016

2015

Amount

%

Amount

%

$

212
(138)

11% $
(7)

212
(88)

12%
(5)

Sensitivity to rising rates was unchanged from December 31, 2015 to December 31, 2016. The risk to declining interest 
rates is limited by an assumed floor on interest rates of zero percent, but reflects the recent rise in short-term interest rates, allowing 
for a decline of 75 basis points at December 31, 2016, relative to a 50 basis point decline at December 31, 2015.

Assuming deposit prices move with a 25 percent beta, we expect the December 2016 Federal Reserve rate increase of 

25 basis points should result in a $70 million increase in net interest income over a 12-month period.

Sensitivity of Economic Value of Equity to Changes in Interest Rates

In addition to the simulation analysis on net interest income, an economic value of equity analysis provides an alternative 
view of the interest rate risk position. The economic value of equity is the difference between the estimate of the economic value 
of the Corporation's financial assets, liabilities and off-balance sheet instruments, derived through discounting cash flows based 
on actual rates at the end of the period and the estimated economic value after applying the estimated impact of rate movements. 
The economic value of equity analysis is based on an immediate parallel 200 basis point increase and 75 basis point decrease in 
interest rates.

F-33

The table below, as of December 31, 2016 and 2015, displays the estimated impact on the economic value of equity from 

the interest rate scenario described above.  

(in millions)
Change in Interest Rates:

Rising 200 basis points
Falling to zero percent

2016

2015

Amount

%

Amount

%

$

1,133
(891)

10% $
(7)

1,021
(538)

9%
(5)

The change in the sensitivity of the economic value of equity to a 200 basis point parallel increase in rates between 
December 31, 2015 and December 31, 2016 was primarily driven by changes in market interest rates at the middle to long end of 
the  curve,  which  most  significantly  impact  mortgage-backed  security  prepayment  and  the  value  of  deposits  without  a  stated 
maturity. Additionally, changes in actual deposit mix over the period impacted the results modestly.

LOAN MATURITIES AND INTEREST RATE SENSITIVITY

(in millions)

December 31, 2016
Commercial loans
Real estate construction loans
Commercial mortgage loans
International loans
Total

Sensitivity of loans to changes in interest rates:

Predetermined (fixed) interest rates
Floating interest rates

Total

Loans Maturing

Within One
Year (a)

After One
But Within
Five Years

After
Five Years

Total

$

$

$

$

15,320
1,216
1,631
596
18,763

785
17,979
18,764

$

$

$

$

14,448
1,516
4,941
659
21,564

2,909
18,655
21,564

$

$

$

$

1,226
137
2,359
3
3,725

802
2,922
3,724

$

$

$

$

30,994
2,869
8,931
1,258
44,052

4,496
39,556
44,052

(a)  Includes demand loans, loans having no stated repayment schedule or maturity and overdrafts.

The Corporation uses investment securities and derivative instruments as asset and liability management tools with the 
overall objective of managing the volatility of net interest income from changes in interest rates. These tools assist management 
in achieving the desired interest rate risk management objectives. Activity related to derivative instruments currently involves 
interest rate swaps effectively converting fixed-rate medium- and long-term debt to floating rate.

Risk Management Derivative Instruments

(in millions)
Risk Management Notional Activity
Balance at January 1, 2015
Additions
Maturities/amortizations
Balance at December 31, 2015
Additions
Maturities/amortizations
Balance at December 31, 2016

Interest
Rate
Contracts

Foreign
Exchange
Contracts

$

$

$

1,800
1,025
(300)
2,525
—
(250)
2,275

$

$

$

508
15,846
(15,761)
593
13,946
(13,822)
717

$

$

$

Totals

2,308
16,871
(16,061)
3,118
13,946
(14,072)
2,992

The notional amount of risk management interest rate swaps totaled $2.3 billion at December 31, 2016, and $2.5 billion
at December 31, 2015, all under fair value hedging strategies, converting fixed-rate medium- and long-term debt to floating rate. 
The fair value of risk management interest rate swaps was a net unrealized gain of $88 million at December 31, 2016, compared 
to a net unrealized gain of $147 million at December 31, 2015. Risk management interest rate swaps generated $60 million and 
$70 million of net interest income for the years ended December 31, 2016 and 2015, respectively.

In addition to interest rate swaps, the Corporation employs various other types of derivative instruments as offsetting 
positions to mitigate exposures to foreign currency risks associated with specific assets and liabilities (e.g., customer loans or 
deposits  denominated  in  foreign  currencies).  Such  instruments  may  include  foreign  exchange  forward  contracts  and  foreign 
exchange swap agreements.

Further information regarding risk management derivative instruments is provided in Note 8 to the consolidated financial 

statements.

F-34

Customer-Initiated and Other Derivative Instruments

(in millions)
Customer-Initiated and Other Notional Activity
Balance at January 1, 2015
Additions
Maturities/amortizations
Terminations
Balance at December 31, 2015
Additions
Maturities/amortizations
Terminations
Balance at December 31, 2016

Interest
Rate
Contracts

Energy
Derivative
Contracts

Foreign
Exchange
Contracts

$

$

$

12,328
3,365
(2,199)
(1,266)
12,228
3,505
(1,469)
(941)
13,323

$

$

$

4,932
1,498
(3,070)
(233)
3,127
1,347
(1,908)
(339)
2,227

$

$

$

1,994
60,054
(59,757)
—
2,291
54,478
(55,250)
(10)
1,509

$

$

$

Totals

19,254
64,917
(65,026)
(1,499)
17,646
59,330
(58,627)
(1,290)
17,059

The Corporation writes and purchases interest rate caps and floors and enters into foreign exchange contracts, interest 
rate swaps and energy derivative contracts to accommodate the needs of customers requesting such services. Changes in the fair 
value of customer-initiated and other derivatives are recognized in earnings as they occur. To limit the market risk of these activities, 
the Corporation generally takes offsetting positions with dealers. The notional amounts of offsetting positions are included in the 
table above. Customer-initiated and other notional activity represented 85 percent of total interest rate, energy and foreign exchange 
contracts at both December 31, 2016 and 2015. 

Further information regarding customer-initiated and other derivative instruments is provided in Note 8 to the consolidated 

financial statements.

Liquidity Risk and Off-Balance Sheet Arrangements

Liquidity is the ability to meet financial obligations through the maturity or sale of existing assets or the acquisition of 
additional funds. Various financial obligations, including contractual obligations and commercial commitments, may require future 
cash payments by the Corporation. Certain obligations are recognized on the consolidated balance sheets, while others are off-
balance sheet under U.S. generally accepted accounting principles.

The  following  contractual  obligations  table  summarizes  the  Corporation's  noncancelable  contractual  obligations  and 
future required minimum payments. Refer to Notes 6, 9, 10, 11, 12, and 18 to the consolidated financial statements for further 
information regarding these contractual obligations. 

Contractual Obligations

(in millions)

December 31, 2016
Deposits without a stated maturity (a)
Certificates of deposit and other deposits with a stated

maturity (a)

Short-term borrowings (a)
Medium- and long-term debt (a)
Operating leases
Commitments to fund low income housing partnerships
Other long-term obligations (b)
Total contractual obligations

Minimum Payments Due by Period
1-3
Years

Less than
1 Year

3-5
Years

More than
5 Years

$

56,160

$

— $

— $

—

Total
56,160

$

2,825
25
5,091
392
153
291
64,937

$

2,349
25
500
72
92
86
59,284

$

$

382
—
359
122
51
83
997

77
—
682
82
4
33
878

$

— $

17
—
3,550
116
6
89
3,778

250

$

$

Medium- and long-term debt (parent company only) (a) (c) $
(a)  Deposits and borrowings exclude accrued interest.
(b)  Includes unrecognized tax benefits.
(c)  Parent company only amounts are included in the medium- and long-term debt minimum payments above.

— $

350

600

$

In addition to contractual obligations, other commercial commitments of the Corporation impact liquidity. These include 
commitments to fund indirect private equity and venture capital investments, unused commitments to extend credit, standby letters 
of credit and financial guarantees, and commercial letters of credit. The following table summarizes the Corporation's commercial 
commitments and expected expiration dates by period. 

F-35

Commercial Commitments

(in millions)

December 31, 2016
Commitments to fund indirect private equity and venture

capital investments

Unused commitments to extend credit
Standby letters of credit and financial guarantees
Commercial letters of credit

Total commercial commitments

Expected Expiration Dates by Period
1-3
Less than
Years
1 Year

3-5
Years

More than
5 Years

Total

$

$

2
26,991
3,623
46
30,662

$

$

— $

— $

— $

8,554
2,960
45
11,559

$

9,884
445
1
10,330

$

5,985
199
—
6,184

$

2
2,568
19
—
2,589

Since many of these commitments expire without being drawn upon, the total amount of these commercial commitments 
does not necessarily represent the future cash requirements of the Corporation. Refer to the “Other Market Risks” section below 
and Note 8 to the consolidated financial statements for a further discussion of these commercial commitments.

Wholesale Funding

The Corporation may access the purchased funds market when necessary, which includes foreign office time deposits 
and short-term borrowings. Capacity for incremental purchased funds at December 31, 2016 included short-term FHLB advances, 
the ability to purchase federal funds, sell securities under agreements to repurchase, as well as issue deposits to institutional 
investors and issue certificates of deposit through brokers. Purchased funds totaled $44 million at December 31, 2016, compared 
to $55 million at December 31, 2015. At December 31, 2016, the Bank had pledged loans totaling $23.0 billion which provided 
for up to $18.5 billion of available collateralized borrowing with the FRB.

The Bank is a member of the FHLB of Dallas, Texas, which provides short- and long-term funding to its members through 
advances collateralized by real estate-related assets. Actual borrowing capacity is contingent on the amount of collateral available 
to be pledged to the FHLB. At December 31, 2016, $15.5 billion of real estate-related loans were pledged to the FHLB as blanket 
collateral for current and potential future borrowings. As of December 31, 2016, the Corporation had $2.8 billion of outstanding 
borrowings from the FHLB maturing in 2026, and capacity for potential future borrowings of approximately $3.9 billion.

In the second quarter 2016, the Bank borrowed $2.8 billion of 10-year, floating-rate FHLB advances due 2026. The 
interest rate on each of eight notes resets every four weeks, based on the FHLB auction rate, with the reset date of each note 
scheduled at one-week intervals. Each note may be prepaid in full, without penalty, at each scheduled reset date. Proceeds were 
used for general corporate purposes, including to provide cost-effective funding for debt maturing in the fourth quarter 2016.

Additionally, the Bank had the ability to issue up to $14.0 billion of debt at December 31, 2016 under an existing $15.0 
billion medium-term senior note program which allows the issuance of debt with maturities between three months and 30 years. 
The Corporation also maintains a shelf registration statement with the Securities and Exchange Commission from which it may 
issue debt and/or equity securities.

The ability of the Corporation and the Bank to raise funds at competitive rates is impacted by rating agencies' views of 
the credit quality, liquidity, capital and earnings of the Corporation and the Bank. As of December 31, 2016, the four major rating 
agencies had assigned the following ratings to long-term senior unsecured obligations of the Corporation and the Bank. A security 
rating is not a recommendation to buy, sell, or hold securities and may be subject to revision or withdrawal at any time by the 
assigning rating agency. Each rating should be evaluated independently of any other rating.

Comerica Incorporated

Comerica Bank

December 31, 2016
Standard and Poor’s (a)
Moody’s Investors Service
Fitch Ratings
DBRS
(a)  In February 2017, Standard and Poor's revised its outlook to "Stable."

BBB+
A3
A
A

Rating

Outlook
Negative
Negative
Negative
Stable

Rating

A-
A3
A
A (High)

Outlook
Negative
Negative
Negative
Stable

The Corporation satisfies liquidity requirements with either liquid assets or various funding sources. Liquid assets totaled 
$18.2 billion at December 31, 2016, compared to $16.4 billion at December 31, 2015. Liquid assets include cash and due from 
banks,  federal  funds  sold,  interest-bearing  deposits  with  banks,  other  short-term  investments  and  unencumbered  investment 
securities.

In September 2014, U.S. banking regulators issued a final rule implementing a quantitative liquidity requirement in the 
U.S. generally consistent with the LCR minimum liquidity measure established under the Basel III liquidity framework. Under 
the rule, the Corporation is subject to a modified LCR standard, which requires a financial institution to hold a minimum level of 
high-quality liquid assets to fully cover modified net cash outflows under a 30-day systematic liquidity stress scenario. The rule 

F-36

was effective for the Corporation on January 1, 2016. During the transition year, 2016, the Corporation was required to maintain 
a minimum LCR of 90 percent. Beginning January 1, 2017, and thereafter, the minimum required LCR will be 100 percent. At 
each quarter-end in 2016, the Corporation was in compliance with the fully phased-in LCR requirement, plus a buffer.

In  the  second  quarter  2016,  U.S.  banking  regulators  issued  a  notice  of  proposed  rulemaking  (the  proposed  rule) 
implementing a second quantitative liquidity requirement in the U.S. generally consistent with the Net Stable Funding Ratio 
(NSFR) minimum liquidity measure established under the Basel III liquidity framework. Under the proposed rule, the Corporation 
will be subject to a modified NSFR standard effective January 1 2018, which requires a financial institution to hold a minimum 
level of available longer-term, stable sources of funding to fully cover a modified amount of required longer-term stable funding, 
over a one-year period. The Corporation does not currently expect the proposed rule to have a material impact on its liquidity 
needs.

The  Corporation  regularly  evaluates  its  ability  to  meet  funding  needs  in  unanticipated,  stressed  environments.  In 
conjunction with the quarterly 200 basis point interest rate simulation analyses, discussed in the “Interest Rate Sensitivity” section 
of this financial review, liquidity ratios and potential funding availability are examined. Each quarter, the Corporation also evaluates 
its ability to meet liquidity needs under a series of broad events, distinguished in terms of duration and severity. The evaluation 
as of December 31, 2016 projected that sufficient sources of liquidity were available under each series of events.

Other Market Risks

Market risk related to the Corporation's trading instruments is not significant, as trading activities are limited. Certain 
components of the Corporation's noninterest income, primarily fiduciary income, are at risk to fluctuations in the market values 
of underlying assets, particularly equity and debt securities. Other components of noninterest income, primarily brokerage fees, 
are at risk to changes in the volume of market activity. 

OPERATIONAL RISK

Operational risk represents the risk of loss resulting from inadequate or failed internal processes, people and systems, or 
from external events. The definition includes legal risk, which is the risk of loss resulting from failure to comply with laws and 
regulations as well as prudent ethical standards and contractual obligations. The definition does not include strategic or reputational 
risks. Although  operational  losses  are  experienced  by  all  companies  and  are  routinely  incurred  in  business  operations,  the 
Corporation recognizes the need to identify and control operational losses and seeks to limit losses to a level deemed appropriate 
by  management,  as  outlined  in  the  Corporation’s  risk  appetite  statement.  The  appropriate  risk  level  is  determined  through 
consideration of the nature of the Corporation's business and the environment in which it operates, in combination with the impact 
from, and the possible impact on, other risks faced by the Corporation. Operational risk is mitigated through a system of internal 
controls that are designed to keep operating risks at appropriate levels. The Operational Risk Management Committee monitors 
risk management techniques and systems. The Corporation has developed a framework that includes a centralized operational risk 
management  function  and  business/support  unit  risk  coordinators  responsible  for  managing  operational  risk  specific  to  the 
respective business lines.

COMPLIANCE RISK

Compliance risk represents the risk of regulatory sanctions or financial loss resulting from the Corporation's failure to 
comply with regulations and standards of good banking practice. The impact of such risks is highly interdependent with strategic 
risk, as the reputational impact from compliance breaches can be severe. Activities which may expose the Corporation to compliance 
risk include, but are not limited to, those dealing with the prevention of money laundering, privacy and data protection, community 
reinvestment initiatives, fair lending, consumer protection, employment and tax matters, over-the-counter derivative activities and 
other activities regulated by the Dodd-Frank Wall Street Reform and Consumer Protection Act.

The  Enterprise-Wide  Compliance  Committee,  comprising  senior  and  executive  business  unit  managers,  as  well  as 
managers responsible for compliance, audit and overall risk, oversees compliance risk. This enterprise-wide approach provides a 
consistent view of compliance across the organization. The Enterprise-Wide Compliance Committee also ensures that appropriate 
actions are implemented in business units to mitigate risk to an acceptable level.

STRATEGIC RISK

Strategic risk represents the risk of loss due to impairment of reputation, failure to fully develop and execute business 
plans,  failure  to  assess  current  and  new  opportunities  in  business,  markets  and  products,  failure  to  determine  appropriate 
consideration for risks accepted, and any other event not identified in the defined risk categories of credit, market and liquidity, 
operational or compliance risks. Mitigation of the various risk elements that represent strategic risk is achieved through various 
metrics and initiatives to help the Corporation better understand, measure and report on such risks.

F-37

CRITICAL ACCOUNTING POLICIES

The Corporation’s consolidated financial statements are prepared based on the application of accounting policies, the 
most significant of which are described in Note 1. These policies require numerous estimates and strategic or economic assumptions, 
which may prove inaccurate or subject to variations. Changes in underlying factors, assumptions or estimates could have a material 
impact on the Corporation’s future financial condition and results of operations. At December 31, 2016, the most critical of these 
significant accounting policies were the policies related to the allowance for credit losses, fair value measurement, goodwill, 
pension plan accounting and income taxes. These policies were reviewed with the Audit Committee of the Corporation’s Board 
of Directors and are discussed more fully below.

ALLOWANCE FOR CREDIT LOSSES

The allowance for credit losses, which includes both the allowance for loan losses and the allowance for credit losses on 
lending-related commitments, is calculated with the objective of maintaining a reserve sufficient to absorb estimated probable 
losses. Management's determination of the appropriateness of the allowance is based on periodic evaluations of the loan portfolio, 
lending-related commitments, and other relevant factors. This evaluation is inherently subjective as it requires numerous estimates, 
including the loss content for internal risk ratings, collateral values, the amounts and timing of expected future cash flows, and 
for lending-related commitments, estimates of the probability of draw on unused commitments. 

In determining the allowance for credit losses, the Corporation individually evaluates certain impaired loans, applies 
standard reserve factors to pools of homogeneous loans and lending-related commitments and incorporates qualitative adjustments.  
Standard loss factors, applied to the majority of the Corporation's loan portfolio and lending-related commitments, are based on 
estimates of probabilities of default for individual risk ratings over the loss emergence period and loss given default. Since standard 
loss factors are applied to large pools of loans, even minor changes in these factors could significantly affect the Corporation's 
determination of the appropriateness of the allowance for credit losses. To illustrate, if recent loss experience dictated that the 
estimated standard loss factors would be changed by five percent of the estimate across all loan risk ratings, the allowance for 
loan losses as of December 31, 2016 would change by approximately $30 million. Loss emergence periods are used to determine 
the most appropriate default horizon associated with the calculation of probabilities of default. Loss emergence periods tend to 
lengthen during benign economic periods and shorten during periods of economic distress. Considered in isolation, lengthening 
the loss emergence period assumption would result in an increase to the allowance for credit losses. Because standard loss factors 
are applied to pools of loans based on the Corporation's internal risk rating system, loss estimates are highly dependent on the 
accuracy of the risk rating assigned to each loan. The inherent imprecision in the risk rating system resulting from inaccuracy in 
assigning and/or entering risk ratings in the loan accounting system is monitored by the Corporation's asset quality review function 
and incorporated in a qualitative adjustment. The Corporation may also include qualitative adjustments intended to capture the 
impact of certain other uncertainties that exist but are not yet reflected in the standard reserve factors. These qualitative adjustments 
are based on management’s analysis of factors such as portfolios where recent historical losses exceed expected losses or known 
recent  events  are  expected  to  alter  risk  ratings  once  evidence  is  acquired,  observable  macroeconomic  metrics,  including 
consideration of regional metrics within the Corporation's footprint, and a qualitative assessment of the lending environment, 
including underwriting standards, current economic and political conditions, and other factors affecting credit quality. Deterioration 
in  metrics  and  credit  trends  included  in  this  analysis  would  result  in  an  increase  to  the  qualitative  adjustment  increasing  the 
allowance for credit losses. Qualitative reserves at December 31, 2016 primarily included components for portfolios where recent 
loss trends were in excess of estimated losses based on overall portfolio standard loss factors, geographic and industry concentration 
risks, and changes in market conditions compared to the conditions that existed at the date of the most recent annual update to 
standard reserve factors.

For further discussion of the methodology used in the determination of the allowance for credit losses, refer to Note 1 to 
the consolidated financial statements. To the extent actual outcomes differ from management estimates, additional provision for 
credit losses may be required that would adversely impact earnings in future periods. A substantial majority of the allowance is 
assigned to business segments. Any earnings impact resulting from actual outcomes differing from management estimates would 
primarily affect the Business Bank segment.

FAIR VALUE MEASUREMENT

Investment securities available-for-sale, derivatives and deferred compensation plan assets and associated liabilities are 
recorded at fair value on a recurring basis. Additionally, from time to time, other assets and liabilities may be recorded at fair value 
on a nonrecurring basis, such as impaired loans that have been reduced based on the fair value of the underlying collateral, other 
real  estate  (primarily  foreclosed  property),  nonmarketable  equity  securities  and  certain  other  assets  and  liabilities.  These 
nonrecurring fair value adjustments typically involve write-downs of individual assets or application of lower of cost or fair value 
accounting.

Fair value is an estimate of the exchange price that would be received to sell an asset or paid to transfer a liability in an 
orderly  transaction  (i.e.,  not  a  forced  transaction,  such  as  a  liquidation  or  distressed  sale)  between  market  participants  at  the 

F-38

measurement date and is based on the assumptions market participants would use when pricing an asset or liability. Fair value 
measurement and disclosure guidance establishes a three-level hierarchy for disclosure of assets and liabilities recorded at fair 
value. Notes 1 and 2 to the consolidated financial statements includes information about the fair value hierarchy, the extent to 
which fair value is used to measure assets and liabilities and the valuation methodologies and key inputs used. 

At December 31, 2016, assets and liabilities measured using observable inputs that are classified as Level 1 or Level 2 
represented 97.0 percent and 100.0 percent of total assets and liabilities recorded at fair value, respectively, and Level 3 assets 
totaled $351 million, or 3.0 percent of total assets recorded at fair value. Valuations generated from model-based techniques that 
use at least one significant assumption not observable in the market are considered Level 3. Unobservable assumptions reflect 
estimates of assumptions market participants would use in pricing the asset or liability. Fair value measurements for assets and 
liabilities where limited or no observable market data exists often involves significant judgments about assumptions, such as 
determining an appropriate discount rate that factors in both liquidity and risk premiums, and in many cases may not reflect 
amounts exchanged in a current sale of the financial instrument. In addition, changes in market conditions may reduce the availability 
of quoted prices or observable data. For example, reduced liquidity in the capital markets or changes in secondary market activities 
could result in observable market inputs becoming unavailable. Therefore, when market data is not available, the Corporation 
would use valuation techniques requiring more management judgment to estimate the appropriate fair value. 

GOODWILL 

At December 31, 2016 and 2015, goodwill totaled $635 million, allocated to the Corporation's three reporting units as 
follows: $380 million allocated to the Business Bank, $194 million allocated to the Retail Bank and $61 million allocated to Wealth 
Management. 

In performing the annual impairment test, the Corporation compares the carrying amount of identified reporting units, 
including goodwill, with their estimated fair value. The Corporation considers the carrying value of each reporting unit to be the 
greater of economic or regulatory capital. Economic capital is assigned using internal management methodologies on the basis of 
each reporting unit's credit, operational and interest rate risks, as well as goodwill. To determine regulatory capital, each reporting 
unit is assigned sufficient capital such that their respective Tier 1 ratio, based on allocated risk-weighted assets, is the same as that 
of the Corporation. Using this two-pronged approach, the Corporation's equity is fully allocated to its reporting units except for 
capital held primarily for the risk associated with the securities portfolio that is assigned to the Finance segment of the Corporation. 

Determining the fair value of reporting units is a subjective process involving the use of estimates and judgments related 
to the selection of inputs such as future cash flows, discount rates, comparable public company multiples, applicable control 
premiums and economic expectations used in determining the interest rate environment. The estimated fair values of the reporting 
units are determined using a blend of two commonly used valuation techniques: the market approach and the income approach. 
For  the  market  approach,  valuations  of  reporting  units  consider  a  combination  of  earnings,  equity  and  other  multiples  from 
companies  with  characteristics  similar  to  the  reporting  unit.  Since  the  fair  values  determined  under  the  market  approach  are 
representative of noncontrolling interests, the valuations accordingly incorporate a control premium. For the income approach, 
estimated future cash flows and terminal value are discounted. Estimated future cash flows are derived from internal forecasts and 
economic  expectations  for  each  reporting  unit  which  incorporate  uncertainty  factors  inherent  to  long-term  projections.  The 
applicable discount rate is based on the imputed cost of equity capital appropriate for each reporting unit, which incorporates the 
risk-free rate of return, the level of non-diversified risk associated with companies with characteristics similar to the reporting 
unit, a size risk premium and a market equity risk premium. 

Economic conditions impact the assumptions related to interest and growth rates, loss rates and imputed cost of equity 
capital. The fair value estimates for each reporting unit incorporated current economic and market conditions, including the recent 
Federal Reserve announcements and the impact of legislative and regulatory changes, to the extent known and as described above. 
However, further weakening in the economic environment, such as adverse changes in interest rates, a decline in the performance 
of the reporting units or other factors could cause the fair value of one or more of the reporting units to fall below their carrying 
value,  resulting  in  a  goodwill  impairment  charge.  Additionally,  new  legislative  or  regulatory  changes  not  anticipated  in 
management's expectations may cause the fair value of one or more of the reporting units to fall below the carrying value, resulting 
in a goodwill impairment charge. Any impairment charge would not affect the Corporation's regulatory capital ratios, tangible 
common equity ratio or liquidity position. 

The annual test of goodwill impairment was performed as of the beginning of the third quarter 2016. The Corporation's 
assumptions included modest increases to the Federal funds target rate until eventually reaching a normal interest rate environment. 
At the conclusion of the first step of the annual goodwill impairment tests performed in the third quarter 2016, the estimated fair 
values of all reporting units substantially exceeded their carrying amounts, including goodwill. The results of the annual test of 
the goodwill impairment test for each reporting unit were subjected to stress testing as appropriate. For further information about 
the Corporation's goodwill accounting policy, refer to Note 1 to the consolidated financial statements. 

PENSION PLAN ACCOUNTING

The Corporation has a qualified and non-qualified defined benefit pension plan. Prior to January 1, 2017, the plans were 
in effect for substantially all salaried employees hired before January 1, 2007. In October 2016, the Corporation modified its 
F-39

defined benefit plans to convert most participants, including employees participating in the Corporation's defined contribution 
plan, to a cash balance formula effective January 1, 2017. Participants who were age 60 or older as of December 31, 2016 continue 
to be eligible for the final average pay benefit. In addition, the Corporation added a lump-sum payment option, effective January 
1,  2017. These  changes  were  part  of  the  GEAR  Up  initiative.  For  more  information  about  the  defined  benefit  pension  plan 
modifications, see Note 17 to the consolidated financial statements. Benefits under the cash balance formula are based on years 
of service, age, compensation and an interest credit based on the 30-year Treasury rate. Assumptions are made concerning future 
events that will determine the amount and timing of required benefit payments, funding requirements and defined benefit pension 
expense. The major assumptions are the discount rate used in determining the current benefit obligation, the long-term rate of 
return expected on plan assets, the form of payment election and the projected mortality rate. The discount rate is determined by 
matching the expected cash flows of the pension plans to a portfolio of high quality corporate bonds as of the measurement date, 
December 31. The long-term rate of return expected on plan assets is set after considering both long-term returns in the general 
market and long-term returns experienced by the assets in the plan. The current target asset allocation model for the plans is 
provided in Note 17 to the consolidated financial statements. The expected returns on these various asset categories are blended 
to derive one long-term return assumption. The assets are invested in certain collective investment funds, common stocks, U.S. 
Treasury and other U.S. government agency securities, and corporate and municipal bonds and notes. The form of payment election 
assumption is based on market experience. Mortality rate assumptions are based on mortality tables published by third-parties 
such as the Society of Actuaries (SOA), considering other available information including historical data as well as studies and 
publications from reputable sources. The Corporation reviews its pension plan assumptions on an annual basis with its actuarial 
consultants to determine if the assumptions are reasonable and adjusts the assumptions to reflect changes in future expectations.

The assumptions used to calculate 2017 defined benefit plan pension expense (benefit) were as follows:

Discount rate
Long-term rate of return on plan assets
Lump sum payment election rate:

Existing participants
Future participants

Mortality table:
Base table (a)
Mortality improvement scale (a)

(a)  Issued by the Society of Actuaries in October 2016.

4.23%
6.50%

60%
80%

RP-2016
MP-2016

In  2017,  total  retirement  plan  expense,  including  defined  contribution  plan  expense,  is  expected  to  decrease  by 
approximately  $32  million.  The  $6  million  defined  benefit  pension  expense  recorded  in  2016  is  expected  to  improve  by 
approximately  $22  million  to  a  benefit  of  about  $16  million  in  2017  primarily  as  a  result  of  the  previously  described  plan 
amendments.

Changing the 2017 discount rate and long-term rate of return by 25 basis points would have the following impact on 

defined benefit pension expense in 2017:

Key Actuarial Assumption:

Discount rate
Long-term rate of return

25 Basis Point

Increase

Decrease

$

(7.0) $
(6.1)

7.0
6.1

If the lump-sum payment election rate were zero, 2017 defined benefit pension expense would increase by approximately 

$6 million.

Due to the long-term nature of pension plan assumptions, actual results may differ significantly from the actuarial-based 
estimates. Differences resulting in actuarial gains or losses are required to be recorded in shareholders' equity as part of accumulated 
other comprehensive loss and amortized to defined benefit pension expense in future years. Refer to Note 17 to the consolidated 
financial statements for further information.

INCOME TAXES

The calculation of the Corporation's income tax provision and tax-related accruals is complex and requires the use of 
estimates and judgments. The provision for income taxes is the sum of income taxes due for the current year and deferred taxes. 
Deferred taxes arise from temporary differences between the income tax basis and financial accounting basis of assets and liabilities. 
Accrued taxes represent the net estimated amount due to or to be received from taxing jurisdictions, currently or in the future, and 
are included in “accrued income and other assets” or “accrued expenses and other liabilities” on the consolidated balance sheets. 
The Corporation assesses the relative risks and merits of tax positions for various transactions after considering statutes, regulations, 

F-40

judicial precedent and other available information and maintains tax accruals consistent with these assessments. The Corporation 
is subject to audit by taxing authorities that could question and/or challenge the tax positions taken by the Corporation. 

Included in net deferred taxes are deferred tax assets. Deferred tax assets are evaluated for realization based on available 
evidence of loss carryback capacity, projected future reversals of existing taxable temporary differences and assumptions made 
regarding future events. A valuation allowance is provided when it is more-likely-than-not that some portion of the deferred tax 
asset will not be realized. 

Changes in the estimate of accrued taxes occur due to changes in tax law, interpretations of existing tax laws, new judicial 
or regulatory guidance, and the status of examinations conducted by taxing authorities that impact the relative risks and merits of 
tax  positions  taken  by  the  Corporation. These  changes,  when  they  occur,  impact  the  estimate  of  accrued  taxes  and  could  be 
significant to the operating results of the Corporation. For further information on tax accruals and related risks, see Note 18 to the 
consolidated financial statements.

F-41

The following table provides a reconciliation of non-GAAP financial measures used in this financial review with financial 

SUPPLEMENTAL FINANCIAL DATA

measures defined by GAAP.

(dollar amounts in millions)
December 31
Tangible Common Equity Ratio:
Common shareholders' equity
Less:

Goodwill
Other intangible assets
Tangible common equity
Total assets
Less:

Goodwill
Other intangible assets

Tangible assets
Common equity ratio
Tangible common equity ratio
Tangible Common Equity per Share of Common Stock:
Common shareholders' equity
Tangible common equity
Shares of common stock outstanding (in millions)
Common shareholders' equity per share of common stock
Tangible common equity per share of common stock

2016

2015

2014

2013

2012

$

7,796

$

7,560

$

7,402

$

7,150

$

6,939

635
10
$
7,151
$ 72,978

635
10
$ 72,333

10.68%
9.89

$

$

7,796
7,151
175
44.47
40.79

$
$

$

$

$

635
14
6,911
71,877

635
14
71,228
10.52%
9.70

7,560
6,911
176
43.03
39.33

$
$

$

$

$

635
15
6,752
69,186

635
15
68,536
10.70%
9.85

7,402
6,752
179
41.35
37.72

$
$

$

$

$

635
17
6,498
65,224

635
17
64,572
10.97%
10.07

7,150
6,498
182
39.22
35.64

$
$

$

$

$

635
22
6,282
65,066

635
22
64,409
10.67%
9.76

6,939
6,282
188
36.86
33.36

The tangible common equity ratio removes preferred stock and the effect of intangible assets from capital and the effect 
of intangible assets from total assets and tangible common equity per share of common stock removes the effect of intangible 
assets from common shareholders' equity per share of common stock. The Corporation believes these measurements are meaningful 
measures of capital adequacy used by investors, regulators, management and others to evaluate the adequacy of common equity 
and to compare against other companies in the industry.

F-42

FORWARD-LOOKING STATEMENTS

This report includes forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. In 
addition, the Corporation may make other written and oral communications from time to time that contain such statements. All 
statements  regarding  the  Corporation's  expected  financial  position,  strategies  and  growth  prospects,  including  the  GEAR  Up 
initiative, and general economic conditions expected to exist in the future are forward-looking statements. The words, “anticipates,” 
“believes,”  "contemplates,"  “feels,”  “expects,”  “estimates,”  “seeks,”  “strives,”  “plans,”  “intends,”  “outlook,”  “forecast,” 
“position,” “target,” “mission,” “assume,” “achievable,” “potential,” “strategy,” “goal,” “aspiration,” “opportunity,” “initiative,” 
“outcome,”  “continue,”  “remain,”  “maintain,”  "on  course,"  “trend,”  “objective,”  “looks  forward,”  "projects,"  "models"  and 
variations of such words and similar expressions, or future or conditional verbs such as “will,” “would,” “should,” “could,” “might,” 
“can,” “may” or similar expressions, as they relate to the Corporation or its management, are intended to identify forward-looking 
statements. The Corporation cautions that forward-looking statements are subject to numerous assumptions, risks and uncertainties, 
which change over time. Forward-looking statements speak only as of the date the statement is made, and the Corporation does 
not undertake to update forward-looking statements to reflect facts, circumstances, assumptions or events that occur after the date 
the  forward-looking  statements  are  made. Actual  results  could  differ  materially  from  those  anticipated  in  forward-looking 
statements and future results could differ materially from historical performance.

In  addition  to  factors  mentioned  elsewhere  in  this  report  or  previously  disclosed  in  the  Corporation's  SEC  reports 
(accessible on the SEC's website at www.sec.gov or on the Corporation's website at www.comerica.com), actual results could 
differ materially from forward-looking statements and future results could differ materially from historical performance due to a 
variety of reasons, including but not limited to, the following factors:

• 
• 

general political, economic or industry conditions, either domestically or internationally, may be less favorable than expected;
governmental monetary and fiscal policies may adversely affect the financial services industry, and therefore impact the 
Corporation's financial condition and results of operations;

•  whether the Corporation may achieve opportunities for revenue enhancements and efficiency improvements under the GEAR 

• 

• 
• 

• 
• 

• 
• 

• 

• 
• 
• 

• 
• 

Up initiative, or changes in the scope or assumptions underlying the GEAR Up initiative; 
the Corporation must maintain adequate sources of funding and liquidity to meet regulatory expectations, support its operations 
and fund outstanding liabilities;
compliance with more stringent capital and liquidity requirements may adversely affect the Corporation;
declines in the businesses or industries of the Corporation's customers - in particular, the energy industry - could cause increased 
credit losses or decreased loan balances, which could adversely affect the Corporation;
unfavorable developments concerning credit quality could adversely affect the Corporation's financial results:
operational  difficulties,  failure  of  technology  infrastructure  or  information  security  incidents  could  adversely  affect  the 
Corporation's business and operations;
changes in regulation or oversight may have a material adverse impact on the Corporation's operations;
the Corporation relies on other companies to provide certain key components of its business infrastructure, and certain failures 
could materially adversely affect operations;
changes in the financial markets, including fluctuations in interest rates and their impact on deposit pricing, could adversely 
affect the Corporation's net interest income and balance sheet;
reduction in the Corporation's credit ratings could adversely affect the Corporation and/or the holders of its securities;
the soundness of other financial institutions could adversely affect the Corporation;
the introduction, implementation, withdrawal, success and timing of business initiatives and strategies may be less successful 
or may be different than anticipated, which could adversely affect the Corporation's business;
damage to Comerica’s reputation could damage its businesses;
the Corporation may not be able to utilize technology to efficiently and effectively develop, market and deliver new products 
and services to its customers;
competitive product and pricing pressures among financial institutions within the Corporation's markets may change;
changes in customer behavior may adversely impact the Corporation's business, financial condition and results of operations;
any future strategic acquisitions or divestitures may present certain risks to the Corporation's business and operations;

• 
• 
• 
•  management's ability to maintain and expand customer relationships may differ from expectations;
•  management's ability to retain key officers and employees may change;
• 

legal  and  regulatory  proceedings  and  related  financial  services  industry  matters,  including  those  directly  involving  the 
Corporation and its subsidiaries, could adversely affect the Corporation or the financial services industry in general;

•  methods of reducing risk exposures might not be effective;
adverse effects from terrorist activities or other hostilities; 
• 
catastrophic events, including, but not limited to, hurricanes, tornadoes, earthquakes, fires, droughts and floods, may adversely 
• 
affect the general economy, financial and capital markets, specific industries, and the Corporation;
the tax treatment of corporations could be subject to potential legislative, administrative or judicial changes or interpretations;
changes in accounting standards could materially impact the Corporation's financial statements; and
the Corporation's accounting policies and processes are critical to the reporting of financial condition and results of operations. 
They require management to make estimates about matters that are uncertain.

• 
• 
• 

F-43

CONSOLIDATED BALANCE SHEETS
Comerica Incorporated and Subsidiaries

(in millions, except share data)
December 31

ASSETS
Cash and due from banks

Interest-bearing deposits with banks
Other short-term investments

Investment securities available-for-sale
Investment securities held-to-maturity

Commercial loans
Real estate construction loans
Commercial mortgage loans
Lease financing
International loans
Residential mortgage loans
Consumer loans

Total loans

Less allowance for loan losses

Net loans
Premises and equipment
Accrued income and other assets

Total assets

LIABILITIES AND SHAREHOLDERS’ EQUITY
Noninterest-bearing deposits

Money market and interest-bearing checking deposits
Savings deposits
Customer certificates of deposit
Foreign office time deposits

Total interest-bearing deposits
Total deposits

Short-term borrowings
Accrued expenses and other liabilities
Medium- and long-term debt
Total liabilities

Common stock - $5 par value:

Authorized - 325,000,000 shares
Issued - 228,164,824 shares

Capital surplus
Accumulated other comprehensive loss
Retained earnings
Less cost of common stock in treasury - 52,851,156 shares at 12/31/16 and 52,457,113 shares at

12/31/15

Total shareholders’ equity
Total liabilities and shareholders’ equity

See notes to consolidated financial statements.

F-44

2016

2015

$

1,249

$

5,969
92

10,787
1,582

30,994
2,869
8,931
572
1,258
1,942
2,522
49,088
(730)
48,358
501
4,440
72,978

31,540

22,556
2,064
2,806
19
27,445
58,985
25
1,012
5,160
65,182

1,141
2,135
(383)
7,331

$

$

(2,428)
7,796
72,978

$

$

$

$

1,157

4,990
113

10,519
1,981

31,659
2,001
8,977
724
1,368
1,870
2,485
49,084
(634)
48,450
550
4,117
71,877

30,839

23,532
1,898
3,552
32
29,014
59,853
23
1,383
3,058
64,317

1,141
2,173
(429)
7,084

(2,409)
7,560
71,877

CONSOLIDATED STATEMENTS OF INCOME
Comerica Incorporated and Subsidiaries

(in millions)
Years Ended December 31
INTEREST INCOME
Interest and fees on loans
Interest on investment securities
Interest on short-term investments

Total interest income

INTEREST EXPENSE
Interest on deposits
Interest on medium- and long-term debt
Total interest expense
Net interest income

Provision for credit losses

Net interest income after provision for credit losses

NONINTEREST INCOME
Card fees
Service charges on deposit accounts
Fiduciary income
Commercial lending fees
Letter of credit fees
Bank-owned life insurance
Foreign exchange income
Brokerage fees
Net securities losses
Other noninterest income

Total noninterest income

NONINTEREST EXPENSES
Salaries and benefits expense
Outside processing fee expense
Net occupancy expense
Equipment expense
Restructuring charges
Software expense
FDIC insurance expense
Advertising expense
Litigation-related expense
Gain on debt redemption
Other noninterest expenses

Total noninterest expenses

Income before income taxes
Provision for income taxes
NET INCOME
Less income allocated to participating securities
Net income attributable to common shares
Earnings per common share:

Basic
Diluted

Cash dividends declared on common stock
Cash dividends declared per common share

See notes to consolidated financial statements.

F-45

2016

2015

2014

$

$

$

$

$

$

1,635
247
27
1,909

40
72
112
1,797
248
1,549

303
219
190
89
50
42
42
19
(5)
102
1,051

961
336
157
53
93
119
54
21
1
—
135
1,930
670
193
477
4
473

2.74
2.68

154
0.89

$

$

$

1,551
216
17
1,784

43
52
95
1,689
147
1,542

276
223
187
99
53
40
40
17
(2)
102
1,035

1,009
318
159
53
—
99
37
24
(32)
—
160
1,827
750
229
521
6
515

2.93
2.84

148
0.83

1,525
211
14
1,750

45
50
95
1,655
27
1,628

81
215
180
98
57
39
40
17
—
130
857

980
111
171
57
—
95
33
23
4
(32)
173
1,615
870
277
593
7
586

3.28
3.16

143
0.79

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Comerica Incorporated and Subsidiaries

(in millions)
Years Ended December 31

NET INCOME

OTHER COMPREHENSIVE INCOME (LOSS)

Unrealized (losses) gains on investment securities:

Net unrealized holding (losses) gains arising during the period
Less:

Reclassification adjustment for net securities (losses) gains included in net

income

Net losses realized as a yield adjustment in interest on investment securities

Change in net unrealized (losses) gains before income taxes

Defined benefit pension and other postretirement plans adjustment:

Actuarial loss arising during the period
Prior service credit arising during the period
Adjustments for amounts recognized as components of net periodic benefit

cost:
Amortization of actuarial net loss
Amortization of prior service (credit) cost

Change in defined benefit pension and other postretirement plans adjustment

before income taxes

Total other comprehensive income (loss) before income taxes
Provision (benefit) for income taxes
Total other comprehensive income (loss), net of tax

2016

2015

2014

$

477

$

521

$

593

(70)

—
(3)
(67)

(134)
234

46
(7)

139

72
26
46

(55)

(2)
(8)
(45)

(57)
3

70
1

17

(28)
(11)
(17)

166

1
—
165

(240)
—

39
3

(198)

(33)
(12)
(21)

572

COMPREHENSIVE INCOME

$

523

$

504

$

See notes to consolidated financial statements.

F-46

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY
Comerica Incorporated and Subsidiaries

(in millions, except per share data)

BALANCE AT DECEMBER 31, 2013
Net income
Other comprehensive income, net of tax
Cash dividends declared on common

stock ($0.79 per share)
Purchase of common stock
Net issuance of common stock under

employee stock plans
Share-based compensation
Other
BALANCE AT DECEMBER 31, 2014
Net income
Other comprehensive loss, net of tax
Cash dividends declared on common

stock ($0.83 per share)
Purchase of common stock
Purchase and retirement of warrants
Net issuance of common stock under

employee stock plans

Net issuance of common stock for

warrants

Share-based compensation

BALANCE AT DECEMBER 31, 2015
Net income
Other comprehensive income, net of tax
Cash dividends declared on common

stock ($0.89 per share)
Purchase of common stock
Net issuance of common stock under

employee stock plans

Net issuance of common stock for

warrants

Share-based compensation

Common Stock

Shares
Outstanding

182.3
—
—

—
(5.4)

2.1
—
—
179.0
—
—

—
(5.3)
—

1.0

1.0
—

175.7
—
—

—
(6.8)

4.1

2.3

—

Amount

$ 1,141
—
—

Capital
Surplus

$ 2,179
—
—

—
—

—
—
—
1,141
—
—

—
—
—

—

—

1,141
—
—

—
—

—

—

—

—
—

(27)
38
(2)
2,188
—
—

—
—
(10)

(22)

(21)
38

2,173
—
—

—
—

(15)

(57)

34

Accumulated
Other
Comprehensive
Loss

Retained
Earnings

Treasury
Stock

Total
Shareholders’
Equity

$

(391) $
—
(21)

—
—

—
—
—
(412)
—
(17)

—
—
—

—

—

(429)
—
46

—
—

—

—

—

6,318
593
—

(143)
—

(24)
—
—
6,744
521
—

(148)
—
—

(11)

(22)
—

7,084
477
—

(154)
—

(27)

(49)

—

$

(2,097) $
—
—

—
(260)

96
—
2
(2,259)
—
—

—
(240)
—

47

43
—

(2,409)
—
—

—
(310)

185

106

—

7,150
593
(21)

(143)
(260)

45
38
—
7,402
521
(17)

(148)
(240)
(10)

14

—
38

7,560
477
46

(154)
(310)

143

—

34

BALANCE AT DECEMBER 31, 2016

175.3

$ 1,141

$ 2,135

$

(383) $

7,331

$

(2,428) $

7,796

See notes to consolidated financial statements.

F-47

CONSOLIDATED STATEMENTS OF CASH FLOWS
Comerica Incorporated and Subsidiaries

(in millions)
Years Ended December 31
OPERATING ACTIVITIES

2016

2015

2014

Net income
Adjustments to reconcile net income to net cash provided by operating activities:

$

477

$

521

$

Provision for credit losses
(Benefit) provision for deferred income taxes
Depreciation and amortization
Net periodic defined benefit cost
Share-based compensation expense
Net amortization of securities
Accretion of loan purchase discount
Net securities losses
Net gains on sales of foreclosed property
Gain on debt redemption
Excess tax benefits from share-based compensation arrangements
Net change in:

Trading securities
Accrued income receivable
Accrued expenses payable
Other, net

Net cash provided by operating activities

INVESTING ACTIVITIES

Investment securities available-for-sale:

Maturities and redemptions
Purchases

Investment securities held-to-maturity:

Maturities and redemptions
Purchases

Net change in loans
(Purchases) sales of Federal Home Loan Bank stock
Proceeds from sales of foreclosed property
Net increase in premises and equipment
Other, net

Net cash used in investing activities

FINANCING ACTIVITIES

Net change in:
Deposits
Short-term borrowings
Medium- and long-term debt:
Maturities and redemptions
Issuances
Common stock:
Repurchases
Cash dividends paid
Issuances under employee stock plans

Purchase and retirement of warrants
Excess tax benefits from share-based compensation arrangements
Other, net

Net cash provided by financing activities

Net increase (decrease) in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Interest paid
Income taxes paid
Noncash investing and financing activities:

Loans transferred to other real estate
Loans transferred from portfolio to held-for-sale
Loans transferred from held-for-sale to portfolio
Lease residual transferred to other assets
Securities transferred from available-for-sale to held-to-maturity

See notes to consolidated financial statements.

$
$

F-48

248
(51)
121
6
34
8
(4)
5
(4)
—
(9)

—
(20)
37
(355)
493

1,699
(2,045)

402
—
(136)
(115)
20
(95)
—
(270)

(998)
2

(650)
2,800

(310)
(152)
152
—
9
(5)
848
1,071
6,147
7,218
111
106

21
—
17
—
—

$
$

147
(71)
118
48
38
13
(7)
2
(2)
—
(3)

—
(12)
(35)
105
862

1,757
(4,228)

324
(362)
(644)
—
12
(119)
5
(3,255)

2,529
(93)

(606)
1,016

(240)
(147)
22
(10)
3
(5)
2,469
76
6,071
6,147
94
88

12
28
—
16
—

$
$

593

27
130
123
40
38
13
(34)
—
(4)
(32)
(7)

13
(4)
(14)
(243)
639

1,781
(2,372)

—
—
(3,144)
41
20
(70)
1
(3,743)

4,013
(137)

(1,406)
596

(260)
(137)
49
—
7
(1)
2,724
(380)
6,451
6,071
101
218

16
—
—
—
1,958

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 1 - BASIS OF PRESENTATION AND ACCOUNTING POLICIES

Organization

Comerica Incorporated (the Corporation) is a registered financial holding company headquartered in Dallas, Texas. The 
Corporation’s major business segments are the Business Bank, the Retail Bank and Wealth Management. The Corporation operates 
in three primary geographic markets: Michigan, California and Texas. For further discussion of each business segment and primary 
geographic market, refer to Note 23. The Corporation and its banking subsidiaries are regulated at both the state and federal levels.

The accounting and reporting policies of the Corporation conform to United States (U.S.) generally accepted accounting 
principles (GAAP). The preparation of financial statements in conformity with GAAP requires management to make estimates 
and assumptions that affect reported amounts and disclosures. Actual results could differ from these estimates. Certain items in 
prior periods were reclassified to conform to the current presentation. 

The  following  summarizes  the  significant  accounting  policies  of  the  Corporation  applied  in  the  preparation  of  the 

accompanying consolidated financial statements.

Principles of Consolidation

The consolidated financial statements include the accounts of the Corporation and the accounts of those subsidiaries that 
are majority owned and in which the Corporation has a controlling financial interest. The Corporation consolidates entities not 
determined to be variable interest entities (VIEs) when it holds a controlling financial interest in the entity and uses the cost or 
equity method when it holds less than a controlling financial interest. In consolidation, all significant intercompany accounts and 
transactions are eliminated. The results of operations of companies acquired are included from the date of acquisition. Certain 
amounts in the financial statements for prior years have been reclassified to conform to current financial statement presentation.

The Corporation holds investments in certain legal entities that are considered VIEs. In general, a VIE is an entity that 
either (1) has an insufficient amount of equity to carry out its principal activities without additional subordinated financial support, 
(2) has a group of equity owners that are unable to make significant decisions about its activities, or (3) has a group of equity 
owners that do not have the obligation to absorb losses or the right to receive returns generated by its operations. If any of these 
characteristics are present, the entity is subject to a variable interests consolidation model, and consolidation is based on variable 
interests, not on voting interests. Variable interests are defined as contractual ownership or other money interests in an entity that 
change with fluctuations in the entity’s net asset value. The primary beneficiary is required to consolidate the VIE. The primary 
beneficiary is defined as the party that has both the power to direct the activities of the VIE that most significantly impact the 
entity’s economic performance and the obligation to absorb losses or the right to receive benefits that could be significant to the 
VIE. The maximum potential exposure to losses relative to investments in VIEs is generally limited to the sum of the outstanding 
book basis and unfunded commitments for future investments. 

The Corporation evaluates its investments in VIEs, both at inception and when there is a change in circumstances that 
requires reconsideration, to determine if the Corporation is the primary beneficiary and consolidation is required. The Corporation 
accounts for unconsolidated VIEs using either the proportional, cost or equity method. These investments comprise investments 
in community development projects which generate tax credits to their investors and are included in "accrued income and other 
assets" on the consolidated balance sheets. 

The proportional method is used for investments in affordable housing projects that qualify for the low-income housing 
tax credit (LIHTC). The equity method is used for other investments where the Corporation has the ability to exercise significant 
influence over the entity’s operation and financial policies. Other unconsolidated equity investments that do not meet the criteria 
to be accounted for under the equity method are accounted for under the cost method. Amortization and other write-downs of 
LIHTC investments are presented on a net basis as a component of the "provision for income taxes," while income, amortization 
and write-downs from cost and equity method investments are recorded in “other noninterest income” on the consolidated statements 
of income.

Assets held in an agency or fiduciary capacity are not assets of the Corporation and are not included in the consolidated 

financial statements.

See Note 9 for additional information about the Corporation’s involvement with VIEs.

F-49

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Fair Value Measurements

The Corporation utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to 
determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. In 
cases where quoted market values in an active market are not available, the Corporation uses present value techniques and other 
valuation methods to estimate the fair values of its financial instruments. These valuation methods require considerable judgment 
and the resulting estimates of fair value can be significantly affected by the assumptions made and methods used.

Fair value is an estimate of the exchange price that would be received to sell an asset or paid to transfer a liability in an 
orderly  transaction  (i.e.,  not  a  forced  transaction,  such  as  a  liquidation  or  distressed  sale)  between  market  participants  at  the 
measurement date. Fair value is based on the assumptions market participants would use when pricing an asset or liability. 

Trading securities, investment securities available-for-sale, derivatives and deferred compensation plan liabilities are 
recorded at fair value on a recurring basis. Additionally, from time to time, the Corporation may be required to record other assets 
and  liabilities  at  fair  value  on  a  nonrecurring  basis,  such  as  impaired  loans,  other  real  estate  (primarily  foreclosed  property), 
nonmarketable equity securities and certain other assets and liabilities. These nonrecurring fair value adjustments typically involve 
write-downs of individual assets or application of lower of cost or fair value accounting.

Fair value measurements and disclosures guidance establishes a three-level fair value hierarchy based on the markets in 
which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value. The fair value hierarchy 
gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data. Fair value measurements 
are separately disclosed by level within the fair value hierarchy. For assets and liabilities recorded at fair value, it is the Corporation’s 
policy  to  maximize  the  use  of  observable  inputs  and  minimize  the  use  of  unobservable  inputs  when  developing  fair  value 
measurements.

Level 1

Valuation is based upon quoted prices for identical instruments traded in active markets.

Level 2

Level 3

Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical 
or similar instruments in markets that are not active, and model-based valuation techniques for which all 
significant assumptions are observable in the market.

Valuation  is  generated  from  model-based  techniques  that  use  at  least  one  significant  assumption  not 
observable in the market. These unobservable assumptions reflect estimates of assumptions that market 
participants would use in pricing the asset or liability. Valuation techniques include use of option pricing 
models, discounted cash flow models and similar techniques.

The  Corporation  generally  utilizes  third-party  pricing  services  to  value  Level  1  and  Level  2  trading  and  investment 
securities, as well as certain derivatives designated as fair value hedges. Management reviews the methodologies and assumptions 
used by the third-party pricing services and evaluates the values provided, principally by comparison with other available market 
quotes for similar instruments and/or analysis based on internal models using available third-party market data. The Corporation 
may occasionally adjust certain values provided by the third-party pricing service when management believes, as the result of its 
review, that the adjusted price most appropriately reflects the fair value of the particular security.

Fair value measurements for assets and liabilities where limited or no observable market data exists are based primarily 
upon estimates, often calculated based on the economic and competitive environment, the characteristics of the asset or liability 
and other factors. Therefore, the results cannot be determined with precision and may not be realized in an actual sale or immediate 
settlement of the asset or liability. Additionally, there may be inherent weaknesses in any calculation technique, and changes in 
the underlying assumptions used, including discount rates and estimates of future cash flows, could significantly affect the results 
of current or future values.

Following are descriptions of the valuation methodologies and key inputs used to measure financial assets and liabilities 
recorded at fair value, as well as a description of the methods and significant assumptions used to estimate fair value disclosures 
for financial instruments not recorded at fair value in their entirety on a recurring basis. The descriptions include an indication of 
the level of the fair value hierarchy in which the assets or liabilities are classified. Transfers of assets or liabilities between levels 
of the fair value hierarchy are recognized at the beginning of the reporting period, when applicable.

Cash and due from banks, federal funds sold and interest-bearing deposits with banks
Due to their short-term nature, the carrying amount of these instruments approximates the estimated fair value. As such, the 
Corporation classifies the estimated fair value of these instruments as Level 1.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Trading securities and associated deferred compensation plan liabilities
Trading securities include securities held for trading purposes as well as assets held related to employee deferred compensation 
plans. Trading securities and associated deferred compensation plan liabilities are recorded at fair value on a recurring basis 
and included in “other short-term investments” and “accrued expenses and other liabilities,” respectively, on the consolidated 
balance sheets. Level 1 trading securities include assets related to employee deferred compensation plans, which are invested 
in mutual funds, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and other 
securities traded on an active exchange, such as the New York Stock Exchange. Deferred compensation plan liabilities represent 
the fair value of the obligation to the employee, which corresponds to the fair value of the invested assets. Level 2 trading 
securities include municipal bonds and residential mortgage-backed securities issued by U.S. government-sponsored entities 
and corporate debt securities. The methods used to value trading securities are the same as the methods used to value investment 
securities, discussed below.

Investment securities
Investment securities available-for-sale are recorded at fair value on a recurring basis. The Corporation discloses estimated 
fair values of investment securities held-to-maturity, which is determined in the same manner as investment securities available-
for-sale. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, U.S. Treasury 
securities that are traded by dealers or brokers in active over-the-counter markets and money market funds. Level 2 securities 
include residential mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored entities 
and corporate debt securities. The fair value of Level 2 securities is determined using quoted prices of securities with similar 
characteristics, or pricing models based on observable market data inputs, primarily interest rates, spreads and prepayment 
information.

Securities classified as Level 3 represent securities in less liquid markets requiring significant management assumptions when 
determining  fair  value. Auction-rate  securities  comprise  Level  3  investment  securities  available-for-sale.  The  Corporate 
Development  Department,  with  appropriate  oversight  and  approval  provided  by  senior  management,  is  responsible  for 
determining  the  valuation  methodology  for  auction-rate  securities  and  for  updating  significant  inputs.  Valuation  results, 
including an analysis of changes to the valuation methodology and significant inputs, are provided to senior management for 
review on a quarterly basis.

Loans held-for-sale
Loans held-for-sale, included in “other short-term investments” on the consolidated balance sheets, are recorded at the lower 
of cost or fair value. Loans held-for-sale may be carried at fair value on a nonrecurring basis when fair value is less than cost. 
The fair value is based on what secondary markets are currently offering for portfolios with similar characteristics. As such, 
the Corporation classifies both loans held-for-sale subjected to nonrecurring fair value adjustments and the estimated fair 
value of loans held-for sale as Level 2.

Loans
The Corporation does not record loans at fair value on a recurring basis. However, the Corporation may establish a specific 
allowance for an impaired loan based on the fair value of the underlying collateral. Such loan values are reported as nonrecurring 
fair value measurements. Collateral values supporting individually evaluated impaired loans are evaluated quarterly. When 
management determines that the fair value of the collateral requires additional adjustments, either as a result of non-current 
appraisal value or when there is no observable market price, the Corporation classifies the impaired loan as Level 3. The 
Special Assets Group is responsible for performing quarterly credit quality reviews for all impaired loans as part of the quarterly 
allowance for loan losses process overseen by the Chief Credit Officer, during which valuation adjustments to updated collateral 
values are determined.

The Corporation discloses fair value estimates for loans. The estimated fair value is determined based on characteristics such 
as loan category, repricing features and remaining maturity, and includes prepayment and credit loss estimates. For variable 
rate business loans that reprice frequently, the estimated fair value is based on carrying values adjusted for estimated credit 
losses inherent in the portfolio at the balance sheet date. For other business loans and retail loans, fair values are estimated 
using a discounted cash flow model that employs a discount rate that reflects the Corporation's current pricing for loans with 
similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at 
the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, 
when applicable. The Corporation classifies the estimated fair value of loans held for investment as Level 3.

Customers’ liability on acceptances outstanding and acceptances outstanding
Customers' liability on acceptances outstanding is included in "accrued income and other assets" and acceptances outstanding 
are included in "accrued expenses and other liabilities" on the consolidated balance sheets. Due to their short-term nature, the 

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

carrying amount of these instruments approximates the estimated fair value. As such, the Corporation classifies the estimated 
fair value of these instruments as Level 1.

Derivative assets and derivative liabilities
Derivative  instruments  held  or  issued  for  risk  management  or  customer-initiated  activities  are  traded  in  over-the-counter 
markets where quoted market prices are not readily available. Fair value for over-the-counter derivative instruments is measured 
on a recurring basis using internally developed models that use primarily market observable inputs, such as yield curves and 
option volatilities. The Corporation manages credit risk on its derivative positions based on whether the derivatives are being 
settled through a clearinghouse or bilaterally with each counterparty. For derivative positions settled on a counterparty-by-
counterparty basis, the Corporation calculates credit valuation adjustments, included in the fair value of these instruments, on 
the basis of its relationships at the counterparty portfolio/master netting agreement level. These credit valuation adjustments 
are determined by applying a credit spread for the counterparty or the Corporation, as appropriate, to the total expected exposure 
of the derivative after considering collateral and other master netting arrangements. These adjustments, which are considered 
Level 3 inputs, are based on estimates of current credit spreads to evaluate the likelihood of default. When credit valuation 
adjustments are significant to the overall fair value of a derivative, the Corporation classifies the over-the-counter derivative 
valuation in Level 3 of the fair value hierarchy; otherwise, over-the-counter derivative valuations are classified in Level 2.

Warrants which contain a net exercise provision or a non-contingent put right embedded in the warrant agreement are accounted 
for as derivatives and recorded at fair value on a recurring basis using a Black-Scholes valuation model. The Black-Scholes 
valuation model utilizes five inputs: risk-free rate, expected life, volatility, exercise price, and the per share market value of 
the underlying company. The Corporation holds a portfolio of warrants for generally nonmarketable equity securities with a 
fair value of $3 million at December 31, 2016, included in "accrued income and other assets" on the consolidated balance 
sheets. These warrants are primarily from non-public technology companies obtained as part of the loan origination process. 
The  Corporate  Development  Department  is  responsible  for  the  warrant  valuation  process,  which  includes  reviewing  all 
significant inputs for reasonableness, and for providing valuation results to senior management. Increases in any of these 
inputs in isolation, with the exception of exercise price, would result in a higher fair value. Increases in exercise price in 
isolation would result in a lower fair value. The Corporation classifies warrants accounted for as derivatives as Level 3.

Nonmarketable equity securities
The Corporation has a portfolio of indirect (through funds) private equity and venture capital investments with a carrying 
value and unfunded commitments of $11 million and $2 million, respectively, at December 31, 2016. These funds generally 
cannot be redeemed and the majority is not readily marketable. Distributions from these funds are received by the Corporation 
as a result of the liquidation of underlying investments of the funds and/or as income distributions. It is estimated that the 
underlying assets of the funds will be liquidated over a period of up to 8 years. Recently issued federal regulations may require 
the Corporation to sell certain of these funds prior to liquidation. The investments are accounted for either on the cost or equity 
method and are individually reviewed for impairment on a quarterly basis by comparing the carrying value to the estimated 
fair value. These investments may be carried at fair value on a nonrecurring basis when they are deemed to be impaired and 
written down to fair value. Where there is not a readily determinable fair value, the Corporation estimates fair value for indirect 
private equity and venture capital investments based on the net asset value, as reported by the fund. On a quarterly basis, the 
Corporate Development Department is responsible, with appropriate oversight and approval provided by senior management, 
for performing the valuation procedures and updating significant inputs, as are primarily provided by the underlying fund's 
management. 

The Corporation also holds restricted equity investments, primarily Federal Home Loan Bank (FHLB) and Federal Reserve 
Bank (FRB) stock. Restricted equity securities are not readily marketable and are recorded at cost (par value) in "accrued 
income and other assets" on the consolidated balance sheets and evaluated for impairment based on the ultimate recoverability 
of the par value. No significant observable market data for these instruments is available. The Corporation considers the 
profitability  and  asset  quality  of  the  issuer,  dividend  payment  history  and  recent  redemption  experience  and  believes  its 
investments in FHLB and FRB stock are ultimately recoverable at par. Therefore, the carrying amount for these restricted 
equity investments approximates fair value. The Corporation classifies the estimated fair value of such investments as Level 
1.  The  Corporation’s  investment  in  FHLB  stock  totaled  $122  million  and  $7  million  at  December 31,  2016  and  2015, 
respectively, and its investment in FRB stock totaled $85 million at both December 31, 2016 and 2015. 

Other real estate
Other real estate is included in “accrued income and other assets” on the consolidated balance sheets and includes primarily 
foreclosed property. Foreclosed property is initially recorded at fair value, less costs to sell, at the date of legal title transfer 
to the Corporation, establishing a new cost basis. Subsequently, foreclosed property is carried at the lower of cost or fair value, 
less costs to sell. Other real estate may be carried at fair value on a nonrecurring basis when fair value is less than cost. Fair 
value is based upon independent market prices, appraised value or management's estimate of the value of the property. The 

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Special Assets Group obtains updated independent market prices and appraised values, as required by state regulation or 
deemed necessary based on market conditions, and determines if additional write-downs are necessary. On a quarterly basis, 
senior management reviews all other real estate and determines whether the carrying values are reasonable, based on the length 
of time elapsed since receipt of independent market price or appraised value and current market conditions. When management 
determines that the fair value of other real estate requires additional adjustments, either as a result of a non-current appraisal 
or when there is no observable market price, the Corporation classifies the other real estate as Level 3.

Deposit liabilities
The estimated fair value of checking, savings and certain money market deposit accounts is represented by the amounts payable 
on demand. The estimated fair value of term deposits is calculated by discounting the scheduled cash flows using the period-
end rates offered on these instruments. As such, the Corporation classifies the estimated fair value of deposit liabilities as 
Level 2.

Short-term borrowings
The  carrying  amount  of  federal  funds  purchased,  securities  sold  under  agreements  to  repurchase  and  other  short-term 
borrowings approximates the estimated fair value. As such, the Corporation classifies the estimated fair value of short-term 
borrowings as Level 1.

Medium- and long-term debt
The estimated fair value of the Corporation's medium- and long-term debt is based on quoted market values when available. 
If  quoted  market  values  are  not  available,  the  estimated  fair  value  is  based  on  the  market  values  of  debt  with  similar 
characteristics. The Corporation classifies the estimated fair value of medium- and long-term debt as Level 2.

Credit-related financial instruments
Credit-related financial instruments include unused commitments to extend credit and letters of credit. These instruments 
generate ongoing fees which are recognized over the term of the commitment. In situations where credit losses are probable, 
the  Corporation  records  an  allowance. The  carrying  value  of  these  instruments  included  in  "accrued  expenses  and  other 
liabilities" on the consolidated balance sheets, which includes the carrying value of the deferred fees plus the related allowance, 
approximates the estimated fair value. The Corporation classifies the estimated fair value of credit-related financial instruments 
as Level 3.

For further information about fair value measurements refer to Note 2.

Other Short-Term Investments

Other short-term investments include trading securities and loans held-for-sale. 

Trading securities are carried at fair value. Realized and unrealized gains or losses on trading securities are included in 

“other noninterest income” on the consolidated statements of income.

Loans held-for-sale, typically residential mortgages originated with the intent to sell and occasionally may include other 
loans transferred to held-for-sale, are carried at the lower of cost or fair value. Fair value is determined in the aggregate for each 
portfolio. Changes in fair value and gains or losses upon sale are included in “other noninterest income” on the consolidated 
statements of income.

Investment Securities

Securities not held for trading purposes are classified as available-for-sale or held-to-maturity. Debt securities for which 
management has the intent and ability to hold to maturity are classified as held-to-maturity and recorded at amortized cost. Securities 
available-for-sale are recorded at fair value, with unrealized gains and losses, net of income taxes, reported as a separate component 
of other comprehensive income (loss) (OCI).

Securities transferred from available-for-sale to held-to-maturity are reclassified at fair value on the date of transfer. The 
net unrealized gain (loss) at the date of transfer is included in historical cost and amortized over the remaining life of the related 
securities as a yield adjustment consistent with the amortization of the net unrealized gain (loss) included in accumulated other 
comprehensive loss on the same securities, resulting in no impact to net income.

Investment  securities  are  reviewed  quarterly  for  possible  other-than-temporary  impairment  (OTTI).  In  determining 
whether OTTI exists for debt securities in an unrealized loss position, the Corporation assesses the likelihood of selling the security 
prior to the recovery of its amortized cost basis. If the Corporation intends to sell the debt security or it is more likely than not that 
the Corporation will be required to sell the debt security prior to the recovery of its amortized cost basis, the debt security is written 
down to fair value, and the full amount of any impairment charge is recorded as a loss in “net securities gains” in the consolidated 
statements of income. If the Corporation does not intend to sell the debt security and it is more likely than not that the Corporation 
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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

will not be required to sell the debt security prior to recovery of its amortized cost basis, only the credit component of any impairment 
of a debt security is recognized as a loss in “net securities gains” on the consolidated statements of income, with the remaining 
impairment recorded in OCI.

The OTTI review for equity securities includes an analysis of the facts and circumstances of each individual investment 
and  focuses  on  the  severity  of  loss,  the  length  of  time  the  fair  value  has  been  below  cost,  the  expectation  for  that  security’s 
performance, the financial condition and near-term prospects of the issuer, and management’s intent and ability to hold the security 
to recovery. A decline in value of an equity security that is considered to be other-than-temporary is recorded as a loss in “net 
securities (losses) gains” on the consolidated statements of income.

Gains or losses on the sale of securities are computed based on the adjusted cost of the specific security sold.

For further information on investment securities, refer to Note 3.

Loans

Loans and leases originated and held for investment are recorded at the principal balance outstanding, net of unearned 
income, charge-offs and unamortized deferred fees and costs. Interest income is recognized on loans and leases using the interest 
method.

The  Corporation  assesses  all  loan  modifications  to  determine  whether  a  restructuring  constitutes  a  troubled  debt 
restructuring (TDR). A restructuring is considered a TDR when a borrower is experiencing financial difficulty and the Corporation 
grants a concession to the borrower. TDRs on accrual status at the original contractual rate of interest are considered performing.  
Nonperforming  TDRs  include  TDRs  on  nonaccrual  status  and  loans  which  have  been  renegotiated  to  less  than  the  original 
contractual rates (reduced-rate loans). All TDRs are considered impaired loans.

Loan Origination Fees and Costs

Substantially all loan origination fees and costs are deferred and amortized to net interest income over the life of the 
related loan or over the commitment period as a yield adjustment. Net deferred income on originated loans, including unearned 
income and unamortized costs, fees, premiums and discounts, totaled $147 million and $226 million at December 31, 2016 and 
2015, respectively.

Loan fees on unused commitments and net origination fees related to loans sold are recognized in noninterest income.

 Allowance for Credit Losses

The allowance for credit losses includes both the allowance for loan losses and the allowance for credit losses on lending-

related commitments.

The Corporation disaggregates the loan portfolio into segments for purposes of determining the allowance for credit 
losses. These segments are based on the level at which the Corporation develops, documents and applies a systematic methodology 
to determine the allowance for credit losses. The Corporation's portfolio segments are business loans and retail loans. Business 
loans include the commercial, real estate construction, commercial mortgage, lease financing and international loan portfolios.  
Retail loans consist of traditional residential mortgage, home equity and other consumer loans.

For further information on the Allowance for Credit Losses, refer to Note 4.

Allowance for Loan Losses

The  allowance  for  loan  losses  represents  management’s  assessment  of  probable,  estimable  losses  inherent  in  the 
Corporation’s loan portfolio. The allowance for loan losses includes specific allowances, based on individual evaluations of certain 
loans, and allowances for homogeneous pools of loans with similar risk characteristics. 

The Corporation individually evaluates certain impaired loans on a quarterly basis and establishes specific allowances 
for such loans, if required. A loan is considered impaired when it is probable that interest or principal payments will not be made 
in accordance with the contractual terms of the loan agreement. Consistent with this definition, all loans for which the accrual of 
interest has been discontinued (nonaccrual loans) are considered impaired. The Corporation individually evaluates nonaccrual 
loans with book balances of $2 million or more and accruing loans whose terms have been modified in a TDR. The threshold for 
individual evaluation is revised on an infrequent basis, generally when economic circumstances change significantly. Specific 
allowances for impaired loans are estimated using one of several methods, including the estimated fair value of underlying collateral, 
observable  market  value  of  similar  debt  or  discounted  expected  future  cash  flows.  Collateral  values  supporting  individually 
evaluated impaired loans are evaluated quarterly. Either appraisals are obtained or appraisal assumptions are updated at least 
annually unless conditions dictate increased frequency. The Corporation may reduce the collateral value based upon the age of the 
appraisal and adverse developments in market conditions.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Loans which do not meet the criteria to be evaluated individually are evaluated in homogeneous pools of loans with 
similar risk characteristics. Business loans are assigned to pools based on the Corporation's internal risk rating system. Internal 
risk ratings are assigned to each business loan at the time of approval and are subjected to subsequent periodic reviews by the 
Corporation’s senior management, generally at least annually or more frequently upon the occurrence of a circumstance that affects 
the credit risk of the loan. For business loans not individually evaluated, losses inherent to the pool are estimated by applying 
standard reserve factors to outstanding principal balances. Standard reserve factors are based on estimated probabilities of default 
for each internal risk rating, set to a default horizon based on an estimated loss emergence period, and loss given default. These 
factors are evaluated quarterly and updated annually, unless economic conditions necessitate a change, giving consideration to 
count-based borrower risk rating migration experience and trends, recent charge-off experience, current economic conditions and 
trends, changes in collateral values of properties securing loans, and trends with respect to past due and nonaccrual amounts. 

The allowance for business loans not individually evaluated also includes qualitative adjustments to bring the allowance 
to the level management believes is appropriate based on factors that have not otherwise been fully accounted for, including 
adjustments for (i) risk factors that have not been fully addressed in internal risk ratings, (ii) imprecision in the risk rating system 
resulting from inaccuracy in assigning and/or entering risk ratings in the loan accounting system, (iii) market conditions and (iv) 
model imprecision. Risk factors that have not been fully addressed in internal risk ratings may include portfolios where recent 
historical losses exceed expected losses or known recent events are expected to alter risk ratings once evidence is acquired, portfolios 
where a certain level of concentration introduces added risk, or changes in the level and quality of experience held by lending 
management. An additional allowance for risk rating errors is calculated based on the results of risk rating accuracy assessments 
performed on samples of business loans conducted by the Corporation's asset quality review function, a function independent of 
the lending and credit groups responsible for assigning the initial internal risk rating at the time of approval. Qualitative adjustments 
for market conditions are determined based on an established framework. The determination of the appropriate adjustment is based 
on  management's  analysis  of  observable  macroeconomic  metrics,  including  consideration  of  regional  metrics  within  the 
Corporation's  footprint,  internal  credit  risk  movement  and  a  qualitative  assessment  of  the  lending  environment,  including 
underwriting standards, current economic and political conditions, and other factors affecting credit quality. Management recognizes 
the sensitivity of various assumptions made in the quantitative modeling of expected losses and may adjust reserves depending 
upon the level of uncertainty that currently exists in one or more assumption. 

The allowance for retail loans not individually evaluated is determined by applying estimated loss rates to various pools 
of loans within the portfolios with similar risk characteristics. Estimated loss rates for all pools are updated quarterly, incorporating 
quantitative  and  qualitative  factors  such  as  recent  charge-off  experience,  current  economic  conditions  and  trends,  changes  in 
collateral values of properties securing loans (using index-based estimates), and trends with respect to past due and nonaccrual 
amounts.

Loans acquired in business combinations are initially recorded at fair value, which includes an estimate of credit losses 
expected to be realized over the remaining lives of the loans, and therefore no corresponding allowance for loan losses is recorded 
for these loans at acquisition. Methods utilized to estimate any subsequently required allowance for loan losses for acquired loans 
not deemed credit-impaired at acquisition are similar to originated loans; however, the estimate of loss is based on the unpaid 
principal balance less any remaining purchase discount.

The total allowance for loan losses is sufficient to absorb incurred losses inherent in the total portfolio. Unanticipated 
economic events, including political, economic and regulatory instability in countries where the Corporation has loans, could cause 
changes in the credit characteristics of the portfolio and result in an unanticipated increase in the allowance. Significant increases 
in current portfolio exposures, as well as the inclusion of additional industry-specific portfolio exposures in the allowance, could 
also increase the amount of the allowance. Any of these events, or some combination thereof, may result in the need for additional 
provision for credit losses in order to maintain an allowance that complies with credit risk and accounting policies.

Loans deemed uncollectible are charged off and deducted from the allowance. Recoveries on loans previously charged 

off are added to the allowance.

 Allowance for Credit Losses on Lending-Related Commitments

The allowance for credit losses on lending-related commitments provides for probable losses inherent in lending-related 
commitments, including unused commitments to extend credit and letters of credit. The allowance for credit losses on lending-
related commitments includes allowances based on homogeneous pools of letters of credit and unused commitments to extend 
credit within each internal risk rating. A probability of draw estimate is applied to the commitment amount, and the result is 
multiplied by standard reserve factors consistent with business loans. In general, the probability of draw for letters of credit is 
considered certain for all letters of credit supporting loans and for letters of credit assigned an internal risk rating generally consistent 
with regulatory defined substandard or doubtful. Other letters of credit and all unfunded commitments have a lower probability 
of draw. The allowance for credit losses on lending-related commitments is included in “accrued expenses and other liabilities” 

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

on the consolidated balance sheets, with the corresponding charge reflected in the “provision for credit losses” on the consolidated 
statements of income.

Nonperforming Assets

Nonperforming assets consist of nonaccrual loans, reduced-rate loans and foreclosed property.

A loan is considered past due when the contractually required principal or interest payment is not received by the specified 
due date or, for certain loans, when a scheduled monthly payment is past due and unpaid for 30 days or more. Business loans are 
generally placed on nonaccrual status when management determines full collection of principal or interest is unlikely or when 
principal or interest payments are 90 days past due, unless the loan is fully collateralized and in the process of collection. The past-
due status of a business loan is one of many indicative factors considered in determining the collectibility of the credit. The primary 
driver of when the principal amount of a business loan should be fully or partially charged-off is based on a qualitative assessment 
of the recoverability of the principal amount from collateral and other cash flow sources. Residential mortgage and home equity 
loans are generally placed on nonaccrual status once they become 90 days past due and are charged off to current appraised values 
less costs to sell no later than 180 days past due. In addition, junior lien home equity loans less than 90 days past due are placed 
on nonaccrual status if they have underlying risk characteristics that place full collection of the loan in doubt, such as when the 
related senior lien position is identified as seriously delinquent. Residential mortgage and consumer loans in bankruptcy for which 
the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt are placed on nonaccrual status 
and written down to estimated collateral value, without regard to the actual payment status of the loan, and are classified as TDRs. 
All other consumer loans are generally placed on nonaccrual status at 90 days past due and are charged off at no later than 120 
days past due, earlier if deemed uncollectible. 

At the time a loan is placed on nonaccrual status, interest previously accrued but not collected is charged against current 
income. Principal and interest payments received on such loans are generally first applied as a reduction of principal. Income on 
nonaccrual loans is then recognized only to the extent that cash is received after principal has been fully repaid or future collection 
of principal is probable. Generally, a loan may be returned to accrual status when all delinquent principal and interest have been 
received and the Corporation expects repayment of the remaining contractual principal and interest, or when the loan or debt 
security is both well secured and in the process of collection.

Foreclosed property (primarily real estate) is initially recorded at fair value, less costs to sell, at the date of legal title 
transfer to the Corporation and subsequently carried at the lower of cost or fair value, less estimated costs to sell. Loans are 
reclassified to foreclosed property upon obtaining legal title to the collateral. Independent appraisals are obtained to substantiate 
the fair value of foreclosed property at the time of foreclosure and updated at least annually or upon evidence of deterioration in 
the property’s value. At the time of foreclosure, the adjustment for the difference between the related loan balance and fair value 
(less estimated costs to sell) of the property acquired is charged or credited to the allowance for loan losses. Subsequent write-
downs, operating expenses and losses upon sale, if any, are charged to noninterest expenses. Foreclosed property is included in 
“accrued income and other assets” on the consolidated balance sheets.

Premises and Equipment

Premises and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation, computed on 
the straight-line method, is charged to operations over the estimated useful lives of the assets. Estimated useful lives are generally 
3  years  to  33  years  for  premises  that  the  Corporation  owns  and  3  years  to  8  years  for  furniture  and  equipment.  Leasehold 
improvements are generally amortized over the terms of their respective leases or 10 years, whichever is shorter.

Software

Capitalized software is stated at cost, less accumulated amortization. Capitalized software includes purchased software, 
capitalizable application development costs associated with internally-developed software and cloud computing arrangements, 
including an in-substance software license. Amortization, computed on the straight-line method, is charged to operations over the 
estimated useful life of the software, generally 5 years. Capitalized software is included in “accrued income and other assets” on 
the consolidated balance sheets.

Goodwill and Core Deposit Intangibles

Goodwill, included in "accrued income and other assets" on the consolidated balance sheets, is initially recorded as the 
excess of the purchase price over the fair value of net assets acquired in a business combination and is subsequently evaluated at 
least  annually  for  impairment.  Goodwill  impairment  testing  is  performed  at  the  reporting  unit  level,  equivalent  to  a  business 
segment or one level below. The Corporation has three reporting units: the Business Bank, the Retail Bank and Wealth Management.

The Corporation performs its annual evaluation of goodwill impairment in the third quarter of each year and on an interim 

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

basis if events or changes in circumstances between annual tests suggest additional testing may be warranted to determine if 
goodwill might be impaired. The goodwill impairment test is a two-step test. The first step of the goodwill impairment test compares 
the estimated fair value of identified reporting units with their carrying amount, including goodwill. If the estimated fair value of 
the reporting unit is less than the carrying value, the second step must be performed to determine the implied fair value of the 
reporting unit's goodwill and the amount of goodwill impairment, if any. The implied fair value of goodwill is determined as if 
the reporting unit were being acquired in a business combination. If the implied fair value of goodwill exceeds the goodwill assigned 
to the reporting unit, there is no impairment. If the goodwill assigned to a reporting unit exceeds the implied fair value of goodwill, 
an impairment charge would be recorded for the excess.

In performing the annual impairment test, the carrying value of each reporting unit is the greater of economic or regulatory 
capital. The Corporation assigns economic capital using internal management methodologies on the basis of each reporting unit's 
credit, operational and interest rate risks, as well as goodwill. To determine regulatory capital, each reporting unit is assigned 
sufficient capital such that their respective Tier 1 ratio, based on allocated risk-weighted assets, is the same as that of the Corporation.  
Using this two-pronged approach, the Corporation's equity is fully allocated to its reporting units except for capital held primarily 
for the risk associated with the securities portfolio which is assigned to the Finance segment of the Corporation. 

Determining the fair value of reporting units is a subjective process involving the use of estimates and judgments related 
to the selection of inputs such as future cash flows, discount rates, comparable public company multiples, applicable control 
premiums and economic expectations used in determining the interest rate environment. The estimated fair values of the reporting 
units are determined using a blend of two commonly used valuation techniques: the market approach and the income approach. 
For  the  market  approach,  valuations  of  reporting  units  consider  a  combination  of  earnings,  equity  and  other  multiples  from 
companies  with  characteristics  similar  to  the  reporting  unit.  Since  the  fair  values  determined  under  the  market  approach  are 
representative of noncontrolling interests, the valuations accordingly incorporate a control premium. For the income approach, 
estimated future cash flows and terminal value are discounted. Estimated future cash flows are derived from internal forecasts and 
economic  expectations  for  each  reporting  unit  which  incorporate  uncertainty  factors  inherent  to  long-term  projections.  The 
applicable discount rate is based on the imputed cost of equity capital appropriate for each reporting unit, which incorporates the 
risk-free rate of return, the level of non-diversified risk associated with companies with characteristics similar to the reporting 
unit, a size risk premium and a market equity risk premium.

The Corporation may choose to perform a qualitative assessment to determine whether the first step of the impairment 
test should be performed in future periods if certain factors indicate that impairment is unlikely. Factors which could be considered 
in the assessment of the likelihood of impairment include macroeconomic conditions, industry and market considerations, stock 
performance of the Corporation and its peers, financial performance, events affecting the Corporation as a whole or its reporting 
units individually and previous results of goodwill impairment tests.

Core deposit intangibles are amortized on an accelerated basis, based on the estimated period the economic benefits are 
expected to be received. Core deposit intangibles are reviewed for impairment when events or changes in circumstances indicate 
that their carrying amounts may not be recoverable. Impairment for a finite-lived intangible asset exists if the sum of the undiscounted 
cash flows expected to result from the use of the asset exceeds its carrying value.

Additional information regarding goodwill and core deposit intangibles can be found in Note 7.

Nonmarketable Equity Securities

The  Corporation  has  certain  investments  that  are  not  readily  marketable.  These  investments  include  a  portfolio  of 
investments  in  indirect  private  equity  and  venture  capital  funds  and  restricted  equity  investments,  which  are  securities  the 
Corporation is required to hold for various reasons, primarily Federal Home Loan Bank of Dallas (FHLB) and Federal Reserve 
Bank (FRB) stock. These investments are accounted for on the cost or equity method and are included in “accrued income and 
other assets” on the consolidated balance sheets. The investments are individually reviewed for impairment on a quarterly basis. 
Indirect private equity and venture capital funds are evaluated by comparing the carrying value to the estimated fair value. The 
amount by which the carrying value exceeds the fair value that is determined to be other-than-temporary impairment is charged 
to current earnings and the carrying value of the investment is written down accordingly. FHLB and FRB stock are recorded at 
cost (par value) and evaluated for impairment based on the ultimate recoverability of the par value. If the Corporation does not 
expect to recover the full par value, the amount by which the par value exceeds the ultimately recoverable value would be charged 
to current earnings and the carrying value of the investment would be written down accordingly.

Derivative Instruments and Hedging Activities

Derivative instruments are carried at fair value in either “accrued income and other assets” or “accrued expenses and 
other liabilities” on the consolidated balance sheets. The accounting for changes in the fair value (i.e., gains or losses) of a derivative 
instrument is determined by whether it has been designated and qualifies as part of a hedging relationship and, further, by the type 
F-57

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

of hedging relationship. The Corporation presents derivative instruments at fair value in the consolidated balance sheets on a net 
basis when a right of offset exists, based on transactions with a single counterparty and any cash collateral paid to and/or received 
from that counterparty for derivative contracts that are subject to legally enforceable master netting arrangements. For derivative 
instruments designated and qualifying as fair value hedges (i.e., hedging the exposure to changes in the fair value of an asset or a 
liability or an identified portion thereof that is attributable to a particular risk), the gain or loss on the derivative instrument, as 
well as the offsetting loss or gain on the hedged item attributable to the hedged risk, are recognized in current earnings during the 
period of the change in fair values. For derivative instruments that are designated and qualify as cash flow hedges (i.e., hedging 
the exposure to variability in expected future cash flows that is attributable to a particular risk), the effective portion of the gain 
or loss on the derivative instrument is reported as a component of other comprehensive income and reclassified into earnings in 
the same period or periods during which the hedged transaction affects earnings. The remaining gain or loss on the derivative 
instrument in excess of the cumulative change in the present value of future cash flows of the hedged item (i.e., the ineffective 
portion), if any, is recognized in current earnings during the period of change. For derivative instruments not designated as hedging 
instruments, the gain or loss is recognized in current earnings during the period of change. 

To qualify for the use of hedge accounting, a derivative must be effective at inception and expected to be continuously 
effective in offsetting the risk being hedged. For derivatives designated as hedging instruments at inception, the Corporation uses 
either the short-cut method or applies statistical regression analysis to assess effectiveness. The short-cut method is used for $400 
million notional of fair value hedges of medium and long-term debt issued prior to 2006. This method allows for the assumption 
of zero hedge ineffectiveness and eliminates the requirement to further assess hedge effectiveness on these transactions. For hedge 
relationships to which the Corporation does not apply the short-cut method, statistical regression analysis is used at inception and 
for each reporting period thereafter to assess whether the derivative used has been and is expected to be highly effective in offsetting 
changes in the fair value or cash flows of the hedged item. All components of each derivative instrument’s gain or loss are included 
in the assessment of hedge effectiveness. Net hedge ineffectiveness is recorded in “other noninterest income” on the consolidated 
statements of income.

Further information on the Corporation’s derivative instruments and hedging activities is included in Note 8.

Short-Term Borrowings

Securities sold under agreements to repurchase are treated as collateralized borrowings and are recorded at amounts equal 
to the cash received. The contractual terms of the agreements to repurchase may require the Corporation to provide additional 
collateral if the fair value of the securities underlying the borrowings declines during the term of the agreement.

Financial Guarantees

Certain guarantee contracts or indemnification agreements that contingently require the Corporation, as guarantor, to 
make payments to the guaranteed party are initially measured at fair value and included in “accrued expenses and other liabilities” 
on the consolidated balance sheets. The subsequent accounting for the liability depends on the nature of the underlying guarantee. 
The release from risk is accounted for under a particular guarantee when the guarantee expires or is settled, or by a systematic and 
rational amortization method. 

Further information on the Corporation’s obligations under guarantees is included in Note 8.

Share-Based Compensation

The Corporation recognizes share-based compensation expense using the straight-line method over the requisite service 
period for all stock awards, including those with graded vesting. The requisite service period is the period an employee is required 
to provide service in order to vest in the award, which cannot extend beyond the date at which the employee is no longer required 
to perform any service to receive the share-based compensation (the retirement-eligible date). Certain awards are contingent upon 
performance and/or market conditions, which affect the number of shares ultimately issued. The Corporation periodically evaluates 
the probable outcome of the performance conditions and makes cumulative adjustments to compensation expense as appropriate. 
Market conditions are included in the determination of the fair value of the award on the date of grant. Subsequent to the grant 
date, market conditions have no impact on the amount of compensation expense the Corporation will recognize over the life of 
the award.

Further information on the Corporation’s share-based compensation plans is included in Note 16.

Revenue Recognition

The following summarizes the Corporation’s revenue recognition policies as they relate to certain noninterest income 

line items in the consolidated statements of income.

F-58

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Card fees includes primarily bankcard interchange revenue which is recorded as revenue when earned. Effective January 
1, 2015, the Corporation entered into a new contract for an existing debit card program. Guidance provided in Accounting Standards 
Code  605-45,  "Principal Agent  Considerations,"  indicates  whether  revenue  should  be  reported  gross  or  net  for  this  type  of 
arrangement. Management assessed various principal versus agent indicators provided in the guidance and concluded that the 
Corporation bears the risks and rewards of providing the services for the card program based on the new contract terms and, 
therefore, gross presentation of revenues and expenses is appropriate. This change in presentation resulted in increases of $177 
million to both "card fees" in noninterest income and "outside processing fee expense" in noninterest expenses for the year ended 
December 31, 2015.

Service charges on deposit accounts include fees for banking services provided, overdrafts and non-sufficient funds. 
Revenue  is  generally  recognized  in  accordance  with  published  deposit  account  agreements  for  retail  accounts  or  contractual 
agreements for commercial accounts.

Fiduciary income includes fees and commissions from asset management, custody, recordkeeping, investment advisory 
and other services provided to personal and institutional trust customers. Revenue is recognized on an accrual basis at the time 
the services are performed and are based on either the market value of the assets managed or the services provided.

Commercial lending fees primarily include fees assessed on the unused portion of commercial lines of credit ("unused 
commitment fees") and syndication agent fees. Unused commitment fees are recognized when earned. Syndication agent fees are 
generally recognized when the transaction is complete.

Defined Benefit Pension and Other Postretirement Costs

Defined benefit pension costs are included in “salaries and benefits expense" on the consolidated statements of income 
and are funded consistent with the requirements of federal laws and regulations. Inherent in the determination of defined benefit 
pension costs are assumptions concerning future events that will affect the amount and timing of required benefit payments under 
the plans. These assumptions include demographic assumptions such as retirement age and mortality, a compensation rate increase, 
a discount rate used to determine the current benefit obligation and a long-term expected rate of return on plan assets. The Corporation 
updated these assumptions to reflect modifications made to the plans during the fourth quarter (see Note 17 to the consolidated 
financial statements) and to include a form of payment election assumption. Net periodic defined benefit pension expense includes 
service cost, interest cost based on the assumed discount rate, an expected return on plan assets based on an actuarially derived 
market-related value of assets, amortization of prior service cost or credit and amortization of net actuarial gains or losses. The 
market-related value of plan assets is determined by amortizing the current year’s investment gains and losses (the actual investment 
return net of the expected investment return) over 5 years. The amortization adjustment cannot exceed 10 percent of the fair value 
of assets. Prior service costs or credits include the impact of plan amendments on the liabilities and are amortized over the future 
service periods of active employees expected to receive benefits under the plan. Actuarial gains and losses result from experience 
different from that assumed and from changes in assumptions (excluding asset gains and losses not yet reflected in market-related 
value). Amortization of actuarial gains and losses is included as a component of net periodic defined benefit pension cost for a 
year if the actuarial net gain or loss exceeds 10 percent of the greater of the projected benefit obligation or the market-related value 
of plan assets. If amortization is required, the excess is amortized over the average remaining service period of participating 
employees expected to receive benefits under the plan.

Postretirement benefits are recognized in “salaries and benefits expense" on the consolidated statements of income during 
the average remaining service period of participating employees expected to receive benefits under the plan or the average remaining 
future lifetime of retired participants currently receiving benefits under the plan.

See Note 17 for further information regarding the Corporation’s defined benefit pension and other postretirement plans.

Income Taxes

The provision for income taxes is the sum of income taxes due for the current year and deferred taxes. Deferred taxes 
arise from temporary differences between the income tax basis and financial accounting basis of assets and liabilities. Deferred 
tax assets are evaluated for realization based on available evidence of loss carry-back capacity, future reversals of existing taxable 
temporary differences, and assumptions made regarding future events. A valuation allowance is provided when it is more likely 
than not that some portion of the deferred tax asset will not be realized. 

The Corporation classifies interest and penalties on income tax liabilities in the “provision for income taxes” on the 

consolidated statements of income.

F-59

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Earnings Per Share

Basic net income per common share is calculated using the two-class method. The two-class method is an earnings 
allocation formula that determines earnings per share for each share of common stock and participating securities according to 
dividends declared (distributed earnings) and participation rights in undistributed earnings. Distributed and undistributed earnings 
are  allocated  between  common  and  participating  security  shareholders  based  on  their  respective  rights  to  receive  dividends. 
Nonvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents are considered 
participating securities (e.g., nonvested restricted stock and service-based restricted stock units). Undistributed net losses are not 
allocated to nonvested restricted shareholders, as these shareholders do not have a contractual obligation to fund the losses incurred 
by the Corporation. Net income attributable to common shares is then divided by the weighted-average number of common shares 
outstanding during the period.

Diluted net income per common share is calculated using the more dilutive of either the treasury method or the two-class 
method. The dilutive calculation considers common stock issuable under the assumed exercise of stock options and performance-
based restricted stock units granted under the Corporation’s stock plans and warrants using the treasury stock method, if dilutive. 
Net income attributable to common shares is then divided by the total of weighted-average number of common shares and common 
stock equivalents outstanding during the period.

Statements of Cash Flows

Cash and cash equivalents are defined as those amounts included in “cash and due from banks”, “federal funds sold” and 

“interest-bearing deposits with banks” on the consolidated balance sheets. 

Comprehensive Income (Loss)

The Corporation presents on an annual basis the components of net income and other comprehensive income in two 
separate, but consecutive statements and presents on an interim basis the components of net income and a total for comprehensive 
income in one continuous consolidated statement of comprehensive income. 

Pending Accounting Pronouncements 

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, 
“Revenue from Contracts with Customers (Topic 606),” (ASU 2014-09), which is intended to improve and converge the financial 
reporting requirements for revenue contracts with customers. Previous GAAP comprised broad revenue recognition concepts along 
with numerous industry-specific requirements. The new guidance establishes a five-step model which entities must follow to 
recognize revenue and removes inconsistencies and weaknesses in existing guidance. The guidance under ASU 2014-09 is effective 
for annual and interim periods beginning after December 15, 2017, and must be retrospectively applied. The Corporation expects 
to adopt ASU 2014-09 in the first quarter 2018 using the modified retrospective approach, which includes presenting the cumulative 
effect of initial application along with supplementary disclosures. Under current guidance, recognition is deferred for compensation 
that is not considered to be fixed and determinable. Under ASU 2014-09 the Corporation believes this compensation will generally 
be recognized earlier as variable consideration. Based on preliminary analysis, the Corporation estimates the cumulative adjustment 
to retained earnings associated with such earlier recognition to be immaterial to its statement of financial position.

In January 2016, the FASB issued ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition 
of Financial Assets and Financial Liabilities," (ASU 2016-01), which makes targeted amendments to fair value measurement and 
disclosure guidance. ASU 2016-01 requires equity investments (other than equity method investments) to be measured at fair value 
with changes in fair value recognized in net income. This change is only applied if a readily determinable fair value can be obtained. 
The update also requires the use of exit prices to measure fair value for disclosure purposes as well as other enhanced disclosure 
requirements. The guidance under ASU 2016-01 is effective for annual and interim periods beginning after December 15, 2017, 
and early adoption is generally not permitted. At adoption on January 1, 2018, cumulative net unrealized gains and losses on equity 
investments  other  than  equity  method  investments  will  be  recognized  as  an  adjustment  to  beginning  retained  earnings  and 
accumulated other comprehensive income (loss). Amendments related to equity securities without a readily determinable fair value 
will be applied prospectively. The Corporation is currently evaluating the impact of adopting ASU 2016-01.

In February 2016, the FASB issued ASU No. 2016-02, “Leases (Topic 842),” (ASU 2016-02), to increase the transparency 
and comparability of lease recognition and disclosure. The update requires lessees to recognize lease contracts with a term greater 
than one year on the balance sheet, while recognizing expenses on the income statement in a manner similar to current guidance. 
For lessors, the update makes targeted changes to the classification criteria and the lessor accounting model to align the guidance 
with the new lessee model and revenue guidance. ASU 2016-02 is effective for the Corporation on January 1, 2019 and must be 
applied using the modified retrospective approach. Early adoption is permitted. Based on preliminary evaluation, the right-of-use 
asset and the corresponding lease liability is expected to be less than one percent of the Corporation’s total assets at adoption. The 

F-60

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Corporation will continue to evaluate for other impacts of adoption, including potential additional regulatory costs, but does not 
anticipate these to be significant.

In March 2016, the FASB issued ASU No. 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements 
to Employee Share-Based Payments Accounting,” (ASU 2016-09), which intends to simplify accounting for share based payment 
transactions, including the income tax consequences and classification of awards. Among other items, the update requires excess 
tax benefits and deficiencies to be recognized as a component of income taxes within the income statement rather than additional 
paid in capital as required in current guidance. The Corporation adopted ASU 2016-09 effective January 1, 2017. The recognition 
of excess tax benefits and deficiencies in the income statement was adopted prospectively. Net excess tax benefits for awards that 
vested, exercised or expired during January 2017 approximated $4 million and were recognized as a component of income taxes 
during the first quarter 2017.

In  connection with  the  adoption  of ASU  2016-09,  the  Corporation  elected  to  recognize  forfeitures  when  they  occur. 
Previously, the Corporation estimated a forfeiture rate in accordance with prior guidance. This amendment was implemented under 
the modified retrospective approach, resulting in a decrease to retained earnings of approximately $2 million, after tax, representing 
the cumulative additional compensation expense that would have been amortized through the date of adoption had this accounting 
policy election been in place. There were no other significant impacts identified pertaining to the adoption of ASU 2016-09.

In June 2016, the FASB issued ASU No. 2016-13, "Financial Instruments - Credit Losses (Topic 326): Measurement of 
Credit Losses on Financial Instruments," (ASU 2016-13), which addresses concerns regarding the perceived delay in recognition 
of credit losses under the existing incurred loss model. The amendment introduces a new, single model for recognizing credit losses 
on all financial instruments presented on cost basis. Under the new model, entities must estimate current expected credit losses 
by considering all available relevant information, including historical and current information, as well as reasonable and supportable 
forecasts of future events. The update also requires additional qualitative and quantitative information to allow users to better 
understand the credit risk within the portfolio and the methodologies for determining allowance. ASU 2016-13 is effective for the 
Corporation on January 1, 2020 and must be applied using the modified retrospective approach with limited exceptions. Early 
adoption is permitted. The Corporation is currently evaluating the impact of adopting ASU 2016-13.

In August 2016, the FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain 
Cash Receipts and Cash Payments,” (ASU 2016-15), which reduces diversity in the presentation of several categories of transactions 
in the cash flow statement. Among other things, the update clarifies the appropriate classification for proceeds from settlement of 
bank owned life insurance (BOLI) policies. Based on preliminary assessments, the Corporation expects to change the classification 
of proceeds from settlement of BOLI policies from operating activities to investing activities. Proceeds from settlement of BOLI 
policies totaled $16 million and $12 million for the years ended December 31, 2016 and 2015, respectively. Other changes in 
classification resulting from this update are not expected to be significant. ASU 2016-15 is effective for the Corporation on January 
1, 2018 and must be applied using the retrospective approach. Early adoption is permitted.

In January 2017, the FASB issued ASU No. 2017-04, “Intangibles - Goodwill and Other (Topic 350): Simplifying the 
Test for Goodwill Impairment,” (ASU 2017-04), which intends to simplify goodwill impairment testing by eliminating the second 
step of the analysis under which the implied fair value of goodwill is determined as if the reporting unit were being acquired in a 
business combination. The update instead requires entities to compare the fair value of a reporting unit with its carrying amount 
and recognize an impairment charge for any amount by which the carrying amount exceeds the reporting unit’s fair value, to the 
extent that the loss recognized does not exceed the amount of goodwill allocated to that reporting unit. ASU 2017-04 must be 
applied prospectively and is effective for the Corporation on January 1, 2020. Early adoption is permitted. The Corporation does 
not expect the new guidance to have a material impact on its financial condition or results of operation.

F-61

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 2 – FAIR VALUE MEASUREMENTS

The Corporation utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to 
determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. In 
cases where quoted market values in an active market are not available, the Corporation uses present value techniques and other 
valuation methods to estimate the fair values of its financial instruments. These valuation methods require considerable judgment 
and the resulting estimates of fair value can be significantly affected by the assumptions made and methods used.

Trading securities, investment securities available-for-sale, derivatives and deferred compensation plan liabilities are 
recorded at fair value on a recurring basis. Additionally, from time to time, the Corporation may be required to record other assets 
and liabilities at fair value on a nonrecurring basis, such as  impaired loans, other real estate (primarily foreclosed property), 
nonmarketable equity securities and certain other assets and liabilities. These nonrecurring fair value adjustments typically involve 
write-downs of individual assets or application of lower of cost or fair value accounting.

Refer to Note 1 for further information about the fair value hierarchy, descriptions of the valuation methodologies and 
key inputs used to measure financial assets and liabilities recorded at fair value, as well as a description of the methods and 
significant assumptions used to estimate fair value disclosures for financial instruments not recorded at fair value in their entirety 
on a recurring basis.

ASSETS AND LIABLILITIES RECORDED AT FAIR VALUE ON A RECURRING BASIS

The following tables present the recorded amount of assets and liabilities measured at fair value on a recurring basis as 

Total

Level 1

Level 2

Level 3

$

87
1
88

$

87
1
88

— $
—
—

of December 31, 2016 and 2015.

(in millions)
December 31, 2016
Trading securities:

Deferred compensation plan assets
Equity and other non-debt securities

Total trading securities

Investment securities available-for-sale:

U.S. Treasury and other U.S. government agency securities
Residential mortgage-backed securities (a)
State and municipal securities
Equity and other non-debt securities

Total investment securities available-for-sale

Derivative assets:

Interest rate contracts
Energy derivative contracts
Foreign exchange contracts
Warrants

Total derivative assets

Total assets at fair value
Derivative liabilities:

$

$

2,779
7,872
7
129
10,787

223
146
38
3
410
11,285

$

2,779
—
—
82
2,861

—
—
—
—
—
2,949

$

Interest rate contracts
Energy derivative contracts
Foreign exchange contracts

$ — $
—
—
—
87
87
(a)  Issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
(b)  Auction-rate securities.

Deferred compensation plan liabilities
Total liabilities at fair value

81
144
29
254
87
341

Total derivative liabilities

$

$

$

$

F-62

—
—
—

—
—
7 (b)
47 (b)
54

11
—
—
3
14
68

—
—
—
—
—
—

—
7,872
—
—
7,872

212
146
38
—
396
8,268

81
144
29
254
—
254

$

$

$

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Total

Level 1

Level 2

Level 3

$

89
3
92

$

89
3
92

— $
—
—

(in millions)
December 31, 2015
Trading securities:

Deferred compensation plan assets
Equity and other non-debt securities

Total trading securities
Investment securities available-for-sale:

U.S. Treasury and other U.S. government agency securities
Residential mortgage-backed securities (a)
State and municipal securities
Corporate debt securities
Equity and other non-debt securities

Total investment securities available-for-sale

Derivative assets:

Interest rate contracts
Energy derivative contracts
Foreign exchange contracts
Warrants

Total derivative assets

Total assets at fair value
Derivative liabilities:

$

$

2,763
7,545
9
1
201
10,519

286
475
57
2
820
11,431

$

2,763
—
—
—
134
2,897

—
—
—
—
—
2,989

$

Interest rate contracts
Energy derivative contracts
Foreign exchange contracts

— $
—
—
—
89
89
(a)  Issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
(b)  Auction-rate securities.

Deferred compensation plan liabilities
Total liabilities at fair value

92
472
46
610
89
699

Total derivative liabilities

$

$

$

$

$

—
—
—

—
—
9 (b)
1 (b)
67 (b)
77

9
—
—
2
11
88

—
—
—
—
—
—

—
7,545
—
—
—
7,545

277
475
57
—
809
8,354

92
472
46
610
—
610

$

$

$

There were no transfers of assets or liabilities recorded at fair value on a recurring basis into or out of Level 1, Level 2 

and Level 3 fair value measurements during the years ended December 31, 2016 and 2015.

F-63

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table summarizes the changes in Level 3 assets measured at fair value on a recurring basis for the years 

ended December 31, 2016 and 2015.

Net Realized/Unrealized Gains (Losses)
(Pretax)

Balance 
at
Beginning
of Period

Recorded in Earnings

Realized Unrealized

Recorded in
Other
Comprehensive
Income

Redemptions

Sales

Balance 
at
End of 
Period

(in millions)
Year Ended December 31, 2016

Investment securities available-for-sale:

State and municipal securities (a)
Corporate debt securities (a)
Equity and other non-debt securities (a)

$

Total investment securities

available-for-sale

Derivative assets:

Interest rate contracts
Warrants

Year Ended December 31, 2015

Investment securities available-for-sale:

State and municipal securities (a)
Corporate debt securities (a)
Equity and other non-debt securities (a)

$

Total investment securities

available-for-sale

Derivative assets:

Interest rate contracts
Warrants

9
1
67

77

9
2

23
1
112

136

—
4

$

$

$ —
—
—

$ —
—
—

—

—

—
6 (b)

2 (b)
1 (b)

$ —
—
(2) (d)

$ —
—
—

(2) (d)

—

—
6 (b)

9 (b)
(1) (b)

—
—
(1) (c)

(1) (c)

—
—

—
—
1 (c)

1 (c)

—
—

(2) $ — $
(1)
(19)

—
—

(22)

—

—
—

—
(6)

(14) $ — $
—
(44)

—
—

(58)

—

—
—

—
(7)

7
—
47

54

11
3

9
1
67

77

9
2

(a)  Auction-rate securities.
(b)  Realized and unrealized gains and losses due to changes in fair value recorded in "other noninterest income" on the consolidated statements 

of income.

(c)  Recorded in "net unrealized gains (losses) on investment securities available-for-sale" in other comprehensive income (loss).
(d)  Realized and unrealized gains and losses due to changes in fair value recorded in "net securities losses" on the consolidated statements of 

income.

ASSETS AND LIABILITIES RECORDED AT FAIR VALUE ON A NONRECURRING BASIS

The Corporation may be required, from time to time, to record certain assets and liabilities at fair value on a nonrecurring 
basis. These include assets that are recorded at the lower of cost or fair value, and were recognized at fair value since it was less 
than cost at the end of the period.

F-64

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table presents assets recorded at fair value on a nonrecurring basis at December 31, 2016 and 2015. No

liabilities were recorded at fair value on a nonrecurring basis at December 31, 2016 and 2015.

(in millions)
December 31, 2016

Loans:

Commercial
Commercial mortgage
International

Total loans
Other real estate
Total assets at fair value

December 31, 2015

Loans held-for-sale:
Commercial

Loans:

Commercial
Commercial mortgage
International

Total loans
Other real estate
Total assets at fair value excluding investments recorded at net asset value
Other investments recorded at net asset value:

Nonmarketable equity securities (a)

Total assets at fair value

Total

Level 2

Level 3

$

$

$

$

256
15
11
282
1
283

$

$

— $
—
—
—
—
— $

8

$

8

$

—
—
—
—
—
8

134
11
8
153
2
163

1
164

256
15
11
282
1
283

—

134
11
8
153
2
155

(a)  Certain investments that are measured at fair value using the net asset value have not been classified in the fair value hierarchy. The fair 
value amounts presented in the table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the 
consolidated balance sheets.

Level 3 assets recorded at fair value on a nonrecurring basis at December 31, 2016 and 2015 included loans for which a 
specific allowance was established based on the fair value of collateral and other real estate for which fair value of the properties 
was less than the cost basis. For both asset classes, the unobservable inputs were the additional adjustments applied by management 
to the appraised values to reflect such factors as non-current appraisals and revisions to estimated time to sell. These adjustments 
are determined based on qualitative judgments made by management on a case-by-case basis and are not quantifiable inputs, 
although they are used in the determination of fair value.

The  following  table  presents  quantitative  information  related  to  the  significant  unobservable  inputs  utilized  in  the 
Corporation's Level 3 recurring fair value measurement as of December 31, 2016 and December 31, 2015. The Corporation's 
Level 3 recurring fair value measurements include auction-rate securities where fair value is determined using an income approach 
based on a discounted cash flow model. The inputs in the table below reflect management's expectation of continued illiquidity 
in the secondary auction-rate securities market due to a lack of market activity for the issuers remaining in the portfolio, a lack of 
market incentives for issuer redemptions, and the expectation for a continuing low interest rate environment. The December 31, 
2016 workout periods reflect management's expectation of the pace at which short-term interest rates could rise.

Discounted Cash Flow Model
Unobservable Input

Fair Value
(in millions)

Discount Rate

Workout Period 
(in years)

$

$

7
47

9
67

4% - 6%
7% - 9%

3% -  8%
4% -  9%

1 - 2
1 - 2

1 - 2
1

December 31, 2016
State and municipal securities (a)
Equity and other non-debt securities (a)
December 31, 2015
State and municipal securities (a)
Equity and other non-debt securities (a)
(a)  Auction-rate securities.

F-65

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

ESTIMATED FAIR VALUES OF FINANCIAL INSTRUMENTS NOT RECORDED AT FAIR VALUE ON A RECURRING BASIS

The Corporation typically holds the majority of its financial instruments until maturity and thus does not expect to realize 
many of the estimated fair value amounts disclosed. The disclosures also do not include estimated fair value amounts for items 
that are not defined as financial instruments, but which have significant value. These include such items as core deposit intangibles, 
the  future  earnings  potential  of  significant  customer  relationships  and  the  value  of  trust  operations  and  other  fee  generating 
businesses. The Corporation believes the imprecision of an estimate could be significant.

The carrying amount and estimated fair value of financial instruments not recorded at fair value in their entirety on a 

recurring basis on the Corporation’s consolidated balance sheets are as follows:

(in millions)
December 31, 2016
Assets

Cash and due from banks
Interest-bearing deposits with banks
Investment securities held-to-maturity
Loans held-for-sale
Total loans, net of allowance for loan losses (a)
Customers’ liability on acceptances outstanding
Restricted equity investments
Nonmarketable equity securities (b)

Liabilities

Demand deposits (noninterest-bearing)
Interest-bearing deposits
Customer certificates of deposit

Total deposits

Short-term borrowings
Acceptances outstanding
Medium- and long-term debt

Credit-related financial instruments
December 31, 2015
Assets

Cash and due from banks
Interest-bearing deposits with banks
Investment securities held-to-maturity
Loans held-for-sale (c)
Total loans, net of allowance for loan losses (a)
Customers’ liability on acceptances outstanding
Restricted equity investments
Nonmarketable equity securities (b) (d)

Liabilities

$

$

Carrying
Amount

Total

Estimated Fair Value
Level 2
Level 1

Level 3

$

$

1,249
5,969
1,582
4
48,358
5
207
11

31,540
24,639
2,806
58,985
25
5
5,160
(73)

1,157
4,990
1,981
21
48,450
5
92
10

$

$

1,249
5,969
1,576
4
48,250
5
207
16

31,540
24,639
2,731
58,910
25
5
5,132
(73)

1,157
4,990
1,973
21
48,269
5
92
18

$

$

1,249
5,969
—
—
—
5
207

—
—
—
—
25
5
—
—

1,157
4,990
—
—
—
5
92

— $
—
1,576
4
—
—
—

—
—
—
—
48,250
—
—

31,540
24,639
2,731
58,910
—
—
5,132
—

—
—
—
—
—
—
—
(73)

— $
—
1,973
21
—
—
—

—
—
—
—
48,269
—
—

Total deposits

Demand deposits (noninterest-bearing)
Interest-bearing deposits
Customer certificates of deposit

—
30,839
—
25,462
—
3,552
—
59,853
—
23
—
5
—
3,058
Credit-related financial instruments
(83)
(83)
(a)  Included $282 million and $153 million of impaired loans recorded at fair value on a nonrecurring basis at December 31, 2016 and 2015, 

Short-term borrowings
Acceptances outstanding
Medium- and long-term debt

30,839
25,462
3,536
59,837
23
5
3,032
(83)

30,839
25,462
3,536
59,837
—
—
3,032
—

—
—
—
—
23
5
—
—

respectively.

(b)  Certain investments that are measured at fair value using the net asset value have not been classified in the fair value hierarchy. The fair 
value amounts presented in the table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the 
consolidated balance sheets.

(c)  Included $8 million impaired loans held-for-sale recorded at fair value on a nonrecurring basis at December 31, 2015.
(d)  Included $1 million of nonmarketable equity securities recorded at fair value on a nonrecurring basis at December 31, 2015.

F-66

 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 3 - INVESTMENT SECURITIES

A summary of the Corporation’s investment securities follows:

(in millions)
December 31, 2016
Investment securities available-for-sale:

U.S. Treasury and other U.S. government agency securities $
Residential mortgage-backed securities (a)
State and municipal securities
Equity and other non-debt securities

Total investment securities available-for-sale (b)

Investment securities held-to-maturity (c):

Residential mortgage-backed securities (a)

December 31, 2015
Investment securities available-for-sale:

$

$

U.S. Treasury and other U.S. government agency securities $
Residential mortgage-backed securities (a)
State and municipal securities
Corporate debt securities
Equity and other non-debt securities

Total investment securities available-for-sale (b)

$

Investment securities held-to-maturity (c):

Amortized
Cost

Gross
Unrealized
Gains

Gross
Unrealized
Losses

Fair Value

2,772
7,921
7
129
10,829

1,582

2,769
7,513
9
1
199
10,491

$

$

$

$

$

8
48
—
1
57

1

1
76
—
—
2
79

$

$

$

$

$

1
97
—
1
99

7

7
44
—
—
—
51

$

$

$

$

$

2,779
7,872
7
129
10,787

1,576

2,763
7,545
9
1
201
10,519

Residential mortgage-backed securities (a)

2
(a)  Issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
(b)  Included auction-rate securities at amortized cost and fair value of $55 million and $54 million, respectively, as of December 31, 2016 and 

1,973

1,981

10

$

$

$

$

$76 million and $77 million, respectively, as of December 31, 2015.

(c)  The amortized cost of investment securities held-to-maturity included net unrealized losses of $12 million at December 31, 2016 and $15 
million  at  December 31,  2015  related  to  securities  transferred  from  available-for-sale,  which  are  included  in  accumulated  other 
comprehensive loss.

F-67

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

A summary of the Corporation’s investment securities in an unrealized loss position as of December 31, 2016 and 2015

follows:

(in millions)
December 31, 2016

Less than 12 Months

Temporarily Impaired
12 Months or more

Total

Fair
Value

Unrealized
Losses

Fair
Value

Unrealized
Losses

Fair
Value

Unrealized
Losses

U.S. Treasury and other U.S. government

agency securities

Residential mortgage-backed securities (a)
State and municipal securities (b)
Equity and other non-debt securities (b)
Total impaired securities

December 31, 2015

U.S. Treasury and other U.S. government

agency securities

Residential mortgage-backed securities (a)
State and municipal securities (b)
Corporate debt securities (b)
Equity and other non-debt securities (b)
Total impaired securities

$

527
4,992
—
36
$ 5,555

$ 2,265
2,665
—
—
14
$ 4,944

$

$

$

$

1
87
—
— (c)
88

$

— $

1,177
7
11
$ 1,195

$

—
32
— (c)
— (c)
32

$

527
6,169
7
47
$ 6,750

7
21
—
—
— (c)
28

$

— $

1,976
9
1
—
$ 1,986

$

—
51
— (c)
— (c)
—
51

$ 2,265
4,641
9
1
14
$ 6,930

$

$

$

$

1
119
— (c)
— (c)
120

7
72
— (c)
— (c)
— (c)
79

(a)  Issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
(b)  Primarily auction-rate securities.
(c)  Unrealized losses less than $0.5 million.

At December 31, 2016, the Corporation had 228 securities in an unrealized loss position with no credit impairment, 
including 7 U.S. Treasury securities, 179 residential mortgage-backed securities, 14 state and municipal auction-rate securities, 
and 28 equity and other non-debt auction-rate preferred securities. As of December 31, 2016, approximately 96 percent of the 
aggregate par value of auction-rate securities have been redeemed or sold since acquisition, of which approximately 90 percent
were redeemed at or above cost. The unrealized losses for these securities resulted from changes in market interest rates and 
liquidity. The Corporation ultimately expects full collection of the carrying amount of these securities, does not intend to sell the 
securities in an unrealized loss position, and it is not more-likely-than-not that the Corporation will be required to sell the securities 
in an unrealized loss position prior to recovery of amortized cost. The Corporation does not consider these securities to be other-
than-temporarily impaired at December 31, 2016.

Sales, calls and write-downs of investment securities available-for-sale resulted in the following gains and losses recorded 
in “net securities losses” on the consolidated statements of income, computed based on the adjusted cost of the specific security.

(in millions)
Years Ended December 31
Securities gains
Securities losses (a)
Net securities losses
(a)  Primarily charges related to a derivative contract tied to the conversion rate of Visa Class B shares.

—
(2)
(2)

—
(5)
(5)

2015

2016

$

$

$

$

2014

2
(2)
—

$

$

The following table summarizes the amortized cost and fair values of debt securities by contractual maturity. Securities 
with multiple maturity dates are classified in the period of final maturity. Expected maturities will differ from contractual maturities 
because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.

F-68

 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

(in millions)
December 31, 2016
Contractual maturity
Within one year
After one year through five years
After five years through ten years
After ten years
Subtotal

Equity and other non-debt securities
Total investment securities

Available-for-sale

Held-to-maturity

Amortized Cost

Fair Value

Amortized Cost

Fair Value

$

$

30
2,840
1,707
6,123
10,700
129
10,829

$

$

30 $

2,847
1,742
6,039
10,658
129
10,787 $

— $
—
23
1,559
1,582
—
1,582

$

—
—
23
1,553
1,576
—
1,576

Included in the contractual maturity distribution in the table above were residential mortgage-backed securities available-
for-sale with a total amortized cost and fair value of $7.9 billion, and residential mortgage-backed securities held-to-maturity with 
a total amortized cost and fair value of $1.6 billion. The actual cash flows of mortgage-backed securities may differ from contractual 
maturity as the borrowers of the underlying loans may exercise prepayment options.

At December 31, 2016, investment securities with a carrying value of $1.5 billion were pledged where permitted or 
required by law to secure $981 million of liabilities, primarily public and other deposits of state and local government agencies 
and derivative instruments.

F-69

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 4 – CREDIT QUALITY AND ALLOWANCE FOR CREDIT LOSSES

The following table presents an aging analysis of the recorded balance of loans.

(in millions)
December 31, 2016
Business loans:
Commercial
Real estate construction:

Commercial Real Estate business line (a)
Other business lines (b)

Total real estate construction

Commercial mortgage:

Commercial Real Estate business line (a)
Other business lines (b)

Total commercial mortgage

Lease financing
International

Total business loans

Retail loans:

Residential mortgage
Consumer:

Home equity
Other consumer

Total consumer

Total retail loans

Total loans
December 31, 2015
Business loans:
Commercial
Real estate construction:

Commercial Real Estate business line (a)
Other business lines (b)

Total real estate construction

Commercial mortgage:

Commercial Real Estate business line (a)
Other business lines (b)

Total commercial mortgage

Lease financing
International

Total business loans

Retail loans:

Residential mortgage
Consumer:

Home equity
Other consumer

Total consumer

Total retail loans

Loans Past Due and Still Accruing

30-59 
Days

60-89 
Days

90 Days
or More

Total

Nonaccrual
Loans

Current
Loans

Total 
Loans

$

30

$

12

$

14

$

56

$

445

$

30,493

$ 30,994

—
—
—

5
58
63
—
1
94

7

4
1
5
12
106

$

—
—
—

—
5
5
—
—
17

3

3
—
3
6
23

$

—
—
—

—
5
5
—
—
19

—

—
—
—
—
19

—
—
—

5
68
73
—
1
130

10

7
1
8
18
$ 148

$

—
—
—

9
37
46
6
14
511

39

28
4
32
71
582

2,485
384
2,869

2,004
6,808
8,812
566
1,243
43,983

2,485
384
2,869

2,018
6,913
8,931
572
1,258
44,624

1,893

1,942

1,765
717
2,482
4,375
48,358

1,800
722
2,522
4,464
$ 49,088

$

46

$

12

$

13

$

71

$

238

$

31,350

$ 31,659

$

$

5
3
8

7
7
14
—
2
70

26

5
7
12
38
108

—
—
—

1
3
4
—
—
17

—

—
—
—
—
17

5
3
8

8
15
23
—
2
104

27

8
7
15
42
$ 146

$

—
1
1

16
44
60
6
8
313

27

27
—
27
54
367

1,676
316
1,992

2,080
6,814
8,894
718
1,358
44,312

1,681
320
2,001

2,104
6,873
8,977
724
1,368
44,729

1,816

1,870

1,685
758
2,443
4,259
48,571

1,720
765
2,485
4,355
$ 49,084

$

—
—
—

—
5
5
—
—
17

1

3
—
3
4
21

F-70

$

$

Total loans
(a)  Primarily loans to real estate developers.
(b)  Primarily loans secured by owner-occupied real estate.

$

 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table presents loans by credit quality indicator, based on internal risk ratings assigned to each business 
loan at the time of approval and subjected to subsequent reviews, generally at least annually, and to pools of retail loans with 
similar risk characteristics.

(in millions)
December 31, 2016
Business loans:
Commercial
Real estate construction:

Commercial Real Estate business line (e)
Other business lines (f)

Total real estate construction

Commercial mortgage:

Commercial Real Estate business line (e)
Other business lines (f)

Total commercial mortgage

Lease financing
International

Total business loans

Retail loans:

Residential mortgage
Consumer:

Home equity
Other consumer

Total consumer

Total retail loans

Total loans
December 31, 2015
Business loans:
Commercial
Real estate construction:

Commercial Real Estate business line (e)
Other business lines (f)

Total real estate construction

Commercial mortgage:

Commercial Real Estate business line (e)
Other business lines (f)

Total commercial mortgage

Lease financing
International

Total business loans

Retail loans:

Residential mortgage
Consumer:

Home equity
Other consumer

Total consumer

Total retail loans

Pass (a)

Internally Assigned Rating
Special
Mention (b)

Substandard (c)

Nonaccrual (d)

Total

$

28,616

$

944

$

989

$

445

$

30,994

2,485
381
2,866

1,970
6,645
8,615
550
1,200
41,847

1,900

1,767
718
2,485
4,385
46,232

$

—
—
—

19
109
128
11
22
1,105

3

1
—
1
4
1,109

$

—
3
3

20
122
142
5
22
1,161

—

4
—
4
4
1,165

$

—
—
—

9
37
46
6
14
511

39

28
4
32
71
582

$

2,485
384
2,869

2,018
6,913
8,931
572
1,258
44,624

1,942

1,800
722
2,522
4,464
49,088

29,117

$

1,293

$

1,011

$

238

$

31,659

1,681
318
1,999

2,031
6,536
8,567
693
1,245
41,621

1,828

1,687
755
2,442
4,270
45,891

$

—
1
1

31
172
203
17
59
1,573

2

1
3
4
6
1,579

$

—
—
—

26
121
147
8
56
1,222

13

5
7
12
25
1,247

$

—
1
1

16
44
60
6
8
313

27

27
—
27
54
367

$

1,681
320
2,001

2,104
6,873
8,977
724
1,368
44,729

1,870

1,720
765
2,485
4,355
49,084

$

$

$

Total loans
(a) 
(b) 

Includes all loans not included in the categories of special mention, substandard or nonaccrual.
Special mention loans are accruing loans that have potential credit weaknesses that deserve management’s close attention, such as loans to borrowers who may be experiencing 
financial difficulties that may result in deterioration of repayment prospects from the borrower at some future date. This category is generally consistent with the "special mention" 
category as defined by regulatory authorities.
Substandard loans are accruing loans that have a well-defined weakness, or weaknesses, such as loans to borrowers who may be experiencing losses from operations or inadequate 
liquidity of a degree and duration that jeopardizes the orderly repayment of the loan. Substandard loans also are distinguished by the distinct possibility of loss in the future if 
these weaknesses are not corrected. This category is generally consistent with the "substandard" category as defined by regulatory authorities.

(c) 

(d)  Nonaccrual loans are loans for which the accrual of interest has been discontinued. For further information regarding nonaccrual loans, refer to the Nonperforming Assets 
subheading in Note 1 - Basis of Presentation and Accounting Policies. A significant majority of nonaccrual loans are generally consistent with the "substandard" category and 
the remainder are generally consistent with the "doubtful" category as defined by regulatory authorities.

(e)  Primarily loans to real estate developers.
(f) 

Primarily loans secured by owner-occupied real estate.

F-71

 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table summarizes nonperforming assets.

(in millions)
Nonaccrual loans
Reduced-rate loans (a)
Total nonperforming loans
Foreclosed property (b)
Total nonperforming assets
(a)  There were no reduced-rate business loans at both December 31, 2016 and at December 31, 2015. Reduced-rate retail loans totaled $8 

December 31, 2016
582
$
8
590
17
607

December 31, 2015
367
$
12
379
12
391

$

$

million and $12 million at December 31, 2016 and 2015, respectively.

(b)  Included foreclosed residential real estate properties of $3 million and $9 million at December 31, 2016 and 2015, respectively. 

There were no retail loans secured by residential real estate properties in process of foreclosure included in nonaccrual 

loans at December 31, 2016 compared to $1 million at December 31, 2015.

Allowance for Credit Losses

The following table details the changes in the allowance for loan losses and related loan amounts.

Business
Loans

2016
Retail
Loans

Total

Business
Loans

2015
Retail
Loans

Total

Business
Loans

2014
Retail
Loans

Total

(in millions)

Years Ended December 31
Allowance for loan losses:
Balance at beginning of

period

Loan charge-offs
Recoveries on loans

previously charged-off
Net loan (charge-offs)

recoveries

Provision for loan losses
Foreign currency translation

adjustment

Balance at end of period

$

$

579
(207)

$

63

(144)
246

1
682

$

55
(7)

5

(2)
(5)

—
48

$

634
(214)

$

$

534
(157)

60
(11)

$

594
(168)

$

$

531
(87)

67
(15)

$

598
(102)

68

(146)
241

55

(102)
149

1
730

$

(2)
579

$

$

13

2
(7)

—
55

68

(100)
142

(2)
634

$

$

68

(19)
23

(1)
534

$

9

(6)
(1)

—
60

$

77

(25)
22

(1)
594

As a percentage of total loans

1.53% 1.08%

1.49%

1.30%

1.26%

1.29%

1.20%

1.43%

1.22%

December 31
Allowance for loan losses:
Individually evaluated for

impairment

$

86

$

Collectively evaluated for

impairment
Total allowance for loan

losses

596

$

682

Loans:

Individually evaluated for

impairment

$

566

$

$

3

45

48

$

89

641

$

730

48

$

614

$

$

$

53

$ — $

53

$

39

$ — $

39

526

579

$

55

55

393

$

31

581

634

424

$

$

$

$

495

534

$

60

60

177

$

42

555

594

219

$

$

Collectively evaluated for

impairment
Total loans evaluated for

impairment

44,058

4,416

48,474

44,336

4,324

48,660

44,203

4,171

48,374

$44,624

$ 4,464

$49,088

$ 44,729

$ 4,355

$ 49,084

$ 44,380

$ 4,213

$ 48,593

F-72

 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Changes in the allowance for credit losses on lending-related commitments, included in "accrued expenses and other 

liabilities" on the consolidated balance sheets, are summarized in the following table.

(in millions)
Years Ended December 31
Balance at beginning of period
Charge-offs on lending-related commitments (a)

Provision for credit losses on lending-related commitments
Balance at end of period
(a)  Charge-offs result from the sale of unfunded lending-related commitments.

Individually Evaluated Impaired Loans

2016

2015

2014

$

$

45
(11)
7
41

$

$

41
(1)
5
45

$

$

36
—

5
41

The following table presents additional information regarding individually evaluated impaired loans.

(in millions)
December 31, 2016
Business loans:
Commercial
Commercial mortgage:

Commercial Real Estate business line (a)
Other business lines (b)

Total commercial mortgage

International

Total business loans

Retail loans:

Residential mortgage
Consumer:

Home equity
Other consumer

Total consumer

Total retail loans (c)

Total individually evaluated impaired loans
December 31, 2015
Business loans:
Commercial
Commercial mortgage:

$

$

Commercial Real Estate business line (a)
Other business lines (b)

Total commercial mortgage

International

Total business loans

Retail loans:

Residential mortgage
Consumer:

Home equity
Other consumer

Total consumer

Total retail loans (c)

Impaired
Loans with
No Related
Allowance

Recorded Investment In:
Impaired
Loans with
Related
Allowance

Total
Impaired
Loans

Unpaid
Principal
Balance

Related
Allowance
for Loan
Losses

$

90

$

423

$

513

$

608

$

—
2
2
3
95

19

15
2
17
36
131

$

7
30
37
11
471

9

—
3
3
12
483

$

7
32
39
14
566

28

15
5
20
48
614

$

15
40
55
20
683

30

19
6
25
55
738

$

82

$

252

$

334

$

398

$

7
2
9
—
91

13

8
32
40
10
302

—

15
34
49
10
393

13

38
55
93
17
508

13

12
6
18
31
122

—
—
—
—
302

12
6
18
31
424

16
10
26
39
547

80

1
3
4
2
86

2

—
1
1
3
89

45

1
5
6
2
53

—

—
—
—
—
53

Total individually evaluated impaired loans
(a)  Primarily loans to real estate developers.
(b)  Primarily loans secured by owner-occupied real estate.
(c)  Individually evaluated retail loans generally have no related allowance for loan losses, primarily due to policy which results in direct write-

$

$

$

$

$

downs of most restructured retail loans. 

F-73

 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table presents information regarding average individually evaluated impaired loans and the related interest 

recognized. Interest income recognized for the period primarily related to reduced-rate loans.

2016

Individually Evaluated Impaired Loans
2015

2014

Average
Balance for
the Period

Interest
Income
Recognized
for the Period

Average
Balance for
the Period

Interest
Income
Recognized
for the Period

Average
Balance for
the Period

Interest
Income
Recognized
for the Period

$

550

$

10

$

206

$

5

$

77

$

—

9
31
40
18
608

15

13
4
17
32

—

—
1
1
—
11

—

—
—
—
—

—

16
39
55
6
267

21

12
6
18
39

—

—
1
1
—
6

—

—
—
—
—

14

48
64
112
2
205

30

12
4
16
46

$

640

$

11

$

306

$

6

$

251

$

2

—

—
2
2
—
4

—

—
—
—
—

4

(in millions)
Years Ended December 31
Business loans:
Commercial
Real estate construction:

Commercial Real Estate

business line (a)
Commercial mortgage:

Commercial Real Estate

business line (a)

Other business lines (b)

Total commercial mortgage

International

Total business loans

Retail loans:

Residential mortgage
Consumer:

Home equity
Other consumer

Total consumer

Total retail loans
Total individually evaluated impaired

loans

(a)  Primarily loans to real estate developers.
(b)  Primarily loans secured by owner-occupied real estate.

F-74

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Troubled Debt Restructurings 

The following tables detail the recorded balance at December 31, 2016 and 2015 of loans considered to be TDRs that 
were restructured during the years ended December 31, 2016 and 2015, by type of modification. In cases of loans with more than 
one type of modification, the loans were categorized based on the most significant modification.

2016

Type of Modification

2015

Type of Modification

Principal
Deferrals (a)

Interest
Rate
Reductions

AB Note
Restructures (b)

Total
Modifications

Principal
Deferrals (a)

Interest
Rate
Reductions

Total
Modifications

$

140

$

— $

48 $

188

$

160

$

— $

—

5
5
—
145

—

—

—
—
—
—

2

2 (e)
2
147

$

$

1
3
3 $

—

—
—
3
51

—

—
—
51 $

—

5
5
3
196

2

3
5
201

8

6
14
2
176

—

—

—
—
—
—

—

1 (e)
1
177

$

$

2
2
2 $

160

8

6
14
2
176

—

3
3
179

(in millions)

Years Ended December 31
Business loans:
Commercial
Commercial mortgage:

Commercial Real Estate

business line (c)
Other business lines (d)

Total commercial mortgage

International

Total business loans

Retail loans:

Residential mortgage
Consumer:

Home equity

Total retail loans

Total loans

(a)  Primarily represents loan balances where terms were extended 90 days or more at or above contractual interest rates.
(b)  Loan restructurings whereby the original loan is restructured into two notes: an "A" note, which generally reflects the portion of the modified 

loan which is expected to be collected; and a "B" note, which is either fully charged off or exchanged for an equity interest. 

(c)  Primarily loans to real estate developers.
(d)  Primarily loans secured by owner-occupied real estate.
(e)  Includes bankruptcy loans for which the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt.

At December 31, 2016 and 2015, commitments to lend additional funds to borrowers whose terms have been modified 

in TDRs totaled $24 million and $6 million, respectively.

The majority of the modifications considered to be TDRs that occurred during the years ended December 31, 2016 and 
2015  were  principal  deferrals.  The  Corporation  charges  interest  on  principal  balances  outstanding  during  deferral  periods.  
Additionally, none of the modifications involved forgiveness of principal. As a result, the current and future financial effects of 
the recorded balance of loans considered to be TDRs that were restructured during the years ended December 31, 2016 and 2015
were insignificant. 

On an ongoing basis, the Corporation monitors the performance of modified loans to their restructured terms. In the event 
of a subsequent default, the allowance for loan losses continues to be reassessed on the basis of an individual evaluation of the 
loan.

F-75

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table presents information regarding the recorded balance at December 31, 2016 and 2015 of loans modified 
by principal deferral during the years ended December 31, 2016 and 2015, and those principal deferrals which experienced a 
subsequent default during the same periods. For principal deferrals, incremental deterioration in the credit quality of the loan, 
represented by a downgrade in the risk rating of the loan, for example, due to missed interest payments or a reduction of collateral 
value, is considered a subsequent default. 

(in millions)
Principal deferrals:
Business loans:
Commercial
Commercial mortgage:

Commercial Real Estate business line (a)
Other business lines (b)

Total commercial mortgage

International

Total business loans

Retail loans:
Consumer:

Home equity

Total principal deferrals

2016

2015

Balance at
December 31

Subsequent
Default in the
Year Ended
December 31

Balance at
December 31

Subsequent
Default in the
Year Ended
December 31

$

140

$

13

$

160

$

—
5
5
—
145

2 (c)

$

147

$

—
1
1
—
14

—
14

8
6
14
2
176

1 (c)

$

177

$

16

1
1
2
—
18

—
18

(a)  Primarily loans to real estate developers.
(b)  Primarily loans secured by owner-occupied real estate.
(c)  Includes bankruptcy loans for which the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt.

During  the  years  ended  December 31,  2016  and  2015,  loans  with  a  carrying  value  of  $4  million  and  $2  million  at 
December 31, 2016 and 2015, respectively, were modified by interest rate reduction. During the year ended December 31, 2016, 
loans with a carrying value of $51 million at December 31, 2016, were restructured into two notes (AB note restructures). For 
reduced-rate and AB note restructures, a subsequent payment default is defined in terms of delinquency, when a principal or interest 
payment is 90 days past due. There were no subsequent payment defaults of reduced rate loans or AB note restructures during the 
years ended December 31, 2016 and 2015.

NOTE 5 - SIGNIFICANT GROUP CONCENTRATIONS OF CREDIT RISK

Concentrations of credit risk may exist when a number of borrowers are engaged in similar activities, or activities in the 
same geographic region, and have similar economic characteristics that would cause them to be similarly impacted by changes in 
economic or other conditions. Concentrations of both on-balance sheet and off-balance sheet credit risk are controlled and monitored 
as part of credit policies. The Corporation is a regional financial services holding company with a geographic concentration of its 
on-balance-sheet and off-balance-sheet activities in Michigan, California and Texas.

As outlined below, the Corporation has a concentration of credit risk with the automotive industry. Loans to automotive 
dealers and to borrowers involved with automotive production are reported as automotive, as management believes these loans 
have similar economic characteristics that might cause them to react similarly to changes in economic conditions. This aggregation 
involves the exercise of judgment. Included in automotive production are: (a) original equipment manufacturers and Tier 1 and 
Tier 2 suppliers that produce components used in vehicles and whose primary revenue source is automotive-related (“primary” 
defined as greater than 50%) and (b) other manufacturers that produce components used in vehicles and whose primary revenue 
source is automotive-related. Loans less than $1 million and loans recorded in the Small Business loan portfolio were excluded 
from the definition. Outstanding loans, included in "commercial loans" on the consolidated balance sheets, and total exposure 
from loans, unused commitments and standby letters of credit to companies related to the automotive industry were as follows:

F-76

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

(in millions)
December 31
Automotive loans:

Production
Dealer

Total automotive loans
Total automotive exposure:

Production
Dealer

Total automotive exposure

2016

2015

$

$

$

$

1,326
7,123
8,449

2,534
8,730
11,264

$

$

$

$

1,266
6,573
7,839

2,452
8,209
10,661

Further, the Corporation’s portfolio of commercial real estate loans, which includes real estate construction and commercial 

mortgage loans, was as follows.

(in millions)
December 31
Real estate construction loans:

Commercial Real Estate business line (a)
Other business lines (b)

Total real estate construction loans

Commercial mortgage loans:

Commercial Real Estate business line (a)
Other business lines (b)

Total commercial mortgage loans
Total commercial real estate loans
Total unused commitments on commercial real estate loans

(a)  Primarily loans to real estate developers.
(b)  Primarily loans secured by owner-occupied real estate.

NOTE 6 - PREMISES AND EQUIPMENT

A summary of premises and equipment by major category follows:

(in millions)
December 31
Land
Buildings and improvements
Furniture and equipment

Total cost

Less: Accumulated depreciation and amortization

Net book value

2016

2015

2,485
384
2,869

2,018
6,913
8,931
11,800
3,046

$

$
$

1,681
320
2,001

2,104
6,873
8,977
10,978
3,063

2016

2015

86
831
499
1,416
(915)
501

$

$

87
862
490
1,439
(889)
550

$

$
$

$

$

The Corporation conducts a portion of its business from leased facilities and leases certain equipment. Rental expense 
for leased properties and equipment amounted to $80 million, $79 million and $89 million in 2016, 2015 and 2014, respectively. 
Lease termination charges included in rental expense were approximately $2 million and $10 million in 2016 and 2014, respectively. 
No lease termination charges were included in rent expense in 2015. As of December 31, 2016, future minimum rental payments 
under operating leases were as follows:

(in millions)
Years Ending December 31
2017
2018
2019
2020
2021
Thereafter
Total

$

$

72
66
56
46
36
116
392

F-77

 
 
 
 
 
 
 
  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 7 - GOODWILL AND CORE DEPOSIT INTANGIBLES

The following table summarizes the carrying value of goodwill for the years ended December 31, 2016, 2015 and 2014.

(in millions)
December 31
Business Bank
Retail Bank
Wealth Management

Total

2016

2015

2014

$

$

380 $
194
61
635 $

380 $
194
61
635 $

380
194
61
635

The Corporation performs its annual evaluation of goodwill impairment in the third quarter of each year and on an interim 
basis if events or changes in circumstances between annual tests indicate goodwill might be impaired. In 2016 and 2015, the annual 
test of goodwill impairment was performed as of the beginning of the third quarter. At the conclusion of the first step of the annual 
and interim goodwill impairment tests performed in 2016 and 2015 the estimated fair values of all reporting units exceeded their 
carrying amounts, including goodwill, indicating that goodwill was not impaired. There have been no events since the annual test 
performed in the third quarter 2016 that would indicate that it was more likely than not that goodwill had become impaired. 

A summary of core deposit intangible carrying value and related accumulated amortization follows:

(in millions)
December 31
Gross carrying amount
Accumulated amortization

Net carrying amount

2016

2015

$

$

34
(26)
8

$

$

34
(24)
10

The Corporation recorded amortization expense related to the core deposit intangible of $2 million and $3 million for the 
years ended December 31, 2016 and 2015, respectively. At December 31, 2016, estimated future amortization expense was as 
follows:

(in millions)
Years Ending December 31
2017
2018
2019
2020
2021

Total

$

$

2
2
2
1
1
8

NOTE 8 - DERIVATIVE AND CREDIT-RELATED FINANCIAL INSTRUMENTS

In the normal course of business, the Corporation enters into various transactions involving derivative and credit-related 
financial instruments to manage exposure to fluctuations in interest rate, foreign currency and other market risks and to meet the 
financing needs of customers (customer-initiated derivatives). These financial instruments involve, to varying degrees, elements 
of market and credit risk. Market and credit risk are included in the determination of fair value.

Market risk is the potential loss that may result from movements in interest rates, foreign currency exchange rates or 
energy commodity prices that cause an unfavorable change in the value of a financial instrument. The Corporation manages this 
risk by establishing monetary exposure limits and monitoring compliance with those limits. Market risk inherent in interest rate 
and energy contracts entered into on behalf of customers is mitigated by taking offsetting positions, except in those circumstances 
when the amount, tenor and/or contract rate level results in negligible economic risk, whereby the cost of purchasing an offsetting 
contract is not economically justifiable. The Corporation mitigates most of the inherent market risk in foreign exchange contracts 
entered into on behalf of customers by taking offsetting positions and manages the remainder through individual foreign currency 
position limits and aggregate value-at-risk limits. These limits are established annually and reviewed quarterly. Market risk inherent 
in derivative instruments held or issued for risk management purposes is typically offset by changes in the fair value of the assets 
or liabilities being hedged.

Credit risk is the possible loss that may occur in the event of nonperformance by the counterparty to a financial instrument. 
The Corporation attempts to minimize credit risk arising from customer-initiated derivatives by evaluating the creditworthiness 
of each customer, adhering to the same credit approval process used for traditional lending activities and obtaining collateral as 
F-78

 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

deemed necessary. Derivatives with dealer counterparties are either cleared through a clearinghouse or settled directly with a single 
counterparty.  For  derivatives  settled  directly  with  dealer  counterparties,  the  Corporation  utilizes  counterparty  risk  limits  and 
monitoring procedures as well as master netting arrangements and bilateral collateral agreements to facilitate the management of 
credit risk. Master netting arrangements effectively reduce credit risk by permitting settlement of positive and negative positions 
and offset cash collateral held with the same counterparty on a net basis. Bilateral collateral agreements require daily exchange of 
cash or highly rated securities issued by the U.S. Treasury or other U.S. government entities to collateralize amounts due to either 
party beyond certain risk limits. At December 31, 2016, counterparties with bilateral collateral agreements had pledged $21 million
of marketable investment securities and deposited $144 million of cash with the Corporation to secure the fair value of contracts 
in an unrealized gain position, and the Corporation had pledged $9 million of investment securities and posted $47 million of cash 
as collateral for contracts in an unrealized loss position. For those counterparties not covered under bilateral collateral agreements, 
collateral is obtained, if deemed necessary, based on the results of management’s credit evaluation of the counterparty. Collateral 
varies, but may include cash, investment securities, accounts receivable, equipment or real estate. Included in the fair value of 
derivative instruments are credit valuation adjustments reflecting counterparty credit risk. These adjustments are determined by 
applying a credit spread for the counterparty or the Corporation, as appropriate, to the total expected exposure of the derivative. 
There were no derivative instruments with credit-risk-related contingent features that were in a liability position at December 31, 
2016. 

Derivative Instruments

Derivative instruments utilized by the Corporation are negotiated over-the-counter and primarily include swaps, caps 
and floors, forward contracts and options, each of which may relate to interest rates, energy commodity prices or foreign currency 
exchange rates. Swaps are agreements in which two parties periodically exchange cash payments based on specified indices applied 
to a specified notional amount until a stated maturity. Caps and floors are agreements which entitle the buyer to receive cash 
payments based on the difference between a specified reference rate or price and an agreed strike rate or price, applied to a specified 
notional amount until a stated maturity. Forward contracts are over-the-counter agreements to buy or sell an asset at a specified 
future date and price. Options are similar to forward contracts except the purchaser has the right, but not the obligation, to buy or 
sell the asset during a specified period or at a specified future date.

Over-the-counter contracts are tailored to meet the needs of the counterparties involved and, therefore, contain a greater 
degree of credit risk and liquidity risk than exchange-traded contracts, which have standardized terms and readily available price 
information. The Corporation reduces exposure to market and liquidity risks from over-the-counter derivative instruments entered 
into for risk management purposes, and transactions entered into to mitigate the market risk associated with customer-initiated 
transactions, by conducting hedging transactions with investment grade domestic and foreign financial institutions and subjecting 
counterparties to credit approvals, limits and collateral monitoring procedures similar to those used in making other extensions of 
credit. In addition, certain derivative contracts executed bilaterally with a dealer counterparty in the over-the-counter market are 
cleared through a clearinghouse, whereby the clearinghouse becomes the counterparty to the transaction.

F-79

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The  following  table  presents  the  composition  of  the  Corporation’s  derivative  instruments  held  or  issued  for  risk 
management purposes or in connection with customer-initiated and other activities at December 31, 2016 and 2015. The table 
excludes commitments and warrants accounted for as derivatives.

(in millions)
Risk management purposes

Derivatives designated as hedging instruments

Interest rate contracts:

Swaps - fair value - receive fixed/

pay floating

Derivatives used as economic hedges

Foreign exchange contracts:
Spot, forwards and swaps
Total risk management purposes
Customer-initiated and other activities

Interest rate contracts:

Caps and floors written
Caps and floors purchased
Swaps

Total interest rate contracts
Energy contracts:

Caps and floors written
Caps and floors purchased
Swaps

Total energy contracts
Foreign exchange contracts:

$

Spot, forwards, options and swaps

Total customer-initiated and other activities
Total gross derivatives
Amounts offset in the consolidated balance

sheets:

Netting adjustment - Offsetting derivative

assets/liabilities

Netting adjustment - Cash collateral

received/posted

Net derivatives included in the consolidated

balance sheets (b)

Amounts not offset in the consolidated balance

sheets:

Marketable securities received/pledged
under bilateral collateral agreements
Net derivatives after deducting amounts not
offset in the consolidated balance sheets

December 31, 2016

Fair Value

December 31, 2015

Fair Value

Notional/
Contract
Amount (a)

Gross
Derivative
Assets

Gross
Derivative
Liabilities

Notional/
Contract
Amount (a)

Gross
Derivative
Assets

Gross
Derivative
Liabilities

$

2,275

$

92

$

4

$

2,525

$

147

$

—

717
2,992

436
436
12,451
13,323

419
419
1,389
2,227

1,509
17,059
20,051

2
94

—
1
130
131

1
31
114
146

36
313
407

(84)

(47)

276

593
3,118

253
253
11,722
12,228

536
536
2,055
3,127

2,291
17,646
20,764

2
6

1
—
76
77

31
1
112
144

27
248
254

(84)

(45)

125

$

3
150

—
—
139
139

—
85
390
475

54
668
818

—
—

—
—
92
92

85
—
387
472

46
610
610

(127)

(291)

400

(127)

(3)

480

(19)

(8)

(137)

(3)

$

257

$

117

$

263

$

477

(a)  Notional or contractual amounts, which represent the extent of involvement in the derivatives market, are used to determine the contractual 
cash flows required in accordance with the terms of the agreement. These amounts are typically not exchanged, significantly exceed amounts 
subject to credit or market risk and are not reflected in the consolidated balance sheets.

(b)  Net derivative assets are included in “accrued income and other assets” and net derivative liabilities are included in “accrued expenses 
and other liabilities” on the consolidated balance sheets. Included in the fair value of net derivative assets and net derivative liabilities are 
credit valuation adjustments reflecting counterparty credit risk and credit risk of the Corporation. The fair value of net derivative assets 
included credit valuation adjustments for counterparty credit risk of $5 million at both December 31, 2016 and 2015.

Risk Management

As an end-user, the Corporation employs a variety of financial instruments for risk management purposes, including cash 
instruments, such as investment securities, as well as derivative instruments. Activity related to these instruments is centered 
predominantly in the interest rate markets and mainly involves interest rate swaps. Various other types of instruments also may 

F-80

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

be used to manage exposures to market risks, including interest rate caps and floors, total return swaps, foreign exchange forward 
contracts and foreign exchange swap agreements.

The Corporation entered into interest rate swap agreements related to medium- and long-term debt for interest rate risk 
management purposes. These interest rate swap agreements effectively modify the Corporation’s exposure to interest rate risk by 
converting fixed-rate debt to a floating rate. These agreements involve the receipt of fixed-rate interest amounts in exchange for 
floating-rate  interest  payments  over  the  life  of  the  agreement,  without  an  exchange  of  the  underlying  principal  amount.  Risk 
management  fair  value  interest  rate  swaps  generated  net  interest  income  of  $60  million  and  $70  million  for  the  years  ended 
December 31, 2016 and 2015, respectively. The Corporation recognized net losses of $2 million for the year ended December 31, 
2016 and net gains of $2 million for the year ended December 31, 2015 in "other noninterest income" in the consolidated statements 
of income for the ineffective portion of risk management derivative instruments designated as fair value hedges of fixed-rate debt.

Foreign  exchange  rate  risk  arises  from  changes  in  the  value  of  certain  assets  and  liabilities  denominated  in  foreign 
currencies. The Corporation employs spot and forward contracts in addition to swap contracts to manage exposure to these and 
other risks. The Corporation recognized an insignificant amount of net losses for each of the years ended December 31, 2016 and 
December 31, 2015 on risk management derivative instruments used as economic hedges in "other noninterest income" in the 
consolidated statements of income.

 The  following  table  summarizes  the  expected  weighted  average  remaining  maturity  of  the  notional  amount  of  risk 
management interest rate swaps and the weighted average interest rates associated with amounts expected to be received or paid 
on interest rate swap agreements as of December 31, 2016 and 2015.

(dollar amounts in millions)
December 31, 2016
Swaps - fair value - receive fixed/pay floating rate

Weighted Average

Notional
Amount

Remaining
Maturity
(in years)

Receive Rate

Pay Rate (a)

Medium- and long-term debt designation

$

2,275

December 31, 2015
Swaps - fair value - receive fixed/pay floating rate

Medium- and long-term debt designation

2,525

4.5

5.1

3.69%

1.80%

3.89

1.11

(a)  Variable rates paid on receive fixed swaps are based on six-month LIBOR rates in effect at December 31, 2016 and 2015.

Management believes these hedging strategies achieve the desired relationship between the rate maturities of assets and 
funding sources which, in turn, reduce the overall exposure of net interest income to interest rate risk, although there can be no 
assurance that such strategies will be successful.

Customer-Initiated and Other

The Corporation enters into derivative transactions at the request of customers and generally takes offsetting positions 
with dealer counterparties to mitigate the inherent market risk. Income primarily results from the spread between the customer 
derivative and the offsetting dealer position. 

For customer-initiated foreign exchange contracts where offsetting positions have not been taken, the Corporation manages 
the remaining inherent market risk through individual foreign currency position limits and aggregate value-at-risk limits. These 
limits are established annually and reviewed quarterly. For those customer-initiated derivative contracts which were not offset or 
where the Corporation holds a position within the limits described above, the Corporation recognized $1 million of net gains in 
“other noninterest income” in the consolidated statements of income for each of the years ended December 31, 2016 and 2015.

Fair values of customer-initiated and other derivative instruments represent the net unrealized gains or losses on such 
contracts and are recorded in the consolidated balance sheets. Changes in fair value are recognized in the consolidated statements 
of income. The net gains recognized in income on customer-initiated derivative instruments, net of the impact of offsetting positions, 
were as follows.

(in millions)
Years Ended December 31
Interest rate contracts
Energy contracts
Foreign exchange contracts

Total

Location of Gain
Other noninterest income
Other noninterest income
Foreign exchange income

$

$

F-81

2016

2015

25
2
41
68

$

$

16
2
37
55

 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Credit-Related Financial Instruments

The Corporation issues off-balance sheet financial instruments in connection with commercial and consumer lending 
activities. The Corporation’s credit risk associated with these instruments is represented by the contractual amounts indicated in 
the following table.

(in millions)
December 31
Unused commitments to extend credit:

Commercial and other
Bankcard, revolving check credit and home equity loan commitments
Total unused commitments to extend credit

Standby letters of credit
Commercial letters of credit

2016

2015

$

$
$

24,333
2,658
26,991
3,623
46

$

$
$

26,115
2,414
28,529
3,985
41

The  Corporation  maintains  an  allowance  to  cover  probable  credit  losses  inherent  in  lending-related  commitments, 
including unused commitments to extend credit, letters of credit and financial guarantees. At December 31, 2016 and 2015, the 
allowance for credit losses on lending-related commitments, included in “accrued expenses and other liabilities” on the consolidated 
balance sheets, was $41 million and $45 million, respectively. 

Unused Commitments to Extend Credit

Commitments to extend credit are legally binding agreements to lend to a customer, provided there is no violation of any 
condition established in the contract. These commitments generally have fixed expiration dates or other termination clauses and 
may  require  payment  of  a  fee.  Since  many  commitments  expire  without  being  drawn  upon,  the  total  contractual  amount  of 
commitments  does  not  necessarily  represent  future  cash  requirements  of  the  Corporation.  Commercial  and  other  unused 
commitments are primarily variable rate commitments. The allowance for credit losses on lending-related commitments included 
$29 million and $33 million at December 31, 2016 and 2015, respectively, for probable credit losses inherent in the Corporation’s 
unused commitments to extend credit.

Standby and Commercial Letters of Credit

Standby  letters  of  credit  represent  conditional  obligations  of  the  Corporation  which  guarantee  the  performance  of  a 
customer to a third party. Standby letters of credit are primarily issued to support public and private borrowing arrangements, 
including commercial paper, bond financing and similar transactions. Commercial letters of credit are issued to finance foreign 
or domestic trade transactions. These contracts expire in decreasing amounts through the year 2023. The Corporation may enter 
into participation arrangements with third parties that effectively reduce the maximum amount of future payments which may be 
required  under  standby  and  commercial  letters  of  credit. These  risk  participations  covered  $255  million  and  $287  million  at 
December 31, 2016 and 2015, respectively, of the $3.7 billion and $4.0 billion of standby and commercial letters of credit outstanding 
at December 31, 2016 and 2015, respectively.

The carrying value of the Corporation’s standby and commercial letters of credit, included in “accrued expenses and 
other liabilities” on the consolidated balance sheets, totaled $44 million at December 31, 2016, including $32 million in deferred 
fees and $12 million in the allowance for credit losses on lending-related commitments. At December 31, 2015, the comparable 
amounts were $49 million, $37 million and $12 million, respectively.

The following table presents a summary of criticized standby and commercial letters of credit at December 31, 2016 and 
December 31, 2015. The Corporation's criticized list is consistent with the Special mention, Substandard and Doubtful categories 
defined by regulatory authorities. The Corporation manages credit risk through underwriting, periodically reviewing and approving 
its credit exposures using Board committee approved credit policies and guidelines.

(dollar amounts in millions)
Total criticized standby and commercial letters of credit
As a percentage of total outstanding standby and commercial letters of credit

December 31, 2016
135
$
3.7%

December 31, 2015
110
$
2.7%

Other Credit-Related Financial Instruments

The Corporation enters into credit risk participation agreements, under which the Corporation assumes credit exposure 
associated with a borrower’s performance related to certain interest rate derivative contracts. The Corporation is not a party to the 
interest rate derivative contracts and only enters into these credit risk participation agreements in instances in which the Corporation 
is also a party to the related loan participation agreement for such borrowers. The Corporation manages its credit risk on the credit 
risk participation agreements by monitoring the creditworthiness of the borrowers, which is based on the normal credit review 
process had it entered into the derivative instruments directly with the borrower. The notional amount of such credit risk participation 
F-82

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

agreement reflects the pro-rata share of the derivative instrument, consistent with its share of the related participated loan. As of 
December 31, 2016 and 2015, the total notional amount of the credit risk participation agreements was approximately $458 million
and $559 million, respectively, and the fair value, included in customer-initiated interest rate contracts recorded in "accrued expenses 
and other liabilities" on the consolidated balance sheets, was insignificant for each period. The maximum estimated exposure to 
these agreements, as measured by projecting a maximum value of the guaranteed derivative instruments, assuming 100 percent 
default by all obligors on the maximum values, was approximately $3 million and $5 million at December 31, 2016 and 2015, 
respectively. In the event of default, the lead bank has the ability to liquidate the assets of the borrower, in which case the lead 
bank would be required to return a percentage of the recouped assets to the participating banks. As of December 31, 2016, the 
weighted average remaining maturity of outstanding credit risk participation agreements was 2.6 years.

NOTE 9 - VARIABLE INTEREST ENTITIES (VIEs)

The Corporation evaluates its interest in certain entities to determine if these entities meet the definition of a VIE and 
whether the Corporation is the primary beneficiary and should consolidate the entity based on the variable interests it held both 
at inception and when there is a change in circumstances that requires a reconsideration.

The Corporation holds ownership interests in funds in the form of limited partnerships or limited liability companies 
(LLCs)  investing  in  affordable  housing  projects  that  qualify  for  the  LIHTC. The  Corporation  also  directly  invests  in  limited 
partnerships and LLCs which invest in community development projects which generate similar tax credits to investors. As an 
investor, the Corporation obtains income tax credits and deductions from the operating losses of these tax credit entities. These 
tax credit entities meet the definition of a VIE; however, the Corporation is not the primary beneficiary of the entities, as the general 
partner or the managing member has both the power to direct the activities that most significantly impact the economic performance 
of the entities and the obligation to absorb losses or the right to receive benefits that could be significant to the entities.

The Corporation accounts for its interests in LIHTC entities using the proportional amortization method. Exposure to 
loss as a result of the Corporation’s involvement with LIHTC entities at December 31, 2016 was limited to approximately $414 
million. Ownership interests in other community development projects which generate similar tax credits to investors (other tax 
credit entities) are accounted for under either the cost or equity method. Exposure to loss as a result of the Corporation's involvement 
in other tax credit entities at December 31, 2016 was limited to approximately $8 million.

Investment balances, including all legally binding commitments to fund future investments, are included in “accrued 
income and other assets” on the consolidated balance sheets. A liability is recognized in “accrued expenses and other liabilities” 
on  the  consolidated  balance  sheets  for  all  legally  binding  unfunded  commitments  to  fund  tax  credit  entities  ($159  million  at 
December 31, 2016). Amortization and other write-downs of LIHTC investments are presented on a net basis as a component of 
the "provision for income taxes" on the consolidated statements of income, while amortization and write-downs of other tax credit 
investments are recorded in “other noninterest income." The income tax credits and deductions are recorded as a reduction of 
income tax expense and a reduction of federal income taxes payable.

The Corporation provided no financial or other support that was not contractually required to any of the above VIEs 

during the years ended December 31, 2016, 2015 and 2014.

The following table summarizes the impact of these tax credit entities on line items on the Corporation’s consolidated 

statements of income.

(in millions)
Years Ended December 31
Other noninterest income:

Amortization of other tax credit investments

Provision for income taxes:

Amortization of LIHTC Investments
Low income housing tax credits
Other tax benefits related to tax credit entities

Total provision for income taxes

2016

2015

2014

$

$

(1) $

66
(62)
(26)
(22) $

1

$

62
(61)
(22)
(21) $

(5)

60
(59)
(28)
(27)

For further information on the Corporation’s consolidation policy, see Note 1.

F-83

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 10 - DEPOSITS

At December 31, 2016, the scheduled maturities of certificates of deposit and other deposits with a stated maturity were 

as follows:

(in millions)
Years Ending December 31
2017
2018
2019
2020
2021
Thereafter
Total

A maturity distribution of domestic certificates of deposit of $100,000 and over follows:

(in millions)
December 31
Three months or less
Over three months to six months
Over six months to twelve months
Over twelve months

Total

2016

510
322
449
230
1,511

$

$

$

$

$

$

2,349
276
106
52
25
17
2,825

2015

532
385
659
537
2,113

The aggregate amount of domestic certificates of deposit that meet or exceed the current FDIC insurance limit of $250,000 
was $882 million and $1.4 billion at December 31, 2016 and 2015, respectively. All foreign office time deposits of $19 million
and $32 million at December 31, 2016 and 2015, respectively, were in denominations of $250,000 or more.

NOTE 11 - SHORT-TERM BORROWINGS

Federal funds purchased and securities sold under agreements to repurchase generally mature within one to four days 
from the transaction date. Other short-term borrowings, which may consist of borrowed securities and short-term notes, generally 
mature within one to 120 days from the transaction date. 

At December 31, 2016, Comerica Bank (the Bank), a wholly-owned subsidiary of the Corporation, had pledged loans 

totaling $23.0 billion which provided for up to $18.5 billion of available collateralized borrowing with the FRB.

F-84

 
  
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table provides a summary of short-term borrowings.

(dollar amounts in millions)
December 31, 2016

Amount outstanding at year-end
Weighted average interest rate at year-end
Maximum month-end balance during the year
Average balance outstanding during the year
Weighted average interest rate during the year

December 31, 2015

Amount outstanding at year-end
Weighted average interest rate at year-end
Maximum month-end balance during the year
Average balance outstanding during the year
Weighted average interest rate during the year

December 31, 2014

Amount outstanding at year-end
Weighted average interest rate at year-end
Maximum month-end balance during the year
Average balance outstanding during the year
Weighted average interest rate during the year

$

$

$

$

$

$

NOTE 12 - MEDIUM- AND LONG-TERM DEBT

Medium- and long-term debt is summarized as follows:

(in millions)
December 31
Parent company

Subordinated notes:

3.80% subordinated notes due 2026 (a)

Medium-term notes:

2.125% notes due 2019 (a)

Total parent company
Subsidiaries

Subordinated notes:

5.75% subordinated notes due 2016 (a) (b)
5.20% subordinated notes due 2017 (a)
4.00% subordinated notes due 2025 (a)
7.875% subordinated notes due 2026 (a)

Total subordinated notes
Medium-term notes:

2.50% notes due 2020 (a)

Federal Home Loan Bank (FHLB) advances:

Floating-rate based on FHLB auction rate due 2026

Other notes:

6.0% - 6.4% fixed-rate notes due 2018 to 2020

Federal Funds Purchased
and Securities Sold Under
Agreements to  Repurchase

Other
Short-term
Borrowings

$

$

$

$

$

$

25
0.54%
25
15
0.47%

23
0.38 %
109
93
0.05 %

116
0.04 %
238
200
0.04 %

2016

2015

$

256

$

348
604

—
511
347
215
1,073

667

2,800

—
—%
—
123
0.45%

—
— %
—
—
— %

—
— %
—
—
— %

259

349
608

659
530
351
223
1,763

671

—

Total subsidiaries
Total medium- and long-term debt
(a)  The  fixed  interest  rates  on  these  notes  have  been  swapped  to  a  variable  rate  and  designated  in  a  hedging  relationship.  
Accordingly, carrying value has been adjusted to reflect the change in the fair value of the debt as a result of changes in the 
benchmark rate.

$

$

16
4,556
5,160

16
2,450
3,058

(b)  The fixed interest rate on $250 million of $650 million total par value of these notes was swapped to a variable rate.

Subordinated notes with remaining maturities greater than one year qualify as Tier 2 capital. 

F-85

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The Bank is a member of the FHLB, which provides short- and long-term funding to its members through advances 
collateralized by real-estate related assets. In the second quarter 2016, the Bank borrowed $2.8 billion of 10-year, floating-rate 
FHLB advances due 2026. The interest rate on each of eight notes resets every four weeks, based on the FHLB auction rate, with 
the reset date of each note scheduled at one-week intervals. At December 31, 2016 the weighted-average rate on these advances 
was 0.6188%. Each note may be prepaid in full, without penalty, at each scheduled reset date. Proceeds were used for general 
corporate purposes. Actual borrowing capacity is contingent upon the amount of collateral available to be pledged to the FHLB.  
At December 31, 2016, $15.5 billion of real estate-related loans were pledged to the FHLB as blanket collateral for potential future 
borrowings of approximately $3.9 billion.

Unamortized debt issuance costs deducted from the carrying amount of medium- and long-term debt totaled $7 million

and $8 million at December 31, 2016 and 2015, respectively.

At December 31, 2016, the principal maturities of medium- and long-term debt were as follows:

(in millions)
Years Ending December 31
2017
2018
2019
2020
2021
Thereafter
Total

$

$

500
2
357
682
—
3,550
5,091

NOTE 13 - SHAREHOLDERS’ EQUITY

The Federal Reserve completed its 2016 Comprehensive Capital Analysis and Review (CCAR) in June 2016 and did not 
object to the Corporation's 2016/2017 capital plan and capital distributions contemplated in the plan for the period ending June 
30, 2017. The plan includes equity repurchases of up to $440 million for the four-quarter period commencing in the third quarter 
2016 and ending in the second quarter 2017. During the year ended December 31, 2016, the Corporation had repurchased $303 
million under the equity repurchase program.

Repurchases of common stock under the equity repurchase program authorized in 2010 by the Board of Directors of the 
Corporation totaled 6.6 million shares at an average price paid of $46.09 in 2016, 5.1 million shares at an average price paid of 
$45.65  per  share  in  2015  and  5.2  million  shares  at  an  average  price  paid  of  $47.91  per  share  in  2014. The  Corporation  also 
repurchased 500,000 warrants at an average price paid of $20.70 in 2015. There is no expiration date for the Corporation's equity 
repurchase program.

At December 31, 2016, the Corporation had 4.8 million warrants outstanding to purchase 3.9 million common shares at 
a  weighted-average  exercise  price  of  $29.47.  Outstanding  warrants  were  exercisable  at  the  date  of  grant  and  expire  in  2018. 
Approximately 2.3 million, 934,000 and 361,000 shares of common stock were issued upon exercise of warrants in 2016, 2015 
and 2014, respectively. 

At December 31, 2016, the Corporation had 3.9 million shares of common stock reserved for warrant exercises, 7.9 
million shares of common stock reserved for stock option exercises and restricted stock unit vesting and 1.6 million shares of 
restricted stock outstanding to employees and directors under share-based compensation plans.

F-86

 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 14 - ACCUMULATED OTHER COMPREHENSIVE LOSS

The following table presents a reconciliation of the changes in the components of accumulated other comprehensive loss 
and details the components of other comprehensive income (loss) for the years ended December 31, 2016, 2015 and 2014, including 
the amount of income tax expense (benefit) allocated to each component of other comprehensive income (loss).

(in millions)
Years Ended December 31

2016

2015

2014

Accumulated net unrealized gains (losses) on investment securities:

Balance at beginning of period, net of tax

$

9

$

37

$

(70)
(26)
(44)

—
—

—

(3)
(1)

(55)
(21)
(34)

(2)
(1)

(1)

(8)
(3)

(2)
(42)
(33) $

(5)
(28)
9

$

(438) $

(449) $

(134)
234

100
37

63

46
(7)
39
14

25

(57)
3

(54)
(19)

(35)

70
1
71
25

46

(68)

166
60
106

1
—

1

—
—

—
105
37

(323)

(240)
—

(240)
(87)

(153)

39
3
42
15

27

88
(350) $
(383) $

11
(438) $
(429) $

(126)
(449)
(412)

Net unrealized holding (losses) gains arising during the period
Less:  (Benefit) provision for income taxes

Net unrealized holding (losses) gains arising during the period, net of tax

Less:

Net realized (losses) gains included in net securities (losses) gains
Less:  Benefit for income taxes

Reclassification adjustment for net securities (losses) gains included in net

income, net of tax

Less:

Net losses realized as a yield adjustment in interest on investment securities
Less:  Benefit for income taxes

Reclassification adjustment for net losses realized as a yield adjustment

included in net income, net of tax

Change in net unrealized (losses) gains on investment securities, net of tax

Balance at end of period, net of tax

Accumulated defined benefit pension and other postretirement plans

adjustment:
Balance at beginning of period, net of tax

Actuarial loss arising during the period
Prior service credit arising during the period

Net defined benefit pension and other postretirement adjustment arising

during the period

Less:  Provision (benefit) for income taxes

Net defined benefit pension and other postretirement adjustment arising

during the period, net of tax

Amounts recognized in salaries and benefits expense:

Amortization of actuarial net loss
Amortization of prior service (credit) cost

Total amounts recognized in salaries and benefits expense
Less: Provision for income taxes

Adjustment for amounts recognized as components of net periodic benefit

cost during the period, net of tax

Change in defined benefit pension and other postretirement plans adjustment,

net of tax

Balance at end of period, net of tax

Total accumulated other comprehensive loss at end of period, net of tax

$

$

$
$

F-87

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 15 - NET INCOME PER COMMON SHARE

Basic and diluted net income per common share are presented in the following table.

(in millions, except per share data)
Years Ended December 31
Basic and diluted

Net income

Less income allocated to participating securities

Net income attributable to common shares

Basic average common shares

Basic net income per common share

Basic average common shares
Dilutive common stock equivalents:

Net effect of the assumed exercise of stock options
Net effect of the assumed exercise of warrants

Diluted average common shares

Diluted net income per common share

2016

2015

2014

$

$

$

$

$

$

477
4
473

172

$

$

521
6
515

176

2.74

$

2.93

$

172

2
3
177

176

2
3
181

2.68

$

2.84

$

593
7
586

179

3.28

179

2
4
185

3.16

The following average shares related to outstanding options to purchase shares of common stock were not included in 
the computation of diluted net income per common share because the prices of the options and warrants were greater than the 
average market price of common shares for the period.

(shares in millions)
Years Ended December 31
Average outstanding options
Range of exercise prices

NOTE 16 - SHARE-BASED COMPENSATION 

2016
3.3
$37.26 - $59.86

2015
5.1
$46.68 - $60.82

2014
7.2
$47.24 - $61.94

Share-based compensation expense is charged to “salaries and benefits” expense on the consolidated statements of income. 
The components of share-based compensation expense for all share-based compensation plans and related tax benefits are as 
follows.

(in millions)
Years Ended December 31
Total share-based compensation expense

Related tax benefits recognized in net income

2016

2015

2014

$

$

34

13

$

$

38

14

$

$

38

14

The following table summarizes unrecognized compensation expense for all share-based plans:

(dollar amounts in millions)
Total unrecognized share-based compensation expense

Weighted-average expected recognition period (in years)

December 31, 2016

$

43

2.9

The Corporation has share-based compensation plans under which it awards shares of restricted stock and restricted stock 
units to executive officers, directors and key personnel, and stock options to executive officers and key personnel of the Corporation 
and its subsidiaries. Restricted stock vests over periods ranging from three years to five years, restricted stock units vest over 
periods ranging from one year to three years, and stock options vest over periods ranging from one year to four years. The maturity 
of each option is determined at the date of grant; however, no options may be exercised later than ten years from the date of grant. 
The options may have restrictions regarding exercisability. The plans originally provided for a grant of up to 19.4 million common 
shares,  plus  shares  under  certain  plans  that  are  forfeited,  expire  or  are  canceled,  which  become  available  for  re-grant. At 
December 31, 2016, 10.2 million shares were available for grant.

F-88

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The Corporation used a binomial model to value stock options granted in the periods presented. Option valuation models 
require several inputs, including the expected stock price volatility, and changes in input assumptions can materially affect the fair 
value estimates. The model used may not necessarily provide a reliable single measure of the fair value of employee and director 
stock options. The risk-free interest rate assumption used in the binomial option-pricing model as outlined in the table below was 
based on the federal ten-year treasury interest rate. The expected dividend yield was based on the historical and projected dividend 
yield patterns of the Corporation’s common shares. Expected volatility assumptions considered both the historical volatility of the 
Corporation’s common stock over a ten-year period and implied volatility based on actively traded options on the Corporation’s 
common stock with pricing terms and trade dates similar to the stock options granted. Expected option life was based on historical 
exercise activity over the contractual term of the option grant (10 years), excluding certain forced transactions.

The  estimated  weighted-average  grant-date  fair  value  per  option  and  the  underlying  binomial  option-pricing  model 

assumptions are summarized in the following table:

Years Ended December 31
Weighted-average grant-date fair value per option
Weighted-average assumptions:
 Risk-free interest rates
 Expected dividend yield
Expected volatility factors of the market price of
   Comerica common stock
Expected option life (in years)

2016

2015

2014

$

9.94

$

11.31

$

13.21

2.01%
3.00

38
6.9

1.83%
3.00

33
6.9

2.95%
3.00

31
5.8

A summary of the Corporation’s stock option activity and related information for the year ended December 31, 2016

follows:

Weighted-Average

Number of
Options
(in thousands)

Exercise Price
per Share

Remaining
Contractual
Term (in years)

Aggregate
Intrinsic Value
(in millions)

Outstanding-January 1, 2016

Granted
Forfeited or expired
Exercised

Outstanding-December 31, 2016
Outstanding, net of expected forfeitures-

December 31, 2016

Exercisable-December 31, 2016

$

11,792
1,137
(2,121)
(3,916)
6,892

6,472
4,490

42.92
32.97
54.74
43.63
37.24

37.31
36.66

5.4

$

5.3
4.0

213

199
141

The aggregate intrinsic value of outstanding options shown in the table above represents the total pretax intrinsic value 

at December 31, 2016, based on the Corporation’s closing stock price of $68.11 at December 31, 2016.

The total intrinsic value of stock options exercised was $46 million, $12 million and $23 million for the years ended 

December 31, 2016, 2015 and 2014, respectively. 

A summary of the Corporation’s restricted stock activity and related information for the year ended December 31, 2016

follows:

Outstanding-January 1, 2016

Granted
Forfeited
Vested

Outstanding-December 31, 2016

F-89

Number of
Shares
(in thousands)

Weighted-Average
Grant-Date Fair 
Value per Share

1,910
574
(267)
(626)
1,591

$

$

37.41
33.41
36.99
34.45
37.20

 
 
 
  
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The total fair value of restricted stock awards that fully vested was $22 million for the year ended December 31, 2016

and $18 million for each of the years ended December 31, 2015 and 2014.

A summary of the Corporation's restricted stock unit activity and related information for the year ended December 31, 

2016 follows:

Outstanding-January 1, 2016

Granted
Converted
Forfeited
Vested

Outstanding-December 31, 2016

Service-Based Units

Performance-Based Units

Number of
Units
(in thousands)

Weighted-Average
Grant-Date Fair 
Value per Share

Number of
Units
(in thousands)

Weighted-Average
Grant-Date Fair 
Value per Share

$

413
19
34
(12)
(285)
169

34.77
44.90
33.79
26.69
33.18
38.97

$

510
362
(34)
(46)
—
792

44.89
32.85
33.79
40.19
—
40.14

The total fair value of restricted stock units that fully vested was $11 million for the year ended December 31, 2016. 

There were no restricted stock units that vested for each of the years ended December 31, 2015 and 2014.

The Corporation expects to satisfy the exercise of stock options, the vesting of restricted stock units and future grants of 
restricted stock by issuing shares of common stock out of treasury. At December 31, 2016, the Corporation held 52.9 million shares 
in treasury.

For further information on the Corporation’s share-based compensation plans, refer to Note 1.

NOTE 17 - EMPLOYEE BENEFIT PLANS

Defined Benefit Pension and Postretirement Benefit Plans

The Corporation has a qualified and a non-qualified defined benefit pension plan. Through December 31, 2016, the plans 
provided  benefits  for  substantially  all  salaried  employees  hired  before  January 1,  2007  who  continued  to  meet  the  eligibility 
requirements of the plans. Through December 31, 2016, benefits under the defined benefit plans were based primarily on years of 
service, age and compensation during the five highest paid consecutive calendar years occurring during the last ten years before 
retirement. Salaries and benefits expense included defined benefit pension expense of $6 million, $47 million and $39 million in 
the years ended December 31, 2016, 2015 and 2014, respectively, for the plans.

In October 2016, the Corporation modified the qualified and non-qualified defined benefit pension plans to freeze final 
average pay benefits as of December 31, 2016, other than for participants who were age 60 or older as of December 31, 2016, and 
added a cash balance plan provision effective January 1, 2017. Active pension plan participants 60 years or older as of December 
31, 2016 receive the greater of the final average pay formula or the frozen final average pay benefit as of December 31, 2016 plus 
the cash balance benefit earned after January 1, 2017. Employees participating in the retirement account plan as of December 31, 
2016 are eligible to participate in the cash balance pension plan effective January 1, 2017. Benefits earned under the cash balance 
pension formula, in the form of an account balance, include contribution credits based on eligible pay earned each month, age and 
years of service and monthly interest credits based on the 30-year Treasury rate.

The Corporation’s postretirement benefit plan continues to provide postretirement health care and life insurance benefits 
for retirees as of December 31, 1992. The plan also provides certain postretirement health care and life insurance benefits for a 
limited number of retirees who retired prior to January 1, 2000. For all other employees hired prior to January 1, 2000, a nominal 
benefit is provided. Employees hired on or after January 1, 2000 and prior to January 1, 2007 are eligible to participate in the plan 
on a full contributory basis until Medicare-eligible based on age and service. Employees hired on or after January 1, 2007 are not 
eligible  to  participate  in  the  plan. The  Corporation  funds  the  pre-1992  retiree  plan  benefits  with  bank-owned  life  insurance. 
Employee benefits expense included no postretirement benefit expense in the year ended December 31, 2016 and $1 million in 
each of the years ended December 31, 2015 and 2014.

F-90

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table sets forth reconciliations of plan assets and the projected benefit obligation, the weighted-average 
assumptions used to determine year-end benefit obligations, and the amounts recognized in accumulated other comprehensive 
income (loss) for the Corporation’s defined benefit pension plans and postretirement benefit plan at December 31, 2016 and 2015. 
The Corporation used a measurement date of December 31, 2016 for these plans.

(dollar amounts in millions)
Change in fair value of plan assets:
Fair value of plan assets at January 1
Actual return on plan assets
Employer contributions
Benefits paid
Fair value of plan assets at December 31
Change in projected benefit obligation:
Projected benefit obligation at January 1
Service cost
Interest cost
Actuarial loss (gain)
Benefits paid
Plan change
Projected benefit obligation at December 31
Accumulated benefit obligation
Funded status at December 31 (b) (c)
Weighted-average assumptions used:
Discount rate
Rate of compensation increase
Healthcare cost trend rate:

Cost trend rate assumed for next year
Rate to which the cost trend rate is assumed to

decline (the ultimate trend rate)

Year when rate reaches the ultimate trend rate

Amounts recognized in accumulated other

comprehensive income (loss) before income
taxes:

Defined Benefit Pension Plans

Qualified

2016

2015

Non-Qualified
2016

2015

Postretirement
Benefit Plan

2016

2015

$ 2,346
200
—
(93)
$ 2,453

$ 1,916
31
87
161
(93)
(200)
$ 1,902
$ 1,894
551
$

$ 2,541
(73)
—
(122)
$ 2,346

$ 2,070
35
88
(155)
(122)
—
$ 1,916
$ 1,756
430
$

(a)

(a)

$ — $ — $

—
—
—

—
—
—

$ — $ — $

$ 222
3
10
11
(11)
(34)
$ 201
$ 198
$ (201)

$ 235
4
10
(16)
(11)
—
$ 222
$ 191
$ (222)

$

$
$
$

61
2
4
(5)
62

59
—
3
(2)
(5)
—
55
55
7

$

$

$

$
$
$

67
—
—
(6)
61

73
—
3
(8)
(6)
(3)
59
59
2

4.23%
3.50

4.82%
3.75

4.23% 4.82%
3.50

3.75

3.92%
n/a

4.53%
n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

6.50

5.00

7.00

5.00

2027

2027

Net actuarial loss
Prior service credit (cost)
Balance at December 31
(a)  Included $56 million in benefit payments made to certain terminated vested eligible participants who elected to receive lump-sum settlements 

$ (586)
(21)
$ (607)

$ (673)
178
$ (495)

(22)
1
(21)

(82)
50
(32)

(20)
1
(19)

(78)
21
(57)

$

$

$

$

$

$

$

$

in 2015.

(b)  Based on projected benefit obligation for defined benefit pension plans and accumulated benefit obligation for postretirement benefit plan.
(c)  The Corporation recognizes the overfunded and underfunded status of the plans in “accrued income and other assets” and “accrued 

expenses and other liabilities,” respectively, on the consolidated balance sheets.

n/a - not applicable

Because the non-qualified defined benefit pension plan has no assets, the accumulated benefit obligation exceeded the 

fair value of plan assets for the non-qualified defined benefit pension plan at December 31, 2016 and December 31, 2015. 

F-91

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following table details the changes in plan assets and benefit obligations recognized in other comprehensive income 

(loss) for the year ended December 31, 2016.

(in millions)
Actuarial (loss) gain arising during the period
Prior service credit arising during the period
Amortization of net actuarial loss
Amortization of prior service credit
Total recognized in other comprehensive income

Defined Benefit Pension Plans

Qualified

Non-Qualified

Postretirement
Benefit Plan

Total

$

$

(124) $
200
38
(2)
112

$

(11) $
34
7
(5)
25

$

1
—
1
—
2

$

$

(134)
234
46
(7)
139

Components of net periodic defined benefit cost and postretirement benefit cost, the actual return on plan assets and the 

weighted-average assumptions used were as follows.

Defined Benefit Pension Plans

2014

2016

Non-Qualified
2015

2014

(dollar amounts in millions)
Years Ended December 31
Service cost
Interest cost
Expected return on plan assets
Amortization of prior service (credit) cost
Amortization of net loss
Net periodic defined benefit (credit) cost
Actual return on plan assets
Actual rate of return on plan assets
Weighted-average assumptions used:
Discount rate
Expected long-term return on plan assets
Rate of compensation increase
n/a - not applicable

$

$
$

2016

31
87
(163)
(2)
38
(9)
200
8.66%

4.53%
6.75
3.75

Qualified
2015
35
88
(159)
4
59
27
(73)
(2.95)%

$

$
$

4.28 %
6.75
3.75

$

$
$

29
88
(131)
6
31
23
278
13.88%

5.17%
6.75
4.00

(dollar amounts in millions)
Years Ended December 31
Interest cost
Expected return on plan assets
Amortization of prior service cost
Amortization of net loss
Net periodic postretirement benefit cost
Actual return on plan assets
Actual rate of return on plan assets
Weighted-average assumptions used:
Discount rate
Expected long-term return on plan assets
Healthcare cost trend rate:
Cost trend rate assumed
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)
Year that the rate reaches the ultimate trend rate

$

$

$

$
$

$

$

3
10
—
(5)
7
15
n/a
n/a

$

$

4
10
—
(4)
10
20
n/a
n/a

3
10
—
(4)
7
16
n/a
n/a

4.53%
n/a

3.75

4.28%
n/a

3.75

5.17%
n/a

4.00

2014

2016

$

$

Postretirement Benefit Plan
2015
3
(4)
1
1
1

3
(4)
—
1
— $
2
$
2.83%

$
— $

(0.53)%

3.99 %
5.00

7.00
5.00

2026

4.53%
5.00

7.00
5.00
2027

3
(4)
1
1
1
3
4.62%

4.59%
5.00

7.50
5.00
2033

The expected long-term rate of return of plan assets is the average rate of return expected to be realized on funds invested 
or expected to be invested over the life of the plan, which has an estimated duration of approximately 12 years as of December 31, 
2016. The expected long-term rate of return on plan assets is set after considering both long-term returns in the general market 
and long-term returns experienced by the assets in the plan. The returns on the various asset categories are blended to derive one 
long-term rate of return. The Corporation reviews its pension plan assumptions on an annual basis with its actuarial consultants 
to determine if assumptions are reasonable and adjusts the assumptions to reflect changes in future expectations.

F-92

 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The estimated portion of balances remaining in accumulated other comprehensive income (loss) that are expected to be 

recognized as a component of net periodic benefit cost in the year ended December 31, 2017 are as follows.

(in millions)
Net loss
Prior service credit

Defined Benefit Pension Plans

Qualified

$

43
(19)

Non-Qualified
8
$
(8)

Postretirement
Benefit Plan

Total

$

$

1
—

52
(27)

Assumed healthcare cost trend rates have a significant effect on the amounts reported for the postretirement benefit plan. 
A one-percentage-point change in 2016 assumed healthcare and prescription drug cost trend rates would have the following effects.

(in millions)
Effect on postretirement benefit obligation
Effect on total service and interest cost

Plan Assets

One-Percentage-Point

Increase

Decrease

$

$

3
—

(3)
—

The Corporation’s overall investment goals for the qualified defined benefit pension plan are to maintain a portfolio of 
assets  of  appropriate  liquidity  and  diversification;  to  generate  investment  returns  (net  of  operating  costs)  that  are  reasonably 
anticipated to maintain the plan’s fully funded status or to reduce a funding deficit, after taking into account various factors, 
including reasonably anticipated future contributions and expense and the interest rate sensitivity of the plan’s assets relative to 
that of the plan’s liabilities; and to generate investment returns (net of operating costs) that meet or exceed a customized benchmark 
as defined in the plan investment policy. Derivative instruments are permissible for hedging and transactional efficiency, but only 
to the extent that the derivative use enhances the efficient execution of the plan’s investment policy. The plan does not directly 
invest in securities issued by the Corporation and its subsidiaries. The Corporation’s target allocations for plan investments are 45 
percent to 55 percent for both equity securities and fixed income, including cash. Equity securities include collective investment 
and mutual funds and common stock. Fixed income securities include U.S. Treasury and other U.S. government agency securities, 
mortgage-backed securities, corporate bonds and notes, municipal bonds, collateralized mortgage obligations and money market 
funds.

Fair Value Measurements

The Corporation’s qualified defined benefit pension plan utilizes fair value measurements to record fair value adjustments 
and to determine fair value disclosures. The Corporation’s qualified benefit pension plan categorizes investments recorded at fair 
value into a three-level hierarchy, based on the markets in which the investment are traded and the reliability of the assumptions 
used to determine fair value. Refer to Note 1 for a description of the three-level hierarchy.

In May 2015, the FASB issued ASU No. 2015-07, "Disclosure for Investments in Certain Entities That Calculate Net 
Asset Value per Share" (ASU 2015-07). ASU 2015-07 removes the requirement to present certain investments for which the 
practical expedient is used to measure fair value at net asset value (NAV) within the fair value hierarchy. Instead, these investments 
are included to permit reconciliation of the fair value hierarchy to the fair value investment balance on the consolidated balance 
sheets. The provisions of ASU 2015-07 were retrospectively applied. 

Following is a description of the valuation methodologies and key inputs used to measure the fair value of the Corporation’s 
qualified defined benefit pension plan investments, including an indication of the level of the fair value hierarchy in which the 
investments are classified.

Mutual funds

Fair value measurement is based upon the NAV provided by the administrator of the fund. Mutual fund NAVs are quoted 

in an active market exchange, such as the New York Stock Exchange, and are included in Level 1 of the fair value hierarchy.

Commercial paper

Fair value measurement is based on benchmark yields and quotes from market makers and other broker/dealers recognized 

to be market participants. Commercial paper is included in Level 2 of the fair value hierarchy.

F-93

 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Common stock

Fair value measurement is based upon the closing price quoted in an active market exchange, such as the New York Stock 
Exchange. Level 1 common stock includes domestic and foreign stock and real estate investment trusts. The fair value of American 
Depository Receipts is based upon independent pricing models utilizing primarily observable inputs, generally the quoted prices 
for the underlying securities, and is included in Level 2 of the fair value hierarchy.

U.S. Treasury and other U.S. government agency securities

Fair value measurement is based upon quoted prices in an active market exchange, such as the New York Stock Exchange. 

Level 1 securities include U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets.

Corporate and municipal bonds and notes

Fair value measurement is based upon quoted prices of securities with similar characteristics or pricing models based on 
observable market data inputs, primarily interest rates, spreads and prepayment information. Level 2 securities include corporate 
bonds, municipal bonds, foreign bonds and foreign notes.

Collateralized mortgage obligations and U.S. government agency mortgage-backed securities 

Fair value measurement is based upon independent pricing models or other model-based valuation techniques such as 
the present value of future cash flows, adjusted for the security's credit rating, prepayment assumptions and other factors, such as 
credit loss and liquidity assumptions, and are included in Level 2 of the fair value hierarchy.

Private placements

Fair value is measured using the NAV provided by fund management as quoted prices in active markets are not available. 
Management considers additional discounts to the provided NAV for market and credit risk. Private placements are included in 
Level 3 of the fair value hierarchy.

 Collective investment funds

Fair value measurement is based upon the net asset value (NAV) provided by the administrator of the fund as a practical 
expedient to estimate fair value. There are no unfunded commitments or redemption restrictions on the collective investment funds. 
The investments are redeemable daily. 

F-94

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

 Fair Values

The  fair  values  of  the  Corporation’s  qualified  defined  benefit  pension  plan  investments  measured  at  fair  value  on  a 
recurring basis at December 31, 2016 and 2015, by asset category and level within the fair value hierarchy, are detailed in the table 
below.

(in millions)
December 31, 2016
Cash equivalent securities:
     Commercial paper
Common stock
Fixed income securities:

U.S. Treasury and other U.S. government agency securities
Corporate and municipal bonds and notes
Collateralized mortgage obligations
U.S. government agency mortgage-backed securities

Private placements
Total investments in the fair value hierarchy

Investments measured at net asset value:

Collective investment funds
Total investments at fair value

December 31, 2015
Cash equivalent securities:

Mutual funds
Equity securities:
Mutual funds
Common stock

Fixed income securities:

U.S. Treasury and other U.S. government agency securities
Corporate and municipal bonds and notes
Collateralized mortgage obligations
U.S. government agency mortgage-backed securities

Private placements
Total investments in the fair value hierarchy

Investments measured at net asset value:

   Collective investment funds
Total investments at fair value

Total

Level 1

Level 2

Level 3

$

$

$

$

$

2
850

— $
850

$

2
—

377
—
—
—
—
1,227

—
709
15
8
—
734

377
709
15
8
71
2,032

416
2,448

43

$

43

$

— $

69
478

368
—
—
—
—
958

—
2

—
729
18
8
—
757

69
480

368
729
18
8
105
1,820

527
2,347

—
—

—
—
—
—
71
71

—

—
—

—
—
—
—
105
105

The table below provides a summary of changes in the Corporation’s qualified defined benefit pension plan’s Level 3 

investments measured at fair value on a recurring basis for the years ended December 31, 2016 and 2015.

(in millions)
Year Ended December 31, 2016
Private placements
Year Ended December 31, 2015
Private placements

Balance at
Beginning
of Period

Net Gains (Losses)

Realized

Unrealized

Purchases

Sales

Balance at
End of Period

$

$

105

73

$

$

1

$

3

$

— $

(5) $

64

108

$

$

(102) $

(71) $

71

105

There were no assets in the non-qualified defined benefit pension plan at December 31, 2016 and 2015. The postretirement 
benefit plan is fully invested in bank-owned life insurance policies. The fair value of bank-owned life insurance policies is based 
on the cash surrender values of the policies as reported by the insurance companies and is classified in Level 2 of the fair value 
hierarchy.

F-95

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

Cash Flows

The Corporation currently expects to make no employer contributions to the qualified and non-qualified defined benefit 

pension plans and postretirement benefit plan for the year ended December 31, 2017.

Estimated Future Benefit Payments

(in millions)
Years Ended December 31
2017
2018
2019
2020
2021
2022 - 2026
(a)  Estimated benefit payments in the postretirement benefit plan are net of estimated Medicare subsidies.

120
119
124
126
129
657

$

$

Qualified
Defined Benefit
Pension Plan

Non-Qualified
Defined Benefit
Pension Plan

Postretirement
Benefit Plan (a)
6
$
6
6
5
5
21

11
12
12
13
13
65

Defined Contribution Plans

Substantially  all  of  the  Corporation’s  employees  are  eligible  to  participate  in  the  Corporation’s  principal  defined 
contribution plan (a 401(k) plan). Under this plan, the Corporation makes core matching cash contributions of 100 percent of the 
first 4 percent of qualified earnings contributed by employees (up to the current IRS compensation limit), invested based on 
employee investment elections. Employee benefits expense included expense for the plan of $22 million for each of the years 
ended December 31, 2016, 2015, and 2014.

Through December 31, 2016, the Corporation also provided a retirement account plan for the benefit of substantially all 
employees who worked at least 1,000 hours in a plan year and were not accruing a benefit in the defined benefit pension plan. 
Under the retirement account plan, the Corporation made an annual discretionary allocation to the individual account of each 
eligible employee ranging from 3 percent to 8 percent of annual compensation, determined based on combined age and years of 
service.  The  allocations  were  invested  based  on  employee  investment  elections.  The  Corporation  recognized  $10  million  in 
employee benefits expense for this plan for each of the years ended December 31, 2016, 2015, and 2014. Employees participating 
in the retirement account plan as of December 31, 2016 are eligible to participate in the cash balance pension plan effective January 
1, 2017. Final retirement account plan balances will be transferred to the Corporation's 401(k) plan in the first quarter of 2017. 
Contributions to the retirement account plan will cease for periods beginning after December 31, 2016.

Deferred Compensation Plans

The Corporation offers optional deferred compensation plans under which certain employees may make an irrevocable 
election to defer incentive compensation and/or a portion of base salary until retirement or separation from the Corporation. The 
employee may direct deferred compensation into one or more deemed investment options. Although not required to do so, the 
Corporation invests actual funds into the deemed investments as directed by employees, resulting in a deferred compensation asset, 
recorded in “other short-term investments” on the consolidated balance sheets that offsets the liability to employees under the plan, 
recorded in “accrued expenses and other liabilities.” The earnings from the deferred compensation asset are recorded in “interest 
on short-term investments” and “other noninterest income” and the related change in the liability to employees under the plan is 
recorded in “salaries” expense on the consolidated statements of income.

NOTE 18 - INCOME TAXES AND TAX-RELATED ITEMS

The provision for income taxes is calculated as the sum of income taxes due for the current year and deferred taxes. 
Income taxes due for the current year is computed by applying federal and state tax statutes to current year taxable income. Deferred 
taxes arise from temporary differences between the income tax basis and financial accounting basis of assets and liabilities. Tax-
related interest and penalties and foreign taxes are then added to the tax provision.

F-96

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The current and deferred components of the provision for income taxes were as follows:

(in millions)
December 31
Current:

Federal
Foreign
State and local

Total current

Deferred:
Federal
State and local

Total deferred
Total

2016

2015

2014

$

$

224
5
15
244

(49)
(2)
(51)
193

$

$

275
5
20
300

(68)
(3)
(71)
229

$

$

127
6
14
147

123
7
130
277

Income before income taxes of $670 million for the year ended December 31, 2016 included $18 million of foreign-

source income.

The income tax provision on securities transactions for the years ended December 31, 2016 and 2015 were benefits of 
$2 million and $1 million, respectively. There was no tax provision on securities transactions for the year ended December 31, 
2014.

The provision for income taxes does not reflect the tax effects of unrealized gains and losses on investment securities 
available-for-sale or the change in defined benefit pension and other postretirement plans adjustment included in accumulated 
other comprehensive loss. Refer to Note 14 for additional information on accumulated other comprehensive loss.

The income tax effects of transactions under the Corporation's share-based compensation plans reduced both shareholders’ 

equity and deferred tax assets by $9 million, $12 million and $11 million in 2016, 2015, and 2014 respectively.

A reconciliation of expected income tax expense at the federal statutory rate to the Corporation’s provision for income 

taxes and effective tax rate follows:

(dollar amounts in millions)
Years Ended December 31
Tax based on federal statutory rate
State income taxes
Affordable housing and historic credits
Bank-owned life insurance
Other changes in unrecognized tax benefits
Lease termination transactions
Tax-related interest and penalties
Other
Provision for income taxes

2016

2015

2014

Amount

Rate

Amount

Rate

Amount

Rate

$

$

235
8
(22)
(15)
—
(15)
3
(1)
193

35.0% $
1.2
(3.3)
(2.3)
—
(2.2)
0.5
(0.1)
28.8% $

262
10
(22)
(15)
—
(5)
1
(2)
229

35.0% $
1.3
(2.9)
(2.0)
—
(0.7)
0.1
(0.3)
30.5% $

305
13
(24)
(15)
2
—
(3)
(1)
277

35.0%
1.5
(2.8)
(1.7)
0.2
—
(0.3)
(0.1)
31.8%

The liability for tax-related interest and penalties included in “accrued expenses and other liabilities” on the consolidated 

balance sheets was $7 million and $3 million at December 31, 2016 and 2015, respectively.

In the ordinary course of business, the Corporation enters into certain transactions that have tax consequences. From time 
to time, the Internal Revenue Service (IRS) may review and/or challenge specific interpretive tax positions taken by the Corporation 
with respect to those transactions. The Corporation believes that its tax returns were filed based upon applicable statutes, regulations 
and case law in effect at the time of the transactions. The IRS, an administrative authority or a court, if presented with the transactions, 
could disagree with the Corporation’s interpretation of the tax law.

A reconciliation of the beginning and ending amount of net unrecognized tax benefits follows:

(in millions)
Balance at January 1

Increases as a result of tax positions taken during a prior period
Decrease related to settlements with tax authorities

Balance at December 31

2016

2015

2014

$

$

22
—
(7)
15

$

$

14
8
—
22

$

$

11
3
—
14

F-97

 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The Corporation anticipates that it is reasonably possible that settlements with tax authorities will result in an $8 million

decrease in net unrecognized tax benefits within the next twelve months.

 After consideration of the effect of the federal tax benefit available on unrecognized state tax benefits, the total amount 
of unrecognized tax benefits that, if recognized, would affect the Corporation’s effective tax rate was approximately $4 million at  
both December 31, 2016 and December 31, 2015.

The following tax years for significant jurisdictions remain subject to examination as of December 31, 2016:

Jurisdiction
Federal
California

Tax Years
2013-2015
2004-2015

Based on current knowledge and probability assessment of various potential outcomes, the Corporation believes that 
current tax reserves are adequate, and the amount of any potential incremental liability arising is not expected to have a material 
adverse effect on the Corporation’s consolidated financial condition or results of operations. Probabilities and outcomes are reviewed 
as events unfold, and adjustments to the reserves are made when necessary.

The principal components of deferred tax assets and liabilities were as follows:

(in millions)
December 31
Deferred tax assets:

Allowance for loan losses
Deferred compensation
Deferred loan origination fees and costs
Net unrealized losses on investment securities available-for-sale
Other temporary differences, net

Total deferred tax asset before valuation allowance

Valuation allowance

Total deferred tax assets

Deferred tax liabilities:

Lease financing transactions
Defined benefit plans
Net unrealized gains on investment securities available-for-sale
Allowance for depreciation

Total deferred tax liabilities
Net deferred tax asset

2016

2015

$

$

256
91
20
20
76
463
(3)
460

(150)
(82)
—
(11)
(243)
217

$

$

223
113
24
—
69
429
(3)
426

(183)
(32)
(5)
(7)
(227)
199

Deferred tax assets included state net operating loss carryforwards of $4 million at December 31, 2016 and $5 million 
at December 31, 2015. The carryforwards expire between 2017 and 2026. The Corporation believes it is more likely than not that 
the benefit from certain of these state net operating loss carryforwards will not be realized and, accordingly, maintained a valuation 
allowance of $3 million at both December 31, 2016 and December 31, 2015. The determination regarding valuation allowances 
was based on available evidence of loss carryback capacity, projected future reversals of existing taxable temporary differences 
and assumptions made regarding future events. For further information on the Corporation’s valuation policy for deferred tax 
assets, refer to Note 1.

NOTE 19 - TRANSACTIONS WITH RELATED PARTIES 

The Corporation’s banking subsidiaries had, and expect to have in the future, transactions with the Corporation’s directors 
and executive officers, companies with which these individuals are associated, and certain related individuals. Such transactions 
were made in the ordinary course of business and included extensions of credit, leases and professional services. With respect to 
extensions of credit, all were made on substantially the same terms, including interest rates and collateral, as those prevailing at 
the same time for comparable transactions with other customers and did not, in management’s opinion, involve more than normal 
risk of collectibility or present other unfavorable features. The aggregate amount of loans attributable to persons who were related 
parties at December 31, 2016, totaled $121 million at the beginning of 2016 and $108 million at the end of 2016. During 2016, 
new loans to related parties aggregated $579 million and repayments totaled $592 million.

F-98

 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 20 - REGULATORY CAPITAL AND RESERVE REQUIREMENTS

Reserves required to be maintained and/or deposited with the FRB are classified in interest-bearing deposits with banks. 
These reserve balances vary, depending on the level of customer deposits in the Corporation’s banking subsidiaries. The average 
required reserve balances were $518 million and $473 million for the years ended December 31, 2016 and 2015, respectively.

Banking regulations limit the transfer of assets in the form of dividends, loans or advances from the bank subsidiaries to 
the parent company. Under the most restrictive of these regulations, the aggregate amount of dividends which can be paid to the 
parent company, with prior approval from bank regulatory agencies, approximated $142 million at January 1, 2017, plus 2017 net 
profits. Substantially all the assets of the Corporation’s banking subsidiaries are restricted from transfer to the parent company of 
the Corporation in the form of loans or advances.

The Corporation’s subsidiary banks declared dividends of $545 million, $437 million and $380 million in 2016, 2015

and 2014, respectively.

The Corporation and its U.S. banking subsidiaries are subject to various regulatory capital requirements administered by 
federal and state banking agencies. The U.S. adoption of the Basel III regulatory capital framework (Basel III) became effective 
for the Corporation on January 1, 2015. Basel III sets forth two comprehensive methodologies for calculating risk-weighted assets 
(RWA), a standardized approach and an advanced approach. The Corporation and its U.S. banking subsidiaries are subject to the 
standardized approach under the rules. Under the standardized approach, RWA is generally based on supervisory risk-weightings 
which vary by counterparty type and asset class. Under the Basel III standardized approach, capital is required for credit risk RWA, 
to cover the risk of unexpected losses due to failure of a customer or counterparty to meet its financial obligations in accordance 
with contractual terms; and if trading assets and liabilities exceed certain thresholds, capital is also required for market risk RWA, 
to cover the risk of losses due to adverse market movements or from position-specific factors. 

Under Basel III, there are three categories of risk-based capital: CET1 capital, Tier 1 capital and Tier 2 capital. CET1 
capital predominantly includes common shareholders' equity, less certain deductions for goodwill, intangible assets and deferred 
tax assets that arise from net operating losses and tax credit carry-forwards. Additionally, the Corporation has elected to permanently 
exclude capital in accumulated other comprehensive income related to debt and equity securities classified as available-for-sale 
as well as for defined benefit postretirement plans from CET1, an option available to standardized approach entities under Basel 
III. Tier 1 capital incrementally includes noncumulative perpetual preferred stock. Tier 2 capital includes Tier 1 capital as well as 
subordinated debt qualifying as Tier 2 and qualifying allowance for credit losses. Total capital is Tier 1 capital plus Tier 2 capital. 
In addition to the minimum risk-based capital requirements, the Corporation is required to maintain a minimum capital conservation 
buffer, in the form of common equity, in order to avoid restrictions on capital distributions and discretionary bonuses. The required 
amount of the capital conservation buffer is being phased in beginning at 0.625% on January 1, 2016 and ultimately increasing to 
2.5% on January 1, 2019. 

Quantitative measures established by regulation to ensure capital adequacy require the maintenance of minimum amounts 
and ratios of CET1, Tier 1 and total capital (as defined in the regulations) to average and/or risk-weighted assets. Failure to meet 
minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if 
undertaken, could have a direct material effect on the Corporation’s financial statements. At December 31, 2016 and 2015, the 
Corporation and its U.S. banking subsidiaries exceeded the ratios required for an institution to be considered “well capitalized” 
For U.S. banking subsidiaries, those requirements were total risk-based capital, Tier 1 risk-based capital, CET1 risk-based capital 
and leverage ratios greater than 10 percent, 8 percent, 6.5 percent and 5 percent, respectively, at December 31, 2016 and 2015. 
For the Corporation, requirements to be considered "well capitalized" were total risk-based capital and Tier 1 risk-based capital 
ratios greater than 10 percent and 6 percent, respectively, at December 31, 2016 and 2015. There have been no conditions or events 
since December 31, 2016 that management believes have changed the capital adequacy classification of the Corporation or its 
U.S. banking subsidiaries.

F-99

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

The following is a summary of the capital position of the Corporation and Comerica Bank, its principal banking subsidiary.

(dollar amounts in millions)
December 31, 2016

CET1 capital (minimum $3.1 billion (Consolidated))
Tier 1 capital (minimum-$4.1 billion (Consolidated))
Total capital (minimum-$5.4 billion (Consolidated))
Risk-weighted assets
Average assets (fourth quarter)
CET1 capital to risk-weighted assets (minimum-4.5%)
Tier 1 capital to risk-weighted assets (minimum-6.0%)
Total capital to risk-weighted assets (minimum-8.0%)
Tier 1 capital to average assets (minimum-4.0%)
Capital conservation buffer

December 31, 2015

CET1 capital (minimum $3.1 billion (Consolidated))
Tier 1 capital (minimum-$4.2 billion (Consolidated))
Total capital (minimum-$5.6 billion (Consolidated))
Risk-weighted assets
Average assets (fourth quarter)
CET1 capital to risk-weighted assets (minimum-4.5%)
Tier 1 capital to risk-weighted assets (minimum-6.0%)
Total capital to risk-weighted assets (minimum-8.0%)
Tier 1 capital to average assets (minimum-4.0%)

NOTE 21 - CONTINGENT LIABILITIES

Legal Proceedings

Comerica
Incorporated
(Consolidated)

Comerica
Bank

$

$

$

$

7,540
7,540
9,018
67,966
74,086
11.09%
11.09
13.27
10.18
5.09

7,350
7,350
8,852
69,731
71,943
10.54 %
10.54 %
12.69
10.22

7,120
7,120
8,397
67,739
73,804
10.51%
10.51
12.40
9.65
4.40

7,081
7,081
8,366
69,438
71,629
10.20 %
10.20 %
12.05
9.89

Comerica Bank, a wholly owned subsidiary of the Corporation, was named in November 2011 as a third-party defendant 
in Butte Local Development v. Masters Group v. Comerica Bank (“the case”), for lender liability. The case was tried in January 
2014, in the Montana Second District Judicial Court for Silver Bow County in Butte, Montana. On January 17, 2014, a jury awarded 
Masters $52 million against the Bank. On July 1, 2015, after an appeal filed by the Corporation, the Montana Supreme Court 
reversed the judgment against the Corporation and remanded the case for a new trial with instructions that Michigan contract law 
should apply and dismissing all other claims. The case was retried in the same district court, without a jury, in January 2017. A 
ruling is not expected for several months. Management believes that current reserves related to this case are adequate in the event 
of a negative outcome. 

The Corporation and certain of its subsidiaries are subject to various other pending or threatened legal proceedings arising 
out of the normal course of business or operations. The Corporation believes it has meritorious defenses to the claims asserted 
against it in its other currently outstanding legal proceedings and, with respect to such legal proceedings, intends to continue to 
defend itself vigorously, litigating or settling cases according to management’s judgment as to what is in the best interests of the 
Corporation and its shareholders. Settlement may result from the Corporation's determination that it may be more prudent financially 
to settle, rather than litigate, and should not be regarded as an admission of liability. On at least a quarterly basis, the Corporation 
assesses its potential liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information 
available. On a case-by-case basis, reserves are established for those legal claims for which it is probable that a loss will be incurred 
either as a result of a settlement or judgment, and the amount of such loss can be reasonably estimated. The actual costs of resolving 
these claims may be substantially higher or lower than the amounts reserved. Based on current knowledge, and after consultation 
with legal counsel, management believes that current reserves are adequate, and the amount of any incremental liability arising 
from  these  matters  is  not  expected  to  have  a  material  adverse  effect  on  the  Corporation’s  consolidated  financial  condition, 
consolidated results of operations or consolidated cash flows. Legal fees of $19 million, $21 million and $24 million for the years 
ended  December 31,  2016,  2015  and  2014,  respectively,  were  included  in  "other  noninterest  expenses"  on  the  consolidated 
statements of income.

For matters where a loss is not probable, the Corporation has not established legal reserves. The Corporation believes the 
estimate of the aggregate range of reasonably possible losses, in excess of reserves established, for all legal proceedings in which 
it is involved is from zero to approximately $31 million at December 31, 2016. This estimated aggregate range of reasonably 

F-100

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

possible losses is based upon currently available information for those proceedings in which the Corporation is involved, taking 
into account the Corporation’s best estimate of such losses for those cases for which such estimate can be made. For certain cases, 
the Corporation does not believe that an estimate can currently be made. The Corporation’s estimate involves significant judgment, 
given the varying stages of the proceedings (including the fact that many are currently in preliminary stages), the existence in 
certain proceedings of multiple defendants (including the Corporation) whose share of liability has yet to be determined, the 
numerous yet-unresolved issues in many of the proceedings (including issues regarding class certification and the scope of many 
of the claims) and the attendant uncertainty of the various potential outcomes of such proceedings. Accordingly, the Corporation’s 
estimate will change from time to time, and actual losses may be more or less than the current estimate.

In the event of unexpected future developments, it is possible that the ultimate resolution of these matters, if unfavorable, 
may be material to the Corporation's consolidated financial condition, consolidated results of operations or consolidated cash 
flows.

For information regarding income tax contingencies, refer to Note 18.

NOTE 22 - RESTRUCTURING CHARGES

The Corporation approved and launched an initiative in the second quarter 2016 designed to reduce overhead and increase 
revenue (the GEAR Up initiative). The actions in the initiative include, but are not limited to, a reduction in workforce, a new 
retirement program, streamlining operational processes, real estate optimization including consolidating 38 banking centers as 
well as reducing office and operations space, selective outsourcing of technology functions and reduction of technology system 
applications. See Note 17 for further information concerning the Corporation's retirement benefit plans.

Certain actions associated with the GEAR Up initiative result in restructuring charges. Generally, costs associated with 
or incurred to generate revenue as part of the initiative are recorded according to the nature of the cost and are not included in 
restructuring charges. The Corporation considers the following costs associated with the initiative to be restructuring charges:

•  Employee costs: Primarily severance costs in accordance with the Corporation’s severance plan.
•  Facilities costs: Costs pertaining to consolidating banking centers and other facilities, such as lease termination costs 
and decommissioning costs. Also includes accelerated depreciation and impairment of owned property to be sold.
•  Technology costs: Impairment and other costs associated with optimizing technology infrastructure and reducing the 

number of applications.

•  Other costs: Includes primarily professional fees, as well as other contract termination fees and legal fees incurred in 

the execution of the initiative. 

Restructuring charges are recorded as a component of noninterest expenses on the consolidated statements of income. 
The following table presents changes in restructuring reserves, cumulative charges incurred to date and total expected restructuring 
charges:

(in millions)

Year Ended December 31, 2016
Balance at beginning of period
Restructuring charges
Payments
Adjustments for non-cash charges (a)
Balance at end of period

Total restructuring charges incurred to date
Total expected restructuring charges (b)

Employee
Costs

Facilities
Costs

Technology
Costs

Other Costs

Total

$

$

$

— $
52
(44)
2
10

$

$

52
55

— $
15
(6)
(5)
4

$

$

15
35

— $
—
—
—
— $

— $

$15 - $35

— $
26
(22)
—
4

$

—
93
(72)
(3)
18

26
35

$
93
$140 - $160

(a)  Adjustments for non-cash charges include the benefit from forfeitures of nonvested stock compensation in Employee Costs and accelerated 

depreciation expense in Facilities Costs.

(b)  Restructuring activities are expected to be substantially completed by 12/31/2018.

Restructuring charges directly attributable to a business segment are assigned to that business segment. Restructuring 
charges incurred by areas whose services support the overall Corporation are allocated based on the methodology described in 
Note 23 to the consolidated financial statements. Total restructuring charges assigned to the Business Bank, Retail Bank and Wealth 
Management were $43 million, $38 million and $12 million, respectively, for the year ended December 31, 2016. Remaining 
expected restructuring charges will be assigned to the business segments using the same methodology. Facilities costs pertaining 
to the consolidation of banking centers are expected to impact primarily the Retail Bank.

F-101

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 23 - BUSINESS SEGMENT INFORMATION

The Corporation has strategically aligned its operations into three major business segments: the Business Bank, the Retail 
Bank and Wealth Management. These business segments are differentiated based on the type of customer and the related products 
and services provided. In addition to the three major business segments, the Finance Division is also reported as a segment. Business 
segment results are produced by the Corporation’s internal management accounting system. This system measures financial results 
based on the internal business unit structure of the Corporation. The performance of the business segments is not comparable with 
the Corporation's consolidated results and is not necessarily comparable with similar information for any other financial institution. 
Additionally, because of the interrelationships of the various segments, the information presented is not indicative of how the 
segments would perform if they operated as independent entities. The management accounting system assigns balance sheet and 
income statement items to each business segment using certain methodologies, which are regularly reviewed and refined. From 
time to time, the Corporation may make reclassifications among the segments to more appropriately reflect management's current 
view of the segments, and methodologies may be modified as the management accounting system is enhanced and changes occur 
in the organizational structure and/or product lines. For comparability purposes, amounts in all periods are based on business unit 
structure and methodologies in effect at December 31, 2016.

Net interest income for each business segment is the total of interest income generated by earning assets less interest 
expense on interest-bearing liabilities plus the net impact from associated internal funds transfer pricing (FTP) funding credits and 
charges. The FTP methodology provides the business segments credits for deposits and other funds provided and charges the 
business segments for loans and other assets utilizing funds. This credit or charge is based on matching stated or implied maturities 
for these assets and liabilities. The FTP credit provided for deposits reflects the long-term value of deposits generated based on 
their  implied  maturity.  The  FTP  charge  for  funding  assets  reflects  a  matched  cost  of  funds  based  on  the  pricing  and  term 
characteristics  of  the  assets.  For  acquired  loans  and  deposits,  matched  maturity  funding  is  determined  based  on  origination 
date. Accordingly, the FTP process reflects the transfer of interest rate risk exposures to the Treasury group within the Finance 
segment,  where  such  exposures  are  centrally  managed.  Effective  January  1,  2016,  in  conjunction  with  the  effective  date  for 
regulatory Liquidity Coverage Ratio (LCR) requirements, the Corporation prospectively implemented an additional FTP charge, 
primarily for the cost of maintaining liquid assets to support potential draws on unfunded loan commitments and for the long-term 
economic cost of holding collateral for secured deposits. The allowance for loan losses is allocated to the business segments based 
on the methodology used to estimate the consolidated allowance for loan losses described in Note 1. The related provision for loan 
losses is assigned based on the amount necessary to maintain an allowance for loan losses appropriate for each business segment. 
Noninterest income and expenses directly attributable to a line of business are assigned to that business segment. Direct expenses 
incurred  by  areas  whose  services  support  the  overall  Corporation  are  allocated  to  the  business  segments  as  follows:  product 
processing expenditures are allocated based on standard unit costs applied to actual volume measurements; administrative expenses 
are allocated based on estimated time expended; and corporate overhead is assigned 50 percent based on the ratio of the business 
segment’s noninterest expenses to total noninterest expenses incurred by all business segments and 50 percent based on the ratio 
of the business segment’s attributed equity to total attributed equity of all business segments. Equity is attributed based on credit, 
operational and interest rate risks. Most of the equity attributed relates to credit risk, which is determined based on the credit score 
and expected remaining life of each loan, letter of credit and unused commitment recorded in the business segments. Operational 
risk is allocated based on loans and letters of credit, deposit balances, non-earning assets, trust assets under management, certain 
noninterest income items, and the nature and extent of expenses incurred by business units. Virtually all interest rate risk is assigned 
to Finance, as are the Corporation’s hedging activities.

Effective January 1, 2015, changes to the terms of card program contract resulted in a change to the presentation of the 
related revenue and expenses. In 2015, under the current contract, total revenue before related expenses was recorded in noninterest 
income, and related expenses were recorded in noninterest expense; whereas in 2014, under the terms of the prior contract, revenue 
was recorded in noninterest income net of the related expenses. The effect of this change was an increase of $177 million to both 
noninterest income and noninterest expenses in the Business Bank and Other Markets in 2016. 

The following discussion provides information about the activities of each business segment. A discussion of the financial 
results and the factors impacting 2016 performance can be found in the section entitled "Business Segments" in the financial 
review.

The Business Bank meets the needs of middle market businesses, multinational corporations and governmental entities 
by offering various products and services, including commercial loans and lines of credit, deposits, cash management, capital 
market products, international trade finance, letters of credit, foreign exchange management services and loan syndication services.

The  Retail  Bank  includes  small  business  banking  and  personal  financial  services,  consisting  of  consumer  lending, 
consumer deposit gathering and mortgage loan origination. In addition to a full range of financial services provided to small 
F-102

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

business customers, this business segment offers a variety of consumer products, including deposit accounts, installment loans, 
credit cards, student loans, home equity lines of credit and residential mortgage loans.

Wealth Management offers products and services consisting of fiduciary services, private banking, retirement services, 
investment management and advisory services, investment banking and brokerage services. This business segment also offers the 
sale of annuity products, as well as life, disability and long-term care insurance products.

The Finance segment includes the Corporation’s securities portfolio and asset and liability management activities. This 
segment is responsible for managing the Corporation’s funding, liquidity and capital needs, performing interest sensitivity analysis 
and executing various strategies to manage the Corporation’s exposure to liquidity, interest rate risk and foreign exchange risk.

The Other category includes the income and expense impact of equity and cash, tax benefits not assigned to specific 
business segments, charges of an unusual or infrequent nature that are not reflective of the normal operations of the business 
segments and miscellaneous other expenses of a corporate nature.

Business segment financial results are as follows:

(dollar amounts in millions)
Year Ended December 31, 2016
Earnings summary:
Net interest income (expense)
Provision for credit losses
Noninterest income
Noninterest expenses
Provision (benefit) for income taxes
Net income (loss)
Net credit-related charge-offs

Selected average balances:
Assets
Loans
Deposits

Statistical data:
Return on average assets (a)
Efficiency ratio (b)

(dollar amounts in millions)
Year Ended December 31, 2015
Earnings summary:
Net interest income (expense)
Provision for credit losses
Noninterest income
Noninterest expenses
Provision (benefit) for income taxes
Net income (loss)
Net credit-related charge-offs (recoveries)

Selected average balances:
Assets
Loans
Deposits

Statistical data:
Return on average assets (a)
Efficiency ratio (b)

(Table continues on following page)

Business
Bank

Retail
Bank

Wealth
Management

Finance

Other

Total

$ 1,418
217
572
839
296
638
145

$
$

$

$
$

622
35
189
767
2
7
12

$ 39,497
38,067
29,704

$ 6,551
5,881
23,558

$

$
$

$

$

169
(4)
243
301
39
76
$
— $

(435) $
—
43
(4)
(144)
(244) $
— $

23
—
4
27
—
— $
— $

$ 1,797
248
1,051
1,930
193
477
157

5,232
5,048
4,126

$

$ 13,993
—
88

6,470

$ 71,743
— 48,996
57,741
265

1.62%
42.09

0.03%
93.90

1.45%
72.98

N/M
N/M

N/M
N/M

0.67%
67.53

Business
Bank

Retail
Bank

Wealth
Management

Finance

Other

Total

$ 1,498
158
571
778
371
762
89

$
$

$

$
$

626
8
185
734
22
47
29

$ 39,501
37,883
30,894

$ 6,474
5,792
22,876

$

$
$

$

179
(20)
235
305
44
85
(17)

$

$
$

(629) $
—
44
(4)
(208)
(373) $
— $

15
1
—
14
—
— $
— $

$ 1,689
147
1,035
1,827
229
521
101

5,153
4,953
4,151

$

$ 11,764
—
138

7,355

$ 70,247
— 48,628
58,326
267

1.93%

37.58

0.20%

90.37

1.65%
73.26

N/M
N/M

N/M
N/M

0.74%

66.93

F-103

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

(dollar amounts in millions)
Year Ended December 31, 2014
Earnings summary:
Net interest income (expense)
Provision for credit losses
Noninterest income
Noninterest expenses
Provision (benefit) for income taxes
Net income (loss)
Net credit-related charge-offs (recoveries)

Selected average balances:
Assets
Loans
Deposits

Business
Bank

Retail
Bank

Wealth
Management

Finance

Other

Total

$ 1,497
56
392
582
429
822
16

$
$

$

$
$

606
(7)
169
715
23
44
10

$ 37,428
36,198
28,543

$ 6,255
5,585
21,967

$

$
$

$

181
(21)
241
310
49
84
(1)

$

$
$

(662) $
—
45
(32)
(226)
(359) $
— $

33
(1)
10
40
2
$
2
— $

$ 1,655
27
857
1,615
277
593
25

4,988
4,805
3,805

$

$ 11,268
—
215

6,397

$ 66,336
— 46,588
54,784
254

Statistical data:
N/M
Return on average assets (a)
N/M
30.74
Efficiency ratio (b)
(a)  Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.
(b)  Noninterest expenses as a percentage of the sum of net interest income (fully taxable equivalent basis) and noninterest income excluding 
net securities gains.
N/M – not meaningful

1.69%
73.76

N/M
N/M

0.19%

2.20%

0.89%

64.16

92.10

The Corporation operates in three primary markets - Texas, California, and Michigan, as well as in Arizona and Florida, 
with select businesses operating in several other states, and in Canada and Mexico. The Corporation produces market segment 
results for the Corporation’s three primary geographic markets as well as Other Markets. Other Markets includes Florida, Arizona, 
the International Finance division and businesses with a national perspective. The Finance & Other category includes the Finance 
segment and the Other category as previously described. Market segment results are provided as supplemental information to the 
business segment results and may not meet all operating segment criteria as set forth in GAAP. For comparability purposes, amounts 
in all periods are based on market segments and methodologies in effect at December 31, 2016. 

A discussion of the financial results and the factors impacting performance can be found in the section entitled "Market 

Segments" in the financial review.

Market segment financial results are as follows:

(dollar amounts in millions)
Year Ended December 31, 2016
Earnings summary:
Net interest income (expense)
Provision for credit losses
Noninterest income
Noninterest expenses
Provision (benefit) for income taxes
Net income (loss)
Net credit-related charge-offs

Selected average balances:
Assets
Loans
Deposits

Statistical data:
Return on average assets (a)
Efficiency ratio (b)
(Table continues on following page)

Michigan

California

Texas

Other
Markets

Finance
& Other

Total

$

$
$

672
9
320
620
116
247
9

$

$
$

715
21
162
434
152
270
26

$

$
$

471
225
129
408
(12)
(21)
118

$

$
$

351
(7)
393
445
81
225
4

$ 13,262
12,614
21,807

$ 17,855
17,574
17,408

$11,101
10,637
10,168

$ 9,062
8,171
8,005

$

$
$

$

(412) $ 1,797
248
1,051
1,930
193
477
157

—
47
23
(144)
(244) $
— $

20,463

$ 71,743
— 48,996
57,741
353

1.09%
62.01

1.46% (0.17)%
49.49

67.80

2.48%
59.79

N/M
N/M

0.67%
67.53

F-104

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

(dollar amounts in millions)
Year Ended December 31, 2015
Earnings summary:
Net interest income (expense)
Provision for credit losses
Noninterest income
Noninterest expenses
Provision (benefit) for income taxes
Net income (loss)
Net credit-related charge-offs

Selected average balances:
Assets
Loans
Deposits

Statistical data:
Return on average assets (a)
Efficiency ratio (b)

Michigan

California

Texas

Other
Markets

Finance
& Other

Total

$

$
$

715
(27)
329
594
153
324
8

$

$
$

732
17
150
405
165
295
18

$

$
$

519
131
131
387
54
78
46

$ 13,761
13,180
21,873

$ 16,881
16,613
17,763

$ 11,778
11,168
10,882

$

$
$

$

337
25
381
431
65
197
29

8,708
7,667
7,403

$

$
$

$

(614) $
1
44
10
(208)
(373) $
— $

1,689
147
1,035
1,827
229
521
101

19,119
—
405

$ 70,247
48,628
58,326

1.42%
56.69

1.56%
45.90

0.62%
59.55

2.27%
59.79

N/M
N/M

0.74%
66.93

(dollar amounts in millions)
Year Ended December 31, 2014
Earnings summary:
Net interest income (expense)
Provision for credit losses
Noninterest income
Noninterest expenses
Provision (benefit) for income taxes
Net income (loss)
Net credit-related charge-offs (recoveries)

Selected average balances:
Assets
Loans
Deposits

Michigan

California

Texas

Other
Markets

Finance
& Other

Total

$

$
$

712
(32)
342
639
160
287
8

$

$
$

720
28
143
395
168
272
22

$

$
$

542
50
139
368
96
167
9

$ 13,749
13,336
21,023

$ 15,667
15,390
16,142

$ 11,645
10,954
10,764

$

$
$

$

$

$
$

$

310
(18)
178
205
77
224
(14)

7,610
6,908
6,386

(629) $
(1)
55
8
(224)
(357) $
— $

1,655
27
857
1,615
277
593
25

17,665
—
469

$ 66,336
46,588
54,784

Statistical data:
N/M
1.31%
Return on average assets (a)
N/M
60.41
Efficiency ratio (b)
(a)  Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.
(b)  Noninterest expenses as a percentage of the sum of net interest income (fully taxable equivalent basis) and noninterest income excluding 
net securities gains.
N/M – not meaningful

0.89%
64.16

1.59%
45.64

2.94%
42.26

1.39%
53.93

F-105

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 24 - PARENT COMPANY FINANCIAL STATEMENTS

BALANCE SHEETS - COMERICA INCORPORATED

(in millions, except share data)
December 31
Assets
Cash and due from subsidiary bank
Short-term investments with subsidiary bank
Other short-term investments
Investment in subsidiaries, principally banks
Premises and equipment
Other assets

Total assets

Liabilities and Shareholders’ Equity
Medium- and long-term debt
Other liabilities

Total liabilities

Common stock - $5 par value:

Authorized - 325,000,000 shares
Issued - 228,164,824 shares

Capital surplus
Accumulated other comprehensive loss
Retained earnings
Less cost of common stock in treasury - 52,851,156 shares at 12/31/16 and 52,457,113

shares at 12/31/15

Total shareholders’ equity
Total liabilities and shareholders’ equity

STATEMENTS OF INCOME - COMERICA INCORPORATED

(in millions)
Years Ended December 31
Income
Income from subsidiaries:

Dividends from subsidiaries
Other interest income
Intercompany management fees

Other noninterest income
Total income

Expenses
Interest on medium- and long-term debt
Salaries and benefits expense
Net occupancy expense
Equipment expense
Restructuring charges
Other noninterest expenses
Total expenses

Income before benefit for income taxes and equity in undistributed

earnings of subsidiaries
Benefit for income taxes
Income before equity in undistributed earnings of subsidiaries
Equity in undistributed earnings of subsidiaries, principally banks
Net income

Less income allocated to participating securities

Net income attributable to common shares

F-106

2016

549
1
138
3
691

10
114
5
1
33
72
235

456
(28)
484
(7)
477
4
473

$

$

2016

2015

$

$

$

761
—
87
7,561
2
150
8,561

604
161
765

1,141
2,135
(383)
7,331

(2,428)
7,796
8,561

$

4
569
89
7,523
3
137
8,325

608
157
765

1,141
2,173
(429)
7,084

(2,409)
7,560
8,325

2015

2014

441
1
123
1
566

14
112
5
1
—
70
202

364
(27)
391
130
521
6
515

$

$

384
1
118
7
510

14
114
5
1
—
70
204

306
(27)
333
260
593
7
586

$

$

$

$

$

$

 
 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

STATEMENTS OF CASH FLOWS - COMERICA INCORPORATED

(in millions)
Years Ended December 31
Operating Activities
Net income
Adjustments to reconcile net income to net cash provided by operating

activities:

Undistributed earnings of subsidiaries, principally banks
Depreciation and amortization
Net periodic defined benefit cost
Share-based compensation expense
Benefit for deferred income taxes
Excess tax benefits from share-based compensation arrangements
Other, net

Net cash provided by operating activities

Investing Activities
Net change in premises and equipment

Net cash (used in) provided by investing activities

Financing Activities
Medium- and long-term debt:

Maturities and redemptions
Issuances
Common Stock:
Repurchases
Cash dividends paid
Issuances of common stock under employee stock plans

Purchase and retirement of warrants
Excess tax benefits from share-based compensation arrangements
Other, net

Net cash (used in) provided by financing activities

Net increase (decrease) in cash and cash equivalents
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Interest paid
Income taxes recovered

2016

2015

2014

$

477

$

521

$

593

7
1
1
14
(3)
(9)
6
494

—
—

—
—

(310)
(152)
152
—
9
(5)
(306)
188
573
761
$
9
$
(139) $

(130)
1
5
14
—
(3)
5
413

(1)
(1)

(600)
—

(240)
(147)
22
(10)
3
—
(972)
(560)
1,133
573
$
$
16
(62) $

(260)
1
4
16
—
(7)
16
363

2
2

—
596

(260)
(137)
49
—
7
—
255
620
513
1,133
12
(33)

$
$
$

F-107

 
 
 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Comerica Incorporated and Subsidiaries

NOTE 25 - SUMMARY OF QUARTERLY FINANCIAL STATEMENTS (UNAUDITED)

The following quarterly information is unaudited. However, in the opinion of management, the information reflects all 

adjustments, which are necessary for the fair presentation of the results of operations, for the periods presented.

(in millions, except per share data)
Interest income
Interest expense
Net interest income
Provision for credit losses
Net securities losses
Noninterest income excluding net securities losses
Noninterest expenses
Provision for income taxes
Net income
Less income allocated to participating securities
Net income attributable to common shares
Earnings per common share:

Basic
Diluted

Comprehensive income 

(in millions, except per share data)
Interest income
Interest expense
Net interest income
Provision for credit losses
Net securities losses
Noninterest income excluding net securities losses
Noninterest expenses
Provision for income taxes
Net income
Less income allocated to participating securities
Net income attributable to common shares
Earnings per common share:

Basic
Diluted

Comprehensive income

2016

Fourth
Quarter

Third
Quarter

Second
Quarter

First
Quarter

$

$

$

$

$

$

$

$

$

$

$

$

484
29
455
35
(2)
269
461
62
164
1
163

0.95
0.92
73

Fourth
Quarter

457
24
433
60
—
266
482
41
116
1
115

0.65
0.64
32

$

$

$

480
30
450
16
—
272
493
64
149
1
148

0.87
0.84
152

473
28
445
49
(1)
269
518
42
104
1
103

0.60
0.58
137

2015

Third
Quarter

Second
Quarter

$

$

$

448
26
422
26
—
260
457
63
136
2
134

0.76
0.74
187

444
23
421
47
—
258
433
64
135
1
134

0.76
0.73
109

$

$

$

$

$

$

472
25
447
148
(2)
246
458
25
60
1
59

0.34
0.34
161

First
Quarter

435
22
413
14
(2)
253
455
61
134
2
132

0.75
0.73
176

F-108

REPORT OF MANAGEMENT

The management of Comerica Incorporated (the Corporation) is responsible for the accompanying consolidated financial 
statements and all other financial information in this Annual Report. The consolidated financial statements have been prepared in 
conformity with U.S. generally accepted accounting principles and include amounts which of necessity are based on management’s 
best estimates and judgments and give due consideration to materiality. The other financial information herein is consistent with 
that in the consolidated financial statements.

In  meeting  its  responsibility  for  the  reliability  of  the  consolidated  financial  statements,  management  develops  and 
maintains effective internal controls, including those over financial reporting, as defined in the Securities and Exchange Act of 
1934, as amended. The Corporation’s internal control over financial reporting includes policies and procedures that (1) pertain to 
the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets 
of  the  Corporation;  (2) provide  reasonable  assurance  that  transactions  are  recorded  as  necessary  to  permit  preparation  of  the 
consolidated  financial  statements  in  conformity  with  U.S.  generally  accepted  accounting  principles,  and  that  receipts  and 
expenditures of the Corporation are made only in accordance with authorizations of management and directors of the Corporation; 
and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of 
the Corporation’s assets that could have a material effect on the consolidated financial statements.

Management  assessed,  with  participation  of  the  Corporation’s  Chief  Executive  Officer  and  Chief  Financial  Officer, 
internal control over financial reporting as it relates to the Corporation’s consolidated financial statements presented in conformity 
with U.S. generally accepted accounting principles as of December 31, 2016. The assessment was based on criteria for effective 
internal  control  over  financial  reporting  described  in  Internal  Control—Integrated  Framework  issued  by  the  Committee  of 
Sponsoring  Organizations  of  the  Treadway  Commission  (2013  framework)  (the  COSO  criteria).  Based  on  this  assessment, 
management determined that internal control over financial reporting is effective as it relates to the Corporation’s consolidated 
financial statements presented in conformity with U.S. generally accepted accounting principles as of December 31, 2016.

Because of inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, 
projections of any evaluation of effectiveness to future periods are subject to risk that controls may become inadequate because 
of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

The Corporation's internal control over financial reporting as of December 31, 2016 has been audited by Ernst & Young 

LLP, an independent registered public accounting firm, as stated in their accompanying report. 

The Corporation’s Board of Directors oversees management’s internal control over financial reporting and financial 
reporting responsibilities through its Audit Committee as well as various other committees. The Audit Committee, which consists 
of  directors  who  are  not  officers  or  employees  of  the  Corporation,  meets  regularly  with  management,  internal  audit  and  the 
independent public accountants to assure that the Audit Committee, management, internal auditors and the independent public 
accountants are carrying out their responsibilities, and to review auditing, internal control and financial reporting matters.

Ralph W. Babb Jr.
Chairman and
Chief Executive Officer

David E. Duprey
Executive Vice President and
Chief Financial Officer

Muneera S. Carr
Executive Vice President and
Chief Accounting Officer

F-109

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Board of Directors and Shareholders
Comerica Incorporated

We have audited Comerica Incorporated and subsidiaries' internal control over financial reporting as of December 31, 2016, based 
on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the 
Treadway Commission (2013 framework) (the COSO criteria). Comerica Incorporated and subsidiaries' management is responsible 
for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control 
over financial reporting included in the accompanying Report of Management. Our responsibility is to express an opinion on the 
Corporation's internal control over financial reporting based on our audit. 

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). 
Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control 
over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control 
over  financial  reporting,  assessing  the  risk  that  a  material  weakness  exists,  testing  and  evaluating  the  design  and  operating 
effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in 
the circumstances. We believe that our audit provides a reasonable basis for our opinion.

A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability 
of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted 
accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain 
to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets 
of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial 
statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are 
being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable 
assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the company's assets that 
could have a material effect on the financial statements.

Because  of  its  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements. Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because 
of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, Comerica Incorporated and subsidiaries maintained, in all material respects, effective internal control over financial 
reporting as of December 31, 2016, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the 
consolidated  balance  sheets  of  Comerica  Incorporated  and  subsidiaries  as  of  December  31,  2016  and  2015,  and  the  related 
consolidated statements of income, comprehensive income, changes in shareholders' equity and cash flows for each of the three 
years in the period ended December 31, 2016 of Comerica Incorporated and subsidiaries and our report dated February 14, 2017
expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Dallas, TX
February 14, 2017

F-110

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Board of Directors and Shareholders
Comerica Incorporated

We have audited the accompanying consolidated balance sheets of Comerica Incorporated and subsidiaries as of December 31, 
2016 and 2015, and the related consolidated statements of income, comprehensive income, changes in shareholders' equity and 
cash flows for each of the three years in the period ended December 31, 2016. These financial statements are the responsibility 
of the Corporation's management. Our responsibility is to express an opinion on these financial statements based on our audits. 

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). 
Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements 
are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures 
in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by 
management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable 
basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position 
of Comerica Incorporated and subsidiaries at December 31, 2016 and 2015, and the consolidated results of their operations and 
their cash flows for each of the three years in the period ended December 31, 2016, in conformity with U.S. generally accepted 
accounting principles. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), 
Comerica  Incorporated  and  subsidiaries’  internal  control  over  financial  reporting  as  of  December 31,  2016,  based  on  criteria 
established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway 
Commission (2013 framework) and our report dated February 14, 2017 expressed an unqualified opinion thereon.

/s/ Ernst & Young LLP

Dallas, TX
February 14, 2017

F-111

HISTORICAL REVIEW - AVERAGE BALANCE SHEETS
Comerica Incorporated and Subsidiaries

CONSOLIDATED FINANCIAL INFORMATION

(in millions)
Years Ended December 31
ASSETS
Cash and due from banks

Interest-bearing deposits with banks
Other short-term investments

Investment securities

Commercial loans
Real estate construction loans
Commercial mortgage loans
Lease financing
International loans
Residential mortgage loans
Consumer loans
Total loans

Less allowance for loan losses

Net loans

Accrued income and other assets

Total assets

LIABILITIES AND SHAREHOLDERS’ EQUITY
Noninterest-bearing deposits

Money market and interest-bearing checking deposits
Savings deposits
Customer certificates of deposit
Other time deposits
Foreign office time deposits

Total interest-bearing deposits

Total deposits
Short-term borrowings
Accrued expenses and other liabilities
Medium- and long-term debt

Total liabilities
Total shareholders’ equity

Total liabilities and shareholders’ equity

2016

2015

2014

2013

2012

$

1,146

$

1,059

$

934

$

987

$

5,099
102

6,158
106

12,348

10,237

5,513
109

9,350

4,930
112

9,637

983

4,128
134

9,915

31,062
2,508
8,981
684
1,367
1,894
2,500
48,996
(730)
48,266
4,782
$ 71,743

31,501
1,884
8,697
783
1,441
1,878
2,444
48,628
(621)
48,007
4,680
$ 70,247

29,715
1,909
8,706
834
1,376
1,778
2,270
46,588
(601)
45,987
4,443
$ 66,336

27,971
1,486
9,060
847
1,275
1,620
2,153
44,412
(622)
43,790
4,477
$ 63,933

26,224
1,390
9,842
864
1,272
1,505
2,209
43,306
(693)
42,613
4,796
$ 62,569

$ 29,751

$ 28,087

$ 25,019

$ 22,379

$ 21,004

22,744
2,013
3,200
—
33
27,990
57,741
138
1,273
4,917
64,069
7,674
$ 71,743

24,073
1,841
4,209
—
116
30,239
58,326
93
1,389
2,905
62,713
7,534
$ 70,247

22,891
1,744
4,869
—
261
29,765
54,784
200
1,016
2,963
58,963
7,373
$ 66,336

21,704
1,657
5,471
—
500
29,332
51,711
211
1,074
3,972
56,968
6,965
$ 63,933

20,622
1,593
5,902
—
412
28,529
49,533
76
1,133
4,818
55,560
7,009
$ 62,569

F-112

HISTORICAL REVIEW - STATEMENTS OF INCOME
Comerica Incorporated and Subsidiaries

CONSOLIDATED FINANCIAL INFORMATION

(in millions, except per share data)
Years Ended December 31
INTEREST INCOME
Interest and fees on loans
Interest on investment securities
Interest on short-term investments

Total interest income

INTEREST EXPENSE
Interest on deposits
Interest on medium- and long-term debt
Total interest expense
Net interest income

Provision for credit losses

Net interest income after provision for loan losses

NONINTEREST INCOME
Card fees
Service charges on deposit accounts
Fiduciary income
Commercial lending fees
Letter of credit fees
Bank-owned life insurance
Foreign exchange income
Brokerage fees
Net securities (losses) gains
Other noninterest income

Total noninterest income

NONINTEREST EXPENSES
Salaries and benefits expense
Outside processing fee expense
Net occupancy expense
Equipment expense
Restructuring charges
Software expense
FDIC insurance expense
Advertising expense
Litigation-related expenses
Gain on debt redemption
Other noninterest expenses

Total noninterest expenses

Income before income taxes
Provision for income taxes
NET INCOME
Less income allocated to participating securities
Net income attributable to common shares
Earnings per common share:

Basic
Diluted

Comprehensive income

Cash dividends declared on common stock
Cash dividends declared per common share

$

$

$

2016

2015

2014

2013

2012

$

$

$

1,635
247
27
1,909

40
72
112
1,797
248
1,549

303
219
190
89
50
42
42
19
(5)
102
1,051

961
336
157
53
93
119
54
21
1
—
135
1,930
670
193
477
4
473

2.74
2.68

523

155
0.89

$

$

$

1,551
216
17
1,784

43
52
95
1,689
147
1,542

276
223
187
99
53
40
40
17
(2)
102
1,035

1,009
318
159
53
—
99
37
24
(32)
—
160
1,827
750
229
521
6
515

2.93
2.84

504

148
0.83

$

$

$

1,525
211
14
1,750

45
50
95
1,655
27
1,628

81
215
180
98
57
39
40
17
—
130
857

980
111
171
57
—
95
33
23
4
(32)
173
1,615
870
277
593
7
586

3.28
3.16

572

143
0.79

$

$

$

1,556
214
14
1,784

55
57
112
1,672
46
1,626

78
214
171
99
64
40
36
17
(1)
156
874

1,009
111
160
60
—
90
33
21
52
(1)
179
1,714
786
245
541
8
533

2.92
2.85

563

126
0.68

1,617
234
12
1,863

70
65
135
1,728
79
1,649

70
214
158
96
71
39
38
19
12
146
863

1,018
100
163
65
35
90
38
27
23
—
191
1,750
762
241
521
6
515

2.68
2.67

464

106
0.55

F-113

HISTORICAL REVIEW - STATISTICAL DATA
Comerica Incorporated and Subsidiaries

CONSOLIDATED FINANCIAL INFORMATION

Years Ended December 31
Average Rates (Fully Taxable Equivalent Basis)
Interest-bearing deposits with banks
Other short-term investments

Investment securities

Commercial loans
Real estate construction loans
Commercial mortgage loans
Lease financing
International loans
Residential mortgage loans
Consumer loans
Total loans
Interest income as a percentage of earning assets

Domestic deposits
Deposits in foreign offices

Total interest-bearing deposits

Short-term borrowings
Medium- and long-term debt

Interest expense as a percentage of interest-bearing sources

Interest rate spread
Impact of net noninterest-bearing sources of funds
Net interest margin as a percentage of earning assets

Ratios
Return on average common shareholders’ equity
Return on average assets
Efficiency ratio (a)
Common equity tier 1 capital as a percentage of risk weighted

assets (b)

Tier 1 capital as a percentage of risk-weighted assets (b)
Total capital as a percentage of risk-weighted assets
Common equity ratio
Tangible common equity as a percentage of tangible assets (c)

Per Common Share Data
Book value at year-end
Market value at year-end
Market value for the year

High
Low

2016

2015

2014

2013

2012

0.51%
0.61

0.26%
0.81

0.26%
0.57

0.26%
1.22

0.26%
1.65

2.02

3.26
3.63
3.49
2.65
3.63
3.76
3.32
3.34
2.88

0.14
0.35
0.14
0.45
1.45
0.34
2.54
0.17
2.71%

2.13

3.07
3.48
3.41
3.17
3.58
3.77
3.26
3.20
2.75

0.14
1.02
0.14
0.05
1.80
0.29
2.46
0.14
2.60%

2.26

3.12
3.41
3.75
2.33
3.65
3.82
3.20
3.28
2.85

0.14
0.82
0.15
0.04
1.68
0.29
2.56
0.14
2.70%

2.25

3.28
3.85
4.11
3.23
3.74
4.09
3.30
3.51
3.03

0.18
0.52
0.19
0.07
1.45
0.33
2.70
0.14
2.84%

2.43

3.44
4.44
4.44
3.01
3.73
4.55
3.42
3.74
3.27

0.24
0.63
0.25
0.12
1.36
0.41
2.86
0.17
3.03%

6.22%
0.67
67.53

6.91%
0.74
66.93

8.05%
0.89
64.16

7.76%
0.85
68.72

7.43%
0.83
69.15

11.09
11.09
13.27
10.68
9.89

10.54
10.54
12.69
10.52
9.70

n/a

n/a

n/a

10.50
12.51
10.70
9.85

10.64
13.10
10.97
10.07

10.14
13.15
10.67
9.76

$ 44.47
68.11

$ 43.03
41.83

$ 41.35
46.84

$ 39.22
47.54

$ 36.86
30.34

70.44
30.48

53.45
39.52

53.50
42.73

48.69
30.73

34.00
26.25

Other Data (share data in millions)
Average common shares outstanding - basic
Average common shares outstanding - diluted
Number of banking centers
Number of employees (full-time equivalent)
(a)  Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains (losses).
(b)  Ratios calculated based on the risk-based capital requirements in effect at the time. The U.S. implementation of the Basel III regulatory 

191
192
489
9,035

179
185
481
8,876

176
181
477
8,880

183
187
483
8,948

172
177
458
7,960

capital framework became effective on January 1, 2015, with transitional provisions. 

(c)  See Supplemental Financial Data section for reconcilements of non-GAAP financial measures.
n/a - not applicable

F-114

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly 

caused this report to be signed on its behalf by the undersigned, thereunto duly authorized as of February 14, 2017.

SIGNATURES

COMERICA INCORPORATED

By:

/s/ Ralph W. Babb, Jr.
Ralph W. Babb, Jr.
Chairman and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following 

persons on behalf of the registrant in the capacities indicated as of February 14, 2017.

/s/ Ralph W. Babb, Jr.

Ralph W. Babb, Jr.

/s/ David E. Duprey

David E. Duprey

/s/ Muneera S. Carr
Muneera S. Carr

/s/ Michael E. Collins

Michael E. Collins

/s/ Roger A. Cregg

Roger A. Cregg

T. Kevin DeNicola

Jacqueline P. Kane

/s/ Richard G. Lindner

 Richard G. Lindner

/s/ Alfred A. Piergallini

Alfred A. Piergallini

/s/ Robert S. Taubman

Robert S. Taubman

/s/ Reginald M. Turner, Jr.

Reginald M. Turner, Jr.

/s/ Nina G. Vaca

Nina G. Vaca

/s/ Michael G. Van de Ven

Michael G. Van de Ven

Chairman and Chief Executive Officer and

Director (Principal Executive Officer)

Executive Vice President and Chief Financial Officer

(Principal Financial Officer)

Executive Vice President and Chief Accounting Officer

(Principal Accounting Officer)

Director

Director

Director

Director

Director

Director

Director

Director

Director

Director

S-1

 
 
EXHIBIT INDEX

Restated Certificate of Incorporation of Comerica Incorporated (filed as Exhibit 3.2 to Registrant's Current Report 
on Form 8-K dated August 4, 2010, and incorporated herein by reference).

Certificate of Amendment to Restated Certificate of Incorporation of Comerica Incorporated (filed as Exhibit 3.2 
to Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2011, and incorporated herein by 
reference).

Amended and Restated Bylaws of Comerica Incorporated (filed as Exhibit 3.3 to Registrant's Quarterly Report on 
Form 10-Q for the quarter ended March 31, 2011, and incorporated herein by reference).

[Reference is made to Exhibits 3.1, 3.2 and 3.3 in respect of instruments defining the rights of security holders. In 
accordance with Regulation S-K Item No. 601(b)(4)(iii), the Registrant is not filing copies of instruments defining 
the rights of holders of long-term debt because none of those instruments authorizes debt in excess of 10% of the 
total assets of the registrant and its subsidiaries on a consolidated basis. The Registrant hereby agrees to furnish a 
copy of any such instrument to the SEC upon request.]

Warrant Agreement, dated May 6, 2010, between the registrant and Wells Fargo Bank, N.A. (filed as Exhibit 4.1 to 
Registrant's Registration Statement on Form 8-A dated May 7, 2010, and incorporated herein by reference).

Form of Warrant (filed as Exhibit 4.1 to Registrant's Registration Statement on Form 8-A dated May 7, 2010, and 
incorporated herein by reference).

Warrant Agreement, dated as of June 9, 2010, between Comerica Incorporated (as successor to Sterling Bancshares, 
Inc.)  and American Stock  Transfer  &  Trust  Company, LLC  (filed  as  Exhibit  4.1  to  Sterling  Bancshares,  Inc.'s 
Registration Statement on Form 8-A12B filed on June 10, 2010 (File No. 001-34768) and incorporated herein by 
reference).

Appointment of Wells Fargo Bank, N.A. as successor Warrant Agent under the Warrant Agreement, dated as of June 
9, 2010, of Comerica Incorporated (as successor to Sterling Bancshares, Inc.) (filed as Exhibit 4.1 to Registrant's 
Quarterly Report on Form 10-Q for the quarter ended September 30, 2015, and incorporated herein by reference).

Form of Warrant (filed as Exhibit 4.2 to Registrant's Registration Statement on Form S-4 (File No. 333-172211), 
and incorporated herein by reference).

 (not applicable)

3.1

3.2

3.3

4

4.1

4.2

4.3

4.3A

4.4

9

10.1†

Comerica Incorporated 2006 Amended and Restated Long-Term Incentive Plan.

10.1A†

10.1B†

10.1C†

10.1D†

10.1E†

10.1F†

10.1G†

10.1H†

Form of Standard Comerica Incorporated Non-Qualified Stock Option Agreement under the Comerica Incorporated 
Amended and Restated 2006 Long-Term Incentive Plan (filed as Exhibit 10.7 to Registrant's Annual Report on 
Form 10-K for the year ended December 31, 2006, and incorporated herein by reference).

Form of Standard Comerica Incorporated Non-Qualified Stock Option Agreement under the Comerica Incorporated 
Amended and Restated 2006 Long-Term Incentive Plan (2011 version) (filed as Exhibit 10.44 to Registrant's Annual 
Report on Form 10-K for the year ended December 31, 2010, and incorporated herein by reference).

Form of Standard Comerica Incorporated Non-Qualified Stock Option Agreement under the Comerica Incorporated 
Amended and Restated 2006 Long-Term Incentive Plan (2012 version) (filed as Exhibit 10.1C to Registrant's Annual 
Report on Form 10-K for the year ended December 31, 2011, and incorporated herein by reference).

Form of Standard Comerica Incorporated Non-Qualified Stock Option Agreement under the Comerica Incorporated 
Amended and Restated 2006 Long-Term Incentive Plan (2014 version) (filed as Exhibit 10.1 to Registrant's Current 
Report on Form 8-K dated January 21, 2014, and incorporated herein by reference).

Form of Standard Comerica Incorporated Non-Qualified Stock Option Agreement under the Comerica Incorporated 
Amended and Restated 2006 Long-Term Incentive Plan (2014 version 2) (filed as Exhibit 10.1 to Registrant's Current 
Report on Form 8-K dated July 22, 2014, and incorporated herein by reference).

Form of Standard Comerica Incorporated Non-Qualified Stock Option Agreement under the Comerica Incorporated 
Amended and Restated 2006 Long-Term Incentive Plan (2015 version) (filed as Exhibit 10.2 to Registrant's Current 
Report on Form 8-K dated November 10, 2015, and incorporated herein by reference).

Form of Standard Comerica Incorporated Non-Qualified Stock Option Agreement under the Comerica Incorporated 
Amended and Restated 2006 Long-Term Incentive Plan (2017 version).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (non-cliff vesting) under the Amended 
and Restated Comerica Incorporated 2006 Long-Term Incentive Plan (filed as Exhibit 10.11 to Registrant's Annual 
Report on Form 10-K for the year ended December 31, 2006, and incorporated herein by reference).

E-1

10.1I†

10.1J†

10.1K†

10.1L†

10.1M†

10.1N†

10.1O†

10.1P†

10.1Q†

10.1R†

10.1S†

10.1T†

10.1U†

10.1V†

10.1W†

10.1X†

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (non-cliff vesting) under the Amended 
and  Restated  Comerica  Incorporated  2006  Long-Term Incentive  Plan  (2011  version)  (filed  as  Exhibit 10.46  to 
Registrant's Annual  Report  on  Form 10-K  for  the  year  ended  December 31,  2010,  and  incorporated  herein  by 
reference).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (non-cliff vesting) under the Amended 
and  Restated  Comerica  Incorporated  2006  Long-Term Incentive  Plan  (2012  version)  (filed  as  Exhibit  10.1F  to 
Registrant's Annual  Report  on  Form  10-K  for  the  year  ended  December  31,  2011,  and  incorporated  herein  by 
reference).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (non-cliff vesting) under the Amended 
and  Restated  Comerica  Incorporated  2006  Long-Term  Incentive  Plan  (2014  version)  (filed  as  Exhibit  10.2  to 
Registrant's Current Report on Form 8-K dated January 21, 2014, and incorporated herein by reference).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (non-cliff vesting) under the Amended 
and Restated Comerica Incorporated 2006 Long-Term Incentive Plan (2014 version 2) (filed as Exhibit 10.2 to 
Registrant's Current Report on Form 8-K dated July 22, 2014, and incorporated herein by reference).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (non-cliff vesting) under the Amended 
and Restated Comerica Incorporated 2006 Long-Term Incentive Plan (2017 version).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (cliff vesting) under the Comerica 
Incorporated 2006 Amended and Restated Long-Term Incentive Plan (filed as Exhibit 99.1 to Registrant's Current 
Report on Form 8-K dated January 22, 2007, and incorporated herein by reference).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (cliff vesting) under the Comerica 
Incorporated  2006 Amended  and  Restated  Long-Term Incentive  Plan  (2011  version)  (filed  as  Exhibit 10.45  to 
Registrant's Annual  Report  on  Form 10-K  for  the  year  ended  December 31,  2010,  and  incorporated  herein  by 
reference).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (cliff vesting) under the Comerica 
Incorporated  2006 Amended  and  Restated  Long-Term Incentive  Plan  (2012  version)  (filed  as  Exhibit  10.1I  to 
Registrant's Annual  Report  on  Form  10-K  for  the  year  ended  December  31,  2011,  and  incorporated  herein  by 
reference).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (cliff vesting) under the Comerica 
Incorporated 2006 Amended and Restated Long-Term Incentive Plan (2017 version).

Form of Standard Comerica Incorporated Restricted Stock Award Agreement (cliff vesting) under the Comerica 
Incorporated  2006  Amended  and  Restated  Long-Term  Incentive  Plan  (long-term  restricted  version)  (filed  as 
Exhibit 10.41 to Registrant's Annual Report on Form 10-K for the year ended December 31, 2009, and incorporated 
herein by reference).

Form  of  Standard  Comerica  Incorporated  Restricted  Stock  Unit  Agreement  under  the  Amended  and  Restated 
Comerica Incorporated 2006 Long-Term Incentive Plan (2011 version) (filed as Exhibit 10.47 to Registrant's Annual 
Report on Form 10-K for the year ended December 31, 2010, and incorporated herein by reference).

Form  of  Standard  Comerica  Incorporated  Restricted  Stock  Unit  Agreement  under  the  Amended  and  Restated 
Comerica  Incorporated  2006  Long-Term Incentive  Plan  (2011  version  2)  (filed  as  Exhibit  10.5  to  Registrant's 
Quarterly Report on Form 10-Q for the quarter ended September 30, 2011, and incorporated herein by reference).

Form of Standard Comerica Incorporated Performance Restricted Stock Unit Agreement under the Amended and 
Restated Comerica Incorporated 2006 Long-Term Incentive Plan (2012 version) (filed as Exhibit 10.1 to Registrant's 
Current Report on Form 8-K dated November 19, 2012, and incorporated herein by reference).

Form of Standard Comerica Incorporated Senior Executive Long-Term Performance Restricted Stock Unit Award 
Agreement under the Amended and Restated Comerica Incorporated 2006 Long-Term Incentive Plan (filed as Exhibit 
10.3 to Registrant's Current Report on Form 8-K dated January 21, 2014, and incorporated herein by reference).

Form of Standard Comerica Incorporated Senior Executive Long-Term Performance Restricted Stock Unit Award 
Agreement under the Amended and Restated Comerica Incorporated 2006 Long-Term Incentive Plan (2014 version 
2) (filed as Exhibit 10.3 to Registrant's Current Report on Form 8-K dated July 22, 2014, and incorporated herein 
by reference).

Form of Standard Comerica Incorporated Senior Executive Long-Term Performance Restricted Stock Unit Award 
Agreement under the Amended and Restated Comerica Incorporated 2006 Long-Term Incentive Plan (2015 version) 
(filed as Exhibit 10.1 to Registrant's Current Report on Form 8-K dated November 10, 2015, and incorporated herein 
by reference).

10.1Y†

Form of Standard Comerica Incorporated Senior Executive Long-Term Performance Restricted Stock Unit Award 
Agreement under the Amended and Restated Comerica Incorporated 2006 Long-Term Incentive Plan (2017 version).

E-2

10.2†

10.2A†

10.3†

10.4†

10.5†

10.6†

10.7†

10.8†

10.9†

10.10†

10.11†

10.12†

10.13†

10.14†

10.14A†

10.14B†

10.14C†

Comerica Incorporated 1997 Amended and Restated Long-Term Incentive Plan (filed as Exhibit 10.1 to Registrant's 
Annual Report on Form 10-K for the year ended December 31, 2001, and incorporated herein by reference).

Form of Standard Comerica Incorporated Non-Qualified Stock Option Agreement under the Amended and Restated 
Comerica Incorporated 1997 Long-Term Incentive Plan (filed as Exhibit 10.4 to Registrant's Quarterly Report on 
Form 10-Q for the quarter ended September 30, 2004, and incorporated herein by reference).

Amended and Restated Sterling Bancshares, Inc. 2003 Stock Incentive and Compensation Plan effective April 30, 
2007 (filed as Exhibit 10.1 to Sterling Bancshares, Inc.'s Current Report on Form 8-K dated August 14, 2007 (File 
No. 000-20750), and incorporated herein by reference).

Comerica Incorporated Amended and Restated Employee Stock Purchase Plan (amended and restated October 22, 
2013) (filed as Exhibit 10.5 to Registrant's Annual Report on Form 10-K for the year ended December 31, 2013, 
and incorporated herein by reference).

Comerica Incorporated 2011 Management Incentive Plan (filed as Exhibit 10.1 to Registrant's Current Report on 
Form 8-K dated April 26, 2011, and incorporated herein by reference).

Comerica Incorporated 2016 Management Incentive Plan (filed as Exhibit 10.1 to Registrant's Current Report on 
Form 8-K dated May 2, 2016, and incorporated herein by reference).

Form  of  Standard  Comerica  Incorporated  No  Sale Agreement  under  the  Comerica  Incorporated Amended  and 
Restated Management Incentive Plan (filed as Exhibit 10.5 to Registrant's Quarterly Report on Form 10-Q for the 
quarter ended September 30, 2004, and incorporated herein by reference).

Supplemental Retirement Income Account Plan (formerly known as the Amended and Restated Benefit Equalization 
Plan for Employees of Comerica Incorporated) (amended and restated October 13, 2016, with amendments effective 
January 1, 2017) (filed as Exhibit 10.1 to Registrant's Current Report on Form 8-K dated January 26, 2017, and 
incorporated herein by reference). 

1999 Comerica Incorporated Amended and Restated Deferred Compensation Plan (amended and restated on July 
26, 2011) (filed as Exhibit 10.1 to Registrant's Current Report on Form 8-K dated July 26, 2011, and incorporated 
herein by reference).

1999 Comerica Incorporated Amended and Restated Common Stock Deferred Incentive Award Plan (amended and 
restated on July 26, 2011) (filed as Exhibit 10.2 to Registrant's Current Report on Form 8-K dated July 26, 2011, 
and incorporated herein by reference).

Sterling Bancshares, Inc. Deferred Compensation Plan (as Amended and Restated) (filed as Exhibit 4.4 to Registrant's  
Registration Statement on Form S-8 dated July 28, 2011 (Registration No. 333-175857) and incorporated herein by 
reference).  

Amended and Restated Comerica Incorporated Non-Employee Director Fee Deferral Plan (amended and restated 
on January 27, 2015) (filed as Exhibit 10.13 to Registrant's Annual Report on Form 10-K for the year ended December 
31, 2014, and incorporated herein by reference).

Amended and Restated Comerica Incorporated Common Stock Non-Employee Director Fee Deferral Plan (amended 
and restated on January 27, 2015)  (filed as Exhibit 10.14 to Registrant's Annual Report on Form 10-K for the year 
ended December 31, 2014, and incorporated herein by reference).

Comerica Incorporated Amended and Restated Incentive Plan for Non-Employee Directors (amended and restated 
effective May 15, 2014) (filed as Exhibit 10.3 to Registrant's Quarterly Report on Form 10-Q for the quarter ended 
March 31, 2015, and incorporated herein by reference).

Form  of  Standard  Comerica  Incorporated  Non-Employee  Director  Restricted  Stock  Unit Agreement  under  the 
Comerica Incorporated Amended and Restated Incentive Plan for Non-Employee Directors (filed as Exhibit 10.2 
to Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2005, and incorporated herein by 
reference).

Form  of  Standard  Comerica  Incorporated  Non-Employee  Director  Restricted  Stock  Unit Agreement  under  the 
Comerica Incorporated Amended and Restated Incentive Plan for Non-Employee Directors (Version 2) (filed as 
Exhibit 10.6 to Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2006, and incorporated 
herein by reference).

Form  of  Standard  Comerica  Incorporated  Non-Employee  Director  Restricted  Stock  Unit Agreement  under  the 
Comerica Incorporated Amended and Restated Incentive Plan for Non-Employee Directors (Version 2.5) (filed as 
Exhibit 10.48 to Registrant's Annual Report on Form 10-K for the year ended December 31, 2010, and incorporated 
herein by reference).

E-3

10.14D†

10.14E†

10.15†

10.15A†

10.16†

10.17†

10.18†

10.19A†

10.19B†

10.19C†

10.20†

10.20A†

10.21†

10.21A†

10.22†

10.23†

Form  of  Standard  Comerica  Incorporated  Non-Employee  Director  Restricted  Stock  Unit Agreement  under  the 
Comerica Incorporated Amended and Restated Incentive Plan for Non-Employee Directors (Version 3) (filed as 
Exhibit 10.1 to Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2009, and incorporated 
herein by reference).

Form  of  Standard  Comerica  Incorporated  Non-Employee  Director  Restricted  Stock  Unit Agreement  under  the 
Comerica Incorporated Amended and Restated Incentive Plan for Non-Employee Directors (Version 4) (filed as 
Exhibit 10.4 to Registrant's Quarterly Report on Form 10-Q for the quarter ended June 30, 2011, and incorporated 
herein by reference).

2015  Comerica  Incorporated  Incentive  Plan  for  Non-Employee  Directors  (filed  as  Exhibit  10.4  to  Registrant's 
Quarterly Report on Form 10-Q for the quarter ended March 31, 2015, and incorporated herein by reference). 

Form of Standard Comerica Incorporated Non-Employee Director Restricted Stock Unit Agreement under the 2015 
Comerica Incorporated Incentive Plan for Non-Employee Directors (filed as Exhibit 10.1 to Registrant's Quarterly 
Report on Form 10-Q for the quarter ended September 30, 2015, and incorporated herein by reference).

Form of Indemnification Agreement between Comerica Incorporated and certain of its directors and officers (filed 
as Exhibit 10.6 to Registrant's Annual Report on Form 10-K for the year ended December 31, 2002, and incorporated 
herein by reference).

Supplemental Benefit Agreement with Eugene A. Miller (filed as Exhibit 10.1 to Registrant's Quarterly Report on 
Form 10-Q for the quarter ended September 30, 2002, and incorporated herein by reference).

Supplemental Pension and Retiree Medical Agreement with Ralph W. Babb Jr. (filed as Exhibit 10.2 to Registrant's 
Quarterly Report on Form 10-Q for the quarter ended June 30, 1998, and incorporated herein by reference).

Restrictive Covenants and General Release Agreement by and between J. Michael Fulton and Comerica Incorporated 
dated April 3, 2014 (filed as Exhibit 10.1 to Registrant's Current Report on Form 8-K dated April 3, 2014, and 
incorporated herein by reference).

Restrictive Covenants and General Release Agreement by and between Jon W. Bilstrom and Comerica Incorporated 
dated July 21, 2016 (filed as Exhibit 10.1 to Registrant's Current Report on Form 8-K dated July 27, 2016, and 
incorporated herein by reference).

Restrictive Covenants and General Release Agreement by and between J. Patrick Faubion and Comerica Incorporated 
dated December 11, 2016.

Form of Change of Control Employment Agreement (BE4 and Higher Version without gross-up or window period-
current) (filed as Exhibit 10.2 to Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 
2015, and incorporated herein by reference).

Schedule of Named Executive Officers Party to Change of Control Employment Agreement (BE4 and Higher
Version without gross-up or window period-current).

Form of Change of Control Employment Agreement (BE4 and Higher Version) (filed as Exhibit 10.1 to Registrant's 
Current Report on Form 8-K dated November 18, 2008, and incorporated herein by reference).

Schedule  of  Named  Executive  Officers  Party  to  Change  of  Control  Employment Agreement (BE4  and  Higher 
Version).

Form  of  Change  of  Control  Employment  Agreement  (BE4  and  Higher  Version  without  gross-up  or  window 
period-2009  version)  (filed  as  Exhibit 10.42  to  Registrant's  Annual  Report  on  Form 10-K  for  the  year  ended 
December 31, 2009, and incorporated herein by reference).

Form of Change of Control Employment Agreement (BE2-BE3 Version) (filed as Exhibit 10.2 to Registrant's Current 
Report on Form 8-K dated November 18, 2008, and incorporated herein by reference).

10.23A†

Schedule of Named Executive Officers Party to Change of Control Employment Agreement (BE2-BE3 Version).

11

12

13

14

16

18

Statement regarding Computation of Net Income Per Common Share (incorporated by reference from Note 15 on 
page F-88 of this Annual Report on Form 10-K).

(not applicable)

(not applicable)

(not applicable)

(not applicable)

(not applicable)

E-4

21

22

23.1

24

31.1

31.2

32

33

34

35

95

99

100

101

†

Subsidiaries of Registrant.

(not applicable)

Consent of Ernst & Young LLP.

(not applicable)

Chairman  and  CEO  Rule 13a-14(a)/15d-14(a)  Certification  of  Periodic  Report  (pursuant  to  Section 302  of  the 
Sarbanes-Oxley Act of 2002).

Executive  Vice  President  and  CFO  Rule 13a-14(a)/15d-14(a)  Certification  of  Periodic  Report  (pursuant  to 
Section 302 of the Sarbanes-Oxley Act of 2002).

Section 1350 Certification of Periodic Report (pursuant to Section 906 of the Sarbanes-Oxley Act of 2002).

(not applicable)

(not applicable)

(not applicable)

(not applicable)

(not applicable)

(not applicable)

Financial statements from Annual Report on Form 10-K of the Registrant for the year ended December 31, 2016, 
formatted in Extensible Business Reporting Language: (i) the Consolidated Balance Sheets, (ii) the Consolidated 
Statements of Income, (iii) the Consolidated Statements of Changes in Shareholders' Equity, (iv) the Consolidated 
Statements of Cash Flows and (v) the Notes to Consolidated Financial Statements.

Management contract or compensatory plan or arrangement.

File No. for all filings under Exchange Act, unless otherwise noted: 1-10706.

E-5

 
Shareholder Information

Stock: Comerica’s common stock trades on the New York Stock Exchange (NYSE) under the symbol CMA.

Shareholder Assistance
Inquiries related to shareholder records, change of name, address or ownership of stock, and lost or stolen stock certificates should be directed 
to the transfer agent and registrar:

WRITTEN REQUESTS:

CERTIFIED/OVERNIGHT MAIL:

Wells Fargo, Shareowner Services
P.O. Box 64854, St. Paul, MN 55164-0854
(877) 536-3551         stocktransfer@wellsfargo.com

Wells Fargo Shareowner Services
1110 Centre Pointe Curve, Suite 101, Mendota Heights, MN 55120
(877) 536-3551         shareowneronline.com

Elimination of Duplicate Materials
If you receive duplicate mailings at one address, you may have multiple shareholder accounts. You can consolidate your multiple accounts into a 
single, more convenient account by contacting the transfer agent shown above. In addition, if more than one member of your household is 
receiving shareholder materials, you can eliminate the duplicate mailings by contacting the transfer agent.

Dividend Reinvestment Plan
The dividend reinvestment plan permits participating shareholders of record to reinvest dividends in Comerica common stock. Participating 
shareholders also may invest up to $10,000 in additional funds each month for the purchase of additional shares. A brochure describing the plan 
in detail and an authorization form can be requested from the transfer agent shown above.

Dividend Direct Deposit
Common shareholders of Comerica may have their dividends deposited into their savings or checking account at any bank that is a member of 
the National Automated Clearing House (ACH) system. Information describing this service and an authorization form can be requested from the 
transfer agent shown above.

Dividend Payments
Subject to approval of the board of directors and applicable regulatory requirements, dividends customarily are paid on Comerica’s common 
stock on or about January 1, April 1, July 1 and October 1.

Officer Certifications
On May 23, 2016, Comerica’s Chief Executive Officer submitted his annual certification to the New York Stock Exchange stating that he was not 
aware of any violation by Comerica of the Exchange’s corporate governance listing standards. Comerica filed the certifications by its Chief 
Executive Officer and Chief Financial Officer required by Section 302 of the Sarbanes-Oxley Act of 2002 as exhibits to its Annual Report on Form 
10-K for the fiscal year ended December 31, 2016.

Investor Relations on the Internet: Go to investor.comerica.com to find the latest investor relations information about Comerica.
Stock Prices, Dividends and Yields

Quarter

High

Low

Dividends per Share

Dividend Yield*

FOURTH
THIRD
SECOND
FIRST

FOURTH
THIRD
SECOND
FIRST

$
$
$
$

$
$
$
$

70.44 $
47.81 $
47.55 $
41.74 $

47.44 $
52.93 $
53.45 $
47.94 $

2016
46.75 $
38.39 $
36.27 $
30.48 $
2015
39.52 $
40.01 $
44.38 $
40.09 $

0.23
0.23
0.22
0.21

0.21
0.21
0.21
0.20

1.6%
2.1%
2.1%
2.3%

1.9%
1.8%
1.7%
1.8%

* Dividend yield is calculated by annualizing the quarterly dividend per share and dividing by an average of the high and low price in the quarter.

As of January 31, 2017, there were 9,596 holders of record of Comerica's common stock.

Community Reinvestment Act (CRA) Performance: Comerica is committed to meeting the credit needs of the communities it serves.

Equal Employment Opportunity
Comerica is committed to its affirmative action program and practices, which ensure uniform treatment of employees without regard to 
ancestry, race, color, religion, sex, national origin, age, disability, medical condition, protected veteran status, marital status, pregnancy, weight, 
height, genetic information, gender identity, gender expression or sexual orientation.

Corporate Ethics
The Corporate Governance section of Comerica’s website at comerica.com includes the following codes of ethics: Senior Financial Officer Code 
of Ethics, Code of Business Conduct and Ethics for Employees, and Code of Business Conduct and Ethics for Members of the Board of Directors. 
Comerica will also disclose in that website section any amendments or waivers to the Senior Financial Officer Code of Ethics within four business 
days of such an event.

General Information
Directory Services 800.521.1190 

Product Information 800.292.1300

Comerica Corporate Headquarters

Comerica Bank Tower
1717 Main Street
Dallas, Texas 75201