Table of Contents

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q 

(Mark One)
xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended June 30, 2018March 31, 2019
Or
oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from             to             
Commission file number 1-10706

Comerica Incorporated
(Exact name of registrant as specified in its charter)

Delaware38-1998421
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer
Identification No.)
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) 

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 ý No o
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 ý No o
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.
Large accelerated filer ý
 
Accelerated filer o

Non-accelerated filer o
(Do not check if a smaller reporting company)
 
Smaller reporting company o
Emerging growth company o
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No ý
Indicate the number of shares outstanding of each of the issuer's classes of common stock, as of the latest practicable date.
$5 par value common stock:
Outstanding as of July 25, 2018: 171,399,203April 24, 2019: 154,160,837 shares

COMERICA INCORPORATED AND SUBSIDIARIES
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Part I. FINANCIAL INFORMATION
Item 1. Financial Statements

CONSOLIDATED BALANCE SHEETS
Comerica Incorporated and Subsidiaries
(in millions, except share data)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
(unaudited)  (unaudited)  
ASSETS      
Cash and due from banks$1,424
 $1,438
$1,063
 $1,390
      
Interest-bearing deposits with banks4,236
 4,407
2,418
 3,171
Other short-term investments134
 96
136
 134
      
Investment securities available-for-sale11,915
 10,938
12,212
 12,045
Investment securities held-to-maturity
 1,266
      
Commercial loans31,530
 31,060
32,007
 31,976
Real estate construction loans3,257
 2,961
3,291
 3,077
Commercial mortgage loans9,124
 9,159
8,989
 9,106
Lease financing458
 468
535
 507
International loans993
 983
1,040
 1,013
Residential mortgage loans1,954
 1,988
1,949
 1,970
Consumer loans2,476
 2,554
2,491
 2,514
Total loans49,792
 49,173
50,302
 50,163
Less allowance for loan losses(677) (712)(647) (671)
Net loans49,115
 48,461
49,655
 49,492
   
Premises and equipment467
 466
474
 475
Accrued income and other assets4,696
 4,495
4,732
 4,111
Total assets$71,987
 $71,567
$70,690
 $70,818
      
LIABILITIES AND SHAREHOLDERS’ EQUITY      
Noninterest-bearing deposits$30,316
 $32,071
$26,242
 $28,690
      
Money market and interest-bearing checking deposits22,544
 21,500
22,889
 22,560
Savings deposits2,227
 2,152
2,175
 2,172
Customer certificates of deposit2,089
 2,165
Certificates of deposit2,776
 2,131
Foreign office time deposits34
 15
9
 8
Total interest-bearing deposits26,894
 25,832
27,849
 26,871
Total deposits57,210
 57,903
54,091
 55,561
   
Short-term borrowings58
 10
935
 44
Accrued expenses and other liabilities1,057
 1,069
1,407
 1,243
Medium- and long-term debt5,583
 4,622
6,848
 6,463
Total liabilities63,908
 63,604
63,281
 63,311
      
Common stock - $5 par value:      
Authorized - 325,000,000 shares      
Issued - 228,164,824 shares1,141
 1,141
1,141
 1,141
Capital surplus2,144
 2,122
2,159
 2,148
Accumulated other comprehensive loss(589) (451)(513) (609)
Retained earnings8,374
 7,887
8,979
 8,781
Less cost of common stock in treasury - 57,254,526 shares at 6/30/18 and 55,306,483 shares at 12/31/17(2,991) (2,736)
Less cost of common stock in treasury - 72,747,011 shares at 3/31/19 and 68,081,176 shares at 12/31/18(4,357) (3,954)
Total shareholders’ equity8,079
 7,963
7,409
 7,507
Total liabilities and shareholders’ equity$71,987
 $71,567
$70,690
 $70,818
See notes to consolidated financial statements (unaudited).

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited)
Comerica Incorporated and Subsidiaries 


Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions, except per share data)2018 2017 2018 20172019 2018
INTEREST INCOME          
Interest and fees on loans$568
 $453
 $1,077
 $874
$621
 $509
Interest on investment securities64
 62
 128
 123
72
 64
Interest on short-term investments18
 14
 35
 28
17
 17
Total interest income650
 529
 1,240
 1,025
710
 590
INTEREST EXPENSE          
Interest on deposits28
 9
 44
 18
52
 16
Interest on short-term borrowings1
 
Interest on medium- and long-term debt32
 20
 57
 37
51
 25
Total interest expense60
 29
 101
 55
104
 41
Net interest income590
 500
 1,139
 970
606
��549
Provision for credit losses(29) 17
 (17) 33
(13) 12
Net interest income after provision for credit losses619
 483
 1,156
 937
619
 537
NONINTEREST INCOME          
Card fees60
 80
 119
 157
63
 59
Service charges on deposit accounts53
 57
 107
 115
51
 54
Fiduciary income52
 51
 104
 100
49
 52
Commercial lending fees23
 22
 41
 42
22
 18
Foreign exchange income11
 12
Letter of credit fees11
 11
 21
 23
9
 10
Bank-owned life insurance9
 9
 18
 19
9
 9
Foreign exchange income12
 11
 24
 22
Brokerage fees6
 6
 13
 11
7
 7
Net securities gains
 
 1
 
Net securities (losses) gains(8) 1
Other noninterest income22
 29
 44
 58
25
 22
Total noninterest income248
 276
 492
 547
238
 244
NONINTEREST EXPENSES          
Salaries and benefits expense250
 231
 505
 476
265
 255
Outside processing fee expense64
 88
 125
 175
63
 61
Net occupancy expense37
 38
 75
 76
37
 38
Software expense29
 31
Equipment expense11
 11
 22
 22
12
 11
Restructuring charges11
 14
 27
 25
Software expense32
 31
 63
 60
FDIC insurance expense12
 12
 25
 25
5
 13
Advertising expense8
 7
 14
 11
5
 6
Litigation-related expense
 
 
 (2)
Restructuring charges
 16
Other noninterest expenses23
 25
 38
 46
17
 15
Total noninterest expenses448
 457
 894
 914
433
 446
Income before income taxes419
 302
 754
 570
424
 335
Provision for income taxes93
 99
 147
 165
85
 54
NET INCOME326
 203
 607
 405
339
 281
Less income allocated to participating securities2
 1
 4
 3
2
 2
Net income attributable to common shares$324
 $202
 $603
 $402
$337
 $279
Earnings per common share:          
Basic$1.90
 $1.15
 $3.52
 $2.30
$2.14
 $1.62
Diluted1.87
 1.13
 3.46
 2.24
2.11
 1.59
          
Comprehensive income290
 221
 468
 427
435
 178
          
Cash dividends declared on common stock58
 46
 110
 88
105
 52
Cash dividends declared per common share0.34
 0.26
 0.64
 0.49
0.67
 0.30
See notes to consolidated financial statements (unaudited).


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


  Accumulated 
Common Stock Other Total
Common Stock   
Accumulated
Other
Comprehensive
Loss
     
Total
Shareholders’
Equity
Shares CapitalComprehensiveRetainedTreasuryShareholders'
(in millions, except per share data)
Shares
Outstanding
 Amount 
Capital
Surplus
 
Retained
Earnings
 
Treasury
Stock
 OutstandingAmountSurplusLossEarningsStockEquity
             
BALANCE AT DECEMBER 31, 2016175.3
 $1,141
 $2,135
 $(383) $7,331
 $(2,428) $7,796
Cumulative effect of change in accounting principle

 
 3
 
 (2) 
 1
BALANCE AT DECEMBER 31, 2017172.9
$1,141
$2,122
$(451)$7,887
$(2,736)$7,963
Cumulative effect of change in accounting principles



1
14

15
Net income
 
 
 
 405
 
 405




281

281
Other comprehensive income, net of tax
 
 
 22
 
 
 22
Cash dividends declared on common stock ($0.49 per share)
 
 
 
 (88) 
 (88)
Other comprehensive loss, net of tax


(103)

(103)
Cash dividends declared on common stock ($0.30 per share)



(52)
(52)
Purchase of common stock(3.7) 
 
 
 
 (257) (257)(1.7)



(159)(159)
Net issuance of common stock under employee stock plans2.8
 
 (26) 
 (20) 128
 82
1.2

(11)
(17)59
31
Net issuance of common stock for warrants1.5
 
 (25) 
 (46) 71
 
0.1

(1)
(3)4

Share-based compensation
 
 24
 
 
 
 24


24



24
Other
 
 (1) 
 
 1
 
BALANCE AT JUNE 30, 2017175.9
 $1,141
 $2,110
 $(361) $7,580
 $(2,485) $7,985
BALANCE AT MARCH 31, 2018172.5
$1,141
$2,134
$(553)$8,110
$(2,832)$8,000
               
BALANCE AT DECEMBER 31, 2017172.9
 $1,141
 $2,122
 $(451) $7,887
 $(2,736) $7,963
Cumulative effect of change in accounting principles
 
 
 1
 14
 
 15
BALANCE AT DECEMBER 31, 2018160.1
$1,141
$2,148
$(609)$8,781
$(3,954)$7,507
Cumulative effect of change in accounting principle



(14)
(14)
Net income
 
 
 
 607
 
 607




339

339
Other comprehensive loss, net of tax
 
 
 (139) 
 
 (139)
Cash dividends declared on common stock ($0.64 per share)
 
 
 
 (110) 
 (110)
Other comprehensive income, net of tax


96


96
Cash dividends declared on common stock ($0.67 per share)



(105)
(105)
Purchase of common stock(3.4) 
 
 
 
 (328) (328)(5.2)



(434)(434)
Net issuance of common stock under employee stock plans1.3
 
 (11) 
 (21) 69
 37
0.5

(13)
(22)31
(4)
Net issuance of common stock for warrants0.1
 
 (1) 
 (3) 4
 
Share-based compensation
 
 34
 
 
 
 34


24



24
BALANCE AT JUNE 30, 2018170.9
 $1,141
 $2,144
 $(589) $8,374
 $(2,991) $8,079
BALANCE AT MARCH 31, 2019155.4
$1,141
$2,159
$(513)$8,979
$(4,357)$7,409
See notes to consolidated financial statements (unaudited).



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CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)
Comerica Incorporated and Subsidiaries


Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 20172019 2018
OPERATING ACTIVITIES      
Net income$607
 $405
$339
 $281
Adjustments to reconcile net income to net cash provided by operating activities:      
Provision for credit losses(17) 33
(13) 12
Provision (benefit) for deferred income taxes14
 (19)
(Benefit) provision for deferred income taxes(4) 7
Depreciation and amortization60
 60
29
 31
Net periodic defined benefit credit(10) (9)(7) (5)
Share-based compensation expense34
 24
24
 24
Net amortization of securities2
 3

 1
Accretion of loan purchase discount
 (2)
Net securities gains(1) 
Net gains on sales of foreclosed property(1) (1)
Net securities losses (gains)8
 (1)
Net change in:      
Accrued income receivable(38) (1)(20) (26)
Accrued expenses payable(51) (17)(27) (22)
Other, net15
 174
(289) 56
Net cash provided by operating activities614
 650
40
 358
INVESTING ACTIVITIES      
Investment securities available-for-sale:      
Maturities and redemptions895
 771
487
 444
Sales5
 1,259
987
 5
Purchases(891) (2,169)(1,532) (441)
Investment securities held-to-maturity:   
Maturities and redemptions
 153
Net change in loans(651) (370)(151) (98)
Proceeds from sales of foreclosed property6
 4

 1
Net increase in premises and equipment(41) (27)(16) (20)
Purchases of Federal Home Loan Bank stock(41) (22)(16) (41)
Proceeds from bank-owned life insurance settlements3
 6
2
 3
Other, net(1) 2
Net cash used in investing activities(716) (393)(239) (147)
FINANCING ACTIVITIES      
Net change in:      
Deposits(737) (2,084)(1,586) (77)
Short-term borrowings48
 516
891
 38
Medium- and long-term debt   
Federal Home Loan Bank advances1,000
 
Terminations
 (16)
Issuances and advances of medium- and long-term debt350
 1,000
Common stock:      
Repurchases(337) (265)(443) (168)
Cash dividends paid(104) (81)(99) (53)
Issuances under employee stock plans46
 90
6
 40
Other, net1
 (4)
Net cash used in financing activities(83) (1,844)
Net decrease in cash and cash equivalents(185) (1,587)
Net cash (used in) provided by financing activities(881) 780
Net (decrease) increase in cash and cash equivalents(1,080) 991
Cash and cash equivalents at beginning of period5,845
 7,218
4,561
 5,845
Cash and cash equivalents at end of period$5,660
 $5,631
$3,481
 $6,836
Interest paid$99
 $54
$98
 $40
Income tax paid94
 130
12
 2
Noncash investing and financing activities:      
Loans transferred to other real estate2
 4

 1
Securities transferred from held-to-maturity to available-for-sale1,266
 

 1,266
Securities transferred from available-for-sale to equity securities81
 

 81
See notes to consolidated financial statements (unaudited).

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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

NOTE 1 - BASIS OF PRESENTATION AND ACCOUNTING POLICIES
Organization
The accompanying unaudited consolidated financial statements were prepared in accordance with United States (U.S.) generally accepted accounting principles (GAAP) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation were included. The results of operations for the sixthree months ended June 30, 2018March 31, 2019 are not necessarily indicative of the results that may be expected for the year ending December 31, 20182019. Certain items in prior periods were reclassified to conform to the current presentation. For further information, refer to the consolidated financial statements and footnotes thereto included in the Annual Report of Comerica Incorporated and Subsidiaries (the Corporation) on Form 10-K for the year ended December 31, 20172018.
Revenue RecognitionLeases
Effective January 1, 2018, the Corporation adopted the provision of Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 606, "Revenue from Contracts with Customers" (Topic 606), using the modified retrospective method applied to all open contracts as of January 1, 2018.
Under Topic 606, card fee revenue from certain products is generally presented net of network costs, including interchange costs, surcharge fees and assessment fees, as opposed to the previous presentation of associated network costs in outside processing fees in the Consolidated Statements of Comprehensive Income. Similar adjustments were made for other revenue streams that resulted in certain costs being recognized in the same category as the associated revenues in noninterest income.
The adoption of Topic 606 resulted in decreases of $37 million in card fees and $1 million in service charges on deposits accounts, included in noninterest income, and a corresponding $38 million decrease in outside processing fees included in noninterest expenses, in the Consolidated Statements of Comprehensive Income for the three months ended June 30, 2018. For the six months ended June 30, 2018, the impact on the Consolidated Statements of Comprehensive Income was a $71 million decrease in card fees, a $2 million decrease in service charges on deposit accounts and a $73 million decrease in outside processing fee expense.
The Corporation previously deferred recognition of certain treasury management fees included in service charges on deposit accounts in the Consolidated Statements of Comprehensive Income until the amount of compensation was considered fixed and determinable. Under the new guidance, the portion of these fees that are based on agreed upon rates less estimated credits expected to be earned by the customer is recognized as services are rendered. As a result, the Corporation recorded a transition adjustment of $14 million, after tax, to retained earnings, included in cumulative effect of change in accounting principles in the accompanying Consolidated Statements of Changes in Shareholders Equity. Similar adjustments were made for other revenue streams that resulted in an additional cumulative transition after-tax adjustment to retained earnings of $2 million.
Revenues from contracts with customers may be recognized when services are complete or as they are rendered, although contracts are generally short-term by nature. Services provided over a period of time are typically transferred to customers evenly over the term of the contracts and revenue is recognized evenly over the period services are provided. Contract receivables are included in accrued income and other assets on the Consolidated Balance Sheets. Payment terms vary by services offered, and the timing between completion of performance obligations and payment is typically not significant.
Card fees comprise interchange and other fee income earned on government card, commercial card, debit/Automated Teller Machine card and merchant payment processing programs. Card fees are presented net of network costs as performance obligations for card services are limited to transaction processing and settlement with the card network on behalf of the customers. Network costs were approximately $37 million and $26 million for the three months ended June 30, 2018 and 2017, respectively, and $71 million and $51 million for the six months ended June 30, 2018 and 2017, respectively. Fees for these services are primarily based on interchange rates set by the network and transaction volume. The Corporation also provides ongoing card program support services, for which fees are based on contractually agreed prices and customer demand for services.
Service charges on deposit accounts comprise charges on retail and business accounts, including fees for treasury management services. These treasury management services include transaction-based services related to payment processing, overdrafts, non-sufficient funds and other deposit account activity, as well as account management services that are provided over time. Business customers can earn credits depending on deposit balances maintained with the Corporation, which may be used to offset fees. Fees and credits are based on predetermined, agreed upon rates.

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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Fiduciary income includes fees and commissions from asset management, custody, recordkeeping, investment advisory and other services provided primarily to personal and institutional trust customers. Revenue is recognized as the services are performed and is based either on the market value of the assets managed or the services provided, as well as agreed upon rates.
Commercial lending fees include both revenue from contracts with customers (primarily loan servicing fees) and other sources of revenue. Commercial loan servicing fees are based on contractually agreed prices and when the services are provided. Other sources of revenue in commercial lending fees primarily include fees assessed on the unused portion of commercial lines of credit (unused commitment fees) and syndication arrangements.
Brokerage fees are commissions earned for facilitating securities transactions for customers, as well other brokerage services provided. Revenue is recognized when services are complete and are based on the type of services provided and agreed upon rates. The Corporation pays commissions based on brokerage fee revenue. These are typically recognized when incurred because the amortization period is one year or less and are included in salaries and benefits expense in the Consolidated Statements of Comprehensive Income.
Other revenues, consisting primarily of other retail fees, investment banking fees and insurance commissions, are typically recognized when services or transactions are completed and are based on the type of services provided and agreed upon rates.
Except as discussed above, commissions and other incentives paid to employees are generally based on several internal and external metrics and as a result are not solely dependent on revenue generating activities.
Classification and Measurement of Financial Instruments
Effective January 1, 2018,2019, the Corporation adopted the provisions of Accounting Standards Update (ASU) No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition of Financial Assets and Financial Liabilities," (ASU 2016-01). 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. At adoption, an immaterial amount of cumulative net unrealized losses on equity securities previously recognized in accumulated other comprehensive income (AOCI) was reclassified to the opening balance of retained earnings, included in cumulative effect of change in accounting principles in the accompanying Consolidated Statements of Changes in Shareholders Equity. Changes to the fair value of equity securities occurring after December 31, 2017, other than equity method investments, are included in net securities losses in the Consolidated Statements of Comprehensive Income. Also, as part of adopting ASU 2016-01, the Corporation refined the calculation used to determine the estimated fair value of loans disclosed in note 2 to the consolidated financial statements.
Statement of Cash Flows
The Corporation adopted FASB issued ASU No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments,” (ASU 2016-15) on January 1, 2018 and, as a result, reclassified $6 million of proceeds from settlement of bank-owned life insurance policies from operating activities to investing activities for the six-month period ended June 30, 2017.
Defined Benefit Pension and Other Postretirement Costs
The Corporation retrospectively adopted the provisions of ASU No. 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost” (ASU 2017-07) on January 1, 2018, which requires employers to report service cost as part of compensation expense and the other components of net benefit credit separately from service cost. As a result, $12 million and $24 million of benefit from the other components of net benefit credit was reclassified from salaries and benefits expense to other noninterest expenses in the Consolidated Statements of Comprehensive Income for the three and six months ended June 30, 2017, respectively. The Corporation based the adjustment to the prior periods on amounts disclosed in note 10.
Derivatives Instruments and Hedging Activities
The Corporation adopted ASU No. 2017-12, “Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities” (ASU 2017-12), effective January 1, 2018. At transition, the Corporation elected to change the measurement methodology of all long-haul fair value hedges existing at December 31, 2017. The prior period effect of this election was a $1 million reduction to opening retained earnings, included in cumulative effect of change in accounting principles in the Consolidated Statements of Shareholders' Equity. In addition, the Corporation made a transition election to reclassify the portfolio of held-to-maturity securities to available-for-sale in January 2018 as the securities are eligible to be hedged. This resulted in the recognition of additional unrealized losses of $11 million at the date of transfer.

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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Income Taxes
The Tax Cuts and Jobs Act (the "Act"), enacted on December 22, 2017, reduced the U.S. federal corporate tax rate from 35 percent to 21 percent. Also, on December 22, 2017, the Securities and Exchange Commission issued Staff Accounting Bulletin No. 118 (SAB 118), which provides guidance on accounting for tax effects of the Act. SAB 118 provides a measurement period of up to one year from the enactment date to complete the accounting. Based on the information available and current interpretation of the rules, the Corporation has made reasonable estimates of the impact of the reduction in the corporate tax rate and remeasurement of certain deferred tax assets and liabilities based on the rate at which they are expected to reverse in the future, generally 21 percent. The provisional amount recorded related to the remeasurement of the Corporation's deferred tax balance was $104 million, including $107 million recognized in the year ended December 31, 2017 and a $3 million downward revision to the estimated impact recorded in the six months ended June 30, 2018. The final impact of the Act may differ from these estimates as a result of changes in management’s interpretations and assumptions, as well as new guidance that may be issued by the Internal Revenue Service (IRS).
Pending Accounting Pronouncements
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. ASU 2016-02 requires lessees to recognize lease contractsfor all open leases with a term greater than one year onas of the balance sheet, while recognizing expenses on the income statement in a manner similar to current guidance. ASU 2016-02 is effective for the Corporation on January 1, 2019 and must be appliedadoption date, using the modified retrospective approach. In July 2018,Prior comparable periods are presented in accordance with previous guidance under Accounting Standards Codification (ASC) 840, “Leases.”
Topic 842 requires the FASB issuedrecognition of a lease liability measured as the present value of unpaid lease payments for operating leases where the Corporation is the lessee, and a corresponding right-of-use (ROU) asset for the right to use the leased properties. The Corporation elected not to reassess whether contracts are or contain leases, lease classification or initial direct costs for existing leases, a set of practical expedients for transition provided by ASU 2018-11 “Leases (Topic 842): Targeted Improvements,” which provides lessees2016-12. Further, the optionCorporation elected the practical expedient to applyuse hindsight in determining the new leasing standard to all open leaseslease term and assessing impairment. The election of the hindsight practical expedient resulted in longer lease terms for a limited number of strategic locations based on relevant factors as of the adoption date.
The impact at adoption was increases of $329 million and $343 million to total assets and liabilities, respectively, and a $14 million reduction to retained earnings. The increase in total assets was due to the recognition of ROU assets recorded in accrued income and other assets, and the increase in total liabilities was due to corresponding recognition of lease payment liabilities recorded in accrued expenses and other liabilities.
Operating lease liabilities reflect the Corporation’s obligation to make future lease payments, primarily for real estate locations. Lease terms typically comprise contractual terms but may include extension options reasonably assured of being exercised at lease inception for certain strategic locations such as regional headquarters. Payments are discounted using the rate the Corporation would pay to borrow amounts equal to the lease payments over the lease term (the Corporation’s incremental borrowing rate). The Corporation expects to make usedoes not separate lease and non-lease components for contracts in which it is the lessee. ROU assets are measured based on lease liabilities adjusted for incentives and timing differences between operating lease expense and payments, recognized on a straight-line basis over the lease term. Operating lease expense is recognized on a straight-line basis over the lease term, while variable lease payments are recognized as incurred. Common area maintenance and other executory costs are the main components of this transition optionvariable lease payments. Operating and is currently finalizing review of key assumptions and evaluation of service contracts for embedded leases. Based on preliminary evaluation, the right-of-use asset and correspondingvariable lease obligation liabilityexpenses are expected to range between $450 million and $550 million at adoption, resultingrecorded in an 8- to 10-basis point decreasenet occupancy expense in the common equity tier 1 capital (CET1) ratio. Preliminary estimatesConsolidated Statements of Income.
The Corporation is the lessor in sales-type, direct finance and leveraged lease arrangements. Leases are based on the current interest rate environment which may differ from thoserecorded at the timeprincipal balance outstanding, net of adoptionunearned income and charge-offs. Interest income is recognized using the interest method. The impact of the standard. The Corporation will continue to evaluate other impacts of adoption but doesadopting Topic 842 for lessor accounting was not anticipate these to be significant.
Pending Accounting Pronouncements
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 a cost basis. Under the new model, entities must estimate current expected credit losses by considering all available relevant information, including historical and current information,conditions, as well as reasonable and supportable forecasts of future events. The update also requires additional qualitative and quantitative informationdisclosure to allow users to better understand the credit risk within the portfolio and the methodologies for determining the allowance for credit losses.
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’s cross-functional implementation team, led by the Chief Financial Officer and Chief Credit Officer, continued to make progress in accordance with the detailed implementation plan for adoption. In prior periods, the Corporation developed new credit estimation models and, in the first quarter 2019, completed internal validation of

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

the models. The Corporation will adopt the standard on January 1, 2020 and is currently evaluatingfinalizing and documenting new processes and controls, challenging current model assumptions and outputs, refining the qualitative framework as well as drafting policies and disclosures. Additionally, limited parallel runs, which began in the fourth quarter 2018, will be enhanced throughout 2019 as the end-to-end processes, controls and policies are finalized.
The ultimate impact of ASU 2016-13 will depend on the composition of the portfolio as well as economic conditions and forecasts at the time of adoption. Based on current factors, the overall allowance for credit losses is not expected to materially change due to the portfolio’s relatively short average contractual life. The commercial portfolio, which comprises most of the Corporation’s portfolio, consists of loans and lending arrangements with short contractual maturities which are expected to result in a slight reduction to the allowance for credit losses. The allowance for credit losses is expected to increase for the consumer portfolio given its longer contractual maturities. The standard will be adopted in first quarter 2020.
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.
Equity securities, investment securities available-for-sale, derivatives and deferred compensation plan assets and 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 noteNote 1 to the consolidated financial statements in the Corporation's Annual Report on Form 10-K for the year ended December 31, 20172018 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.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

ASSETS AND LIABILITIES RECORDED AT FAIR VALUE ON A RECURRING BASISAssets and Liabilities 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 of June 30, 2018March 31, 2019 and December 31, 20172018.
(in millions)Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 
June 30, 2018        
March 31, 2019        
Deferred compensation plan assets$91
 $91
 $
 $
 $91
 $91
 $
 $
 
Equity securities41
 41
 
 
 43
 43
 
 
 
Investment securities available-for-sale:                
U.S. Treasury and other U.S. government agency securities2,699
 2,699
 
 
 2,756
 2,756
 
 
 
Residential mortgage-backed securities (a)9,216
 
 9,216
 
 9,456
 
 9,456
 
 
Total investment securities available-for-sale11,915
 2,699
 9,216
 
 12,212
 2,756
 9,456
 
 
Derivative assets:                
Interest rate contracts35
 
 29
 6
 112
 
 98
 14
 
Energy derivative contracts177
 
 177
 
 96
 
 96
 
 
Foreign exchange contracts39
 
 39
 
 15
 
 15
 
 
Warrants2
 
 
 2
 
Total derivative assets253
 
 245
 8
 223
 
 209
 14
 
Total assets at fair value$12,300
 $2,831
 $9,461
 $8
 $12,569
 $2,890
 $9,665
 $14
 
Derivative liabilities:                
Interest rate contracts$117
 $
 $117
 $
 $47
 $
 $47
 $
 
Energy derivative contracts177
 
 177
 
 93
 
 93
 
 
Foreign exchange contracts32
 
 32
 
 9
 
 9
 
 
Total derivative liabilities326
 
 326
 
 149
 
 149
 
 
Deferred compensation plan liabilities91
 91
 
 
 91
 91
 
 
 
Total liabilities at fair value$417
 $91
 $326
 $
 $240
 $91
 $149
 $
 
December 31, 2017        
Trading securities:        
December 31, 2018        
Deferred compensation plan assets$92
 $92
 $
 $
 $88
 $88
 $
 $
 
Equity securities43
 43
 
 
 
Investment securities available-for-sale:                
U.S. Treasury and other U.S. government agency securities2,727
 2,727
 
 
 2,727
 2,727
 
 
 
Residential mortgage-backed securities (a)8,124
 
 8,124
 
 9,318
 
 9,318
 
 
State and municipal securities5
 
 
 5
(b)
Equity and other non-debt securities82
 38
 
 44
(b)
Total investment securities available-for-sale10,938
 2,765

8,124

49
 12,045
 2,727

9,318


 
Derivative assets:                
Interest rate contracts57
 
 43
 14
 67
 
 58
 9
 
Energy derivative contracts93
 
 93
 
 189
 
 189
 
 
Foreign exchange contracts42
 
 42
 
 19
 
 19
 
 
Warrants2
 
 
 2
 
Total derivative assets194
 
 178
 16
 275
 
 266
 9
 
Total assets at fair value11,224
 $2,857
 $8,302
 $65
 $12,451
 $2,858
 $9,584
 $9
 
Derivative liabilities:                
Interest rate contracts59
 
 59
 
 $70
 $
 $70
 $
 
Energy derivative contracts91
 
 91
 
 186
 
 186
 
 
Foreign exchange contracts40
 
 40
 
 13
 
 13
 
 
Total derivative liabilities190
 
 190
 
 269
 
 269
 
 
Deferred compensation plan liabilities92
 92
 
 
 88
 88
 
 
 
Total liabilities at fair value$282
 $92
 $190
 $
 $357
 $88
 $269
 $
 
(a)Issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.
(b)Auction-rate securities.
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 each of the three- and six-monththree-month periods ended June 30, 2018March 31, 2019 and 2017.2018.

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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

The following table summarizes the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the three- and six-monththree-month periods ended June 30, 2018March 31, 2019 and 2017.2018.
    Net Realized/Unrealized Gains (Losses) (Pretax) Recorded in Earnings        Net Realized/Unrealized Gains (Losses) (Pretax) Recorded in Earnings (b)    
Balance 
at
Beginning
of Period
     Balance at End of Period
Balance 
at
Beginning
of Period
 Change in Classification (a)   Balance at End of Period
 Change in Classification (a) Net Realized/Unrealized Gains (Losses) (Pretax) Recorded in EarningsSales and Redemptions  Net Realized/Unrealized Gains (Losses) (Pretax) Recorded in Earnings (b)
(in millions) RealizedSales and RedemptionsRealizedUnrealized  RealizedSales and RedemptionsRealizedUnrealized
Three Months Ended June 30, 2018           
Three Months Ended March 31, 2019           
Derivative assets:                      
Interest rate contracts$7
 $
 $
 $(1)(b) $
 $6
$9
 $
 $
 $5
 $
 $14
Warrants2
 
 1
(b)
 (1) 2
Three Months Ended June 30, 2017           
Investment securities available-for-sale:           
State and municipal securities (c)$5
 $
 $
 $
 $
 $5
Equity and other non-debt securities (c)46
 
 
 
 
 46
Total investment securities available-for-sale51
 
 
 
 
 51
Derivative assets:           
Interest rate contracts11
 
 

 2
(b) 
 13
Warrants2
 
 4
(b)
 (4) 2
Six Months Ended June 30, 2018           
Three Months Ended March 31, 2018           
Equity securities$
 $44
 $
 $
 $(44) $
$
 $44
 $
 $
 $(44) $
Investment securities available-for-sale:                      
State and municipal securities (c)5
 
 
 
 (5) 
5
 
 
 
 (5) 
Equity and other non-debt securities (c)44
 (44) 
 
 
 
44
 (44) 
 
 
 
Total investment securities available-for-sale49
 (44) 
 
 (5) 
49
 (44) 
 
 (5) 
Derivative assets:                      
Interest rate contracts14
 
 
 (8)(b) 
 6
14
 


 (7) 
 7
Warrants2
 
 1
(b)
 (1) 2
Six Months Ended June 30, 2017           
Investment securities available-for-sale:           
State and municipal securities (c)$7
 $
 $
 $
 $(2) $5
Equity and other non-debt securities (c)47
 
 
 
 (1) 46
Total investment securities available-for-sale54
 
 
 
 (3) 51
Derivative assets:           
Interest rate contracts11
 
 

 2
(b) 
 13
Warrants3
 
 5
(b)(1)(b) (5) 2
(a)Reflects the reclassification of equity securities resulting from the adoption of ASU 2016-01.
(b)Realized and unrealized gains and losses due to changes in fair value are recorded in Other Noninterest Incomeother noninterest income on the Consolidated Statements of Comprehensive Income.
(c)Auction-rate securities.


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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica IncorporatedAssets and Subsidiaries

ASSESTS AND LIABILITIES AT FAIR VALUE ON A NONRECURRING BASISLiabilities at Fair Value on a Nonrecurring Basis
The Corporation may be required 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.
The following table presents assets recorded at fair value on a nonrecurring basis at June 30, 2018March 31, 2019 and December 31, 2017.2018. No liabilities were recorded at fair value on a nonrecurring basis at June 30, 2018March 31, 2019 and December 31, 2017.2018.
(in millions)Level 3Level 3
June 30, 2018 
Loans: 
Commercial$76
Commercial mortgage4
Total loans80
Other real estate1
Total assets at fair value$81
December 31, 2017 
March 31, 2019 
Loans:  
Commercial$111
$40
Commercial mortgage5
2
Total assets at fair value$116
$42
December 31, 2018 
Loans: 
Commercial$33
Commercial mortgage2
Total assets at fair value$35
Level 3 assets recorded at fair value on a nonrecurring basis at June 30, 2018March 31, 2019 and December 31, 20172018 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, thecollateral. 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.
ESTIMATED FAIR VALUES OF FINANCIAL INSTRUMENTS NOT RECORDED AT FAIR VALUE ON A RECURRING BASISEstimated 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.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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:
Carrying
Amount
 Estimated Fair Value
Carrying
Amount
 Estimated Fair Value
(in millions) Total Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3
June 30, 2018         
March 31, 2019         
Assets                  
Cash and due from banks$1,424
 $1,424
 $1,424
 $
 $
$1,063
 $1,063
 $1,063
 $
 $
Interest-bearing deposits with banks4,236
 4,236
 4,236
 
 
2,418
 2,418
 2,418
 
 
Loans held-for-sale2
 2
 
 2
 
2
 2
 
 2
 
Total loans, net of allowance for loan losses (a)49,115
 48,929
 
 
 48,929
49,655
 50,154
 
 
 50,154
Customers’ liability on acceptances outstanding3
 3
 3
 
 
4
 4
 4
 
 
Restricted equity investments248
 248
 248
 
 
264
 264
 264
 
 
Nonmarketable equity securities (b)6
 11
      6
 10
      
Liabilities                  
Demand deposits (noninterest-bearing)30,316
 30,316
 
 30,316
 
26,242
 26,242
 
 26,242
 
Interest-bearing deposits24,805
 24,805
 
 24,805
 
25,073
 25,073
 
 25,073
 
Customer certificates of deposit2,089
 2,061
 
 2,061
 
Certificates of deposit2,776
 2,751
 
 2,751
 
Total deposits57,210
 57,182
 
 57,182
 
54,091
 54,066
 
 54,066
 
Short-term borrowings58
 58
 58
 
 
935
 935
 935
 
 
Acceptances outstanding3
 3
 3
 
 
4
 4
 4
 
 
Medium- and long-term debt5,583
 5,588
 
 5,588
 
6,848
 6,862
 
 6,862
 
Credit-related financial instruments(60) (60) 
 
 (60)(55) (55) 
 
 (55)
December 31, 2017         
December 31, 2018         
Assets                  
Cash and due from banks$1,438
 $1,438
 $1,438
 $
 $
$1,390
 $1,390
 $1,390
 $
 $
Interest-bearing deposits with banks4,407
 4,407
 4,407
 
 
3,171
 3,171
 3,171
 
 ���
Investment securities held-to-maturity1,266
 1,246
 
 1,246
 
Loans held-for-sale4
 4
 
 4
 
3
 3
 
 3
 
Total loans, net of allowance for loan losses (a)48,461
 48,153
 
 
 48,153
49,492
 48,889
 
 
 48,889
Customers’ liability on acceptances outstanding2
 2
 2
 
 
4
 4
 4
 
 
Restricted equity investments207
 207
 207
 
 
248
 248
 248
 
 
Nonmarketable equity securities (b)6
 9
      6
 11
      
Liabilities                  
Demand deposits (noninterest-bearing)32,071
 32,071
 
 32,071
 
28,690
 28,690
 
 28,690
 
Interest-bearing deposits23,667
 23,667
 
 23,667
 
24,740
 24,740
 
 24,740
 
Customer certificates of deposit2,165
 2,142
 
 2,142
 
Certificates of deposit2,131
 2,100
 
 2,100
 
Total deposits57,903
 57,880
 
 57,880
 
55,561
 55,530
 
 55,530
 
Short-term borrowings10
 10
 10
 
 
44
 44
 44
 
 
Acceptances outstanding2
 2
 2
 
 
4
 4
 4
 
 
Medium- and long-term debt4,622
 4,636
 
 4,636
 
6,463
 6,436
 
 6,436
 
Credit-related financial instruments(67) (67) 
 
 (67)(57) (57) 
 
 (57)
(a)Included $80$42 million and $116$35 million of impaired loans recorded at fair value on a nonrecurring basis at June 30, 2018March 31, 2019 and December 31, 2017,2018, 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.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

NOTE 3 - INVESTMENT SECURITIES
A summary of the Corporation’s investment securities follows:
(in millions)
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 Fair Value
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses
 Fair Value
June 30, 2018       
March 31, 2019       
Investment securities available-for-sale:              
U.S. Treasury and other U.S. government agency securities$2,744
 $
 $45
 $2,699
$2,742
 $19
 $5
 $2,756
Residential mortgage-backed securities (a)9,499
 10
 293
 9,216
9,533
 36
 113
 9,456
Total investment securities available-for-sale$12,243
 $10
 $338
 $11,915
$12,275
 $55
 $118
 $12,212
              
December 31, 2017       
December 31, 2018       
Investment securities available-for-sale:              
U.S. Treasury and other U.S. government agency securities$2,743
 $
 $16
 $2,727
$2,732
 $14
 $19
 $2,727
Residential mortgage-backed securities (a)8,230
 22
 128
 8,124
9,493
 22
 197
 9,318
State and municipal securities5
 
 
 5
Equity and other non-debt securities83
 1
 2
 82
Total investment securities available-for-sale (b)$11,061
 $23
 $146
 $10,938
Investment securities held-to-maturity (c):       
Residential mortgage-backed securities (a)$1,266
 $
 $20
 $1,246
Total investment securities available-for-sale$12,225
 $36
 $216
 $12,045
(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 $51 million and $49 million, respectively, as of December 31, 2017.
(c)The amortized cost of investment securities held-to-maturity included net unrealized losses of $9 million at December 31, 2017 related to securities transferred from available-for-sale in 2014, which are included in accumulated other comprehensive loss.
In connection with the adoption of ASU 2016-01 on January 1, 2018, cumulative unrealized gains and losses on available-for-sale equity and other non-debt securities were reclassified to retained earnings and the carrying value was reclassified to other short-term investments. Additionally, the Corporation transferred residential mortgage-backed securities with a book value of approximately $1.3 billion from held-to-maturity to available-for-sale upon the adoption of ASU 2017-12. For additional information about the adoption of ASU 2016-01, refer to note 1.
A summary of the Corporation’s investment securities in an unrealized loss position as of June 30, 2018March 31, 2019 and December 31, 20172018 follows:
Temporarily ImpairedTemporarily Impaired
Less than 12 Months 12 Months or more TotalLess than 12 Months 12 Months or more Total
(in millions)
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
 
Fair
Value
 
Unrealized
Losses
June 30, 2018            
March 31, 2019            
U.S. Treasury and other U.S. government agency securities$2,699
 $45
 $
 $
 $2,699
 $45
 $1,100
 $3
 $378
 $2
 $1,478
 $5
 
Residential mortgage-backed securities (a)4,544
 106
 3,934
 187
 8,478
 293
 368
 
 6,379
 113
 6,747
 113
 
Total temporarily impaired securities$7,243
 $151
 $3,934

$187
 $11,177
 $338
 $1,468
 $3
 $6,757

$115
 $8,225
 $118
 
December 31, 2017            
December 31, 2018            
U.S. Treasury and other U.S. government agency securities$2,727
 $16
 $
 $
 $2,727
 $16
 $
 $
 $1,457
 $19
 $1,457
 $19
 
Residential mortgage-backed securities (a)3,845
 32
 4,003
 125
 7,848
 157
 1,008
 9
 6,412
 188
 7,420
 197
 
State and municipal securities (b)
 
 5
 
(c) 5
 
(c)
Equity and other non-debt securities (b)
 
 44
 2
  44
 2
 
Total temporarily impaired securities$6,572
 $48
 $4,052
 $127
 $10,624
 $175
 $1,008
 $9
 $7,869
 $207
 $8,877
 $216
 
(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 June 30, 2018,March 31, 2019, the Corporation had 399324 securities in an unrealized loss position with no credit impairment, including 2913 U.S. Treasury securities and 370311 residential mortgage-backed securities. The unrealized losses for these securities resulted from changes in market interest rates and liquidity, not changes in credit quality. 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

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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 June 30, 2018.March 31, 2019.
Sales, calls and write-downs of investment securities available-for-sale resulted in the following gains and losses recorded in net securities (losses) gains on the Consolidated Statements of Comprehensive Income, computed based on the adjusted cost of the specific security.
 Three Months Ended March 31,
(in millions)2019 2018
Securities gains$
 $1
Securities losses(8) 
Net securities (losses) gains$(8) $1

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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.
(in millions)  
June 30, 2018Amortized Cost Fair Value
March 31, 2019Amortized Cost Fair Value
Contractual maturity      
Within one year$100
 $100
After one year through five years3,008
 2,963
$2,784
 $2,797
After five years through ten years1,752
 1,722
1,396
 1,390
After ten years7,383
 7,130
8,095
 8,025
Total investment securities$12,243
 $11,915
$12,275
 $12,212
Included in the contractual maturity distribution in the table above were residential mortgage-backed securities with total amortized cost of $9.5 billion and fair value of $9.2$9.5 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 June 30, 2018,March 31, 2019, investment securities with a carrying value of $393$398 million were pledged where permitted or required by law to secure $272$226 million of liabilities, primarily public and other deposits of state and local government agencies andas well as derivative instruments.

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Notes to Consolidated Financial Statements (unaudited)
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.
Loans Past Due and Still Accruing      Loans Past Due and Still Accruing      
(in millions)
30-59
Days
 
60-89 
Days
 
90 Days
or More
 Total 
Nonaccrual
Loans
 
Current
Loans
 
Total 
Loans
30-59
Days
 
60-89 
Days
 
90 Days
or More
 Total 
Nonaccrual
Loans
 
Current
Loans
 
Total 
Loans
June 30, 2018             
March 31, 2019             
Business loans:                          
Commercial$66
 $8
 $13
 $87
 $171
 $31,272
 $31,530
$58
 $16
 $19
 $93
 $114
 $31,800
 $32,007
Real estate construction:                          
Commercial Real Estate business line (a)6
 
 
 6
 
 2,882
 2,888

 
 
 
 
 2,888
 2,888
Other business lines (b)6
 
 
 6
 
 363
 369
6
 
 
 6
 
 397
 403
Total real estate construction12
 
 
 12
 
 3,245
 3,257
6
 
 
 6
 
 3,285
 3,291
Commercial mortgage:                          
Commercial Real Estate business line (a)4
 10
 
 14
 9
 1,724
 1,747
4
 
 
 4
 2
 1,733
 1,739
Other business lines (b)21
 5
 7
 33
 20
 7,324
 7,377
14
 8
 5
 27
 14
 7,209
 7,250
Total commercial mortgage25
 15
 7
 47
 29
 9,048
 9,124
18
 8
 5
 31
 16
 8,942
 8,989
Lease financing
 
 
 
 2
 456
 458

 
 
 
 2
 533
 535
International2
 
 
 2
 4
 987
 993
15
 
 
 15
 3
 1,022
 1,040
Total business loans105
 23
 20
 148
 206
 45,008
 45,362
97
 24
 24
 145
 135
 45,582
 45,862
Retail loans:                          
Residential mortgage16
 1
 
 17
 29
 1,908
 1,954
19
 2
 
 21
 37
 1,891
 1,949
Consumer:                          
Home equity4
 1
 
 5
 19
 1,707
 1,731
3
 1
 
 4
 19
 1,740
 1,763
Other consumer2
 
 
 2
 
 743
 745
1
 
 
 1
 
 727
 728
Total consumer6
 1
 
 7
 19
 2,450
 2,476
4
 1
 
 5
 19
 2,467
 2,491
Total retail loans22
 2
 
 24
 48
 4,358
 4,430
23
 3
 
 26
 56
 4,358
 4,440
Total loans$127
 $25
 $20
 $172
 $254
 $49,366
 $49,792
$120
 $27
 $24
 $171
 $191
 $49,940
 $50,302
December 31, 2017             
December 31, 2018             
Business loans:                          
Commercial$79
 $134
 $12
 $225
 $309
 $30,526
 $31,060
$34
 $26
 $8
 $68
 $141
 $31,767
 $31,976
Real estate construction:                          
Commercial Real Estate business line (a)3
 
 
 3
 
 2,627
 2,630
6
 
 
 6
 
 2,681
 2,687
Other business lines (b)4
 
 
 4
 
 327
 331
6
 
 
 6
 
 384
 390
Total real estate construction7
 
 
 7
 
 2,954
 2,961
12
 
 
 12
 
 3,065
 3,077
Commercial mortgage:                          
Commercial Real Estate business line (a)14
 
 
 14
 9
 1,808
 1,831
4
 
 
 4
 2
 1,737
 1,743
Other business lines (b)27
 6
 22
 55
 22
 7,251
 7,328
32
 5
 8
 45
 18
 7,300
 7,363
Total commercial mortgage41
 6
 22
 69
 31
 9,059
 9,159
36
 5
 8
 49
 20
 9,037
 9,106
Lease financing
 
 
 
 4
 464
 468

 
 
 
 2
 505
 507
International13
 
 
 13
 6
 964
 983

 
 
 
 3
 1,010
 1,013
Total business loans140
 140
 34
 314
 350
 43,967
 44,631
82
 31
 16
 129
 166
 45,384
 45,679
Retail loans:                          
Residential mortgage10
 2
 
 12
 31
 1,945
 1,988
11
 3
 
 14
 36
 1,920
 1,970
Consumer:                          
Home equity5
 1
 
 6
 21
 1,789
 1,816
4
 1
 
 5
 19
 1,741
 1,765
Other consumer4
 
 1
 5
 
 733
 738
1
 
 
 1
 
 748
 749
Total consumer9
 1
 1
 11
 21
 2,522
 2,554
5
 1
 
 6
 19
 2,489
 2,514
Total retail loans19
 3
 1
 23
 52
 4,467
 4,542
16
 4
 
 20
 55
 4,409
 4,484
Total loans$159
 $143
 $35
 $337
 $402
 $48,434
 $49,173
$98
 $35
 $16
 $149
 $221
 $49,793
 $50,163
(a)Primarily loans to real estate developers.
(b)Primarily loans secured by owner-occupied real estate.


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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
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.
Internally Assigned Rating  Internally Assigned Rating  
(in millions)Pass (a) 
Special
Mention (b)
 Substandard (c) Nonaccrual (d) TotalPass (a) 
Special
Mention (b)
 Substandard (c) Nonaccrual (d) Total
June 30, 2018         
March 31, 2019         
Business loans:                  
Commercial$30,185
 $580
 $594
 $171
 $31,530
$30,669
 $590
 $634
 $114
 $32,007
Real estate construction:                  
Commercial Real Estate business line (e)2,868
 20
 
 
 2,888
2,865
 23
 
 
 2,888
Other business lines (f)362
 7
 
 
 369
399
 4
 
 
 403
Total real estate construction3,230
 27
 
 
 3,257
3,264
 27
 
 
 3,291
Commercial mortgage:                  
Commercial Real Estate business line (e)1,678
 15
 45
 9
 1,747
1,678
 14
 45
 2
 1,739
Other business lines (f)7,144
 133
 80
 20
 7,377
7,003
 157
 76
 14
 7,250
Total commercial mortgage8,822
 148
 125
 29
 9,124
8,681
 171
 121
 16
 8,989
Lease financing449
 4
 3
 2
 458
522
 9
 2
 2
 535
International969
 2
 18
 4
 993
986
 38
 13
 3
 1,040
Total business loans43,655
 761
 740
 206
 45,362
44,122
 835
 770
 135
 45,862
Retail loans:                  
Residential mortgage1,925
 
 
 29
 1,954
1,911
 1
 
 37
 1,949
Consumer:                  
Home equity1,704
 
 8
 19
 1,731
1,736
 
 8
 19
 1,763
Other consumer743
 1
 1
 
 745
727
 1
 
 
 728
Total consumer2,447
 1
 9
 19
 2,476
2,463
 1
 8
 19
 2,491
Total retail loans4,372
 1
 9
 48
 4,430
4,374
 2
 8
 56
 4,440
Total loans$48,027
 $762
 $749
 $254
 $49,792
$48,496
 $837
 $778
 $191
 $50,302
December 31, 2017         
December 31, 2018         
Business loans:                  
Commercial$29,263
 $591
 $897
 $309
 $31,060
$30,817
 $464
 $554
 $141
 $31,976
Real estate construction:                  
Commercial Real Estate business line (e)2,630
 
 
 
 2,630
2,664
 23
 
 
 2,687
Other business lines (f)327
 4
 
 
 331
382
 8
 
 
 390
Total real estate construction2,957
 4
 
 
 2,961
3,046
 31
 
 
 3,077
Commercial mortgage:                  
Commercial Real Estate business line (e)1,759
 20
 43
 9
 1,831
1,682
 14
 45
 2
 1,743
Other business lines (f)7,099
 115
 92
 22
 7,328
7,157
 118
 70
 18
 7,363
Total commercial mortgage8,858
 135
 135
 31
 9,159
8,839
 132
 115
 20
 9,106
Lease financing440
 23
 1
 4
 468
500
 3
 2
 2
 507
International946
 11
 20
 6
 983
996
 4
 10
 3
 1,013
Total business loans42,464
 764
 1,053
 350
 44,631
44,198
 634
 681
 166
 45,679
Retail loans:                  
Residential mortgage1,955
 2
 
 31
 1,988
1,931
 3
 
 36
 1,970
Consumer:                  
Home equity1,786
 1
 8
 21
 1,816
1,738
 
 8
 19
 1,765
Other consumer737
 1
 
 
 738
748
 1
 
 
 749
Total consumer2,523
 2
 8
 21
 2,554
2,486
 1
 8
 19
 2,514
Total retail loans4,478
 4
 8
 52
 4,542
4,417
 4
 8
 55
 4,484
Total loans$46,942
 $768
 $1,061
 $402
 $49,173
$48,615
 $638
 $689
 $221
 $50,163
(a)Includes all loans not included in the categories of special mention, substandard or nonaccrual.
(b)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.
(c)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.
(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 - on pages F-51F-52 and F-52F-53 in the Corporation's 20172018 Annual Report. 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.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

The following table summarizes nonperforming assets.
(in millions)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Nonaccrual loans$254
 $402
$191
 $221
Reduced-rate loans (a)8
 8
7
 8
Total nonperforming loans262
 410
198
 229
Foreclosed property (b)2
 5
1
 1
Total nonperforming assets$264
 $415
$199
 $230
(a)
There were no reduced-rate business loans at both June 30, 2018March 31, 2019 and December 31, 2017.2018. Reduced-rate retail loans were $8$7 million and $8 million at both June 30, 2018March 31, 2019 and December 31, 2017.2018, respectively.
(b)Included $1 million and $4 million ofThere were no foreclosed residential real estate properties at June 30, 2018both March 31, 2019 and December 31, 2017, respectively.2018.
There were no$1 million of retail loans secured by residential real estate properties in process of foreclosure included in nonaccrual loans at both June 30, 2018March 31, 2019 and December 31, 2017.2018.
Allowance for Credit Losses
The following table details the changes in the allowance for loan losses and related loan amounts.
 2018 2017
(in millions)Business Loans Retail Loans Total Business Loans Retail Loans Total
            
Three Months Ended June 30           
Allowance for loan losses:           
Balance at beginning of period$653
 $45
 $698
 $661
 $47
 $708
Loan charge-offs(18) (2) (20) (37) (2) (39)
Recoveries on loans previously charged-off22
 1
 23
 20
 1
 21
Net loan recoveries (charge-offs)4
 (1) 3
 (17) (1) (18)
Provision for loan losses(21) (2) (23) 17
 (2) 15
Foreign currency translation adjustment(1) 
 (1) 
 
 
Balance at end of period$635
 $42
 $677
 $661
 $44
 $705
            
Six Months Ended June 30           
Allowance for loan losses:           
Balance at beginning of period$661
 $51
 $712
 $682
 $48
 $730
Loan charge-offs(54) (3) (57) (79) (4) (83)
Recoveries on loans previously charged-off30
 2
 32
 29
 3
 32
Net loan charge-offs(24) (1) (25) (50) (1) (51)
Provision for loan losses(1) (8) (9) 29
 (3) 26
Foreign currency translation adjustment(1) 
 (1) 
 
 
Balance at end of period$635
 $42
 $677
 $661
 $44
 $705
            
As a percentage of total loans1.40% 0.96% 1.36% 1.47% 0.98% 1.43%
            
June 30           
Allowance for loan losses:           
Individually evaluated for impairment$39
 $
 $39
 $93
 $1
 $94
Collectively evaluated for impairment596
 42
 638
 568
 43
 611
Total allowance for loan losses$635
 $42
 $677
 $661
 $44
 $705
Loans:           
Individually evaluated for impairment$310
 $30
 $340
 $509
 $41
 $550
Collectively evaluated for impairment45,052
 4,400
 49,452
 44,388
 4,470
 48,858
Total loans evaluated for impairment$45,362
 $4,430
 $49,792
 $44,897
 $4,511
 $49,408

16

Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

 2019 2018
(in millions)Business Loans Retail Loans Total Business Loans Retail Loans Total
            
Three Months Ended March 31           
Allowance for loan losses:           
Balance at beginning of period$627
 $44
 $671
 $661
 $51
 $712
Loan charge-offs(19) (1) (20) (36) (1) (37)
Recoveries on loans previously charged-off8
 1
 9
 8
 1
 9
Net loan charge-offs(11) 
 (11) (28) 
 (28)
Provision for loan losses(8) (5) (13) 20
 (6) 14
Balance at end of period$608
 $39
 $647
 $653
 $45
 $698
As a percentage of total loans1.33% 0.88% 1.29% 1.46% 0.99% 1.42%
            
March 31           
Allowance for loan losses:           
Individually evaluated for impairment$35
 $
 $35
 $42
 $
 $42
Collectively evaluated for impairment573
 39
 612
 611
 45
 656
Total allowance for loan losses$608
 $39
 $647
 $653
 $45
 $698
Loans:           
Individually evaluated for impairment$202
 $34
 $236
 $384
 $31
 $415
Collectively evaluated for impairment45,660
 4,406
 50,066
 44,339
 4,486
 48,825
Total loans evaluated for impairment$45,862
 $4,440
 $50,302
 $44,723
 $4,517
 $49,240
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.
Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Balance at beginning of period$40
 $46
 $42
 $41
$30
 $42
Provision for credit losses on lending-related commitments(6) 2
 (8) 7

 (2)
Balance at end of period$34
 $48
 $34
 $48
$30
 $40

14

Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Individually Evaluated Impaired Loans
The following table presents additional information regarding individually evaluated impaired loans.
Recorded Investment In:    Recorded Investment In:    
(in millions)
Impaired
Loans with
No Related
Allowance
 
Impaired
Loans with
Related
Allowance
 
Total
Impaired
Loans
 
Unpaid
Principal
Balance
 
Related
Allowance
for Loan
Losses
Impaired
Loans with
No Related
Allowance
 
Impaired
Loans with
Related
Allowance
 
Total
Impaired
Loans
 
Unpaid
Principal
Balance
 
Related
Allowance
for Loan
Losses
June 30, 2018         
March 31, 2019         
Business loans:         
Commercial$30
 $114
 $144
 $194
 $33
Commercial mortgage:         
Commercial Real Estate business line (a)39
 
 39
 49
 
Other business lines (b)2
 13
 15
 20
 2
Total commercial mortgage41
 13
 54
 69
 2
Lease financing
 1
 1
 1
 
International2
 1
 3
 9
 
Total business loans73
 129
 202
 273
 35
Retail loans:         
Residential mortgage16
 8
 24
 25
 
Consumer:         
Home equity9
 
 9
 11
 
Other consumer1
 
 1
 1
 
Total consumer10
 
 10
 12
 
Total retail loans (c)26
 8
 34
 37
 
Total individually evaluated impaired loans$99
 $137
 $236
 $310
 $35
December 31, 2018         
Business loans:                  
Commercial$85
 $154
 $239
 $313
 $35
$50
 $130
 $180
 $227
 $24
Commercial mortgage:                  
Commercial Real Estate business line (a)37
 3
 40
 49
 
39
 
 39
 49
 
Other business lines (b)
 26
 26
 29
 3
2
 16
 18
 23
 3
Total commercial mortgage37
 29
 66
 78
 3
41
 16
 57
 72
 3
International3
 2
 5
 9
 1
2
 1
 3
 8
 
Total business loans125
 185
 310
 400
 39
93
 147
 240
 307
 27
Retail loans:                  
Residential mortgage11
 8
 19
 20
 
16
 8
 24
 25
 
Consumer:                  
Home equity10
 
 10
 13
 
11
 
 11
 13
 
Other consumer1
 
 1
 1
 
1
 
 1
 1
 
Total consumer11
 
 11
 14
 
12
 
 12
 14
 
Total retail loans (c)22
 8
 30
 34
 
28
 8
 36
 39
 
Total individually evaluated impaired loans$147
 $193
 $340
 $434
 $39
$121
 $155
 $276
 $346
 $27
December 31, 2017         
Business loans:         
Commercial$105
 $267
 $372
 $460
 $63
Commercial mortgage:         
Commercial Real Estate business line (a)39
 1
 40
 49
 
Other business lines (b)3
 22
 25
 29
 3
Total commercial mortgage42
 23
 65
 78
 3
International
 6
 6
 17
 1
Total business loans147
 296
 443
 555
 67
Retail loans:         
Residential mortgage14
 8
 22
 22
 
Consumer:         
Home equity11
 
 11
 14
 
Other consumer1
 
 1
 2
 
Total consumer12
 
 12
 16
 
Total retail loans (c)26
 8
 34
 38
 
Total individually evaluated impaired loans$173
 $304
 $477
 $593
 $67
(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.

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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

The following table presents information regarding average individually evaluated impaired loans and the related interest recognized as of June 30, 2018March 31, 2019 and 2017.2018. Interest income recognized for the period primarily related to performing restructured loans.
Individually Evaluated Impaired LoansIndividually Evaluated Impaired Loans
2018 20172019 2018
(in millions)Average Balance for the Period Interest Income Recognized for the Period Average Balance for the Period Interest Income Recognized for the PeriodAverage Balance for the Period Interest Income Recognized for the Period Average Balance for the Period Interest Income Recognized for the Period
Three Months Ended June 30       
Three Months Ended March 31       
Business loans:              
Commercial$277
 $1
 $473
 $2
$162
 $1
 $344
 $1
Commercial mortgage:              
Commercial Real Estate business line (a)40
 1
 7
 
39
 1
 40
 1
Other business lines (b)25
 
 35
 
16
 
 25
 
Total commercial mortgage65
 1
 42
 
55
 1
 65
 1
Lease financing1
 
 
 
International4
 
 7
 
3
 
 5
 
Total business loans346
 2
 522
 2
221
 2
 414
 2
Retail loans:              
Residential mortgage19
 
 27
 
24
 
 20
 
Consumer loans:              
Home equity11
 
 12
 
10
 
 11
 
Other consumer1
 
 2
 
1
 
 1
 
Total consumer12
 
 14
 
11
 
 12
 
Total retail loans31
 
 41
 
35
 
 32
 
Total individually evaluated impaired loans$377
 $2
 $563
 $2
$256
 $2
 $446
 $2
Six Months Ended June 30       
Business loans:       
Commercial$309
 $2
 $487
 $4
Commercial mortgage:       
Commercial Real Estate business line (a)40
 2
 7
 
Other business lines (b)25
 
 34
 
Total commercial mortgage65
 2
 41
 
International5
 
 9
 
Total business loans379
 4
 537
 4
Retail loans:       
Residential mortgage20
 
 27
 
Consumer:       
Home equity11
 
 13
 
Other consumer1
 
 3
 
Total consumer12
 
 16
 
Total retail loans32
 
 43
 
Total individually evaluated impaired loans$411
 $4
 $580
 $4
(a)Primarily loans to real estate developers.
(b)Primarily loans secured by owner-occupied real estate.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Troubled Debt Restructurings
The following table details the recorded balance at June 30,March 31, 2019 and 2018 and 2017 of loans considered to be troubled debt restructurings (TDRs) that were restructured during the three- and six-monththree-month periods ended June 30,March 31, 2019 and 2018, and 2017, by typeall of modification. In cases of loans with more than one type of modification, the loanswhich were categorized based on the most significant modification.principal deferrals.
2018 2017
Type of Modification  Type of Modification Principal Deferrals (a)
(in millions)Principal Deferrals (a)Interest Rate ReductionsTotal Modifications Principal Deferrals (a)Interest Rate ReductionsAB Note Restructures (b)Total Modifications20192018
Three Months Ended June 30           
Three Months Ended March 31,   
Business loans:              
Commercial$25
 $
 $25
 $47
 $
 $36
$83
$12
 $28
Commercial mortgage:              
Other business lines (c)
 
 
 1
 
 
1
Other business lines (b)1
 1
Total business loans25
 
 25
 48
 
 36
84
13
 29
Retail loans:              
Consumer:              
Home equity (d)

1
 1
 
 1
 
1
Home equity (c)
 1
Total loans$25
 $1
 $26
 $48
 $1
 $36
$85
$13
 $30
Six Months Ended June 30           
Business loans:           
Commercial$45
 $
 $45
 $96
 $
 $36
$132
Commercial mortgage:           
Other business lines (c)1
 
 1
 4
 
 
4
Total business loans46
 
 46
 100
 
 36
136
Retail loans:           
Consumer:           
Home equity (d)1
 1
 2
 1
 2
 
3
Total loans$47
 $1
 $48
 $101
 $2
 $36
$139
(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 generally fully charged off.
(c)Primarily loans to secured by owner-occupied real estate.
(d)(c)Includes bankruptcy loans for which the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt.
At June 30, 2018 and December 31, 2017, commitments to lend additional funds to borrowers whose terms have been modified in TDRs totaled $44 million and $31 million, respectively.
The majority of the modifications considered to be TDRs that occurred during the six months ended June 30, 2018 and 2017 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 sixthree months ended June 30,March 31, 2019 and 2018 and 2017were insignificant.


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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

At March 31, 2019 and December 31, 2018, commitments to lend additional funds to borrowers whose terms have been modified in TDRs totaled $24 million and $20 million, respectively. On an ongoing basis, the Corporation monitors the performance of modified loans to their restructured terms. The allowance for loan losses continues to be reassessed on the basis of an individual evaluation of the loan.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

The following table presents information regarding the recorded balance at June 30, 2018March 31, 2019 and 20172018 of loans modified by principal deferral and interest rate reduction during the twelve-month periods ended June 30, 2018March 31, 2019 and 20172018.
Principal DeferralsInterest Rate ReductionsPrincipal Deferrals
(in millions)2018 20172018 20172019 2018
Balance at June 30,     
March 31   
Business loans:        
Commercial$97
 $141
$
 $
$26
 $90
Commercial mortgage:        
Commercial Real Estate business line (a)37
 1

 

 37
Other business lines (b)2
 7

 
2
 2
Total commercial mortgage39
 8

 
2
 39
Total business loans136
 149

 
28
 129
Retail loans:        
Consumer:        
Home equity (c)1
 2
2
 3
1
 2
Total principal deferrals$137
 $151
$2
 $3
Total loans$29
 $131
(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 twelve-month periods ended March 31, 2019 and 2018, loans with a carrying value of $4 million and $17 million, respectively, were modified by interest rate reduction (reduced-rate loans). There were no loans restructured into two notes (AB note restructures) during the twelve-month periodsperiod ended June 30, 2018,March 31, 2019, compared to loans with a carrying value of $68$20 million restructured during the twelve-month period ended June 30, 2017.March 31, 2018.
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. For interest rate reductions 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 defaults of principal deferrals, interest rate reductions or AB note restructures during both the three- and six-monththree-month periods ended June 30, 2018March 31, 2019 and 2017.2018.
NOTE 5 - 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 positions are monitored 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 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

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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. At June 30, 2018,March 31, 2019, counterparties with bilateral collateral agreements had pledged $3 million of marketable investment securities and deposited $10$23 million of cash with the Corporation to secure the fair value of contracts in an unrealized gain position, and the Corporation had pledged $10$12 million of marketable investment securities and posted $131$18 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

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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 June 30, 2018.March 31, 2019.
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.


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Notes to Consolidated Financial Statements (unaudited)
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 June 30, 2018March 31, 2019 and December 31, 20172018. The table excludes commitments and warrants accounted for as derivatives.
June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
  Fair Value   Fair Value  Fair Value   Fair Value
(in millions)
Notional/
Contract
Amount (a)
 Gross Derivative Assets Gross Derivative Liabilities 
Notional/
Contract
Amount (a)
 Gross Derivative Assets Gross Derivative Liabilities
Notional/
Contract
Amount (a)
 Gross Derivative Assets Gross Derivative Liabilities 
Notional/
Contract
Amount (a)
 Gross Derivative Assets Gross Derivative Liabilities
Risk management purposes         ��            
Derivatives designated as hedging instruments                      
Interest rate contracts:                      
Swaps - fair value - receive fixed/pay floating$1,775
 $
 $3
 $1,775
 $
 $2
$2,975
 $
 $2
 $2,625
 $
 $2
Swaps - cash flow - receive fixed/pay floating800
 
 
 
 
 
Derivatives used as economic hedges                      
Foreign exchange contracts:                      
Spot, forwards and swaps793
 2
 1
 650
 
 2
382
 2
 
 302
 1
 1
Total risk management purposes2,568
 2
 4
 2,425
 
 4
4,157
 2
 2
 2,927
 1
 3
Customer-initiated and other activities                      
Interest rate contracts:                      
Caps and floors written715
 
 2
 635
 
 
908
 
 1
 885
 
 1
Caps and floors purchased715
 2
 
 635
 
 
908
 1
 
 885
 1
 
Swaps12,590
 33
 112
 13,119
 57
 57
13,613
 111
 44
 13,115
 66
 67
Total interest rate contracts14,020
 35
 114
 14,389
 57
 57
15,429
 112
 45
 14,885
 67
 68
Energy contracts:                      
Caps and floors written172
 
 16
 164
 
 11
414
 
 21
 278
 
 26
Caps and floors purchased172
 16
 
 164
 11
 
414
 21
 
 278
 26
 
Swaps2,046
 161
 161
 1,519
 82
 80
1,957
 75
 72
 2,094
 163
 160
Total energy contracts2,390
 177
 177
 1,847
 93
 91
2,785
 96
 93
 2,650
 189
 186
Foreign exchange contracts:                      
Spot, forwards, options and swaps1,919
 37
 31
 1,884
 42
 38
1,289
 13
 9
 1,095
 18
 12
Total customer-initiated and other activities18,329
 249
 322
 18,120
 192
 186
19,503
 221
 147
 18,630
 274
 266
Total gross derivatives$20,897
 $251
 $326
 $20,545
 $192
 $190
$23,660
 $223
 $149
 $21,557
 $275
 $269
Amounts offset in the Consolidated Balance Sheets:                      
Netting adjustment - Offsetting derivative assets/liabilities  (48) (48)   (49) (49)  (65) (65)   (45) (45)
Netting adjustment - Cash collateral received/posted  (6) (130)   (1) (39)  (18) (18)   (174) (1)
Net derivatives included in the Consolidated Balance Sheets (b)
 197
 148
 


142
 102

 140
 66
 


56
 223
Amounts not offset in the Consolidated Balance Sheets:                      
Marketable securities pledged under bilateral collateral agreements  (3) (10)   (3) (24)  
 (10)   (1) 
Net derivatives after deducting amounts not offset in the Consolidated Balance Sheets

 $194
 $138
 

 $139
 $78


 $140
 $56
 

 $55
 $223
(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 $4$3 million and $2 million at both June 30, 2018March 31, 2019 and December 31, 2017,2018, respectively.


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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Risk Management
The Corporation's derivative instruments used for managing interest rate risk currently comprise swaps converting fixed-rate long-term debt to variable rates and variable-rate loans to fixed rates.

The following table details the effects of fair value hedging on the Consolidated Statements of Comprehensive Income.
Interest on Medium- and Long-Term DebtInterest on Medium- and Long-Term Debt
Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Total interest on medium-and long-term debt (a)$32
 $20
 $57
 $37
$51
 $25
          
Fair value hedging relationships:          
Interest rate contracts:          
Hedged items15
 23
 30
 45
26
 15
Derivatives designated as hedging instruments(2) (10) (5) (20)1
 (3)
(a) Includes the effects of hedging.
The impact of cash flow hedging was insignificant for the three months ended March 31, 2019.
The following table summarizes the expected weighted average remaining maturity of the notional amount of risk management interest rate swaps, the carrying amount of the related hedged items and the weighted average interest rates associated with amounts expected to be received or paid on interest rate swap agreements as of June 30, 2018March 31, 2019 and December 31, 20172018.
    Weighted Average    Weighted Average
(dollar amounts in millions)
Derivative Notional
Amount
 Carrying Value of Hedged Items (a) 
Remaining
Maturity
(in years)
 Receive Rate Pay Rate (b)
Derivative Notional
Amount
 Carrying Value of Hedged Items (a) 
Remaining
Maturity
(in years)
 Receive Rate Pay Rate (b)
June 30, 2018       
March 31, 2019       
Swaps - cash flow - receive fixed/pay floating rate       
Variable rate loans$800
 $800
 3.0 2.34% 2.49%
Swaps - fair value - receive fixed/pay floating rate              
Medium- and long-term debt$1,775
 $1,783
 4.1 3.26% 3.06%2,975
 3,048
 4.4 3.47
 3.56
December 31, 2017       
December 31, 2018       
Swaps - fair value - receive fixed/pay floating rate              
Medium- and long-term debt1,775
 1,822
 4.6 3.26
 2.35
2,625
 2,663
 3.9 3.40
 3.45
(a)Included $16$88 million and $56$49 million of cumulative hedging adjustments to fair value hedges at June 30, 2018March 31, 2019 and December 31, 2017,2018, respectively, which included $8$7 million and $9$8 million, respectively, of hedging adjustment on a discontinued hedging relationship.
(b)Variable rates paid on receive fixed swaps designated as fair value and cash flow hedges are based on one- and six-month LIBOR rates in effect at June 30, 2018March 31, 2019 and December 31, 2017.2018.
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. These instruments are used as economic hedges and net gains or losses are included in other noninterest income in the Consolidated Statements of Comprehensive Income.
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 no net gains or losses in other noninterest income in the Consolidated Statements of Comprehensive Income for both the three- and six-monththree-month periods ended June 30, 2018March 31, 2019 and 2017.2018.


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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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 Comprehensive Income. The net gains recognized in income on customer-initiated derivative instruments, net of the impact of offsetting positions, were as follows.
 Three Months Ended June 30, Six Months Ended June 30, Three Months Ended March 31,
(in millions) Location of Gain2018 2017 2018 2017 Location of Gain2019 2018
Interest rate contracts Other noninterest income$7
 $7
 $11
 $13
 Other noninterest income$6
 $4
Energy contracts Other noninterest income
 1
 
 1
 Other noninterest income1
 
Foreign exchange contracts Foreign exchange income12
 11
 24
 22
 Foreign exchange income11
 12
Total  $19
 $19
 $35
 $36
  $18
 $16
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)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Unused commitments to extend credit:      
Commercial and other$23,424
 $22,636
$23,629
 $24,266
Bankcard, revolving check credit and home equity loan commitments2,937
 2,833
3,054
 3,001
Total unused commitments to extend credit$26,361
 $25,469
$26,683
 $27,267
Standby letters of credit$3,236
 $3,228
$3,211
 $3,244
Commercial letters of credit48
 39
29
 39
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. The allowance for credit losses on lending-related commitments, included in accrued expenses and other liabilities on the Consolidated Balance Sheets, was $34 million and $42$30 million at June 30, 2018both March 31, 2019 and December 31, 2017, respectively.2018.
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 $24$23 million and $27$24 million at June 30, 2018March 31, 2019 and December 31, 20172018, 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 2028. 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 $127$126 million and $136 million of the $3.2 billion and $3.3 billion standby and commercial letters of credit outstanding at both June 30, 2018March 31, 2019 and December 31, 20172018., 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 $3633 million at June 30, 2018March 31, 2019, including $26 million in deferred fees and $107 million in the allowance for credit losses on lending-related commitments. At December 31, 20172018, the comparable amounts were $4034 million, $2528 million and $156 million, respectively.


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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

The following table presents a summary of criticized standby and commercial letters of credit at June 30, 2018March 31, 2019 and December 31, 20172018. The Corporation's criticized list is generally 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.


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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

(dollar amounts in millions)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Total criticized standby and commercial letters of credit$83
 $88
$50
 $49
As a percentage of total outstanding standby and commercial letters of credit2.5% 2.7%1.5% 1.5%
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 agreement reflects the pro-rata share of the derivative instrument, consistent with its share of the related participated loan. As of June 30, 2018March 31, 2019 and December 31, 2017,2018, the total notional amount of the credit risk participation agreements was approximately $586$674 million and $549$703 million, respectively, and the fair value was insignificant for both periods. 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 insignificant$12 million and $7 million at June 30, 2018March 31, 2019 and December 31, 2017.2018, 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 June 30, 2018,March 31, 2019, the weighted average remaining maturity of outstanding credit risk participation agreements was 2.73.6 years.
NOTE 6 - 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 low-income housing tax credit (LIHTC). The Corporation also directly invests in limited partnerships and LLCs which invest in community development projects which generate similar tax credits to investors (other tax credit entities). 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 June 30, 2018March 31, 2019 was limited to $409443 million. Ownership interests in 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 June 30, 2018March 31, 2019 was limited to $76 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 ($150172 million at June 30, 2018March 31, 2019). 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 Comprehensive 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 sixthree months ended June 30, 2018March 31, 2019 and 20172018.


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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

The following table summarizes the impact of these tax credit entities on line items on the Corporation’s Consolidated Statements of Comprehensive Income.
Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Other noninterest income:          
Amortization of other tax credit investments$1
 $
 $2
 $1
$1
 $1
Provision for income taxes:          
Amortization of LIHTC investments16
 16
 31
 32
15
 15
Low income housing tax credits(15) (16) (30) (31)(15) (15)
Other tax benefits related to tax credit entities(4) (6) (7) (12)(3) (3)
Total provision for income taxes$(3) $(6) $(6) $(11)$(3) $(3)
For further information on the Corporation’s consolidation policy, see noteNote 1 to the consolidated financial statements in the Corporation's 20172018 Annual Report.
NOTE 7 - MEDIUM- AND LONG-TERM DEBT
Medium- and long-term debt is summarized as follows:
(in millions)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Parent company      
Subordinated notes:      
3.80% subordinated notes due 2026 (a)$245
 $255
$256
 $250
Medium-term notes:   
Medium- and long-term notes:   
2.125% notes due 2019 (a)346
 347
349
 348
3.70% notes due 2023 (a)869
 861
4.00% notes due 2029 (a)358
 
Total medium-term notes1,576
 1,209
Total parent company591
 602
1,832
 1,459
Subsidiaries      
Subordinated notes:      
4.00% subordinated notes due 2025 (a)335
 347
349
 343
7.875% subordinated notes due 2026 (a)198
 208
200
 198
Total subordinated notes533
 555
549
 541
Medium-term notes:      
2.50% notes due 2020 (a)659
 665
667
 663
Federal Home Loan Bank (FHLB) advances:      
Floating-rate based on FHLB auction rate due 20262,800
 2,800
2,800
 2,800
Floating-rate based on FHLB auction rate due 20281,000
 
1,000
 1,000
Total FHLB advances3,800
 2,800
3,800
 3,800
Total subsidiaries4,992
 4,020
5,016
 5,004
Total medium- and long-term debt$5,583
 $4,622
$6,848
 $6,463
(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.
Subordinated notes with remaining maturities greater than one year qualify as Tier 2 capital.
Comerica Bank (the Bank), a wholly-owned subsidiary of the Corporation, is a member of the FHLB, which provides short- and long-term funding to its members through advances collateralized by real estate-related assets. On February 7, 2018, the Bank borrowed an additional $1.0 billion of 10-year, floating-rate FHLB advances due January 26, 2028. The interest rate on the FHLB advances resets between four and eight weeks, based on the FHLB auction rate. At June 30, 2018,March 31, 2019, the weighted-average rate on the FHLB advances was 2.06%2.60%. Each note may be prepaid in full, without penalty, at each scheduled reset date. Borrowing capacity is contingent on the amount of collateral available to be pledged to the FHLB. At June 30, 2018, $16.0March 31, 2019, $16.3 billion of real estate-related loans were pledged to the FHLB as blanket collateral for current and potential future borrowings of approximately $5.5$4.6 billion.
Unamortized debt issuance costs deducted fromOn February 1, 2019, the carrying amountCorporation issued $350 million of medium- and long-term debt totaled $4 million4.00% senior notes maturing in 2029, swapped to a floating rate at June 30, 2018 and $5 million at December 31, 2017.30-day LIBOR plus 129 basis points.

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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Unamortized debt issuance costs deducted from the carrying amount of medium- and long-term debt totaled $10 million at March 31, 2019 and $8 million at December 31, 2018.
NOTE 8 - ACCUMULATED OTHER COMPREHENSIVE LOSS
The following table presents a reconciliation of the changes in the components of accumulated other comprehensive loss and details the components of other comprehensive income (loss) for the sixthree months ended June 30, 2018March 31, 2019 and 20172018, including the amount of income tax expense (benefit) allocated to each component of other comprehensive income (loss).
Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 20172019 2018
Accumulated net unrealized losses on investment securities:      
Balance at beginning of period, net of tax$(101) $(33)$(138) $(101)
      
Cumulative effect of change in accounting principle1
 

 1
      
Net unrealized holding (losses) gains arising during the period(197) 21
Less: (Benefit) provision for income taxes(46) 8
Net unrealized holding (losses) gains arising during the period, net of tax(151) 13
Net unrealized holding gains (losses) arising during the period109
 (142)
Less: Provision (benefit) for income taxes25
 (33)
Net unrealized holding gains (losses) arising during the period, net of tax84
 (109)
Less:      
Reclassification adjustment for net losses realized as a yield adjustment included in net income, net of tax

 (1)
Change in net unrealized losses on investment securities, net of tax(151) 14
Net realized losses included in net securities losses(8) 
Less: Benefit for income taxes(2) 
Reclassification adjustment for net securities losses included in net income, net of tax(6) 
Change in net unrealized gains (losses) on investment securities, net of tax90
 (109)
Balance at end of period, net of tax$(48) $(209)
   
Accumulated net gains on cash flow hedges:   
Balance at beginning of period, net of tax$
 $
   
Net cash flow hedge gains arising during the period4
 
Less: Provision for income taxes1
 
Change in net cash flow hedge gains, net of tax3
 
Balance at end of period, net of tax$(251) $(19)$3
 $
      
Accumulated defined benefit pension and other postretirement plans adjustment:      
Balance at beginning of period, net of tax$(350) $(350)$(471) $(350)
      
Amortization of actuarial net loss30
 25
11
 15
Amortization of prior service credit(14) (13)(7) (7)
Amounts recognized in other noninterest expense16
 12
4
 8
Less: Provision for income taxes4
 4
1
 2
Change in defined benefit pension and other postretirement plans adjustment, net of tax12
 8
3
 6
Balance at end of period, net of tax$(338) $(342)$(468) $(344)
Total accumulated other comprehensive loss at end of period, net of tax$(589) $(361)$(513) $(553)

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Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

NOTE 9 - NET INCOME PER COMMON SHARE
Basic and diluted net income per common share are presented in the following table.
Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31, 2019
(in millions, except per share data)2018 2017 2018 20172019 2018
Basic and diluted          
Net income$326
 $203
 $607
 $405
$339
 $281
Less:       
Income allocated to participating securities2
 1
 4
 3
Less: Income allocated to participating securities2
 2
Net income attributable to common shares$324
 $202
 $603
 $402
$337
 $279
          
Basic average common shares171
 175
 171
 175
158
 172
          
Basic net income per common share$1.90
 $1.15
 $3.52
 $2.30
$2.14
 $1.62
          
Basic average common shares171
 175
 171
 175
158
 172
Dilutive common stock equivalents:          
Net effect of the assumed exercise of stock options2
 3
 2
 3
2
 2
Net effect of the assumed exercise of warrants1
 1
 1
 2

 1
Diluted average common shares174
 179
 174
 180
160
 175
          
Diluted net income per common share$1.87
 $1.13
 $3.46
 $2.24
$2.11
 $1.59
ThereThe following average shares related to outstanding options to purchase shares of common stock were nonot included in the computation of diluted net income per common share because the options were anti-dilutive options for any of the three- and six-month periods ended June 30, 2018 and 2017.


period.
27

 Three Months Ended March 31, 2019
(shares in millions)2019 2018
Average outstanding options0.42
 
Range of exercise prices$80.17 - $95.25 
Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

NOTE 10 - EMPLOYEE BENEFIT PLANS
Net periodic defined benefit cost (credit) comprise servicesservice cost and other components of net benefit cost (credit). Service costs are included in salaries and benefits expense and other components of net benefit cost (credit) are included in other noninterest expenses on the Consolidated Statements of Comprehensive Income. For further information on the Corporation's employee benefit plans, refer to noteNote 17 to the consolidated financial statements in the Corporation's 20172018 Annual Report.
The components of net periodic benefit cost (credit) for the Corporation's qualified pension plan, non-qualified pension plan and postretirement benefit plan are as follows.
Qualified Defined Benefit Pension PlanThree Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Service cost$8
 $7
 $15
 $14
$8
 $7
          
Other components of net benefit credit:          
Interest cost18
 19
 37
 39
20
 19
Expected return on plan assets(41) (39) (82) (79)(42) (41)
Amortization of prior service credit(4) (4) (9) (9)(5) (5)
Amortization of net loss12
 10
 25
 21
9
 13
Total other components of net benefit credit(15) (14) (29) (28)(18) (14)
Net periodic defined benefit credit$(7) $(7) $(14) $(14)$(10) $(7)

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Non-Qualified Defined Benefit Pension PlanThree Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Service cost$1
 $
 $1
 $1
$1
 $
          
Other components of net benefit cost:          
Interest cost2
 2
 4
 4
2
 2
Amortization of prior service credit(3) (2) (5) (4)(2) (2)
Amortization of net loss3
 2
 5
 4
2
 2
Total other components of net benefit cost2
 2
 4
 4
2
 2
Net periodic defined benefit cost$3
 $2
 $5
 $5
$3
 $2
Postretirement Benefit PlanThree Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Other components of net benefit credit:          
Interest cost$
 $
 $1
 $1
$1
 $1
Expected return on plan assets(1) 
 (2) (1)(1) (1)
Net periodic defined benefit credit$(1) $
 $(1) $
$
 $
NOTE 11 - INCOME TAXES AND TAX-RELATED ITEMS
NetAt March 31, 2019, net unrecognized tax benefits were $10$15 million, compared to $14 million at both June 30, 2018 and December 31, 2017.2018. The Corporation anticipates it is reasonably possible that final settlements with tax authorities will result in a $1 million decrease in net unrecognized tax benefits of $1 million within the next twelve months. The liability for tax-related interest and penalties included in accrued expenses and other liabilities was $10$7 million at both June 30, 2018March 31, 2019 and December 31, 2017.2018.
Net deferred tax assets were $169$145 million at June 30, 2018,March 31, 2019, compared to $141$166 million at December 31, 2017.2018. The $28$21 million increasedecrease in net deferred tax assets resulted primarily from an increasea decrease in deferred tax assets related to unrealized losses on investment securities available-for-sale and the allowance for loan losses, partially offset by the decrease in the allowance for loan losses and an increase into deferred tax liabilities related to defined benefit pension plans.lease financing transactions and the allowance for depreciation. Included in deferred tax assets at both June 30, 2018March 31, 2019 and December 31, 20172018 were $4 million of state net operating loss carryforwards, which expire between 20182019 and 2027.2028. The Corporation believes it is more likely than not 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 June 30, 2018March 31, 2019 and December 31, 2017.2018.
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) or other tax jurisdictions may review and/or challenge specific interpretive tax positions taken by the Corporation with respect to those transactions. The Corporation believes its tax returns were filed based upon applicable statutes, regulations and case law in effect at the time of the transactions. The IRS or other tax jurisdictions, an administrative authority or a court, if presented with the transactions, could disagree with the Corporation’s interpretation of the tax law.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Based on current knowledge and probability assessment of various potential outcomes, the Corporation believes the 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.
NOTE 12 - CONTINGENT LIABILITIES
Legal Proceedings
As previously reported in the Corporation's Form 10-K for the year ended December 31, 2017 and Form 10-Q for2018, the period ended March 31, 2018, 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”)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, and the Corporation awaits a ruling. Management believes 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

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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 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, results of operations or cash flows. Legal fees of $4$1 million and $5$3 million for the three-month periods ended March 31, 2019 and 2018, respectively, were included in other noninterest expenses foron the three-month periods ended June 30, 2018 and 2017, respectively, and $7 million and $10 million for the six-month periods ended June 30, 2018 and 2017, respectively.Consolidated Statements of Comprehensive 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 $33$34 million at June 30, 2018.March 31, 2019. This estimated aggregate range of reasonably 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 an estimate can currently be made. The Corporation’s estimate involves significant judgment, given the varying stages of the proceedings (including the fact 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 the ultimate resolution of these matters, if unfavorable, may be material to the Corporation's consolidated financial condition, results of operations or cash flows.
For information regarding income tax contingencies, refer to note 11.Note 11.
NOTE 13 - RESTRUCTURING CHARGES
The Corporation launched an initiative in 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 banking centers as well as reducing office and operations space, selective outsourcing of technology functions, reduction of technology system applications, enhanced sales tools and training, expanded product offerings and improved customer analytics to drive opportunities.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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 Comprehensive Income. The following table presents changes in restructuring reserves, cumulative charges incurred to date and total expected restructuring charges:
(in millions)Employee Costs Facilities Costs Technology Costs Other Costs Total
          
Three Months Ended June 30, 2018         
Balance at beginning of period$10
 $
 $9
 $
 $19
Restructuring charges
 1
 10
 
 11
Payments(6) (1) (8) 
 (15)
Balance at end of period$4
 $
 $11
 $
 $15
          
Three Months Ended June 30, 2017         
Balance at beginning of period$7
 $
 $3
 $3
 $13
Restructuring charges3
 4
 6
 1
 14
Payments(4) (4) (4) (2) (14)
Adjustments for non-cash charges (a)
 
 (2) 
 (2)
Balance at end of period$6
 $
 $3
 $2
 $11
          
Six Months Ended June 30, 2018         
Balance at beginning of period$8
 $
 $6
 $1
 $15
Restructuring charges5
 2
 20
 
 27
Payments(9) (2) (15) (1) (27)
Balance at end of period$4
 $
 $11
 $
 $15
          
Six Months Ended June 30, 2017         
Balance at beginning of period$10
 $4
 $
 $4
 $18
Restructuring charges4
 5
 12
 4
 25
Payments(8) (9) (4) (6) (27)
Adjustments for non-cash charges (a)
 
 (5) 
 (5)
Balance at end of period$6
 $
 $3
 $2
 $11
          
Total restructuring charges incurred to date$67
 $19
 $46
 $33
 $165
Total expected restructuring charges (b)70
 20
 60 - 65
 35
 185 - 190
(a)Adjustments for non-cash charges primarily relate to impairments of previously capitalized software costs in Technology 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 22 to the consolidated financial statements in the Corporation's 2017 Annual Report. Total restructuring charges assigned to the Business Bank, Retail Bank and Wealth Management were $6 million, $4 million and $1 million, respectively, for the three months ended June 30, 2018 and $15 million, $9 million, and $3 million, respectively, for six months ended June 30, 2018. Total restructuring charges assigned to the Business Bank, Retail Bank and Wealth Management were $7 million, $4 million, and $3 million, respectively, for the three months ended June 30, 2017 and $13 million, $8 million, and $4 million, respectively, for the six months ended June 30, 2017. Remaining expected restructuring charges will be assigned to the business segments using the same methodology. Facilities costs pertaining to the consolidation of banking centers primarily impacted the Retail Bank.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

NOTE 1413 - 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 June 30, 2018March 31, 2019.
The following discussion provides information about the activities of each business segment. A discussion of the financial results and the factors impacting performance can be found in the section entitled "Business Segments" in the financial review.
The Business Bank meets the needs of small and 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 anda full range of 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 business customers, thisThis 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.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

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.
For further information on the methodologies which form the basis for these results refer to noteNote 23 to the consolidated financial statements in the Corporation's 20172018 Annual Report.

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Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Business segment financial results are as follows:
(dollar amounts in millions)Business
Bank
 Retail
Bank
 Wealth Management Finance Other Total
Three Months Ended June 30, 2018     
Earnings summary:           
Net interest income$341
 $169
 $40
 $26
 $14
 $590
Provision for credit losses(17) (9) 1
 
 (4) (29)
Noninterest income126
 42
 67
 12
 1
 248
Noninterest expenses182
 178
 75
 (1) 14
 448
Provision for income taxes68
 10
 7
 6
 2
(a)93
Net income$234
 $32
 $24
 $33
 $3
 $326
Net credit-related charge-offs (recoveries)$
 $(4) $1
 $
 $
 $(3)
            
Selected average balances:           
Assets$39,961
 $6,412
 $5,260
 $13,735
 $5,152
 $70,520
Loans38,332
 5,766
 5,127
 
 
 49,225
Deposits26,582
 24,161
 3,852
 1,093
 142
 55,830
            
Statistical data:           
Return on average assets (b)2.34% 0.52% 1.90% N/M
 N/M
 1.85%
Efficiency ratio (c)39.00
 84.05
 69.03
 N/M
 N/M
 53.24
Business
Bank
 Retail
Bank
 Wealth Management Finance Other Total
(dollar amounts in millions)Business
Bank
 Retail
Bank
 Wealth Management Finance Other Total 
Three Months Ended June 30, 2017 
Three Months Ended March 31, 2019           
Earnings summary:                      
Net interest income (expense)$336
 $162
 $42
 $(49) $9
 $500
$412
 $146
 $47
 $(15) $16
 $606
Provision for credit losses12
 5
 (2) 
 2
 17
(6) (4) (5) 
 2
 (13)
Noninterest income152
 48
 64
 10
 2
 276
136
 31
 64
 4
 3
 238
Noninterest expenses196
 180
 71
 (1) 11
 457
198
 145
 72
 
 18
 433
Provision (benefit) for income taxes100
 9
 14
 (17) (7)(a)99
82
 8
 11
 (4) (12)(a)85
Net income (loss)$180
 $16
 $23
 $(21) $5
 $203
$274
 $28
 $33
 $(7) $11
 $339
Net credit-related charge-offs (recoveries)$10
 $9
 $(1) $
 $
 $18
$12
 $
 $(1) $
 $
 $11
                      
Selected average balances:                      
Assets$38,881
 $6,487
 $5,432
 $13,936
 $6,610
 $71,346
$43,909
 $2,812
 $5,174
 $13,911
 $3,965
 $69,771
Loans37,580
 5,865
 5,278
 
 
 48,723
42,538
 2,103
 5,036
 
 
 49,677
Deposits28,748
 23,935
 4,106
 156
 183
 57,128
28,463
 20,470
 3,801
 1,130
 132
 53,996
                      
Statistical data:                      
Return on average assets (b)1.85% 0.27% 1.76% N/M
 N/M
 1.14%2.53% 0.54% 2.67% n/m
 n/m
 1.97%
Efficiency ratio (c)40.25
 84.80
 66.44
 N/M
 N/M
 58.70
36.23
 81.12
 64.41
 n/m
 n/m
 50.81
           
Three Months Ended March 31, 2018           
Earnings summary:           
Net interest income (expense)$381
 $127
 $43
 $(14) $12
 $549
Provision for credit losses16
 (2) (4) 
 2
 12
Noninterest income131
 33
 67
 11
 2
 244
Noninterest expenses213
 148
 72
 (1) 14
 446
Provision (benefit) for income taxes65
 3
 10
 (3) (21)(a)54
Net income$218
 $11
 $32
 $1
 $19
 $281
Net credit-related charge-offs (recoveries)$30
 $
 $(2) $
 $
 $28
           
Selected average balances:           
Assets$42,706
 $2,632
 $5,373
 $13,779
 $5,836
 $70,326
Loans41,102
 2,073
 5,246
 
 
 48,421
Deposits30,485
 20,893
 3,796
 823
 93
 56,090
           
Statistical data:           
Return on average assets (b)2.07% 0.20% 2.42% n/m
 n/m
 1.62%
Efficiency ratio (c)41.55
 92.16
 65.81
 n/m
 n/m
 56.33
(a)Included discrete tax benefits from employee stock transactions of $3$11 million and $5$22 million for the three months ended June 30,March 31, 2019 and 2018, and 2017, respectively.
(b)Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.
(c)Noninterest expenses as a percentage of the sum of net interest income and noninterest income excluding net securities gains (losses) from securities and a derivative contract tied to the conversion rate of Visa Class B shares.
N/Mn/m – not meaningful



3228

Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

(dollar amounts in millions)Business
Bank
 Retail
Bank
 Wealth Management Finance Other Total
Six Months Ended June 30, 2018     
Earnings summary:           
Net interest income$671
 $334
 $81
 $27
 $26
 $1,139
Provision for credit losses(7) (5) (3) 
 (2) (17)
Noninterest income247
 84
 135
 23
 3
 492
Noninterest expenses366
 355
 147
 (2) 28
 894
Provision (benefit) for income taxes127
 16
 17
 7
 (20)(a)147
Net income$432
 $52
 $55
 $45
 $23
 $607
Net credit-related charge-offs (recoveries)$18
 $8
 $(1) $
 $
 $25
            
Selected average balances:           
Assets$39,438
 $6,420
 $5,316
 $13,757
 $5,492
 $70,423
Loans37,853
 5,786
 5,186
 
 
 48,825
Deposits26,946
 24,112
 3,824
 959
 118
 55,959
            
Statistical data:           
Return on average assets (b)2.21% 0.42% 2.10% N/M
 N/M
 1.74%
Efficiency ratio (c)39.85
 84.54
 68.06
 N/M
 N/M
 54.74

(dollar amounts in millions)Business
Bank
 Retail
Bank
 Wealth Management Finance Other Total
Six Months Ended June 30, 2017     
Earnings summary:           
Net interest income (expense)$668
 $322
 $83
 $(120) $17
 $970
Provision for credit losses22
 17
 (3) 
 (3) 33
Noninterest income296
 96
 128
 21
 6
 547
Noninterest expenses393
 359
 141
 (2) 23
 914
Provision (benefit) for income taxes192
 15
 27
 (41) (28)(a)165
Net income$357
 $27
 $46
 $(56) $31
 $405
Net credit-related charge-offs (recoveries)$40
 $14
 $(3) $
 $
 $51
            
Selected average balances:           
Assets$38,488
 $6,506
 $5,419
 $13,940
 $7,228
 $71,581
Loans37,169
 5,880
 5,264
 
 
 48,313
Deposits29,196
 23,866
 4,042
 149
 199
 57,452
            
Statistical data:           
Return on average assets (b)1.87% 0.22% 1.73% N/M
 N/M
 1.14%
Efficiency ratio (c)40.82
 85.40
 66.81
 N/M
 N/M
 60.17
(a)Included tax benefits from employee stock transactions of $22 million and $29 million for the six months ended June 30, 2018 and 2017, respectively.
(b)Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.
(c)Noninterest expenses as a percentage of the sum of net interest income and noninterest income excluding net securities gains (losses) and a derivative contract tied to the conversion rate of Visa Class B shares.
N/M – not meaningful
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 June 30, 2018.March 31, 2019.
A discussion of the financial results and the factors impacting performance can be found in the section entitled "Market Segments" in the financial review.

33

Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

Market segment financial results are as follows:
(dollar amounts in millions)Michigan California Texas Other
Markets
 Finance
& Other
 Total
Three Months Ended June 30, 2018
Earnings summary:           
Net interest income$167
 $183
 $117
 $83
 $40
 $590
Provision for credit losses1
 (9) (15) (2) (4) (29)
Noninterest income73
 42
 30
 90
 13
 248
Noninterest expenses144
 105
 92
 94
 13
 448
Provision for income taxes22
 32
 16
 15
 8
(a)93
Net income$73
 $97
 $54
 $66
 $36
 $326
Net credit-related charge-offs (recoveries)$
 $
 $3
 $(6) $
 $(3)
            
Selected average balances:           
Assets$13,427
 $18,697
 $10,439
 $9,070
 $18,887
 $70,520
Loans12,641
 18,435
 9,862
 8,287
 
 49,225
Deposits20,904
 16,642
 8,967
 8,082
 1,235
 55,830
            
Statistical data:           
Return on average assets (b)1.37% 2.06% 2.08% 2.93% N/M
 1.85%
Efficiency ratio (c)59.77
 46.94
 62.17
 53.72
 N/M
 53.24
(dollar amounts in millions)Michigan California Texas Other
Markets
 Finance
& Other
 Total
Three Months Ended June 30, 2017
Earnings summary:           
Net interest income (expense)$167
 $178
 $113
 $82
 $(40) $500
Provision for credit losses(2) 24
 (15) 8
 2
 17
Noninterest income81
 45
 33
 105
 12
 276
Noninterest expenses145
 98
 94
 110
 10
 457
Provision (benefit) for income taxes38
 40
 25
 20
 (24)(a)99
Net income (loss)$67
 $61
 $42
 $49
 $(16) $203
Net credit-related charge-offs (recoveries)$(1) $8
 $5
 $6
 $
 $18
            
Selected average balances:           
Assets$13,371
 $18,474
 $10,481
 $8,474
 $20,546
 $71,346
Loans12,712
 18,194
 10,015
 7,802
 
 48,723
Deposits21,698
 17,344
 9,632
 8,115
 339
 57,128
            
Statistical data:           
Return on average assets (b)1.20% 1.33% 1.52% 2.24% N/M
 1.14%
Efficiency ratio (c)58.18
 43.85
 64.39
 58.59
 N/M
 58.70
(a)
Included tax benefits from employee stock transactions of $3 million and $5 millionfor the three months ended June 30, 2018 and 2017, respectively.
(b)Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.
(c)Noninterest expenses as a percentage of the sum of net interest income and noninterest income excluding net securities gains (losses) and a derivative contract tied to the conversion rate of Visa Class B shares.
N/M – not meaningful

34

Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

(dollar amounts in millions)Michigan California Texas Other
Markets
 Finance
& Other
 Total
Six Months Ended June 30, 2018
Earnings summary:           
Net interest income$336
 $363
 $226
 $161
 $53
 $1,139
Provision for credit losses34
 (11) (28) (10) (2) (17)
Noninterest income146
 81
 61
 178
 26
 492
Noninterest expenses288
 211
 184
 185
 26
 894
Provision (benefit) for income taxes38
 62
 30
 30
 (13)(a)147
Net income$122
 $182
 $101
 $134
 $68
 $607
Net credit-related charge-offs (recoveries)$(1) $13
 $8
 $5
 $
 $25
            
Selected average balances:           
Assets$13,411
 $18,639
 $10,406
 $8,718
 $19,249
 $70,423
Loans12,623
 18,391
 9,846
 7,965
 
 48,825
Deposits21,064
 16,865
 9,077
 7,876
 1,077
 55,959
            
Statistical data:           
Return on average assets (b)1.13% 1.96% 1.96% 3.11% N/M
 1.74%
Efficiency ratio (c)59.64
 47.66
 63.85
 54.41
 N/M
 54.74
Michigan California Texas Other
Markets
 Finance
& Other
 Total
(dollar amounts in millions)Michigan California Texas Other
Markets
 Finance
& Other
 Total 
Six Months Ended June 30, 2017
Three Months Ended March 31, 2019           
Earnings summary:                      
Net interest income (expense)$337
 $349
 $226
 $161
 $(103) $970
Net interest income$187
 $205
 $122
 $91
 $1
 $606
Provision for credit losses(4) 45
 (24) 19
 (3) 33
5
 (1) (11) (8) 2
 (13)
Noninterest income164
 86
 65
 205
 27
 547
71
 41
 32
 87
 7
 238
Noninterest expenses295
 194
 188
 216
 21
 914
140
 100
 84
 91
 18
 433
Provision (benefit) for income taxes75
 76
 47
 36
 (69)(a)165
26
 37
 19
 19
 (16)(a)85
Net income (loss)$135
 $120
 $80
 $95
 $(25) $405
Net income$87
 $110
 $62
 $76
 $4
 $339
Net credit-related charge-offs (recoveries)$(4) $18
 $27
 $10
 $
 $51
$4
 $(3) $13
 $(3) $
 $11
                      
Selected average balances:                      
Assets$13,313
 $18,217
 $10,518
 $8,365
 $21,168
 $71,581
$13,075
 $19,048
 $10,920
 $8,852
 $17,876
 $69,771
Loans12,650
 17,938
 10,062
 7,663
 
 48,313
12,557
 18,768
 10,270
 8,082
 
 49,677
Deposits21,923
 17,294
 9,871
 8,016
 348
 57,452
19,893
 16,245
 8,698
 7,898
 1,262
 53,996
                      
Statistical data:                      
Return on average assets (b)1.20% 1.33% 1.44% 2.17% N/M
 1.14%1.74% 2.32% 2.30% 3.48% n/m
 1.97%
Efficiency ratio (c)58.79
 44.53
 64.59
 59.01
 N/M
 60.17
53.82
 40.85
 54.60
 50.99
 n/m
 50.81
           
Three Months Ended March 31, 2018           
Earnings summary:           
Net interest income (expense)$175
 $188
 $111
 $78
 $(3) $549
Provision for credit losses34
 (2) (14) (8) 2
 12
Noninterest income73
 39
 31
 88
 13
 244
Noninterest expenses144
 106
 92
 91
 13
 446
Provision (benefit) for income taxes17
 32
 15
 15
 (25)(a)54
Net income$53
 $91
 $49
 $68
 $20
 $281
Net credit-related (recoveries) charge-offs$(1) $13
 $5
 $11
 $
 $28
           
Selected average balances:           
Assets$13,395
 $18,582
 $10,373
 $8,361
 $19,615
 $70,326
Loans12,604
 18,347
 9,830
 7,640
 
 48,421
Deposits21,224
 17,091
 9,188
 7,670
 917
 56,090
           
Statistical data:           
Return on average assets (b)0.98% 1.98% 1.91% 3.32% n/m
 1.62%
Efficiency ratio (c)57.99
 46.82
 64.71
 54.98
 n/m
 56.33
(a)Included discrete tax benefits from employee stock transactions of $22$11 million and $29$22 million for the sixthree months ended June 30,March 31, 2019 and 2018, and 2017, respectively.
(b)Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.
(c)Noninterest expenses as a percentage of the sum of net interest income and noninterest income excluding net securities gains (losses) from securities and a derivative contract tied to the conversion rate of Visa Class B shares.
N/Mn/m – not meaningful



3529

Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

NOTE 1514 - REVENUE FROM CONTRACTS WITH CUSTOMERS
Revenue from contracts with customers comprises the noninterest income earned by the Corporation in exchange for services provided to customers. The following table presents the composition of revenue from contracts with customers, segregated from other sources of noninterest income, by business segment.
Business
Bank
 
Retail
Bank
 Wealth Management Finance & Other Total
Business
Bank
 
Retail
Bank
 Wealth Management Finance & Other Total
(in millions)
Three Months Ended June 30, 2018         
Three Months Ended March 31, 2019         
Revenue from contracts with customers:                  
Card fees (a)$47
 $12
 $1
 $
 $60
Service charges on deposit accounts (a)28
 23
 2
 
 53
Card fees$53
 $9
 $1
 $
 $63
Service charges on deposit accounts33
 17
 1
 
 51
Fiduciary income
 
 52
 
 52

 
 49
 
 49
Commercial loan servicing fees (b)5
 
 
 
 5
Commercial loan servicing fees (a)4
 
 
 
 4
Brokerage fees
 
 6
 
 6

 
 7
 
 7
Other noninterest income (c)3
 3
 5
 
 11
Other noninterest income (b)2
 3
 5
 
 10
Total revenue from contracts with customers83
 38
 66
 
 187
92
 29
 63
 
 184
Other sources of noninterest income43
 4
 1
 13
 61
44
 2
 1
 7
 54
Total noninterest income$126
 $42
 $67
 $13
 $248
$136
 $31
 $64
 $7
 $238
                  
Three Months Ended June 30, 2017         
Three Months Ended March 31, 2018         
Revenue from contracts with customers:                  
Card fees$65
 $14
 $1
 $
 $80
$49
 $9
 $1
 $
 $59
Service charges on deposit accounts30
 25
 2
 
 57
35
 18
 1
 
 54
Fiduciary income
 
 51
 
 51

 
 52
 
 52
Commercial loan servicing fees (b)6
 
 
 
 6
Commercial loan servicing fees (a)4
 
 
 
 4
Brokerage fees
 
 6
 
 6

 
 7
 
 7
Other noninterest income (c)2
 7
 3
 
 12
Other noninterest income (b)4
 5
 4
 
 13
Total revenue from contracts with customers103
 46
 63
 
 212
92
 32
 65
 
 189
Other sources of noninterest income49
 2
 1
 12
 64
39
 1
 2
 13
 55
Total noninterest income$152
 $48
 $64
 $12
 $276
$131
 $33
 $67
 $13
 $244
         
Six Months Ended June 30, 2018         
Revenue from contracts with customers:         
Card fees (a)$94
 $23
 $2
 $
 $119
Service charges on deposit accounts (a)58
 46
 3
 
 107
Fiduciary income
 
 104
 
 104
Commercial loan servicing fees (b)9
 
 
 
 9
Brokerage fees
 
 13
 
 13
Other noninterest income (c)6
 8
 9
 
 23
Total revenue from contracts with customers167
 77
 131
 
 375
Other sources of noninterest income80
 7
 4
 26
 117
Total noninterest income$247
 $84
 $135
 $26
 $492
         
Six Months Ended June 30, 2017         
Revenue from contracts with customers:         
Card fees$129
 $26
 $2
 $
 $157
Service charges on deposit accounts62
 50
 3
 
 115
Fiduciary income
 
 100
 
 100
Commercial loan servicing fees (b)9
 
 
 
 9
Brokerage fees
 
 11
 
 11
Other noninterest income (c)6
 15
 8
 
 29
Total revenue from contracts with customers206
 91
 124
 
 421
Other sources of noninterest income90
 5
 4
 27
 126
Total noninterest income$296
 $96
 $128
 $27
 $547
(a)Included in commercial lending fees on the Consolidated Statements of Comprehensive Income.
(b)Excludes derivative, warrant and other miscellaneous income.
(a) Adoption of Topic 606 resulted in a change in presentation which records certain costs inAdjustments to revenue during the same category as the associated revenues.
The effect of this change was to reduce card fees by $37 million and $71 million and service charges on deposit accounts by $1 million
and 2 million for three- and six-monththree-month periods ended June 30,March 31, 2019 and 2018 respectively. Referfor refunds or credits relating to note 1 for further information.prior periods were not significant.
(b) Included in commercial lending fees on the Consolidated Statements of Comprehensive Income.
(c) Excludes derivative, warrantRevenue from contracts with customers did not generate significant contract assets and other miscellaneous income.

36

Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

liabilities.
          
Adjustments to revenue
NOTE 15 - LEASES
As a lessee, the Corporation has entered into operating leases for the majority of its real estate locations, primarily retail and office space. The Corporation recognized total lease expense of $19 million, including $15 million of operating lease expense and $4 million of variable lease expense, for the three months ended March 31, 2019.
At March 31, 2019, the Corporation's ROU assets and operating lease liabilities were $318 million and $355 million, respectively. The weighted average lease term for the lease liabilities was 9 years, and the weighted average discount rate of remaining payments was 3.93 percent. Lease liabilities from new ROU assets obtained during the three- and six-month periodsthree months ended June 30, 2018March 31, 2019 totaled $4 million. Cash paid on operating lease liabilities was $16 million for refunds or credits relating to prior periods were not significant.
Revenue from contracts with customers did not generate significant contract assets and liabilities.the three months ended March 31, 2019.

30

Table of Contents
Notes to Consolidated Financial Statements (unaudited)
Comerica Incorporated and Subsidiaries

As of March 31, 2019, the contractual maturities of operating lease liabilities were as follows:
(in millions) 
Years Ending December 31 
2019 (a)$43
202063
202155
202246
202339
Thereafter182
Total contractual maturities428
Less imputed interest(73)
Total operating lease liabilities$355
(a) Contractual maturities for the nine months remaining in 2019.
As a lessor, the Corporation leases certain types of manufacturing and warehouse equipment as well as public and private transportation vehicles to its customers. The Corporation recognized $3 million of lease-related revenue, primarily interest income from sales-type and direct financing leases, for the three months ended March 31, 2019. At March 31, 2019, the Corporation's net investment in sales-type and direct financing leases was $320 million.
As of March 31, 2019, the contractual maturities of sales-type and direct financing lease receivables were as follows:
(in millions) 
Years Ending December 31 
2019 (a)$65
202066
202154
202248
202342
Thereafter68
Total lease payments receivable343
Less deferred interest income(23)
Total lease receivables (b)$320
(a) Contractual maturities for the nine months remaining in 2019.
(b) Includes unguaranteed residual values of $60 million and excludes net investment in leveraged leases of $215 million.


ITEM 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations
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 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 track," "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. These forward-looking statements are predicated on the beliefs and assumptions of the Corporation's management based on information known to the Corporation's management as of the date of this report and do not purport to speak as of any other date. Forward-looking statements may include descriptions of plans and objectives of the Corporation's management for future or past operations, products or services including the GEAR Up initiative, and forecasts of the Corporation's revenue, earnings or other measures of economic performance, including statements of profitability, business segments and subsidiaries as well as estimates of the economic benefits of the GEAR Up initiative, estimates of credit trends and global stability. Such statements reflect the view of the Corporation's management as of this date with respect to future events and are subject to risks and uncertainties. Should one or more of these risks materialize or should underlying beliefs or assumptions prove incorrect, the Corporation's actual results could differ materially from those discussed. Factors that could cause or contribute to such differences are changes in general economic, political or industry conditions; changes in monetary and fiscal policies; operational, systems or infrastructure failures; reliance on other companies to provide certain key components of business infrastructure; cybersecurity risks; 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; operational difficulties, failure of technology infrastructure or information security incidents; reliance on other companies to provide certain key components of business infrastructure; the Corporation's ability to maintain adequate sources of funding and liquidity; the effects of more stringent capital or liquidity requirements; declines or other changes in the businesses or industries of the Corporation's customers; unfavorable developments concerning credit quality; changes in regulation or oversight; changes in the financial markets, includingheightened legislative and regulatory focus on cybersecurity and data privacy; fluctuations in interest rates and their impact on deposit pricing; transitions away from LIBOR towards new interest rate benchmarks; reductions in the Corporation's credit rating; damage to the Corporation's reputation; the Corporation's ability to utilize technology to efficiently and effectively develop, market and deliver new products and services; competitive product and pricing pressures among financial institutions within the Corporation's markets; the interdependence of financial service companies; the implementation of the Corporation's strategies and business initiatives; changes in customer behavior; management's ability to maintain and expand customer relationships; the effectiveness of methods of reducing risk exposures; the effects of catastrophic events including, but not limited to, hurricanes, tornadoes, earthquakes, fires, droughts and floods; the effectsimpacts of recent tax reform and potentialfuture legislative, administrative or judicial changes or interpretations related to these and other tax regulations; any future strategic acquisitions or divestitures; management's ability to retain key officers and employees; the impact of legal and regulatory proceedings or determinations; losses due to fraud; the effects of terrorist activities and other hostilities; changes in accounting standards; the critical nature of the Corporation's accounting policiespolicies; controls and procedures failures; and the volatility of the Corporation’sCorporation's stock price. The Corporation cautions that the foregoing list of factors is not all-inclusive. For discussion of factors that may cause actual results to differ from expectations, please refer to our filings with the Securities and Exchange Commission. In particular, please refer to “Item 1A. Risk Factors” beginning on page 1112 of the Corporation's Annual Report on Form 10-K for the year ended December 31, 2017.2018. Forward-looking statements speak only as of the date they are made. 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. For any forward-looking statements made in this report or in any documents, the Corporation claims the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995.

RESULTS OF OPERATIONS
Net income for the three months ended June 30, 2018March 31, 2019 was $326$339 million, an increase of $123$58 million from $203compared to $281 million reported for the three months ended June 30, 2017.March 31, 2018. Net income per diluted common share for the same respective periods was $1.87$2.11 compared to $1.13. Management$1.59. Careful management of loan and deposit pricing in a rising rate environment, improvedsustained strong credit quality successful execution of GEAR Up initiatives and a decrease in the federal statutory tax rate in 2018 resulting from the Tax Cuts and Jobs Actexpense control contributed to the increase in net income. Net
The following table lists certain items impacting net income included tax benefits from employee stock transactions of $3 million (2 centsand earnings per share) and $5 million (3 cents per share) for the three months ended June 30, 2018 and 2017, respectively. After-tax restructuring charges were $9 million (5 cents per share) in both periods.
Net income for the six months ended June 30, 2018 was $607 million, an increase of $202 million from $405 million reported for the six months ended June 30, 2017. Net income per diluted common share for the same respectivethree-month periods was $3.46ended March 31, 2019 and 2018.
 Three Months Ended March 31,
 20192018
(in millions, except per share data)AmountPer ShareAmountPer Share
Securities repositioning loss, net of tax (a)$(6)$(0.04)$
$
Restructuring charges, net of tax

(12)(0.07)
Discrete tax items (b)11
0.07
22
0.12
(a)Losses incurred on the sale of approximately $1 billion of treasury securities that were replaced by securities yielding about $1 million of additional interest per quarter.
(b)Primarily tax benefits from employee stock transactions.
Full-Year 2019 Outlook
For full-year 2019 compared to $2.24. Net income for the six months ended June 30, 2018 included $22 million of tax benefits from employee stock transactions (13 cents per share), $21 million of restructuring charges, after-tax, (12 cents per share) and a $3 million deferred tax benefit resulting from the Tax Cut and Jobs Act (1 cent per share). Net income for the six months ended June 30, 2017 included tax benefits from employee stock transactions of $29 million (16 cents per share) and a $16 million after-tax impact from restructuring charges (9 cents per share).
Growth in Efficiency and Revenue Initiative
Since the GEAR Up initiative was launched in 2016, the Corporation has consolidated 38 banking centers, implemented a new retirement program resulting in a significant reduction in retirement plan expense and reduced the number of full-time equivalent employees by over 900, including a reduction of approximately 100 in the first six months of 2018, among other initiatives. The impact of increases in short-term rates and the execution of certain GEAR Up initiatives helped lower the efficiency ratio to 53.2 percent and 54.7 percent for the three- and six-month periods ended June 30, 2018, respectively, and increase return on equity to 16.4 percent and 15.4 percent for the same periods, respectively. The Corporation anticipates cumulative benefits to pre-tax income from GEAR Up initiatives of approximately $270 million and $305 million for full-year 2018 and 2019, respectively, relative to when the initiative was announced. For further details on anticipated additional benefits, refer to page F-5 of the Corporation's 2017 Annual Report.
Total pre-tax restructuring charges for 2018 are expected to range from $47 million to $52 million with no restructuring charges anticipated beyond 2018. Cumulative restructuring charges from inception of GEAR Up through 2018 are expected to range from $185 million to $190 million. For additional information regarding restructuring charges, refer to note 13 to the consolidated financial statements.
2018 Second-Half Outlook
For the second half of 2018, management expects the following, assuming a continuation of the current economic and rate environment as well asenvironment:
Growth in average loans of 2 percent to 4 percent, reflecting increases in most lines of business.
Decline in average deposits of 1 percent to 2 percent from a decrease in noninterest-bearing deposits.
Growth in net interest income of 3 percent to 4 percent from the benefitsfull-year net benefit of higher interest rates, growth in average loans and repositioning the securities portfolio, partially offset by higher wholesale funding, a shift in deposit mix and lower interest recoveries.
Provision for credit losses of 10 basis points to 15 basis points and net charge-offs to remain low, with continued strong credit quality.
Noninterest income higher by 1 percent to 2 percent (including $8 million securities repositioning loss in first quarter 2019), benefiting from growth in card fees and fiduciary income, partially offset by lower derivative income and service charges on deposit accounts.
Noninterest expenses lower by 3 percent, reflecting the end of restructuring charges from the GEAR Up initiative:
Moderate growthinitiatives ($53 million in average loansfull-year 2018), Federal Deposit Insurance Corporation ("FDIC") insurance expense lower by $16 million from the discontinuance of the surcharge, as well as lower compensation and pension expense, partially offset by higher outside processing expenses in line with growing revenue, technology expenditures and typical inflationary pressures.
Growth in most lines of business with a slower pace in general Middle Market, National Dealer Services and Mortgage Banker Finance due to seasonality.
Energy and Corporate Banking to remain stable.
Net interest income higher, reflecting recent rate increases, loan growth and three additional days.
Full-year 2018 net benefit of $70 million from the first quarter 2018 rate increase and $35 million to $40 million from the second quarter 2018 rate increase.
Elevated interest recoveries not expected to repeat ($11 million in second quarter 2018).
Provision for credit losses of $10 million to $20 million per quarter and net charge-offs to remain low.
Noninterest income growth trend to continue benefiting from the execution of GEAR Up initiatives to help drive growth in treasury management income, card fees and fiduciary income.
Noninterest expenses modestly higher (excluding restructuring charges) primarily due to additional days.
GEAR Up savings remain on track.
Continued higher technology expenditures.
Seasonal and typical inflationary pressures leading to higher occupancy and advertising expenses.
Restructuring charges of $20 million to $25 million.Lower compensation driven by incentive compensation, partially offset by merit increases.
Income tax expense to be approximately 23 percent of pre-tax income, excluding any tax impact from employee stock transactions.
Full-year 2018 included discrete tax benefits of $48 million.
.Common equity Tier 1 capital ratio target of 9.5 percent to 10 percent through continued return of excess capital.



Net Interest Income
Quarterly Analysis of Net Interest Income & Rate/Volume
Three Months EndedThree Months Ended
June 30, 2018 June 30, 2017March 31, 2019 March 31, 2018
(dollar amounts in millions)
Average
Balance
Interest
Average
Rate
 
Average
Balance
Interest
Average
Rate
Average
Balance
Interest
Average
Rate
 
Average
Balance
Interest
Average
Rate
Commercial loans$30,966
$357
4.64% $30,632
$283
3.71%$31,461
$394
5.07% $30,145
$315
4.24%
Real estate construction loans3,189
41
5.12
 2,910
29
4.08
3,238
46
5.74
 3,067
36
4.74
Commercial mortgage loans9,174
107
4.65
 9,012
87
3.88
8,997
114
5.14
 9,217
98
4.32
Lease financing457
4
3.65
 526
1
0.60
519
5
3.87
 464
5
4.22
International loans981
13
5.02
 1,139
12
3.99
1,014
13
5.37
 996
11
4.60
Residential mortgage loans1,993
20
3.88
 1,975
18
3.61
1,965
19
3.85
 2,011
18
3.67
Consumer loans2,465
26
4.35
 2,529
23
3.62
2,483
30
4.98
 2,521
26
4.13
Total loans(a)49,225
568
4.63
 48,723
453
3.73
49,677
621
5.07
 48,421
509
4.26
          
Mortgage-backed securities9,098
52
2.25
 9,336
50
2.17
9,225
56
2.41
 9,168
52
2.21
Other investment securities2,701
12
1.71
 2,896
12
1.67
2,730
16
2.32
 2,743
12
1.72
Total investment securities11,799
64
2.12
 12,232
62
2.05
11,955
72
2.39
 11,911
64
2.09
          
Interest-bearing deposits with banks3,957
18
1.82
 5,263
14
1.03
2,852
17
2.40
 4,548
17
1.55
Other short-term investments133

0.94
 92

0.58
134

1.33
 132

0.60
Total earning assets65,114
650
3.98
 66,310
529
3.21
64,618
710
4.44
 65,012
590
3.66
          
Cash and due from banks1,235
   1,148
  925
   1,261
  
Allowance for loan losses(708)   (726)  (672)   (718)  
Accrued income and other assets4,879
   4,614
  4,900
   4,771
  
Total assets$70,520
   $71,346
  $69,771
   $70,326
  
          
Money market and interest-bearing checking deposits$22,187
26
0.47
 $21,661
7
0.13
$22,612
47
0.83
 $21,891
14
0.26
Savings deposits2,231

0.04
 2,142

0.02
2,170

0.04
 2,177

0.03
Customer certificates of deposit2,063
2
0.38
 2,527
2
0.36
Certificates of deposit2,330
5
0.92
 2,122
2
0.34
Foreign office time deposits33

1.13
 57

0.60
12

1.55
 31

1.14
Total interest-bearing deposits26,514
28
0.42
 26,387
9
0.15
27,124
52
0.78
 26,221
16
0.25
          
Short-term borrowings56

1.74
 147

1.12
221
1
2.39
 35

1.47
Medium- and long-term debt5,584
32
2.24
 5,161
20
1.48
6,694
51
3.06
 5,192
25
1.96
Total interest-bearing sources32,154
60
0.74
 31,695
29
0.37
34,039
104
1.23
 31,448
41
0.53
          
Noninterest-bearing deposits29,316
   30,741
  26,872
   29,869
  
Accrued expenses and other liabilities1,073
   966
  1,401
   1,082
  
Total shareholders’ equity7,977
   7,944
  7,459
   7,927
  
Total liabilities and shareholders’ equity$70,520
   $71,346
  $69,771
   $70,326
  
          
Net interest income/rate spread $590
3.24
  $500
2.84
 $606
3.21
  $549
3.13
          
Impact of net noninterest-bearing sources of funds  0.38
  0.19
  0.58
  0.28
Net interest margin (as a percentage of average earning assets) 3.62%  3.03% 3.79%  3.41%
(a)Nonaccrual loans are included in average balances reported and in the calculation of average rates.



Quarterly Analysis of Net Interest Income & Rate/Volume (continued)Analysis
Three Months EndedThree Months Ended
June 30, 2018/June 30, 2017March 31, 2019/March 31, 2018
(in millions)
Increase
Due to Rate
Increase
(Decrease)
Due to 
Volume (a)
Net
Increase
Increase
Due to Rate
Increase
(Decrease)
Due to 
Volume (a)
Net
Increase
Interest Income:            
Loans$108
 $7
 $115
 $97
 $15
 $112
 
Investment securities2
 
 2
 8
 
 8
 
Interest-bearing deposits with banks10
 (6) 4
 10
 (10) 
 
Total interest income120
 1
 121
 115
 5
 120
 
Interest Expense:            
Interest-bearing deposits20
 (1) 19
 34
 2
 36
 
      
Short-term borrowings
 1
 1
 
Medium- and long-term debt11
 1
 12
 13
 13
 26
 
Total interest expense31
 
 31
 47
 16
 63
 
Net interest income$89
 $1
 $90
 $68
 $(11) $57
 
(a)Rate/volume variances are allocated to variances due to volume.
Net interest income was $590$606 million for the three months ended June 30, 2018,March 31, 2019, an increase of $90$57 million compared to $500$549 million for the three months ended June 30, 2017.March 31, 2018. The increase in net interest income primarily reflected thea net benefit from higher rates. The impact ofrates and a $502 million$1.3 billion increase in average loans, was largelypartially offset by the impact of a $1.3$1.5 billion increase in average debt primarily used for share repurchases as well as a $1.7 billion decrease in interest-bearing deposits with banks, primarily Federal Reserve Bank (FRB) deposits. The net interest margin for the three months ended June 30, 2018March 31, 2019 increased 5938 basis points to 3.623.79 percent, from 3.033.41 percent for the comparable period in 2017,2018, primarily reflecting the net benefit from higher rates, higher average loan balances and thea decrease in lower-yielding averageFRB deposit balances, deposited with the FRB.

Year-to-Date Analysis of Net Interest Income & Rate/Volume
 Six Months Ended
 June 30, 2018 June 30, 2017
(dollar amounts in millions)
Average
Balance
Interest
Average
Rate
 
Average
Balance
Interest
Average
Rate
Commercial loans$30,556
$672
4.44% $30,166
$539
3.61%
Real estate construction loans3,129
77
4.93
 2,934
57
3.95
Commercial mortgage loans9,195
205
4.49
 8,994
170
3.81
Lease financing461
9
3.93
 548
6
2.00
International loans989
24
4.81
 1,174
23
3.88
Residential mortgage loans2,002
38
3.78
 1,969
35
3.59
Consumer loans2,493
52
4.24
 2,528
44
3.52
Total loans48,825
1,077
4.45
 48,313
874
3.65
        
Mortgage-backed securities9,133
104
2.23
 9,321
99
2.16
Other investment securities2,722
24
1.71
 2,894
24
1.63
Total investment securities11,855
128
2.11
 12,215
123
2.03
        
Interest-bearing deposits with banks4,251
35
1.68
 5,857
28
0.92
Other short-term investments132

0.84
 92

0.63
Total earning assets65,063
1,240
3.83
 66,477
1,025
3.11
        
Cash and due from banks1,248
   1,164
  
Allowance for loan losses(713)   (733)  
Accrued income and other assets4,825
   4,673
  
Total assets$70,423
   $71,581
  
        
Money market and interest-bearing checking deposits$22,039
40
0.37
 $22,066
14
0.13
Savings deposits2,205

0.03
 2,114

0.02
Customer certificates of deposit2,092
4
0.36
 2,621
4
0.37
Foreign office time deposits32

1.13
 50

0.55
Total interest-bearing deposits26,368
44
0.34
 26,851
18
0.14
        
Short-term borrowings45

1.63
 85

1.07
Medium- and long-term debt5,390
57
2.11
 5,159
37
1.39
Total interest-bearing sources31,803
101
0.64
 32,095
55
0.35
        
Noninterest-bearing deposits29,591
   30,601
  
Accrued expenses and other liabilities1,077
   980
  
Total shareholders’ equity7,952
   7,905
  
Total liabilities and shareholders’ equity$70,423
   $71,581
  
        
Net interest income/rate spread $1,139
3.19
  $970
2.76
        
Impact of net noninterest-bearing sources of funds  0.33
   0.18
Net interest margin (as a percentage of average earning assets)  3.52%   2.94%


Year-to-Date Analysis of Net Interest Income & Rate/Volume (continued)
 Six Months Ended
 June 30, 2018/June 30, 2017 
(in millions)
Increase
Due to Rate
Increase
(Decrease)
Due to 
Volume (a)
Net
Increase
 
Interest Income:      
Loans$191
 $12
 $203  
Investment securities5
 
 5  
Interest-bearing deposits with banks21
 (14) 7  
         Total interest income217
 (2) 215  
Interest Expense:      
Interest-bearing deposits27
 (1) 26  
Medium- and long-term debt21
 (1) 20  
Total interest expense48
 (2) 46  
         Net interest income$169
 $
 $169  
(a)Rate/volume variances are allocated to variances due to volume.
Net interest income was $1.1 billion for the six months ended June 30, 2018, an increase of $169 million compared to $970 million for the six months ended June 30, 2017. The increase in net interest income primarily reflected the net benefit from higher rates. The impact of a $1.6 billion decrease in interest-bearing deposits with banks, primarily FRB deposits, was mostlypartially offset by a $512 million increase inhigher average loans. The net interest margin for the six months ended June 30, 2018 increased 58 basis points to 3.52 percent, from 2.94 percent for the comparable period in 2017, reflecting the net benefit from higher rates and the decrease in lower-yielding average balances deposited with the FRB.debt.
For further discussion of the effects of market rates on net interest income, refer to the "Market and Liquidity Risk" section of this financial review.
Provision for Credit Losses
The provision for credit losses was a benefit of $29 million and $17$13 million for the three- and six-month periodsthree months ended June 30, 2018, respectively,March 31, 2019, compared to a provision expense of $17 million and $33$12 million for the three- and six-month periodsthree months ended June 30, 2017, respectively.March 31, 2018. 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.portfolio and includes qualitative adjustments for factors that have not been fully accounted for in the quantitative reserve calculations.
The provision for loan losses decreased $38$27 million fromto a provision expensebenefit of $15$13 million for the three months ended June 30, 2017March 31, 2019, compared to a benefitprovision expense of $23$14 million for the three months ended June 30,March 31, 2018. The decrease in the provision primarily reflected improvedsustained strong credit quality in most lines of business withdriven by low levels of net charge-offs and inflows of nonaccrual loans as well as a decline in nonperforming loans. Net loan charge-offs decreased $17 million to $11 million for the largest decreasesthree months ended March 31, 2019, compared to $28 million for the three months ended March 31, 2018. The decrease in net charge-offs was primarily reflected in general Middle Market and Small Business. Gross charge-offsNonperforming loans as a percentage of total loans decreased $19 million29 basis points to $20 million, and recoveries increased $2 million to $23 million, resulting in net loan recoveries of $3 million0.39 percent for the three months ended June 30, 2018March 31, 2019, compared to net loan charge-offs of $18 million for the three months ended June 30, 2017. The decrease in net charge-offs was driven by decreases in general Middle Market and Small Business. The provision for loan losses decreased $35 million from a provision expense of $26 million for the six months ended June 30, 2017 to a benefit of $9 million for the six months ended June 30, 2018. The decreasesame period in the provision primarily reflected improved credit quality in Technology and Life Sciences as well as Small Business. Gross charge-offs decreased $26 million to $57 million, and recoveries were unchanged at $32 million, resulting in net loan charge-offs of $25 million for the six months ended June 30, 2018, compared to net loan charge-offs of $51 million for the six months ended June 30, 2017. The decrease in net charge-offs was driven by decreases in Technology and Life Sciences, Energy, Small Business and Corporate Banking, partially offset by an increase in general Middle Market.prior year.
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. TheNo provision for credit losses on lending-related commitments decreased $8 million from a provision expense of $2 millionwas necessary for the three months ended June 30, 2017 to a benefit of $6 million for the three months ended June 30, 2018. The provision for credit losses on lending-related commitments decreased $15 million from a provision expense of $7 million for the six months ended June 30, 2017 to a benefit of $8 million for the six months ended June 30, 2018. The decrease in the provision reflected decreases in commercial commitments, primarily in Energy. ThereMarch 31, 2019. Additionally, there were no lending-related commitment charge-offs for both the three- and six-monththree-month periods ended June 30, 2018March 31, 2019 and 2017.2018.
An analysis of the allowance for credit losses and nonperforming assets is presented under the "Credit Risk" subheading in the "Risk Management" section of this financial review.

Presentation Changes
Noninterest income and noninterest expenses for the three- and six-month periods ended June 30, 2018 reflect certain presentation changes resulting from the adoption of Accounting Standards Codification Topic 606, "Revenue from Contracts with Customers," (Topic 606), effective January 1, 2018. These changes primarily impacted card fees and service charges on deposit accounts in noninterest income, fully offset by the impact to outside processing fee expense in noninterest expenses. See note 1 to the consolidated financial statements for further details on the adoption of Topic 606. The table below summarizes the proforma effects to the three- and six-month periods ended June 30, 2017.
 Reported AmountsProforma EffectsProforma Amounts (a)
(in millions)
Three Months Ended June 30, 2017   
Card fees$80
$(26)$54
Service charges on deposit accounts57
(2)55
Total noninterest income276
(28)248
    
Outside processing fee expense88
(28)60
Total noninterest expenses457
(28)429
    
Six Months Ended June 30, 2017   
Card fees$157
$(51)$106
Service charges on deposit accounts115
(3)112
Total noninterest income547
(54)493
    
Outside processing fee expense175
(54)121
Total noninterest expenses914
(54)860
(a) The Corporation believes proforma noninterest income and noninterest expenses (each a non-GAAP measure) provides a greater understanding of ongoing operations and enhances comparability of results with prior periods.
Noninterest Income
Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Card fees$60
 $80
 $119
 $157
$63
 $59
Service charges on deposit accounts53
 57
 107
 115
51
 54
Fiduciary income52
 51
 104
 100
49
 52
Commercial lending fees23
 22
 41
 42
22
 18
Foreign exchange income11
 12
Letter of credit fees11
 11
 21
 23
9
 10
Bank-owned life insurance9
 9
 18
 19
9
 9
Foreign exchange income12
 11
 24
 22
Brokerage fees6
 6
 13
 11
7
 7
Net securities gains
 
 1
 
Net securities (losses) gains(8) 1
Other noninterest income(a)22
 29
 44
 58
25
 22
Total noninterest income$248
 $276
 $492
 $547
$238
 $244
(a)The table below provides further details on certain categories included in other noninterest income.
Noninterest income decreased $28$6 million to $248$238 million for the three months ended June 30, 2018,March 31, 2019, compared to $276$244 million for the same period in 2017.2018. Excluding an $8 million pre-tax loss on the $28 million proforma effectsale of Topic 606 to the three months ended June 30, 2017,securities from repositioning approximately $1 billion of treasury securities, noninterest income was unchanged at $248 million. Increasesincreased $2 million, reflecting increases in syndication agent fees (component of $6 million incommercial lending fees) and card fees, (proforma) and $1 million in fiduciary income werepartially offset by decreases of $3 million in warrant income and $2 million each in service charges on deposit accounts (proforma) and customer derivative income. Noninterest income decreased $55 million to $492 million for the six months ended June 30, 2018, compared to $547 million for the same period in the prior year. Excluding the $54 million proforma effect of Topic 606 to the six months ended June 30, 2017, noninterest income decreased $1 million, primarily reflecting decreases of $4 million each in service charges on deposit accounts (proforma) and customer derivative income, $3 million each in warrant income and deferred compensation asset returns as well as smaller decreases in various other categories, mostly offset by increases of $13 million in card fees (proforma) and $4 million in fiduciary income.

The following table illustrates certain categories included in other noninterest income on the Consolidated Statements of Comprehensive Income.
Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Customer derivative income$6
 $8
 $10
 $14
$7
 $4
Investment banking fees1
 1
 4
 5
2
 3
Deferred compensation asset returns (a)1
 2
 2
 5
2
 1
Securities trading income2
 3
Income from principal investing and warrants1
 4
 1
 4
1
 
All other noninterest income13
 14
 27
 30
11
 11
Other noninterest income$22
 $29
 $44
 $58
$25
 $22
(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 other noninterest income and the resultingoffsetting change in deferred compensation plan liabilities is reported in salaries and benefits expense. Changes in income earned on deferred compensation assets are substantially offset by changes in deferred compensation plan expense.
Noninterest Expenses
Three Months Ended June 30, Six Months Ended June 30,Three Months Ended March 31,
(in millions)2018 2017 2018 20172019 2018
Salaries and benefits expense$250
 $231
 $505
 $476
$265
 $255
Outside processing fee expense64
 88
 125
 175
63
 61
Net occupancy expense37
 38
 75
 76
37
 38
Software expense29
 31
Equipment expense11
 11
 22
 22
12
 11
Restructuring charges11
 14
 27
 25
Software expense32
 31
 63
 60
FDIC insurance expense12
 12
 25
 25
5
 13
Advertising expense8
 7
 14
 11
5
 6
Litigation-related expense
 
 
 (2)
Restructuring charges
 16
Other noninterest expenses23
 25
 38
 46
17
 15
Total noninterest expenses$448
 $457
 $894
 $914
$433
 $446

Noninterest expenses decreased $9$13 million to $448$433 million for the three months ended June 30, 2018,March 31, 2019, compared to $457$446 million for the same period in 2017.2018. Excluding the $28$16 million proforma effect of Topic 606 to the three months ended June 30, 2017,restructuring charges completed in 2018, noninterest expenses increased $19$3 million, primarily reflecting increases of $19 millionan increase in salaries and benefits expense, and $4 million in outside processing fee expense (proforma), partially offset by a $3 million decrease in restructuring charges. The increase in salaries and benefitsFDIC insurance expenseprimarily reflected higher share-based and incentive compensation tied to financial performance as well as merit increases.
Noninterest expenses decreased $20 million to $894 million for the six months ended June 30, 2018, compared to $914 million for the same period in 2017. Excluding the $54 million proforma effect of Topic 606 due to the six months ended June 30, 2017, noninterest expenses increased $34 million, reflecting increasesend of $29 million in salaries and benefits expense, $4 million in outside processing fee expense (proforma), $3 million each in software and advertising expense and smaller increases in various other categories, partially offset by a $5 million business tax refund included in other noninterest expenses in the six months ended June 30, 2018.FDIC surcharges. The increase in salaries and benefits expense was primarily due to an increase in technology-related labor costs and the same reasons as discussed above.impact of merit increases.
For further information about restructuring charges associated with the GEAR Up initiative, see note 13 to the consolidated financial statements.
Provision for Income Taxes
The provision for income taxes decreased $6increased $31 million to $93$85 million for the three months ended June 30, 2018,March 31, 2019, compared to $99$54 million for the same period in 2017, and decreased $18 million to $147 million for the six months ended June 30, 2018, compared to $165 million for the same period in 2017. The decreases were primarily due to the decreasean increase in the statutory tax rate in 2018 resulting from the Tax Cuts and Jobs Act,partially offset by higher pre-tax income and loweran $11 million decrease in discrete tax benefits, primarily from a lower volume of employee stock transactions. Income tax benefits from employee stock transactions were $3 million and $22 million for the three- and six-month periods ended June 30, 2018, respectively, compared to $5 million and $29 million for the same periods in 2017.
STRATEGIC LINES OF BUSINESS
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 divisionDivision 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 1413 to the consolidated financial statements describes the business activities of each business segment and presents financial results of these business and market segments for the three- and six-monththree-month periods ended June 30, 2018March 31, 2019 and 2017.2018.
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. Note 23 to the consolidated financial statements in the Corporation's 20172018 Annual Report describes the Corporation's segment reporting methodology.
Net interest income for each segment reflects the interest income generated by earning assets less interest expense on interest-bearing liabilities plus the net impact from associated internal funds transfer pricing (FTP). The FTP methodology allocates credits to each business segment credits for deposits and other funds provided andas well as charges each business segment for loans and other assets being funded. FTP crediting rates for deposits and other funds provided reflect the long-term value of deposits and other funding sources based on their implied maturities. FTP charge rates for funding loans and other assets reflect a matched cost of funds based on the pricing and duration characteristics of the assets. Therefore, net interest income for each segment primarily reflects the volume and associated FTP impacts of loan and deposit levels. Business segments that generate deposits benefited from higher FTP crediting rates on deposits were higher in the sixthree months ended June 30, 2018 than inMarch 31, 2019 compared to the same period in the prior year, and as a result, net interest income for deposit-providing business segments has been positively impacted during the current year. As overall market rates increased, FTP charges for funding loans increased for asset-generating business segments in the sixthree months ended June 30, 2018,March 31, 2019, compared to the same period in the prior year. Additionally, the net FTP impact to a specific business or market segment is a function of the changes in that segment's balance sheet composition, primarily loan and deposit volumes.
The following sections present a summary of the performance of each of the Corporation's business and market segments for the sixthree months ended June 30, 2018March 31, 2019 compared to the same period in the prior year. The proforma effect of Topic 606 to the six months ended June 30, 2017, reducing both noninterest income and noninterest expenses by $54 million, primarily impacted the Business Bank and Other Markets segments.
Business Segments
The following table presents net income (loss) by business segment.
Six Months Ended June 30,Three Months Ended March 31,
(dollar amounts in millions)2018 20172019 2018
Business Bank$432
 80% $357
 83%$274
 82% $218
 84%
Retail Bank52
 10
 27
 6
28
 8
 11
 4
Wealth Management55
 10
 46
 11
33
 10
 32
 12
539
 100% 430
 100%335
 100% 261
 100%
Finance45
   (56)  (7)   1
  
Other (a)23
   31
  11
   19
  
Total$607
   $405
  $339
   $281
  
(a)Included discrete tax benefits from employee stock transactions of $22$11 million and $29$22 million for the sixthree months ended June 30,March 31, 2019 and 2018, and 2017, respectively, and items not directly associated with the three major business segments or the Finance Division.respectively.
The Business Bank's net income increased $75$56 million to $432$274 million. Average loans increased $684 million$1.4 billion and average deposits decreased $2.3$2.0 billion. Net interest income increased $3$31 million to $671$412 million. An increase in loan income of $173 million was mostly offset by a $12 million increase in deposit costs and a $159 million increase in allocated net FTP charges. The FTP allocation reflected an increase in funding charges as well as increases in crediting rates on deposits as a result of higher short-term rates.  The decline in deposit balances resulted in a decrease in FTP deposit credits. The provision for credit losses decreased $29 million to a benefit of $7 million, primarily reflecting decreases in Technology and Life Sciences and Corporate Banking, partially offset by an increase in Commercial Real Estate. Net credit-related charge-offs decreased $22 million to $18 million, primarily reflected decreases in Technology and Life Sciences and Energy. Excluding the $48 million proforma effect to the prior year of Topic 606, noninterest income decreased $1 million, and noninterest expenses increased $21 million. Noninterest income was primarily impacted by decreases of $7 million in customer derivative income, $3 million in letter of credit fees and smaller decreases in several other categories of noninterest income, partially offset by a $12 million increase in card fees (proforma). The increase in noninterest expenses primarily reflected increases of $6 million in outside processing fee expense (proforma), $5 million in corporate overhead and $3 million in salaries and benefits expense and smaller increases in other categories of noninterest income.

The Retail Bank's net income increased $25 million to $52 million. Average deposits increased $246 million. Net interest income increased $12 million to $334 million. An increase in loan income of $19$105 million was partially offset by a $5increases of $17 million increase in deposit costs and a $2$57 million increase in allocated net FTP charges. The FTP allocation reflected an increase in funding charges as well as increases in crediting rates on deposits as a result of higher short-term rates. Higher deposit balances resulted in an increase in FTP deposit credits. The provision for credit losses decreased $22 million to a benefit of $5$6 million, primarily reflecting a decrease in Small Business.general Middle Market, partially offset by an increase in Energy, primarily due to loan growth. Net credit-related charge-offs decreased $6$18 million to $8 million, due to a decrease in Small Business. Excluding the $6 million proforma effect to the prior year of Topic 606, noninterest income decreased $6 million and noninterest expenses increased $2 million. Noninterest income was primarily impacted by decreases of $3 million in service charges on deposit accounts (proforma), $3 million in revenue related to a retirement savings program being wound down and smaller decreases in other categories of noninterest income, partially offset by a $3 million increase in card fees (proforma). Noninterest expenses was primarily impacted by increases of $6 million in salaries and benefits expense and $4 million in corporate overhead, partially offset by a decrease of $4 million in outside processing fee expense (proforma), $3 million of which was due to the wind-down of a retirement savings program, and smaller decreases in other categories of noninterest expenses.
Wealth Management's net income increased $9 million to $55 million. Net interest income decreased $2 million to $81 million. The provision for credit losses was unchanged at a benefit of $3 million. Net credit-related recoveries decreased $2 million to $1 million. Noninterest income increased $7 million to $135$12 million, primarily reflecting a $5 milliondecrease in general Middle Market, partially offset by an increase in fiduciary income.Energy. Noninterest expensesincome increased $6 million to $147$5 million, primarily reflecting increases of $4 million each in salariescard fees and benefits expensesyndication agent fees and $2 million in customer derivative income, partially offset by decreases of $2 million each in service charges on deposit accounts and investment banking

fees. Excluding restructuring charges of $10 million in first quarter 2018, noninterest expenses decreased $5 million, primarily reflecting decreases of $4 million in corporate overhead and $3 million in corporate overhead,FDIC insurance expense.
The Retail Bank's net income increased $17 million to $28 million. Average deposits decreased $423 million. Net interest income increased $19 million to $146 million. Increases of $26 million in allocated net FTP credits and $4 million in loan income were partially offset by smaller decreasesa $10 million increase in other categoriesdeposit costs. The provision for credit losses decreased $2 million to a benefit of $4 million. Noninterest income and noninterest expenses.expenses, excluding restructuring charges of $4 million in first quarter 2018, were stable.
Wealth Management's net income increased $1 million to $33 million. Net interest income increased $4 million to $47 million. The provision for credit losses decreased $1 million to a benefit of $5 million. Net credit-related recoveries decreased $1 million. Noninterest income decreased $3 million to $64 million, primarily reflecting a $3 million decrease in fiduciary income. Noninterest expenses were stable.
Net income infor the Finance segment was $45decreased $8 million compared to a net loss of $56 million. Net interest income increased $147$7 million, including the impact of the $6 million loss, net of tax, due to $27 million, primarily reflecting a increase in net FTP revenue as a result of higher rates charged torepositioning the business segments under the Corporation's internal FTP methodology.securities portfolio.
Market Segments
The following table presents net income (loss) by market segment.
Six Months Ended June 30,Three Months Ended March 31,
(dollar amounts in millions)2018 20172019 2018
Michigan$122
 23% $135
 31%$87
 26% $53
 19%
California182
 33
 120
 28
110
 33
 91
 35
Texas101
 19
 80
 19
62
 18
 49
 19
Other Markets134
 25
 95
 22
76
 23
 68
 27
539
 100% 430
 100%335
 100% 261
 100%
Finance & Other (a)68
   (25)  4
   20
  
Total$607
   $405
  $339
   $281
  
(a)
Included discrete tax benefits from employee stock transactions of $22$11 million and $29$22 million for the sixthree months ended June 30,March 31, 2019 and 2018, and 2017, respectively and items not directly associated with the three major business segments or the Finance Division..
The Michigan market's net income decreased $13increased $34 million to $122$87 million. Average deposits decreased $859 million.$1.3 billion. Net interest income decreased $1increased $12 million to $336$187 million. An increaseIncreases of $22 million in loan income of $52and $2 million wasin allocated net FTP credits were partially offset by a $7$12 million increase in deposit costs and a $45 million increase in allocated net FTP charges. The FTP allocation reflected an increase in funding charges as well as increases in crediting rates on deposits as a result of higher short-term rates. The decline in deposit balances resulted in a decrease in FTP deposit credits. The provision for credit losses increased $38 million to $34 million from a benefit of $4 million, primarily reflecting an increase in general Middle Market. Net credit-related recoveries decreased $3 million to net recoveries of $1 million. Excluding the $6 million proforma effect to the prior year of Topic 606, noninterest income decreased $12 million and noninterest expense decreased $1 million. The decrease in noninterest income primarily reflected decreases of $5 million in fiduciary income and $4 million in service charges on deposit accounts (proforma) and smaller decreases in other categories of noninterest income. Noninterest expenses were primarily impacted by small decreases in several categories of noninterest expenses, offset by increases of $4 million each in corporate overhead and salaries and benefit expenses.
The California market's net income increased $62 million to $182 million. Average loans increased $453 million and average deposits decreased $429 million. Net interest income increased $14 million to $363 million. An increase in loan income of $81 million was partially offset by a $7 million increase in deposit costs and a $61 million increase in allocated net FTP charges. The FTP allocation reflected an increase in funding charges as well as increases in crediting rates on deposits as a result of higher short-term rates. The decline in deposit balances resulted in a decrease in FTP deposit credits.costs. The provision for credit losses decreased $56$29 million to a benefit of $11 million from a $45 million provision, primarily due to decreases in Technology and Life Sciences, general Middle Market and Corporate Banking. Net credit-related charge-offs decreased $5 million to $13 million, primarily reflecting decreases in Technology and Life Sciences and Corporate Banking, partially offset by an increase in general Middle Market. Excluding the $3 million proforma effect to the prior year of Topic 606, noninterest income decreased $2 millionMarket, National Dealer Services and noninterest expense increased $20 million. Noninterest incom

e was primarily impacted by decreases of $2 million in customer derivative income. The increase in noninterest expenses primarily reflected increases of $5 million in corporate overhead expense, $3 million in salaries and benefits expense and increases in several other categories of noninterest expenses.
The Texas market's net income increased $21 million to $101 million. Average loans decreased $216 million and average deposits decreased $794 million. Net interest income was unchanged at $226 million. An increase in loan income of $39 million was mostly offset by a $38 million increase in allocated net FTP charges. The FTP allocation reflected an increase in funding charges as well as increases in crediting rates on deposits as a result of higher short-term rates. The decline in deposit balances resulted in a decrease in FTP deposit credits. The provision for credit losses decreased $4 million to a benefit of $28 million, reflecting a decrease in Small Business, and smaller decreases in most other areas, partially offset by an increase in Corporate Banking. Net credit-related charge-offs decreased $19increased $5 million to $8$4 million, from net recoveries of $1 million, primarily reflecting decreasesan increase in general Middle Market and Energy. Excluding the $3 million proforma effect to the prior year of Topic 606, noninterestCorporate Banking. Noninterest income and noninterest expenses, both decreased $1 million.excluding restructuring charges of $4 million in first quarter 2018, were stable.
Other Markets'The California market's net income increased $39$19 million to $134$110 million. Average loans increased $302$421 million and average deposits decreased $140$846 million. Net interest income was unchanged at $161increased $17 million to $205 million. An increase in loan income of $33$42 million was partially offset by a $4increases of $10 million increase in deposit costs and a $29$15 million increase in allocated net FTP charges. The FTP allocation reflected an increase in funding charges as well as increases in crediting rates on deposits asprovision for credit losses increased $1 million to a resultbenefit of higher short-term rates. The decline in deposit balances resulted in$1 million. Net credit-related charge-offs decreased $16 million to a benefit of $3 million, primarily reflecting a decrease in general Middle Market. Noninterest income and noninterest expenses, excluding restructuring charges of $5 million in first quarter 2018, were stable.
The Texas market's net income increased $13 million to $62 million. Average loans increased $440 million and average deposits decreased $490 million. Net interest income increased $11 million to $122 million. An increase in loan income of $27 million was partially offset by increases of $13 million in allocated net FTP charges and $3 million in deposit credits.costs. The provision for credit losses decreased $29increased $3 million to a benefit of $10$11 million, from a $19reflecting increases in Energy, primarily due to loan growth, and Small Business, mostly offset by decreases in general Middle Market as well as Technology and Life Sciences. Net credit-related charge-offs increased $8 million provision expense,to $13 million, primarily reflecting an increase in Energy. Noninterest income was stable. Excluding $5 million in restructuring charges in first quarter 2018, noninterest expenses decreased $3 million, primarily reflecting small decreases in Small Businessmost categories of noninterest expenses.
Other Markets' net income increased $8 million to $76 million. Average loans increased $442 million. Net interest income increased $13 million to $91 million. An increase in loan income of $23 million was partially offset by increases of $6 million in allocated net FTP charges and Corporate Banking.$4 million in deposit costs. The provision for credit losses was stable. Net credit-related charge-offs decreased $5$14 million to $5net recoveries of $3 million, primarily reflecting a decrease in Small Business. Excluding the $41 million proforma effect to the prior year of Topic 606, noninterestBusiness net charge-offs. Noninterest income increased $14 million and noninterest expenses increased $10 million. Noninterest income was primarily impacted by increases of $9 million each in card fees (proforma) and fiduciary income, partially offset by a $3 million decrease in customer derivative income. The increase in noninterest expenses primarily reflected increases of $6 million in salaries and benefits expense and smaller increases in several other categories of noninterest expenses.were stable.
Net income infor the Finance & Other category of $68decreased $16 million increased $93 million compared to a net loss of $25$4 million, primarily reflecting an increase in FTP revenue as a result of higher rates charged to the market segments under the Corporation's internal FTP methodology, partially offset by a $7$11 million decrease in discrete tax benefits from employee stock transactions.and the $6 million loss, net of tax, due to repositioning the securities portfolio.

The following table lists the Corporation's banking centers by geographic market segment.
June 30,March 31,
2018 20172019 2018
Michigan194
 195
193
 194
Texas122
 122
122
 122
California97
 97
96
 97
Other Markets:   
Arizona17
 17
Florida7
 7
Canada1
 1
Other Markets25
 25
Total438
 439
436
 438
FINANCIAL CONDITION
Total assets increased $420decreased $128 million to $72.0$70.7 billion at June 30, 2018March 31, 2019, compared to $71.6$70.8 billion at December 31, 2017, driven2018. A $753 million decrease in interest-bearing deposits with banks was mostly offset by a $619$621 million increase in total loans, partially offset by a $289 million decrease in investment securities.accrued income and other assets. On an average basis, total assets decreased $878 million$1.0 billion to $70.5$69.8 billion in the secondfirst quarter 2018,2019, compared to $71.4$70.8 billion in the fourth quarter 2017, resulting primarily from decreases of $1.02018, driven by a $2.1 billion decrease in average interest-bearing deposits with banks, and $356 million in average investment securities, partially offset by a $292an $845 million increase in average total loans.
The following tables provide information about the change in the Corporation's average loan portfolio in the secondfirst quarter 20182019, compared to the fourth quarter 2017,2018, by loan type and geographic market.

Three Months Ended   
Percent
Change
Three Months Ended   
Percent
Change
(dollar amounts in millions)June 30, 2018 December 31, 2017 Change March 31, 2019 December 31, 2018 Change 
Average Loans:              
Commercial loans$30,966
 $30,719
 $247
 1 %$31,461
 $30,651
 $810
 3 %
Real estate construction loans3,189
 3,031
 158
 5
3,238
 3,164
 74
 2
Commercial mortgage loans9,174
 9,054
 120
 1
8,997
 9,051
 (54) (1)
Lease financing457
 470
 (13) (3)519
 495
 24
 5
International loans981
 1,122
 (141) (13)1,014
 1,035
 (21) (2)
Residential mortgage loans1,993
 2,014
 (21) (1)1,965
 1,968
 (3) 
Consumer loans2,465
 2,523
 (58) (2)2,483
 2,468
 15
 1
Total loans$49,225
 $48,933
 $292
 1 %$49,677
 $48,832
 $845
 2 %
Average Loans By Geographic Market:              
Michigan$12,641
 $12,798
 $(157) (1)%$12,557
 $12,457
 $100
 1 %
California18,435
 18,236
 199
 1
18,768
 18,279
 489
 3
Texas9,862
 9,795
 67
 1
10,270
 9,889
 381
 4
Other Markets8,287
 8,104
 183
 2
8,082
 8,207
 (125) (2)
Total loans$49,225
 $48,933
 $292
 1 %$49,677
 $48,832
 $845
 2 %
The increase in average commercial loans was largely attributed to increases in Technology and Life SciencesNational Dealer Services, Energy and general Middle Market, partially offset by a seasonal decrease in Corporate Banking.Mortgage Banker Finance.
Total liabilities increased $304 million to $63.9remained stable at $63.3 billion at June 30, 2018 compared to $63.6 billion atboth March 31, 2019 and December 31, 2017, primarily reflecting2018 as a $961 million increase in medium- and long-term debt, partially offset by a $693 million decrease in total deposits. The increase in medium- and long-term debt primarily reflected a $1.0 billion increase in FHLB advances. The decrease in total deposits primarily reflected a $1.8$2.4 billion decrease in noninterest-bearing deposits partiallywas mostly offset by a $1.1 billion increaseincreases of $978 million in interest-bearing deposits. On an average basis, total liabilities decreased $868deposits, $891 million in the second quarter 2018, compared to the fourth quarter 2017, primarily due to a $1.8 billion decrease in total deposits, partially offset by a $953short-term borrowings and $385 million increase in medium- and long-term debt. The decrease in noninterest-bearing deposits included a $1.2 billion decrease due to the timing of deposits by the U.S. Treasury funding a government card program which typically fund on the first day of each month. The January payment was received in the fourth quarter of 2018 due to the New Year's holiday. The increase in short-term borrowings reflected temporary increases in federal funds purchased and short-term Federal Home Loan Bank (FHLB) advances. The increase in medium- and long-term debt reflected the issuance of $350 million in long-term notes during the first quarter 2019. On an average basis, total liabilities decreased $1.0 billion in the first quarter 2019, compared to the fourth quarter 2018, due to a $1.7 billion seasonal decrease in total deposits, primarily reflected decreasesmostly offset by increases of $311 million in general Middle Market (driven by seasonalityaccrued expenses and other liabilities as well as $274 million in Municipalities), Commercial Real Estatemedium- and Corporate Banking.long-term debt.

Capital
Total shareholders' equity increased $116decreased $98 million to $8.1$7.4 billion at June 30, 2018March 31, 2019, compared to $8.0$7.5 billion at December 31, 20172018. The following table presents a summary of changes in total shareholders' equity infor the sixthree months ended June 30, 2018March 31, 2019.
(in millions)
  
  
  
  
Balance at January 1, 2018  $7,963
Cumulative effect of change in accounting principles  15
Balance at January 1, 2019  $7,507
Cumulative effect of change in accounting principle  (14)
Net income  607
  339
Cash dividends declared on common stock  (110)  (105)
Purchase of common stock  (328)  (434)
Other comprehensive loss:   
Other comprehensive income:   
Investment securities$(151)  $90
  
Cash flow hedges3
  
Defined benefit and other postretirement plans12
  3
 
Total other comprehensive loss  (139)
Total other comprehensive income  96
Issuance of common stock under employee stock plans  37
  (4)
Share-based compensation  34
  24
Balance at June 30, 2018  $8,079
Balance at March 31, 2019  $7,409
On June 21, 2018,The Corporation expects to continue to return capital to shareholders with a target of reaching a common equity Tier 1 capital ratio of 9.5 percent to 10 percent by the Federal Reserve announced that bank holding companies with less than $100 billion in total assets are no longer subject to supervisory stress testing, including both the Dodd-Frank Act stress tests and Comprehensive Capital Analysis and Review. As such, at its meeting on July 24, 2018, the Boardend of Directors of the Corporation (the Board) approved capital actions aimed at increasing shareholder returns while continuing to appropriately manage its capital base as well as support growth and investment in its business. The Board approved a 26-cent increase in the quarterly dividend to $0.60 per share, effective for the dividend payable October 1, 2018, as well as the repurchase of $500 million of outstanding common stock during third quarter 2018.2019. The timing and ultimate amount of future distributions will be subject to various factors including financial performance, capital position and market conditions.

Also on July 24, 2018, the Board announced the authorization to repurchase of up to an additional 10 million shares of Comerica Incorporated outstanding common stock, in addition to the 6.2 million shares and 800 thousand warrants remaining at June 30, 2018 under the Board's prior authorizations for the equity repurchase program initially approved in November 2010. Including the July 24, 2018 authorization, a total of 65.2 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 the second quarter 2018, the Corporation's repurchases under the equity repurchase program totaled $169 million.
The following table summarizes the Corporation's repurchase activity during the sixthree months ended June 30, 2018.March 31, 2019.
(shares in thousands)
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 and Warrants
Purchased (c)
 
Average Price
Paid Per 
Share
Total first quarter 20181,565
 8,714
 1,674
 $95.16
April 2018803
 7,911
 805
 96.06
May 2018899
 7,011
 899
 96.59
June 201853
 6,952
 55
 95.87
Total second quarter 20181,755
 6,952
 1,759
 96.32
Total 2018 year-to-date3,320
 6,952
 3,433
 $95.75
(shares in thousands)Total Number of Shares Purchased as 
Part of Publicly Announced Repurchase Plans or Programs
 Remaining Share
Repurchase
Authorization (a)
 Total Number
of Shares
Purchased (b)
 Average Price
Paid Per 
Share
January 2019566
 19,141
(c)682
 $81.32
February 20192,561
 16,580
 2,564
 84.48
March 20191,967
 14,613
 1,970
 82.92
Total first quarter 20195,094
 14,613
 5,216
 $83.48
(a)The Corporation made no repurchases of warrants under the repurchase program during the six months ended June 30, 2018. 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 six months ended June 30, 2018, Comerica withheld the equivalent of approximately 34,000 shares to cover an aggregate $1 million in exercise price and issued approximately 81,000 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)(b)Includes approximately 113,000122,000 shares 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 during the sixthree months ended June 30, 2018.March 31, 2019. These transactions are not considered part of the Corporation's repurchase program.
(c)Includes January 2019 share repurchase authorization for an additional 15 million shares.
On July 6, 2018,A total of 80.2 million shares have been authorized for repurchase under the Board of Governors ofCorporation's share repurchase program since its inception in 2010. There is no expiration date for the Federal Reserve System issued a statement announcing that, consistent with the recently enacted Economic Growth, Regulatory Relief and Consumer Protection Act (EGRRCPA), bank holding companies with less than $100 billion in total assets are no longer subject to certain regulations and reporting requirements, such as Dodd-Frank Act stress testing, CCAR and the Liquidity Coverage Ratio, effective immediately. The Corporation is in the process of evaluating the full benefits of these changes.
In November 2017, U.S. banking regulators issued a final rule that suspended the full transition for certain deductions and adjustments to regulatory capital calculations effective January 1, 2018 to remain at current levels and issued a notice of proposed rulemaking (NPR) intended to simplify certain aspects of the Basel III regulatory capital framework. The Corporation does not expect the proposed rule to have a significant impact on its capital ratios.share repurchase program.
The following table presents the minimum ratios required to be considered "adequately capitalized".capitalized."
Common equity tier 1 capital to risk-weighted assets4.5004.50%
Tier 1 capital to risk-weighted assets6.0006.00
Total capital to risk-weighted assets8.0008.00
Capital conservation buffer (a)1.8752.50
Tier 1 capital to adjusted average assets (leverage ratio)4.0004.00
(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 and ultimately increases to 2.5% on January 1, 2019. The capital conservation buffer indicated above is as of June 30, 2018.

The Corporation's capital ratios exceeded minimum regulatory requirements as follows:
June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
(dollar amounts in millions)Capital/Assets Ratio Capital/Assets RatioCapital/Assets Ratio Capital/Assets Ratio
Common equity tier 1 and tier 1 risk based (a)$8,026
 11.90% $7,773
 11.68%$7,277
 10.78% $7,470
 11.14%
Total risk-based (a)9,422
 13.96
 9,211
 13.84
8,639
 12.80
 8,855
 13.21
Leverage (a)8,026
 11.35
 7,773
 10.89
7,277
 10.40
 7,470
 10.51
Common equity8,079
 11.22
 7,963
 11.13
7,409
 10.48
 7,507
 10.60
Tangible common equity (b)7,437
 10.42
 7,320
 10.32
6,769
 9.66
 6,866
 9.78
Risk-weighted assets (a)67,468
   66,575
  67,507
   67,047
  
(a)June 30, 2018March 31, 2019 capital, risk-weighted assets and ratios are estimated and do not reflect guidance related to high volatility commercial real estate loans as indicated in the recent interagency statement regarding the impact of the EGRRCPA.estimated.
(b)See Supplemental Financial Data section for reconcilements of non-GAAP financial measures.
RISK MANAGEMENT
The following updated information should be read in conjunction with the "Risk Management" section on pages F-20F-21 through F-33F-34 in the Corporation's 20172018 Annual Report.
Credit Risk
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 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.
The allowance for loan losses was $677$647 million at June 30, 2018,March 31, 2019, compared to $712$671 million at December 31, 2017,2018, a $35decrease of $24 million, or 5 percent, decrease.4 percent. As a percentage of total loans, the allowance for loan losses was 1.361.29 percent at June 30, 2018,March 31, 2019, compared to 1.451.34 percent at December 31, 2017.2018. The decrease in the allowance for loan losses reflected continued improvement insustained strong credit quality of the portfolio includingand continued solid economic conditions across our geography and within industry exposures. The strong credit quality performance resulted in nonperforming loans as a $466 million decline in criticizedpercentage of total loans of 0.39 percent at March 31, 2019, compared to 0.46 percent at December 31, 2018, and low net loan charge-offs.an allowance coverage of 3.3 at March 31, 2019, compared to 2.9 at December 31, 2018.
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 $34 million and $42$30 million at June 30, 2018both March 31, 2019 and December 31, 2017, respectively. The decrease in the allowance reflected decreases in commercial commitments, primarily related to Energy.2018.
For additional information regarding the allowance for credit losses, refer to page F-34F-35 in the "Critical Accounting Policies" section and pages F-50 andF-51 through F-52 in noteNote 1 to the consolidated financial statements of the Corporation's 20172018 Annual Report.
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.

The following table presents a summary of nonperforming assets and past due loans.
(dollar amounts in millions)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Nonaccrual loans:      
Business loans:      
Commercial$171
 $309
$114
 $141
Commercial mortgage29
 31
16
 20
Lease financing2
 4
2
 2
International4
 6
3
 3
Total nonaccrual business loans206
 350
135
 166
Retail loans:      
Residential mortgage29
 31
37
 36
Consumer:      
Home equity19
 21
19
 19
Total nonaccrual retail loans48
 52
56
 55
Total nonaccrual loans254
 402
191
 221
Reduced-rate loans8
 8
7
 8
Total nonperforming loans262
 410
198
 229
Foreclosed property2
 5
1
 1
Total nonperforming assets$264
 $415
$199
 $230
Nonperforming loans as a percentage of total loans0.53% 0.83%0.39% 0.46%
Nonperforming assets as a percentage of total loans and foreclosed property0.53
 0.84
0.40
 0.46
Ratio of allowance for loan losses to total nonperforming loans2.6x
 1.7x
Allowance for loan losses as a multiple of total nonperforming loans3.3x
 2.9x
Loans past due 90 days or more and still accruing$20
 $35
$24
 $16
Loans past due 90 days or more and still accruing as a percentage of total loans0.04% 0.07%0.05% 0.03%
Nonperforming assets decreased $151$31 million, or 13 percent, to $264$199 million at June 30, 2018March 31, 2019, from $415$230 million at December 31, 2017.2018. The decrease in nonperforming assets primarily reflected a $27 million decrease of $138 million in nonaccrual commercial loans, with the largest decreasesdeclines in Corporate Banking, Energygeneral Middle Market and Commercial Real Estate.Energy.
The following table presents a summary of TDRs at June 30, 2018March 31, 2019 and December 31, 2017.2018.
(in millions)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Nonperforming TDRs:      
Nonaccrual TDRs$120
 $182
$65
 $73
Reduced-rate TDRs8
 8
7
 8
Total nonperforming TDRs128
 190
72
 81
Performing TDRs (a)133
 123
97
 101
Total TDRs$261
 $313
$169
 $182
(a)TDRs that do not include a reduction in the original contractual interest rate which are performing in accordance with their modified terms.
At June 30, 2018,March 31, 2019, nonaccrual TDRs and performing TDRs included $57$24 million and $70$48 million of Energy loans, respectively, compared to $82$38 million and $43$46 million, respectively, at December 31, 2017.2018.
The following table presents a summary of changes in nonaccrual loans.
Three Months EndedThree Months Ended
(in millions)June 30, 2018 March 31, 2018 December 31, 2017March 31, 2019 December 31, 2018
Balance at beginning of period$326
 $402
 $444
$221
 $230
Loans transferred to nonaccrual (a)49
 71
 73
4
 42
Nonaccrual loan gross charge-offs(20) (37) (29)(20) (21)
Loans transferred to accrual status (a)
 (3) 

 (3)
Nonaccrual loans sold(15) (10) (22)
 (5)
Payments/other (b)(86) (97) (64)(14) (22)
Balance at end of period$254
 $326
 $402
$191
 $221
(a)Based on an analysis of nonaccrual loans with book balances greater than $2 million.
(b)Includes net changes related to nonaccrual loans with balances less than $2 million, payments on nonaccrual loans with book balances greater than $2 million and transfers of nonaccrual loans to foreclosed property.
There were ten borrowerswas one borrower with balancesa balance greater than $2 million, totaling $49 million transferred to nonaccrual status in the secondfirst quarter 2018,2019, compared to fiveten borrowers totaling $71 million, in the firstfourth quarter 2018.

The following table presents the composition of nonaccrual loans by balance and the related number of borrowers at June 30, 2018March 31, 2019 and December 31, 2017.2018.
June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
(dollar amounts in millions)
Number of
Borrowers
 Balance 
Number of
Borrowers
 Balance
Number of
Borrowers
 Balance 
Number of
Borrowers
 Balance
Under $2 million886
 $85
 939
 $85
797
 $80
 799
 $78
$2 million - $5 million13
 35
 16
 47
12
 32
 14
 41
$5 million - $10 million11
 80
 12
 93
8
 53
 10
 69
$10 million - $25 million4
 54
 8
 130
2
 26
 2
 33
Greater than $25 million
 
 1
 47
Total914
 $254
 976
 $402
819
 $191
 825
 $221
The following table presents a summary of nonaccrual loans at June 30, 2018March 31, 2019 and loans transferred to nonaccrual and net loan charge-offs for the three months ended June 30, 2018,March 31, 2019, based primarily on North American Industry Classification System (NAICS) categories.
June 30, 2018 Three Months Ended June 30, 2018March 31, 2019 Three Months Ended March 31, 2019
(dollar amounts in millions)Nonaccrual Loans 
Loans Transferred to
Nonaccrual (a)
 Net Loan  Charge-Offs (Recoveries)Nonaccrual Loans 
Loans Transferred to
Nonaccrual (a)
 Net Loan Charge-Offs (Recoveries)
Industry Category  
Residential Mortgage$37
 20% $
 % $
  %
Mining, Quarrying and Oil & Gas Extraction$60
 23% $6
 12% $4
33
 17
 
 
 9
 82
Manufacturing53
 21
 19
 39
 (10)29
 15
 
 
 (1) (13)
Residential Mortgage29
 11
 
 
 
Health Care & Social Assistance15
 8
 
 
 6
 52
Contractors12
 6
 
 
 
 
Services11
 6
 
 
 (1) (7)
Information & Communication9
 5
 4
 100
 
 
Real Estate & Home Builders17
 7
 
 
 (1)8
 4
 
 
 
 
Services15
 6
 
 
 (1)
Wholesale Trade15
 6
 19
 39
 5
4
 2
 
 
 
 
Contractors14
 6
 
 
 
Health Care & Social Assistance4
 2
 
 
 (3)
Information & Communication1
 
 5
 10
 2
Utilities
 
 
 
 1
Other (b)46
 18
 
 
 
33
 17
 
 
 (2) (14)
Total$254
 100% $49
 100% $(3)$191
 100% $4
 100% $11
 100 %
(a)Based on an analysis of nonaccrual loans with book balances greater than $2 million.
(b)Consumer, excluding residential mortgage and certain personal purpose nonaccrual loans and net charge-offs, are 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 were $20increased $8 million to $24 million at June 30, 2018March 31, 2019, compared to $35$16 million at December 31, 2017.2018. Loans past due 30-89 days decreased $150increased $14 million to $152$147 million at June 30, 2018,March 31, 2019, compared to $302$133 million at December 31, 2017.2018. Past due loans increased slightly from very low year-end levels. An aging analysis of loans included in noteNote 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 loans with balances of $1 million or more 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 noteNote 4 to the consolidated financial statements provides further information about the balances comprising total criticized loans.
(dollar amounts in millions)June 30, 2018 March 31, 2018 December 31, 2017March 31, 2019 December 31, 2018
Total criticized loans$1,765
 $2,120
 $2,231
$1,806
 $1,548
As a percentage of total loans3.5% 4.3% 4.5%3.6% 3.1%
The $466$258 million decreaseincrease in criticized loans in the sixthree months ended June 30, 2018March 31, 2019 included decreasesincreases of $189 million in Energy, $84 million in Technology and Life Sciences and $62$125 million in general Middle Market.

The following table presents a summary of changesMarket and $73 million in foreclosed property.Corporate Banking.
 Three Months Ended
(in millions)June 30, 2018 March 31, 2018 December 31, 2017
Balance at beginning of period$5
 $5
 6
Acquired in foreclosure1
 1
 2
Foreclosed property sold (a)(4) (1) (3)
Balance at end of period$2
 $5
 5
(a) Net gain on foreclosed property sold$1
 $
 1

Commercial Real Estate Lending
At March 31, 2019, the Corporation's commercial real estate portfolio represented 24 percent of total loans. The following table summarizes the Corporation's commercial real estate loan portfolio by loan category.
(in millions)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Real estate construction loans:      
Commercial Real Estate business line (a)$2,888
 $2,630
$2,888
 $2,687
Other business lines (b)369
 331
403
 390
Total real estate construction loans$3,257
 $2,961
$3,291
 $3,077
Commercial mortgage loans:      
Commercial Real Estate business line (a)$1,747
 $1,831
$1,739
 $1,743
Other business lines (b)7,377
 7,328
7,250
 7,363
Total commercial mortgage loans$9,124
 $9,159
$8,989
 $9,106
(a)Primarily loans to real estate developers.
(b)Primarily loans secured by owner-occupied real estate.
The Corporation limits risk inherent in its commercial real estate lending activities by monitoring borrowers directly involved in the commercial real estate markets and adhering to conservative policies on loan-to-value ratios for such loans. Commercial real estate loans, consisting of real estate construction and commercial mortgage loans, totaled $12.4$12.3 billion at June 30, 2018,March 31, 2019, of which $4.6 billion, or 3738 percent, were to borrowers in the Commercial Real Estate business line, which includes loans to real estate developers, an increase of $174$97 million compared to December 31, 2017.2018. The remaining $7.8$7.7 billion, or 6362 percent, of commercial real estate loans in other business lines consisted primarily of owner-occupied commercial mortgages, which bear credit characteristics similar to non-commercial real estate business loans.
The real estate construction loan portfolio primarily contains loans made to long-tenured customers with satisfactory completion experience. Credit quality in the real estate construction loan portfolio was strong, with criticized loans of $27 million and $4$31 million at June 30, 2018March 31, 2019 and December 31, 2017,2018, respectively, and no real estate construction loan charge-offs in either of the six-monththree-month periods ended June 30, 2018March 31, 2019 and 2017.2018.
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. Loans in the commercial mortgage portfolio generally mature within three to five years. CommercialCriticized commercial mortgage loans in the Commercial Real Estate business line on nonaccrual status totaled $9$61 million at both June 30, 2018March 31, 2019 and December 31, 2017, respectively.2018. In other business lines, $20$247 million and $22$206 million of commercial mortgage loans were on nonaccrual statuscriticized at June 30, 2018March 31, 2019 and December 31, 2017,2018, respectively. There were no commercialCommercial mortgage loan net charge-offs for the six months ended June 30, 2018 and net recoveries of $3were $1 million for the same period of 2017.three months ended March 31, 2019, compared to none for the three months ended March 31, 2018.
Residential Real Estate Lending
The following table summarizes the Corporation's residential mortgage and home equity loan portfolios by geographic market.
 June 30, 2018 December 31, 2017
(dollar amounts in millions)Residential
Mortgage
Loans
 % of
Total
 Home
Equity
Loans
 % of
Total
 Residential
Mortgage
Loans
 % of
Total
 Home
Equity
Loans
 % of
Total
Geographic market:               
Michigan$393
 20% $660
 38% $387
 19% $705
 39%
California981
 50
 679
 40
 1,023
 52
 718
 40
Texas305
 16
 335
 19
 297
 15
 335
 18
Other Markets275
 14
 57
 3
 281
 14
 58
 3
Total$1,954
 100% $1,731
 100% $1,988
 100% $1,816
 100%
Residential real estate loans, which consist of traditional residential mortgages and home equity loans and lines of credit, totaled $3.7 billion, or 7 percent of total loans, at June 30, 2018. March 31, 2019. The following table summarizes the Corporation's residential mortgage and home equity loan portfolios by geographic market.
 March 31, 2019 December 31, 2018
(dollar amounts in millions)Residential
Mortgage
Loans
 % of
Total
 Home
Equity
Loans
 % of
Total
 Residential
Mortgage
Loans
 % of
Total
 Home
Equity
Loans
 % of
Total
Geographic market:               
Michigan$398
 20% $637
 36% $406
 21% $650
 37%
California983
 51
 720
 41
 993
 50
 710
 40
Texas313
 16
 344
 19
 310
 16
 346
 20
Other Markets255
 13
 62
 4
 261
 13
 59
 3
Total$1,949
 100% $1,763
 100% $1,970
 100% $1,765
 100%
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.
Residential mortgages totaled $2.0$1.9 billion at June 30, 2018March 31, 2019, and were primarily larger, variable-rate mortgages originated and retained for certain private banking relationship customers. Of the $2.0$1.9 billion of residential mortgage loans outstanding, $29$37 million were on nonaccrual status at June 30, 2018.March 31, 2019. The home equity portfolio totaled $1.7$1.8 billion at June 30, 2018,March 31, 2019, of which $1.6 billion was outstanding under primarily variable-rate, interest-only home equity lines of credit, $132$116 million were onin amortizing

status and $40$32 million were closed-end home equity loans. Of the $1.7$1.8 billion of home equity loans outstanding, $19 million were on nonaccrual status at June 30, 2018.March 31, 2019. A majority of the home equity portfolio was secured by junior liens at June 30, 2018.March 31, 2019. 
Energy Lending
The Corporation has a portfolio ofLoans in the Corporation's Energy loans that isbusiness line are included primarilyalmost entirely in commercial loans in the Consolidated Balance Sheets. Customers in the Corporation's Energy line of business (approximately 160 relationships) are engaged in three segments of the oil and gas business: exploration and production (E&P), midstream and energy services. 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-annual borrowing base re-determinations based on a variety of factors including updated pricing (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.
The following table summarizes information about loans in the Corporation's portfolio of Energy loans.business line.
June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
(dollar amounts in millions)OutstandingsNonaccrualCriticized (a) OutstandingsNonaccrualCriticized (a)OutstandingsNonaccrualCriticized (a) OutstandingsNonaccrualCriticized (a)
Exploration and production (E&P)$1,400
81%58
$250
 $1,346
73%$94
$376
$1,856
78%$31
$176
 $1,771
82%$46
$143
Midstream243
14

33
 295
16

37
454
19

44
 298
14

43
Services91
5
2
36
 195
11
14
95
75
3
2
20
 94
4
2
19
Total Energy business line1,734
100%60
319
 1,836
100%108
508
$2,385
100%$33
$240
 $2,163
100%$48
$205
As a percentage of total Energy loansAs a percentage of total Energy loans3%18% 

 6%28%As a percentage of total Energy loans1%10% 

 2%9%
(a)Includes nonaccrual loans.
Loans in the Energy business line totaled $1.7$2.4 billion, or approximately 35 percent of total loans, at June 30, 2018March 31, 2019 and $1.8$2.2 billion, or approximately 4 percent of total loans, at December 31, 2017, a decrease2018, an increase of $102$222 million, or 610 percent. Total exposure, including unused commitments to extend credit and letters of credit, was approximately $4$4.8 billion and $4.5 billion at both June 30, 2018March 31, 2019 and December 31, 2017.2018, respectively.
The Corporation's allowance methodology considers the various risk elements within the loan portfolio. TheWhen merited, the Corporation continued tomay incorporate a qualitative reserve component for Energy loans at June 30, 2018. There were $4 million netloans. Net credit-related charge-offs for both the three- and six-month periods ended June 30, 2018 compared to $2 million and $15were $8 million for the three months ended March 31, 2019, compared to no net charge-offs for the same periodsperiod in 2017.2018.
Automotive Lending
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, totaled $4.2$4.5 billion at June 30, 2018March 31, 2019, a decrease of $120$151 million compared to $4.4$4.7 billion at December 31, 20172018. At both June 30, 2018March 31, 2019 and December 31, 2017,2018, other loans to automotive dealers in the National Dealer Services business line totaled $3.2$3.4 billion, and $3.1 billion, respectively, including $2.0 billion and $1.9 billion of owner-occupied commercial real estate mortgage loans at June 30, 2018both March 31, 2019 and December 31, 2017, respectively.2018. 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 $1.4 billion at June 30, 2018, compared to $1.3 billion at both March 31, 2019 and December 31, 2017.2018.
Leveraged Loans
Certain loans in the Corporation's commercial portfolio are considered leveraged transactions. These loans are typically used for mergers, acquisitions, business recapitalizations, refinancing and equity buyouts. To help mitigate the risk associated with these loans, the Corporation focuses on middle market companies with highly capable management teams, strong sponsors and solid track records of financial performance. Industries prone to cyclical downturns and acquisitions with a high degree of integration risk are generally avoided. Other considerations include the sufficiency of collateral, the level of balance sheet leverage and the adequacy of financial covenants. During the underwriting process, cash flows are stress tested to evaluate the borrowers' abilities to handle economic downturns and an increase in interest rates.
The FDIC defines higher-risk commercial and industrial (HR C&I) loans for assessment purposes as loans generally with leverage of four times total debt to earnings before interest, taxes and depreciation (EBITDA) as well as three times senior debt to EBITDA, excluding certain collateralized loans. HR C&I loans were $2.6 billion and $2.5 billion at March 31, 2019 and December 31, 2018, respectively. Criticized loans within the HR C&I loan portfolio were $176 million and $147 million at March 31, 2019 and December 31, 2018, respectively. Charge-offs of HR C&I loans totaled $5 million and $11 million for the three months ended March 31, 2019 and 2018, respectively.

For further discussion of credit risk, see the "Credit Risk" section of pages F-20F-21 through F-28F-29 in the Corporation's 20172018 Annual Report.
Market and Liquidity Risk
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. TheCorporate 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.
In addition to assessing liquidity risk on a consolidated basis, Corporate Treasury supportsalso monitors the parent company's liquidity and has established limits for the minimum number of months into the future in which the parent company can meet existing and forecasted obligations without the support of additional dividends from subsidiaries. ALCO's liquidity policy requires the parent company to maintain sufficient liquidity to meet expected capital and debt obligations with a target of 24 months but no less than 18 months.
Corporate Treasury and the Enterprise Risk Division support ALCO in measuring, monitoring and managing interest rate risk and, in coordination with Enterprise Risk, managingas well as 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; and (v) monitoring of industry trends and analytical tools to be used in the management of interest rate and all other market and liquidity risks; and (vi) developing and monitoring the interest rate risk economic capital estimate.risks.
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. The Corporation's loan composition at June 30, 2018March 31, 2019 was 6367 percent 30-day LIBOR, 109 percent other LIBOR (primarily 60-day), 1716 percent prime and 108 percent fixed rate. This creates sensitivity to interest rate movements due to the imbalance between the floating-rate loan portfolio and 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 fixed-rate investment securities, which provide liquidity to the balance sheet and act to mitigate the inherent interest sensitivity, as well as hedging with interest rate swaps.swaps and options. 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 strategiesstrategies.
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 as of the reporting date are included in the analysis, but no additional hedging is currently forecasted. TheseAt March 31, 2019, these derivative instruments currently comprise interest rate swaps that convert fixed-rate medium- and long-term debt to variable rates and $800 million of variable-rate loans to fixed 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 scenarios presented,The first scenario presents a 200 basis-point increase in 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). The second scenario presents a 200 basis-point decrease in short-term interest rates.

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. In this low rate environment, depositors have maintained a higher level of liquidity and their historical 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 June 30, 2018March 31, 2019 and December 31, 2017,2018, 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.
Estimated Annual ChangeEstimated Annual Change
June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
(in millions)Amount % Amount %Amount % Amount %
Change in Interest Rates:              
Rising 200 basis points$190
 8 % $197
 9 %$127
 5 % $142
 6 %
Declining to zero percent(323) (14) (283) (13)
Declining 200 basis points(285) (12) (313) (12)
Sensitivity to rising and declining rates was relatively stabledecreased from December 31, 20172018 to June 30, 2018. The risk to declining interest rates is impacted by an assumed floor on interest rates of zero percent, and therefore the DecemberMarch 31, 2017 sensitivity simulates a decline of 150 basis points while the June 30, 2018 sensitivity reflects a decline of 200 basis points2019 due to higher short termchanges in balance sheet composition and the impact of swaps converting variable-rate loans to fixed rates.
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 Corporation primarily monitors the percentage change on the base case economic value of equity. The economic value of equity analysis is based on an immediate parallel 200 basis point increase. The declining interest rate scenarios are based on decreases of 200 basis points and 150 basis points in interest rates at June 30, 2018 and December 31, 2017, respectively.shock.
The table below, as of June 30, 2018March 31, 2019 and December 31, 2017,2018, displays the estimated impact on the economic value of equity from the interest rate scenario described above.
June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
(in millions)Amount % Amount %Amount % Amount %
Change in Interest Rates:              
Rising 200 basis points$1,009
 7 % $1,188
 9 %$613
 5 % $711
 6 %
Declining to zero percent(2,893) (21) (2,635) (20)
Declining 200 basis points(2,593) (21) (2,769) (21)
The sensitivity of the economic value of equity to a 200 basis point parallel increase inrising and declining rates declined slightly between December 31, 2017 and June 30, 2018. The change in sensitivity of the economic value of equity to a parallel decrease in rates to zero during the same period was primarily driven by the increase in short-term rates between the periods, allowing for an additional 50 basis point decreasedecreased from December 31, 20172018 to March 31, 2019 due to similar factors described above in the June 30, 2018 scenario.net interest income sensitivity analysis.
Wholesale Funding
The Corporation may access the purchased funds market when necessary, which includes a variety of funding sources. Capacity for incremental purchased funds at June 30, 2018March 31, 2019 included short-term FHLB advances, the ability to purchase federal funds, sell securities under agreements to repurchase, as well as issue deposits through brokers. Purchased funds increased to $92Short-term borrowings totaled $944 million at June 30, 2018,March 31, 2019, compared to $25$52 million at December 31, 2017.2018. The increase in short-term borrowings reflected temporary increases in federal funds purchased and short-term FHLB advances. At June 30, 2018,March 31, 2019, the Bank had pledged loans totaling $22.1$23.6 billion which provided for up to $18.0$19.7 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 June 30, 2018March 31, 2019, $16.0$16.3 billion of real estate-related loans were pledged to the FHLB as blanket collateral for current and potential future borrowings. The Corporation had $3.8 billion of outstanding borrowings including $1.0 billion borrowed in February 2018, maturing between 2026 and 2028, $400 million in short-term advances and capacity for potential future borrowings of approximately $5.5$4.6 billion.
On July 31, 2018, the Corporation issued $850 million of 3.70% senior notes maturing in 2023, swapped to floating rate at 30-day LIBOR plus 80 basis points. Proceeds will be used for general corporate purposes, which may include working capital, investments in or advances to existing or future subsidiaries, and repurchases, maturities and redemptions of other outstanding securities. Pending such use, the net proceeds will be invested for the short term.
Additionally, as of June 30, 2018March 31, 2019 the Bank had the ability to issue up to $14$14.0 billion of debt under an existing $15$15.0 billion 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 June 30, 2018March 31, 2019, the three major rating agencies had assigned the following ratings below 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
June 30, 2018March 31, 2019RatingOutlook RatingOutlook
Standard and Poor’sBBB+Stable A-Stable
Moody’s Investors ServiceA3Stable A3Stable
Fitch RatingsAStable AStable
The Corporation satisfies liquidity needs with either liquid assets or various funding sources. Liquid assets totaled $17.3$15.4 billion at June 30, 2018March 31, 2019, compared to $17.4$16.3 billion at December 31, 20172018. Liquid assets include cash and due from banks, federal funds sold, interest-bearing deposits with banks, other short-term investments and unencumbered investment securities.
The Corporation performs monthly liquidity stress testing to evaluate its ability to meet funding needs in hypothetical stressed environments. Such environments cover a series of broad events, distinguished in terms of duration and severity. The evaluation as of June 30, 2018March 31, 2019 projected sufficient sources of liquidity were available under each series of events.

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 to the consolidated financial statements included in the Corporation's 20172018 Annual Report. 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, 2017,2018, 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 on pages F-34F-35 through F-37 in the Corporation's 20172018 Annual Report. As of the date of this report, there have been no significant changes to the Corporation's critical accounting policies or estimates.


SUPPLEMENTAL FINANCIAL DATA
The Corporation believes non-GAAP measures are meaningful because they reflect adjustments commonly made by management, investors, regulators and analysts to evaluate the adequacy of common equity and our performance trends. Tangible common equity is used by Comerica to measure the quality of capital and the return relative to balance sheet risk.
The following table provides a reconciliation of non-GAAP financial measures used in this financial review with financial measures defined by GAAP.
(dollar amounts in millions)June 30, 2018 December 31, 2017March 31, 2019 December 31, 2018
Tangible Common Equity Ratio:      
Common shareholders' equity$8,079
 $7,963
$7,409
 $7,507
Less:      
Goodwill635
 635
635
 635
Other intangible assets7
 8
5
 6
Tangible common equity$7,437
 $7,320
$6,769
 $6,866
Total assets$71,987
 $71,567
$70,690
 $70,818
Less:      
Goodwill635
 635
635
 635
Other intangible assets7
 8
5
 6
Tangible assets$71,345
 $70,924
$70,050
 $70,177
Common equity ratio11.22% 11.13%10.48% 10.60%
Tangible common equity ratio10.42
 10.32
9.66
 9.78
Tangible Common Equity per Share of Common Stock:      
Common shareholders' equity$8,079
 $7,963
$7,409
 $7,507
Tangible common equity7,437
 7,320
6,769
 6,866
Shares of common stock outstanding (in millions)171
 173
155
 160
Common shareholders' equity per share of common stock$47.27
 $46.07
$47.67
 $46.89
Tangible common equity per share of common stock43.51
 42.34
43.55
 42.89
The tangible common equity ratio removes the effect of intangible assets from capital and total assets. Tangible common equity per share of common stock removes the effect of intangible assets from common shareholders' equity per share of common stock.

ITEM 3. Quantitative and Qualitative Disclosures about Market Risk
Quantitative and qualitative disclosures for the current period can be found in the "Market and Liquidity Risk" section of "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations."
ITEM 4. Controls and Procedures
(a)
Evaluation of Disclosure Controls and Procedures. The Corporation maintains a set of disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act")) that are designed to ensure that information required to be disclosed by the Corporation in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission's rules and forms, and that such information is accumulated and communicated to the Corporation's management, including the Corporation's Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. Management has evaluated, with the participation of the Corporation's Chief Executive Officer and Chief Financial Officer, the effectiveness of the Corporation's disclosure controls and procedures as of the end of the period covered by this quarterly report (the "Evaluation Date"). Based on the evaluation, the Corporation's Chief Executive Officer and Chief Financial Officer have concluded that, as of the Evaluation Date, the Corporation's disclosure controls and procedures are effective.
(b)
Changes in Internal Control Over Financial Reporting. During the period to which this report relates, there have not been any changes in the Corporation's internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that have materially affected, or that are reasonably likely to materially affect, such controls.
PART II. OTHER INFORMATION
ITEM 1. Legal Proceedings
For information regarding the Corporation's legal proceedings, see "Part I. Item 1. Note 12 – Contingent Liabilities," which is incorporated herein by reference.
ITEM 1A. Risk Factors
Other than as set forth below, thereThere has been no material change in the Corporation’s risk factors as previously disclosed in our Form 10-K for the fiscal year ended December 31, 20172018 in response to Part I, Item 1A. of such Form 10-K. Such risk factors are incorporated herein by reference.     
Below we amend the following risk factors in our Form 10-K for the fiscal year ended December 31, 2017:
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, changes in trade policies and other factors, such as real estate values, energy prices, 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.

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, tariffs, 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.

ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds
For information regarding the Corporation's purchase of equity securities, see "Part I. Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations – Capital," which is incorporated herein by reference.

ITEM 6. Exhibits
Exhibit No. Description
   
3.1 
   
3.2 
   
3.3 
   
4 [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.]
   
10.1† 
10.2†
10.3†
10.4†
10.5†
   
10.6†10.2† 
10.7†
   
31.1 
   
31.2 
   
32 
   
101 Financial statements from Quarterly Report on Form 10-Q of the Registrant for the quarter ended June 30, 2018,March 31, 2019, formatted in Extensible Business Reporting Language: (i) the Consolidated Balance Sheets (unaudited), (ii) the Consolidated Statements of Comprehensive Income (unaudited), (iii) the Consolidated Statements of Changes in Shareholders' Equity (unaudited), (iv) the Consolidated Statements of Cash Flows (unaudited) and (v) the Notes to Consolidated Financial Statements (unaudited).
   
 Management contract or compensatory plan or arrangement.

SIGNATURE
Pursuant to the requirements 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.
 COMERICA INCORPORATED
 (Registrant)
  
 /s/ Mauricio A. Ortiz
 Mauricio A. Ortiz
 Senior Vice President and
 Chief Accounting Officer and
 Duly Authorized Officer
Date: July 31, 2018April 29, 2019

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