10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

______________________________

FORM 10-Q

______________________________

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2013

Or

o TRANSITION 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)

___________________________________________________________________________________

Delaware	38-1998421
(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, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ý Accelerated filer o Non-accelerated filer o (Do not check if a smaller reporting company) Smaller reporting company 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 October 24, 2013: 182,910,689 shares

COMERICA INCORPORATED AND SUBSIDIARIES

TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION
ITEM 1. Financial Statements
Consolidated Balance Sheets at September 30, 2013 (unaudited) and December 31, 2012	1
Consolidated Statements of Comprehensive Income for the Three and Nine Months Ended September 30, 2013 and 2012 (unaudited)	2
Consolidated Statements of Changes in Shareholders’ Equity for the Nine Months Ended September 30, 2013 and 2012 (unaudited)	3
Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2013 and 2012 (unaudited)	4
Notes to Consolidated Financial Statements (unaudited)	5
ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	37
ITEM 3. Quantitative and Qualitative Disclosures about Market Risk	68
ITEM 4. Controls and Procedures	68
PART II. OTHER INFORMATION
ITEM 1. Legal Proceedings	68
ITEM 1A. Risk Factors	68
ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds	68
ITEM 6. Exhibits	69
Signature	70

Part I. FINANCIAL INFORMATION

Item 1. Financial Statements

CONSOLIDATED BALANCE SHEETS

Comerica Incorporated and Subsidiaries

(in millions, except share data)	September 30, 2013			December 31, 2012
	(unaudited)
ASSETS
Cash and due from banks	$	1,384		$	1,395
Federal funds sold	—			100
Interest-bearing deposits with banks	5,704			3,039
Other short-term investments	106			125
Investment securities available-for-sale	9,488			10,297
Commercial loans	27,897			29,513
Real estate construction loans	1,552			1,240
Commercial mortgage loans	8,785			9,472
Lease financing	829			859
International loans	1,286			1,293
Residential mortgage loans	1,650			1,527
Consumer loans	2,152			2,153
Total loans	44,151			46,057
Less allowance for loan losses	(604		)	(629		)
Net loans	43,547			45,428
Premises and equipment	604			622
Accrued income and other assets	3,837			4,063
Total assets	$	64,670		$	65,069
LIABILITIES AND SHAREHOLDERS’ EQUITY
Noninterest-bearing deposits	$	23,896		$	23,279
Money market and interest-bearing checking deposits	21,697			21,273
Savings deposits	1,645			1,606
Customer certificates of deposit	5,180			5,531
Foreign office time deposits	491			502
Total interest-bearing deposits	29,013			28,912
Total deposits	52,909			52,191
Short-term borrowings	226			110
Accrued expenses and other liabilities	1,001			1,106
Medium- and long-term debt	3,565			4,720
Total liabilities	57,701			58,127
Common stock - $5 par value:
Authorized - 325,000,000 shares
Issued - 228,164,824 shares	1,141			1,141
Capital surplus	2,171			2,162
Accumulated other comprehensive loss	(541		)	(413		)
Retained earnings	6,239			5,931
Less cost of common stock in treasury - 44,483,659 shares at 9/30/13 and 39,889,610 shares at 12/31/12	(2,041		)	(1,879		)
Total shareholders’ equity	6,969			6,942
Total liabilities and shareholders’ equity	$	64,670		$	65,069

See notes to consolidated financial statements.

1

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited)

Comerica Incorporated and Subsidiaries 

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions, except per share data)	2013		2012		2013			2012
INTEREST INCOME
Interest and fees on loans	$	381	$	400	$	1,159		$	1,219
Interest on investment securities	54		57		159			179
Interest on short-term investments	4		3		10			9
Total interest income	439		460		1,328			1,407
INTEREST EXPENSE
Interest on deposits	13		17		43			54
Interest on medium- and long-term debt	14		16		43			49
Total interest expense	27		33		86			103
Net interest income	412		427		1,242			1,304
Provision for credit losses	8		22		37			63
Net interest income after provision for credit losses	404		405		1,205			1,241
NONINTEREST INCOME
Service charges on deposit accounts	53		53		161			162
Fiduciary income	41		39		128			116
Commercial lending fees	28		22		71			71
Letter of credit fees	17		19		49			54
Card fees	20		16		55			48
Foreign exchange income	9		9		27			29
Bank-owned life insurance	12		10		31			30
Brokerage fees	5		5		14			14
Net securities gains (losses)	1		—		(1		)	11
Other noninterest income	28		24		87			79
Total noninterest income	214		197		622			614
NONINTEREST EXPENSES
Salaries	196		192		566			582
Employee benefits	59		61		185			181
Total salaries and employee benefits	255		253		751			763
Net occupancy expense	41		40		119			121
Equipment expense	15		17		45			50
Outside processing fee expense	31		27		89			79
Software expense	22		23		66			67
Merger and restructuring charges	—		25		—			33
FDIC insurance expense	9		9		26			29
Advertising expense	6		7		18			21
Other real estate expense	1		2		3			6
Other noninterest expenses	37		46		132			161
Total noninterest expenses	417		449		1,249			1,330
Income before income taxes	201		153		578			525
Provision for income taxes	54		36		154			134
NET INCOME	147		117		424			391
Less income allocated to participating securities	2		1		6			4
Net income attributable to common shares	$	145	$	116	$	418		$	387
Earnings per common share:
Basic	$	0.80	$	0.61	$	2.28		$	2.00
Diluted	0.78		0.61		2.23			2.00
Comprehensive income	144		165		296			494
Cash dividends declared on common stock	31		29		95			78
Cash dividends declared per common share	0.17		0.15		0.51			0.40

See notes to consolidated financial statements.

2

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY (unaudited)

Comerica Incorporated and Subsidiaries

	Common Stock							Accumulated Other Comprehensive Loss									Total Shareholders’ Equity
(in millions, except per share data)	Shares Outstanding		Amount		Capital Surplus						Retained Earnings			Treasury Stock
BALANCE AT DECEMBER 31, 2011	197.3		$	1,141	$	2,170		$	(356	)	$	5,546		$	(1,633	)	$	6,868
Net income	—		—		—			—			391			—			391
Other comprehensive income, net of tax	—		—		—			103			—			—			103
Cash dividends declared on common stock ($0.40 per share)	—		—		—			—			(78		)	—			(78		)
Purchase of common stock	(7.1	)	—		—			—			—			(215		)	(215		)
Net issuance of common stock under employee stock plans	1.2		—		(48		)	—			(28		)	62			(14		)
Share-based compensation	—		—		29			—			—			—			29
Other	—		—		2			—			—			(2		)	—
BALANCE AT SEPTEMBER 30, 2012	191.4		$	1,141	$	2,153		$	(253	)	$	5,831		$	(1,788	)	$	7,084
BALANCE AT DECEMBER 31, 2012	188.3		$	1,141	$	2,162		$	(413	)	$	5,931		$	(1,879	)	$	6,942
Net income	—		—		—			—			424			—			424
Other comprehensive loss, net of tax	—		—		—			(128		)	—			—			(128		)
Cash dividends declared on common stock ($0.51 per share)	—		—		—			—			(95		)	—			(95		)
Purchase of common stock	(5.8	)	—		—			—			—			(218		)	(218		)
Net issuance of common stock under employee stock plans	1.2		—		(18		)	—			(21		)	56			17
Share-based compensation	—		—		27			—			—			—			27
BALANCE AT SEPTEMBER 30, 2013	183.7		$	1,141	$	2,171		$	(541	)	$	6,239		$	(2,041	)	$	6,969

See notes to consolidated financial statements.

3

CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited)

Comerica Incorporated and Subsidiaries

	Nine Months Ended September 30,
(in millions)	2013			2012
OPERATING ACTIVITIES
Net income	$	424		$	391
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	37			63
Provision (benefit) for deferred income taxes	(6		)	69
Depreciation and amortization	92			100
Net periodic defined benefit cost	65			60
Share-based compensation expense	27			29
Net amortization of securities	21			35
Accretion of loan purchase discount	(26		)	(58		)
Net securities losses (gains)	1			(11		)
Excess tax benefits from share-based compensation arrangements	(3		)	(1		)
Net change in:
Trading securities	15			14
Accrued income receivable	9			3
Accrued expenses payable	(13		)	(21		)
Other, net	(193		)	72
Net cash provided by operating activities	450			745
INVESTING ACTIVITIES
Investment securities available-for-sale:
Maturities and redemptions	2,418			2,817
Purchases	(1,899		)	(3,194		)
Net change in loans	1,864			(1,620		)
Sales of Federal Home Loan Bank stock	41			3
Other, net	(60		)	(29		)
Net cash provided by (used in) investing activities	2,364			(2,023		)
FINANCING ACTIVITIES
Net change in:
Deposits	999			2,141
Short-term borrowings	116			(7		)
Medium- and long-term debt:
Maturities and redemptions	(1,080		)	(193		)
Common stock:
Repurchases	(218		)	(215		)
Cash dividends paid	(92		)	(69		)
Excess tax benefits from share-based compensation arrangements	3			1
Other, net	12			2
Net cash (used in) provided by financing activities	(260		)	1,660
Net increase in cash and cash equivalents	2,554			382
Cash and cash equivalents at beginning of period	4,534			3,556
Cash and cash equivalents at end of period	$	7,088		$	3,938
Interest paid	$	88		$	101
Income taxes, tax deposits and tax-related interest paid	104			38
Noncash investing and financing activities:
Loans transferred to other real estate	10			31

See notes to consolidated financial statements.

4

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 nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. 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, 2012.

Allowance for Loan Losses

The allowance for loan losses represents management’s assessment of probable, estimable losses inherent in the Corporation’s loan portfolio. The allowance for loan losses includes specific allowances, based on individual evaluations of certain loans, and allowances for homogeneous pools of loans with similar risk characteristics.

The allowance for business loans which do not meet the criteria to be evaluated individually is determined by applying standard reserve factors to the pool of business loans within each internal risk rating. In the first quarter 2013, the Corporation enhanced the approach utilized for determining standard reserve factors by changing from a dollar-based migration method for developing probability of default statistics to a count-based method. Under the dollar-based method, each dollar that moved to default received equal weight in the determination of standard reserve factors for each internal risk rating. As a result, the movement of larger loans impacted standard reserve factors more than the movement of smaller loans. By moving to a count-based approach, where each loan that moves to default receives equal weighting, unusually large or small loans will not have a disproportionate influence on the standard reserve factors. The change resulted in a $40 million increase to the allowance for loan losses at March 31, 2013.

Recently Adopted Accounting Pronouncements

In the first quarter 2013, the Corporation adopted amendments to GAAP which require enhanced disclosures about the nature and effect or potential effect of an entity's rights of setoff associated with its derivative and certain other financial instruments. The required disclosures are provided in Note 5 to these unaudited financial statements.

In the third quarter 2013, the Financial Accounting Standards Board (FASB) issued an amendment to GAAP which permits the Overnight Index Swap Rate, also referred to as the Fed Funds Effective Swap Rate, to be used as a benchmark interest rate for hedge accounting purposes, effective for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. The amendment also removed the restriction on using different benchmark rates for similar hedges. While the adoption of this amendment had no impact on the Corporation's financial condition and results of operations, to the extent to Corporation enters into new (or redesignates existing) hedging relationships in the future, the Overnight Index Swap Rate will be included in the spectrum of available benchmark interest rates for hedge accounting.

Pending Accounting Pronouncements

In July 2013, the FASB issued Accounting Standards Update (ASU) No. 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists,” (ASU 2013-11). ASU 2013-11 requires an unrecognized tax benefit be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward (collectively referred to as a “tax attribute carryforward”), unless the jurisdiction from which the tax attribute carryforward arose does not allow for such treatment. To the extent that a company does not have a tax attribute carryforward as of the reporting date, the unrecognized tax benefit is to be reported as a liability. The Corporation will adopt ASU 2013-11 in the first quarter 2014. The Corporation does not expect the adoption of ASU 2013-11 to have a material effect on the Corporation's financial condition and results of operations.

5

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

NOTE 2 – FAIR VALUE MEASUREMENTS

The Corporation utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. In cases where quoted market values in an active market are not available, the Corporation uses present value techniques and other valuation methods to estimate the fair values of its financial instruments. These valuation methods require considerable judgment and the resulting estimates of fair value can be significantly affected by the assumptions made and methods used.

Fair value is an estimate of the exchange price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (i.e., not a forced transaction, such as a liquidation or distressed sale) between market participants at the measurement date. However, the calculated fair value estimates in many instances cannot be substantiated by comparison to independent markets and, in many cases, may not be realizable in a current sale of the financial instrument.

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

The Corporation categorizes assets and liabilities recorded at fair value on a recurring or nonrecurring basis and the estimated fair value of financial instruments not recorded at fair value on a recurring basis into a three-level hierarchy, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value.

Level 1	Valuation is based upon quoted prices for identical instruments traded in active markets.
Level 2	Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
Level 3	Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques.

The Corporation generally utilizes third-party pricing services to value Level 1 and Level 2 trading and investment securities, as well as certain derivatives designated as fair value hedges. Management reviews the methodologies and assumptions used by the third-party pricing services and evaluates the values provided, principally by comparison with other available market quotes for similar instruments and/or analysis based on internal models using available third-party market data. The Corporation may occasionally adjust certain values provided by the third-party pricing service when management believes, as the result of its review, that the adjusted price most appropriately reflects the fair value of the particular security.

Following are descriptions of the valuation methodologies and key inputs used to measure financial assets and liabilities recorded at fair value, as well as a description of the methods and significant assumptions used to estimate fair value disclosures for financial instruments not recorded at fair value in their entirety on a recurring basis. The descriptions include an indication of the level of the fair value hierarchy in which the assets or liabilities are classified. Transfers of assets or liabilities between levels of the fair value hierarchy are recognized at the beginning of the reporting period, when applicable.

Cash and due from banks, federal funds sold and interest-bearing deposits with banks

Due to their short-term nature, the carrying amount of these instruments approximates the estimated fair value. As such, the Corporation classifies the estimated fair value of these instruments as Level 1.

Trading securities and associated deferred compensation plan liabilities

Securities held for trading purposes and associated deferred compensation plan liabilities are recorded at fair value on a recurring basis and included in “other short-term investments” and “accrued expenses and other liabilities,” respectively, on the consolidated balance sheets. Level 1 securities held for trading purposes include assets related to employee deferred compensation plans, which are invested in mutual funds, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and other securities traded on an active exchange, such as the New York Stock Exchange. Deferred compensation plan liabilities represent the fair value of the obligation to the employee, which corresponds to the fair value of the invested assets. Level 2 trading securities include municipal bonds and residential mortgage-backed securities issued by U.S. government-sponsored entities and corporate debt securities. Securities classified as Level 3 include securities in less liquid markets and

6

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

securities not rated by a credit agency. The methods used to value trading securities are the same as the methods used to value investment securities available-for-sale, discussed below.

Loans held-for-sale

Loans held-for-sale, included in “other short-term investments” on the consolidated balance sheets, are recorded at the lower of cost or fair value. Loans held-for-sale may be carried at fair value on a nonrecurring basis when fair value is less than cost. The fair value is based on what secondary markets are currently offering for portfolios with similar characteristics. As such, the Corporation classifies both loans held-for-sale subjected to nonrecurring fair value adjustments and the estimated fair value of loans held-for sale as Level 2.

Investment securities available-for-sale

Investment securities available-for-sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available or the market is deemed to be inactive at the measurement date, an adjustment to the quoted prices may be necessary. In some circumstances, the Corporation may conclude that a change in valuation technique or the use of multiple valuation techniques may be appropriate to estimate an instrument's fair value. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and money market funds. Level 2 securities include residential mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored entities and corporate debt securities. The fair value of Level 2 securities was determined using quoted prices of securities with similar characteristics, or pricing models based on observable market data inputs, primarily interest rates, spreads and prepayment information.

Securities classified as Level 3, of which the substantial majority is auction-rate securities, represent securities in less liquid markets requiring significant management assumptions when determining fair value. Due to the lack of a robust secondary auction-rate securities market with active fair value indicators, fair value for all periods presented was determined using an income approach based on a discounted cash flow model. The discounted cash flow model utilizes two significant inputs: discount rate and workout period. The discount rate was calculated using credit spreads of the underlying collateral or similar securities plus a liquidity risk premium. The liquidity risk premium was derived from the rate at which various types of similar auction-rate securities had been redeemed or sold. The workout period was based on an assessment of publicly available information on efforts to re-establish functioning markets for these securities and the Corporation's own redemption experience. Significant increases in any of these inputs in isolation would result in a significantly lower fair value. Additionally, as the discount rate incorporates the liquidity risk premium, a change in an assumption used for the liquidity risk premium would be accompanied by a directionally similar change in the discount rate. The Corporate Development Department, with appropriate oversight and approval provided by senior management, is responsible for determining the valuation methodology for auction-rate securities and for updating significant inputs based on changes to the factors discussed above. Valuation results, including an analysis of changes to the valuation methodology and significant inputs, are provided to senior management for review on a quarterly basis.

Loans

The Corporation does not record loans at fair value on a recurring basis. However, the Corporation may establish a specific allowance for an impaired loan based on the fair value of the underlying collateral. Such loan values are reported as nonrecurring fair value measurements. Collateral values supporting individually evaluated impaired loans are evaluated quarterly. When management determines that the fair value of the collateral requires additional adjustments, either as a result of non-current appraisal value or when there is no observable market price, the Corporation classifies the impaired loan as Level 3. The Special Assets Group is responsible for performing quarterly credit quality reviews for all impaired loans as part of the quarterly allowance for loan losses process overseen by the Chief Credit Officer, during which valuation adjustments to updated collateral values are determined.

The Corporation discloses fair value estimates for loans not recorded at fair value. The estimated fair value is determined based on characteristics such as loan category, repricing features and remaining maturity, and includes prepayment and credit loss estimates. For variable rate business loans that reprice frequently, the estimated fair value is based on carrying values adjusted for estimated credit losses inherent in the portfolio at the balance sheet date. For other business loans and retail loans, fair values are estimated using a discounted cash flow model that employs a discount rate that reflects the Corporation's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Corporation classifies the estimated fair value of loans held for investment as Level 3.

7

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

Customers’ liability on acceptances outstanding and acceptances outstanding

Customers' liability on acceptances outstanding is included in "accrued income and other assets" and acceptances outstanding are included in "accrued expenses and other liabilities" on the consolidated balance sheets. Due to their short-term nature, the carrying amount of these instruments approximates the estimated fair value. As such, the Corporation classifies the estimated fair value of these instruments as Level 1.

Derivative assets and derivative liabilities

Derivative instruments held or issued for risk management or customer-initiated activities are traded in over-the-counter markets where quoted market prices are not readily available. Fair value for over-the-counter derivative instruments is measured on a recurring basis using internally developed models that use primarily market observable inputs, such as yield curves and option volatilities. The Corporation manages credit risk for its over-the-counter derivative positions on a counterparty-by-counterparty basis and calculates credit valuation adjustments, included in the fair value of these instruments, on the basis of its relationships at the counterparty portfolio/master netting agreement level. These credit valuation adjustments are determined by applying a credit spread for the counterparty or the Corporation, as appropriate, to the total expected exposure of the derivative after considering collateral and other master netting arrangements. These adjustments, which are considered Level 3 inputs, are based on estimates of current credit spreads to evaluate the likelihood of default. The Corporation assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and determined that the credit valuation adjustments were not significant to the overall valuation of its derivatives. As a result, the Corporation classifies its over-the-counter derivative valuations in Level 2 of the fair value hierarchy. Examples of Level 2 derivative instruments are interest rate swaps and energy derivative and foreign exchange contracts.

Warrants which contain a net exercise provision or a non-contingent put right embedded in the warrant agreement are accounted for as derivatives and recorded at fair value on a recurring basis using a Black-Scholes valuation model. The Black-Scholes valuation model utilizes five inputs: risk-free rate, expected life, volatility, exercise price, and the per share market value of the underlying company. The Corporation holds a portfolio of warrants for generally nonmarketable equity securities with a fair value of $2 million at September 30, 2013. These warrants are primarily from high technology, non-public companies obtained as part of the loan origination process. The Corporate Development Department is responsible for the warrant valuation process, which includes reviewing all significant inputs for reasonableness, and for providing valuation results to senior management. Increases in any of these inputs in isolation, with the exception of exercise price, would result in a higher fair value. Increases in exercise price in isolation would result in a lower fair value. The Corporation classifies warrants accounted for as derivatives as Level 3.

The Corporation also holds a derivative contract associated with the 2008 sale of its remaining ownership of Visa Inc. (Visa) Class B shares. Under the terms of the derivative contract, the Corporation will compensate the counterparty primarily for dilutive adjustments made to the conversion factor of the Visa Class B to Class A shares based on the ultimate outcome of litigation involving Visa. Conversely, the Corporation will be compensated by the counterparty for any increase in the conversion factor from anti-dilutive adjustments. At September 30, 2013, the fair value of the contract was a liability of $2 million. The recurring fair value of the derivative contract is based on unobservable inputs consisting of management's estimate of the litigation outcome, timing of litigation settlements and payments related to the derivative. Significant increases in the estimate of litigation outcome and the timing of litigation settlements in isolation would result in a significantly higher liability fair value. Significant increases in payments related to the derivative in isolation would result in a significantly lower liability fair value. The Corporation classifies the derivative liability as Level 3.

Nonmarketable equity securities

The Corporation has a portfolio of indirect (through funds) private equity and venture capital investments with a carrying value and unfunded commitments of $13 million and $6 million, respectively, at September 30, 2013. These funds generally cannot be redeemed and the majority are not readily marketable. Distributions from these funds are received by the Corporation as a result of the liquidation of underlying investments of the funds and/or as income distributions. It is estimated that the underlying assets of the funds will be liquidated over a period of up to 16 years. The investments are accounted for on the cost or equity method and are individually reviewed for impairment on a quarterly basis by comparing the carrying value to the estimated fair value. These investments may be carried at fair value on a nonrecurring basis when they are deemed to be impaired and written down to fair value. Where there is not a readily determinable fair value, the Corporation estimates fair value for indirect private equity and venture capital investments based on the Corporation's percentage ownership in the fund and the net asset value, as reported by the fund, after indication that the fund adheres to applicable fair value measurement guidance. For those funds where the net asset value is not reported by the fund, the Corporation derives the fair value of the fund by estimating the fair value of each underlying investment in the fund. In addition to using qualitative information about each underlying investment, as provided by the fund, the Corporation gives consideration to information pertinent to the specific nature of the debt or equity investment, such

8

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

as relevant market conditions, offering prices, operating results, financial conditions, exit strategy and other qualitative information, as available. The lack of an independent source to validate fair value estimates, including the impact of future capital calls and transfer restrictions, is an inherent limitation in the valuation process. On a quarterly basis, the Corporate Development Department is responsible, with appropriate oversight and approval provided by senior management, for performing the valuation procedures and updating significant inputs, as are primarily provided by the underlying fund's management. The Corporation classifies fair value measurements of nonmarketable equity securities as Level 3. Commitments to fund additional investments in nonmarketable equity securities recorded at fair value on a nonrecurring basis were insignificant and $2 million at September 30, 2013 and December 31, 2012, respectively.

The Corporation also holds restricted equity investments, primarily Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) stock. Restricted equity securities are not readily marketable and are recorded at cost (par value) and evaluated for impairment based on the ultimate recoverability of the par value. No significant observable market data for these instruments is available. The Corporation considers the profitability and asset quality of the issuer, dividend payment history and recent redemption experience when determining the ultimate recoverability of the par value. The Corporation’s investment in FHLB stock totaled $48 million and $89 million at September 30, 2013 and December 31, 2012, respectively, and its investment in FRB stock totaled $85 million at both September 30, 2013 and December 31, 2012. The Corporation believes its investments in FHLB and FRB stock are ultimately recoverable at par. Therefore, the carrying amount for these restricted equity investments approximates fair value. The Corporation classifies the estimated fair value of such investments as Level 1.

Other real estate

Other real estate is included in “accrued income and other assets” on the consolidated balance sheets and includes primarily foreclosed property. Foreclosed property is initially recorded at fair value, less costs to sell, at the date of foreclosure, establishing a new cost basis. Subsequently, foreclosed property is carried at the lower of cost or fair value, less costs to sell. Other real estate may be carried at fair value on a nonrecurring basis when fair value is less than cost. Fair value is based upon independent market prices, appraised value or management's estimate of the value of the property. The Special Assets Group obtains updated independent market prices and appraised values, as required by state regulation or deemed necessary based on market conditions, and determines if additional write-downs are necessary. On a quarterly basis, senior management reviews all other real estate and determines whether the carrying values are reasonable, based on the length of time elapsed since receipt of independent market price or appraised value and current market conditions. Other real estate carried at fair value based on an observable market price or a current appraised value is classified by the Corporation as Level 2. When management determines that the fair value of other real estate requires additional adjustments, either as a result of a non-current appraisal or when there is no observable market price, the Corporation classifies the other real estate as Level 3.

Loan servicing rights

Loan servicing rights with a carrying value of $1 million at September 30, 2013, included in “accrued income and other assets” on the consolidated balance sheets and primarily related to Small Business Administration loans, are subject to impairment testing. Loan servicing rights may be carried at fair value on a nonrecurring basis when impairment testing indicates that the fair value of the loan servicing rights is less than the recorded value. A valuation model is used for impairment testing on a quarterly basis, which utilizes a discounted cash flow model, using interest rates and prepayment speed assumptions currently quoted for comparable instruments and a discount rate determined by management. On a quarterly basis, the Accounting Department is responsible for performing the valuation procedures and updating significant inputs, which are primarily obtained from available third-party market data, with appropriate oversight and approval provided by senior management. If the valuation model reflects a value less than the carrying value, loan servicing rights are adjusted to fair value through a valuation allowance as determined by the model. As such, the Corporation classifies loan servicing rights as Level 3.

Deposit liabilities

The estimated fair value of checking, savings and certain money market deposit accounts is represented by the amounts payable on demand. The estimated fair value of term deposits is calculated by discounting the scheduled cash flows using the period-end rates offered on these instruments. As such, the Corporation classifies the estimated fair value of deposit liabilities as Level 2.

Short-term borrowings

The carrying amount of federal funds purchased, securities sold under agreements to repurchase and other short-term borrowings approximates the estimated fair value. As such, the Corporation classifies the estimated fair value of short-term borrowings as Level 1.

9

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

Medium- and long-term debt

The carrying value of variable-rate FHLB advances approximates the estimated fair value. The estimated fair value of the Corporation's remaining variable- and fixed-rate medium- and long-term debt is based on quoted market values when available. If quoted market values are not available, the estimated fair value is based on the market values of debt with similar characteristics. The Corporation classifies the estimated fair value of medium- and long-term debt as Level 2.

Credit-related financial instruments

Credit-related financial instruments include unused commitments to extend credit and standby and commercial letters of credit. These instruments generate ongoing fees which are recognized over the term of the commitment. In situations where credit losses are probable, the Corporation records an allowance. The carrying value of these instruments included in "accrued expenses and other liabilities" on the consolidated balance sheets, which includes the carrying value of the deferred fees plus the related allowance, approximates the estimated fair value. The Corporation classifies the estimated fair value of credit-related financial instruments as Level 3.

ASSETS AND LIABLILITIES RECORDED AT FAIR VALUE ON A RECURRING BASIS

The following tables present the recorded amount of assets and liabilities measured at fair value on a recurring basis as of September 30, 2013 and December 31, 2012.

(in millions)	Total		Level 1		Level 2		Level 3
September 30, 2013
Trading securities:
Deferred compensation plan assets	$	92	$	92	$	—	$	—
Equity and other non-debt securities	6		6		—		—
Residential mortgage-backed securities (a)	3		—		3		—
State and municipal securities	2		—		2		—
Corporate debt securities	1		—		1		—
Total trading securities	104		98		6		—
Investment securities available-for-sale:
U.S. Treasury and other U.S. government agency securities	45		45		—		—
Residential mortgage-backed securities (a)	9,089		—		9,089		—
State and municipal securities	25		—		—		25		(b)
Corporate debt securities	57		—		56		1		(b)
Equity and other non-debt securities	272		131		—		141		(b)
Total investment securities available-for-sale	9,488		176		9,145		167
Derivative assets:
Interest rate contracts	416		—		416		—
Energy derivative contracts	128		—		128		—
Foreign exchange contracts	19		—		19		—
Warrants	2		—		—		2
Total derivative assets	565		—		563		2
Total assets at fair value	$	10,157	$	274	$	9,714	$	169
Derivative liabilities:
Interest rate contracts	$	147	$	—	$	147	$	—
Energy derivative contracts	126		—		126		—
Foreign exchange contracts	13		—		13		—
Other	2		—		—		2
Total derivative liabilities	288		—		286		2
Deferred compensation plan liabilities	92		92		—		—
Total liabilities at fair value	$	380	$	92	$	286	$	2

(a) Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

(b) Auction-rate securities.

10

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

(in millions)	Total		Level 1		Level 2		Level 3
December 31, 2012
Trading securities:
Deferred compensation plan assets	$	88	$	88	$	—	$	—
Residential mortgage-backed securities (a)	4		—		4		—
State and municipal securities	19		—		19		—
Corporate debt securities	3		—		3		—
Total trading securities	114		88		26		—
Investment securities available-for-sale:
U.S. Treasury and other U.S. government agency securities	35		35		—		—
Residential mortgage-backed securities (a)	9,920		—		9,920		—
State and municipal securities	23		—		—		23		(b)
Corporate debt securities	58		—		57		1		(b)
Equity and other non-debt securities	261		105		—		156		(b)
Total investment securities available-for-sale	10,297		140		9,977		180
Derivative assets:
Interest rate contracts	556		—		556		—
Energy derivative contracts	173		—		173		—
Foreign exchange contracts	21		—		21		—
Warrants	3		—		—		3
Total derivative assets	753		—		750		3
Total assets at fair value	$	11,164	$	228	$	10,753	$	183
Derivative liabilities:
Interest rate contracts	$	218	$	—	$	218	$	—
Energy derivative contracts	172		—		172		—
Foreign exchange contracts	18		—		18		—
Other	1		—		—		1
Total derivative liabilities	409		—		408		1
Deferred compensation plan liabilities	88		88		—		—
Total liabilities at fair value	$	497	$	88	$	408	$	1

(a) Residential mortgage-backed securities 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 the three- and nine-month periods ended September 30, 2013 and 2012.

11

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 nine-month periods ended September 30, 2013 and 2012.

			Net Realized/Unrealized Gains (Losses) (Pretax)
	Balance  at Beginning of Period		Recorded in Earnings								Recorded in Other Comprehensive Income										Balance  at End of  Period
(in millions)			Realized				Unrealized								Sales			Settlements
Three Months Ended September 30, 2013
Investment securities available-for-sale:
State and municipal securities (a)	$	25	$	—			$	—			$	—			$	—		$	—		$	25
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	146		1			(c)	—				5			(b)	(11		)	—			141
Total investment securities available-for-sale	172		1			(c)	—				5			(b)	(11		)	—			167
Derivative assets:
Warrants	3		7			(d)	—				—				(2		)	(6		)	2
Derivative liabilities:
Other	3		—				—				—				—			(1		)	2
Three Months Ended September 30, 2012
Investment securities available-for-sale:
State and municipal securities (a)	$	24	$	—			$	—			$	(1	)	(b)	$	—		$	—		$	23
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	215		1			(c)	—				—				(12		)	—			204
Total investment securities available-for-sale	240		1			(c)	—				(1		)	(b)	(12		)	—			228
Derivative assets:
Warrants	3		—				—				—				—			—			3
Derivative liabilities:
Other	—		(1		)	(c)	—				—				—			(1		)	—
Nine Months Ended September 30, 2013
Investment securities available-for-sale:
State and municipal securities (a)	$	23	$	—			$	—			$	2		(b)	$	—		$	—		$	25
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	156		1			(c)	—				(1		)	(b)	(15		)	—			141
Total investment securities available-for-sale	180		1			(c)	—				1			(b)	(15		)	—			167
Derivative assets:
Warrants	3		8			(d)	1			(d)	—				(4		)	(6		)	2
Derivative liabilities:
Other	1		—				(2		)	(c)	—				—			(1		)	2
Nine Months Ended September 30, 2012
Investment securities available-for-sale:
State and municipal securities (a)	$	24	$	—			$	—			$	—			$	(1	)	$	—		$	23
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	408		12			(c)	—				11			(b)	(227		)	—			204
Total investment securities available-for-sale	433		12			(c)	—				11			(b)	(228		)	—			228
Derivative assets:
Warrants	3		3			(d)	1			(d)	—				(4		)	—			3
Derivative liabilities:
Other	6		(1		)	(c)	—				—				—			(7		)	—

(a) Auction-rate securities.

(b) Recorded in "net unrealized gains (losses) on investment securities available-for-sale" in other comprehensive income.

(c) Realized and unrealized gains and losses due to changes in fair value recorded in "net securities gains (losses)" on the consolidated statements of comprehensive income.

(d) Realized and unrealized gains and losses due to changes in fair value recorded in "other noninterest income" on the consolidated statements of comprehensive income.

12

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

ASSETS AND LIABILITIES RECORDED AT FAIR VALUE ON A NONRECURRING BASIS

The Corporation may be required, from time to time, to record certain assets and liabilities at fair value on a nonrecurring basis. These include assets that are recorded at the lower of cost or fair value that were recognized at fair value below cost at the end of the period. All assets recorded at fair value on a nonrecurring basis were classified as Level 3 at September 30, 2013 and December 31, 2012 and are presented in the following table. No liabilities were recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012.

(in millions)	Level 3
September 30, 2013
Loans:
Commercial	$	70
Real estate construction	23
Commercial mortgage	96
Total loans	189
Nonmarketable equity securities	1
Other real estate	12
Loan servicing rights	1
Total assets at fair value	$	203
December 31, 2012
Loans:
Commercial	$	42
Real estate construction	25
Commercial mortgage	145
Lease financing	2
Total loans	214
Nonmarketable equity securities	2
Other real estate	24
Loan servicing rights	2
Total assets at fair value	$	242

Level 3 assets recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012 included loans for which a specific allowance was established based on the fair value of collateral and other real estate for which fair value of the properties was less than the cost basis. For both asset classes, the unobservable inputs were the additional adjustments applied by management to the appraised values to reflect such factors as non-current appraisals and revisions to estimated time to sell. These adjustments are determined based on qualitative judgments made by management on a case-by-case basis and are not quantifiable inputs, although they are used in the determination of fair value.

The following table presents quantitative information related to the significant unobservable inputs utilized in the Corporation's Level 3 recurring fair value measurement as of September 30, 2013 and December 31, 2012. The Corporation's Level 3 recurring fair value measurements include auction-rate securities where fair value is determined using an income approach based on a discounted cash flow model. The inputs in the table below reflect management's expectation of continued illiquidity in the secondary auction-rate securities market due to a lack of market activity for the issuers remaining in the portfolio, a lack of market incentives for issuer redemptions, and the expectation for the low interest rate environment continuing into 2015. The September 30, 2013 discount rates reflect changes in liquidity premiums based on sustained illiquid market conditions for the securities during the third quarter 2013.

			Discounted Cash Flow Model
			Unobservable Input
	Fair Value (in millions)		Discount Rate	Workout Period (in years)
September 30, 2013
State and municipal securities (a)	$	25	5% - 11%	4 - 5
Equity and other non-debt securities (a)	141		6% - 8%	2 - 3
December 31, 2012
State and municipal securities (a)	$	23	6% - 10%	4 - 6
Equity and other non-debt securities (a)	156		4% - 6%	2 - 4

(a) Auction-rate securities.

13

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

ESTIMATED FAIR VALUES OF FINANCIAL INSTRUMENTS NOT RECORDED AT FAIR VALUE ON A RECURRING BASIS

The Corporation typically holds the majority of its financial instruments until maturity and thus does not expect to realize many of the estimated fair value amounts disclosed. The disclosures also do not include estimated fair value amounts for items that are not defined as financial instruments, but which have significant value. These include such items as core deposit intangibles, the future earnings potential of significant customer relationships and the value of trust operations and other fee generating businesses. The Corporation believes the imprecision of an estimate could be significant.

The carrying amount and estimated fair value of financial instruments not recorded at fair value in their entirety on a recurring basis on the Corporation’s consolidated balance sheets are as follows:

	Carrying Amount			Estimated Fair Value
(in millions)				Total			Level 1		Level 2		Level 3
September 30, 2013
Assets
Cash and due from banks	$	1,384		$	1,384		$	1,384	$	—	$	—
Interest-bearing deposits with banks	5,704			5,704			5,704		—		—
Loans held-for-sale	7			7			—		7		—
Total loans, net of allowance for loan losses (a)	43,547			43,541			—		—		43,541
Customers’ liability on acceptances outstanding	8			8			8		—		—
Nonmarketable equity securities (b)	13			19			—		—		19
Restricted equity investments	133			133			133		—		—
Liabilities
Demand deposits (noninterest-bearing)	23,896			23,896			—		23,896		—
Interest-bearing deposits	23,833			23,833			—		23,833		—
Customer certificates of deposit	5,180			5,175			—		5,175		—
Total deposits	52,909			52,904			—		52,904		—
Short-term borrowings	226			226			226		—		—
Acceptances outstanding	8			8			8		—		—
Medium- and long-term debt	3,565			3,548			—		3,548		—
Credit-related financial instruments	(90		)	(90		)	—		—		(90		)
December 31, 2012
Assets
Cash and due from banks	$	1,395		$	1,395		$	1,395	$	—	$	—
Federal funds sold	100			100			100		—		—
Interest-bearing deposits with banks	3,039			3,039			3,039		—		—
Loans held-for-sale	12			12			—		12		—
Total loans, net of allowance for loan losses (a)	45,428			45,649			—		—		45,649
Customers’ liability on acceptances outstanding	18			18			18		—		—
Nonmarketable equity securities (b)	13			22			—		—		22
Restricted equity investments	174			174			174		—		—
Liabilities
Demand deposits (noninterest-bearing)	23,279			23,279			—		23,279		—
Interest-bearing deposits	23,381			23,381			—		23,381		—
Customer certificates of deposit	5,531			5,535			—		5,535		—
Total deposits	52,191			52,195			—		52,195		—
Short-term borrowings	110			110			110		—		—
Acceptances outstanding	18			18			18		—		—
Medium- and long-term debt	4,720			4,685			—		4,685		—
Credit-related financial instruments	(103		)	(103		)	—		—		(103		)

(a) Included $189 million and $214 million of impaired loans recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

(b) Included $1 million and $2 million of nonmarketable equity securities recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

14

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

NOTE 3 - INVESTMENT SECURITIES

A summary of the Corporation’s investment securities available-for-sale follows:

(in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
September 30, 2013
U.S. Treasury and other U.S. government agency securities	$	45	$	—	$	—	$	45
Residential mortgage-backed securities (a)	9,113		121		145		9,089
State and municipal securities	27		—		2		25
Corporate debt securities	57		—		—		57
Equity and other non-debt securities	279		1		8		272
Total investment securities available-for-sale (b)	$	9,521	$	122	$	155	$	9,488
December 31, 2012
U.S. Treasury and other U.S. government agency securities	$	35	$	—	$	—	$	35
Residential mortgage-backed securities (a)	9,672		248		—		9,920
State and municipal securities	27		—		4		23
Corporate debt securities	58		—		—		58
Equity and other non-debt securities	268		—		7		261
Total investment securities available-for-sale (b)	$	10,060	$	248	$	11	$	10,297

(a) Residential mortgage-backed securities 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 $176 million and $166 million, respectively, as of September 30, 2013 and $191 million and $180 million, respectively, as of December 31, 2012.

A summary of the Corporation’s investment securities available-for-sale in an unrealized loss position as of September 30, 2013 and December 31, 2012 follows:

	Temporarily Impaired
	Less than 12 Months				12 Months or more					Total
(in millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2013
Residential mortgage-backed securities (a)	$	5,167	$	145	$	—	$	—		$	5,167	$	145
State and municipal securities (b)	—		—		25		2			25		2
Corporate debt securities (b)	—		—		1		—		(c)	1		—		(c)
Equity and other non-debt securities (b)	—		—		141		8			141		8
Total impaired securities	$	5,167	$	145	$	167	$	10		$	5,334	$	155
December 31, 2012
State and municipal securities (b)	$	—	$	—	$	23	$	4		$	23	$	4
Corporate debt securities (b)	—		—		1		—		(c)	1		—		(c)
Equity and other non-debt securities (b)	—		—		156		7			156		7
Total impaired securities	$	—	$	—	$	180	$	11		$	180	$	11

(a) Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

(b) Auction-rate securities.

(c) Unrealized losses less than $0.5 million.

At September 30, 2013, the Corporation had 178 securities in an unrealized loss position with no credit impairment, including 105 residential mortgage-backed securities, 50 equity and other non-debt auction-rate preferred securities, 22 state and municipal auction-rate securities and one corporate auction-rate debt security. As of September 30, 2013, approximately 86 percent of the aggregate par value of auction-rate securities have been redeemed or sold since acquisition, of which approximately 95 percent were redeemed at or above cost. The unrealized losses for these securities resulted from changes in market interest rates and liquidity. The Corporation ultimately expects full collection of the carrying amount of these securities, does not intend to sell the securities in an unrealized loss position, and it is not more-likely-than-not that the Corporation will be required to sell the securities in an unrealized loss position prior to recovery of amortized cost. The Corporation does not consider these securities to be other-than-temporarily impaired at September 30, 2013.

15

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

Sales, calls and write-downs of investment securities available-for-sale resulted in the following gains and losses recorded in “net securities gains (losses)” on the consolidated statements of comprehensive income, computed based on the adjusted cost of the specific security.

	Nine Months Ended September 30,
(in millions)	2013			2012
Securities gains	$	1		$	12
Securities losses (a)	(2		)	(1		)
Net securities (losses) gains	$	(1	)	$	11

(a) Charges related to a derivative contract tied to the conversion rate of Visa Class B shares.

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)
September 30, 2013	Amortized Cost		Fair Value
Contractual maturity
Within one year	$	78	$	78
After one year through five years	263		268
After five years through ten years	97		96
After ten years	8,804		8,774
Subtotal	9,242		9,216
Equity and other non-debt securities	279		272
Total investment securities available-for-sale	$	9,521	$	9,488

Included in the contractual maturity distribution in the table above were auction-rate securities with a total amortized cost and fair value of $28 million and $26 million, respectively. Auction-rate securities are long-term, floating rate instruments for which interest rates are reset at periodic auctions. At each successful auction, the Corporation has the option to sell the security at par value. Additionally, the issuers of auction-rate securities generally have the right to redeem or refinance the debt. As a result, the expected life of auction-rate securities may differ significantly from the contractual life. Also included in the table above were residential mortgage-backed securities with total amortized cost and fair value of $9.1 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 September 30, 2013, investment securities with a carrying value of $2.9 billion were pledged where permitted or required by law to secure $2.0 billion of liabilities, primarily public and other deposits of state and local government agencies and derivative instruments.

16

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
(in millions)	30-59 Days		60-89  Days		90 Days or More		Total		Nonaccrual Loans		Current Loans (c)		Total  Loans
September 30, 2013
Business loans:
Commercial	$	46	$	33	$	12	$	91	$	107	$	27,699	$	27,897
Real estate construction:
Commercial Real Estate business line (a)	12		—		3		15		24		1,244		1,283
Other business lines (b)	2		—		—		2		1		266		269
Total real estate construction	14		—		3		17		25		1,510		1,552
Commercial mortgage:
Commercial Real Estate business line (a)	10		13		3		26		67		1,499		1,592
Other business lines (b)	18		9		—		27		139		7,027		7,193
Total commercial mortgage	28		22		3		53		206		8,526		8,785
Lease financing	—		—		—		—		—		829		829
International	2		—		—		2		—		1,284		1,286
Total business loans	90		55		18		163		338		39,848		40,349
Retail loans:
Residential mortgage	6		3		3		12		63		1,575		1,650
Consumer:
Home equity	9		2		—		11		34		1,456		1,501
Other consumer	7		2		4		13		2		636		651
Total consumer	16		4		4		24		36		2,092		2,152
Total retail loans	22		7		7		36		99		3,667		3,802
Total loans	$	112	$	62	$	25	$	199	$	437	$	43,515	$	44,151
December 31, 2012
Business loans:
Commercial	$	23	$	19	$	5	$	47	$	103	$	29,363	$	29,513
Real estate construction:
Commercial Real Estate business line (a)	—		—		—		—		30		1,019		1,049
Other business lines (b)	—		—		—		—		3		188		191
Total real estate construction	—		—		—		—		33		1,207		1,240
Commercial mortgage:
Commercial Real Estate business line (a)	20		4		—		24		94		1,755		1,873
Other business lines (b)	27		9		8		44		181		7,374		7,599
Total commercial mortgage	47		13		8		68		275		9,129		9,472
Lease financing	—		—		—		—		3		856		859
International	4		—		3		7		—		1,286		1,293
Total business loans	74		32		16		122		414		41,841		42,377
Retail loans:
Residential mortgage	27		6		2		35		70		1,422		1,527
Consumer:
Home equity	9		3		—		12		31		1,494		1,537
Other consumer	4		3		5		12		4		600		616
Total consumer	13		6		5		24		35		2,094		2,153
Total retail loans	40		12		7		59		105		3,516		3,680
Total loans	$	114	$	44	$	23	$	181	$	519	$	45,357	$	46,057

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

(c) Included purchased credit-impaired (PCI) loans with a total carrying value of $15 million and $36 million at September 30, 2013 and December 31, 2012, respectively.

17

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
(in millions)	Pass (a)		Special Mention (b)		Substandard (c)		Nonaccrual (d)		Total
September 30, 2013
Business loans:
Commercial	$	26,296	$	965	$	529	$	107	$	27,897
Real estate construction:
Commercial Real Estate business line (e)	1,231		13		15		24		1,283
Other business lines (f)	262		1		5		1		269
Total real estate construction	1,493		14		20		25		1,552
Commercial mortgage:
Commercial Real Estate business line (e)	1,357		107		61		67		1,592
Other business lines (f)	6,602		178		274		139		7,193
Total commercial mortgage	7,959		285		335		206		8,785
Lease financing	821		6		2		—		829
International	1,250		27		9		—		1,286
Total business loans	37,819		1,297		895		338		40,349
Retail loans:
Residential mortgage	1,576		4		7		63		1,650
Consumer:
Home equity	1,450		12		5		34		1,501
Other consumer	630		12		7		2		651
Total consumer	2,080		24		12		36		2,152
Total retail loans	3,656		28		19		99		3,802
Total loans	$	41,475	$	1,325	$	914	$	437	$	44,151
December 31, 2012
Business loans:
Commercial	$	28,032	$	820	$	558	$	103	$	29,513
Real estate construction:
Commercial Real Estate business line (e)	921		77		21		30		1,049
Other business lines (f)	176		3		9		3		191
Total real estate construction	1,097		80		30		33		1,240
Commercial mortgage:
Commercial Real Estate business line (e)	1,479		213		87		94		1,873
Other business lines (f)	6,783		258		377		181		7,599
Total commercial mortgage	8,262		471		464		275		9,472
Lease financing	840		9		7		3		859
International	1,230		57		6		—		1,293
Total business loans	39,461		1,437		1,065		414		42,377
Retail loans:
Residential mortgage	1,438		12		7		70		1,527
Consumer:
Home equity	1,489		11		6		31		1,537
Other consumer	581		22		9		4		616
Total consumer	2,070		33		15		35		2,153
Total retail loans	3,508		45		22		105		3,680
Total loans	$	42,969	$	1,482	$	1,087	$	519	$	46,057

(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. Included in the special mention category were $201 million and $303 million at September 30, 2013 and December 31, 2012, respectively, of loans proactively monitored by management that were considered “pass” 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. PCI loans are included in the substandard category. 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 - Summary of Significant Accounting Policies - on page F-59 in the Corporation's 2012 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.

18

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

The following table summarizes nonperforming assets.

(in millions)	September 30, 2013		December 31, 2012
Nonaccrual loans	$	437	$	519
Reduced-rate loans (a)	22		22
Total nonperforming loans	459		541
Foreclosed property	19		54
Total nonperforming assets	$	478	$	595

(a) Reduced-rate business loans totaled $5 million and $6 million at September 30, 2013 and December 31, 2012, and reduced-rate retail loans totaled $17 million and $16 million at September 30, 2013 and December 31, 2012.

Allowance for Credit Losses

The following table details the changes in the allowance for loan losses and related loan amounts.

	2013									2012
(in millions)	Business Loans			Retail Loans			Total			Business Loans			Retail Loans			Total
Three Months Ended September 30
Allowance for loan losses:
Balance at beginning of period	$	542		$	71		$	613		$	593		$	74		$	667
Loan charge-offs	(30		)	(9		)	(39		)	(47		)	(12		)	(59		)
Recoveries on loans previously charged-off	18			2			20			15			1			16
Net loan charge-offs	(12		)	(7		)	(19		)	(32		)	(11		)	(43		)
Provision for loan losses	5			5			10			15			8			23
Balance at end of period	$	535		$	69		$	604		$	576		$	71		$	647
Nine Months Ended September 30
Allowance for loan losses:
Balance at beginning of period	$	552		$	77		$	629		$	648		$	78		$	726
Loan charge-offs	(94		)	(18		)	(112		)	(158		)	(27		)	(185		)
Recoveries on loans previously charged-off	45			7			52			44			8			52
Net loan charge-offs	(49		)	(11		)	(60		)	(114		)	(19		)	(133		)
Provision for loan losses	32			3			35			42			12			54
Balance at end of period	$	535		$	69		$	604		$	576		$	71		$	647
As a percentage of total loans	1.32		%	1.83		%	1.37		%	1.42		%	1.94		%	1.46		%
September 30
Allowance for loan losses:
Individually evaluated for impairment	$	67		$	—		$	67		$	107		$	1		$	108
Collectively evaluated for impairment	468			69			537			469			70			539
Total allowance for loan losses	$	535		$	69		$	604		$	576		$	71		$	647
Loans:
Individually evaluated for impairment	$	294		$	52		$	346		$	537		$	54		$	591
Collectively evaluated for impairment	40,045			3,745			43,790			39,945			3,608			43,553
PCI loans (a)	10			5			15			43			7			50
Total loans evaluated for impairment	$	40,349		$	3,802		$	44,151		$	40,525		$	3,669		$	44,194

(a)    No allowance for loan losses was required for PCI loans at September 30, 2013 and 2012.

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 September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013		2012
Balance at beginning of period	$	36		$	36		$	32	$	26
Provision for credit losses on lending-related commitments	(2		)	(1		)	2		9
Balance at end of period	$	34		$	35		$	34	$	35

19

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:
(in millions)	Impaired Loans with No Related Allowance		Impaired Loans with Related Allowance		Total Impaired Loans		Unpaid Principal Balance		Related Allowance for Loan Losses
September 30, 2013
Business loans:
Commercial	$	10	$	85	$	95	$	173	$	28
Real estate construction:
Commercial Real Estate business line (a)	—		23		23		28		4
Other business lines (b)	—		—		—		1		—
Total real estate construction	—		23		23		29		4
Commercial mortgage:
Commercial Real Estate business line (a)	—		74		74		117		12
Other business lines (b)	2		100		102		137		23
Total commercial mortgage	2		174		176		254		35
Total business loans	12		282		294		456		67
Retail loans:
Residential mortgage	38		—		38		45		—
Consumer:
Home equity	10		—		10		16		—
Other consumer	4		—		4		11		—
Total consumer	14		—		14		27		—
Total retail loans (c)	52		—		52		72		—
Total individually evaluated impaired loans	$	64	$	282	$	346	$	528	$	67
December 31, 2012
Business loans:
Commercial	$	2	$	117	$	119	$	207	$	26
Real estate construction:
Commercial Real Estate business line (a)	—		26		26		31		4
Other business lines (b)	—		—		—		1		—
Total real estate construction	—		26		26		32		4
Commercial mortgage:
Commercial Real Estate business line (a)	—		99		99		159		18
Other business lines (b)	—		122		122		167		28
Total commercial mortgage	—		221		221		326		46
Lease financing	—		2		2		5		—
Total business loans	2		366		368		570		76
Retail loans:
Residential mortgage	39		—		39		48		—
Consumer:
Home equity	8		—		8		10		—
Other consumer	4		—		4		10		—
Total consumer	12		—		12		20		—
Total retail loans (c)	51		—		51		68		—
Total individually evaluated impaired loans	$	53	$	366	$	419	$	638	$	76

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

(c) Individually evaluated retail loans had no related allowance for loan losses, primarily due to policy changes which resulted in direct write-downs of restructured retail loans. 

20

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. Interest income recognized for the period primarily related to reduced-rate loans.

	Individually Evaluated Impaired Loans
	2013				2012
(in millions)	Average Balance for the Period		Interest Income Recognized for the Period		Average Balance for the Period		Interest Income Recognized for the Period
Three Months Ended September 30
Business loans:
Commercial	$	96	$	—	$	193	$	1
Real estate construction:
Commercial Real Estate business line (a)	24		—		48		—
Other business lines (b)	—		—		4		—
Total real estate construction	24		—		52		—
Commercial mortgage:
Commercial Real Estate business line (a)	78		—		135		—
Other business lines (b)	106		1		170		1
Total commercial mortgage	184		1		305		1
Lease financing	—		—		3		—
Total business loans	304		1		553		2
Retail loans:
Residential mortgage	35		—		40		—
Consumer loans:
Home equity	8		—		5		—
Other consumer	4		—		3		—
Total consumer	12		—		8		—
Total retail loans	47		—		48		—
Total individually evaluated impaired loans	$	351	$	1	$	601	$	2
Nine Months Ended September 30
Business loans:
Commercial	$	105	$	2	$	215	$	3
Real estate construction:
Commercial Real Estate business line (a)	25		—		66		—
Other business lines (b)	—		—		5		—
Total real estate construction	25		—		71		—
Commercial mortgage:
Commercial Real Estate business line (a)	87		—		149		—
Other business lines (b)	114		2		191		3
Total commercial mortgage	201		2		340		3
Lease financing	1		—		3		—
International	—		—		3		—
Total business loans	332		4		632		6
Retail loans:
Residential mortgage	36		—		42		—
Consumer:
Home equity	7		—		4		—
Other consumer	4		—		3		—
Total consumer	11		—		7		—
Total retail loans	47		—		49		—
Total individually evaluated impaired loans	$	379	$	4	$	681	$	6

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

21

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

Troubled Debt Restructurings

The following tables detail the recorded balance at September 30, 2013 and 2012 of loans considered to be TDRs that were restructured during the three- and nine-month periods ended September 30, 2013 and 2012, by type of modification. In cases of loans with more than one type of modification, the loans were categorized based on the most significant modification.

	2013									2012
	Type of Modification									Type of Modification
(in millions)	Principal Deferrals (a)			Interest Rate Reductions		AB Note Restructures (b)		Total Modifications		Principal Deferrals (a)			Interest Rate Reductions		AB Note Restructures (b)		Total Modifications
Three Months Ended September 30
Business loans:
Commercial	$	3		$	—	$	—	$	3	$	3		$	—	$	—	$	3
Commercial mortgage:
Commercial Real Estate business line (c)	14			—		—		14		8			—		19		27
Other business lines (d)	4			—		—		4		2			—		—		2
Total commercial mortgage	18			—		—		18		10			—		19		29
Total business loans	21			—		—		21		13			—		19		32
Retail loans:
Residential mortgage	—			1		—		1		8		(e)	—		—		8
Consumer:
Home equity	4		(e)	1		—		5		—			—		—		—
Other consumer	2		(e)	—		—		2		—			—		—		—
Total consumer	6			1		—		7		—			—		—		—
Total retail loans	6			2		—		8		8			—		—		8
Total loans	$	27		$	2	$	—	$	29	$	21		$	—	$	19	$	40
Nine Months Ended September 30
Business loans:
Commercial	$	13		$	—	$	8	$	21	$	17		$	1	$	—	$	18
Real estate construction:
Other business lines (d)	—			—		—		—		1			—		—		1
Total real estate construction	—			—		—		—		1			—		—		1
Commercial mortgage:
Commercial Real Estate business line (c)	33			—		—		33		23			—		22		45
Other business lines (d)	15			—		11		26		15			2		—		17
Total commercial mortgage	48			—		11		59		38			2		22		62
Total business loans	61			—		19		80		56			3		22		81
Retail loans:
Residential mortgage	1		(e)	2		—		3		8		(e)	1		—		9
Consumer:
Home equity	6		(e)	1		—		7		—			—		—		—
Other consumer	2		(e)	1		—		3		—			—		—		—
Total consumer	8			2		—		10		—			—		—		—
Total retail loans	9			4		—		13		8			1		—		9
Total loans	$	70		$	4	$	19	$	93	$	64		$	4	$	22	$	90

(a) Primarily represents loan balances where terms were extended 90 days or more at or above contractual interest rates.

(b) Loan restructurings whereby the original loan is restructured into two notes: an "A" note, which generally reflects the portion of the modified loan which is expected to be collected; and a "B" note, which is either fully charged off or exchanged for an equity interest.

(c) Primarily loans to real estate developers.

(d) Primarily loans secured by owner-occupied real estate.

(e) Includes bankruptcy loans for which the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt.

22

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

At September 30, 2013 and December 31, 2012, commitments to lend additional funds to borrowers whose terms have been modified in TDRs totaled $3 million and $5 million, respectively.

The majority of the modifications considered to be TDRs that occurred during the three- and nine-month periods ended September 30, 2013 and 2012 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 three- and nine-month periods ended September 30, 2013 and 2012 were insignificant.

On an ongoing basis, the Corporation monitors the performance of modified loans to their restructured terms. In the event of a subsequent default, the allowance for loan losses continues to be reassessed on the basis of an individual evaluation of the loan.

The following table presents information regarding the recorded balance at September 30, 2013 and 2012 of loans modified by principal deferral during the twelve months ended September 30, 2013 and 2012, and those principal deferrals which experienced a subsequent default during the three- and nine-month periods ended September 30, 2013 and 2012. 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.

	2013							2012
(in millions)	Balance at September 30			Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30		Balance at September 30			Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30
Principal deferrals:
Business loans:
Commercial	$	13		$	2	$	11	$	31		$	5	$	12
Real estate construction:
Commercial Real Estate business line (a)	1			—		—		1			—		1
Total real estate construction	1			—		—		1			—		1
Commercial mortgage:
Commercial Real Estate business line (a)	34			—		20		30			14		29
Other business lines (b)	20			2		11		27			2		9
Total commercial mortgage	54			2		31		57			16		38
Total business loans	68			4		42		89			21		51
Retail loans:
Residential mortgage	3		(c)	—		—		8		(c)	3		3
Consumer:
Home equity	7		(c)	—		—		—			—		—
Other consumer	3		(c)	—		—		—			—		—
Total consumer	10			—		—		—			—		—
Total retail loans	13			—		—		8			3		3
Total principal deferrals	$	81		$	4	$	42	$	97		$	24	$	54

(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.

23

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

The following table presents information regarding the recorded balance at September 30, 2013 and 2012 of loans modified by interest rate reduction during the twelve months ended September 30, 2013 and 2012, and those reduced-rate loans which experienced a subsequent default during the three- and nine-month periods ended September 30, 2013 and 2012. For reduced-rate loans, a subsequent payment default is defined in terms of delinquency, when a principal or interest payment is 90 days past due.

	2013						2012
(in millions)	Balance at September 30		Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30		Balance at September 30		Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30
Interest rate reductions:
Business loans:
Commercial	$	—	$	—	$	—	$	1	$	1	$	1
Commercial mortgage:
Other business lines (a)	—		—		—		14		—		12
Total commercial mortgage	—		—		—		14		—		12
Lease financing	—		—		—		3		—		—
Total business loans	—		—		—		18		1		13
Retail loans:
Residential mortgage	2		—		—		4		—		—
Consumer:
Home equity	1		—		—		—		—		—
Other consumer	1		—		—		—		—		—
Total consumer	2		—		—		—		—		—
Total retail loans	4		—		—		4		—		—
Total interest rate reductions	$	4	$	—	$	—	$	22	$	1	$	13

(a) Primarily loans secured by owner-occupied real estate.

During the twelve months ended September 30, 2013 and 2012 loans with a carrying value of $19 million and $29 million at September 30, 2013 and 2012, respectively, were restructured into two notes (AB note restructures). For AB note restructures, a subsequent payment default is defined in terms of delinquency, when a principal or interest payment is 90 days past due. There were no subsequent payment defaults of AB note restructures during both the three- and nine-month periods ended September 30, 2013 and 2012.

Purchased Credit-Impaired Loans

Acquired loans are initially recorded at fair value with no carryover of any allowance for loan losses.

Loans acquired with evidence of credit quality deterioration at acquisition for which it was probable that the Corporation would not be able to collect all contractual amounts due were accounted for as PCI loans. The Corporation aggregated the acquired PCI loans into pools of loans based on common risk characteristics.

The carrying amount of acquired PCI loans included in the consolidated balance sheet and the related outstanding balance at September 30, 2013 and December 31, 2012 were as follows. The outstanding balance represents the total amount owed as of September 30, 2013 and December 31, 2012, including accrued but unpaid interest and any amounts previously charged off. No allowance for loan losses was required on the acquired PCI loan pools at both September 30, 2013 and December 31, 2012.

(in millions)	September 30, 2013		December 31, 2012
Acquired PCI loans:
Carrying amount	$	15	$	36
Outstanding balance	99		138

Changes in the accretable yield for acquired PCI loans for the three- and nine-month periods ended September 30, 2013 and 2012 were as follows.

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Balance at beginning of period	$	10		$	16		$	16		$	25
Reclassifications from nonaccretable	4			—			4			—
Accretion	(3		)	(3		)	(9		)	(12		)
Balance at end of period	$	11		$	13		$	11		$	13

24

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

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. The Corporation presents derivative instruments at fair value in the consolidated balance sheets on a net basis when a right of offset exists, based on transactions with a single counterparty and any cash collateral paid to and/or received from that counterparty for derivative contracts that are subject to legally enforceable master netting arrangements. Market and credit risk are included in the determination of fair value.

Market risk is the potential loss that may result from movements in interest rates, foreign currency exchange rates or energy commodity prices that cause an unfavorable change in the value of a financial instrument. The Corporation manages this risk by establishing monetary exposure limits and monitoring compliance with those limits. Market risk inherent in interest rate and energy contracts entered into on behalf of customers is mitigated by taking offsetting positions, except in those circumstances when the amount, tenor and/or contract rate level results in negligible economic risk, whereby the cost of purchasing an offsetting contract is not economically justifiable. The Corporation mitigates most of the inherent market risk in foreign exchange contracts entered into on behalf of customers by taking offsetting positions and manages the remainder through individual foreign currency position limits and aggregate value-at-risk limits. These limits are established annually and reviewed quarterly. Market risk inherent in derivative instruments held or issued for risk management purposes is typically offset by changes in the fair value of the assets or liabilities being hedged.

Credit risk is the possible loss that may occur in the event of nonperformance by the counterparty to a financial instrument. The Corporation attempts to minimize credit risk arising from customer-initiated derivatives by evaluating the creditworthiness of each customer, adhering to the same credit approval process used for traditional lending activities and obtaining collateral as deemed necessary. For derivatives with dealer counterparties, the Corporation utilizes counterparty risk limits and monitoring procedures as well as master netting arrangements and bilateral collateral agreements to facilitate the management of credit risk. Master netting arrangements effectively reduce credit risk by permitting settlement of positive and negative positions and offset cash collateral held with the same counterparty on a net basis. Bilateral collateral agreements require daily exchange of cash or highly rated securities issued by the U.S. Treasury or other U.S. government entities to collateralize amounts due to either party beyond certain risk limits. At September 30, 2013, counterparties with bilateral collateral agreements had pledged $141 million of marketable investment securities and deposited $1 million of cash with the Corporation to secure the fair value of contracts in an unrealized gain position, and the Corporation had pledged $22 million of investment securities and posted $8 million of cash as collateral for contracts in an unrealized loss position. For those counterparties not covered under bilateral collateral agreements, collateral is obtained, if deemed necessary, based on the results of management’s credit evaluation of the counterparty. Collateral varies, but may include cash, investment securities, accounts receivable, equipment or real estate. Included in the fair value of derivative instruments are credit valuation adjustments reflecting counterparty credit risk. These adjustments are determined by applying a credit spread for the counterparty or the Corporation, as appropriate, to the total expected exposure of the derivative.

The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position on September 30, 2013 was $13 million, for which the Corporation had pledged collateral of $8 million in the normal course of business. The credit-risk-related contingent features require the Corporation’s debt to maintain an investment grade credit rating from each of the major credit rating agencies. If the Corporation’s debt were to fall below investment grade, the counterparties to the derivative instruments could require additional overnight collateral on derivative instruments in net liability positions. If the credit-risk-related contingent features underlying these agreements had been triggered on September 30, 2013, the Corporation would have been required to assign an additional $5 million of collateral to its counterparties.

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

25

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

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.

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 September 30, 2013 and December 31, 2012. The table excludes commitments, warrants accounted for as derivatives and a derivative related to the Corporation’s 2008 sale of its remaining ownership of Visa shares.

	September 30, 2013								December 31, 2012
			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
Risk management purposes
Derivatives designated as hedging instruments
Interest rate contracts:
Swaps - fair value - receive fixed/pay floating	$	1,450	$	221		$	—		$	1,450	$	290		$	—
Derivatives used as economic hedges
Foreign exchange contracts:
Spot, forwards and swaps	316		3			—			475		1			—
Total risk management purposes	1,766		224			—			1,925		291			—
Customer-initiated and other activities
Interest rate contracts:
Caps and floors written	544		—			3			545		—			3
Caps and floors purchased	544		3			—			545		3			—
Swaps	11,072		192			144			10,952		263			215
Total interest rate contracts	12,160		195			147			12,042		266			218
Energy contracts:
Caps and floors written	1,642		1			75			1,873		—			112
Caps and floors purchased	1,642		75			1			1,873		112			—
Swaps	2,439		52			50			1,815		61			60
Total energy contracts	5,723		128			126			5,561		173			172
Foreign exchange contracts:
Spot, forwards, options and swaps	1,798		16			13			2,253		20			18
Total customer-initiated and other activities	19,681		339			286			19,856		459			408
Total gross derivatives	$	21,447	563			286			$	21,781	750			408
Amounts offset in the consolidated balance sheets:
Netting adjustment - Offsetting derivative assets/liabilities			(227		)	(227		)			(279		)	(279		)
Netting adjustment - Cash collateral received/posted			(1		)	(8		)			(11		)	—
Net derivatives included in the consolidated balance sheets (b)			335			51					460			129
Amounts not offset in the consolidated balance sheets:
Marketable securities pledged under bilateral collateral agreements			(141		)	(12		)			(180		)	(56		)
Net derivatives after deducting amounts not offset in the consolidated balance sheets			$	194		$	39				$	280		$	73

(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 totaled $2 million and $4 million at September 30, 2013 and December 31, 2012, respectively.

26

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

Risk Management

As an end-user, the Corporation employs a variety of financial instruments for risk management purposes, including cash instruments, such as investment securities, as well as derivative instruments. Activity related to these instruments is centered predominantly in the interest rate markets and mainly involves interest rate swaps. Various other types of instruments also may be used to manage exposures to market risks, including interest rate caps and floors, total return swaps, foreign exchange forward contracts and foreign exchange swap agreements.

As part of a fair value hedging strategy, the Corporation entered into interest rate swap agreements for interest rate risk management purposes. These interest rate swap agreements effectively modify the Corporation’s exposure to interest rate risk by converting fixed-rate debt to a floating rate. These agreements involve the receipt of fixed-rate interest amounts in exchange for floating-rate interest payments over the life of the agreement, without an exchange of the underlying principal amount. Risk management fair value interest rate swaps generated net interest income of $18 million and $54 million for the three- and nine-month periods ended September 30, 2013, respectively, compared to $17 million and $51 million for the three- and nine-month periods ended September 30, 2012, respectively. The Corporation recognized an insignificant amount of net gains (losses) in "other noninterest income" in the consolidated statements of comprehensive income for the ineffective portion of risk management derivative instruments designated as fair value hedges of fixed-rate debt for both the three- and nine-month periods ended September 30, 2013 and 2012.

Foreign exchange rate risk arises from changes in the value of certain assets and liabilities denominated in foreign currencies. The Corporation employs spot and forward contracts in addition to swap contracts to manage exposure to these and other risks.

The Corporation recognized an insignificant amount of net gains on risk management derivative instruments used as economic hedges in "other noninterest income" in the consolidated statements of comprehensive income for both the three- and nine-month periods ended September 30, 2013 and 2012.

The following table summarizes the expected weighted average remaining maturity of the notional amount of risk management interest rate swaps and the weighted average interest rates associated with amounts expected to be received or paid on interest rate swap agreements as of September 30, 2013 and December 31, 2012.

			Weighted Average
(dollar amounts in millions)	Notional Amount		Remaining Maturity (in years)	Receive Rate		Pay Rate (a)
September 30, 2013
Swaps - fair value - receive fixed/pay floating rate
Medium- and long-term debt designation	$	1,450	3.7	5.45	%	0.42	%
December 31, 2012
Swaps - fair value - receive fixed/pay floating rate
Medium- and long-term debt designation	1,450		4.4	5.45		0.62

(a) Variable rates paid on receive fixed swaps are based on six-month LIBOR rates in effect at September 30, 2013 and December 31, 2012.

Management believes these hedging strategies achieve the desired relationship between the rate maturities of assets and funding sources which, in turn, reduce the overall exposure of net interest income to interest rate risk, although there can be no assurance that such strategies will be successful.

Customer-Initiated and Other

The Corporation enters into derivative transactions at the request of customers and generally takes offsetting positions with dealer counterparties to mitigate the inherent market risk. Income primarily results from the spread between the customer derivative and the offsetting dealer position.

For customer-initiated foreign exchange contracts where offsetting positions have not been taken, the Corporation manages the remaining inherent market risk through individual foreign currency position limits and aggregate value-at-risk limits. These limits are established annually and reviewed quarterly. For those customer-initiated derivative contracts which were not offset or where the Corporation holds a speculative position within the limits described above, the Corporation recognized an insignificant amount of net gains in “other noninterest income” in the consolidated statements of comprehensive income for both the three- and nine-month periods ended September 30, 2013 and 2012.

27

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 September 30,				Nine Months Ended September 30,
(in millions)	Location of Gain	2013		2012		2013		2012
Interest rate contracts	Other noninterest income	$	8	$	5	$	17	$	14
Energy contracts	Other noninterest income	—		1		2		3
Foreign exchange contracts	Foreign exchange income	8		8		26		26
Total		$	16	$	14	$	45	$	43

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)	September 30, 2013		December 31, 2012
Unused commitments to extend credit:
Commercial and other	$	27,975	$	25,659
Bankcard, revolving check credit and home equity loan commitments	1,824		1,681
Total unused commitments to extend credit	$	29,799	$	27,340
Standby letters of credit	$	4,484	$	4,985
Commercial letters of credit	96		78
Other credit-related financial instruments	2		1

The Corporation maintains an allowance to cover probable credit losses inherent in lending-related commitments, including unused commitments to extend credit, letters of credit and financial guarantees. At September 30, 2013 and December 31, 2012, 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 $32 million, respectively. In 2011, the Corporation recorded a purchase discount for acquired lending-related commitments. An allowance for credit losses will be recorded on acquired lending-related commitments only to the extent that the required allowance exceeds the remaining purchase discount. At both September 30, 2013 and December 31, 2012, no allowance was recorded for acquired lending-related commitments, and $1 million and $2 million of purchase discount remained at each respective period.

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 $19 million at both September 30, 2013 and December 31, 2012 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 2022. 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 $307 million and $325 million, respectively, of the $4.6 billion and $5.1 billion standby and commercial letters of credit outstanding at September 30, 2013 and December 31, 2012, 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 $67 million at September 30, 2013, including $55 million in deferred

28

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

fees and $12 million in the allowance for credit losses on lending-related commitments. At December 31, 2012, the comparable amounts were $82 million, $69 million and $13 million, respectively.

The following table presents a summary of internally classified watch list standby and commercial letters of credit at September 30, 2013 and December 31, 2012. The Corporation's internal watch 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.

(dollar amounts in millions)	September 30, 2013			December 31, 2012
Total watch list standby and commercial letters of credit	$	76		$	144
As a percentage of total outstanding standby and commercial letters of credit	1.7		%	2.9		%

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 September 30, 2013 and December 31, 2012, the total notional amount of the credit risk participation agreements was approximately $661 million and $574 million, respectively, and the fair value, included in customer-initiated interest rate contracts recorded in "accrued expenses and other liabilities" on the consolidated balance sheets, was insignificant for each period. The maximum estimated exposure to these agreements, as measured by projecting a maximum value of the guaranteed derivative instruments, assuming 100 percent default by all obligors on the maximum values, was approximately $8 million and $11 million at September 30, 2013 and December 31, 2012, 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 September 30, 2013, the weighted average remaining maturity of outstanding credit risk participation agreements was 2.8 years.

In 2008, the Corporation sold its remaining ownership of Visa Class B shares and entered into a derivative contract. Under the terms of the derivative contract, the Corporation will compensate the counterparty primarily for dilutive adjustments made to the conversion factor of the Visa Class B shares to Class A shares based on the ultimate outcome of litigation involving Visa. Conversely, the Corporation will be compensated by the counterparty for any increase in the conversion factor from anti-dilutive adjustments. The notional amount of the derivative contract was equivalent to approximately 780,000 Visa Class B shares. The fair value of the derivative liability, included in "accrued expenses and other liabilities" on the consolidated balance sheets, was $2 million at September 30, 2013 and $1 million at December 31, 2012.

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 following provides a summary of the VIEs in which the Corporation has an interest.

The Corporation holds ownership interests in funds in the form of limited partnerships or limited liability companies (LLCs) investing in low income housing projects. The Corporation also directly invests in limited partnerships and LLCs which invest in community development projects which generate similar tax credits to investors. 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. While the partnership/LLC agreements allow the limited partners/investor members, through a majority vote, to remove the general partner/managing member, this right is not deemed to be substantive as the general partner/managing member can only be removed for cause.

The Corporation accounts for its interest in these entities on either the cost or equity method. Exposure to loss as a result of the Corporation’s involvement with these entities at September 30, 2013 was limited to approximately $386 million, which reflected the carrying value of the Corporation's investment and unfunded commitments for future investments.

As an investor, the Corporation obtains income tax credits and deductions from the operating losses of these tax credit entities. The income tax credits and deductions are allocated to the investors based on their ownership percentages and are recorded

29

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

as a reduction of income tax expense (or an increase to income tax benefit) and a reduction of federal income taxes payable. Investment balances, including all legally binding commitments to fund future investments, are included in “accrued income and other assets” on the consolidated balance sheets, with amortization and other write-downs of investments recorded in “other noninterest income” on the consolidated statements of comprehensive income. In addition, 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 ($135 million at September 30, 2013).

The Corporation provided no financial or other support that was not contractually required to any of the above VIEs during the nine months ended September 30, 2013 and 2012.

The following table summarizes the impact of these VIEs on line items on the Corporation’s consolidated statements of comprehensive income.

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Other noninterest income	$	(14	)	$	(15	)	$	(41	)	$	(43	)
Benefit for income taxes (a)	(15		)	(14		)	(43		)	(41		)

(a) Income tax credits from low income housing tax credit/historic rehabilitation tax credit partnerships.

For further information on the Corporation’s consolidation policy, see Note 1 to the consolidated financial statements in the Corporation's 2012 Annual Report.

NOTE 7 - MEDIUM- AND LONG-TERM DEBT

Medium- and long-term debt is summarized as follows:

(in millions)	September 30, 2013		December 31, 2012
Parent company
Subordinated notes:
4.80% subordinated notes due 2015	$	321	$	330
Medium-term notes:
3.00% notes due 2015	299		299
Total parent company	620		629
Subsidiaries
Subordinated notes:
7.375% subordinated notes due 2013	—		51
5.70% subordinated notes due 2014	258		267
5.75% subordinated notes due 2016	684		694
5.20% subordinated notes due 2017	571		593
Floating-rate based on LIBOR index subordinated note due 2013	—		26
8.375% subordinated notes due 2024	184		186
7.875% subordinated notes due 2026	220		241
Total subordinated notes	1,917		2,058
Federal Home Loan Bank advances:
Floating-rate based on LIBOR indices due 2013 to 2014	1,000		2,000
Other notes:
6.0% - 6.4% fixed-rate notes due 2020	28		33
Total subsidiaries	2,945		4,091
Total medium- and long-term debt	$	3,565	$	4,720

The carrying value of medium- and long-term debt has been adjusted to reflect the gain or loss attributable to the risk hedged with interest rate swaps.

Subordinated notes with remaining maturities greater than one year qualify as Tier 2 capital.

Comerica Bank (the Bank) is a member of the FHLB, which provides short- and long-term funding collateralized by mortgage-related assets to its members. FHLB advances bear interest at variable rates based on LIBOR and were secured by a blanket lien on $13 billion of real estate-related loans at September 30, 2013.

30

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

In the third quarter 2013, the Bank exercised its option to redeem, at par, a $25 million floating-rate subordinated note which had an original maturity date of 2018, and recognized a pretax gain of $1 million, included in "other noninterest expenses" in the consolidated statements of income.

NOTE 8 - ACCUMULATED OTHER COMPREHENSIVE INCOME (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 nine months ended September 30, 2013 and 2012, including the amount of income tax expense (benefit) allocated to each component of other comprehensive income (loss).

	Nine Months Ended September 30,
(in millions)	2013			2012
Accumulated net unrealized (losses) gains on investment securities available-for-sale:
Balance at beginning of period, net of tax	$	150		$	129
Net unrealized holding (losses) gains arising during the period	(270		)	123
Less: Provision (benefit) for income taxes	(100		)	44
Net unrealized holding (losses) gains arising during the period, net of tax	(170		)	79
Less:
Net realized gains included in net securities gains (losses)	1			12
Less: Provision for income taxes	—			4
Reclassification adjustment for net securities gains included in net income, net of tax	1			8
Change in net unrealized (losses) gains on investment securities available-for-sale, net of tax	(171		)	71
Balance at end of period, net of tax	$	(21	)	$	200
Accumulated defined benefit pension and other postretirement plans adjustment:
Balance at beginning of period, net of tax	$	(563	)	$	(485	)
Net defined benefit pension and other postretirement adjustment arising during the period, net of tax	—			—
Less:
Amortization of actuarial net loss	(65		)	(46		)
Amortization of prior service cost	(2		)	(2		)
Amortization of transition obligation	—			(3		)
Amounts recognized in employee benefits expense	(67		)	(51		)
Less: Benefit for income taxes	(24		)	(19		)
Adjustment for amounts recognized as components of net periodic benefit cost during the period, net of tax	(43		)	(32		)
Change in defined benefit pension and other postretirement plans adjustment, net of tax	43			32
Balance at end of period, net of tax	$	(520	)	$	(453	)
Total accumulated other comprehensive loss at end of period, net of tax	$	(541	)	$	(253	)

31

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 September 30,				Nine Months Ended September 30,
(in millions, except per share data)	2013		2012		2013		2012
Basic and diluted
Net income	$	147	$	117	$	424	$	391
Less:
Income allocated to participating securities	2		1		6		4
Net income attributable to common shares	$	145	$	116	$	418	$	387
Basic average common shares	182		190		184		193
Basic net income per common share	$	0.80	$	0.61	$	2.28	$	2.00
Basic average common shares	182		190		184		193
Dilutive common stock equivalents:
Net effect of the assumed exercise of stock options	1		—		1		—
Net effect of the assumed exercise of warrants	4		1		2		1
Diluted average common shares	187		191		187		194
Diluted net income per common share	$	0.78	$	0.61	$	2.23	$	2.00

The following average shares related to outstanding options and warrants to purchase shares of common stock were not included in the computation of diluted net income per common share because the prices of the options and warrants were greater than the average market price of common shares for the period.

	Three Months Ended September 30,		Nine Months Ended September 30,
(shares in millions)	2013	2012	2013	2012
Average outstanding options	8.2	15.2	11.8	16.2
Range of exercise prices	$41.70 - $61.94	$31.51 - $61.94	$34.78 - $61.94	$30.77 - $64.50
Average outstanding warrants				0.2
Exercise price				$30.36

NOTE 10 - EMPLOYEE BENEFIT PLANS

Net periodic benefit costs are charged to "employee benefits expense" on the consolidated statements of comprehensive income. The components of net periodic benefit cost for the Corporation's qualified pension plan, non-qualified pension plan and postretirement benefit plan are as follows.

Qualified Defined Benefit Pension Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Service cost	$	9		$	9		$	28		$	25
Interest cost	20			19			59			59
Expected return on plan assets	(33		)	(29		)	(99		)	(85		)
Amortization of prior service cost	1			1			3			3
Amortization of net loss	18			14			56			40
Net periodic defined benefit cost	$	15		$	14		$	47		$	42

Non-Qualified Defined Benefit Pension Plan	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2013		2012		2013			2012
Service cost	$	1	$	1	$	3		$	3
Interest cost	2		2		7			7
Amortization of prior service cost	—		—		(1		)	(1		)
Amortization of net loss	3		1		8			5
Net periodic defined benefit cost	$	6	$	4	$	17		$	14

32

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

Postretirement Benefit Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Interest cost	$	1		$	1		$	3		$	3
Expected return on plan assets	(1		)	(1		)	(3		)	(3		)
Amortization of transition obligation	—			1			—			3
Amortization of net loss	—			—			1			1
Net periodic postretirement benefit cost	$	—		$	1		$	1		$	4

For further information on the Corporation's employee benefit plans, refer to Note 17 to the consolidated financial statements in the Corporation's 2012 Annual Report.

NOTE 11 - INCOME TAXES AND TAX-RELATED ITEMS

At September 30, 2013, net unrecognized tax benefits were $13 million, compared to $42 million at December 31, 2012. The decrease in unrecognized tax benefits of $29 million was primarily the result of the recognition of federal settlements. The Corporation anticipates that there will be no change in net unrecognized tax benefits within the next twelve months. Included in "accrued expense and other liabilities" on the consolidated balance sheets was a $2 million liability for tax-related interest and penalties at September 30, 2013, compared to $4 million at December 31, 2012. The $2 million decrease was primarily a result of settlements with tax authorities.

Net deferred tax assets were $329 million at September 30, 2013, compared to $254 million at December 31, 2012. The increase of $75 million in net deferred tax assets resulted primarily from a decrease in unrealized gains on investment securities available-for-sale recognized in other comprehensive income, partially offset by the utilization of tax credits. Deferred tax assets were evaluated for realization and it was determined that no valuation allowance was needed at both September 30, 2013 and December 31, 2012. This conclusion was based on available evidence of loss carryback capacity, projected future reversals of existing taxable temporary differences and assumptions made regarding future events.

In the ordinary course of business, the Corporation enters into certain transactions that have tax consequences. From time to time, the Internal Revenue Service (IRS) may review and/or challenge specific interpretive tax positions taken by the Corporation with respect to those transactions. The Corporation believes that its tax returns were filed based upon applicable statutes, regulations and case law in effect at the time of the transactions. The IRS, an administrative authority or a court, if presented with the transactions, could disagree with the Corporation’s interpretation of the tax law.

Based on current knowledge and probability assessment of various potential outcomes, the Corporation believes that current tax reserves are adequate, and the amount of any potential incremental liability arising is not expected to have a material adverse effect on the Corporation’s consolidated financial condition or results of operations. Probabilities and outcomes are reviewed as events unfold, and adjustments to the reserves are made when necessary.

NOTE 12 - CONTINGENT LIABILITIES

Legal Proceedings

The Corporation and certain of its subsidiaries are subject to various 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 currently outstanding legal proceedings and, with respect to such legal proceedings, intends to continue to defend itself vigorously, litigating or settling cases according to management’s judgment as to what is in the best interests of the Corporation and its shareholders. Settlement may result from the Corporation's determination that it may be more prudent financially to settle, rather than litigate, and should not be regarded as an admission of liability. On at least a quarterly basis, the Corporation assesses its potential liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. On a case-by-case basis, reserves are established for those legal claims for which it is probable that a loss will be incurred either as a result of a settlement or judgment, and the amount of such loss can be reasonably estimated. The actual costs of resolving these claims may be substantially higher or lower than the amounts reserved. Litigation-related expenses, included in "other noninterest expenses" on the consolidated statements of comprehensive income, were a benefit of $4 million for the three months ended September 30, 2013, compared to expense of $4 million for the same period in 2012. There were no litigation-related expenses for the nine months ended September 30, 2013, compared to $23 million for the nine months ended September 30, 2012. Legal fees, also included in “other noninterest expenses” on the consolidated statements of comprehensive income, totaled $5 million and $8 million for the three-month periods ended September 30, 2013 and 2012, respectively, and $19 million and $26 million for the nine-month periods ended September 30, 2013 and 2012, respectively. Based on current knowledge, and after consultation with legal counsel, management believes that current reserves are adequate, and the amount of any incremental liability arising from these matters is not expected to have a material adverse effect on the Corporation’s consolidated financial condition, consolidated results of operations or consolidated cash flows.

33

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

For other matters, where a loss is not probable, the Corporation has not established legal reserves. In determining whether it is possible to provide an estimate of loss or range of possible loss, the Corporation reviews and evaluates its material litigation on an ongoing basis, in conjunction with legal counsel, in light of potentially relevant factual and legal developments. Based on current knowledge, expectation of future earnings, and after consultation with legal counsel, management believes the maximum amount of reasonably possible losses would not have a material adverse effect on the Corporation's consolidated financial condition, consolidated results of operations or consolidated cash flows.

 The damages alleged by plaintiffs or claimants may be overstated, unsubstantiated by legal theory, unsupported by the facts, and/or bear no relation to the ultimate award that a court, jury or agency might impose. In view of the inherent difficulty of predicting the outcome of such matters, the Corporation cannot state with confidence a range of reasonably possible losses, nor what the eventual outcome of these matters will be. However, based on current knowledge and after consultation with legal counsel, management believes the maximum amount of reasonably possible losses would not have a material adverse effect on the Corporation’s consolidated financial condition, consolidated results of operations or consolidated cash flows.

In the event of unexpected future developments, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the Corporation's consolidated financial condition, consolidated results of operations or consolidated cash flows.

For information regarding income tax contingencies, refer to Note 11.

NOTE 13 - 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. These methodologies may be modified as the management accounting system is enhanced and changes occur in the organizational structure and/or product lines.

In the first quarter 2013, the Corporation changed the method of assigning the allowance for loan losses to each business segment. In 2012, national probability of default and loss given default statistics were incorporated into the Corporation's allowance methodology. Each business segment was assigned an allowance for loan losses based on market-specific standard reserve factors applied to the loans in each segment, and the difference between the total allowance required on a national basis and the market-specific allowances was allocated based on the relative loan balances in each segment. Effective first quarter 2013, each segment is assigned an allowance for loan losses by applying national standard reserve factors to the loan balances in each segment by risk rating distribution. For comparability purposes, amounts in all periods are based on business segments and methodologies in effect at September 30, 2013. Also in the first quarter 2013, the Corporation changed the method of allocating to the segments certain noninterest income and expense associated with commercial charge cards. The change did not have a material impact on segment operating results.

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 middle market businesses, multinational corporations and governmental entities by offering various products and services, including commercial loans and lines of credit, deposits, cash management, capital market products, international trade finance, letters of credit, foreign exchange management services and loan syndication services.

The Retail Bank includes small business banking and personal financial services, consisting of consumer lending, consumer deposit gathering and mortgage loan origination. In addition to a full range of financial services provided to small business customers, this business segment offers a variety of consumer products, including deposit accounts, installment loans, credit cards, student loans, home equity lines of credit and residential mortgage loans.

Wealth Management offers products and services consisting of fiduciary services, private banking, retirement services, investment management and advisory services, investment banking and brokerage services. This business segment also offers the sale of annuity products, as well as life, disability and long-term care insurance products.

34

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 discontinued operations, 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 Note 22 to the consolidated financial statements in the Corporation's 2012 Annual Report.

Business segment financial results are as follows:

(dollar amounts in millions)	Business Bank			Retail Bank			Wealth Management			Finance			Other			Total
Nine Months Ended September 30, 2013
Earnings summary:
Net interest income (expense) (FTE)	$	1,115		$	460		$	138		$	(492	)	$	23		$	1,244
Provision for credit losses	29			21			(8		)	—			(5		)	37
Noninterest income	246			132			191			47			6			622
Noninterest expenses	446			530			238			7			28			1,249
Provision (benefit) for income taxes (FTE)	271			14			35			(168		)	4			156
Net income (loss)	$	615		$	27		$	64		$	(284	)	$	2		$	424
Net credit-related charge-offs	$	37		$	18		$	5		$	—		$	—		$	60
Selected average balances:
Assets	$	35,697		$	5,967		$	4,785		$	11,553		$	5,708		$	63,710
Loans	34,626			5,278			4,629			—			—			44,533
Deposits	25,931			21,183			3,722			309			210			51,355
Statistical data:
Return on average assets (a)	2.30		%	0.17		%	1.78		%	N/M			N/M			0.89		%
Efficiency ratio (b)	32.74			89.19			72.64			N/M			N/M			66.89

(dollar amounts in millions)	Business Bank			Retail Bank			Wealth Management			Finance			Other			Total
Nine Months Ended September 30, 2012
Earnings summary:
Net interest income (expense) (FTE)	$	1,131		$	491		$	140		$	(483	)	$	27		$	1,306
Provision for credit losses	28			16			18			—			1			63
Noninterest income	240			131			193			44			6			614
Noninterest expenses	453			543			236			8			90			1,330
Provision (benefit) for income taxes (FTE)	273			21			28			(167		)	(19		)	136
Net income (loss)	$	617		$	42		$	51		$	(280	)	$	(39	)	$	391
Net credit-related charge-offs	$	81		$	34		$	18		$	—		$	—		$	133
Selected average balances:
Assets	$	34,140		$	6,027		$	4,602		$	11,796		$	5,443		$	62,008
Loans	33,183			5,326			4,525			—			—			43,034
Deposits	24,430			20,527			3,640			171			179			48,947
Statistical data:
Return on average assets (a)	2.41		%	0.26		%	1.49		%	N/M			N/M			0.84		%
Efficiency ratio (b)	33.08			87.14			73.30			N/M			N/M			69.62

(a) Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

(b)    Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains.

FTE – Fully Taxable Equivalent

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

35

Notes to Consolidated Financial Statements (unaudited)

Comerica Incorporated and Subsidiaries

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 September 30, 2013.

A discussion of the financial results and the factors impacting performance can be found in the section entitled "Market Segments" in the financial review.

Market segment financial results are as follows:

(dollar amounts in millions)	Michigan			California			Texas			Other Markets			Finance & Other			Total
Nine Months Ended September 30, 2013
Earnings summary:
Net interest income (expense) (FTE)	$	564		$	516		$	394		$	239		$	(469	)	$	1,244
Provision for credit losses	(19		)	25			31			5			(5		)	37
Noninterest income	268			113			100			88			53			622
Noninterest expenses	496			298			272			148			35			1,249
Provision (benefit) for income taxes (FTE)	126			114			67			13			(164		)	156
Net income (loss)	$	229		$	192		$	124		$	161		$	(282	)	$	424
Net credit-related charge-offs	$	10		$	30		$	7		$	13		$	—		$	60
Selected average balances:
Assets	$	13,936		$	14,067		$	10,774		$	7,672		$	17,261		$	63,710
Loans	13,508			13,820			10,064			7,141			—			44,533
Deposits	20,294			14,532			10,149			5,861			519			51,355
Statistical data:
Return on average assets (a)	1.44		%	1.65		%	1.46		%	2.79		%	N/M			0.89		%
Efficiency ratio (b)	59.52			47.38			54.96			45.30			N/M			66.89

(dollar amounts in millions)	Michigan			California			Texas			Other Markets			Finance & Other			Total
Nine Months Ended September 30, 2012
Earnings summary:
Net interest income (expense) (FTE)	$	585		$	514		$	429		$	234		$	(456	)	$	1,306
Provision for credit losses	(7		)	9			43			17			1			63
Noninterest income	289			101			93			81			50			614
Noninterest expenses	527			294			271			140			98			1,330
Provision (benefit) for income taxes (FTE)	123			115			73			11			(186		)	136
Net income (loss)	$	231		$	197		$	135		$	147		$	(319	)	$	391
Net credit-related charge-offs	$	40		$	34		$	17		$	42		$	—		$	133
Selected average balances:
Assets	$	13,968		$	12,786		$	10,224		$	7,791		$	17,239		$	62,008
Loans	13,687			12,555			9,462			7,330			—			43,034
Deposits	19,423			14,270			10,118			4,786			350			48,947
Statistical data:
Return on average assets (a)	1.51		%	1.72		%	1.58		%	2.51		%	N/M			0.84		%
Efficiency ratio (b)	60.29			47.86			51.78			46.05			N/M			69.62

(a) Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

(b)    Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains.

FTE – Fully Taxable Equivalent

N/M – not meaningful

36

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 course," "trend," "objective," "looks forward" 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, and forecasts of the Corporation's revenue, earnings or other measures of economic performance, including statements of profitability, business segments and subsidiaries, 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, including the interest rate policies of the Federal Reserve Board; volatility and disruptions in global capital and credit markets; changes in the Corporation's credit rating; the interdependence of financial service companies; changes in regulation or oversight; unfavorable developments concerning credit quality; any future acquisitions or divestitures; the effects of more stringent capital or liquidity requirements; declines or other changes in the businesses or industries of the Corporation's customers; the implementation of the Corporation's strategies and business models; the Corporation's ability to utilize technology to efficiently and effectively develop, market and deliver new products and services; operational difficulties, failure of technology infrastructure or information security incidents; changes in the financial markets, including fluctuations in interest rates and their impact on deposit pricing; competitive product and pricing pressures among financial institutions within the Corporation's markets; changes in customer behavior; management's ability to maintain and expand customer relationships; management's ability to retain key officers and employees; the impact of legal and regulatory proceedings or determinations; the effectiveness of methods of reducing risk exposures; the effects of terrorist activities and other hostilities; the effects of catastrophic events including, but not limited to, hurricanes, tornadoes, earthquakes, fires, droughts and floods; changes in accounting standards and the critical nature of the Corporation's accounting policies. The Corporation cautions that the foregoing list of factors is not exclusive. 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 13 of the Corporation's Annual Report on Form 10-K for the year ended December 31, 2012 and "Item 1A. Risk Factors" beginning on page 68 of the Corporation's Quarterly Report on Form 10-Q for the quarter ended June 30, 2013. 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.

37

RESULTS OF OPERATIONS

Net income for the three months ended September 30, 2013 was $147 million, an increase of $30 million from $117 million reported for the three months ended September 30, 2012. The increase in net income in the three months ended September 30, 2013, compared to the same period in 2012, reflected an increase of $17 million in noninterest income and decreases of $32 million in noninterest expenses and $14 million in the provision for credit losses, partially offset by a decrease of $15 million in net interest income and an increase of $18 million in the provision for income taxes. Net income per diluted common share was $0.78 for the three months ended September 30, 2013, compared to $0.61 for the same period one year ago. Average diluted common shares were 187 million for the three months ended September 30, 2013, compared to 191 million for the same period in the prior year.

Net income for the nine months ended September 30, 2013 was $424 million, an increase of $33 million from $391 million for the nine months ended September 30, 2012. The increase in net income in the nine months ended September 30, 2013, compared to the same period in 2012, reflected an $8 million increase in noninterest income and decreases of $81 million in noninterest expenses and $26 million in the provision for credit losses, partially offset by a decrease of $62 million in net interest income and an increase of $20 million in the provision for income taxes. Net income per diluted common share was $2.23 for the nine months ended September 30, 2013, compared to $2.00 for the same period one year ago. Average diluted common shares were 187 million for the nine months ended September 30, 2013, compared to 194 million for the same period in the prior year.

Full-Year and Fourth Quarter 2013 Outlook

Management expectations for full-year 2013 compared to full-year 2012 have not changed from the previously provided outlook, with the exception of customer-driven fees, which are expected to be modestly higher based on strong third quarter results.

For fourth quarter 2013, management expects the following, assuming a continuation of the current slow growing economic environment:

• Average loans for the fourth quarter 2013 are expected to be stable compared to third quarter 2013, reflecting auto-dealer floor plan loans rebounding from a seasonal low along with a continued decline in mortgage warehouse lending and economic uncertainty impacting demand.

• Net interest income is expected to be lower for the fourth quarter 2013, compared to third quarter 2013, due to the continued impact from the low rate environment and a decrease in purchase accounting accretion.

• The provision for credit losses for the fourth quarter 2013 is expected to remain low, similar to the levels in previous 2013 quarters.

• Customer-driven noninterest income for the fourth quarter 2013 is expected to be relatively stable compared to third quarter 2013, while noncustomer-driven noninterest income is expected to be lower.

• Fourth quarter 2013 noninterest expense is expected to be slightly lower compared to third quarter 2013, reflecting continued tight expense control.

38

Net Interest Income

Quarterly Analysis of Net Interest Income & Rate/Volume - Fully Taxable Equivalent (FTE)

	Three Months Ended
	September 30, 2013							September 30, 2012
(dollar amounts in millions)	Average Balance			Interest		Average Rate		Average Balance			Interest		Average Rate
Commercial loans	$	27,759		$	226	3.25	%	$	26,700		$	227	3.38	%
Real estate construction loans	1,522			15		3.78		1,389			15		4.36
Commercial mortgage loans	8,943			88		3.90		9,670			106		4.34
Lease financing	839			7		3.21		852			4		2.04
International loans	1,252			12		3.76		1,302			12		3.77
Residential mortgage loans	1,642			17		3.98		1,488			17		4.67
Consumer loans	2,137			17		3.27		2,196			19		3.44
Total loans (a)	44,094			382		3.44		43,597			400		3.66
Mortgage-backed securities available-for-sale	8,989			54		2.41		9,360			57		2.46
Other investment securities available-for-sale	391			—		0.43		431			1		0.86
Total investment securities available-for-sale	9,380			54		2.32		9,791			58		2.38
Interest-bearing deposits with banks (b)	5,308			4		0.26		4,276			3		0.26
Other short-term investments	110			—		0.77		137			—		1.88
Total earning assets	58,892			440		2.97		57,801			461		3.19
Cash and due from banks	1,027							971
Allowance for loan losses	(622		)					(673		)
Accrued income and other assets	4,363							4,885
Total assets	$	63,660						$	62,984
Money market and interest-bearing checking deposits	$	21,894		7		0.13		$	20,483		8		0.17
Savings deposits	1,680			—		0.04		1,618			—		0.04
Customer certificates of deposit	5,384			6		0.41		5,894			8		0.52
Foreign office time deposits	528			—		0.48		381			1		0.71
Total interest-bearing deposits	29,486			13		0.18		28,376			17		0.24
Short-term borrowings	249			—		0.06		89			—		0.12
Medium- and long-term debt	3,590			14		1.54		4,745			16		1.35
Total interest-bearing sources	33,325			27		0.32		33,210			33		0.40
Noninterest-bearing deposits	22,379							21,469
Accrued expenses and other liabilities	1,033							1,260
Total shareholders’ equity	6,923							7,045
Total liabilities and shareholders’ equity	$	63,660						$	62,984
Net interest income/rate spread (FTE)				$	413	2.65					$	428	2.79
FTE adjustment				$	1						$	1
Impact of net noninterest-bearing sources of funds						0.14							0.17
Net interest margin (as a percentage of average earning assets) (FTE) (a) (b)						2.79	%						2.96	%

(a) Accretion of the purchase discount on the acquired loan portfolio of $8 million and $15 million increased the net interest margin by 5 basis points and 10 basis points in the three months ended September 30, 2013 and 2012, respectively.

(b) Excess liquidity, represented by average balances deposited with the Federal Reserve Bank, reduced the net interest margin by 24 basis points and 21 basis points in the three months ended September 30, 2013 and 2012, respectively.

39

Quarterly Analysis of Net Interest Income & Rate/Volume - Fully Taxable Equivalent (FTE) (continued)

	Three Months Ended
	September 30, 2013/September 30, 2012
(in millions)	Increase (Decrease) Due to Rate				Increase (Decrease) Due to  Volume (a)			Net Increase (Decrease)
Interest Income (FTE):
Loans	$	(21	)	(b)	$	3		$	(18	)	(b)
Investment securities available-for-sale	(3		)		(1		)	(4		)
Interest-bearing deposits with banks	—				1			1
Total interest income (FTE)	(24		)		3			(21		)
Interest Expense:
Interest-bearing deposits	(4		)		—			(4		)
Medium- and long-term debt	2				(4		)	(2		)
Total interest expense	(2		)		(4		)	(6		)
Net interest income (FTE)	$	(22	)		$	7		$	(15	)

(a) Rate/volume variances are allocated to variances due to volume.

(b) Reflected a decrease of $7 million in accretion of the purchase discount on the acquired loan portfolio.

Net interest income was $412 million for the three months ended September 30, 2013, a decrease of $15 million compared to $427 million for the three months ended September 30, 2012. The decrease in net interest income in the three months ended September 30, 2013, compared to the three months ended September 30, 2012, resulted primarily from a decrease in yields and a $7 million decrease in the accretion of the purchase discount on the acquired loan portfolio, partially offset by an increase in average earning assets and a decrease in funding costs. Average earning assets increased $1.1 billion, or 2 percent, to $58.9 billion for the three months ended September 30, 2013, compared to $57.8 billion for the same period in 2012. The increase in average earning assets primarily reflected increases of $497 million in average loans and $1.0 billion in average interest-bearing deposits with banks, partially offset by a decrease of $411 million in average investment securities available-for-sale. The net interest margin (FTE) for the three months ended September 30, 2013 decreased 17 basis points to 2.79% percent, from 2.96% percent for the comparable period in 2012, primarily from decreased yields on loans and mortgage-backed investment securities, a decrease in accretion of the purchase discount on the acquired loan portfolio and an increase in excess liquidity, partially offset by lower deposit rates. The decrease in loan yields reflected a shift in the average loan portfolio mix, largely due to volume shifts in business mix, as well as lower LIBOR rates, positive credit quality migration throughout the portfolio, an increase in lower-yielding average commercial loans and a decrease in higher-yielding commercial mortgage loans. Yields on mortgage-backed investment securities decreased as a result of prepayments on higher-yielding securities and new investments in lower-yielding securities impacted by the lower rate environment. Accretion of the purchase discount on the acquired loan portfolio increased the net interest margin by 5 basis points in the three months ended September 30, 2013, compared to 10 basis points in the same period in 2012, and excess liquidity reduced the net interest margin by approximately 24 basis points and 21 basis points in the three-month periods ended September 30, 2013 and 2012, respectively. Excess liquidity was represented by $5.2 billion and $4.2 billion of average balances deposited with the Federal Reserve Bank (FRB) in the three months ended September 30, 2013 and 2012, respectively, included in “interest-bearing deposits with banks” on the consolidated balance sheets. The "Quarterly Analysis of Net Interest Income & Rate/Volume - Fully Taxable Equivalent" table above provides an analysis of net interest income (FTE) for the three months ended September 30, 2013 and 2012 and details the components of the change in net interest income on a FTE basis for the three months ended September 30, 2013 compared to the same period in the prior year.

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Year-to-Date Analysis of Net Interest Income & Rate/Volume - Fully Taxable Equivalent (FTE)

	Nine Months Ended
	September 30, 2013							September 30, 2012
(dollar amounts in millions)	Average Balance			Interest		Average Rate		Average Balance			Interest		Average Rate
Commercial loans	$	28,069		$	688	3.28	%	$	25,810		$	673	3.48	%
Real estate construction loans	1,430			43		3.98		1,420			47		4.48
Commercial mortgage loans	9,177			271		3.95		9,951			337		4.51
Lease financing	850			21		3.22		873			19		2.92
International loans	1,265			35		3.73		1,257			35		3.73
Residential mortgage loans	1,600			50		4.13		1,498			52		4.66
Consumer loans	2,142			53		3.32		2,225			57		3.44
Total loans (a)	44,533			1,161		3.49		43,034			1,220		3.79
Mortgage-backed securities available-for-sale	9,339			158		2.29		9,317			177		2.60
Other investment securities available-for-sale	390			1		0.48		486			3		0.78
Total investment securities available-for-sale	9,729			159		2.21		9,803			180		2.51
Interest-bearing deposits with banks (b)	4,433			9		0.26		3,908			8		0.26
Other short-term investments	115			1		1.38		138			1		1.80
Total earning assets	58,810			1,330		3.03		56,883			1,409		3.32
Cash and due from banks	993							967
Allowance for loan losses	(627		)					(707		)
Accrued income and other assets	4,534							4,865
Total assets	$	63,710						$	62,008
Money market and interest-bearing checking deposits	$	21,594		22		0.13		$	20,577		26		0.18
Savings deposits	1,654			—		0.03		1,589			1		0.06
Customer certificates of deposit	5,603			19		0.44		5,993			25		0.54
Foreign office time deposits	513			2		0.54		373			2		0.64
Total interest-bearing deposits	29,364			43		0.19		28,532			54		0.25
Short-term borrowings	189			—		0.07		78			—		0.12
Medium- and long-term debt	4,109			43		1.42		4,846			49		1.36
Total interest-bearing sources	33,662			86		0.34		33,456			103		0.41
Noninterest-bearing deposits	21,991							20,415
Accrued expenses and other liabilities	1,104							1,141
Total shareholders’ equity	6,953							6,996
Total liabilities and shareholders’ equity	$	63,710						$	62,008
Net interest income/rate spread (FTE)				$	1,244	2.69					$	1,306	2.91
FTE adjustment				$	2						$	2
Impact of net noninterest-bearing sources of funds						0.14							0.17
Net interest margin (as a percentage of average earning assets) (FTE) (a) (b)						2.83	%						3.08	%

(a) Accretion of the purchase discount on the acquired loan portfolio of $26 million and $58 million increased the net interest margin by 6 basis points and 14 basis points in the nine months ended September 30, 2013 and 2012, respectively.

(b) Excess liquidity, represented by average balances deposited with the Federal Reserve Bank, reduced the net interest margin by 20 basis points in both the nine months ended September 30, 2013 and 2012.

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Year-to-Date Analysis of Net Interest Income & Rate/Volume - Fully Taxable Equivalent (FTE) (continued)

	Nine Months Ended
	September 30, 2013/September 30, 2012
(in millions)	Increase (Decrease) Due to Rate				Increase (Decrease) Due to  Volume (a)			Net Increase (Decrease)
Interest Income (FTE):
Loans	$	(93	)	(b)	$	34		$	(59	)	(b)
Investment securities available-for-sale	(23		)		2			(21		)
Interest-bearing deposits with banks	—				1			1
Total interest income (FTE)	(116		)		37			(79		)
Interest Expense:
Interest-bearing deposits	(12		)		1			(11		)
Medium- and long-term debt	2				(8		)	(6		)
Total interest expense	(10		)		(7		)	(17		)
Net interest income (FTE)	$	(106	)		$	44		$	(62	)

(a) Rate/volume variances are allocated to variances due to volume.

(b) Reflected a decrease of $32 million in accretion of the purchase discount on the acquired loan portfolio.

Net interest income was $1.2 billion for the nine months ended September 30, 2013, a decrease of $62 million compared to $1.3 billion for the same period in 2012. The decrease in net interest income in the nine months ended September 30, 2013, compared to the same period in 2012, resulted primarily from a decrease in yields and a $32 million decrease in the accretion of the purchase discount on the acquired loan portfolio, partially offset by an increase in average earning assets and lower funding costs. Average earning assets increased $1.9 billion, or 3 percent, to $58.8 billion for the nine months ended September 30, 2013, compared to $56.9 billion for the same period in 2012. The increase in average earning assets primarily reflected increases of $1.5 billion in average loans and $525 million in average interest-bearing deposits with banks. The net interest margin (FTE) for the nine months ended September 30, 2013 decreased 25 basis points to 2.83 percent, from 3.08 percent for the comparable period in 2012, primarily due to the reasons cited in the quarterly discussion above. Accretion of the purchase discount on the acquired loan portfolio increased the net interest margin by 6 basis points in the nine months ended September 30, 2013, compared to 14 basis points in the same period in 2012, and excess liquidity reduced the net interest margin by approximately 20 basis points for both the nine-month periods ended September 30, 2013 and 2012. Excess liquidity was represented by $4.3 billion and $3.8 billion of average balances deposited with the FRB in first nine months of 2013 and 2012, respectively, included in “interest-bearing deposits with banks” on the consolidated balance sheets. The "Year-to-Date Analysis of Net Interest Income & Rate/Volume - Fully Taxable Equivalent" table above provides an analysis of net interest income (FTE) for the nine months ended September 30, 2013 and 2012 and details the components of the change in net interest income on a FTE basis for the nine months ended September 30, 2013 compared to the same period in the prior year.

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 $8 million and $22 million for the three months ended September 30, 2013, and 2012, respectively, and $37 million and $63 million for the nine months ended September 30, 2013, and 2012, respectively. 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. For a discussion of the allowance for loan losses and the methodology used in the determination of the allowance for loan losses, refer to the "Credit Risk" and "Critical Accounting Policies" sections of this financial review. The provision for loan losses was $10 million for the three months ended September 30, 2013, compared to $23 million for the three months ended September 30, 2012, and was $35 million for the nine months ended September 30, 2013, compared to $54 million for the same period in the prior year. Credit quality in the loan portfolio continued to improve in the three- and nine-month periods ended September 30, 2013, compared to the same periods in the prior year, in part reflecting improvements in the U.S. economy. Improvements in credit quality included a decline of $977 million in the Corporation's internal watch list loans from September 30, 2012 to September 30, 2013. Reflected in the decline in watch list loans was a decrease in nonaccrual loans of $228 million. The Corporation's internal watch list is generally consistent with loans in the Special Mention, Substandard and Doubtful categories defined by regulatory authorities.

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Net loan charge-offs in the three months ended September 30, 2013 decreased $24 million to $19 million, or 0.18 percent of average total loans, compared to $43 million, or 0.39 percent, for the three months ended September 30, 2012. Net loan charge-offs in the first nine months of 2013 decreased $73 million to $60 million, or 0.18 percent of average total loans, compared to $133 million, or 0.41 percent, for the same period in 2012. The $24 million decrease in net loan charge-offs in the three months ended September 30, 2013, compared to the same period in 2012, and the $73 million decrease in net loan charge-offs in the first nine months of 2013, compared to the same period in 2012, reflected decreases in all geographic markets and across most business lines.

The provision for credit losses on lending-related commitments is recorded to maintain the allowance for credit losses on lending-related commitments at the level deemed appropriate by the Corporation to cover probable credit losses inherent in lending-related commitments. The provision for credit losses on lending-related commitments was a benefit of $2 million in the three months ended September 30, 2013, a decrease of $1 million compared to the three months ended September 30, 2012, and was a provision of $2 million for the nine months ended September 30, 2013, a decrease of $7 million compared to $9 million for the comparable period in prior year. The $7 million decrease in the provision for credit losses on lending-related commitments in the first nine months of 2013, compared to the same period in 2012, resulted primarily from the reduction of specific reserves established in 2012 for set aside/bonded stop loss commitments related to residential real estate construction credits in the California market. The reserves for set aside/bonded stop loss commitments were reduced in 2013 as the underlying commitments were funded and simultaneously charged-off against the allowance for loan losses. Lending-related commitment charge-offs were insignificant for the three months ended September 30, 2013 and 2012.

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.

Noninterest Income

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2013		2012		2013			2012
Customer-driven income:
Service charges on deposit accounts	$	53	$	53	$	161		$	162
Fiduciary income	41		39		128			116
Commercial lending fees	28		22		71			71
Letter of credit fees	17		19		49			54
Card fees (a)	20		16		55			48
Foreign exchange income	9		9		27			29
Brokerage fees	5		5		14			14
Other customer-driven income (b)	22		21		66			64
Total customer-driven noninterest income	195		184		571			558
Noncustomer-driven income:
Bank-owned life insurance	12		10		31			30
Net securities gains (losses)	1		—		(1		)	11
Other noncustomer-driven income (b)	6		3		21			15
Total noninterest income	$	214	$	197	$	622		$	614

(a) In the third quarter 2013, the Corporation reclassified PIN-based interchange and certain other similar fees to "card fees" from "other noninterest income." Prior period amounts reclassified to conform to current presentation were $5 million each for second and first quarter 2013, and $4 million, $5 million and $4 million for the third, second and first quarters 2012, respectively. In addition, $5 million was reclassified for fourth quarter 2012.

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

Noninterest income was $214 million for the three months ended September 30, 2013, an increase of $17 million compared to $197 million for the same period in 2012. Commercial lending fees increased $6 million in the three months ended September 30, 2013 compared to the three months ended September 30, 2012, primarily due to an increase in syndication agent fees. Card fees increased $4 million, primarily reflecting volume-driven increases in commercial charge card and debit card interchange revenue. Other noninterest income increased $4 million, primarily from a $7 million increase in income from principal investing and warrants, partially offset by a $3 million decrease in deferred compensation asset returns in the three months ended September 30, 2013, compared to the three months ended September 30, 2012. The decrease in deferred compensation asset returns in noninterest income is offset by an decrease in deferred compensation plan expense in noninterest expenses.

Noninterest income was $622 million for the nine months ended September 30, 2013, an increase of $8 million compared to $614 million for the same period in 2012. Fiduciary income increased $12 million, primarily reflecting an increase in personal trust fees, largely driven by an increase in the volume of fiduciary services sold and increases in market value. In addition, card fees increased $7 million, primarily for the same reasons described in the quarterly discussion above. Net securities gains (losses) decreased $12 million, primarily reflecting an $11 million decrease in gains from the redemption of auction-rate securities in the nine months ended September 30, 2013, compared to the same period in 2012.

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The following table illustrates certain categories included in "other noninterest income" on the consolidated statements of comprehensive income.

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Other noninterest income:
Other customer-driven income:
Investment banking fees	$	5		$	6		$	15		$	15
Customer derivative income	8			6			19			17
Insurance commissions	3			3			10			10
All other customer-driven income	6			6			22			22
Total other customer-driven income	22			21			66			64
Other noncustomer-driven income:
Securities trading income	3			5			11			14
Deferred compensation asset returns (a)	—			3			7			5
Income from principal investing and warrants	8			1			12			6
Amortization of low income housing investments	(14		)	(15		)	(41		)	(43		)
All other noncustomer-driven income	9			9			32			33
Total other noncustomer-driven income	6			3			21			15
Total other noninterest income	$	28		$	24		$	87		$	79

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

Noninterest Expenses

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2013		2012		2013		2012
Salaries	$	196	$	192	$	566	$	582
Employee benefits	59		61		185		181
Total salaries and employee benefits	255		253		751		763
Net occupancy expense	41		40		119		121
Equipment expense	15		17		45		50
Outside processing fee expense	31		27		89		79
Software expense	22		23		66		67
Merger and restructuring charges	—		25		—		33
FDIC insurance expense	9		9		26		29
Advertising expense	6		7		18		21
Other real estate expense	1		2		3		6
Other noninterest expenses	37		46		132		161
Total noninterest expenses	$	417	$	449	$	1,249	$	1,330

Noninterest expenses were $417 million for the three months ended September 30, 2013, a decrease of $32 million compared to $449 million for the three months ended September 30, 2012. There were no merger and restructuring charges in the three months ended September 30, 2013, compared to $25 million in the same period in 2012. Other noninterest expenses decreased $9 million, primarily reflecting a $12 million decrease in legal and litigation-related expenses, partially offset by the impact of $6 million of large gains recognized on the sale of assets included in other noninterest expenses in the third quarter 2012. Salaries expense increased $4 million in the three months ended September 30, 2013, compared to the same period in the prior year, primarily due to a year-to-date adjustment to senior officer incentive compensation in the three months ended September 30, 2013, based on favorable performance relative to peers, and an increase in business unit incentives, partially offset by a $3 million decrease in deferred compensation plan expense. Outside processing fee expense increased $4 million in the three months ended September 30, 2013, compared to the three months ended September 30, 2012, primarily due to increased activity tied to fee-based revenue growth, transactional costs related to increased volume and outsourcing of certain operational functions.

Noninterest expenses were $1.2 billion for the nine months ended September 30, 2013, a decrease of $81 million compared to $1.3 billion for the nine months ended September 30, 2012. There were no merger and restructuring charges in the nine months ended September 30, 2013, compared to $33 million in the same period in 2012. Other noninterest expenses decreased $29 million, primarily reflecting a $31 million decrease in legal and litigation-related expenses, as well as small decreases in several other categories of other noninterest expense, partially offset by the impact of $8 million of large gains recognized on the sale of assets

44

in the nine months ended September 30, 2012, and a $5 million loss on the sale of other foreclosed assets in the nine months ended September 30, 2013. Salaries expense decreased $16 million, primarily reflecting a decrease in executive incentive compensation and reduced staffing levels, partially offset by an increase in business unit incentives. Employee benefits expense increased $4 million, primarily due to an increase in pension expense, and outside processing fee expense increased $10 million in the nine months ended September 30, 2013, compared to the same period in the prior year, primarily for the same reasons cited in the quarterly discussion above.

Provision for Income Taxes

The provision for income taxes was $54 million for the three months ended September 30, 2013, compared to $36 million for the same period in 2012. The $18 million increase in the provision for income taxes in the three months ended September 30, 2013, compared to the same period in 2012, was primarily due to an increase in pretax income during the same period, partially offset by a $4 million benefit related to an interest refund received from the Internal Revenue Service in the third quarter 2012. The provision for income taxes for the nine months ended September 30, 2013 was $154 million, compared to $134 million for the same period in 2012. The $20 million increase in the provision for income taxes in the nine months ended September 30, 2013, compared to the same period in 2012, was primarily due to the reasons cited in the quarterly discussion above.

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STRATEGIC LINES OF BUSINESS

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.

In the first quarter 2013, the Corporation changed the method of assigning the allowance for loan losses to each segment. In 2012, national probability of default and loss given default statistics were incorporated into the Corporation's allowance methodology. Each segment was assigned an allowance for loan losses based on market-specific standard reserve factors applied to the loans in each segment, and the difference between the total allowance required on a national basis and the market-specific allowances was allocated based on the relative loan balances in each segment. Effective first quarter 2013, each segment is assigned an allowance for loan losses by applying national standard reserve factors to the loan balances in each segment by risk rating distribution. For comparability purposes, amounts in all periods are based on segments and methodologies in effect at September 30, 2013. Also in the first quarter 2013, the Corporation changed the method of allocating to the segments certain noninterest income and expense associated with commercial charge cards. The change did not have a material impact on segment operating results. For further information regarding the Corporation's segment methodologies, refer to page F-13 of the Corporation's 2012 Annual Report.

Business Segments

The Corporation's operations are strategically aligned into three major business segments: the Business Bank, the Retail Bank and Wealth Management. These business segments are differentiated based upon the products and services provided. In addition to the three major business segments, Finance is also reported as a segment. The Other category includes discontinued operations and 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. Note 13 to the consolidated financial statements describes the business activities of each business segment and presents financial results of these business segments for the nine months ended September 30, 2013 and 2012.

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

	Nine Months Ended September 30,
(dollar amounts in millions)	2013					2012
Business Bank	$	615		87	%	$	617		87	%
Retail Bank	27			4		42			6
Wealth Management	64			9		51			7
	706			100	%	710			100	%
Finance	(284		)			(280		)
Other (a)	2					(39		)
Total	$	424				$	391

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

The Business Bank's net income of $615 million for the nine months ended September 30, 2013 decreased $2 million, compared to $617 million for the nine months ended September 30, 2012. Net interest income (FTE) of $1.1 billion decreased $16 million in the nine months ended September 30, 2013, primarily due to lower loan yields and a $20 million decrease in accretion of the purchase discount on the acquired loan portfolio, partially offset by the benefit provided by an increase of $1.4 billion in average loans, a decrease in net funds transfer pricing (FTP) charges and lower deposit rates. Average deposits increased $1.5 billion in the nine months ended September 30, 2013, compared to the same period in the prior year. The provision for credit losses increased $1 million, to $29 million for the nine months ended September 30, 2013, compared to the same period in the prior year, primarily due to first quarter 2013 enhancements to the approach utilized to determine the allowance for loan losses and loan growth, largely offset by improvements in credit quality. Net credit-related charge-offs of $37 million decreased $44 million in the nine months ended September 30, 2013, compared to the nine months ended September 30, 2012, primarily reflecting decreases in Commercial Real Estate and general Middle Market. Noninterest income of $246 million for the nine months ended September 30, 2013 increased $6 million from the comparable period in the prior year, primarily due to an increase in principal investing and warrant income ($6 million). Noninterest expenses of $446 million for the nine months ended September 30, 2013 decreased $7 million compared to the same period in the prior year, primarily due to small decreases in several other noninterest expense categories, partially offset by a write-down of other foreclosed assets in the nine months ended September 30, 2013 ($5 million), and the impact of large gains recognized on the sale of assets in the nine months ended September 30, 2012 ($5 million) .

Net income for the Retail Bank of $27 million for the nine months ended September 30, 2013 decreased $15 million, compared to $42 million for the nine months ended September 30, 2012. Net interest income (FTE) of $460 million decreased

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$31 million in the nine months ended September 30, 2013, primarily due to an $11 million decrease in accretion of the purchase discount on the acquired loan portfolio, a decrease in net FTP credits, lower loan yields and a $48 million decrease in average loans, partially offset by lower deposit rates. Average deposits increased $656 million. The provision for credit losses of $21 million for the nine months ended September 30, 2013 increased $5 million from the comparable period in the prior year, primarily reflecting an increase in Small Business. Net credit-related charge-offs of $18 million for the nine months ended September 30, 2013 decreased $16 million compared to the nine months ended September 30, 2012, primarily reflecting decreases in Small Business and Retail Banking in the three primary geographic markets. Noninterest income of $132 million for the nine months ended September 30, 2013 increased $1 million compared to the nine months ended September 30, 2012, primarily reflecting an increase in card fees ($4 million), primarily due to the change in the method of allocating commercial card income as discussed above, partially offset by a decrease in service charges on deposit accounts ($3 million). Noninterest expenses of $530 million for the nine months ended September 30, 2013 decreased $13 million from the comparable period in the prior year, primarily due to decreases in FDIC deposit insurance expense ($4 million), corporate overhead expense ($3 million) and small decreases in several other noninterest expense categories.

Wealth Management's net income of $64 million for the nine months ended September 30, 2013 increased $13 million, compared to $51 million for the nine months ended September 30, 2012. Net interest income (FTE) of $138 million for the nine months ended September 30, 2013 decreased $2 million compared to the nine months ended September 30, 2012, primarily due to lower loan yields, partially offset by the benefits provided by a $104 million increase in average loans and an $82 million increase in average deposits. The provision for credit losses was a benefit of $8 million for the nine months ended September 30, 2013, a decrease of $26 million compared to the nine months ended September 30, 2012, primarily due to improvements in credit quality. Net credit-related charge-offs were $5 million for the nine months ended September 30, 2013, compared to $18 million for the nine months ended September 30, 2012. Noninterest income of $191 million decreased $2 million from the comparable period in the prior year, primarily reflecting a decrease in net securities gains ($11 million) from the redemption of auction-rate securities, partially offset by an increase in fiduciary income ($8 million). Noninterest expenses of $238 million for the nine months ended September 30, 2013 increased $2 million from the nine months ended September 30, 2012.

The net loss in the Finance segment was $284 million for the nine months ended September 30, 2013, compared to a net loss of $280 million for the nine months ended September 30, 2012. Net interest expense (FTE) of $492 million for the nine months ended September 30, 2013 increased $9 million, compared to the nine months ended September 30, 2012, reflecting a $19 million decrease in interest earned on mortgage-backed investment securities. Noninterest income of $47 million for the nine months ended September 30, 2013 increased $3 million compared to the nine months ended September 30, 2012. Noninterest expenses of $7 million for the nine months ended September 30, 2013 decreased $1 million from the comparable period in the prior year.

Net income in the Other category of $2 million for the nine months ended September 30, 2013 increased $41 million, compared to a net loss of $39 million for the nine months ended September 30, 2012. The increase in net income primarily reflected a $62 million decrease in noninterest expenses, primarily due to decreases in merger and restructuring costs ($33 million) and litigation-related expenses ($20 million).

Market Segments

Market segment results are provided for the Corporation's three largest geographic markets: Michigan, California and Texas. In addition to the three largest geographic markets, Other Markets is also reported as a market segment. The Finance & Other category includes the Finance segment and the Other category as previously described in the "Business Segments" section of this financial review. Note 13 to these consolidated financial statements presents a description of each of these market segments as well as the financial results for the nine months ended September 30, 2013 and 2012.

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

	Nine Months Ended September 30,
(dollar amounts in millions)	2013					2012
Michigan	$	229		32	%	$	231		32	%
California	192			27		197			28
Texas	124			18		135			19
Other Markets	161			23		147			21
	706			100	%	710			100	%
Finance & Other (a)	(282		)			(319		)
Total	$	424				$	391

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

The Michigan market's net income of $229 million for the nine months ended September 30, 2013 decreased $2 million, compared to $231 million for the nine months ended September 30, 2012. Net interest income (FTE) of $564 million for the nine months ended September 30, 2013 decreased $21 million from the comparable period in the prior year, primarily due to lower

47

loan yields and the impact of a $179 million decrease in average loans, partially offset by lower deposit rates and a decrease in net FTP charges. Average deposits increased $871 million. The provision for credit losses was a benefit of $19 million for the nine months ended September 30, 2013, a decrease of $12 million compared to the same period in the prior year, primarily due to improvements in credit quality and lower loan balances. Net credit-related charge-offs of $10 million for the nine months ended September 30, 2013 decreased $30 million from the comparable period in the prior year, primarily reflecting decreases in Commercial Real Estate and Middle Market. Noninterest income of $268 million for the nine months ended September 30, 2013 decreased $21 million from the comparable period in 2012, primarily due to a decrease in card fees ($14 million), due to the change in the method of allocating commercial card income as discussed above, and small decreases in several other noninterest income categories, partially offset by an increase in fiduciary income ($3 million). Noninterest expenses of $496 million in the nine months ended September 30, 2013 decreased $31 million from the comparable period in the prior year, primarily due to a decrease in corporate overhead expense ($5 million) and small decreases in most noninterest expense categories.

The California market's net income of $192 million decreased $5 million in the nine months ended September 30, 2013, compared to $197 million for the nine months ended September 30, 2012. Net interest income (FTE) of $516 million for the nine months ended September 30, 2013 increased $2 million from the comparable period in the prior year, primarily due to the benefit provided by a $1.3 billion increase in average loans, lower deposit rates and a decrease in net FTP charges, reflecting the benefit provided by a $262 million increase in average deposits, partially offset by lower loan yields. The provision for credit losses of $25 million in the nine months ended September 30, 2013 increased $16 million from the comparable period in the prior year, primarily due to loan growth and first quarter 2013 enhancements to the approach utilized to determine the allowance for loan losses. Net credit-related charge-offs of $30 million in the nine months ended September 30, 2013 decreased $4 million compared to the nine months ended September 30, 2012, primarily reflecting decreases in Small Business and general Middle Market, partially offset by increases in Technology and Life Sciences and Corporate Banking. Noninterest income of $113 million for the nine months ended September 30, 2013 increased $12 million from the comparable period in prior year, primarily due to an increase in card fees ($8 million), due to the change in the method of allocating commercial card income as discussed above, and principal investing and warrant income ($4 million). Noninterest expenses of $298 million in the nine months ended September 30, 2013 increased $4 million from the comparable period in the prior year, primarily due to a a write-down of other foreclosed assets in the nine months ended September 30, 2013 ($5 million).

The Texas market's net income decreased $11 million to $124 million for the nine months ended September 30, 2013, compared to $135 million for the nine months ended September 30, 2012. Net interest income (FTE) of $394 million for the nine months ended September 30, 2013 decreased $35 million from the comparable period in the prior year, primarily due to a $32 million decrease in accretion of the purchase discount on the acquired loan portfolio and lower loan yields, partially offset by the benefit provided by a $602 million increase in average loans. Average deposits increased $31 million in the nine months ended September 30, 2013, compared to the same period in the prior year. The provision for credit losses of $31 million for the nine months ended September 30, 2013 decreased $12 million from the comparable period in the prior year, primarily reflecting improvements in credit quality. Net credit-related charge-offs of $7 million for the nine months ended September 30, 2013 decreased $10 million from the comparable period in the prior year, primarily reflecting decreases in Commercial Real Estate and general Middle Market. Noninterest income of $100 million for the nine months ended September 30, 2013 increased $7 million from the comparable period in the prior year, primarily due to an increase in card fees ($5 million), due to the change in the method of allocating commercial card income as discussed above. Noninterest expenses of $272 million for the nine months ended September 30, 2013 increased $1 million from the nine months ended September 30, 2012.

Net income in Other Markets of $161 million for the nine months ended September 30, 2013 increased $14 million compared to $147 million for the nine months ended September 30, 2012. Net interest income (FTE) of $239 million for the nine months ended September 30, 2013 increased $5 million from the comparable period in the prior year, primarily due to an increase in net FTP credits, primarily the result of the benefits provided by an increase of $1.1 billion in average deposits, partially offset by the impact of a $189 million decrease in average loans and lower loan yields. The provision for credit losses decreased $12 million in the nine months ended September 30, 2013, compared to the same period in the prior year, primarily reflecting improvements in credit quality and lower loan balances. Net credit-related charge-offs of $13 million for the nine months ended September 30, 2013 decreased $29 million from the comparable period in the prior year, primarily reflecting decreases in Private Banking and Commercial Real Estate. Noninterest income of $88 million for the nine months ended September 30, 2013 increased $7 million from the comparable period in the prior year, reflecting increases in card fees ($8 million), in part due to the change in the method of allocating commercial card income as discussed above, fiduciary income ($5 million) and small increases in several other noninterest income categories, partially offset by a decrease in net securities gains ($11 million) from the redemption of auction-rate securities. Noninterest expenses of $148 million for the nine months ended September 30, 2013 increased $8 million compared to prior year due to an increase in outside processing fees ($5 million) and small increases in several noninterest expense categories.

The net loss for the Finance & Other category of $282 million in the nine months ended September 30, 2013 decreased $37 million compared to the nine months ended September 30, 2012. For further information, refer to the Finance segment and Other category discussions under the "Business Segments" subheading above.

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

	September 30,
	2013	2012
Michigan	215	216
Texas	136	140
California	105	105
Other Markets:
Arizona	18	18
Florida	9	10
Canada	1	1
Total Other Markets	28	29
Total	484	490

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FINANCIAL CONDITION

Total assets were $64.7 billion at September 30, 2013, a decrease of $399 million from $65.1 billion at December 31, 2012, primarily reflecting decreases of $1.9 billion in total loans, $809 million in investment securities available-for-sale and $226 million in accrued income and other assets, partially offset by a $2.7 billion increase in interest-bearing deposits with banks. On an average basis, total assets decreased $597 million to $63.7 billion in the third quarter 2013, compared to $64.3 billion in the fourth quarter 2012, resulting primarily from decreases of $870 million in average investment securities available-for-sale and $242 million in accrued income and other assets, partially offset by a $523 million increase in average interest-bearing deposits with banks.

The following tables provide information about the change in the Corporation's average loan portfolio in the third quarter 2013, compared to the fourth quarter 2012.

	Three Months Ended							Percent Change
(dollar amounts in millions)	September 30, 2013		December 31, 2012		Change
Average Loans:
Commercial loans by business line:
General Middle Market	$	9,970	$	9,643	$	327		3	%
National Dealer Services	3,423		3,141		282			9
Energy	2,870		2,816		54			2
Technology and Life Sciences	1,896		1,776		120			7
Environmental Services	736		678		58			9
Entertainment	573		637		(64		)	(10	)
Total Middle Market	19,468		18,691		777			4
Corporate Banking	3,161		3,354		(193		)	(6	)
Mortgage Banker Finance	1,605		2,094		(489		)	(23	)
Commercial Real Estate	764		741		23			3
Total Business Bank commercial loans	24,998		24,880		118			—
Total Retail Bank commercial loans	1,383		1,200		183			15
Total Wealth Management commercial loans	1,378		1,382		(4		)	—
Total commercial loans	27,759		27,462		297			1
Real estate construction loans	1,522		1,299		223			17
Commercial mortgage loans	8,943		9,519		(576		)	(6	)
Lease financing	839		839		—			—
International loans	1,252		1,314		(62		)	(5	)
Residential mortgage loans	1,642		1,525		117			8
Consumer loans	2,137		2,161		(24		)	(1	)
Total loans	$	44,094	$	44,119	$	(25	)	—	%
Average Loans By Geographic Market:
Michigan	$	13,276	$	13,415	$	(139	)	(1	)%
California	14,002		13,275		727			5
Texas	9,942		9,818		124			1
Other Markets	6,874		7,611		(737		)	(10	)
Total loans	$	44,094	$	44,119	$	(25	)	—	%

Average loans for the three months ended September 30, 2013 decreased $25 million, compared to the three months ended December 31, 2012, reflecting an increase of $297 million, or 1 percent in average commercial loans, partially offset by a decrease of $353 million, or 3 percent, in combined commercial mortgage and real estate construction loans. The $297 million increase in average commercial loans primarily reflected an increase in Middle Market ($777 million), partially offset by decreases in Mortgage Banker Finance ($489 million) and Corporate Banking ($193 million). The decline in Mortgage Banker Finance, which provides mortgage warehousing lines, primarily reflected a decline in residential mortgage refinancing activity. The increase in Middle Market primarily reflected increases in general Middle Market ($327 million), National Dealer Services ($282 million) and Technology and Life Sciences ($120 million). In general, Middle Market serves customers with annual revenue between $20 million and $500 million; while Corporate serves customers with revenue over $500 million. Changes in average total loans by geographic market is provided in the table above.

Investment securities available-for-sale decreased $809 million to $9.5 billion at September 30, 2013, from $10.3 billion at December 31, 2012, and decreased $870 million, on an average basis, in the third quarter 2013, compared to the fourth quarter 2012. The decreases primarily reflected a slowing of the pace of purchases replacing paydowns on residential mortgage-backed

50

investment securities in the second and third quarters of 2013 as well as a decline in fair value, primarily due to the rise in long term interest rates in the second quarter of 2013. Unrealized gains (losses) on investment securities available-for-sale declined $270 million to an unrealized loss of $34 million at September 30, 2013, compared to an unrealized gain of $236 million at December 31, 2012. On an average basis, unrealized gains (losses) declined $303 million in the third quarter 2013, compared to the fourth quarter 2012.

Total liabilities decreased $426 million to $57.7 billion at September 30, 2013, compared to $58.1 billion at December 31, 2012, primarily due to a decrease of $1.2 billion in medium- and long-term debt, partially offset by an increase of $617 million in noninterest-bearing deposits. On an average basis, total liabilities decreased $458 million in the third quarter 2013, compared to the fourth quarter 2012, primarily due to decreases of $1.1 billion in medium- and long-term debt and $379 million in noninterest-bearing deposits, partially offset by an increase of $962 million in interest-bearing deposits. The decrease in medium- and long-term debt primarily reflected the May 2013 maturity of $1 billion of Federal Home Loan Bank advances. The decrease in average noninterest-bearing deposits primarily reflected a decrease in general Middle Market ($522 million), largely due to a decline in the Financial Services Division ($570 million), which provides services to title and escrow companies. The increase in average interest-bearing deposits primarily reflected an increase of $1.1 billion in money market and interest-bearing checking deposits, partially offset by a $250 million decrease in customer certificates of deposit. By geographic market, the increase in average total deposits of $583 million from the fourth quarter 2012 to the third quarter 2013 primarily reflected increases in Other Markets ($519 million), Texas ($489 million) and Michigan ($447 million), partially offset by a decrease in the California market ($890 million). The decrease in the California market primarily reflected decreases in general Middle Market (primarily in the Financial Services Division) and Technology and Life Sciences, partially offset by an increase in Commercial Real Estate.

Capital

Total shareholders' equity increased $27 million to $7.0 billion at September 30, 2013, compared to December 31, 2012. The increase in total shareholders' equity included a $128 million increase in accumulated other comprehensive loss, primarily reflecting a temporary unrealized loss on investment securities available-for-sale of $171 million, net of tax, largely due to the impact of a rise in long-term interest rates on the fair value of mortgage-backed investment securities. The following table presents a summary of changes in total shareholders' equity in the nine months ended September 30, 2013.

(in millions)
Balance at January 1, 2013				$	6,942
Net income				424
Cash dividends declared on common stock				(95		)
Purchase of common stock				(218		)
Other comprehensive income (loss):
Investment securities available-for-sale	$	(171	)
Defined benefit and other postretirement plans	43
Total other comprehensive loss				(128		)
Issuance of common stock under employee stock plans				17
Share-based compensation				27
Balance at September 30, 2013				$	6,969

The Federal Reserve completed its review of the Corporation's 2013 capital plan in March 2013 and did not object to the capital distributions contemplated in the plan. The capital plan includes up to $288 million of equity repurchases for the four-quarter period ending March 31, 2014. In January 2013, the Corporation increased the quarterly cash dividend from $0.15 per share to $0.17 per share, an increase of 13 percent, effective with the April 2013 dividend payment. The January 2013 dividend increase was contemplated in the Corporation's 2012 capital plan.

On November 16, 2010, the Board of Directors of the Corporation authorized the repurchase of up to 12.6 million shares of Comerica Incorporated outstanding common stock and authorized the purchase of up to all 11.5 million of the Corporation's original outstanding warrants. On April 24, 2012 and April 23, 2013, the Board authorized the repurchase of up to an additional 5.7 million shares and up to an additional 10.0 million shares of Comerica Incorporated outstanding common stock, respectively. There is no expiration date for the Corporation's share repurchase program. For further information regarding the repurchase program, refer to Note 13 to the consolidated financial statements in the Corporation's 2012 Annual Report.

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The following table summarizes the Corporation's repurchase activity during the nine months ended September 30, 2013.

(shares in thousands)	Total Number of Shares and Warrants Purchased as  Part of Publicly Announced Repurchase Plans or Programs	Remaining Repurchase Authorization (a)		Total Number of Shares Purchased (b)	Average Price Paid Per  Share		Average Price Paid Per  Warrant (c)
Total first quarter 2013	2,090	13,461		2,182	$	33.94	$	—
Total second quarter 2013	1,910	21,551	(d)	1,913	37.67		—
July 2013	597	20,954		620	41.98		—
August 2013	978	19,976		978	42.10		—
September 2013	139	19,837		139	41.11		—
Total third quarter 2013	1,714	19,837		1,737	41.98		—
Total 2013	5,714	19,837		5,832	$	37.56	$	—

(a) Maximum number of shares and warrants that may yet be purchased under the publicly announced plans or programs.

(b) Includes approximately 118 thousand 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 nine months ended September 30, 2013. These transactions are not considered part of the Corporation's repurchase program.

(c) The Corporation made no repurchases of warrants under the repurchase program during the nine months ended September 30, 2013.

(d) Includes the impact of the additional share repurchase authorization approved by the Board on April 23, 2013.

Risk-based regulatory capital standards are designed to make regulatory capital requirements more sensitive to differences in credit risk profiles among banking institutions and to account for off-balance sheet exposure. Assets and off-balance sheet items are assigned to broad risk categories, each with specified risk-weighting factors. The resulting capital ratios represent capital as a percentage of total risk-weighted assets and off-balance sheet items. As shown in the table below, the Corporation's capital ratios increased from December 31, 2012 to September 30, 2013.

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

	September 30, 2013				December 31, 2012
(dollar amounts in millions)	Capital		Ratio		Capital		Ratio
Tier 1 common (a) (b)	$	6,863	10.74	%	$	6,705	10.14	%
Tier 1 risk-based (4.00% - minimum) (b)	6,863		10.74		6,705		10.14
Total risk-based (8.00% - minimum) (b)	8,593		13.44		8,695		13.15
Leverage (3.00% - minimum) (b)	6,863		10.88		6,705		10.57
Tangible common equity (a)	6,316		9.87		6,285		9.76

(a) See Supplemental Financial Data section for reconcilements of non-GAAP financial measures.

(b) September 30, 2013 capital and ratios are estimated.

In July 2013, U.S. banking regulators issued a final rule for the U.S. adoption of the Basel III regulatory capital framework. The regulatory framework includes a more conservative definition of capital, two new capital buffers - a conservation buffer and a countercyclical buffer, new and more stringent risk weight categories for assets and off-balance sheet items, and a supplemental leverage ratio. As a banking organization subject to the standardized approach, the rules will be effective for the Corporation on January 1, 2015, with certain transition provisions fully phased in on January 1, 2018.

According to the rule, the Corporation will be subject to the capital conservation buffer of 2.5 percent, when fully phased in, to avoid restrictions on capital distributions and discretionary bonuses. However, the rules do not subject the Corporation to the capital countercyclical buffer of up to 2.5 percent or the supplemental leverage ratio. The Corporation estimates the September 30, 2013 Tier 1 and Tier 1 common risk-based ratio would be 10.4 percent if calculated under the final rule, excluding most elements of accumulated other comprehensive income from regulatory capital. The Corporation's September 30, 2013 estimated Tier 1 common and Tier 1 capital ratios exceed the minimum required by the final rule (7 percent and 8.5 percent, respectively, including the fully phased-in capital conservation buffer). For a reconcilement of these non-GAAP financial measures, refer to the "Supplemental Financial Data" section of this financial review.

On October 24, 2013, U.S. banking regulators issued a Notice of Proposed Rulemaking that would implement a quantitative liquidity requirement in the U.S. (the proposed rule) generally consistent with the Liquidity Coverage Ratio (LCR) minimum liquidity measure established under the Basel III liquidity framework. Under the proposed rule, the Corporation would be subject to a modified LCR standard, which requires a financial institution to hold a buffer of high-quality, liquid assets to fully cover net cash outflows under a 21-day systematic liquidity stress scenario. Under the proposal, the LCR rules would be fully phased in on January 1, 2017, with a transition period beginning January 1, 2015. The Corporation is currently evaluating the potential impact of the proposed rule; however, we expect to meet the final requirements adopted by U.S. banking regulators within the required timetable. While the Corporation's liquidity position is currently strong, balance sheet dynamics may vary in the future and as a

52

result the Corporation may decide to consider additional liquidity management initiatives if subject to the modified LCR as currently proposed. The Basel III liquidity framework includes a second minimum liquidity measure, the Net Stable Funding Ratio (NSFR), which requires the amount of available longer-term, stable sources of funding to be at least 100 percent of the required amount of longer-term stable funding over a one-year period. The Basel Committee on Banking Supervision is in the process of reviewing the proposed NSFR standard and evaluating its impact on the banking system. U.S. banking regulators have announced that they expect to issue proposed rulemaking to implement the NFSR in advance of its scheduled global implementation in 2018. While uncertainty exists in the final form and timing of the U.S. rule implementing the NSFR and whether or not the Corporation will be subject to the full requirements, the Corporation is closely monitoring the development of the rule.

53

RISK MANAGEMENT

The following updated information should be read in conjunction with the "Risk Management" section on pages F-23 through F-41 in the Corporation's 2012 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 Corporation disaggregates the loan portfolio into segments for purposes of determining the allowance for credit losses. These segments are based on the level at which the Corporation develops, documents and applies a systematic methodology to determine the allowance for credit losses. The Corporation's portfolio segments are business loans and retail loans. Business loans are defined as those belonging to the commercial, real estate construction, commercial mortgage, lease financing and international loan portfolios. Retail loans consist of traditional residential mortgage, home equity and other consumer loans.

The allowance for loan losses includes specific allowances, based on individual evaluations of certain loans, and allowances for homogeneous pools of loans with similar risk characteristics. In the first quarter 2013, the Corporation implemented enhancements to the approach utilized for determining standard reserve factors for business loans not individually evaluated by changing from a dollar-based migration method for developing probability of default statistics to a count-based method. Under the dollar-based method, each dollar that moved to default received equal weight in the determination of standard reserve factors for each internal risk rating. As a result, the movement of larger loans impacted standard reserve factors more than the movement of smaller loans. By moving to a count-based approach, where each loan that moves to default receives equal weighting, unusually large or small loans will not have a disproportionate influence on the standard reserve factors. The change resulted in a $40 million increase to the allowance for loan losses at March 31, 2013.

While the overall credit quality of the loan portfolio continued to improve in the third quarter 2013, ongoing economic uncertainty continued to be a consideration when determining the appropriateness of the allowance for loan losses. Recent economic data provided mixed results. Positive factors included increased personal and real disposable income figures, a decrease in initial unemployment claims in September, an increase in new home sales and better-than-expected manufacturing data. However, consumer spending has been weak to moderate. Federal spending continued to be suppressed as a result of the budget sequester that took effect at the end of March. In addition, the Federal Reserve continued its program of asset purchases through September, signaling ongoing economic uncertainty. The recent federal government shutdown of non-essential services and the showdown over raising the debt ceiling amplified ongoing concerns about fiscal and monetary policy.

The allowance for loan losses was $604 million at September 30, 2013, compared to $629 million at December 31, 2012, a decrease of $25 million, or 4 percent. The decrease resulted primarily from a reduction in specific reserves, the elimination and reductions of certain incremental industry reserves, primarily due to lower levels of gross charge-offs in those industries, and lower loan balances, partially offset by an increase in the allowance for loan losses resulting from the enhancements to the approach utilized for determining standard reserve factors described above and an increase in qualitative factors that indicate overall economic uncertainty. The $25 million decrease in the allowance for loan losses primarily reflected decreased reserves in Commercial Real Estate, Corporate Banking, general Middle Market and Private Banking, partially offset by increased reserves in Technology and Life Sciences and Energy. By market, reserves decreased in Michigan, California and Other Markets and increased in Texas (primarily Energy).

Acquired loans were initially recorded at fair value, which included an estimate of credit losses expected to be realized over the remaining lives of the loans, and therefore no corresponding allowance for loan losses was recorded for these loans at acquisition. Methods utilized to estimate the required allowance for loan losses for acquired loans not deemed credit-impaired at acquisition are similar to originated loans; however, the estimate of loss is based on the unpaid principal balance less the remaining purchase discount, either on an individually evaluated basis or based on the pool of acquired loans not deemed credit-impaired at acquisition within each risk rating, as applicable. At September 30, 2013, there was no allowance for loan losses on acquired loans, and $24 million of purchase discount remained, compared to a $3 million allowance for loan losses and $41 million of remaining purchase discount at December 31, 2012.

The total allowance for loan losses is sufficient to absorb incurred losses inherent in the total loan portfolio. Unanticipated economic events, including political, economic and regulatory instability could cause changes in the credit characteristics of the portfolio and result in an unanticipated increase in the allowance. Inclusion of other industry-specific portfolio exposures in the allowance, as well as significant increases in the current portfolio exposures, could also increase the amount of the allowance.

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Any of these events, or some combination thereof, may result in the need for additional provision for loan losses in order to maintain an allowance that complies with credit risk and accounting policies.

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 at September 30, 2013 compared to $32 million at December 31, 2012. The $2 million increase in the allowance for credit losses on lending-related commitments resulted primarily from an increase in reserves for unused commitments to extend credit in the first nine months of 2013. An allowance for credit losses will be recorded on acquired lending-related commitments only to the extent that the required allowance exceeds the remaining purchase discount. The purchase discount remaining for acquired lending-related commitments was $1 million and $2 million at September 30, 2013 and December 31, 2012, respectively. No allowance was recorded on acquired lending-related commitments at September 30, 2013 and December 31, 2012.

For additional information regarding the allowance for credit losses, refer to the "Critical Accounting Policies" section of this financial review and Notes 1 and 4 to these unaudited consolidated financial statements.

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. Nonperforming assets do not include purchased credit impaired (PCI) loans.

The following table presents a summary of nonperforming assets and past due loans.

(dollar amounts in millions)	September 30, 2013			December 31, 2012
Nonaccrual loans:
Business loans:
Commercial	$	107		$	103
Real estate construction:
Commercial Real Estate business line (a)	24			30
Other business lines (b)	1			3
Total real estate construction	25			33
Commercial mortgage:
Commercial Real Estate business line (a)	67			94
Other business lines (b)	139			181
Total commercial mortgage	206			275
Lease financing	—			3
Total nonaccrual business loans	338			414
Retail loans:
Residential mortgage	63			70
Consumer:
Home equity	34			31
Other consumer	2			4
Total consumer	36			35
Total nonaccrual retail loans	99			105
Total nonaccrual loans	437			519
Reduced-rate loans	22			22
Total nonperforming loans	459			541
Foreclosed property	19			54
Total nonperforming assets	$	478		$	595
Nonperforming loans as a percentage of total loans	1.04		%	1.17		%
Nonperforming assets as a percentage of total loans and foreclosed property	1.08			1.29
Allowance for loan losses as a percentage of total nonperforming loans	131			116
Loans past due 90 days or more and still accruing	$	25		$	23
Loans past due 90 days or more and still accruing as a percentage of total loans	0.06		%	0.05		%

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

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Nonperforming assets decreased $117 million to $478 million at September 30, 2013, from $595 million at December 31, 2012. The decrease in nonperforming assets primarily reflected decreases in nonaccrual commercial mortgage loans ($69 million) and foreclosed property ($35 million). Nonperforming assets as a percentage of total loans and foreclosed property was 1.08 percent at September 30, 2013, compared to 1.29 percent at December 31, 2012.

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

	Three Months Ended
(in millions)	September 30, 2013			June 30, 2013			December 31, 2012
Balance at beginning of period	$	449		$	494		$	665
Loans transferred to nonaccrual (a)	50			37			36
Nonaccrual business loan gross charge-offs (b)	(25		)	(25		)	(54		)
Nonaccrual business loans sold (c)	(17		)	(9		)	(48		)
Payments/other (d)	(20		)	(48		)	(80		)
Balance at end of period	$	437		$	449		$	519
(a) Based on an analysis of nonaccrual loans with book balances greater than $2 million.
(b) Analysis of gross loan charge-offs:
Nonaccrual business loans	$	25		$	25		$	54
Performing watch list loans	5			5			—
Retail loans	9			5			6
Total gross loan charge-offs	$	39		$	35		$	60
(c) Analysis of loans sold:
Nonaccrual business loans	$	17		$	9		$	48
Performing watch list loans	31			40			24
Total loans sold	$	48		$	49		$	72
(d) Includes net changes related to nonaccrual loans with balances less than $2 million, payments on nonaccrual loans with book balances greater than $2 million, transfers of nonaccrual loans to foreclosed property and retail loan gross charge-offs. Excludes business loan gross charge-offs and nonaccrual business loans sold.

There were 9 borrowers with balances greater than $2 million, totaling $50 million, transferred to nonaccrual status in the third quarter 2013, an increase of $13 million when compared to $37 million in the first quarter 2013. Of the transfers to nonaccrual greater than $2 million in the third quarter 2013, $26 million were from Middle Market.

The following table presents the composition of nonaccrual loans by balance and the related number of borrowers at September 30, 2013 and December 31, 2012.

	September 30, 2013			December 31, 2012
(dollar amounts in millions)	Number of Borrowers	Balance		Number of Borrowers	Balance
Under $2 million	1,827	$	240	1,609	$	277
$2 million - $5 million	24	74		35	112
$5 million - $10 million	9	59		11	82
$10 million - $25 million	5	64		4	48
Total	1,865	$	437	1,659	$	519

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The following table presents a summary of nonaccrual loans at September 30, 2013 and loans transferred to nonaccrual and net loan charge-offs for the three months ended September 30, 2013, based primarily on Standard Industrial Classification (SIC) industry categories.

	September 30, 2013				Three Months Ended September 30, 2013
(dollar amounts in millions)	Nonaccrual Loans				Loans Transferred to Nonaccrual (a)				Net Loan Charge-Offs (Recoveries)
Industry Category
Real Estate	$	120	28	%	$	10	21	%	$	7		32	%
Services	71		16		7		13		6			30
Residential Mortgage	63		14		6		12		—			2
Holding & Other Investment Companies	40		9		8		16		4			20
Retail Trade	30		7		—		—		—			2
Manufacturing	20		5		—		—		1			2
Hotels	11		3		—		—		(4		)	(23	)
Utilities	11		2		—		—		—			—
Wholesale Trade	9		2		—		—		—			1
Contractors	6		1		—		—		(1		)	(3	)
Natural Resources	20		5		13		27		—			2
Finance	1		—		—		—		(2		)	(8	)
Transportation & Warehousing	1		—		—		—		(1		)	(5	)
Other (b)	34		8		6		11		9			48
Total	$	437	100	%	$	50	100	%	$	19		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.

The following table presents a summary of TDRs at September 30, 2013 and December 31, 2012.

(in millions)	September 30, 2013		December 31, 2012
Nonperforming TDRs:
Nonaccrual TDRs	$	123	$	118
Reduced-rate TDRs	22		22
Total nonperforming TDRs	145		140
Performing TDRs (a)	60		92
Total TDRs	$	205	$	232

(a) TDRs that do not include a reduction in the original contractual interest rate which are performing in accordance with their modified terms.

Performing TDRs included $43 million of commercial mortgage loans (primarily in the Commercial Real Estate and Small Business Banking business lines) and $17 million of commercial loans (primarily in the Middle Market and Small Business Banking business lines) at September 30, 2013.

Loans past due 90 days or more and still accruing are summarized in the following table.

(in millions)	September 30, 2013		December 31, 2012
Business loans:
Commercial	$	12	$	5
Real estate construction	3		—
Commercial mortgage	3		8
International	—		3
Total business loans	18		16
Retail loans:
Residential mortgage	3		2
Other consumer	4		5
Total retail loans	7		7
Total loans past due 90 days or more and still accruing	$	25	$	23

Loans past due 90 days or more and still accruing interest generally represent loans that are well collateralized and in a continuing process of collection. Loans past due 30-89 days increased $16 million to $174 million at September 30, 2013, compared to $158 million at December 31, 2012.

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The following table presents a summary of total internal watch list loans. Watch list loans with balances of $2 million or more on nonaccrual status or whose terms have been modified in a TDR are individually subjected to quarterly credit quality reviews, and the Corporation may establish specific allowances for such loans.

(dollar amounts in millions)	September 30, 2013			June 30, 2013			December 31, 2012
Total watch list loans	$	2,676		$	2,886		$	3,088
As a percentage of total loans	6.1		%	6.5		%	6.7		%

The following table presents a summary of foreclosed property by property type.

(in millions)	September 30, 2013		June 30, 2013		December 31, 2012
Construction, land development and other land	$	7	$	8	$	16
Single family residential properties	8		9		19
Other non-land, nonresidential properties	4		9		12
Other assets	—		$	3	7
Total foreclosed property	$	19	$	29	$	54

At September 30, 2013, foreclosed property totaled $19 million and consisted of approximately 94 properties, compared to $54 million and approximately 149 properties at December 31, 2012.

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

	Three Months Ended
(in millions)	September 30, 2013			June 30, 2013			December 31, 2012
Balance at beginning of period	$	29		$	40		$	63
Acquired in foreclosure	2			4			11
Write-downs	(1		)	(7		)	(3		)
Foreclosed property sold (a)	(11		)	(8		)	(17		)
Balance at end of period	$	19		$	29		$	54
(a) Net gain on foreclosed property sold	$	—		$	3		$	4

At September 30, 2013, there were no foreclosed properties with carrying values greater than $2 million, compared to 6 foreclosed properties totaling $27 million at December 31, 2012.

For further information regarding the Corporation's nonperforming assets policies and impaired loans, refer to Note 1 and Note 4 to the consolidated financial statements.

Commercial and Residential Real Estate Lending

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

(in millions)	September 30, 2013		December 31, 2012
Real estate construction loans:
Commercial Real Estate business line (a)	$	1,283	$	1,049
Other business lines (b)	269		191
Total real estate construction loans	$	1,552	$	1,240
Commercial mortgage loans:
Commercial Real Estate business line (a)	$	1,592	$	1,873
Other business lines (b)	7,193		7,599
Total commercial mortgage loans	$	8,785	$	9,472

(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 limiting exposure to those 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 $10.3 billion at September 30, 2013, of which $2.9 billion, or 28 percent, were to borrowers in the Commercial Real Estate business line, which includes loans to real estate developers. The remaining $7.4 billion, or 72 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 totaled $1.6 billion at September 30, 2013. The real estate construction loan portfolio primarily contains loans made to long-time customers with satisfactory completion experience. Of the $1.3 billion of

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real estate construction loans in the Commercial Real Estate business line, $24 million were on nonaccrual status at September 30, 2013 and net recoveries were $1 million for the nine months ended September 30, 2013. In other business lines, $1 million of real estate construction loans were on nonaccrual status at September 30, 2013.

The commercial mortgage loan portfolio totaled $8.7 billion at September 30, 2013 and included $1.6 billion in the Commercial Real Estate business line and $7.1 billion in other business lines. Loans in the commercial mortgage portfolio generally mature within three to five years. Of the $1.6 billion of commercial mortgage loans in the Commercial Real Estate business line, $67 million were on nonaccrual status at September 30, 2013. Commercial mortgage loan net charge-offs in the Commercial Real Estate business line were $7 million for the nine months ended September 30, 2013. In other business lines, $139 million of commercial mortgage loans were on nonaccrual status at September 30, 2013, and net charge-offs were $9 million for the nine months ended September 30, 2013.

The geographic distribution and project type of commercial real estate loans are important factors in diversifying credit risk within the portfolio. The following table reflects real estate construction and commercial mortgage loans to borrowers in the Commercial Real Estate business line by project type and location of property.

	September 30, 2013
	Location of Property														December 31, 2012
(dollar amounts in millions) Project Type:	California		Michigan		Texas		Florida		Other		Total		% of Total		Total		% of Total
Real estate construction loans:
Commercial Real Estate business line:
Residential:
Single family	$	118	$	8	$	24	$	—	$	15	$	165	13	%	$	156	15	%
Land development	64		2		2		—		—		68		5		44		4
Total residential	182		10		26		—		15		233		18		200		19
Other construction:
Multi-family	309		—		292		18		38		657		52		406		39
Retail	46		4		88		1		—		139		11		182		17
Office	105		—		18		—		9		132		10		121		12
Commercial	17		1		24		—		—		42		3		40		4
Multi-use	—		8		2		—		4		14		1		43		4
Land development	3		—		5		—		—		8		1		25		2
Other	6		11		—		2		25		44		3		6		1
Other real estate construction loans (a)	—		—		14		—		—		14		1		26		2
Total	$	668	$	34	$	469	$	21	$	91	$	1,283	100	%	$	1,049	100	%
Commercial mortgage loans:
Commercial Real Estate business line:
Residential:
Land carry	$	70	$	24	$	25	$	13	$	13	$	145	9	%	$	143	8	%
Single family	23		2		4		3		1		33		2		48		2
Total residential	93		26		29		16		14		178		11		191		10
Other commercial mortgage:
Multi-family	185		33		81		70		3		372		22		376		20
Retail	96		98		51		22		28		295		19		368		20
Office	93		34		36		—		8		171		11		193		10
Commercial	80		25		13		1		23		142		9		167		9
Multi-use	103		7		—		—		10		120		8		161		9
Land carry	39		7		14		7		5		72		5		122		6
Other	52		2		27		—		4		85		5		69		4
Other commercial mortgage loans (a)	19		1		135		2		—		157		10		226		12
Total	$	760	$	233	$	386	$	118	$	95	$	1,592	100	%	$	1,873	100	%

(a) Acquired loans for which complete information related to project type is not available.

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

	September 30, 2013								December 31, 2012
(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	$	428	26	%	$	818	54	%	$	433	28	%	$	871	57	%
California	658		40		420		28		523		35		404		26
Texas	330		20		222		15		320		21		212		14
Other Markets	234		14		41		3		251		16		50		3
Total	$	1,650	100	%	$	1,501	100	%	$	1,527	100	%	$	1,537	100	%

Residential real estate loans, which consist of traditional residential mortgages and home equity loans and lines of credit, totaled $3.2 billion at September 30, 2013. Residential mortgages totaled $1.7 billion at September 30, 2013, and were primarily larger, variable-rate mortgages originated and retained for certain private banking relationship customers. Of the $1.7 billion of residential mortgage loans outstanding, $63 million were on nonaccrual status at September 30, 2013. The home equity portfolio totaled $1.5 billion at September 30, 2013, of which $1.4 billion was outstanding under primarily variable-rate, interest-only home equity lines of credit and $114 million were closed-end home equity loans. Of the $1.5 billion of home equity loans outstanding, $34 million were on nonaccrual status at September 30, 2013. A majority of the home equity portfolio was secured by junior liens at September 30, 2013. 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. Such loans are charged off to current appraised values less costs to sell no later than 180 days past due.

Shared National Credits

Shared National Credit (SNC) loans are facilities greater than $20 million shared by three or more federally supervised financial institutions that are reviewed annually by regulatory authorities at the agent bank level. The Corporation generally seeks to obtain ancillary business at the origination of a SNC relationship. Loans classified as SNC loans (approximately 870 borrowers at September 30, 2013) were $9.2 billion and $9.4 billion at September 30, 2013 and December 31, 2012, respectively. Comerica Bank (the Bank) was the agent for $1.6 billion of the SNC loans outstanding at both September 30, 2013 and December 31, 2012. SNC net loan charge-offs totaled zero and $8 million for the three- and nine-month periods ended September 30, 2013, respectively, compared to $2 million and $20 million for the three- and nine-month periods ended September 30, 2012, respectively. Nonaccrual SNC loans decreased $13 million to $11 million at September 30, 2013, compared to $24 million at December 31, 2012. SNC loans, diversified by both business line and geographic market, comprised approximately 20 percent of total loans at both September 30, 2013 and December 31, 2012. SNC loans are held to the same credit underwriting and pricing standards as the remainder of the loan portfolio.

Energy Lending

The Corporation has a portfolio of energy-related loans that are included primarily in "commercial loans" in the consolidated balance sheets. The Corporation has over 30 years of experience in energy lending, with a focus on middle market companies. Loans in the Middle Market - Energy business line were $2.8 billion and $3.0 billion at September 30, 2013 and December 31, 2012, respectively, or approximately 6 percent of total loans each period. Nonaccrual Middle Market - Energy loans totaled $1 million and $3 million at September 30, 2013 and December 31, 2012, respectively. Middle Market - Energy net loan charge-offs were zero for both the three-month periods ended September 30, 2013 and 2012 and totaled $2 million for both the nine-month periods ended September 30, 2013 and 2012. Energy loans are diverse in nature, with outstanding balances by customer market segment distributed approximately as follows at September 30, 2013: 72 percent exploration and production (comprised of approximately 49 percent oil, 29 percent mixed and 22 percent natural gas), 13 percent midstream and 15 percent energy services.

Automotive Lending

Substantially all dealer loans are in the National Dealer Services business line. Loans in the National Dealer Services business line include floor plan financing and other loans to automotive dealerships. Floor plan loans, included in “commercial loans” in the consolidated balance sheets, totaled $2.9 billion at September 30, 2013, a decrease of $94 million compared to December 31, 2012. At September 30, 2013, other loans to automotive dealers in the National Dealer Services business line totaled $2.0 billion, including $1.4 billion of owner-occupied commercial real estate mortgage loans, compared to $2.2 billion of other loans to automotive dealers in the National Dealer Service line, including $1.5 billion of owner-occupied commercial real estate mortgage loans, at December 31, 2012. Automotive lending also includes loans to borrowers involved with automotive production, primarily Tier 1 and Tier 2 suppliers. Loans to borrowers involved with automotive production totaled approximately $1.2 billion at both September 30, 2013 and December 31, 2012.

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State and Local Municipalities

In the normal course of business, the Corporation serves the needs of state and local municipalities in multiple capacities, including traditional banking products such as deposit services, loans and letters of credit, investment banking services such as bond underwriting and private placements, and by investing in municipal securities.

The following table summarizes the Corporation's direct exposure to state and local municipalities as of September 30, 2013 and December 31, 2012.

(in millions)	September 30, 2013		December 31, 2012
Loans outstanding	$	52	$	53
Lease financing	339		359
Investment securities available-for-sale	25		23
Trading account securities	2		19
Standby letters of credit	98		108
Unused commitments to extend credit	13		24
Total direct exposure to state and local municipalities	$	529	$	586

Indirect exposure comprised $114 million in auction-rate preferred securities collateralized by municipal securities at September 30, 2013, compared to $127 million at December 31, 2012. Additionally, the Corporation is exposed to Automated Clearing House (ACH) transaction risk for those municipalities utilizing this electronic payment and/or deposit method and similar products in their cash flow management. The Corporation sets limits on ACH activity during the underwriting process.

Extensions of credit to state and local municipalities are subjected to the same underwriting standards as other business loans. At both September 30, 2013 and December 31, 2012, all outstanding municipal loans and leases were performing according to contractual terms, and one municipal lease was included in the Corporation's internal watch list. Municipal leases are secured by the underlying equipment, and a substantial majority of the leases are fully defeased with AAA-rated U.S. government securities. Substantially all municipal investment securities available-for sale are auction-rate securities. All auction-rate securities are reviewed quarterly for other-than-temporary impairment. All auction-rate municipal securities were rated investment grade, and all auction-rate preferred securities collateralized by municipal securities were rated investment grade and were adequately collateralized at both September 30, 2013 and December 31, 2012. Municipal securities are held in the trading account for resale to customers. In addition, Comerica Securities, a broker-dealer subsidiary of the Bank, underwrites bonds issued by municipalities. All bonds underwritten by Comerica Securities are sold to third party investors.

On July 18, 2013, the city of Detroit filed for Chapter 9 bankruptcy protection in federal court. The Corporation's direct exposure to the city of Detroit is insignificant.

International Exposure

International assets are subject to general risks inherent in the conduct of business in foreign countries, including economic uncertainties and each foreign government's regulations. Risk management practices minimize the risk inherent in international lending arrangements. These practices include structuring bilateral agreements or participating in bank facilities, which secure repayment from sources external to the borrower's country. Accordingly, such international outstandings are excluded from the cross-border risk of that country.

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The Corporation does not hold any sovereign exposure to Europe. The Corporation's international strategy as it pertains to Europe is to focus on European companies doing business in North America, with an emphasis on the Corporation's primary geographic markets. The following table summarizes cross-border exposure to entities domiciled in European countries at September 30, 2013 and December 31, 2012.

	Outstanding (a)
(in millions)	Commercial and Industrial		Banks and Other Financial Institutions		Total Outstanding		Unfunded Commitments and Guarantees		Total Exposure
September 30, 2013
United Kingdom	$	75	$	4	$	79	$	166	$	245
Netherlands	64		—		64		83		147
Germany	4		4		8		49		57
Ireland	—		—		—		30		30
Luxembourg	3		—		3		17		20
Belgium	2		—		2		18		20
Switzerland	3		13		16		3		19
Sweden	5		—		5		14		19
Italy	5		1		6		6		12
France	—		2		2		1		3
Poland	—		2		2		—		2
Spain	2		—		2		—		2
Total Europe	$	163	$	26	$	189	$	387	$	576
December 31, 2012
United Kingdom	$	110	$	10	$	120	$	149	$	269
Netherlands	61		—		61		72		133
Germany	2		3		5		49		54
Ireland	18		—		18		12		30
Switzerland	13		7		20		2		22
Luxembourg	1		—		1		19		20
Sweden	9		—		9		10		19
Belgium	2		—		2		15		17
Italy	6		1		7		—		7
Spain	2		—		2		—		2
France	—		3		3		—		3
Total Europe	$	224	$	24	$	248	$	328	$	576

(a) Includes funded loans, bankers acceptances and net counterparty derivative exposure.

For further discussion of credit risk, see the "Credit Risk" section of pages F-23 through F-35 in the Corporation's 2012 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, and commodity and equity prices. Liquidity risk represents the failure to meet financial obligations coming due resulting from an inability to liquidate assets or obtain adequate funding, and the inability to easily unwind or offset specific exposures without significant changes in pricing, due to inadequate market depth or market disruptions.

The Asset and Liability Policy Committee (ALCO) of the Corporation establishes and monitors compliance with the policies and risk limits pertaining to market and liquidity risk management activities. ALCO meets regularly to discuss and review market and liquidity risk management strategies, and consists of executive and senior management from various areas of the Corporation, including treasury, finance, economics, lending, deposit gathering and risk management.

The Corporation's Treasury Department supports ALCO in measuring, monitoring and managing interest rate, liquidity and coordination of all other market risks. The area's key activities encompass: (i) providing information and analysis of the Corporation's balance sheet structure and measurement of interest rate, liquidity and all other market risks; (ii) monitoring and reporting of the Corporation's positions relative to established policy limits and guidelines; (iii) development and presentation of analysis and strategies to adjust risk positions; (iv) review and presentation of policies and authorizations for approval; (v) monitoring of industry trends and analytical tools to be used in the management of interest rate, liquidity and all other market risks; (vi) developing and monitoring the interest rate risk economic capital estimate; and (vii) monitoring of capital adequacy in accordance with the Capital Management Policy.

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Interest Rate Risk

Net interest income is the primary source of revenue for the Corporation. Interest rate risk arises primarily through the Corporation's core business activities of extending loans and accepting deposits. The Corporation's balance sheet is predominantly characterized by floating-rate loans funded by a combination of core deposits and wholesale borrowings. Approximately 85 percent of the Corporation's loans were floating at September 30, 2013, of which approximately 75 percent were based on LIBOR and 25 percent were based on Prime. This creates a natural imbalance between the floating-rate loan portfolio and the more slowly repricing deposit products. The result is that growth and/or contraction in the Corporation's core businesses may lead to sensitivity to interest rate movements in the absence of mitigating actions. Examples of such actions are purchasing investment securities, primarily fixed-rate, which provide liquidity to the balance sheet and act to mitigate the inherent interest sensitivity, and hedging the sensitivity with interest rate swaps. The Corporation actively manages its exposure to interest rate risk, with the principal objective of optimizing net interest income and the economic value of equity while operating within acceptable limits established for interest rate risk and maintaining adequate levels of funding and liquidity.

The Corporation frequently evaluates net interest income under various balance sheet and interest rate scenarios, looking at a 12-month time horizon, using simulation modeling analysis as its principal risk management evaluation technique. The results of this analysis provides the information needed to assess the balance sheet structure. Changes in economic activity, whether domestic or international, different from the changes management included in its simulation analysis could translate into a materially different interest rate environment than currently expected. Management evaluates a base case net interest income under an unchanged interest rate environment and what is believed to be the most likely balance sheet structure. This base case net interest income is then evaluated against non-parallel interest rate scenarios that increase and decrease 200 basis points in a linear fashion from the base case over 12 months, resulting in an average change in interest rates of 100 basis points over the period. Due to the current low level of interest rates, the analysis reflects a declining interest rate scenario of a 25 basis point drop, to zero percent. In addition, consistent with each interest rate scenario, adjustments are made to assumptions regarding asset prepayment levels, yield curves, and overall balance sheet mix and growth. These assumptions are inherently uncertain and, as a result, the model may not precisely predict the impact of higher or lower interest rates on net interest income. Actual results may differ from simulated results due to timing, magnitude and frequency of changes in interest rates, market conditions and management strategies, among other factors. However, the model can indicate the likely direction of change. Existing derivative instruments entered into for risk management purposes are included in the analysis, but no additional hedging is forecasted.

The table below, as of September 30, 2013 and December 31, 2012, 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. The sensitivity increased from December 31, 2012 to September 30, 2013 primarily due to higher forecasted core deposits, which generate higher forecasted excess reserves and, therefore, increased sensitivity. The risk to declining interest rates is limited as a result of the inability of the current low level of rates to fall significantly.

Sensitivity of Net Interest Income to Changes in Interest Rates

	September 30, 2013					December 31, 2012
(in millions)	Amount			%		Amount			%
Change in Interest Rates:
+200 basis points	$	210		13	%	$	178		11	%
-25 basis points (to zero percent)	(32		)	(2	)	(23		)	(1	)

Corporate policy limits adverse change to no more than four percent of management's base case net interest income forecast, and the Corporation was within this policy guideline at September 30, 2013. Interest rate risk is actively managed principally through the use of either on-balance sheet financial instruments or interest rate derivatives to achieve the desired risk profile.

In addition to the simulation analysis, an economic value of equity analysis is performed for a longer term view of the interest rate risk position. The economic value of equity analysis begins with an estimate of the economic value of the financial assets, liabilities and off-balance sheet instruments on the Corporation's balance sheet, derived through discounting cash flows based on actual rates at the end of the period. Next, the estimated impact of rate movements is applied to the economic value of assets, liabilities and off-balance sheet instruments. The economic value of equity is then calculated as the difference between the estimated market value of assets and liabilities net of the impact of off-balance sheet instruments. As with net interest income simulation analysis, a variety of alternative scenarios are performed to measure the impact on economic value of equity, including changes in the level, slope and shape of the yield curve.

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The table below, as of September 30, 2013 and December 31, 2012, displays the estimated impact on the economic value of equity from a 200 basis point immediate parallel increase or decrease in interest rates. Similar to the simulation analysis above, due to the current low level of interest rates, the economic value of equity analyses below reflect an interest rate scenario of an immediate 25 basis point drop, to zero percent, while the rising interest rate scenario reflects an immediate 200 basis point rise. The change in the sensitivity of the economic value of equity to a 200 basis point parallel increase in rates between December 31, 2012 and September 30, 2013 was primarily driven by changes in market interest rates at the middle to long end of the curve, which most significantly impact the value of deposits without a stated maturity. Additionally, a decrease in the Corporation's mortgage-backed securities portfolio reduced the level of fixed-rate securities that would decline in value when interest rates move higher.

Sensitivity of Economic Value of Equity to Changes in Interest Rates

	September 30, 2013					December 31, 2012
(in millions)	Amount			%		Amount			%
Change in Interest Rates:
+200 basis points	$	652		6	%	$	1,031		10	%
-25 basis points (to zero percent)	(190		)	(2	)	(192		)	(2	)

Wholesale Funding

The Corporation may access the purchased funds market when necessary, which includes foreign office time deposits and short-term borrowings. Capacity for incremental purchased funds at September 30, 2013 included the ability to purchase federal funds, sell securities under agreements to repurchase, as well as issue deposits to institutional investors and issue certificates of deposit through brokers. Purchased funds totaled $717 million at September 30, 2013, compared to $612 million at December 31, 2012.

The Bank is a member of the Federal Home Loan Bank of Dallas, Texas (FHLB), 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 September 30, 2013, $13 billion of real estate-related loans were pledged to the FHLB as blanket collateral for current and potential future borrowings. As of September 30, 2013, the Corporation had $1.0 billion of outstanding borrowings from the FHLB maturing in May 2014.

Additionally, the Bank had the ability to issue up to $15.0 billion of debt at September 30, 2013 under an existing $15 billion medium-term senior note program which allows the issuance of debt with maturities between three months and 30 years. The Corporation also maintains a shelf registration statement with the Securities and Exchange Commission from which it may issue debt and/or equity securities.

The ability of the Corporation and the Bank to raise funds at competitive rates is impacted by rating agencies' views of the credit quality, liquidity, capital and earnings of the Corporation and the Bank. As of September 30, 2013, the four major rating agencies had assigned the following ratings to long-term senior unsecured obligations of the Corporation and the Bank. A security rating is not a recommendation to buy, sell, or hold securities and may be subject to revision or withdrawal at any time by the assigning rating agency. Each rating should be evaluated independently of any other rating.

	Comerica Incorporated		Comerica Bank
September 30, 2013	Rating	Outlook	Rating	Outlook
Standard and Poor’s	A-	Stable	A	Stable
Moody’s Investors Service	A3	Stable	A2	Stable
Fitch Ratings (a)	A	Negative	A	Negative
DBRS	A	Stable	A (High)	Stable

(a) In October 2013, Fitch Ratings revised the Corporation's outlook to "Stable" from "Negative".

The Corporation satisfies liquidity requirements with either liquid assets or various funding sources. Liquid assets, which totaled $13.8 billion at September 30, 2013, compared to $12.1 billion at December 31, 2012, provide a reservoir of liquidity. Liquid assets include cash and due from banks, federal funds sold, interest-bearing deposits with banks, other short-term investments and unencumbered investment securities available-for-sale. At September 30, 2013, the Corporation held excess liquidity, represented by $5.6 billion deposited with the FRB, compared to $2.9 billion at December 31, 2012.

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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 2012 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, 2012, the most critical of these significant accounting policies were the policies related to the allowance for credit losses, valuation methodologies, 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-42 through F-47 in the Corporation's 2012 Annual Report. As of the date of this report, there have been no significant changes to the Corporation's critical accounting policies, except as discussed below.

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 loan losses includes specific allowances, based on individual evaluations of certain loans, and allowances for homogeneous pools of loans with similar risk characteristics.

The allowance for business loans which do not meet the criteria to be evaluated individually is determined by applying standard reserve factors to the pool of business loans within each internal risk rating. In the first quarter 2013, the Corporation enhanced the approach utilized for determining standard reserve factors by changing from a dollar-based migration method for developing probability of default statistics to a count-based method. Under the dollar-based method, each dollar that moved to default received equal weight in the determination of standard reserve factors for each internal risk rating. Under the count-based approach, each loan that moves to default receives equal weighting. The change resulted in a $40 million increase to the allowance for loan losses at March 31, 2013.

For further discussion of the methodology used in the determination of the allowance for credit losses, refer to the “Allowance for Credit Losses” section in this financial review and Note 1 to the unaudited consolidated financial statements.

Goodwill

Goodwill is initially recorded as the excess of the purchase price over the fair value of net assets acquired in a business combination and is subsequently evaluated at least annually for impairment. Goodwill impairment testing is performed at the reporting unit level, equivalent to a business segment or one level below. The Corporation has three reporting units: the Business Bank, the Retail Bank and Wealth Management. At September 30, 2013 and December 31, 2012, goodwill totaled $635 million, including $380 million allocated to the Business Bank, $194 million allocated to the Retail Bank and $61 million allocated to Wealth Management.

The Corporation performs its annual evaluation of goodwill impairment in the third quarter of each year and on an interim basis if events or changes in circumstances between annual tests suggest additional testing may be warranted to determine if goodwill might be impaired. The goodwill impairment test is a two-step test. The first step of the goodwill impairment test compares the estimated fair value of identified reporting units with their carrying amount, including goodwill. If the estimated fair value of the reporting unit is less than the carrying value, the second step must be performed to determine the implied fair value of the reporting unit's goodwill and the amount of goodwill impairment, if any. The implied fair value of goodwill is determined as if the reporting unit were being acquired in a business combination. If the implied fair value of goodwill exceeds the goodwill assigned to the reporting unit, there is no impairment. If the goodwill assigned to a reporting unit exceeds the implied fair value of goodwill, an impairment charge is recorded for the excess.

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

Determining the fair value of reporting units is a subjective process involving the use of estimates and judgments related to the selection of inputs such as future cash flows, discount rates, comparable public company multiples, applicable control premiums and economic expectations used in determining the interest rate environment. The estimated fair values of the reporting units are determined using a blend of two commonly used valuation techniques: the market approach and the income approach. For the market approach, valuations of reporting units consider a combination of earnings, equity and other multiples from companies with characteristics similar to the reporting unit. Since the fair values determined under the market approach are representative of noncontrolling interests, the valuations accordingly incorporate a control premium. For the income approach,

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estimated future cash flows and terminal value are discounted. Estimated future cash flows are derived from internal forecasts and economic expectations for each reporting unit which incorporate uncertainty factors inherent to long-term projections. The applicable discount rate is based on the imputed cost of equity capital appropriate for each reporting unit, which incorporates the risk-free rate of return, the level of non-diversified risk associated with companies with characteristics similar to the reporting unit, a size risk premium and a market equity risk premium.

The annual test of goodwill impairment was performed as of the beginning of the third quarter 2013. The Corporation's assumptions included maintaining the low Federal funds target rate through mid-2015 with modest increases thereafter until eventually reaching a normal interest rate environment. At the conclusion of the first step of the annual goodwill impairment tests performed in the third quarter 2013, the estimated fair values of all reporting units substantially exceeded their carrying amounts, including goodwill. The results of the annual test of the goodwill impairment test for each reporting unit were subjected to stress testing as appropriate.

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

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SUPPLEMENTAL FINANCIAL DATA

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)	September 30, 2013			December 31, 2012
Tier 1 Common Capital Ratio:
Tier 1 and Tier 1 common capital (a) (b)	$	6,863		$	6,705
Risk-weighted assets (a) (b)	63,917			66,115
Tier 1 and Tier 1 common risk-based capital ratio (b)	10.74		%	10.14		%
Basel III Tier 1 Common Capital Ratio:
Tier 1 and Tier 1 common capital (b)	$	6,863		$	6,705
Basel III adjustments (c)	—			(39		)
Basel III Tier 1 and Tier 1 common capital (c)	$	6,863		$	6,253
Risk-weighted assets (a) (b)	$	63,917		$	66,115
Basel III adjustments (c)	2,295			1,854
Basel III risk-weighted assets (c)	$	66,212		$	67,969
Tier 1 and Tier 1 common capital ratio (b)	10.7		%	10.1		%
Basel III Tier 1 and Tier 1 common capital ratio (c)	10.4			9.8
Tangible Common Equity Ratio:
Common shareholders' equity	$	6,969		$	6,942
Less:
Goodwill	635			635
Other intangible assets	18			22
Tangible common equity	$	6,316		$	6,285
Total assets	$	64,670		$	65,069
Less:
Goodwill	635			635
Other intangible assets	18			22
Tangible assets	$	64,017		$	64,412
Common equity ratio	10.78		%	10.67		%
Tangible common equity ratio	9.87			9.76
Tangible Common Equity per Share of Common Stock:
Common shareholders' equity	$	6,969		$	6,942
Tangible common equity	6,316			6,285
Shares of common stock outstanding (in millions)	184			188
Common shareholders' equity per share of common stock	$	37.94		$	36.87
Tangible common equity per share of common stock	34.38			33.38

(a) Tier 1 capital and risk-weighted assets as defined by regulation.

(b) September 30, 2013 Tier 1 capital and risk-weighted-assets are estimated.

(c) Estimated ratios based on the standardized approach in the final rule for the U.S. adoption of the Basel III regulatory capital framework, excluding most elements of AOCI.

The Tier 1 common capital ratio removes preferred stock and qualifying trust preferred securities from Tier 1 capital as defined by and calculated in conformity with bank regulations. The Basel III Tier 1 common capital ratio further adjusts Tier 1 common capital and risk-weighted assets to account for the final rule approved by U.S. banking regulators in July 2013 for the U.S. adoption of the Basel III regulatory capital framework. The final Basel III capital rules are effective January 1, 2015 for banking organizations subject to the standardized approach. The tangible common equity ratio removes preferred stock and the effect of intangible assets from capital and the effect of intangible assets from total assets and tangible common equity per share of common stock removes the effect of intangible assets from common shareholders' equity per share of common stock. The Corporation believes these measurements are meaningful measures of capital adequacy used by investors, regulators, management and others to evaluate the adequacy of common equity and to compare against other companies in the industry.

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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

There 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, 2012 in response to Part I, Item 1A. of such Form 10-K, other than as amended in our Form 10-Q for the quarterly period ended June 30, 2013 in response to Part II, Item 1A. of such Form 10-Q. Such risk factors are incorporated herein by reference.

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.

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ITEM 6. Exhibits

Exhibit No.	Description
3.1	Restated Certificate of Incorporation of Comerica Incorporated (filed as Exhibit 3.2 to Registrant's Current Report on Form 8-K dated August 4, 2010, and incorporated herein by reference).
3.2	Certificate of Amendment to Restated Certificate of Incorporation of Comerica Incorporated (filed as Exhibit 3.2 to Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2011, and incorporated herein by reference).
3.3	Amended and Restated Bylaws of Comerica Incorporated (filed as Exhibit 3.3 to Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2011, and incorporated herein by reference).
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†	Comerica Incorporated Amended and Restated Employee Stock Purchase Plan (amended and restated October 22, 2013)
31.1	Chairman, President and CEO Rule 13a-14(a)/15d-14(a) Certification of Periodic Report (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002).
31.2	Vice Chairman and CFO Rule 13a-14(a)/15d-14(a) Certification of Periodic Report (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002).
32	Section 1350 Certification of Periodic Report (pursuant to Section 906 of the Sarbanes-Oxley Act of 2002).
101	Financial statements from Quarterly Report on Form 10-Q of the Registrant for the quarter ended September 30, 2013, formatted in Extensible Business Reporting Language: (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Comprehensive Income, (iii) the Consolidated Statements of Changes in Shareholders' Equity, (iv) the Consolidated Statements of Cash Flows and (v) the Notes to Consolidated Financial Statements.
†	Management contract or compensatory plan or arrangement.

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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/ Muneera S. Carr

Muneera S. Carr

Executive Vice President and

Chief Accounting Officer and

Duly Authorized Officer

Date: October 29, 2013

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EXHIBIT INDEX

Exhibit No.	Description
3.1	Restated Certificate of Incorporation of Comerica Incorporated (filed as Exhibit 3.2 to Registrant's Current Report on Form 8-K dated August 4, 2010, and incorporated herein by reference).
3.2	Certificate of Amendment to Restated Certificate of Incorporation of Comerica Incorporated (filed as Exhibit 3.2 to Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2011, and incorporated herein by reference).
3.3	Amended and Restated Bylaws of Comerica Incorporated (filed as Exhibit 3.3 to Registrant's Quarterly Report on Form 10-Q for the quarter ended March 31, 2011, and incorporated herein by reference).
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†	Comerica Incorporated Amended and Restated Employee Stock Purchase Plan (amended and restated October 22, 2013)
31.1	Chairman, President and CEO Rule 13a-14(a)/15d-14(a) Certification of Periodic Report (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002)
31.2	Vice Chairman and CFO Rule 13a-14(a)/15d-14(a) Certification of Periodic Report (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002)
32	Section 1350 Certification of Periodic Report (pursuant to Section 906 of the Sarbanes-Oxley Act of 2002)
101	Financial statements from Quarterly Report on Form 10-Q of the Registrant for the quarter ended September 30, 2013, formatted in Extensible Business Reporting Language: (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Comprehensive Income, (iii) the Consolidated Statements of Changes in Shareholders' Equity, (iv) the Consolidated Statements of Cash Flows and (v) the Notes to Consolidated Financial Statements.
†	Management contract or compensatory plan or arrangement.

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EX-10.1

Exhibit 10.1

Original Plan approved by the Compensation Committee on 11/15/96

Amended and Restated Plan (prior version) approved and ratified by the Compensation Committee on 3/22/04

Amended and Restated Plan (prior version) approved and ratified by the Board of Directors on 3/23/04

Amended and Restated Plan (prior version) approved and ratified by the Stockholders on 5/18/04

Amended and Restated Plan (prior version) approved by the Governance, Compensation and Nominating

Committee and the Board of Directors on 11/1/08

Amended and Restated Plan (prior version) approved by the Governance, Compensation and Nominating Committee and the Board of Directors on 11/16/10

Amended and Restated Plan (prior version) approved by the Governance, Compensation and Nominating Committee and the Board of Directors on 11/15/11

This Amended and Restated Plan approved by the Governance, Compensation and Nominating Committee on 8/30/13 and the Board of Directors on 9/24/13, to be effective as of 10/22/13

COMERICA INCORPORATED

AMENDED AND RESTATED

EMPLOYEE STOCK PURCHASE

PLAN

(AMENDED AND RESTATED EFFECTIVE OCTOBER 22, 2013)

COMERICA INCORPORATED

AMENDED AND RESTATED

EMPLOYEE STOCK PURCHASE PLAN

TABLE OF CONTENTS

SECTION I – PURPOSE	1
SECTION II – DEFINITIONS	1
SECTION III – INTRODUCTION	4
SECTION IV – PARTICIPATION	5
SECTION V – CONTRIBUTIONS	5
SECTION VI – ACQUISITION OF CORPORATION SHARES	8
SECTION VII – RIGHTS WITH RESPECT TO SHARES HELD IN PLAN	8
SECTION VIII – WITHDRAWALS FROM PLAN	8
SECTION IX – MISCELLANEOUS PROVISIONS	10
SECTION X – EFFECTIVE DATE OF PLAN	11

SECTION I - PURPOSE

The Board of Directors of Comerica Incorporated (the “Corporation”) believes that the interests of the Corporation are served through share ownership of the Corporation by its employees. Such ownership strengthens the sense of identity between the Corporation and its employees and furthers a unity of purpose among the Corporation, its employees and its stockholders. It is the purpose of this Comerica Incorporated Amended and Restated Employee Stock Purchase Plan to provide a convenient means through which employees of the Corporation and its subsidiaries and affiliates may acquire shares in the Corporation.

SECTION II - DEFINITIONS

Whenever used in the Plan, the following terms shall have the meanings set forth below.

A. “Account” means an account established for each Participant under the Plan to hold Corporation Shares acquired for the Participant’s account with Payroll Withholding Contributions, Other Permitted Contributions, Service Award Contributions, Matching Contributions, Share Retention Contributions and/or Reinvested Cash Dividends.

B. “Beneficiary(ies)” means the individual(s) to whom the balance of the Participant’s Account is to be distributed in the event assets remain in such Account at the time of the Participant’s death, or by whom any rights of the Participant, after the Participant’s death, may be exercised.

C. “Beneficiary Designation Form” means the form (which may include an online electronic form) used to designate the Participant’s Beneficiary(ies), as such form may be modified by the Committee or the Plan Administrator from time to time.

D. “Bi-Weekly Base Pay” means the gross amount of cash compensation a Participant receives during each bi-weekly pay period, including, without limitation, base pay, incentive compensation paid through a specific business unit incentive plan, referral awards, ROAR payments, overtime, shift differential and commissions, lump sum merit bonuses (effective as of January 22, 1999) and/or such other payments as the Committee or the Plan Administrator may determine appropriate from time to time for such purposes. Bi-Weekly Base Pay shall not include any amount which is deferred under the Deferred Compensation Plan(s) or paid through the Management Incentive Plan.

E. “Board” means the Board of Directors of Comerica Incorporated.

F. “Committee” means the committee appointed by the Board to administer the Plan as provided herein. Unless otherwise determined by the Board, the Governance, Compensation and Nominating Committee of the Board shall be the Committee.

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G. “Corporation” means Comerica Incorporated, a Delaware corporation. For purposes of Plan provisions relating to eligibility to participate or receive or make contributions, it shall also include subsidiaries and affiliates of the Corporation.

H. “Corporation Shares” means shares of $5.00 par value common stock of the Corporation.

I. “Custodian Bank” means such institution as may be appointed by the Corporation to hold Corporation Shares in Accounts of Participants under the Plan.

J. “Deferred Compensation Plan(s)” means the 1999 Comerica Incorporated Amended and Restated Deferred Compensation Plan, together with any and all amendments, restatements and/or modifications thereof, and/or the 1999 Comerica Incorporated Amended and Restated Common Stock Deferred Incentive Award Plan, together with any and all amendments, restatements and/or modifications thereof, or any plan adopted by the Corporation as a successor to the foregoing.

K. “Disability” has the meaning set forth in Section V(D) hereof.

L. “Employee” means an individual who renders service to the Corporation or one of its subsidiaries or affiliates as a common law employee or officer.

M. “Exchange Act” means the Securities Exchange Act of 1934, as amended.

N. “Management Incentive Plan” means the Comerica Incorporated 2011 Management Incentive Plan, together with any and all amendments, restatements and/or modifications thereof, or any plan adopted by the Corporation as a successor to the foregoing.

O. “Matching Contribution” means, subject to the limitations of Section V(C) hereof, a contribution by the Corporation, the gross amount of which shall equal 15% of the aggregate amount of Payroll Withholding Contributions, Service Award Contributions and/or Other Permitted Contributions made during the previous quarter. The Matching Contribution, net of all applicable withholding and deductions, shall be used to purchase Corporation Shares, except as set forth in Section VIII(B).

P. “Other Permitted Contribution” means a non-periodic contribution of a Participant to the Plan pursuant to guidelines approved by the Committee or the Plan Administrator from time to time.

Q. “Participant” means an Employee or former Employee who has an Account under the Plan.

R. “Payroll Withholding Contribution” means a contribution of a Participant under the Plan equal to the percentage of the Participant’s gross Bi-Weekly Base Pay such Participant has elected to contribute to the Plan; provided, however, that in the event the Participant’s pay,

2

less all applicable withholding and deductions, is less than the amount of his or her elected contribution, the contribution shall be reduced so as not to exceed 100% of the Participant’s net pay. Payroll Withholding Contributions shall be withheld by the Corporation and forwarded to the Custodian Bank, which shall utilize such contributions to purchase Corporation Shares for allocation to the Employee’s Account in accordance with the provisions of the Plan.

S. “Plan” means the Comerica Incorporated Amended and Restated Employee Stock Purchase Plan, as set forth herein and as hereinafter amended and/or restated from time to time.

T. “Plan Administrator” means, unless determined otherwise by the Board or the Committee, the Chief Human Resources Officer (or, if no individual is the Chief Human Resources Officer, then the designated acting Chief Human Resources Officer).

U. “Plan Year” means the fiscal year on which the records of the Plan are kept, which shall be the calendar year; provided, however, that the first Plan Year shall be the period commencing April 1, 1997 and ending December 31, 1997.

V. “Reinvested Cash Dividends” means cash dividends paid on Corporation Shares allocated to a Participant’s Account which are utilized to purchase additional Corporation Shares for such Participant’s Account.

W. “Retirement” has the meaning set forth in Section V(D) hereof.

X. “Section 16 Insider” means any Participant who is designated by the Corporation as a reporting person under Section 16 of the Exchange Act.

Y. “Service Award” means a discretionary award, in the form of a Service Award Contribution, made by the Corporation in recognition of an Employee’s service to the Corporation.

ZZ. “Service Award Contribution” means a discretionary contribution by the Corporation to be allocated to a Participant’s Account in recognition of an Employee’s service to the Corporation. The Service Award Contribution, net of any applicable withholding and deductions, shall be used to purchase Corporation Shares.

AA. “Share Retention Contribution” means, subject to fulfillment of the requirements in Section V(D) hereof, a contribution by the Corporation to be allocated to a Participant’s Account in a Plan Year equal to 5% of the amount of Payroll Withholding Contributions, Service Award Contributions and/or Other Permitted Contributions made to such Participant’s Account in the first of the two immediately preceding Plan Years as set forth in Section V(D). Share Retention Contributions shall be utilized to purchase additional Corporation Shares for the Participant’s Account.

BB. “Two-Plan-Year-Period” means the two Plan Years immediately preceding the Plan Year in which a Share Retention Contribution is made.

3

SECTION III - INTRODUCTION

A. Administration. The Plan shall be administered by the Committee; provided, however, that the Board shall have the authority to exercise any and all duties and responsibilities assigned to the Committee under the Plan. The Committee may delegate all or any portion of its responsibilities and powers to any one or more of its members and may delegate all or any part of its responsibilities and powers to any person or persons selected by it, including, without limitation, the Plan Administrator. In addition, unless determined otherwise by the Board or Committee, the Plan Administrator shall handle the day-to-day administration of the Plan. The Plan Administrator may employ accountants, legal counsel and any other experts he or she deems advisable to assist in the administration of the Plan.

B. Corporation Shares. The aggregate number of Corporation Shares which may be purchased, or awarded as Service Award Contributions, under the Plan shall not exceed 5,000,000.

C. Adjustments. In the event the number of outstanding Corporation Shares changes as a result of any stock split, stock dividend, recapitalization, merger, consolidation, reorganization, combination, or exchange of shares, split-up, split-off, spin-off, liquidation or other similar change in capitalization, or any distribution made to holders of Corporation Shares other than cash dividends, the number of Corporation Shares that may be purchased, or awarded as Service Award Contributions, under the Plan shall be automatically adjusted, and the Committee shall be authorized to make such other equitable adjustments as it deems necessary so that the value of the interest of the Participants shall not be decreased by reason of the occurrence of such event. Any such adjustment shall be deemed conclusive and binding on the Corporation, each Participant, his or her Beneficiaries and all other interested parties.

D. Supplements. From time to time, supplements may be attached by amendment to and form a part of this Plan and shall be given the same effect that such provision would have if it was incorporated within the basic text of the Plan. Such supplements may modify or supplement the provisions of the Plan as they apply to particular groups of Employees or groups of Participants, shall specify the persons affected by such supplements and shall supersede the other provisions of the Plan to the extent necessary to eliminate inconsistencies between the Plan provisions and the provisions of such supplements.

E. Non-Resident Aliens. With respect to non-resident alien Employees, the Committee or Plan Administrator may adopt one or more sets of procedures and provisions, which may be different than those included in this Plan for other Participants, with each set of procedures and provisions applying to some or all of such non-resident alien Employees, as determined by the Committee in its sole discretion or the Plan Administrator in his or her sole discretion, in order to comply with the applicable laws of the respective jurisdiction(s) in which such non-resident alien Employees live or work and/or to take into account other legal, tax, accounting and similar issues arising by virtue of the participation of such non-resident alien

4

Employees. The adoption of any such procedures and provisions shall not be deemed an amendment to this Plan.

F. Applicable Law. To the extent not preempted by the laws of the United States, the laws of the State of Delaware shall be the controlling law in all matters relating to this Plan.

SECTION IV - PARTICIPATION

A. Eligibility. Any person who is or becomes an Employee may commence participation in the Plan as soon as administratively feasible on or subsequent to such individual’s date of hire; provided, however, that for purposes of the Plan, the Committee or the Plan Administrator may exclude from eligibility non-resident aliens (or classes of non-resident aliens), if any, if the requirements of local law, rules or regulations, including without limitation, the tax, labor, accounting or securities laws, rules, regulations or consequences, make participation by such non-resident aliens (or class(es) of non-resident aliens) impractical, as determined by the Committee in its sole discretion or the Plan Administrator in his or her sole discretion.

B. Enrollment. Enrollment in the Plan shall be accomplished by such procedures as are established by the Committee or the Plan Administrator from time to time. Unless determined otherwise by the Committee or the Plan Administrator, Payroll Withholding Contributions will commence as soon as administratively practicable following a Participant’s communication of instructions to commence such contributions. Other Permitted Contributions will be made as soon as is administratively feasible, as determined by the Committee or the Plan Administrator, following the Corporation’s receipt of instructions to commence such contributions.

C. Election Changes. A Participant may increase, decrease, cease or resume the amount of his or her Payroll Withholding Contributions by communicating further instructions pursuant to such procedures as are established by the Committee or the Plan Administrator from time to time. Election changes shall become effective as soon as administratively feasible after instructions have been properly communicated. There shall be no limitation on the number of election changes a Participant may make. A discontinuance of contributions in and of itself shall not constitute a withdrawal from the Plan.

SECTION V - CONTRIBUTIONS

A. Payroll Withholding Contributions. Any Payroll Withholding Contribution shall equal at least 0.5% but not exceed 100% of a Participant’s Bi-Weekly Base Pay, net of all other applicable withholding and deductions. The Corporation shall remit these contributions to the Custodian Bank promptly.

B. Other Permitted Contributions. A Participant may make Other Permitted Contributions in a single sum at such time or times permitted by the Committee or the Plan Administrator.

5

C. Matching Contributions. The Corporation shall make a Matching Contribution equal to 15% of the Payroll Withholding Contributions, Service Award Contributions and/or Other Permitted Contributions made by, or on behalf of, each Participant during any calendar quarter, provided there has not been a withdrawal or sale of any of the following from the Participant’s Account:

i.    Payroll Withholding Contributions, Service Award Contributions or Other Permitted Contributions made during such period; or

ii.     Corporation Shares purchased with any contributions referred to in to Section V(C)(i).

Matching Contributions will not be made with respect to Share Retention Contributions. In addition, Matching Contributions will not be made with respect to Payroll Withholding Contributions, Service Award Contributions and/or Other Permitted Contributions made during any Plan Year to the extent such contributions exceed $25,000 in the aggregate. Matching Contributions will be made at or after the end of each calendar quarter, but in no event later than the March 15^th of the Plan Year immediately following the end of the applicable calendar quarter. Matching Contributions shall be net of all applicable withholding and deductions. A Participant shall be eligible to receive a Matching Contribution with respect to a calendar quarter if the Participant has satisfied the conditions set forth in this section, even if the Participant’s employment terminated during such quarter for any reason.

D. Share Retention Contributions. Subject to the conditions and limitations of this Section V(D), the Corporation shall allocate Share Retention Contributions to the Accounts of those Participants who qualify therefor. Subject to the conditions and limitations of this Section V(D), a Participant shall qualify for a Share Retention Contribution in a Plan Year if the Participant is employed on the last day of the relevant Two-Plan-Year-Period, and if, during such Two-Plan-Year-Period, there has not been a withdrawal or sale of any of the following from the Participant’s Account:

i.    Payroll Withholding Contributions, Service Award Contributions or Other Permitted Contributions made during such period;

ii.    Matching Contributions made during such period; or

iii.    Corporation Shares purchased with any contributions referred to in to Section V(D)(i) or (ii).

Share Retention Contributions will not be made with respect to Matching Contributions. In addition, Share Retention Contributions will not be made with respect to Payroll Withholding Contributions, Service Award Contributions and/or Other Permitted Contributions made during any Plan Year to the extent such contributions exceed $25,000 in the aggregate. Except as otherwise provided herein, Share Retention Contributions shall be made as soon as reasonably practicable after the first day of the Plan Year following a Two-Plan-Year-Period, but in no event

6

later than the March 15^th of the Plan Year immediately following the end of the Two-Plan-Year-Period. Share Retention Contributions shall be net of all applicable withholding and deductions.

Notwithstanding anything in this Section V(D) to the contrary, a Participant whose employment terminates by reason of Retirement, death or Disability prior to the end of a Two-Plan-Year-Period shall be eligible to receive a Share Retention Contribution with respect to such partial Two-Plan-Year-Period (consisting of the Plan Year during which the Participant’s employment so terminates and the immediately preceding Plan Year) if and only if there have been no withdrawals or sales from the Participant’s Account pursuant to Section V(D)(i)-(iii) during such period (prior to termination of employment). The Share Retention Contribution made on behalf of any such eligible terminated Participant with respect to such period shall be prorated based on the number of days during the final Plan Year that the Participant was employed and shall be net of all applicable withholding and deductions. Notwithstanding any provision herein to the contrary, the Share Retention Contribution made on behalf of any such eligible terminated Participant shall be made as soon as reasonably practicable, but not later than the March 15th, after the first day of the Plan Year following the Plan Year that includes the Participant’s Retirement, death or Disability.

For purposes of this Section V(D), a Participant’s employment shall be considered to have terminated by reason of Retirement if he or she terminates employment and is either (i) age 65 or older or (ii) age 55 or older, with at least 10 years of service with the Corporation and/or its affiliates or subsidiaries. For purposes of this Section V(D), a Participant’s employment shall be considered to have terminated by reason of Disability if he or she terminates employment with eligibility for, and is awarded, disability benefits under a long-term disability plan maintained by the Corporation.¹ 

E. Service Award Contributions. The Corporation may make Service Award Contributions to the Accounts of those Employees whom it wishes to recognize for service to the Corporation. Service Award Contributions are made at the discretion of the Corporation. All Corporation Service Awards related to Corporation Shares shall be made under this Plan through such Service Award Contributions.

F. Assignment of Rights Under the Plan. Unless otherwise determined by the Committee, a Participant’s Account shall not be transferable by a Participant otherwise than by will or by the laws of intestacy; provided, however, that, a Participant may, in accordance with Section IX(A) and in the manner established by the Committee, designate one or more Beneficiaries to exercise the rights of the Participant and to receive any property payable or distributable with respect to such Participant’s Account upon the death of the Participant. Except as otherwise set forth in the Plan, during the Participant’s lifetime, only the Participant (or, if permissible under applicable law, the Participant’s guardian or legal representative) may make

_________________________ 

¹       Please note that determination of disability and award of disability benefits may occur retroactively long after the Participant’s employment termination date and after the date that Share Retention Contribution determinations were otherwise made for the relevant Plan Year.

7

elections or withdrawals with respect to such Participant’s Account. Unless otherwise determined by the Committee, a Participant’s Account, or rights with respect to such Account, may not be pledged, alienated, attached or otherwise encumbered, and any purported pledge, alienation, attachment or encumbrance thereof shall be void and unenforceable against the Corporation or any of its subsidiaries or affiliates.

SECTION VI - ACQUISITION OF CORPORATION SHARES

A. Application of Current Contributions. Except to the extent otherwise provided in Section VIII(B), as soon as reasonably practicable following its receipt of Payroll Withholding Contributions, Other Permitted Contributions, Service Award Contributions, Matching Contributions and/or Share Retention Contributions, the Custodian Bank shall purchase the maximum number of Corporation Shares that the funds allocated to each Participant’s Account may purchase at the then-prevailing market prices. Such purchases may be in the open market or directly from the Corporation. Corporation Shares so acquired shall be allocated to the relevant Participant’s Account.

B. Cash Dividends. Except to the extent otherwise provided in Section VIII(B), any cash dividends paid on Corporation Shares allocated to any Participant’s Account shall be utilized by the Custodian Bank in accordance with the Participant’s direction to either (i) purchase additional Corporation Shares at prices and in the manner specified above or (ii) be retained in cash.

C. Book Entry. Unless otherwise determined by the Committee or the Plan Administrator, Corporation Shares held under the Plan shall be held in book entry form, and the Custodian Bank or its nominee shall be identified as the owner thereof while such Corporation Shares remain in the Plan.

SECTION VII - RIGHTS WITH RESPECT TO SHARES HELD IN PLAN

All rights accruing to an owner of record of Corporation Shares shall belong to and be vested in the Participant for whose Account such Corporation Shares are being held by the Custodian Bank, including, without limitation, the right to receive all dividends payable in respect of such Corporation Shares, the right to receive all notices of stockholders’ meetings, the right to vote and the right to tender or refrain from tendering such Corporation Shares in response to a tender offer.

SECTION VIII - WITHDRAWALS FROM PLAN

A.Process upon Termination of Employment. Upon termination of employment and notification to the recordkeeper, the Participant’s Account shall no longer associated with the Plan, provided, however, that in the case of termination of employment due to the death of the Participant, the Participant’s Account (or individual account established hereunder) shall be treated in accordance with Sections V(F) and IX(A).

8

B. Amounts Received Following Termination of Employment. Any cash contributions that would otherwise be made to the Participant’s Account following the date of the Participant’s termination of employment shall not be utilized to purchase additional Corporation Shares and shall instead be distributed to the Participant or his or her Beneficiary(ies) in cash.

C. Fractional Shares and Brokerage Commissions. In all cases, cash will be paid in lieu of fractional Corporation Shares. Any brokerage commissions incurred in connection with the sale of Corporation Shares to facilitate a distribution will be charged to the Participant’s Account.

D. Special Rule Applicable To Section 16 Insiders. Except as otherwise determined by the Committee, a Section 16 Insider shall not be permitted to receive a cash distribution (other than a cash dividend) from the Plan, if, within the previous six months, he or she (or any other person whose transactions are attributed to the Section 16 Insider under Section 16 of the Exchange Act) either (i) acquired Corporation Shares in the open market or pursuant to a private transaction; or (ii) made an election under the Plan (or under any other Plan sponsored by the Corporation) that resulted in an acquisition of equity securities of the Corporation within the meaning of that term under Section 16 of the Exchange Act. The Committee or Plan Administrator may make such other rules as are necessary to comply with Section 16 of the Exchange Act, as amended from time to time.

SECTION IX - MISCELLANEOUS PROVISIONS

A. Designation of Beneficiary. Upon becoming a Participant of the Plan, each Participant shall designate one or more Beneficiaries in the manner specified by the Corporation or the Corporation's designee. A Beneficiary Designation Form will be effective only if it is has been properly completed and submitted (as determined in the Corporation's sole discretion) before the Participant's death. Any subsequent Beneficiary Designation Form properly completed and submitted to the Corporation will supersede any previous Beneficiary Designation Form so submitted.

The Corporation or its designee reserves the right to distribute the balance of a Participant's Account to his or her estate notwithstanding the designation of a Beneficiary, if the Corporation or its designee is unable to locate the Beneficiary, a dispute arises among Beneficiaries or under any other circumstances the Corporation or its designee deems appropriate.

B. Withholding of Taxes. The Corporation shall withhold from any amounts payable to the Participant all Federal, state, city, or other taxes and/or other amounts as legally required by reason of Participant’s participation in this Plan.

C. Expenses. All charges of the Custodian Bank, the cost of maintenance of the Accounts of Participants, the purchase of Corporation Shares, and the cost of transferring Corporation Shares to the Participants and Beneficiaries shall be borne by the Corporation;

9

provided, however, that brokerage charges involved in the sale of Corporation Shares, if any, shall be charged to the relevant Participant’s Account.

D. Compliance With Legal Requirements. The Corporation shall be bound by all applicable laws in operating this Plan and shall administer and interpret this Plan in accordance with legal requirements.

E. Amendment, Term and Termination. The Committee reserves the right to amend, restate or terminate the Plan at any time, in its sole discretion, without advance notice. The Plan shall continue indefinitely until terminated by the Committee.

F. Termination of Participation. For the purposes of this Plan, a Participant's employment shall immediately terminate and the Participant shall cease to be employed by the Corporation effective on the first day following the Participant's last active date of service, without regard to any actual, deemed or notional notice period or any period during which the Participant receives or is entitled to receive salary continuance, termination pay, pay in lieu of notice or severance pay. Without limiting the foregoing, a Participant shall not qualify for a Share Retention Contribution in a Plan Year if the Participant ceases to be actively employed by the Corporation before the last day of the relevant Two-Plan-Year-Period, regardless of whether the termination of the Participant's employment is lawful or unlawful, except as provided herein in the event of Retirement, death or Disability.

SECTION X - EFFECTIVE DATE OF PLAN

This amendment and restatement of the Plan will be effective as of October 22, 2013.

10

EX-31.1

Exhibit 31.1

Chairman, President and CEO Rule 13a-14(a)/15d-14(a) Certification of Periodic Report (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002)

CERTIFICATION OF PERIODIC REPORT

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Ralph W. Babb, Jr., certify that:

1. I have reviewed this report on Form 10-Q for the quarterly period ended September 30, 2013 of Comerica Incorporated (the “Registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;

4. The Registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the Registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Registrant's internal control over financial reporting that occurred during the Registrant's most recent fiscal quarter (the Registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting; and

5. The Registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant's auditors and the audit committee of the Registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant's internal control over financial reporting.

Date:	October 29, 2013	/s/ Ralph W. Babb, Jr.
		Ralph W. Babb, Jr.
		Chairman, President and
		Chief Executive Officer

EX-31.2

Exhibit 31.2

Vice Chairman and CFO Rule 13a-14(a)/15d-14(a) Certification of Periodic Report (pursuant to Section 302 of the Sarbanes-Oxley Act of 2002)

CERTIFICATION OF PERIODIC REPORT

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Karen L. Parkhill, certify that:

1. I have reviewed this report on Form 10-Q for the quarterly period ended September 30, 2013 of Comerica Incorporated (the “Registrant”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Registrant as of, and for, the periods presented in this report;

4. The Registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f)) for the Registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Registrant's internal control over financial reporting that occurred during the Registrant's most recent fiscal quarter (the Registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Registrant's internal control over financial reporting; and

5. The Registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Registrant's auditors and the audit committee of the Registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Registrant's internal control over financial reporting.

Date:	October 29, 2013	/s/ Karen L. Parkhill
		Karen L. Parkhill
		Vice Chairman and
		Chief Financial Officer

EX-32

Exhibit 32

Section 1350 Certification of Periodic Report (pursuant to Section 906 of the Sarbanes-Oxley Act of 2002)

CERTIFICATION OF PERIODIC REPORT

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned, Ralph W. Babb, Jr., Chairman, President and Chief Executive Officer, and Karen L. Parkhill, Vice Chairman and Chief Financial Officer, of Comerica Incorporated (the “Company”), certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that:

(1) the Quarterly Report on Form 10-Q of the Company for the quarterly period ended September 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated:	October 29, 2013	/s/ Ralph W. Babb, Jr.
		Ralph W. Babb, Jr.
		Chairman, President and
		Chief Executive Officer
		/s/ Karen L. Parkhill
		Karen L. Parkhill
		Vice Chairman and
		Chief Financial Officer

XML

Employee Benefit Plans

9 Months Ended

Sep. 30, 2013

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Employee Benefit Plans

EMPLOYEE BENEFIT PLANS

Net periodic benefit costs are charged to "employee benefits expense" on the consolidated statements of comprehensive income. The components of net periodic benefit cost for the Corporation's qualified pension plan, non-qualified pension plan and postretirement benefit plan are as follows.

Qualified Defined Benefit Pension Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Service cost	$	9		$	9		$	28		$	25
Interest cost	20			19			59			59
Expected return on plan assets	(33		)	(29		)	(99		)	(85		)
Amortization of prior service cost	1			1			3			3
Amortization of net loss	18			14			56			40
Net periodic defined benefit cost	$	15		$	14		$	47		$	42

Non-Qualified Defined Benefit Pension Plan	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2013		2012		2013			2012
Service cost	$	1	$	1	$	3		$	3
Interest cost	2		2		7			7
Amortization of prior service cost	—		—		(1		)	(1		)
Amortization of net loss	3		1		8			5
Net periodic defined benefit cost	$	6	$	4	$	17		$	14

Postretirement Benefit Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Interest cost	$	1		$	1		$	3		$	3
Expected return on plan assets	(1		)	(1		)	(3		)	(3		)
Amortization of transition obligation	—			1			—			3
Amortization of net loss	—			—			1			1
Net periodic postretirement benefit cost	$	—		$	1		$	1		$	4

For further information on the Corporation's employee benefit plans, refer to Note 17 to the consolidated financial statements in the Corporation's 2012 Annual Report.

XML

Credit Quality And Allowance For Credit Losses (Troubled Debt Restructurings By Type Of Modification) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	$ 29		$ 40		$ 93		$ 90
Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	27	[1]	21	[1]	70	[1]	64	[1]
Extension Term, Minimum Period					90 days		90 days
Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	2		0		4		4
AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2]	19	[2]	19	[2]	22	[2]
Business loans
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	21		32		80		81
Business loans | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	21	[1]	13	[1]	61	[1]	56	[1]
Business loans | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0		0		0		3
Business loans | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2]	19	[2]	19	[2]	22	[2]
Business loans | Commercial
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	3		3		21		18
Business loans | Commercial | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	3	[1]	3	[1]	13	[1]	17	[1]
Business loans | Commercial | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0		0		0		1
Business loans | Commercial | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2]	0	[2]	8	[2]	0	[2]
Business loans | Real estate construction
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period					0		1
Business loans | Real estate construction | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period					0	[1]	1	[1]
Business loans | Real estate construction | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period					0		0
Business loans | Real estate construction | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period					0	[2]	0	[2]
Business loans | Real estate construction | Other business lines
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period					0	[3]	1	[3]
Business loans | Real estate construction | Other business lines | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period					0	[1],[3]	1	[1],[3]
Business loans | Real estate construction | Other business lines | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period					0	[3]	0	[3]
Business loans | Real estate construction | Other business lines | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period					0	[2],[3]	0	[2],[3]
Business loans | Commercial mortgage
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	18		29		59		62
Business loans | Commercial mortgage | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	18	[1]	10	[1]	48	[1]	38	[1]
Business loans | Commercial mortgage | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0		0		0		2
Business loans | Commercial mortgage | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2]	19	[2]	11	[2]	22	[2]
Business loans | Commercial mortgage | Commercial Real Estate business line
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	14	[4]	27	[4]	33	[4]	45	[4]
Business loans | Commercial mortgage | Commercial Real Estate business line | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	14	[1],[4]	8	[1],[4]	33	[1],[4]	23	[1],[4]
Business loans | Commercial mortgage | Commercial Real Estate business line | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[4]	0	[4]	0	[4]	0	[4]
Business loans | Commercial mortgage | Commercial Real Estate business line | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2],[4]	19	[2],[4]	0	[2],[4]	22	[2],[4]
Business loans | Commercial mortgage | Other business lines
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	4	[3]	2	[3]	26	[3]	17	[3]
Business loans | Commercial mortgage | Other business lines | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	4	[1],[3]	2	[1],[3]	15	[1],[3]	15	[1],[3]
Business loans | Commercial mortgage | Other business lines | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[3]	0	[3]	0	[3]	2	[3]
Business loans | Commercial mortgage | Other business lines | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2],[3]	0	[2],[3]	11	[2],[3]	0	[2],[3]
Retail loans
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	8		8		13		9
Retail loans | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	6	[1]	8	[1]	9	[1]	8	[1]
Retail loans | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	2		0		4		1
Retail loans | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2]	0	[2]	0	[2]	0	[2]
Retail loans | Residential mortgage
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	1		8		3		9
Retail loans | Residential mortgage | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[1]	8	[1],[5]	1	[1],[5]	8	[1],[5]
Retail loans | Residential mortgage | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	1		0		2		1
Retail loans | Residential mortgage | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2]	0	[2]	0	[2]	0	[2]
Retail loans | Consumer
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	7		0		10		0
Retail loans | Consumer | Home equity
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	5		0		7		0
Retail loans | Consumer | Other consumer
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	2		0		3		0
Retail loans | Consumer | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	6	[1]	0	[1]	8	[1]	0	[1]
Retail loans | Consumer | Principal Deferrals | Home equity
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	4	[1],[5]	0	[1]	6	[1],[5]	0	[1]
Retail loans | Consumer | Principal Deferrals | Other consumer
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	2	[1],[5]	0	[1]	2	[1],[5]	0	[1]
Retail loans | Consumer | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	1		0		2		0
Retail loans | Consumer | Interest Rate Reductions | Home equity
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	1		0		1		0
Retail loans | Consumer | Interest Rate Reductions | Other consumer
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0		0		1		0
Retail loans | Consumer | AB Note Restructures
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2]	0	[2]	0	[2]	0	[2]
Retail loans | Consumer | AB Note Restructures | Home equity
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	0	[2]	0	[2]	0	[2]	0	[2]
Retail loans | Consumer | AB Note Restructures | Other consumer
Financing Receivable, Modifications [Line Items]
Recorded balance of troubled debt restructuring modified during the period	$ 0	[2]	$ 0	[2]	$ 0	[2]	$ 0	[2]

[1] Primarily represents loan balances where terms were extended 90 days or more at or above contractual interest rates.

[2] Loan restructurings whereby the original loan is restructured into two notes: an "A" note, which generally reflects the portion of the modified loan which is expected to be collected; and a "B" note, which is either fully charged off or exchanged for an equity interest.

[3] Primarily loans secured by owner-occupied real estate.

[4] Primarily loans to real estate developers.

[5] Includes bankruptcy loans for which the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt.

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Consolidated Statements Of Comprehensive Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
INTEREST INCOME
Interest and fees on loans	$ 381	$ 400	$ 1,159	$ 1,219
Interest on investment securities	54	57	159	179
Interest on short-term investments	4	3	10	9
Total interest income	439	460	1,328	1,407
INTEREST EXPENSE
Interest on deposits	13	17	43	54
Interest on medium- and long-term debt	14	16	43	49
Total interest expense	27	33	86	103
Net interest income	412	427	1,242	1,304
Provision for credit losses	8	22	37	63
Net interest income after provision for credit losses	404	405	1,205	1,241
NONINTEREST INCOME
Service charges on deposit accounts	53	53	161	162
Fiduciary income	41	39	128	116
Commercial lending fees	28	22	71	71
Letter of credit fees	17	19	49	54
Card fees	20	16	55	48
Foreign exchange income	9	9	27	29
Bank-owned life insurance	12	10	31	30
Brokerage fees	5	5	14	14
Net securities gains (losses)	1	0	(1)	11
Other noninterest income	28	24	87	79
Total noninterest income	214	197	622	614
NONINTEREST EXPENSES
Salaries	196	192	566	582
Employee benefits	59	61	185	181
Total salaries and employee benefits	255	253	751	763
Net occupancy expense	41	40	119	121
Equipment expense	15	17	45	50
Outside processing fee expense	31	27	89	79
Software expense	22	23	66	67
Merger and restructuring charges	0	25	0	33
FDIC insurance expense	9	9	26	29
Advertising expense	6	7	18	21
Other real estate expense	1	2	3	6
Other noninterest expenses	37	46	132	161
Total noninterest expenses	417	449	1,249	1,330
Income before income taxes	201	153	578	525
Provision for income taxes	54	36	154	134
Net Income	147	117	424	391
Income allocated to participating securities	2	1	6	4
Net income attributable to common shares	145	116	418	387
Basic net income per common share	$ 0.80	$ 0.61	$ 2.28	$ 2.00
Diluted net income per common share	$ 0.78	$ 0.61	$ 2.23	$ 2.00
Comprehensive income	144	165	296	494
Cash dividends declared on common stock	$ 31	$ 29	$ 95	$ 78
Cash dividends declared per common share	$ 0.17	$ 0.15	$ 0.51	$ 0.40

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Investment Securities

9 Months Ended

Sep. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Investment Securities

INVESTMENT SECURITIES

A summary of the Corporation’s investment securities available-for-sale follows:

(in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
September 30, 2013
U.S. Treasury and other U.S. government agency securities	$	45	$	—	$	—	$	45
Residential mortgage-backed securities (a)	9,113		121		145		9,089
State and municipal securities	27		—		2		25
Corporate debt securities	57		—		—		57
Equity and other non-debt securities	279		1		8		272
Total investment securities available-for-sale (b)	$	9,521	$	122	$	155	$	9,488
December 31, 2012
U.S. Treasury and other U.S. government agency securities	$	35	$	—	$	—	$	35
Residential mortgage-backed securities (a)	9,672		248		—		9,920
State and municipal securities	27		—		4		23
Corporate debt securities	58		—		—		58
Equity and other non-debt securities	268		—		7		261
Total investment securities available-for-sale (b)	$	10,060	$	248	$	11	$	10,297

(a) Residential mortgage-backed securities 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 $176 million and $166 million, respectively, as of September 30, 2013 and $191 million and $180 million, respectively, as of December 31, 2012.

A summary of the Corporation’s investment securities available-for-sale in an unrealized loss position as of September 30, 2013 and December 31, 2012 follows:

	Temporarily Impaired
	Less than 12 Months				12 Months or more					Total
(in millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2013
Residential mortgage-backed securities (a)	$	5,167	$	145	$	—	$	—		$	5,167	$	145
State and municipal securities (b)	—		—		25		2			25		2
Corporate debt securities (b)	—		—		1		—		(c)	1		—		(c)
Equity and other non-debt securities (b)	—		—		141		8			141		8
Total impaired securities	$	5,167	$	145	$	167	$	10		$	5,334	$	155
December 31, 2012
State and municipal securities (b)	$	—	$	—	$	23	$	4		$	23	$	4
Corporate debt securities (b)	—		—		1		—		(c)	1		—		(c)
Equity and other non-debt securities (b)	—		—		156		7			156		7
Total impaired securities	$	—	$	—	$	180	$	11		$	180	$	11

(a) Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

(b) Auction-rate securities.

(c) Unrealized losses less than $0.5 million.

At September 30, 2013, the Corporation had 178 securities in an unrealized loss position with no credit impairment, including 105 residential mortgage-backed securities, 50 equity and other non-debt auction-rate preferred securities, 22 state and municipal auction-rate securities and one corporate auction-rate debt security. As of September 30, 2013, approximately 86 percent of the aggregate par value of auction-rate securities have been redeemed or sold since acquisition, of which approximately 95 percent were redeemed at or above cost. The unrealized losses for these securities resulted from changes in market interest rates and liquidity. The Corporation ultimately expects full collection of the carrying amount of these securities, does not intend to sell the securities in an unrealized loss position, and it is not more-likely-than-not that the Corporation will be required to sell the securities in an unrealized loss position prior to recovery of amortized cost. The Corporation does not consider these securities to be other-than-temporarily impaired at September 30, 2013.

Sales, calls and write-downs of investment securities available-for-sale resulted in the following gains and losses recorded in “net securities gains (losses)” on the consolidated statements of comprehensive income, computed based on the adjusted cost of the specific security.

	Nine Months Ended September 30,
(in millions)	2013			2012
Securities gains	$	1		$	12
Securities losses (a)	(2		)	(1		)
Net securities (losses) gains	$	(1	)	$	11

(a) Charges related to a derivative contract tied to the conversion rate of Visa Class B shares.

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)
September 30, 2013	Amortized Cost		Fair Value
Contractual maturity
Within one year	$	78	$	78
After one year through five years	263		268
After five years through ten years	97		96
After ten years	8,804		8,774
Subtotal	9,242		9,216
Equity and other non-debt securities	279		272
Total investment securities available-for-sale	$	9,521	$	9,488

Included in the contractual maturity distribution in the table above were auction-rate securities with a total amortized cost and fair value of $28 million and $26 million, respectively. Auction-rate securities are long-term, floating rate instruments for which interest rates are reset at periodic auctions. At each successful auction, the Corporation has the option to sell the security at par value. Additionally, the issuers of auction-rate securities generally have the right to redeem or refinance the debt. As a result, the expected life of auction-rate securities may differ significantly from the contractual life. Also included in the table above were residential mortgage-backed securities with total amortized cost and fair value of $9.1 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 September 30, 2013, investment securities with a carrying value of $2.9 billion were pledged where permitted or required by law to secure $2.0 billion of liabilities, primarily public and other deposits of state and local government agencies and derivative instruments.

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Investment Securities (Tables)

9 Months Ended

Sep. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Summary Of Investment Securities Available-For-Sale

A summary of the Corporation’s investment securities available-for-sale follows:

(in millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
September 30, 2013
U.S. Treasury and other U.S. government agency securities	$	45	$	—	$	—	$	45
Residential mortgage-backed securities (a)	9,113		121		145		9,089
State and municipal securities	27		—		2		25
Corporate debt securities	57		—		—		57
Equity and other non-debt securities	279		1		8		272
Total investment securities available-for-sale (b)	$	9,521	$	122	$	155	$	9,488
December 31, 2012
U.S. Treasury and other U.S. government agency securities	$	35	$	—	$	—	$	35
Residential mortgage-backed securities (a)	9,672		248		—		9,920
State and municipal securities	27		—		4		23
Corporate debt securities	58		—		—		58
Equity and other non-debt securities	268		—		7		261
Total investment securities available-for-sale (b)	$	10,060	$	248	$	11	$	10,297

(a) Residential mortgage-backed securities 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 $176 million and $166 million, respectively, as of September 30, 2013 and $191 million and $180 million, respectively, as of December 31, 2012.

Summary Of Investment Securities Available-For-Sale In Unrealized Loss Positions

A summary of the Corporation’s investment securities available-for-sale in an unrealized loss position as of September 30, 2013 and December 31, 2012 follows:

	Temporarily Impaired
	Less than 12 Months				12 Months or more					Total
(in millions)	Fair Value		Unrealized Losses		Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
September 30, 2013
Residential mortgage-backed securities (a)	$	5,167	$	145	$	—	$	—		$	5,167	$	145
State and municipal securities (b)	—		—		25		2			25		2
Corporate debt securities (b)	—		—		1		—		(c)	1		—		(c)
Equity and other non-debt securities (b)	—		—		141		8			141		8
Total impaired securities	$	5,167	$	145	$	167	$	10		$	5,334	$	155
December 31, 2012
State and municipal securities (b)	$	—	$	—	$	23	$	4		$	23	$	4
Corporate debt securities (b)	—		—		1		—		(c)	1		—		(c)
Equity and other non-debt securities (b)	—		—		156		7			156		7
Total impaired securities	$	—	$	—	$	180	$	11		$	180	$	11

(a) Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

(b) Auction-rate securities.

(c) Unrealized losses less than $0.5 million.

Summary of Net Securities Gains (Losses)

Sales, calls and write-downs of investment securities available-for-sale resulted in the following gains and losses recorded in “net securities gains (losses)” on the consolidated statements of comprehensive income, computed based on the adjusted cost of the specific security.

	Nine Months Ended September 30,
(in millions)	2013			2012
Securities gains	$	1		$	12
Securities losses (a)	(2		)	(1		)
Net securities (losses) gains	$	(1	)	$	11

(a) Charges related to a derivative contract tied to the conversion rate of Visa Class B shares.

Contractual Maturity Distribution Of Debt Securities

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)
September 30, 2013	Amortized Cost		Fair Value
Contractual maturity
Within one year	$	78	$	78
After one year through five years	263		268
After five years through ten years	97		96
After ten years	8,804		8,774
Subtotal	9,242		9,216
Equity and other non-debt securities	279		272
Total investment securities available-for-sale	$	9,521	$	9,488

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Accumulated Other Comprehensive Income (Loss) (Schedule Of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Investment securities, Balance at beginning of period, net of tax	$ 150	$ 129
Investment securities, Net unrealized holding (losses) gains arising during the period	(270)	123
Investment securities, Provision (benefit) for income taxes	(100)	44
Investment securities, Net unrealized holding (losses) gains arising during period, net of tax	(170)	79
Investment securities, Net realized gains included in net securities gains (losses)	1	12
Investment securities, Provision for income taxes	0	4
Investment securities, Reclassification adjustment for net securities gains included in net income, net of tax	1	8
Investment securities, Change in net unrealized (losses) gains on investment securities available-for-sale, net of tax	(171)	71
Investment securities, Balance at end of period, net of tax	(21)	200
Benefit plans, Balance at beginning of period, net of tax	(563)	(485)
Benefit plans, Net defined benefit pension and other postretirement adjustment arising during the period, net of tax	0	0
Less: Amortization of actuarial net loss	(65)	(46)
Less: Amortization of prior service cost	(2)	(2)
Less: Amortization of transition obligation	0	(3)
Benefit plans, Amounts recognized in emoloyee benefits	(67)	(51)
Benefit plans, Benefit for income taxes	(24)	(19)
Benefit plans, Adjustment for amounts recognized as components of net periodic benefit cost during the period, net of tax	(43)	(32)
Benefit plans, Change in defined benefit pension and other postretirement plans adjustment, net of tax	43	32
Benefit plans, Balance at end of period, net of tax	(520)	(453)
Total accumulated other comprehensive loss at end of period, net of tax	$ (541)	$ (253)	$ (413)

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Credit Quality And Allowance For Credit Losses (Accretable Yield For Acquired Purchased Credit-Impaired Loans) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Credit Quality And Allowance For Credit Losses [Abstract]
Balance at beginning of period	$ 10	$ 16	$ 16	$ 25
Reclassifications from nonaccretable	4	0	4	0
Accretion	(3)	(3)	(9)	(12)
Balance at end of period	$ 11	$ 13	$ 11	$ 13

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Income Taxes And Tax-Related Items

9 Months Ended

Sep. 30, 2013

Income Tax Disclosure [Abstract]

Income Taxes and Tax-Related Items

INCOME TAXES AND TAX-RELATED ITEMS

At September 30, 2013, net unrecognized tax benefits were $13 million, compared to $42 million at December 31, 2012. The decrease in unrecognized tax benefits of $29 million was primarily the result of the recognition of federal settlements. The Corporation anticipates that there will be no change in net unrecognized tax benefits within the next twelve months. Included in "accrued expense and other liabilities" on the consolidated balance sheets was a $2 million liability for tax-related interest and penalties at September 30, 2013, compared to $4 million at December 31, 2012. The $2 million decrease was primarily a result of settlements with tax authorities.

Net deferred tax assets were $329 million at September 30, 2013, compared to $254 million at December 31, 2012. The increase of $75 million in net deferred tax assets resulted primarily from a decrease in unrealized gains on investment securities available-for-sale recognized in other comprehensive income, partially offset by the utilization of tax credits. Deferred tax assets were evaluated for realization and it was determined that no valuation allowance was needed at both September 30, 2013 and December 31, 2012. This conclusion was based on available evidence of loss carryback capacity, projected future reversals of existing taxable temporary differences and assumptions made regarding future events.

In the ordinary course of business, the Corporation enters into certain transactions that have tax consequences. From time to time, the Internal Revenue Service (IRS) may review and/or challenge specific interpretive tax positions taken by the Corporation with respect to those transactions. The Corporation believes that its tax returns were filed based upon applicable statutes, regulations and case law in effect at the time of the transactions. The IRS, an administrative authority or a court, if presented with the transactions, could disagree with the Corporation’s interpretation of the tax law.

Based on current knowledge and probability assessment of various potential outcomes, the Corporation believes that current tax reserves are adequate, and the amount of any potential incremental liability arising is not expected to have a material adverse effect on the Corporation’s consolidated financial condition or results of operations. Probabilities and outcomes are reviewed as events unfold, and adjustments to the reserves are made when necessary.

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Credit Quality And Allowance For Credit Losses (Schedule Of Nonaccrual, Reduced-Rate Loans And Foreclosed Property) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Nonaccrual loans	$ 437		$ 519
Reduced-rate loans	22	[1]	22	[1]
Total nonperforming loans	459		541
Foreclosed property	19		54
Total nonperforming assets	478		595
Retail loans
Nonaccrual loans	99		105
Reduced-rate loans	17		16
Business loans
Nonaccrual loans	338		414
Reduced-rate loans	$ 5		$ 6

[1] Reduced-rate business loans totaled $5 million and $6 million at September 30, 2013 and December 31, 2012, and reduced-rate retail loans totaled $17 million and $16 million at September 30, 2013 and December 31, 2012.

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Derivative And Credit-Related Financial Instruments (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Fair value of securities pledged as collateral for derivative assets	$ 141,000,000		$ 141,000,000
Cash deposited as collateral for derivative assets	1,000,000		1,000,000
Available-for-sale securities pledged as collateral	2,900,000,000		2,900,000,000
Cash posted as collateral	8,000,000		8,000,000		0
Aggregate fair value of all derivative instruments with credit-risk contingent features that were in a liability position	13,000,000		13,000,000
Collateral pledged for aggregate fair value of all derivative instruments with credit-risk contingent features that were in a liability position	8,000,000		8,000,000
Additional required overnight collateral on derivatives with credit-risk contingent features at period end should the credit-risk contingent features be triggered	5,000,000		5,000,000
Net interest income generated by risk management fair value interest rate swaps	18,000,000	17,000,000	54,000,000	51,000,000
Allowance for credit losses on lending-related commitments	34,000,000		34,000,000		32,000,000
Allowance for credit losses on lending-related commitments, unused commitments to extend credit	19,000,000		19,000,000		19,000,000
Latest year of contract expiration on standby and commercial letters of credit	2022		2022
Risk participation agreements covering standby and commercial letters of credit	307,000,000		307,000,000		325,000,000
Standby and commercial letters of credit	4,600,000,000		4,600,000,000		5,100,000,000
Carrying value of standby and commercial letters of credit included in accrued expenses and other liabilities	67,000,000		67,000,000		82,000,000
Deferred fees	55,000,000		55,000,000		69,000,000
Allowance for credit losses on lending-related commitments, standby and commercial letters of credit	12,000,000		12,000,000		13,000,000
Notional Amount of Derivative Credit Risk Participation Agreements	661,000,000		661,000,000		574,000,000
Maximum estimated exposure to credit risk participation agreements assuming 100% default	8,000,000		8,000,000		11,000,000
Weighted average remaining maturity of credit risk participation agreements, in years			2 years 10 months 18 days
Notional amount of the derivative contract equivalent to Visa Class B shares	780,000		780,000
Fair value of Visa derivative liability	286,000,000		286,000,000		408,000,000
Visa derivative contract [Member]
Fair value of Visa derivative liability	2,000,000		2,000,000		1,000,000
Sterling [Member]
Allowance for credit losses on lending-related commitments	0		0		0
Remaining fair value adjustment for unfunded commitments and letters of credit	1,000,000		1,000,000		2,000,000
Derivative Financial Instruments, Liabilities [Member]
Available-for-sale securities pledged as collateral	22,000,000		22,000,000
Cash posted as collateral	$ 8,000,000		$ 8,000,000

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Fair Value Measurements (Quantitative Information About Level 3 Measurements) (Details) (Recurring [Member], USD $) In Millions, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets at fair value	$ 10,157		$ 11,164
Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets at fair value	169		183
State And Municipal Securities [Member] | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets at fair value	25	[1]	23	[1]
State And Municipal Securities [Member] | Minimum | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	5.00%	[1]	6.00%	[1]
Unobservable Input, Workout period	4 years	[1]	4 years	[1]
State And Municipal Securities [Member] | Maximum | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	11.00%	[1]	10.00%	[1]
Unobservable Input, Workout period	5 years	[1]	6 years	[1]
Equity and Other Non-Debt Securities [Member] | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Total assets at fair value	$ 141	[1]	$ 156	[1]
Equity and Other Non-Debt Securities [Member] | Minimum | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	6.00%	[1]	4.00%	[1]
Unobservable Input, Workout period	2 years	[1]	2 years	[1]
Equity and Other Non-Debt Securities [Member] | Maximum | Level 3
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Unobservable Input, Discount rate	8.00%	[1]	6.00%	[1]
Unobservable Input, Workout period	3 years	[1]	4 years	[1]

[1] Auction-rate securities.

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Variable Interest Entities (VIEs) (Tables)

9 Months Ended

Sep. 30, 2013

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Impact Of VIEs On The Consolidated Statements Of Comprehensive Income

The following table summarizes the impact of these VIEs on line items on the Corporation’s consolidated statements of comprehensive income.

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Other noninterest income	$	(14	)	$	(15	)	$	(41	)	$	(43	)
Benefit for income taxes (a)	(15		)	(14		)	(43		)	(41		)

(a) Income tax credits from low income housing tax credit/historic rehabilitation tax credit partnerships.

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Derivative And Credit-Related Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2013

Derivative And Credit-Related Financial Instruments [Abstract]

Schedule Of Derivative Instruments

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 September 30, 2013 and December 31, 2012. The table excludes commitments, warrants accounted for as derivatives and a derivative related to the Corporation’s 2008 sale of its remaining ownership of Visa shares.

	September 30, 2013								December 31, 2012
			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
Risk management purposes
Derivatives designated as hedging instruments
Interest rate contracts:
Swaps - fair value - receive fixed/pay floating	$	1,450	$	221		$	—		$	1,450	$	290		$	—
Derivatives used as economic hedges
Foreign exchange contracts:
Spot, forwards and swaps	316		3			—			475		1			—
Total risk management purposes	1,766		224			—			1,925		291			—
Customer-initiated and other activities
Interest rate contracts:
Caps and floors written	544		—			3			545		—			3
Caps and floors purchased	544		3			—			545		3			—
Swaps	11,072		192			144			10,952		263			215
Total interest rate contracts	12,160		195			147			12,042		266			218
Energy contracts:
Caps and floors written	1,642		1			75			1,873		—			112
Caps and floors purchased	1,642		75			1			1,873		112			—
Swaps	2,439		52			50			1,815		61			60
Total energy contracts	5,723		128			126			5,561		173			172
Foreign exchange contracts:
Spot, forwards, options and swaps	1,798		16			13			2,253		20			18
Total customer-initiated and other activities	19,681		339			286			19,856		459			408
Total gross derivatives	$	21,447	563			286			$	21,781	750			408
Amounts offset in the consolidated balance sheets:
Netting adjustment - Offsetting derivative assets/liabilities			(227		)	(227		)			(279		)	(279		)
Netting adjustment - Cash collateral received/posted			(1		)	(8		)			(11		)	—
Net derivatives included in the consolidated balance sheets (b)			335			51					460			129
Amounts not offset in the consolidated balance sheets:
Marketable securities pledged under bilateral collateral agreements			(141		)	(12		)			(180		)	(56		)
Net derivatives after deducting amounts not offset in the consolidated balance sheets			$	194		$	39				$	280		$	73

(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 totaled $2 million and $4 million at September 30, 2013 and December 31, 2012, respectively.

Schedule Of Weighted Average Maturity And Interest Rates On Risk Management Interest Rate Swaps

The following table summarizes the expected weighted average remaining maturity of the notional amount of risk management interest rate swaps and the weighted average interest rates associated with amounts expected to be received or paid on interest rate swap agreements as of September 30, 2013 and December 31, 2012.

			Weighted Average
(dollar amounts in millions)	Notional Amount		Remaining Maturity (in years)	Receive Rate		Pay Rate (a)
September 30, 2013
Swaps - fair value - receive fixed/pay floating rate
Medium- and long-term debt designation	$	1,450	3.7	5.45	%	0.42	%
December 31, 2012
Swaps - fair value - receive fixed/pay floating rate
Medium- and long-term debt designation	1,450		4.4	5.45		0.62

(a) Variable rates paid on receive fixed swaps are based on six-month LIBOR rates in effect at September 30, 2013 and December 31, 2012.

Schedule Of Net Gains Recognized In Income On Customer-Initiated Derivatives

The net gains recognized in income on customer-initiated derivative instruments, net of the impact of offsetting positions, were as follows.

		Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	Location of Gain	2013		2012		2013		2012
Interest rate contracts	Other noninterest income	$	8	$	5	$	17	$	14
Energy contracts	Other noninterest income	—		1		2		3
Foreign exchange contracts	Foreign exchange income	8		8		26		26
Total		$	16	$	14	$	45	$	43

Schedule Of Financial Instruments With Off-Balance Sheet Credit Risk

The Corporation’s credit risk associated with these instruments is represented by the contractual amounts indicated in the following table.

(in millions)	September 30, 2013		December 31, 2012
Unused commitments to extend credit:
Commercial and other	$	27,975	$	25,659
Bankcard, revolving check credit and home equity loan commitments	1,824		1,681
Total unused commitments to extend credit	$	29,799	$	27,340
Standby letters of credit	$	4,484	$	4,985
Commercial letters of credit	96		78
Other credit-related financial instruments	2		1

Summary Of Internally Classified Watch List Letters Of Credit

The following table presents a summary of internally classified watch list standby and commercial letters of credit at September 30, 2013 and December 31, 2012. The Corporation's internal watch 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.

(dollar amounts in millions)	September 30, 2013			December 31, 2012
Total watch list standby and commercial letters of credit	$	76		$	144
As a percentage of total outstanding standby and commercial letters of credit	1.7		%	2.9		%

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Credit Quality And Allowance For Credit Losses (Aging Analysis Of Loans) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	$ 112		$ 114
60-89 days past due and still accruing	62		44
90 days or more past due and still accruing	25		23
Total past due loans and still accruing	199		181
Nonaccrual loans	437		519
Current loans	43,515	[1]	45,357	[1]
Total loans	44,151		46,057
Carrying amount PCI loans	15		36
Business loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	90		74
60-89 days past due and still accruing	55		32
90 days or more past due and still accruing	18		16
Total past due loans and still accruing	163		122
Nonaccrual loans	338		414
Current loans	39,848	[1]	41,841	[1]
Total loans	40,349		42,377
Business loans | Commercial
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	46		23
60-89 days past due and still accruing	33		19
90 days or more past due and still accruing	12		5
Total past due loans and still accruing	91		47
Nonaccrual loans	107		103
Current loans	27,699	[1]	29,363	[1]
Total loans	27,897		29,513
Business loans | Real estate construction
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	14		0
60-89 days past due and still accruing	0		0
90 days or more past due and still accruing	3		0
Total past due loans and still accruing	17		0
Nonaccrual loans	25		33
Current loans	1,510	[1]	1,207	[1]
Total loans	1,552		1,240
Business loans | Real estate construction | Commercial Real Estate business line
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	12	[2]	0	[2]
60-89 days past due and still accruing	0	[2]	0	[2]
90 days or more past due and still accruing	3	[2]	0	[2]
Total past due loans and still accruing	15	[2]	0	[2]
Nonaccrual loans	24	[2]	30	[2]
Current loans	1,244	[1],[2]	1,019	[1],[2]
Total loans	1,283	[2]	1,049	[2]
Business loans | Real estate construction | Other business lines
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	2	[3]	0	[3]
60-89 days past due and still accruing	0	[3]	0	[3]
90 days or more past due and still accruing	0	[3]	0	[3]
Total past due loans and still accruing	2	[3]	0	[3]
Nonaccrual loans	1	[3]	3	[3]
Current loans	266	[1],[3]	188	[1],[3]
Total loans	269	[3]	191	[3]
Business loans | Commercial mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	28		47
60-89 days past due and still accruing	22		13
90 days or more past due and still accruing	3		8
Total past due loans and still accruing	53		68
Nonaccrual loans	206		275
Current loans	8,526	[1]	9,129	[1]
Total loans	8,785		9,472
Business loans | Commercial mortgage | Commercial Real Estate business line
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	10	[2]	20	[2]
60-89 days past due and still accruing	13	[2]	4	[2]
90 days or more past due and still accruing	3	[2]	0	[2]
Total past due loans and still accruing	26	[2]	24	[2]
Nonaccrual loans	67	[2]	94	[2]
Current loans	1,499	[1],[2]	1,755	[1],[2]
Total loans	1,592	[2]	1,873	[2]
Business loans | Commercial mortgage | Other business lines
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	18	[3]	27	[3]
60-89 days past due and still accruing	9	[3]	9	[3]
90 days or more past due and still accruing	0	[3]	8	[3]
Total past due loans and still accruing	27	[3]	44	[3]
Nonaccrual loans	139	[3]	181	[3]
Current loans	7,027	[1],[3]	7,374	[1],[3]
Total loans	7,193	[3]	7,599	[3]
Business loans | Lease financing
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	0		0
60-89 days past due and still accruing	0		0
90 days or more past due and still accruing	0		0
Total past due loans and still accruing	0		0
Nonaccrual loans	0		3
Current loans	829	[1]	856	[1]
Total loans	829		859
Business loans | International
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	2		4
60-89 days past due and still accruing	0		0
90 days or more past due and still accruing	0		3
Total past due loans and still accruing	2		7
Nonaccrual loans	0		0
Current loans	1,284	[1]	1,286	[1]
Total loans	1,286		1,293
Retail loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	22		40
60-89 days past due and still accruing	7		12
90 days or more past due and still accruing	7		7
Total past due loans and still accruing	36		59
Nonaccrual loans	99		105
Current loans	3,667	[1]	3,516	[1]
Total loans	3,802		3,680
Retail loans | Residential mortgage
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	6		27
60-89 days past due and still accruing	3		6
90 days or more past due and still accruing	3		2
Total past due loans and still accruing	12		35
Nonaccrual loans	63		70
Current loans	1,575	[1]	1,422	[1]
Total loans	1,650		1,527
Retail loans | Consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	16		13
60-89 days past due and still accruing	4		6
90 days or more past due and still accruing	4		5
Total past due loans and still accruing	24		24
Nonaccrual loans	36		35
Current loans	2,092	[1]	2,094	[1]
Total loans	2,152		2,153
Retail loans | Consumer | Home equity
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	9		9
60-89 days past due and still accruing	2		3
90 days or more past due and still accruing	0		0
Total past due loans and still accruing	11		12
Nonaccrual loans	34		31
Current loans	1,456	[1]	1,494	[1]
Total loans	1,501		1,537
Retail loans | Consumer | Other consumer
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-59 days past due and still accruing	7		4
60-89 days past due and still accruing	2		3
90 days or more past due and still accruing	4		5
Total past due loans and still accruing	13		12
Nonaccrual loans	2		4
Current loans	636	[1]	600	[1]
Total loans	$ 651		$ 616

[1] Included purchased credit-impaired (PCI) loans with a total carrying value of $15 million and $36 million at September 30, 2013 and December 31, 2012, respectively.

[2] Primarily loans to real estate developers.

[3] Primarily loans secured by owner-occupied real estate.

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Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Dec. 31, 2012
Fair value of Visa derivative liability	$ 286			$ 286			$ 408
Commitments to fund additional investments in nonmarketable equity securities	6			6
Underlying assets of funds, estimated liquidation period, years, maximum				16 years
Federal Home Loan Bank stock	48			48			89
Federal Reserve Bank stock	85			85			85
Recurring [Member]
Fair value of warrants	2			2
Transfers into or out of Level 1 or Level 2 or Level 3	0		0	0		0
Total liabilities at fair value	380			380			497
Nonrecurring [Member]
Commitments to fund additional investments in nonmarketable equity securities							2
Total liabilities at fair value	0			0			0
Estimated Fair Value [Member]
Carrying value of nonmarketable equity securities	19	[1]		19	[1]		22	[1]
Carrying Amount [Member]
Carrying value of nonmarketable equity securities	13	[1]		13	[1]		13	[1]
Carrying value of loan servicing rights	1			1
Visa derivative contract [Member]
Fair value of Visa derivative liability	$ 2			$ 2			$ 1

[1] Included $1 million and $2 million of nonmarketable equity securities recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

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Investment Securities (Narrative) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013
Securities with no credit impairment in unrealized loss position	178
ARS portfolio redeemed or sold since acquisition	86.00%
ARS portfolio redeemed or sold since acquisition at or above cost	95.00%
Amortized cost securities	$ 9,242,000,000
Fair value securities	9,216,000,000
Carrying value of securities pledged	2,900,000,000
Liabilities secured by pledged collateral	2,000,000,000
Residential Mortgage-Backed Securities [Member]
Securities with no credit impairment in unrealized loss position	105
Amortized cost securities	9,100,000,000
Fair value securities	9,100,000,000
Equity and Other Non-Debt Securities [Member]
Securities with no credit impairment in unrealized loss position	50
State And Municipal Securities [Member]
Securities with no credit impairment in unrealized loss position	22
Corporate Debt Securities [Member]
Securities with no credit impairment in unrealized loss position	1
Auction-Rate Securities [Member]
Amortized cost securities	28,000,000
Fair value securities	$ 26,000,000

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Credit Quality And Allowance For Credit Losses (Changes In The Allowance For Loan Losses And Related Loan Amounts) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan losses	$ 8		$ 22		$ 37		$ 63
PCI loans	15				15				36
Total loans	44,151				44,151				46,057
Allowance for PCI loans	0				0				0
Business loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	40,349				40,349				42,377
Retail loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,802				3,802				3,680
Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	613		667		629		726
Loan charge-offs	(39)		(59)		(112)		(185)
Recoveries on loans previously charged-off	20		16		52		52
Net loan charge-offs	(19)		(43)		(60)		(133)
Provision for loan losses	10		23		35		54
Balance at end of period	604		647		604		647
As a percentage of total loans	1.37%		1.46%		1.37%		1.46%
Allowance for loan losses individually evaluated for impairment	67		108		67		108
Allowance for loan losses collectively evaluated for impairment	537		539		537		539
Total allowance for loan losses	604		647		604		647
Loans individually evaluated for impairment	346		591		346		591
Loans collectively evaluated for impairment	43,790		43,553		43,790		43,553
PCI loans	15	[1]	50	[1]	15	[1]	50	[1]
Total loans	44,151		44,194		44,151		44,194
Financing Receivable [Member] | Business loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	542		593		552		648
Loan charge-offs	(30)		(47)		(94)		(158)
Recoveries on loans previously charged-off	18		15		45		44
Net loan charge-offs	(12)		(32)		(49)		(114)
Provision for loan losses	5		15		32		42
Balance at end of period	535		576		535		576
As a percentage of total loans	1.32%		1.42%		1.32%		1.42%
Allowance for loan losses individually evaluated for impairment	67		107		67		107
Allowance for loan losses collectively evaluated for impairment	468		469		468		469
Total allowance for loan losses	535		576		535		576
Loans individually evaluated for impairment	294		537		294		537
Loans collectively evaluated for impairment	40,045		39,945		40,045		39,945
PCI loans	10	[1]	43	[1]	10	[1]	43	[1]
Total loans	40,349		40,525		40,349		40,525
Financing Receivable [Member] | Retail loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	71		74		77		78
Loan charge-offs	(9)		(12)		(18)		(27)
Recoveries on loans previously charged-off	2		1		7		8
Net loan charge-offs	(7)		(11)		(11)		(19)
Provision for loan losses	5		8		3		12
Balance at end of period	69		71		69		71
As a percentage of total loans	1.83%		1.94%		1.83%		1.94%
Allowance for loan losses individually evaluated for impairment	0		1		0		1
Allowance for loan losses collectively evaluated for impairment	69		70		69		70
Total allowance for loan losses	69		71		69		71
Loans individually evaluated for impairment	52		54		52		54
Loans collectively evaluated for impairment	3,745		3,608		3,745		3,608
PCI loans	5	[1]	7	[1]	5	[1]	7	[1]
Total loans	$ 3,802		$ 3,669		$ 3,802		$ 3,669

[1] No allowance for loan losses was required for PCI loans at September 30, 2013 and 2012.

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Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2013

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for the Corporation's qualified pension plan, non-qualified pension plan and postretirement benefit plan are as follows.

Qualified Defined Benefit Pension Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Service cost	$	9		$	9		$	28		$	25
Interest cost	20			19			59			59
Expected return on plan assets	(33		)	(29		)	(99		)	(85		)
Amortization of prior service cost	1			1			3			3
Amortization of net loss	18			14			56			40
Net periodic defined benefit cost	$	15		$	14		$	47		$	42

Non-Qualified Defined Benefit Pension Plan	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions)	2013		2012		2013			2012
Service cost	$	1	$	1	$	3		$	3
Interest cost	2		2		7			7
Amortization of prior service cost	—		—		(1		)	(1		)
Amortization of net loss	3		1		8			5
Net periodic defined benefit cost	$	6	$	4	$	17		$	14

Postretirement Benefit Plan	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Interest cost	$	1		$	1		$	3		$	3
Expected return on plan assets	(1		)	(1		)	(3		)	(3		)
Amortization of transition obligation	—			1			—			3
Amortization of net loss	—			—			1			1
Net periodic postretirement benefit cost	$	—		$	1		$	1		$	4

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Variable Interest Entities (VIEs) (Impact Of VIEs On The Consolidated Statements Of Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Variable Interest Entity [Line Items]
Other noninterest income	$ 28		$ 24		$ 87		$ 79
Benefit for income taxes	54		36		154		134
Variable Interest Entity
Variable Interest Entity [Line Items]
Other noninterest income	(14)		(15)		(41)		(43)
Benefit for income taxes	$ (15)	[1]	$ (14)	[1]	$ (43)	[1]	$ (41)	[1]

[1] Income tax credits from low income housing tax credit/historic rehabilitation tax credit partnerships.

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Contingent Liabilities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Commitments and Contingencies Disclosure [Abstract]
Litigation-related expense	$ (4)	$ 4	$ 0	$ 23
Legal fees	$ 5	$ 8	$ 19	$ 26

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Variable Interest Entities (VIEs) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]
Exposure to loss as a result of involvement with VIEs	$ 386
Unfunded commitments to fund tax credit entities	135
Corporation provided financial or other support not contractually required to VIEs	$ 0	$ 0

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Investment Securities (Gains And Losses On Available-For-Sale Securities) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Investments, Debt and Equity Securities [Abstract]
Securities gains			$ 1		$ 12
Securities losses			(2)	[1]	(1)	[1]
Net securities (losses) gains	$ 1	$ 0	$ (1)		$ 11

[1] Charges related to a derivative contract tied to the conversion rate of Visa Class B shares.

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Net Income Per Common Share (Schedule of Average Shares Excluded From Diluted Net Income Per Common Share Computation) (Details) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average outstanding securities	8.2	15.2	11.8	16.2
Stock Options | Minimum
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise price	41.70	31.51	34.78	30.77
Stock Options | Maximum
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Exercise price	61.94	61.94	61.94	64.50
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Average outstanding securities				0.2
Exercise price				30.36

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Credit Quality And Allowance For Credit Losses (Tables)

9 Months Ended

Sep. 30, 2013

Credit Quality And Allowance For Credit Losses [Abstract]

Aging Analysis Of Loans

The following table presents an aging analysis of the recorded balance of loans.

	Loans Past Due and Still Accruing
(in millions)	30-59 Days		60-89  Days		90 Days or More		Total		Nonaccrual Loans		Current Loans (c)		Total  Loans
September 30, 2013
Business loans:
Commercial	$	46	$	33	$	12	$	91	$	107	$	27,699	$	27,897
Real estate construction:
Commercial Real Estate business line (a)	12		—		3		15		24		1,244		1,283
Other business lines (b)	2		—		—		2		1		266		269
Total real estate construction	14		—		3		17		25		1,510		1,552
Commercial mortgage:
Commercial Real Estate business line (a)	10		13		3		26		67		1,499		1,592
Other business lines (b)	18		9		—		27		139		7,027		7,193
Total commercial mortgage	28		22		3		53		206		8,526		8,785
Lease financing	—		—		—		—		—		829		829
International	2		—		—		2		—		1,284		1,286
Total business loans	90		55		18		163		338		39,848		40,349
Retail loans:
Residential mortgage	6		3		3		12		63		1,575		1,650
Consumer:
Home equity	9		2		—		11		34		1,456		1,501
Other consumer	7		2		4		13		2		636		651
Total consumer	16		4		4		24		36		2,092		2,152
Total retail loans	22		7		7		36		99		3,667		3,802
Total loans	$	112	$	62	$	25	$	199	$	437	$	43,515	$	44,151
December 31, 2012
Business loans:
Commercial	$	23	$	19	$	5	$	47	$	103	$	29,363	$	29,513
Real estate construction:
Commercial Real Estate business line (a)	—		—		—		—		30		1,019		1,049
Other business lines (b)	—		—		—		—		3		188		191
Total real estate construction	—		—		—		—		33		1,207		1,240
Commercial mortgage:
Commercial Real Estate business line (a)	20		4		—		24		94		1,755		1,873
Other business lines (b)	27		9		8		44		181		7,374		7,599
Total commercial mortgage	47		13		8		68		275		9,129		9,472
Lease financing	—		—		—		—		3		856		859
International	4		—		3		7		—		1,286		1,293
Total business loans	74		32		16		122		414		41,841		42,377
Retail loans:
Residential mortgage	27		6		2		35		70		1,422		1,527
Consumer:
Home equity	9		3		—		12		31		1,494		1,537
Other consumer	4		3		5		12		4		600		616
Total consumer	13		6		5		24		35		2,094		2,153
Total retail loans	40		12		7		59		105		3,516		3,680
Total loans	$	114	$	44	$	23	$	181	$	519	$	45,357	$	46,057

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

(c) Included purchased credit-impaired (PCI) loans with a total carrying value of $15 million and $36 million at September 30, 2013 and December 31, 2012, respectively.

Loans By Credit Quality Indicator

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
(in millions)	Pass (a)		Special Mention (b)		Substandard (c)		Nonaccrual (d)		Total
September 30, 2013
Business loans:
Commercial	$	26,296	$	965	$	529	$	107	$	27,897
Real estate construction:
Commercial Real Estate business line (e)	1,231		13		15		24		1,283
Other business lines (f)	262		1		5		1		269
Total real estate construction	1,493		14		20		25		1,552
Commercial mortgage:
Commercial Real Estate business line (e)	1,357		107		61		67		1,592
Other business lines (f)	6,602		178		274		139		7,193
Total commercial mortgage	7,959		285		335		206		8,785
Lease financing	821		6		2		—		829
International	1,250		27		9		—		1,286
Total business loans	37,819		1,297		895		338		40,349
Retail loans:
Residential mortgage	1,576		4		7		63		1,650
Consumer:
Home equity	1,450		12		5		34		1,501
Other consumer	630		12		7		2		651
Total consumer	2,080		24		12		36		2,152
Total retail loans	3,656		28		19		99		3,802
Total loans	$	41,475	$	1,325	$	914	$	437	$	44,151
December 31, 2012
Business loans:
Commercial	$	28,032	$	820	$	558	$	103	$	29,513
Real estate construction:
Commercial Real Estate business line (e)	921		77		21		30		1,049
Other business lines (f)	176		3		9		3		191
Total real estate construction	1,097		80		30		33		1,240
Commercial mortgage:
Commercial Real Estate business line (e)	1,479		213		87		94		1,873
Other business lines (f)	6,783		258		377		181		7,599
Total commercial mortgage	8,262		471		464		275		9,472
Lease financing	840		9		7		3		859
International	1,230		57		6		—		1,293
Total business loans	39,461		1,437		1,065		414		42,377
Retail loans:
Residential mortgage	1,438		12		7		70		1,527
Consumer:
Home equity	1,489		11		6		31		1,537
Other consumer	581		22		9		4		616
Total consumer	2,070		33		15		35		2,153
Total retail loans	3,508		45		22		105		3,680
Total loans	$	42,969	$	1,482	$	1,087	$	519	$	46,057

(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. Included in the special mention category were $201 million and $303 million at September 30, 2013 and December 31, 2012, respectively, of loans proactively monitored by management that were considered “pass” 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. PCI loans are included in the substandard category. 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 - Summary of Significant Accounting Policies - on page F-59 in the Corporation's 2012 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.

Schedule Of Nonaccrual, Reduced-Rate Loans And Foreclosed Property

The following table summarizes nonperforming assets.

(in millions)	September 30, 2013		December 31, 2012
Nonaccrual loans	$	437	$	519
Reduced-rate loans (a)	22		22
Total nonperforming loans	459		541
Foreclosed property	19		54
Total nonperforming assets	$	478	$	595

(a) Reduced-rate business loans totaled $5 million and $6 million at September 30, 2013 and December 31, 2012, and reduced-rate retail loans totaled $17 million and $16 million at September 30, 2013 and December 31, 2012.

Changes In The Allowance For Loan Losses And Related Loan Amounts

The following table details the changes in the allowance for loan losses and related loan amounts.

	2013									2012
(in millions)	Business Loans			Retail Loans			Total			Business Loans			Retail Loans			Total
Three Months Ended September 30
Allowance for loan losses:
Balance at beginning of period	$	542		$	71		$	613		$	593		$	74		$	667
Loan charge-offs	(30		)	(9		)	(39		)	(47		)	(12		)	(59		)
Recoveries on loans previously charged-off	18			2			20			15			1			16
Net loan charge-offs	(12		)	(7		)	(19		)	(32		)	(11		)	(43		)
Provision for loan losses	5			5			10			15			8			23
Balance at end of period	$	535		$	69		$	604		$	576		$	71		$	647
Nine Months Ended September 30
Allowance for loan losses:
Balance at beginning of period	$	552		$	77		$	629		$	648		$	78		$	726
Loan charge-offs	(94		)	(18		)	(112		)	(158		)	(27		)	(185		)
Recoveries on loans previously charged-off	45			7			52			44			8			52
Net loan charge-offs	(49		)	(11		)	(60		)	(114		)	(19		)	(133		)
Provision for loan losses	32			3			35			42			12			54
Balance at end of period	$	535		$	69		$	604		$	576		$	71		$	647
As a percentage of total loans	1.32		%	1.83		%	1.37		%	1.42		%	1.94		%	1.46		%
September 30
Allowance for loan losses:
Individually evaluated for impairment	$	67		$	—		$	67		$	107		$	1		$	108
Collectively evaluated for impairment	468			69			537			469			70			539
Total allowance for loan losses	$	535		$	69		$	604		$	576		$	71		$	647
Loans:
Individually evaluated for impairment	$	294		$	52		$	346		$	537		$	54		$	591
Collectively evaluated for impairment	40,045			3,745			43,790			39,945			3,608			43,553
PCI loans (a)	10			5			15			43			7			50
Total loans evaluated for impairment	$	40,349		$	3,802		$	44,151		$	40,525		$	3,669		$	44,194

(a)    No allowance for loan losses was required for PCI loans at September 30, 2013 and 2012.

Changes In the Allowance For Credit Losses On Lending-Related Commitments

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 September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013		2012
Balance at beginning of period	$	36		$	36		$	32	$	26
Provision for credit losses on lending-related commitments	(2		)	(1		)	2		9
Balance at end of period	$	34		$	35		$	34	$	35

Individually Evaluated Impaired Loans

The following table presents additional information regarding individually evaluated impaired loans.

	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
September 30, 2013
Business loans:
Commercial	$	10	$	85	$	95	$	173	$	28
Real estate construction:
Commercial Real Estate business line (a)	—		23		23		28		4
Other business lines (b)	—		—		—		1		—
Total real estate construction	—		23		23		29		4
Commercial mortgage:
Commercial Real Estate business line (a)	—		74		74		117		12
Other business lines (b)	2		100		102		137		23
Total commercial mortgage	2		174		176		254		35
Total business loans	12		282		294		456		67
Retail loans:
Residential mortgage	38		—		38		45		—
Consumer:
Home equity	10		—		10		16		—
Other consumer	4		—		4		11		—
Total consumer	14		—		14		27		—
Total retail loans (c)	52		—		52		72		—
Total individually evaluated impaired loans	$	64	$	282	$	346	$	528	$	67
December 31, 2012
Business loans:
Commercial	$	2	$	117	$	119	$	207	$	26
Real estate construction:
Commercial Real Estate business line (a)	—		26		26		31		4
Other business lines (b)	—		—		—		1		—
Total real estate construction	—		26		26		32		4
Commercial mortgage:
Commercial Real Estate business line (a)	—		99		99		159		18
Other business lines (b)	—		122		122		167		28
Total commercial mortgage	—		221		221		326		46
Lease financing	—		2		2		5		—
Total business loans	2		366		368		570		76
Retail loans:
Residential mortgage	39		—		39		48		—
Consumer:
Home equity	8		—		8		10		—
Other consumer	4		—		4		10		—
Total consumer	12		—		12		20		—
Total retail loans (c)	51		—		51		68		—
Total individually evaluated impaired loans	$	53	$	366	$	419	$	638	$	76

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

(c) Individually evaluated retail loans had no related allowance for loan losses, primarily due to policy changes which resulted in direct write-downs of restructured retail loans.

Average Individually Evaluated Impaired Loans And Related Interest Recognized

The following table presents information regarding average individually evaluated impaired loans and the related interest recognized. Interest income recognized for the period primarily related to reduced-rate loans.

	Individually Evaluated Impaired Loans
	2013				2012
(in millions)	Average Balance for the Period		Interest Income Recognized for the Period		Average Balance for the Period		Interest Income Recognized for the Period
Three Months Ended September 30
Business loans:
Commercial	$	96	$	—	$	193	$	1
Real estate construction:
Commercial Real Estate business line (a)	24		—		48		—
Other business lines (b)	—		—		4		—
Total real estate construction	24		—		52		—
Commercial mortgage:
Commercial Real Estate business line (a)	78		—		135		—
Other business lines (b)	106		1		170		1
Total commercial mortgage	184		1		305		1
Lease financing	—		—		3		—
Total business loans	304		1		553		2
Retail loans:
Residential mortgage	35		—		40		—
Consumer loans:
Home equity	8		—		5		—
Other consumer	4		—		3		—
Total consumer	12		—		8		—
Total retail loans	47		—		48		—
Total individually evaluated impaired loans	$	351	$	1	$	601	$	2
Nine Months Ended September 30
Business loans:
Commercial	$	105	$	2	$	215	$	3
Real estate construction:
Commercial Real Estate business line (a)	25		—		66		—
Other business lines (b)	—		—		5		—
Total real estate construction	25		—		71		—
Commercial mortgage:
Commercial Real Estate business line (a)	87		—		149		—
Other business lines (b)	114		2		191		3
Total commercial mortgage	201		2		340		3
Lease financing	1		—		3		—
International	—		—		3		—
Total business loans	332		4		632		6
Retail loans:
Residential mortgage	36		—		42		—
Consumer:
Home equity	7		—		4		—
Other consumer	4		—		3		—
Total consumer	11		—		7		—
Total retail loans	47		—		49		—
Total individually evaluated impaired loans	$	379	$	4	$	681	$	6

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

Troubled Debt Restructurings By Type Of Modification

The following tables detail the recorded balance at September 30, 2013 and 2012 of loans considered to be TDRs that were restructured during the three- and nine-month periods ended September 30, 2013 and 2012, by type of modification. In cases of loans with more than one type of modification, the loans were categorized based on the most significant modification.

	2013									2012
	Type of Modification									Type of Modification
(in millions)	Principal Deferrals (a)			Interest Rate Reductions		AB Note Restructures (b)		Total Modifications		Principal Deferrals (a)			Interest Rate Reductions		AB Note Restructures (b)		Total Modifications
Three Months Ended September 30
Business loans:
Commercial	$	3		$	—	$	—	$	3	$	3		$	—	$	—	$	3
Commercial mortgage:
Commercial Real Estate business line (c)	14			—		—		14		8			—		19		27
Other business lines (d)	4			—		—		4		2			—		—		2
Total commercial mortgage	18			—		—		18		10			—		19		29
Total business loans	21			—		—		21		13			—		19		32
Retail loans:
Residential mortgage	—			1		—		1		8		(e)	—		—		8
Consumer:
Home equity	4		(e)	1		—		5		—			—		—		—
Other consumer	2		(e)	—		—		2		—			—		—		—
Total consumer	6			1		—		7		—			—		—		—
Total retail loans	6			2		—		8		8			—		—		8
Total loans	$	27		$	2	$	—	$	29	$	21		$	—	$	19	$	40
Nine Months Ended September 30
Business loans:
Commercial	$	13		$	—	$	8	$	21	$	17		$	1	$	—	$	18
Real estate construction:
Other business lines (d)	—			—		—		—		1			—		—		1
Total real estate construction	—			—		—		—		1			—		—		1
Commercial mortgage:
Commercial Real Estate business line (c)	33			—		—		33		23			—		22		45
Other business lines (d)	15			—		11		26		15			2		—		17
Total commercial mortgage	48			—		11		59		38			2		22		62
Total business loans	61			—		19		80		56			3		22		81
Retail loans:
Residential mortgage	1		(e)	2		—		3		8		(e)	1		—		9
Consumer:
Home equity	6		(e)	1		—		7		—			—		—		—
Other consumer	2		(e)	1		—		3		—			—		—		—
Total consumer	8			2		—		10		—			—		—		—
Total retail loans	9			4		—		13		8			1		—		9
Total loans	$	70		$	4	$	19	$	93	$	64		$	4	$	22	$	90

(a) Primarily represents loan balances where terms were extended 90 days or more at or above contractual interest rates.

(b) Loan restructurings whereby the original loan is restructured into two notes: an "A" note, which generally reflects the portion of the modified loan which is expected to be collected; and a "B" note, which is either fully charged off or exchanged for an equity interest.

(c) Primarily loans to real estate developers.

(d) Primarily loans secured by owner-occupied real estate.

(e) Includes bankruptcy loans for which the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt.

Troubled Debt Restructuring Subsequent Default

The following table presents information regarding the recorded balance at September 30, 2013 and 2012 of loans modified by principal deferral during the twelve months ended September 30, 2013 and 2012, and those principal deferrals which experienced a subsequent default during the three- and nine-month periods ended September 30, 2013 and 2012. 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.

	2013							2012
(in millions)	Balance at September 30			Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30		Balance at September 30			Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30
Principal deferrals:
Business loans:
Commercial	$	13		$	2	$	11	$	31		$	5	$	12
Real estate construction:
Commercial Real Estate business line (a)	1			—		—		1			—		1
Total real estate construction	1			—		—		1			—		1
Commercial mortgage:
Commercial Real Estate business line (a)	34			—		20		30			14		29
Other business lines (b)	20			2		11		27			2		9
Total commercial mortgage	54			2		31		57			16		38
Total business loans	68			4		42		89			21		51
Retail loans:
Residential mortgage	3		(c)	—		—		8		(c)	3		3
Consumer:
Home equity	7		(c)	—		—		—			—		—
Other consumer	3		(c)	—		—		—			—		—
Total consumer	10			—		—		—			—		—
Total retail loans	13			—		—		8			3		3
Total principal deferrals	$	81		$	4	$	42	$	97		$	24	$	54

(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.

The following table presents information regarding the recorded balance at September 30, 2013 and 2012 of loans modified by interest rate reduction during the twelve months ended September 30, 2013 and 2012, and those reduced-rate loans which experienced a subsequent default during the three- and nine-month periods ended September 30, 2013 and 2012. For reduced-rate loans, a subsequent payment default is defined in terms of delinquency, when a principal or interest payment is 90 days past due.

	2013						2012
(in millions)	Balance at September 30		Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30		Balance at September 30		Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30
Interest rate reductions:
Business loans:
Commercial	$	—	$	—	$	—	$	1	$	1	$	1
Commercial mortgage:
Other business lines (a)	—		—		—		14		—		12
Total commercial mortgage	—		—		—		14		—		12
Lease financing	—		—		—		3		—		—
Total business loans	—		—		—		18		1		13
Retail loans:
Residential mortgage	2		—		—		4		—		—
Consumer:
Home equity	1		—		—		—		—		—
Other consumer	1		—		—		—		—		—
Total consumer	2		—		—		—		—		—
Total retail loans	4		—		—		4		—		—
Total interest rate reductions	$	4	$	—	$	—	$	22	$	1	$	13

(a) Primarily loans secured by owner-occupied real estate.

During the twelve months ended September 30, 2013 and 2012 loans with a carrying value of $19 million and $29 million at September 30, 2013 and 2012, respectively, were restructured into two notes (AB note restructures). For AB note restructures, a subsequent payment default is defined in terms of delinquency, when a principal or interest payment is 90 days past due. There were no subsequent payment defaults of AB note restructures during both the three- and nine-month periods ended September 30, 2013 and 2012.

Acquired Purchased Credit-Impaired Loans

The carrying amount of acquired PCI loans included in the consolidated balance sheet and the related outstanding balance at September 30, 2013 and December 31, 2012 were as follows. The outstanding balance represents the total amount owed as of September 30, 2013 and December 31, 2012, including accrued but unpaid interest and any amounts previously charged off. No allowance for loan losses was required on the acquired PCI loan pools at both September 30, 2013 and December 31, 2012.

(in millions)	September 30, 2013		December 31, 2012
Acquired PCI loans:
Carrying amount	$	15	$	36
Outstanding balance	99		138

Accretable Yield For Acquired Purchased Credit-Impaired Loans

anges in the accretable yield for acquired PCI loans for the three- and nine-month periods ended September 30, 2013 and 2012 were as follows.

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Balance at beginning of period	$	10		$	16		$	16		$	25
Reclassifications from nonaccretable	4			—			4			—
Accretion	(3		)	(3		)	(9		)	(12		)
Balance at end of period	$	11		$	13		$	11		$	13

XML

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock, per share	$ 0.17	$ 0.15	$ 0.51	$ 0.40

XML

Basis of Presentation and Accounting Policies

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Basis of Presentation and Accounting Policies

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 nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. 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, 2012.

Allowance for Loan Losses

The allowance for loan losses represents management’s assessment of probable, estimable losses inherent in the Corporation’s loan portfolio. The allowance for loan losses includes specific allowances, based on individual evaluations of certain loans, and allowances for homogeneous pools of loans with similar risk characteristics.

The allowance for business loans which do not meet the criteria to be evaluated individually is determined by applying standard reserve factors to the pool of business loans within each internal risk rating. In the first quarter 2013, the Corporation enhanced the approach utilized for determining standard reserve factors by changing from a dollar-based migration method for developing probability of default statistics to a count-based method. Under the dollar-based method, each dollar that moved to default received equal weight in the determination of standard reserve factors for each internal risk rating. As a result, the movement of larger loans impacted standard reserve factors more than the movement of smaller loans. By moving to a count-based approach, where each loan that moves to default receives equal weighting, unusually large or small loans will not have a disproportionate influence on the standard reserve factors. The change resulted in a $40 million increase to the allowance for loan losses at March 31, 2013.

Recently Adopted Accounting Pronouncements

In the first quarter 2013, the Corporation adopted amendments to GAAP which require enhanced disclosures about the nature and effect or potential effect of an entity's rights of setoff associated with its derivative and certain other financial instruments. The required disclosures are provided in Note 5 to these unaudited financial statements.

In the third quarter 2013, the Financial Accounting Standards Board (FASB) issued an amendment to GAAP which permits the Overnight Index Swap Rate, also referred to as the Fed Funds Effective Swap Rate, to be used as a benchmark interest rate for hedge accounting purposes, effective for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. The amendment also removed the restriction on using different benchmark rates for similar hedges. While the adoption of this amendment had no impact on the Corporation's financial condition and results of operations, to the extent to Corporation enters into new (or redesignates existing) hedging relationships in the future, the Overnight Index Swap Rate will be included in the spectrum of available benchmark interest rates for hedge accounting.

Pending Accounting Pronouncements

In July 2013, the FASB issued Accounting Standards Update (ASU) No. 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists,” (ASU 2013-11). ASU 2013-11 requires an unrecognized tax benefit be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward (collectively referred to as a “tax attribute carryforward”), unless the jurisdiction from which the tax attribute carryforward arose does not allow for such treatment. To the extent that a company does not have a tax attribute carryforward as of the reporting date, the unrecognized tax benefit is to be reported as a liability. The Corporation will adopt ASU 2013-11 in the first quarter 2014. The Corporation does not expect the adoption of ASU 2013-11 to have a material effect on the Corporation's financial condition and results of operations.

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Credit Quality And Allowance For Credit Losses

9 Months Ended

Sep. 30, 2013

Credit Quality And Allowance For Credit Losses [Abstract]

Credit Quality And Allowance For Credit Losses

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
(in millions)	30-59 Days		60-89  Days		90 Days or More		Total		Nonaccrual Loans		Current Loans (c)		Total  Loans
September 30, 2013
Business loans:
Commercial	$	46	$	33	$	12	$	91	$	107	$	27,699	$	27,897
Real estate construction:
Commercial Real Estate business line (a)	12		—		3		15		24		1,244		1,283
Other business lines (b)	2		—		—		2		1		266		269
Total real estate construction	14		—		3		17		25		1,510		1,552
Commercial mortgage:
Commercial Real Estate business line (a)	10		13		3		26		67		1,499		1,592
Other business lines (b)	18		9		—		27		139		7,027		7,193
Total commercial mortgage	28		22		3		53		206		8,526		8,785
Lease financing	—		—		—		—		—		829		829
International	2		—		—		2		—		1,284		1,286
Total business loans	90		55		18		163		338		39,848		40,349
Retail loans:
Residential mortgage	6		3		3		12		63		1,575		1,650
Consumer:
Home equity	9		2		—		11		34		1,456		1,501
Other consumer	7		2		4		13		2		636		651
Total consumer	16		4		4		24		36		2,092		2,152
Total retail loans	22		7		7		36		99		3,667		3,802
Total loans	$	112	$	62	$	25	$	199	$	437	$	43,515	$	44,151
December 31, 2012
Business loans:
Commercial	$	23	$	19	$	5	$	47	$	103	$	29,363	$	29,513
Real estate construction:
Commercial Real Estate business line (a)	—		—		—		—		30		1,019		1,049
Other business lines (b)	—		—		—		—		3		188		191
Total real estate construction	—		—		—		—		33		1,207		1,240
Commercial mortgage:
Commercial Real Estate business line (a)	20		4		—		24		94		1,755		1,873
Other business lines (b)	27		9		8		44		181		7,374		7,599
Total commercial mortgage	47		13		8		68		275		9,129		9,472
Lease financing	—		—		—		—		3		856		859
International	4		—		3		7		—		1,286		1,293
Total business loans	74		32		16		122		414		41,841		42,377
Retail loans:
Residential mortgage	27		6		2		35		70		1,422		1,527
Consumer:
Home equity	9		3		—		12		31		1,494		1,537
Other consumer	4		3		5		12		4		600		616
Total consumer	13		6		5		24		35		2,094		2,153
Total retail loans	40		12		7		59		105		3,516		3,680
Total loans	$	114	$	44	$	23	$	181	$	519	$	45,357	$	46,057

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

(c) Included purchased credit-impaired (PCI) loans with a total carrying value of $15 million and $36 million at September 30, 2013 and December 31, 2012, respectively.

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
(in millions)	Pass (a)		Special Mention (b)		Substandard (c)		Nonaccrual (d)		Total
September 30, 2013
Business loans:
Commercial	$	26,296	$	965	$	529	$	107	$	27,897
Real estate construction:
Commercial Real Estate business line (e)	1,231		13		15		24		1,283
Other business lines (f)	262		1		5		1		269
Total real estate construction	1,493		14		20		25		1,552
Commercial mortgage:
Commercial Real Estate business line (e)	1,357		107		61		67		1,592
Other business lines (f)	6,602		178		274		139		7,193
Total commercial mortgage	7,959		285		335		206		8,785
Lease financing	821		6		2		—		829
International	1,250		27		9		—		1,286
Total business loans	37,819		1,297		895		338		40,349
Retail loans:
Residential mortgage	1,576		4		7		63		1,650
Consumer:
Home equity	1,450		12		5		34		1,501
Other consumer	630		12		7		2		651
Total consumer	2,080		24		12		36		2,152
Total retail loans	3,656		28		19		99		3,802
Total loans	$	41,475	$	1,325	$	914	$	437	$	44,151
December 31, 2012
Business loans:
Commercial	$	28,032	$	820	$	558	$	103	$	29,513
Real estate construction:
Commercial Real Estate business line (e)	921		77		21		30		1,049
Other business lines (f)	176		3		9		3		191
Total real estate construction	1,097		80		30		33		1,240
Commercial mortgage:
Commercial Real Estate business line (e)	1,479		213		87		94		1,873
Other business lines (f)	6,783		258		377		181		7,599
Total commercial mortgage	8,262		471		464		275		9,472
Lease financing	840		9		7		3		859
International	1,230		57		6		—		1,293
Total business loans	39,461		1,437		1,065		414		42,377
Retail loans:
Residential mortgage	1,438		12		7		70		1,527
Consumer:
Home equity	1,489		11		6		31		1,537
Other consumer	581		22		9		4		616
Total consumer	2,070		33		15		35		2,153
Total retail loans	3,508		45		22		105		3,680
Total loans	$	42,969	$	1,482	$	1,087	$	519	$	46,057

(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. Included in the special mention category were $201 million and $303 million at September 30, 2013 and December 31, 2012, respectively, of loans proactively monitored by management that were considered “pass” 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. PCI loans are included in the substandard category. 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 - Summary of Significant Accounting Policies - on page F-59 in the Corporation's 2012 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.

The following table summarizes nonperforming assets.

(in millions)	September 30, 2013		December 31, 2012
Nonaccrual loans	$	437	$	519
Reduced-rate loans (a)	22		22
Total nonperforming loans	459		541
Foreclosed property	19		54
Total nonperforming assets	$	478	$	595

(a) Reduced-rate business loans totaled $5 million and $6 million at September 30, 2013 and December 31, 2012, and reduced-rate retail loans totaled $17 million and $16 million at September 30, 2013 and December 31, 2012.

Allowance for Credit Losses

The following table details the changes in the allowance for loan losses and related loan amounts.

	2013									2012
(in millions)	Business Loans			Retail Loans			Total			Business Loans			Retail Loans			Total
Three Months Ended September 30
Allowance for loan losses:
Balance at beginning of period	$	542		$	71		$	613		$	593		$	74		$	667
Loan charge-offs	(30		)	(9		)	(39		)	(47		)	(12		)	(59		)
Recoveries on loans previously charged-off	18			2			20			15			1			16
Net loan charge-offs	(12		)	(7		)	(19		)	(32		)	(11		)	(43		)
Provision for loan losses	5			5			10			15			8			23
Balance at end of period	$	535		$	69		$	604		$	576		$	71		$	647
Nine Months Ended September 30
Allowance for loan losses:
Balance at beginning of period	$	552		$	77		$	629		$	648		$	78		$	726
Loan charge-offs	(94		)	(18		)	(112		)	(158		)	(27		)	(185		)
Recoveries on loans previously charged-off	45			7			52			44			8			52
Net loan charge-offs	(49		)	(11		)	(60		)	(114		)	(19		)	(133		)
Provision for loan losses	32			3			35			42			12			54
Balance at end of period	$	535		$	69		$	604		$	576		$	71		$	647
As a percentage of total loans	1.32		%	1.83		%	1.37		%	1.42		%	1.94		%	1.46		%
September 30
Allowance for loan losses:
Individually evaluated for impairment	$	67		$	—		$	67		$	107		$	1		$	108
Collectively evaluated for impairment	468			69			537			469			70			539
Total allowance for loan losses	$	535		$	69		$	604		$	576		$	71		$	647
Loans:
Individually evaluated for impairment	$	294		$	52		$	346		$	537		$	54		$	591
Collectively evaluated for impairment	40,045			3,745			43,790			39,945			3,608			43,553
PCI loans (a)	10			5			15			43			7			50
Total loans evaluated for impairment	$	40,349		$	3,802		$	44,151		$	40,525		$	3,669		$	44,194

(a)    No allowance for loan losses was required for PCI loans at September 30, 2013 and 2012.

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 September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013		2012
Balance at beginning of period	$	36		$	36		$	32	$	26
Provision for credit losses on lending-related commitments	(2		)	(1		)	2		9
Balance at end of period	$	34		$	35		$	34	$	35

Individually Evaluated Impaired Loans

The following table presents additional information regarding individually evaluated impaired loans.

	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
September 30, 2013
Business loans:
Commercial	$	10	$	85	$	95	$	173	$	28
Real estate construction:
Commercial Real Estate business line (a)	—		23		23		28		4
Other business lines (b)	—		—		—		1		—
Total real estate construction	—		23		23		29		4
Commercial mortgage:
Commercial Real Estate business line (a)	—		74		74		117		12
Other business lines (b)	2		100		102		137		23
Total commercial mortgage	2		174		176		254		35
Total business loans	12		282		294		456		67
Retail loans:
Residential mortgage	38		—		38		45		—
Consumer:
Home equity	10		—		10		16		—
Other consumer	4		—		4		11		—
Total consumer	14		—		14		27		—
Total retail loans (c)	52		—		52		72		—
Total individually evaluated impaired loans	$	64	$	282	$	346	$	528	$	67
December 31, 2012
Business loans:
Commercial	$	2	$	117	$	119	$	207	$	26
Real estate construction:
Commercial Real Estate business line (a)	—		26		26		31		4
Other business lines (b)	—		—		—		1		—
Total real estate construction	—		26		26		32		4
Commercial mortgage:
Commercial Real Estate business line (a)	—		99		99		159		18
Other business lines (b)	—		122		122		167		28
Total commercial mortgage	—		221		221		326		46
Lease financing	—		2		2		5		—
Total business loans	2		366		368		570		76
Retail loans:
Residential mortgage	39		—		39		48		—
Consumer:
Home equity	8		—		8		10		—
Other consumer	4		—		4		10		—
Total consumer	12		—		12		20		—
Total retail loans (c)	51		—		51		68		—
Total individually evaluated impaired loans	$	53	$	366	$	419	$	638	$	76

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

(c) Individually evaluated retail loans had no related allowance for loan losses, primarily due to policy changes which resulted in direct write-downs of restructured retail loans. 

The following table presents information regarding average individually evaluated impaired loans and the related interest recognized. Interest income recognized for the period primarily related to reduced-rate loans.

	Individually Evaluated Impaired Loans
	2013				2012
(in millions)	Average Balance for the Period		Interest Income Recognized for the Period		Average Balance for the Period		Interest Income Recognized for the Period
Three Months Ended September 30
Business loans:
Commercial	$	96	$	—	$	193	$	1
Real estate construction:
Commercial Real Estate business line (a)	24		—		48		—
Other business lines (b)	—		—		4		—
Total real estate construction	24		—		52		—
Commercial mortgage:
Commercial Real Estate business line (a)	78		—		135		—
Other business lines (b)	106		1		170		1
Total commercial mortgage	184		1		305		1
Lease financing	—		—		3		—
Total business loans	304		1		553		2
Retail loans:
Residential mortgage	35		—		40		—
Consumer loans:
Home equity	8		—		5		—
Other consumer	4		—		3		—
Total consumer	12		—		8		—
Total retail loans	47		—		48		—
Total individually evaluated impaired loans	$	351	$	1	$	601	$	2
Nine Months Ended September 30
Business loans:
Commercial	$	105	$	2	$	215	$	3
Real estate construction:
Commercial Real Estate business line (a)	25		—		66		—
Other business lines (b)	—		—		5		—
Total real estate construction	25		—		71		—
Commercial mortgage:
Commercial Real Estate business line (a)	87		—		149		—
Other business lines (b)	114		2		191		3
Total commercial mortgage	201		2		340		3
Lease financing	1		—		3		—
International	—		—		3		—
Total business loans	332		4		632		6
Retail loans:
Residential mortgage	36		—		42		—
Consumer:
Home equity	7		—		4		—
Other consumer	4		—		3		—
Total consumer	11		—		7		—
Total retail loans	47		—		49		—
Total individually evaluated impaired loans	$	379	$	4	$	681	$	6

(a) Primarily loans to real estate developers.

(b) Primarily loans secured by owner-occupied real estate.

Troubled Debt Restructurings

The following tables detail the recorded balance at September 30, 2013 and 2012 of loans considered to be TDRs that were restructured during the three- and nine-month periods ended September 30, 2013 and 2012, by type of modification. In cases of loans with more than one type of modification, the loans were categorized based on the most significant modification.

	2013									2012
	Type of Modification									Type of Modification
(in millions)	Principal Deferrals (a)			Interest Rate Reductions		AB Note Restructures (b)		Total Modifications		Principal Deferrals (a)			Interest Rate Reductions		AB Note Restructures (b)		Total Modifications
Three Months Ended September 30
Business loans:
Commercial	$	3		$	—	$	—	$	3	$	3		$	—	$	—	$	3
Commercial mortgage:
Commercial Real Estate business line (c)	14			—		—		14		8			—		19		27
Other business lines (d)	4			—		—		4		2			—		—		2
Total commercial mortgage	18			—		—		18		10			—		19		29
Total business loans	21			—		—		21		13			—		19		32
Retail loans:
Residential mortgage	—			1		—		1		8		(e)	—		—		8
Consumer:
Home equity	4		(e)	1		—		5		—			—		—		—
Other consumer	2		(e)	—		—		2		—			—		—		—
Total consumer	6			1		—		7		—			—		—		—
Total retail loans	6			2		—		8		8			—		—		8
Total loans	$	27		$	2	$	—	$	29	$	21		$	—	$	19	$	40
Nine Months Ended September 30
Business loans:
Commercial	$	13		$	—	$	8	$	21	$	17		$	1	$	—	$	18
Real estate construction:
Other business lines (d)	—			—		—		—		1			—		—		1
Total real estate construction	—			—		—		—		1			—		—		1
Commercial mortgage:
Commercial Real Estate business line (c)	33			—		—		33		23			—		22		45
Other business lines (d)	15			—		11		26		15			2		—		17
Total commercial mortgage	48			—		11		59		38			2		22		62
Total business loans	61			—		19		80		56			3		22		81
Retail loans:
Residential mortgage	1		(e)	2		—		3		8		(e)	1		—		9
Consumer:
Home equity	6		(e)	1		—		7		—			—		—		—
Other consumer	2		(e)	1		—		3		—			—		—		—
Total consumer	8			2		—		10		—			—		—		—
Total retail loans	9			4		—		13		8			1		—		9
Total loans	$	70		$	4	$	19	$	93	$	64		$	4	$	22	$	90

(a) Primarily represents loan balances where terms were extended 90 days or more at or above contractual interest rates.

(b) Loan restructurings whereby the original loan is restructured into two notes: an "A" note, which generally reflects the portion of the modified loan which is expected to be collected; and a "B" note, which is either fully charged off or exchanged for an equity interest.

(c) Primarily loans to real estate developers.

(d) Primarily loans secured by owner-occupied real estate.

(e) Includes bankruptcy loans for which the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt.

At September 30, 2013 and December 31, 2012, commitments to lend additional funds to borrowers whose terms have been modified in TDRs totaled $3 million and $5 million, respectively.

The majority of the modifications considered to be TDRs that occurred during the three- and nine-month periods ended September 30, 2013 and 2012 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 three- and nine-month periods ended September 30, 2013 and 2012 were insignificant.

On an ongoing basis, the Corporation monitors the performance of modified loans to their restructured terms. In the event of a subsequent default, the allowance for loan losses continues to be reassessed on the basis of an individual evaluation of the loan.

The following table presents information regarding the recorded balance at September 30, 2013 and 2012 of loans modified by principal deferral during the twelve months ended September 30, 2013 and 2012, and those principal deferrals which experienced a subsequent default during the three- and nine-month periods ended September 30, 2013 and 2012. 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.

	2013							2012
(in millions)	Balance at September 30			Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30		Balance at September 30			Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30
Principal deferrals:
Business loans:
Commercial	$	13		$	2	$	11	$	31		$	5	$	12
Real estate construction:
Commercial Real Estate business line (a)	1			—		—		1			—		1
Total real estate construction	1			—		—		1			—		1
Commercial mortgage:
Commercial Real Estate business line (a)	34			—		20		30			14		29
Other business lines (b)	20			2		11		27			2		9
Total commercial mortgage	54			2		31		57			16		38
Total business loans	68			4		42		89			21		51
Retail loans:
Residential mortgage	3		(c)	—		—		8		(c)	3		3
Consumer:
Home equity	7		(c)	—		—		—			—		—
Other consumer	3		(c)	—		—		—			—		—
Total consumer	10			—		—		—			—		—
Total retail loans	13			—		—		8			3		3
Total principal deferrals	$	81		$	4	$	42	$	97		$	24	$	54

(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.

The following table presents information regarding the recorded balance at September 30, 2013 and 2012 of loans modified by interest rate reduction during the twelve months ended September 30, 2013 and 2012, and those reduced-rate loans which experienced a subsequent default during the three- and nine-month periods ended September 30, 2013 and 2012. For reduced-rate loans, a subsequent payment default is defined in terms of delinquency, when a principal or interest payment is 90 days past due.

	2013						2012
(in millions)	Balance at September 30		Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30		Balance at September 30		Subsequent Default in the Three Months Ended September 30		Subsequent Default in the Nine Months Ended September 30
Interest rate reductions:
Business loans:
Commercial	$	—	$	—	$	—	$	1	$	1	$	1
Commercial mortgage:
Other business lines (a)	—		—		—		14		—		12
Total commercial mortgage	—		—		—		14		—		12
Lease financing	—		—		—		3		—		—
Total business loans	—		—		—		18		1		13
Retail loans:
Residential mortgage	2		—		—		4		—		—
Consumer:
Home equity	1		—		—		—		—		—
Other consumer	1		—		—		—		—		—
Total consumer	2		—		—		—		—		—
Total retail loans	4		—		—		4		—		—
Total interest rate reductions	$	4	$	—	$	—	$	22	$	1	$	13

(a) Primarily loans secured by owner-occupied real estate.

During the twelve months ended September 30, 2013 and 2012 loans with a carrying value of $19 million and $29 million at September 30, 2013 and 2012, respectively, were restructured into two notes (AB note restructures). For AB note restructures, a subsequent payment default is defined in terms of delinquency, when a principal or interest payment is 90 days past due. There were no subsequent payment defaults of AB note restructures during both the three- and nine-month periods ended September 30, 2013 and 2012.

Purchased Credit-Impaired Loans

Acquired loans are initially recorded at fair value with no carryover of any allowance for loan losses.

Loans acquired with evidence of credit quality deterioration at acquisition for which it was probable that the Corporation would not be able to collect all contractual amounts due were accounted for as PCI loans. The Corporation aggregated the acquired PCI loans into pools of loans based on common risk characteristics.

The carrying amount of acquired PCI loans included in the consolidated balance sheet and the related outstanding balance at September 30, 2013 and December 31, 2012 were as follows. The outstanding balance represents the total amount owed as of September 30, 2013 and December 31, 2012, including accrued but unpaid interest and any amounts previously charged off. No allowance for loan losses was required on the acquired PCI loan pools at both September 30, 2013 and December 31, 2012.

(in millions)	September 30, 2013		December 31, 2012
Acquired PCI loans:
Carrying amount	$	15	$	36
Outstanding balance	99		138

Changes in the accretable yield for acquired PCI loans for the three- and nine-month periods ended September 30, 2013 and 2012 were as follows.

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Balance at beginning of period	$	10		$	16		$	16		$	25
Reclassifications from nonaccretable	4			—			4			—
Accretion	(3		)	(3		)	(9		)	(12		)
Balance at end of period	$	11		$	13		$	11		$	13

XML

Business Segment Information (Narrative) (Details)	9 Months Ended
	Sep. 30, 2013 markets segments
Segment Reporting [Abstract]
Number of Major Business Segments	3
Number of Primary Market Segments	3

XML

Fair Value Measurements

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

The Corporation utilizes fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The determination of fair values of financial instruments often requires the use of estimates. In cases where quoted market values in an active market are not available, the Corporation uses present value techniques and other valuation methods to estimate the fair values of its financial instruments. These valuation methods require considerable judgment and the resulting estimates of fair value can be significantly affected by the assumptions made and methods used.

Fair value is an estimate of the exchange price that would be received to sell an asset or paid to transfer a liability in an orderly transaction (i.e., not a forced transaction, such as a liquidation or distressed sale) between market participants at the measurement date. However, the calculated fair value estimates in many instances cannot be substantiated by comparison to independent markets and, in many cases, may not be realizable in a current sale of the financial instrument.

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

The Corporation categorizes assets and liabilities recorded at fair value on a recurring or nonrecurring basis and the estimated fair value of financial instruments not recorded at fair value on a recurring basis into a three-level hierarchy, based on the markets in which the assets and liabilities are traded and the reliability of the assumptions used to determine fair value.

Level 1	Valuation is based upon quoted prices for identical instruments traded in active markets.
Level 2	Valuation is based upon quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-based valuation techniques for which all significant assumptions are observable in the market.
Level 3	Valuation is generated from model-based techniques that use at least one significant assumption not observable in the market. These unobservable assumptions reflect estimates of assumptions that market participants would use in pricing the asset or liability. Valuation techniques include use of option pricing models, discounted cash flow models and similar techniques.

The Corporation generally utilizes third-party pricing services to value Level 1 and Level 2 trading and investment securities, as well as certain derivatives designated as fair value hedges. Management reviews the methodologies and assumptions used by the third-party pricing services and evaluates the values provided, principally by comparison with other available market quotes for similar instruments and/or analysis based on internal models using available third-party market data. The Corporation may occasionally adjust certain values provided by the third-party pricing service when management believes, as the result of its review, that the adjusted price most appropriately reflects the fair value of the particular security.

Following are descriptions of the valuation methodologies and key inputs used to measure financial assets and liabilities recorded at fair value, as well as a description of the methods and significant assumptions used to estimate fair value disclosures for financial instruments not recorded at fair value in their entirety on a recurring basis. The descriptions include an indication of the level of the fair value hierarchy in which the assets or liabilities are classified. Transfers of assets or liabilities between levels of the fair value hierarchy are recognized at the beginning of the reporting period, when applicable.

Cash and due from banks, federal funds sold and interest-bearing deposits with banks

Due to their short-term nature, the carrying amount of these instruments approximates the estimated fair value. As such, the Corporation classifies the estimated fair value of these instruments as Level 1.

Trading securities and associated deferred compensation plan liabilities

Securities held for trading purposes and associated deferred compensation plan liabilities are recorded at fair value on a recurring basis and included in “other short-term investments” and “accrued expenses and other liabilities,” respectively, on the consolidated balance sheets. Level 1 securities held for trading purposes include assets related to employee deferred compensation plans, which are invested in mutual funds, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and other securities traded on an active exchange, such as the New York Stock Exchange. Deferred compensation plan liabilities represent the fair value of the obligation to the employee, which corresponds to the fair value of the invested assets. Level 2 trading securities include municipal bonds and residential mortgage-backed securities issued by U.S. government-sponsored entities and corporate debt securities. Securities classified as Level 3 include securities in less liquid markets and securities not rated by a credit agency. The methods used to value trading securities are the same as the methods used to value investment securities available-for-sale, discussed below.

Loans held-for-sale

Loans held-for-sale, included in “other short-term investments” on the consolidated balance sheets, are recorded at the lower of cost or fair value. Loans held-for-sale may be carried at fair value on a nonrecurring basis when fair value is less than cost. The fair value is based on what secondary markets are currently offering for portfolios with similar characteristics. As such, the Corporation classifies both loans held-for-sale subjected to nonrecurring fair value adjustments and the estimated fair value of loans held-for sale as Level 2.

Investment securities available-for-sale

Investment securities available-for-sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted prices, if available. If quoted prices are not available or the market is deemed to be inactive at the measurement date, an adjustment to the quoted prices may be necessary. In some circumstances, the Corporation may conclude that a change in valuation technique or the use of multiple valuation techniques may be appropriate to estimate an instrument's fair value. Level 1 securities include those traded on an active exchange, such as the New York Stock Exchange, U.S. Treasury securities that are traded by dealers or brokers in active over-the-counter markets and money market funds. Level 2 securities include residential mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored entities and corporate debt securities. The fair value of Level 2 securities was determined using quoted prices of securities with similar characteristics, or pricing models based on observable market data inputs, primarily interest rates, spreads and prepayment information.

Securities classified as Level 3, of which the substantial majority is auction-rate securities, represent securities in less liquid markets requiring significant management assumptions when determining fair value. Due to the lack of a robust secondary auction-rate securities market with active fair value indicators, fair value for all periods presented was determined using an income approach based on a discounted cash flow model. The discounted cash flow model utilizes two significant inputs: discount rate and workout period. The discount rate was calculated using credit spreads of the underlying collateral or similar securities plus a liquidity risk premium. The liquidity risk premium was derived from the rate at which various types of similar auction-rate securities had been redeemed or sold. The workout period was based on an assessment of publicly available information on efforts to re-establish functioning markets for these securities and the Corporation's own redemption experience. Significant increases in any of these inputs in isolation would result in a significantly lower fair value. Additionally, as the discount rate incorporates the liquidity risk premium, a change in an assumption used for the liquidity risk premium would be accompanied by a directionally similar change in the discount rate. The Corporate Development Department, with appropriate oversight and approval provided by senior management, is responsible for determining the valuation methodology for auction-rate securities and for updating significant inputs based on changes to the factors discussed above. Valuation results, including an analysis of changes to the valuation methodology and significant inputs, are provided to senior management for review on a quarterly basis.

Loans

The Corporation does not record loans at fair value on a recurring basis. However, the Corporation may establish a specific allowance for an impaired loan based on the fair value of the underlying collateral. Such loan values are reported as nonrecurring fair value measurements. Collateral values supporting individually evaluated impaired loans are evaluated quarterly. When management determines that the fair value of the collateral requires additional adjustments, either as a result of non-current appraisal value or when there is no observable market price, the Corporation classifies the impaired loan as Level 3. The Special Assets Group is responsible for performing quarterly credit quality reviews for all impaired loans as part of the quarterly allowance for loan losses process overseen by the Chief Credit Officer, during which valuation adjustments to updated collateral values are determined.

The Corporation discloses fair value estimates for loans not recorded at fair value. The estimated fair value is determined based on characteristics such as loan category, repricing features and remaining maturity, and includes prepayment and credit loss estimates. For variable rate business loans that reprice frequently, the estimated fair value is based on carrying values adjusted for estimated credit losses inherent in the portfolio at the balance sheet date. For other business loans and retail loans, fair values are estimated using a discounted cash flow model that employs a discount rate that reflects the Corporation's current pricing for loans with similar characteristics and remaining maturity, adjusted by an amount for estimated credit losses inherent in the portfolio at the balance sheet date. The rates take into account the expected yield curve, as well as an adjustment for prepayment risk, when applicable. The Corporation classifies the estimated fair value of loans held for investment as Level 3.

Customers’ liability on acceptances outstanding and acceptances outstanding

Customers' liability on acceptances outstanding is included in "accrued income and other assets" and acceptances outstanding are included in "accrued expenses and other liabilities" on the consolidated balance sheets. Due to their short-term nature, the carrying amount of these instruments approximates the estimated fair value. As such, the Corporation classifies the estimated fair value of these instruments as Level 1.

Derivative assets and derivative liabilities

Derivative instruments held or issued for risk management or customer-initiated activities are traded in over-the-counter markets where quoted market prices are not readily available. Fair value for over-the-counter derivative instruments is measured on a recurring basis using internally developed models that use primarily market observable inputs, such as yield curves and option volatilities. The Corporation manages credit risk for its over-the-counter derivative positions on a counterparty-by-counterparty basis and calculates credit valuation adjustments, included in the fair value of these instruments, on the basis of its relationships at the counterparty portfolio/master netting agreement level. These credit valuation adjustments are determined by applying a credit spread for the counterparty or the Corporation, as appropriate, to the total expected exposure of the derivative after considering collateral and other master netting arrangements. These adjustments, which are considered Level 3 inputs, are based on estimates of current credit spreads to evaluate the likelihood of default. The Corporation assessed the significance of the impact of the credit valuation adjustments on the overall valuation of its derivative positions and determined that the credit valuation adjustments were not significant to the overall valuation of its derivatives. As a result, the Corporation classifies its over-the-counter derivative valuations in Level 2 of the fair value hierarchy. Examples of Level 2 derivative instruments are interest rate swaps and energy derivative and foreign exchange contracts.

Warrants which contain a net exercise provision or a non-contingent put right embedded in the warrant agreement are accounted for as derivatives and recorded at fair value on a recurring basis using a Black-Scholes valuation model. The Black-Scholes valuation model utilizes five inputs: risk-free rate, expected life, volatility, exercise price, and the per share market value of the underlying company. The Corporation holds a portfolio of warrants for generally nonmarketable equity securities with a fair value of $2 million at September 30, 2013. These warrants are primarily from high technology, non-public companies obtained as part of the loan origination process. The Corporate Development Department is responsible for the warrant valuation process, which includes reviewing all significant inputs for reasonableness, and for providing valuation results to senior management. Increases in any of these inputs in isolation, with the exception of exercise price, would result in a higher fair value. Increases in exercise price in isolation would result in a lower fair value. The Corporation classifies warrants accounted for as derivatives as Level 3.

The Corporation also holds a derivative contract associated with the 2008 sale of its remaining ownership of Visa Inc. (Visa) Class B shares. Under the terms of the derivative contract, the Corporation will compensate the counterparty primarily for dilutive adjustments made to the conversion factor of the Visa Class B to Class A shares based on the ultimate outcome of litigation involving Visa. Conversely, the Corporation will be compensated by the counterparty for any increase in the conversion factor from anti-dilutive adjustments. At September 30, 2013, the fair value of the contract was a liability of $2 million. The recurring fair value of the derivative contract is based on unobservable inputs consisting of management's estimate of the litigation outcome, timing of litigation settlements and payments related to the derivative. Significant increases in the estimate of litigation outcome and the timing of litigation settlements in isolation would result in a significantly higher liability fair value. Significant increases in payments related to the derivative in isolation would result in a significantly lower liability fair value. The Corporation classifies the derivative liability as Level 3.

Nonmarketable equity securities

The Corporation has a portfolio of indirect (through funds) private equity and venture capital investments with a carrying value and unfunded commitments of $13 million and $6 million, respectively, at September 30, 2013. These funds generally cannot be redeemed and the majority are not readily marketable. Distributions from these funds are received by the Corporation as a result of the liquidation of underlying investments of the funds and/or as income distributions. It is estimated that the underlying assets of the funds will be liquidated over a period of up to 16 years. The investments are accounted for on the cost or equity method and are individually reviewed for impairment on a quarterly basis by comparing the carrying value to the estimated fair value. These investments may be carried at fair value on a nonrecurring basis when they are deemed to be impaired and written down to fair value. Where there is not a readily determinable fair value, the Corporation estimates fair value for indirect private equity and venture capital investments based on the Corporation's percentage ownership in the fund and the net asset value, as reported by the fund, after indication that the fund adheres to applicable fair value measurement guidance. For those funds where the net asset value is not reported by the fund, the Corporation derives the fair value of the fund by estimating the fair value of each underlying investment in the fund. In addition to using qualitative information about each underlying investment, as provided by the fund, the Corporation gives consideration to information pertinent to the specific nature of the debt or equity investment, such as relevant market conditions, offering prices, operating results, financial conditions, exit strategy and other qualitative information, as available. The lack of an independent source to validate fair value estimates, including the impact of future capital calls and transfer restrictions, is an inherent limitation in the valuation process. On a quarterly basis, the Corporate Development Department is responsible, with appropriate oversight and approval provided by senior management, for performing the valuation procedures and updating significant inputs, as are primarily provided by the underlying fund's management. The Corporation classifies fair value measurements of nonmarketable equity securities as Level 3. Commitments to fund additional investments in nonmarketable equity securities recorded at fair value on a nonrecurring basis were insignificant and $2 million at September 30, 2013 and December 31, 2012, respectively.

The Corporation also holds restricted equity investments, primarily Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) stock. Restricted equity securities are not readily marketable and are recorded at cost (par value) and evaluated for impairment based on the ultimate recoverability of the par value. No significant observable market data for these instruments is available. The Corporation considers the profitability and asset quality of the issuer, dividend payment history and recent redemption experience when determining the ultimate recoverability of the par value. The Corporation’s investment in FHLB stock totaled $48 million and $89 million at September 30, 2013 and December 31, 2012, respectively, and its investment in FRB stock totaled $85 million at both September 30, 2013 and December 31, 2012. The Corporation believes its investments in FHLB and FRB stock are ultimately recoverable at par. Therefore, the carrying amount for these restricted equity investments approximates fair value. The Corporation classifies the estimated fair value of such investments as Level 1.

Other real estate

Other real estate is included in “accrued income and other assets” on the consolidated balance sheets and includes primarily foreclosed property. Foreclosed property is initially recorded at fair value, less costs to sell, at the date of foreclosure, establishing a new cost basis. Subsequently, foreclosed property is carried at the lower of cost or fair value, less costs to sell. Other real estate may be carried at fair value on a nonrecurring basis when fair value is less than cost. Fair value is based upon independent market prices, appraised value or management's estimate of the value of the property. The Special Assets Group obtains updated independent market prices and appraised values, as required by state regulation or deemed necessary based on market conditions, and determines if additional write-downs are necessary. On a quarterly basis, senior management reviews all other real estate and determines whether the carrying values are reasonable, based on the length of time elapsed since receipt of independent market price or appraised value and current market conditions. Other real estate carried at fair value based on an observable market price or a current appraised value is classified by the Corporation as Level 2. When management determines that the fair value of other real estate requires additional adjustments, either as a result of a non-current appraisal or when there is no observable market price, the Corporation classifies the other real estate as Level 3.

Loan servicing rights

Loan servicing rights with a carrying value of $1 million at September 30, 2013, included in “accrued income and other assets” on the consolidated balance sheets and primarily related to Small Business Administration loans, are subject to impairment testing. Loan servicing rights may be carried at fair value on a nonrecurring basis when impairment testing indicates that the fair value of the loan servicing rights is less than the recorded value. A valuation model is used for impairment testing on a quarterly basis, which utilizes a discounted cash flow model, using interest rates and prepayment speed assumptions currently quoted for comparable instruments and a discount rate determined by management. On a quarterly basis, the Accounting Department is responsible for performing the valuation procedures and updating significant inputs, which are primarily obtained from available third-party market data, with appropriate oversight and approval provided by senior management. If the valuation model reflects a value less than the carrying value, loan servicing rights are adjusted to fair value through a valuation allowance as determined by the model. As such, the Corporation classifies loan servicing rights as Level 3.

Deposit liabilities

The estimated fair value of checking, savings and certain money market deposit accounts is represented by the amounts payable on demand. The estimated fair value of term deposits is calculated by discounting the scheduled cash flows using the period-end rates offered on these instruments. As such, the Corporation classifies the estimated fair value of deposit liabilities as Level 2.

Short-term borrowings

The carrying amount of federal funds purchased, securities sold under agreements to repurchase and other short-term borrowings approximates the estimated fair value. As such, the Corporation classifies the estimated fair value of short-term borrowings as Level 1.

Medium- and long-term debt

The carrying value of variable-rate FHLB advances approximates the estimated fair value. The estimated fair value of the Corporation's remaining variable- and fixed-rate medium- and long-term debt is based on quoted market values when available. If quoted market values are not available, the estimated fair value is based on the market values of debt with similar characteristics. The Corporation classifies the estimated fair value of medium- and long-term debt as Level 2.

Credit-related financial instruments

Credit-related financial instruments include unused commitments to extend credit and standby and commercial letters of credit. These instruments generate ongoing fees which are recognized over the term of the commitment. In situations where credit losses are probable, the Corporation records an allowance. The carrying value of these instruments included in "accrued expenses and other liabilities" on the consolidated balance sheets, which includes the carrying value of the deferred fees plus the related allowance, approximates the estimated fair value. The Corporation classifies the estimated fair value of credit-related financial instruments as Level 3.

ASSETS AND LIABLILITIES RECORDED AT FAIR VALUE ON A RECURRING BASIS

The following tables present the recorded amount of assets and liabilities measured at fair value on a recurring basis as of September 30, 2013 and December 31, 2012.

(in millions)	Total		Level 1		Level 2		Level 3
September 30, 2013
Trading securities:
Deferred compensation plan assets	$	92	$	92	$	—	$	—
Equity and other non-debt securities	6		6		—		—
Residential mortgage-backed securities (a)	3		—		3		—
State and municipal securities	2		—		2		—
Corporate debt securities	1		—		1		—
Total trading securities	104		98		6		—
Investment securities available-for-sale:
U.S. Treasury and other U.S. government agency securities	45		45		—		—
Residential mortgage-backed securities (a)	9,089		—		9,089		—
State and municipal securities	25		—		—		25		(b)
Corporate debt securities	57		—		56		1		(b)
Equity and other non-debt securities	272		131		—		141		(b)
Total investment securities available-for-sale	9,488		176		9,145		167
Derivative assets:
Interest rate contracts	416		—		416		—
Energy derivative contracts	128		—		128		—
Foreign exchange contracts	19		—		19		—
Warrants	2		—		—		2
Total derivative assets	565		—		563		2
Total assets at fair value	$	10,157	$	274	$	9,714	$	169
Derivative liabilities:
Interest rate contracts	$	147	$	—	$	147	$	—
Energy derivative contracts	126		—		126		—
Foreign exchange contracts	13		—		13		—
Other	2		—		—		2
Total derivative liabilities	288		—		286		2
Deferred compensation plan liabilities	92		92		—		—
Total liabilities at fair value	$	380	$	92	$	286	$	2

(a) Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

(b) Auction-rate securities.

(in millions)	Total		Level 1		Level 2		Level 3
December 31, 2012
Trading securities:
Deferred compensation plan assets	$	88	$	88	$	—	$	—
Residential mortgage-backed securities (a)	4		—		4		—
State and municipal securities	19		—		19		—
Corporate debt securities	3		—		3		—
Total trading securities	114		88		26		—
Investment securities available-for-sale:
U.S. Treasury and other U.S. government agency securities	35		35		—		—
Residential mortgage-backed securities (a)	9,920		—		9,920		—
State and municipal securities	23		—		—		23		(b)
Corporate debt securities	58		—		57		1		(b)
Equity and other non-debt securities	261		105		—		156		(b)
Total investment securities available-for-sale	10,297		140		9,977		180
Derivative assets:
Interest rate contracts	556		—		556		—
Energy derivative contracts	173		—		173		—
Foreign exchange contracts	21		—		21		—
Warrants	3		—		—		3
Total derivative assets	753		—		750		3
Total assets at fair value	$	11,164	$	228	$	10,753	$	183
Derivative liabilities:
Interest rate contracts	$	218	$	—	$	218	$	—
Energy derivative contracts	172		—		172		—
Foreign exchange contracts	18		—		18		—
Other	1		—		—		1
Total derivative liabilities	409		—		408		1
Deferred compensation plan liabilities	88		88		—		—
Total liabilities at fair value	$	497	$	88	$	408	$	1

(a) Residential mortgage-backed securities 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 the three- and nine-month periods ended September 30, 2013 and 2012.

The following table summarizes the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the three- and nine-month periods ended September 30, 2013 and 2012.

			Net Realized/Unrealized Gains (Losses) (Pretax)
	Balance  at Beginning of Period		Recorded in Earnings								Recorded in Other Comprehensive Income										Balance  at End of  Period
(in millions)			Realized				Unrealized								Sales			Settlements
Three Months Ended September 30, 2013
Investment securities available-for-sale:
State and municipal securities (a)	$	25	$	—			$	—			$	—			$	—		$	—		$	25
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	146		1			(c)	—				5			(b)	(11		)	—			141
Total investment securities available-for-sale	172		1			(c)	—				5			(b)	(11		)	—			167
Derivative assets:
Warrants	3		7			(d)	—				—				(2		)	(6		)	2
Derivative liabilities:
Other	3		—				—				—				—			(1		)	2
Three Months Ended September 30, 2012
Investment securities available-for-sale:
State and municipal securities (a)	$	24	$	—			$	—			$	(1	)	(b)	$	—		$	—		$	23
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	215		1			(c)	—				—				(12		)	—			204
Total investment securities available-for-sale	240		1			(c)	—				(1		)	(b)	(12		)	—			228
Derivative assets:
Warrants	3		—				—				—				—			—			3
Derivative liabilities:
Other	—		(1		)	(c)	—				—				—			(1		)	—
Nine Months Ended September 30, 2013
Investment securities available-for-sale:
State and municipal securities (a)	$	23	$	—			$	—			$	2		(b)	$	—		$	—		$	25
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	156		1			(c)	—				(1		)	(b)	(15		)	—			141
Total investment securities available-for-sale	180		1			(c)	—				1			(b)	(15		)	—			167
Derivative assets:
Warrants	3		8			(d)	1			(d)	—				(4		)	(6		)	2
Derivative liabilities:
Other	1		—				(2		)	(c)	—				—			(1		)	2
Nine Months Ended September 30, 2012
Investment securities available-for-sale:
State and municipal securities (a)	$	24	$	—			$	—			$	—			$	(1	)	$	—		$	23
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	408		12			(c)	—				11			(b)	(227		)	—			204
Total investment securities available-for-sale	433		12			(c)	—				11			(b)	(228		)	—			228
Derivative assets:
Warrants	3		3			(d)	1			(d)	—				(4		)	—			3
Derivative liabilities:
Other	6		(1		)	(c)	—				—				—			(7		)	—

(a) Auction-rate securities.

(b) Recorded in "net unrealized gains (losses) on investment securities available-for-sale" in other comprehensive income.

(c) Realized and unrealized gains and losses due to changes in fair value recorded in "net securities gains (losses)" on the consolidated statements of comprehensive income.

(d) Realized and unrealized gains and losses due to changes in fair value recorded in "other noninterest income" on the consolidated statements of comprehensive income.

ASSETS AND LIABILITIES RECORDED AT FAIR VALUE ON A NONRECURRING BASIS

The Corporation may be required, from time to time, to record certain assets and liabilities at fair value on a nonrecurring basis. These include assets that are recorded at the lower of cost or fair value that were recognized at fair value below cost at the end of the period. All assets recorded at fair value on a nonrecurring basis were classified as Level 3 at September 30, 2013 and December 31, 2012 and are presented in the following table. No liabilities were recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012.

(in millions)	Level 3
September 30, 2013
Loans:
Commercial	$	70
Real estate construction	23
Commercial mortgage	96
Total loans	189
Nonmarketable equity securities	1
Other real estate	12
Loan servicing rights	1
Total assets at fair value	$	203
December 31, 2012
Loans:
Commercial	$	42
Real estate construction	25
Commercial mortgage	145
Lease financing	2
Total loans	214
Nonmarketable equity securities	2
Other real estate	24
Loan servicing rights	2
Total assets at fair value	$	242

Level 3 assets recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012 included loans for which a specific allowance was established based on the fair value of collateral and other real estate for which fair value of the properties was less than the cost basis. For both asset classes, the unobservable inputs were the additional adjustments applied by management to the appraised values to reflect such factors as non-current appraisals and revisions to estimated time to sell. These adjustments are determined based on qualitative judgments made by management on a case-by-case basis and are not quantifiable inputs, although they are used in the determination of fair value.

The following table presents quantitative information related to the significant unobservable inputs utilized in the Corporation's Level 3 recurring fair value measurement as of September 30, 2013 and December 31, 2012. The Corporation's Level 3 recurring fair value measurements include auction-rate securities where fair value is determined using an income approach based on a discounted cash flow model. The inputs in the table below reflect management's expectation of continued illiquidity in the secondary auction-rate securities market due to a lack of market activity for the issuers remaining in the portfolio, a lack of market incentives for issuer redemptions, and the expectation for the low interest rate environment continuing into 2015. The September 30, 2013 discount rates reflect changes in liquidity premiums based on sustained illiquid market conditions for the securities during the third quarter 2013.

			Discounted Cash Flow Model
			Unobservable Input
	Fair Value (in millions)		Discount Rate	Workout Period (in years)
September 30, 2013
State and municipal securities (a)	$	25	5% - 11%	4 - 5
Equity and other non-debt securities (a)	141		6% - 8%	2 - 3
December 31, 2012
State and municipal securities (a)	$	23	6% - 10%	4 - 6
Equity and other non-debt securities (a)	156		4% - 6%	2 - 4

(a) Auction-rate securities.

ESTIMATED FAIR VALUES OF FINANCIAL INSTRUMENTS NOT RECORDED AT FAIR VALUE ON A RECURRING BASIS

The Corporation typically holds the majority of its financial instruments until maturity and thus does not expect to realize many of the estimated fair value amounts disclosed. The disclosures also do not include estimated fair value amounts for items that are not defined as financial instruments, but which have significant value. These include such items as core deposit intangibles, the future earnings potential of significant customer relationships and the value of trust operations and other fee generating businesses. The Corporation believes the imprecision of an estimate could be significant.

The carrying amount and estimated fair value of financial instruments not recorded at fair value in their entirety on a recurring basis on the Corporation’s consolidated balance sheets are as follows:

	Carrying Amount			Estimated Fair Value
(in millions)				Total			Level 1		Level 2		Level 3
September 30, 2013
Assets
Cash and due from banks	$	1,384		$	1,384		$	1,384	$	—	$	—
Interest-bearing deposits with banks	5,704			5,704			5,704		—		—
Loans held-for-sale	7			7			—		7		—
Total loans, net of allowance for loan losses (a)	43,547			43,541			—		—		43,541
Customers’ liability on acceptances outstanding	8			8			8		—		—
Nonmarketable equity securities (b)	13			19			—		—		19
Restricted equity investments	133			133			133		—		—
Liabilities
Demand deposits (noninterest-bearing)	23,896			23,896			—		23,896		—
Interest-bearing deposits	23,833			23,833			—		23,833		—
Customer certificates of deposit	5,180			5,175			—		5,175		—
Total deposits	52,909			52,904			—		52,904		—
Short-term borrowings	226			226			226		—		—
Acceptances outstanding	8			8			8		—		—
Medium- and long-term debt	3,565			3,548			—		3,548		—
Credit-related financial instruments	(90		)	(90		)	—		—		(90		)
December 31, 2012
Assets
Cash and due from banks	$	1,395		$	1,395		$	1,395	$	—	$	—
Federal funds sold	100			100			100		—		—
Interest-bearing deposits with banks	3,039			3,039			3,039		—		—
Loans held-for-sale	12			12			—		12		—
Total loans, net of allowance for loan losses (a)	45,428			45,649			—		—		45,649
Customers’ liability on acceptances outstanding	18			18			18		—		—
Nonmarketable equity securities (b)	13			22			—		—		22
Restricted equity investments	174			174			174		—		—
Liabilities
Demand deposits (noninterest-bearing)	23,279			23,279			—		23,279		—
Interest-bearing deposits	23,381			23,381			—		23,381		—
Customer certificates of deposit	5,531			5,535			—		5,535		—
Total deposits	52,191			52,195			—		52,195		—
Short-term borrowings	110			110			110		—		—
Acceptances outstanding	18			18			18		—		—
Medium- and long-term debt	4,720			4,685			—		4,685		—
Credit-related financial instruments	(103		)	(103		)	—		—		(103		)

(a) Included $189 million and $214 million of impaired loans recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

(b) Included $1 million and $2 million of nonmarketable equity securities recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

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Investment Securities (Summary Of Investment Securities Available-For-Sale) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Amortized Cost	$ 9,521	[1]	$ 10,060	[1]
Gross Unrealized Gains	122	[1]	248	[1]
Gross Unrealized Losses	155	[1]	11	[1]
Total investment securities available-for-sale, Fair Value	9,488	[1]	10,297	[1]
U.S. Treasury and Other U.S. Government Agency Securities
Amortized Cost	45		35
Gross Unrealized Gains	0		0
Gross Unrealized Losses	0		0
Total investment securities available-for-sale, Fair Value	45		35
Residential Mortgage-Backed Securities [Member]
Amortized Cost	9,113	[2]	9,672	[2]
Gross Unrealized Gains	121	[2]	248	[2]
Gross Unrealized Losses	145	[2]	0	[2]
Total investment securities available-for-sale, Fair Value	9,089	[2]	9,920	[2]
State And Municipal Securities [Member]
Amortized Cost	27		27
Gross Unrealized Gains	0		0
Gross Unrealized Losses	2		4
Total investment securities available-for-sale, Fair Value	25		23
Corporate Debt Securities [Member]
Amortized Cost	57		58
Gross Unrealized Gains	0		0
Gross Unrealized Losses	0		0
Total investment securities available-for-sale, Fair Value	57		58
Equity and Other Non-Debt Securities [Member]
Amortized Cost	279		268
Gross Unrealized Gains	1		0
Gross Unrealized Losses	8		7
Total investment securities available-for-sale, Fair Value	272		261
Auction-Rate Securities [Member]
Amortized Cost	176		191
Total investment securities available-for-sale, Fair Value	$ 166		$ 180

[1] Included auction-rate securities at amortized cost and fair value of $176 million and $166 million, respectively, as of September 30, 2013 and $191 million and $180 million, respectively, as of December 31, 2012.

[2] Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

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Medium- And Long-Term Debt (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Schedule Of Medium- And Long-Term Debt

Medium- and long-term debt is summarized as follows:

(in millions)	September 30, 2013		December 31, 2012
Parent company
Subordinated notes:
4.80% subordinated notes due 2015	$	321	$	330
Medium-term notes:
3.00% notes due 2015	299		299
Total parent company	620		629
Subsidiaries
Subordinated notes:
7.375% subordinated notes due 2013	—		51
5.70% subordinated notes due 2014	258		267
5.75% subordinated notes due 2016	684		694
5.20% subordinated notes due 2017	571		593
Floating-rate based on LIBOR index subordinated note due 2013	—		26
8.375% subordinated notes due 2024	184		186
7.875% subordinated notes due 2026	220		241
Total subordinated notes	1,917		2,058
Federal Home Loan Bank advances:
Floating-rate based on LIBOR indices due 2013 to 2014	1,000		2,000
Other notes:
6.0% - 6.4% fixed-rate notes due 2020	28		33
Total subsidiaries	2,945		4,091
Total medium- and long-term debt	$	3,565	$	4,720

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Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Business Segment Financial Results

Business segment financial results are as follows:

(dollar amounts in millions)	Business Bank			Retail Bank			Wealth Management			Finance			Other			Total
Nine Months Ended September 30, 2013
Earnings summary:
Net interest income (expense) (FTE)	$	1,115		$	460		$	138		$	(492	)	$	23		$	1,244
Provision for credit losses	29			21			(8		)	—			(5		)	37
Noninterest income	246			132			191			47			6			622
Noninterest expenses	446			530			238			7			28			1,249
Provision (benefit) for income taxes (FTE)	271			14			35			(168		)	4			156
Net income (loss)	$	615		$	27		$	64		$	(284	)	$	2		$	424
Net credit-related charge-offs	$	37		$	18		$	5		$	—		$	—		$	60
Selected average balances:
Assets	$	35,697		$	5,967		$	4,785		$	11,553		$	5,708		$	63,710
Loans	34,626			5,278			4,629			—			—			44,533
Deposits	25,931			21,183			3,722			309			210			51,355
Statistical data:
Return on average assets (a)	2.30		%	0.17		%	1.78		%	N/M			N/M			0.89		%
Efficiency ratio (b)	32.74			89.19			72.64			N/M			N/M			66.89

(dollar amounts in millions)	Business Bank			Retail Bank			Wealth Management			Finance			Other			Total
Nine Months Ended September 30, 2012
Earnings summary:
Net interest income (expense) (FTE)	$	1,131		$	491		$	140		$	(483	)	$	27		$	1,306
Provision for credit losses	28			16			18			—			1			63
Noninterest income	240			131			193			44			6			614
Noninterest expenses	453			543			236			8			90			1,330
Provision (benefit) for income taxes (FTE)	273			21			28			(167		)	(19		)	136
Net income (loss)	$	617		$	42		$	51		$	(280	)	$	(39	)	$	391
Net credit-related charge-offs	$	81		$	34		$	18		$	—		$	—		$	133
Selected average balances:
Assets	$	34,140		$	6,027		$	4,602		$	11,796		$	5,443		$	62,008
Loans	33,183			5,326			4,525			—			—			43,034
Deposits	24,430			20,527			3,640			171			179			48,947
Statistical data:
Return on average assets (a)	2.41		%	0.26		%	1.49		%	N/M			N/M			0.84		%
Efficiency ratio (b)	33.08			87.14			73.30			N/M			N/M			69.62

(a) Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

(b)    Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains.

FTE – Fully Taxable Equivalent

N/M – not meaningful

Market Segment Financial Results

Market segment financial results are as follows:

(dollar amounts in millions)	Michigan			California			Texas			Other Markets			Finance & Other			Total
Nine Months Ended September 30, 2013
Earnings summary:
Net interest income (expense) (FTE)	$	564		$	516		$	394		$	239		$	(469	)	$	1,244
Provision for credit losses	(19		)	25			31			5			(5		)	37
Noninterest income	268			113			100			88			53			622
Noninterest expenses	496			298			272			148			35			1,249
Provision (benefit) for income taxes (FTE)	126			114			67			13			(164		)	156
Net income (loss)	$	229		$	192		$	124		$	161		$	(282	)	$	424
Net credit-related charge-offs	$	10		$	30		$	7		$	13		$	—		$	60
Selected average balances:
Assets	$	13,936		$	14,067		$	10,774		$	7,672		$	17,261		$	63,710
Loans	13,508			13,820			10,064			7,141			—			44,533
Deposits	20,294			14,532			10,149			5,861			519			51,355
Statistical data:
Return on average assets (a)	1.44		%	1.65		%	1.46		%	2.79		%	N/M			0.89		%
Efficiency ratio (b)	59.52			47.38			54.96			45.30			N/M			66.89

(dollar amounts in millions)	Michigan			California			Texas			Other Markets			Finance & Other			Total
Nine Months Ended September 30, 2012
Earnings summary:
Net interest income (expense) (FTE)	$	585		$	514		$	429		$	234		$	(456	)	$	1,306
Provision for credit losses	(7		)	9			43			17			1			63
Noninterest income	289			101			93			81			50			614
Noninterest expenses	527			294			271			140			98			1,330
Provision (benefit) for income taxes (FTE)	123			115			73			11			(186		)	136
Net income (loss)	$	231		$	197		$	135		$	147		$	(319	)	$	391
Net credit-related charge-offs	$	40		$	34		$	17		$	42		$	—		$	133
Selected average balances:
Assets	$	13,968		$	12,786		$	10,224		$	7,791		$	17,239		$	62,008
Loans	13,687			12,555			9,462			7,330			—			43,034
Deposits	19,423			14,270			10,118			4,786			350			48,947
Statistical data:
Return on average assets (a)	1.51		%	1.72		%	1.58		%	2.51		%	N/M			0.84		%
Efficiency ratio (b)	60.29			47.86			51.78			46.05			N/M			69.62

(a) Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

(b)    Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains.

FTE – Fully Taxable Equivalent

N/M – not meaningful

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Income Taxes And Tax-Related Items Income Taxes And Tax-Related Items (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 13	$ 42
Decrease in unrecognized tax benefits	29
Reasonably possible change in unrecognized tax benefits in next 12 months	0
Tax-related interest and penalties payable	2	4
Decrease in tax-related interest and penalties payable	2
Net deferred tax assets	329	254
Increase in net deferred tax assets	$ 75

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Fair Value Measurements (Assets And Liabilities Recorded At Fair Value On A Nonrecurring Basis) (Details) (Nonrecurring [Member], Level 3, USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	$ 189	$ 214
Nonmarketable equity securities	1	2
Other real estate	12	24
Loan servicing rights	1	2
Total assets at fair value	203	242
Commercial
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	70	42
Real estate construction
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	23	25
Commercial mortgage
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans	96	145
Lease financing
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans		$ 2

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Employee Benefit Plans Employee Benefit Plans (Net Periodic Defined Benefit Cost) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Net periodic defined benefit cost			$ 65	$ 60
Defined Benefit Pension Plans | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	9	9	28	25
Interest cost	20	19	59	59
Expected return on plan assets	(33)	(29)	(99)	(85)
Amortization of prior service cost (credit)	1	1	3	3
Amortization of net loss	18	14	56	40
Net periodic defined benefit cost	15	14	47	42
Defined Benefit Pension Plans | Non-Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	3	3
Interest cost	2	2	7	7
Amortization of prior service cost (credit)	0	0	(1)	(1)
Amortization of net loss	3	1	8	5
Net periodic defined benefit cost	6	4	17	14
Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1	3	3
Expected return on plan assets	(1)	(1)	(3)	(3)
Amortization of transition obligations	0	1	0	3
Amortization of net loss	0	0	1	1
Net periodic defined benefit cost	$ 0	$ 1	$ 1	$ 4

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Credit Quality And Allowance For Credit Losses (Acquired Purchased Credit-Impaired Loans) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Credit Quality And Allowance For Credit Losses [Abstract]
Carrying amount PCI loans	$ 15	$ 36
Outstanding balance	$ 99	$ 138

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Credit Quality And Allowance For Credit Losses (Changes In The Allowance For Credit Losses On Lending-Related Commitments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for credit losses	$ 8	$ 22	$ 37	$ 63
Loan Origination Commitments [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period	36	36	32	26
Provision for credit losses	(2)	(1)	2	9
Balance at end of period	$ 34	$ 35	$ 34	$ 35

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Credit Quality And Allowance For Credit Losses (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Credit Quality And Allowance For Credit Losses [Abstract]
Commitments to lend additional funds to TDR borrowers	$ 3	$ 5
Allowance for PCI loans	$ 0	$ 0

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Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Common stock, par value	$ 5	$ 5
Common stock, authorized shares	325,000,000	325,000,000
Common stock, issued shares	228,164,824	228,164,824
Shares in treasury	44,483,659	39,889,610

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Medium- And Long-Term Debt

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Medium- And Long-Term Debt

MEDIUM- AND LONG-TERM DEBT

Medium- and long-term debt is summarized as follows:

(in millions)	September 30, 2013		December 31, 2012
Parent company
Subordinated notes:
4.80% subordinated notes due 2015	$	321	$	330
Medium-term notes:
3.00% notes due 2015	299		299
Total parent company	620		629
Subsidiaries
Subordinated notes:
7.375% subordinated notes due 2013	—		51
5.70% subordinated notes due 2014	258		267
5.75% subordinated notes due 2016	684		694
5.20% subordinated notes due 2017	571		593
Floating-rate based on LIBOR index subordinated note due 2013	—		26
8.375% subordinated notes due 2024	184		186
7.875% subordinated notes due 2026	220		241
Total subordinated notes	1,917		2,058
Federal Home Loan Bank advances:
Floating-rate based on LIBOR indices due 2013 to 2014	1,000		2,000
Other notes:
6.0% - 6.4% fixed-rate notes due 2020	28		33
Total subsidiaries	2,945		4,091
Total medium- and long-term debt	$	3,565	$	4,720

The carrying value of medium- and long-term debt has been adjusted to reflect the gain or loss attributable to the risk hedged with interest rate swaps.

Subordinated notes with remaining maturities greater than one year qualify as Tier 2 capital.

Comerica Bank (the Bank) is a member of the FHLB, which provides short- and long-term funding collateralized by mortgage-related assets to its members. FHLB advances bear interest at variable rates based on LIBOR and were secured by a blanket lien on $13 billion of real estate-related loans at September 30, 2013.

In the third quarter 2013, the Bank exercised its option to redeem, at par, a $25 million floating-rate subordinated note which had an original maturity date of 2018, and recognized a pretax gain of $1 million, included in "other noninterest expenses" in the consolidated statements of income.

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Consolidated Statements Of Changes In Shareholders' Equity (USD $) In Millions	Total	Common Stock	Capital Surplus	Accumulated Other Comprehensive Loss	Retained Earnings	Treasury Stock
BALANCE at Dec. 31, 2011	$ 6,868	$ 1,141	$ 2,170	$ (356)	$ 5,546	$ (1,633)
BALANCE (in shares) at Dec. 31, 2011		197.3
Net income	391				391
Other comprehensive income (loss), net of tax	103			103
Cash dividends declared on common stock	(78)				(78)
Purchase of common stock	(215)					(215)
Purchase of common stock (in shares)		7.1
Net issuance of common stock under employee stock plans	(14)		(48)		(28)	62
Net issuance of common stock under employee stock plans (in shares)		1.2
Share-based compensation	29		29
Other	0		(2)			2
Other (in shares)		0
BALANCE at Sep. 30, 2012	7,084	1,141	2,153	(253)	5,831	(1,788)
BALANCE (in shares) at Sep. 30, 2012		191.4
BALANCE at Dec. 31, 2012	6,942	1,141	2,162	(413)	5,931	(1,879)
BALANCE (in shares) at Dec. 31, 2012		188.3
Net income	424				424
Other comprehensive income (loss), net of tax	(128)			(128)
Cash dividends declared on common stock	(95)				(95)
Purchase of common stock	(218)					(218)
Purchase of common stock (in shares)		5.8
Net issuance of common stock under employee stock plans	17		(18)		(21)	56
Net issuance of common stock under employee stock plans (in shares)		1.2
Share-based compensation	27		27
BALANCE at Sep. 30, 2013	$ 6,969	$ 1,141	$ 2,171	$ (541)	$ 6,239	$ (2,041)
BALANCE (in shares) at Sep. 30, 2013		183.7

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Derivative And Credit-Related Financial Instruments (Schedule Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	$ 21,447	[1]	$ 21,781	[1]
Fair Value of Gross Derivative Assets	563		750
Fair Value of Gross Derivative Liabilities	286		408
Derivative Asset, Netting Adjustment - Offsetting Liabilities	(227)		(279)
Derivative Liability, Netting Adjustment - Offsetting Assets	(227)		(279)
Derivative Asset, Netting Adjustment - Cash Collateral Received	(1)		(11)
Derivative Liability, Netting Adjustment, Cash Collateral Posted	(8)		0
Fair Value of Net Derivative Assets	335	[2]	460	[2]
Fair Value of Net Derivative Liabilities	51	[2]	129	[2]
Derivative Asset, Securities Pledged As Collateral	(141)		(180)
Derivative Liability, Securities Pledged As Collateral	(12)		(56)
Net Derivative Assets After Deducting Amounts not Offset	194		280
Net Derivative Liabilities After Deducting Amounts not Offset	39		73
Derivative Credit Risk Valuation Adjustment, Derivative Assets	2		4
Risk Management Purposes [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	1,766	[1]	1,925	[1]
Fair Value of Gross Derivative Assets	224		291
Fair Value of Gross Derivative Liabilities	0		0
Risk Management Purposes [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	1,450	[1]	1,450	[1]
Fair Value of Gross Derivative Assets	221		290
Fair Value of Gross Derivative Liabilities	0		0
Risk Management Purposes [Member] | Derivatives Used As Economic Hedges [Member] | Foreign Exchange Spot Forward And Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	316	[1]	475	[1]
Fair Value of Gross Derivative Assets	3		1
Fair Value of Gross Derivative Liabilities	0		0
Customer-Initiated And Other Activities [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	19,681	[1]	19,856	[1]
Fair Value of Gross Derivative Assets	339		459
Fair Value of Gross Derivative Liabilities	286		408
Customer-Initiated And Other Activities [Member] | Interest Rate Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	12,160	[1]	12,042	[1]
Fair Value of Gross Derivative Assets	195		266
Fair Value of Gross Derivative Liabilities	147		218
Customer-Initiated And Other Activities [Member] | Interest Rate Caps And Floors Written [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	544	[1]	545	[1]
Fair Value of Gross Derivative Assets	0		0
Fair Value of Gross Derivative Liabilities	3		3
Customer-Initiated And Other Activities [Member] | Interest Rate Caps and Floors Purchased [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	544	[1]	545	[1]
Fair Value of Gross Derivative Assets	3		3
Fair Value of Gross Derivative Liabilities	0		0
Customer-Initiated And Other Activities [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	11,072	[1]	10,952	[1]
Fair Value of Gross Derivative Assets	192		263
Fair Value of Gross Derivative Liabilities	144		215
Customer-Initiated And Other Activities [Member] | Energy Contracts [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	5,723	[1]	5,561	[1]
Fair Value of Gross Derivative Assets	128		173
Fair Value of Gross Derivative Liabilities	126		172
Customer-Initiated And Other Activities [Member] | Energy Caps and Floors Written [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	1,642	[1]	1,873	[1]
Fair Value of Gross Derivative Assets	1		0
Fair Value of Gross Derivative Liabilities	75		112
Customer-Initiated And Other Activities [Member] | Energy Caps and Floors Purchased [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	1,642	[1]	1,873	[1]
Fair Value of Gross Derivative Assets	75		112
Fair Value of Gross Derivative Liabilities	1		0
Customer-Initiated And Other Activities [Member] | Energy Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	2,439	[1]	1,815	[1]
Fair Value of Gross Derivative Assets	52		61
Fair Value of Gross Derivative Liabilities	50		60
Customer-Initiated And Other Activities [Member] | Foreign Exchange Spot, Forwards, Options and Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional/Contract Amount	1,798	[1]	2,253	[1]
Fair Value of Gross Derivative Assets	16		20
Fair Value of Gross Derivative Liabilities	$ 13		$ 18

[1] 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.

[2] 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 totaled $2 million and $4 million at September 30, 2013 and December 31, 2012, respectively.

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Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
ASSETS
Cash and due from banks	$ 1,384		$ 1,395
Federal funds sold	0		100
Interest-bearing deposits with banks	5,704		3,039
Other short-term investments	106		125
Investment securities available-for-sale	9,488	[1]	10,297	[1]
Commercial loans	27,897		29,513
Real estate construction loans	1,552		1,240
Commercial mortgage loans	8,785		9,472
Lease financing	829		859
International loans	1,286		1,293
Residential mortgage loans	1,650		1,527
Consumer loans	2,152		2,153
Total loans	44,151		46,057
Less allowance for loan losses	(604)		(629)
Net loans	43,547		45,428
Premises and equipment	604		622
Accrued income and other assets	3,837		4,063
Total assets	64,670		65,069
LIABILITIES AND SHAREHOLDERS' EQUITY
Noninterest-bearing deposits	23,896		23,279
Money market and interest-bearing checking deposits	21,697		21,273
Savings deposits	1,645		1,606
Customer certificates of deposit	5,180		5,531
Foreign office time deposits	491		502
Total interest-bearing deposits	29,013		28,912
Total deposits	52,909		52,191
Short-term borrowings	226		110
Accrued expenses and other liabilities	1,001		1,106
Medium- and long-term debt	3,565		4,720
Total liabilities	57,701		58,127
Common stock - $5 par value: Authorized - 325,000,000 shares; Issued - 228,164,824 shares	1,141		1,141
Capital surplus	2,171		2,162
Accumulated other comprehensive loss	(541)		(413)
Retained earnings	6,239		5,931
Less cost of common stock in treasury - 44,483,659 shares at 9/30/13 and 39,889,610 shares at 12/31/12	(2,041)		(1,879)
Total shareholders' equity	6,969		6,942
Total liabilities and shareholders' equity	$ 64,670		$ 65,069

[1] Included auction-rate securities at amortized cost and fair value of $176 million and $166 million, respectively, as of September 30, 2013 and $191 million and $180 million, respectively, as of December 31, 2012.

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Credit Quality And Allowance For Credit Losses (Individually Evaluated Impaired Loans) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	$ 64		$ 53
Recorded investment in impaired loans with related allowance	282		366
Recorded investment total impaired loans	346		419
Unpaid principal balance	528		638
Related allowance for loan losses	67		76
Business loans
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	12		2
Recorded investment in impaired loans with related allowance	282		366
Recorded investment total impaired loans	294		368
Unpaid principal balance	456		570
Related allowance for loan losses	67		76
Business loans | Commercial
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	10		2
Recorded investment in impaired loans with related allowance	85		117
Recorded investment total impaired loans	95		119
Unpaid principal balance	173		207
Related allowance for loan losses	28		26
Business loans | Real estate construction
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0		0
Recorded investment in impaired loans with related allowance	23		26
Recorded investment total impaired loans	23		26
Unpaid principal balance	29		32
Related allowance for loan losses	4		4
Business loans | Real estate construction | Commercial Real Estate business line
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0	[1]	0	[1]
Recorded investment in impaired loans with related allowance	23	[1]	26	[1]
Recorded investment total impaired loans	23	[1]	26	[1]
Unpaid principal balance	28	[1]	31	[1]
Related allowance for loan losses	4	[1]	4	[1]
Business loans | Real estate construction | Other business lines
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0	[2]	0	[2]
Recorded investment in impaired loans with related allowance	0	[2]	0	[2]
Recorded investment total impaired loans	0	[2]	0	[2]
Unpaid principal balance	1	[2]	1	[2]
Related allowance for loan losses	0	[2]	0	[2]
Business loans | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	2		0
Recorded investment in impaired loans with related allowance	174		221
Recorded investment total impaired loans	176		221
Unpaid principal balance	254		326
Related allowance for loan losses	35		46
Business loans | Commercial mortgage | Commercial Real Estate business line
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0	[1]	0	[1]
Recorded investment in impaired loans with related allowance	74	[1]	99	[1]
Recorded investment total impaired loans	74	[1]	99	[1]
Unpaid principal balance	117	[1]	159	[1]
Related allowance for loan losses	12	[1]	18	[1]
Business loans | Commercial mortgage | Other business lines
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	2	[2]	0	[2]
Recorded investment in impaired loans with related allowance	100	[2]	122	[2]
Recorded investment total impaired loans	102	[2]	122	[2]
Unpaid principal balance	137	[2]	167	[2]
Related allowance for loan losses	23	[2]	28	[2]
Business loans | Lease financing
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance			0
Recorded investment in impaired loans with related allowance			2
Recorded investment total impaired loans			2
Unpaid principal balance			5
Related allowance for loan losses			0
Retail loans
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	52	[3]	51	[3]
Recorded investment in impaired loans with related allowance	0	[3]	0	[3]
Recorded investment total impaired loans	52	[3]	51	[3]
Unpaid principal balance	72	[3]	68	[3]
Related allowance for loan losses	0	[3]	0	[3]
Retail loans | Residential mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	38		39
Recorded investment in impaired loans with related allowance	0		0
Recorded investment total impaired loans	38		39
Unpaid principal balance	45		48
Related allowance for loan losses	0		0
Retail loans | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	14		12
Recorded investment in impaired loans with related allowance	0		0
Recorded investment total impaired loans	14		12
Unpaid principal balance	27		20
Related allowance for loan losses	0		0
Retail loans | Consumer | Home equity
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	10		8
Recorded investment in impaired loans with related allowance	0		0
Recorded investment total impaired loans	10		8
Unpaid principal balance	16		10
Related allowance for loan losses	0		0
Retail loans | Consumer | Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	4		4
Recorded investment in impaired loans with related allowance	0		0
Recorded investment total impaired loans	4		4
Unpaid principal balance	11		10
Related allowance for loan losses	$ 0		$ 0

[1] Primarily loans to real estate developers.

[2] Primarily loans secured by owner-occupied real estate.

[3] Individually evaluated retail loans had no related allowance for loan losses, primarily due to policy changes which resulted in direct write-downs of restructured retail loans.

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Business Segment Information (Market Segment Financial Results) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Net interest income (expense) (FTE)			$ 1,244		$ 1,306
Provision for credit losses	8	22	37		63
Noninterest income	214	197	622		614
Noninterest expenses	417	449	1,249		1,330
Provision (benefit) for income taxes (FTE)			156		136
Net income (loss)	147	117	424		391
Net credit-related charge-offs			60		133
Assets, average	63,710	62,008	63,710		62,008
Loans, average			44,533		43,034
Deposits, average			51,355		48,947
Return on average assets			0.89%	[1]	0.84%	[1]
Efficiency ratio			66.89%	[2]	69.62%	[2]
Michigan
Net interest income (expense) (FTE)			564		585
Provision for credit losses			(19)		(7)
Noninterest income			268		289
Noninterest expenses			496		527
Provision (benefit) for income taxes (FTE)			126		123
Net income (loss)			229		231
Net credit-related charge-offs			10		40
Assets, average	13,936	13,968	13,936		13,968
Loans, average			13,508		13,687
Deposits, average			20,294		19,423
Return on average assets			1.44%	[1]	1.51%	[1]
Efficiency ratio			59.52%	[2]	60.29%	[2]
California
Net interest income (expense) (FTE)			516		514
Provision for credit losses			25		9
Noninterest income			113		101
Noninterest expenses			298		294
Provision (benefit) for income taxes (FTE)			114		115
Net income (loss)			192		197
Net credit-related charge-offs			30		34
Assets, average	14,067	12,786	14,067		12,786
Loans, average			13,820		12,555
Deposits, average			14,532		14,270
Return on average assets			1.65%	[1]	1.72%	[1]
Efficiency ratio			47.38%	[2]	47.86%	[2]
Texas
Net interest income (expense) (FTE)			394		429
Provision for credit losses			31		43
Noninterest income			100		93
Noninterest expenses			272		271
Provision (benefit) for income taxes (FTE)			67		73
Net income (loss)			124		135
Net credit-related charge-offs			7		17
Assets, average	10,774	10,224	10,774		10,224
Loans, average			10,064		9,462
Deposits, average			10,149		10,118
Return on average assets			1.46%	[1]	1.58%	[1]
Efficiency ratio			54.96%	[2]	51.78%	[2]
Other Markets
Net interest income (expense) (FTE)			239		234
Provision for credit losses			5		17
Noninterest income			88		81
Noninterest expenses			148		140
Provision (benefit) for income taxes (FTE)			13		11
Net income (loss)			161		147
Net credit-related charge-offs			13		42
Assets, average	7,672	7,791	7,672		7,791
Loans, average			7,141		7,330
Deposits, average			5,861		4,786
Return on average assets			2.79%	[1]	2.51%	[1]
Efficiency ratio			45.30%	[2]	46.05%	[2]
Finance & Other
Net interest income (expense) (FTE)			(469)		(456)
Provision for credit losses			(5)		1
Noninterest income			53		50
Noninterest expenses			35		98
Provision (benefit) for income taxes (FTE)			(164)		(186)
Net income (loss)			(282)		(319)
Net credit-related charge-offs			0		0
Assets, average	17,261	17,239	17,261		17,239
Loans, average			0		0
Deposits, average			$ 519		$ 350

[1] Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

[2] Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains.

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Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Sep. 30, 2013

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule Of Accumulated Other Comprehensive Income (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 nine months ended September 30, 2013 and 2012, including the amount of income tax expense (benefit) allocated to each component of other comprehensive income (loss).

	Nine Months Ended September 30,
(in millions)	2013			2012
Accumulated net unrealized (losses) gains on investment securities available-for-sale:
Balance at beginning of period, net of tax	$	150		$	129
Net unrealized holding (losses) gains arising during the period	(270		)	123
Less: Provision (benefit) for income taxes	(100		)	44
Net unrealized holding (losses) gains arising during the period, net of tax	(170		)	79
Less:
Net realized gains included in net securities gains (losses)	1			12
Less: Provision for income taxes	—			4
Reclassification adjustment for net securities gains included in net income, net of tax	1			8
Change in net unrealized (losses) gains on investment securities available-for-sale, net of tax	(171		)	71
Balance at end of period, net of tax	$	(21	)	$	200
Accumulated defined benefit pension and other postretirement plans adjustment:
Balance at beginning of period, net of tax	$	(563	)	$	(485	)
Net defined benefit pension and other postretirement adjustment arising during the period, net of tax	—			—
Less:
Amortization of actuarial net loss	(65		)	(46		)
Amortization of prior service cost	(2		)	(2		)
Amortization of transition obligation	—			(3		)
Amounts recognized in employee benefits expense	(67		)	(51		)
Less: Benefit for income taxes	(24		)	(19		)
Adjustment for amounts recognized as components of net periodic benefit cost during the period, net of tax	(43		)	(32		)
Change in defined benefit pension and other postretirement plans adjustment, net of tax	43			32
Balance at end of period, net of tax	$	(520	)	$	(453	)
Total accumulated other comprehensive loss at end of period, net of tax	$	(541	)	$	(253	)

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Assets 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 September 30, 2013 and December 31, 2012.

(in millions)	Total		Level 1		Level 2		Level 3
September 30, 2013
Trading securities:
Deferred compensation plan assets	$	92	$	92	$	—	$	—
Equity and other non-debt securities	6		6		—		—
Residential mortgage-backed securities (a)	3		—		3		—
State and municipal securities	2		—		2		—
Corporate debt securities	1		—		1		—
Total trading securities	104		98		6		—
Investment securities available-for-sale:
U.S. Treasury and other U.S. government agency securities	45		45		—		—
Residential mortgage-backed securities (a)	9,089		—		9,089		—
State and municipal securities	25		—		—		25		(b)
Corporate debt securities	57		—		56		1		(b)
Equity and other non-debt securities	272		131		—		141		(b)
Total investment securities available-for-sale	9,488		176		9,145		167
Derivative assets:
Interest rate contracts	416		—		416		—
Energy derivative contracts	128		—		128		—
Foreign exchange contracts	19		—		19		—
Warrants	2		—		—		2
Total derivative assets	565		—		563		2
Total assets at fair value	$	10,157	$	274	$	9,714	$	169
Derivative liabilities:
Interest rate contracts	$	147	$	—	$	147	$	—
Energy derivative contracts	126		—		126		—
Foreign exchange contracts	13		—		13		—
Other	2		—		—		2
Total derivative liabilities	288		—		286		2
Deferred compensation plan liabilities	92		92		—		—
Total liabilities at fair value	$	380	$	92	$	286	$	2

(a) Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

(b) Auction-rate securities.

(in millions)	Total		Level 1		Level 2		Level 3
December 31, 2012
Trading securities:
Deferred compensation plan assets	$	88	$	88	$	—	$	—
Residential mortgage-backed securities (a)	4		—		4		—
State and municipal securities	19		—		19		—
Corporate debt securities	3		—		3		—
Total trading securities	114		88		26		—
Investment securities available-for-sale:
U.S. Treasury and other U.S. government agency securities	35		35		—		—
Residential mortgage-backed securities (a)	9,920		—		9,920		—
State and municipal securities	23		—		—		23		(b)
Corporate debt securities	58		—		57		1		(b)
Equity and other non-debt securities	261		105		—		156		(b)
Total investment securities available-for-sale	10,297		140		9,977		180
Derivative assets:
Interest rate contracts	556		—		556		—
Energy derivative contracts	173		—		173		—
Foreign exchange contracts	21		—		21		—
Warrants	3		—		—		3
Total derivative assets	753		—		750		3
Total assets at fair value	$	11,164	$	228	$	10,753	$	183
Derivative liabilities:
Interest rate contracts	$	218	$	—	$	218	$	—
Energy derivative contracts	172		—		172		—
Foreign exchange contracts	18		—		18		—
Other	1		—		—		1
Total derivative liabilities	409		—		408		1
Deferred compensation plan liabilities	88		88		—		—
Total liabilities at fair value	$	497	$	88	$	408	$	1

(a) Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

(b) Auction-rate securities.

Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis

The following table summarizes the changes in Level 3 assets and liabilities measured at fair value on a recurring basis for the three- and nine-month periods ended September 30, 2013 and 2012.

			Net Realized/Unrealized Gains (Losses) (Pretax)
	Balance  at Beginning of Period		Recorded in Earnings								Recorded in Other Comprehensive Income										Balance  at End of  Period
(in millions)			Realized				Unrealized								Sales			Settlements
Three Months Ended September 30, 2013
Investment securities available-for-sale:
State and municipal securities (a)	$	25	$	—			$	—			$	—			$	—		$	—		$	25
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	146		1			(c)	—				5			(b)	(11		)	—			141
Total investment securities available-for-sale	172		1			(c)	—				5			(b)	(11		)	—			167
Derivative assets:
Warrants	3		7			(d)	—				—				(2		)	(6		)	2
Derivative liabilities:
Other	3		—				—				—				—			(1		)	2
Three Months Ended September 30, 2012
Investment securities available-for-sale:
State and municipal securities (a)	$	24	$	—			$	—			$	(1	)	(b)	$	—		$	—		$	23
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	215		1			(c)	—				—				(12		)	—			204
Total investment securities available-for-sale	240		1			(c)	—				(1		)	(b)	(12		)	—			228
Derivative assets:
Warrants	3		—				—				—				—			—			3
Derivative liabilities:
Other	—		(1		)	(c)	—				—				—			(1		)	—
Nine Months Ended September 30, 2013
Investment securities available-for-sale:
State and municipal securities (a)	$	23	$	—			$	—			$	2		(b)	$	—		$	—		$	25
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	156		1			(c)	—				(1		)	(b)	(15		)	—			141
Total investment securities available-for-sale	180		1			(c)	—				1			(b)	(15		)	—			167
Derivative assets:
Warrants	3		8			(d)	1			(d)	—				(4		)	(6		)	2
Derivative liabilities:
Other	1		—				(2		)	(c)	—				—			(1		)	2
Nine Months Ended September 30, 2012
Investment securities available-for-sale:
State and municipal securities (a)	$	24	$	—			$	—			$	—			$	(1	)	$	—		$	23
Corporate debt securities (a)	1		—				—				—				—			—			1
Equity and other non-debt securities (a)	408		12			(c)	—				11			(b)	(227		)	—			204
Total investment securities available-for-sale	433		12			(c)	—				11			(b)	(228		)	—			228
Derivative assets:
Warrants	3		3			(d)	1			(d)	—				(4		)	—			3
Derivative liabilities:
Other	6		(1		)	(c)	—				—				—			(7		)	—

(a) Auction-rate securities.

(b) Recorded in "net unrealized gains (losses) on investment securities available-for-sale" in other comprehensive income.

(c) Realized and unrealized gains and losses due to changes in fair value recorded in "net securities gains (losses)" on the consolidated statements of comprehensive income.

(d) Realized and unrealized gains and losses due to changes in fair value recorded in "other noninterest income" on the consolidated statements of comprehensive income.

Assets And Liabilities Recorded At Fair Value On A Nonrecurring Basis

All assets recorded at fair value on a nonrecurring basis were classified as Level 3 at September 30, 2013 and December 31, 2012 and are presented in the following table. No liabilities were recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012.

(in millions)	Level 3
September 30, 2013
Loans:
Commercial	$	70
Real estate construction	23
Commercial mortgage	96
Total loans	189
Nonmarketable equity securities	1
Other real estate	12
Loan servicing rights	1
Total assets at fair value	$	203
December 31, 2012
Loans:
Commercial	$	42
Real estate construction	25
Commercial mortgage	145
Lease financing	2
Total loans	214
Nonmarketable equity securities	2
Other real estate	24
Loan servicing rights	2
Total assets at fair value	$	242

Quantitative Information About Level 3 Measurements

The following table presents quantitative information related to the significant unobservable inputs utilized in the Corporation's Level 3 recurring fair value measurement as of September 30, 2013 and December 31, 2012. The Corporation's Level 3 recurring fair value measurements include auction-rate securities where fair value is determined using an income approach based on a discounted cash flow model. The inputs in the table below reflect management's expectation of continued illiquidity in the secondary auction-rate securities market due to a lack of market activity for the issuers remaining in the portfolio, a lack of market incentives for issuer redemptions, and the expectation for the low interest rate environment continuing into 2015. The September 30, 2013 discount rates reflect changes in liquidity premiums based on sustained illiquid market conditions for the securities during the third quarter 2013.

			Discounted Cash Flow Model
			Unobservable Input
	Fair Value (in millions)		Discount Rate	Workout Period (in years)
September 30, 2013
State and municipal securities (a)	$	25	5% - 11%	4 - 5
Equity and other non-debt securities (a)	141		6% - 8%	2 - 3
December 31, 2012
State and municipal securities (a)	$	23	6% - 10%	4 - 6
Equity and other non-debt securities (a)	156		4% - 6%	2 - 4

(a) Auction-rate securities.

Estimated Fair Values Of Financial Instruments Not Recorded At Fair Value In Their Entirety On A Recurring Basis

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
(in millions)				Total			Level 1		Level 2		Level 3
September 30, 2013
Assets
Cash and due from banks	$	1,384		$	1,384		$	1,384	$	—	$	—
Interest-bearing deposits with banks	5,704			5,704			5,704		—		—
Loans held-for-sale	7			7			—		7		—
Total loans, net of allowance for loan losses (a)	43,547			43,541			—		—		43,541
Customers’ liability on acceptances outstanding	8			8			8		—		—
Nonmarketable equity securities (b)	13			19			—		—		19
Restricted equity investments	133			133			133		—		—
Liabilities
Demand deposits (noninterest-bearing)	23,896			23,896			—		23,896		—
Interest-bearing deposits	23,833			23,833			—		23,833		—
Customer certificates of deposit	5,180			5,175			—		5,175		—
Total deposits	52,909			52,904			—		52,904		—
Short-term borrowings	226			226			226		—		—
Acceptances outstanding	8			8			8		—		—
Medium- and long-term debt	3,565			3,548			—		3,548		—
Credit-related financial instruments	(90		)	(90		)	—		—		(90		)
December 31, 2012
Assets
Cash and due from banks	$	1,395		$	1,395		$	1,395	$	—	$	—
Federal funds sold	100			100			100		—		—
Interest-bearing deposits with banks	3,039			3,039			3,039		—		—
Loans held-for-sale	12			12			—		12		—
Total loans, net of allowance for loan losses (a)	45,428			45,649			—		—		45,649
Customers’ liability on acceptances outstanding	18			18			18		—		—
Nonmarketable equity securities (b)	13			22			—		—		22
Restricted equity investments	174			174			174		—		—
Liabilities
Demand deposits (noninterest-bearing)	23,279			23,279			—		23,279		—
Interest-bearing deposits	23,381			23,381			—		23,381		—
Customer certificates of deposit	5,531			5,535			—		5,535		—
Total deposits	52,191			52,195			—		52,195		—
Short-term borrowings	110			110			110		—		—
Acceptances outstanding	18			18			18		—		—
Medium- and long-term debt	4,720			4,685			—		4,685		—
Credit-related financial instruments	(103		)	(103		)	—		—		(103		)

(a) Included $189 million and $214 million of impaired loans recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

(b) Included $1 million and $2 million of nonmarketable equity securities recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

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Investment Securities (Contractual Maturity Distribution Of Debt Securities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Within one year, Amortized Cost	$ 78
After one year through five years, Amortized Cost	263
After five years through ten years, Amortized Cost	97
After ten years, Amortized Cost	8,804
Subtotal, Amortized Cost	9,242
Within one year, Fair Value	78
After one year through five years, Fair Value	268
After five years through ten years, Fair Value	96
After ten years, Fair Value	8,774
Subtotal, Fair Value	9,216
Total investment securities available-for-sale, Amortized Cost	9,521	[1]	10,060	[1]
Total investment securities available-for-sale, Fair Value	9,488	[1]	10,297	[1]
Equity and Other Non-Debt Securities [Member]
Total investment securities available-for-sale, Amortized Cost	279		268
Total investment securities available-for-sale, Fair Value	$ 272		$ 261

[1] Included auction-rate securities at amortized cost and fair value of $176 million and $166 million, respectively, as of September 30, 2013 and $191 million and $180 million, respectively, as of December 31, 2012.

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Credit Quality And Allowance For Credit Losses Credit Quality And Allowance For Credit Losses (Troubled Debt Restructuring Subsequent Default) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	$ 81		$ 97		$ 81		$ 97
Subsequent Default During Period	4		24		42		54
Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	4		22		4		22
Subsequent Default During Period	0		1		0		13
AB Note Restructures
Financing Receivable, Modifications [Line Items]
Balance	19		29		19		29
Subsequent Default During Period	0		0		0		0
Business loans | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	68		89		68		89
Subsequent Default During Period	4		21		42		51
Business loans | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	0		18		0		18
Subsequent Default During Period	0		1		0		13
Business loans | Commercial | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	13		31		13		31
Subsequent Default During Period	2		5		11		12
Business loans | Commercial | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	0		1		0		1
Subsequent Default During Period	0		1		0		1
Business loans | Real estate construction | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	1		1		1		1
Subsequent Default During Period	0		0		0		1
Business loans | Real estate construction | Commercial Real Estate business line | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	1	[1]	1	[1]	1	[1]	1	[1]
Subsequent Default During Period	0	[1]	0	[1]	0	[1]	1	[1]
Business loans | Commercial mortgage | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	54		57		54		57
Subsequent Default During Period	2		16		31		38
Business loans | Commercial mortgage | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	0		14		0		14
Subsequent Default During Period	0		0		0		12
Business loans | Commercial mortgage | Commercial Real Estate business line | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	34	[1]	30	[1]	34	[1]	30	[1]
Subsequent Default During Period	0	[1]	14	[1]	20	[1]	29	[1]
Business loans | Commercial mortgage | Other business lines | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	20	[2]	27	[2]	20	[2]	27	[2]
Subsequent Default During Period	2	[2]	2	[2]	11	[2]	9	[2]
Business loans | Commercial mortgage | Other business lines | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	0	[2]	14	[2]	0	[2]	14	[2]
Subsequent Default During Period	0	[2]	0	[2]	0	[2]	12	[2]
Business loans | Lease financing | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	0		3		0		3
Subsequent Default During Period	0		0		0		0
Retail loans | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	13		8		13		8
Subsequent Default During Period	0		3		0		3
Retail loans | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	4		4		4		4
Subsequent Default During Period	0		0		0		0
Retail loans | Residential mortgage | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	3	[3]	8	[3]	3	[3]	8	[3]
Subsequent Default During Period	0		3		0		3
Retail loans | Residential mortgage | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	2		4		2		4
Subsequent Default During Period	0		0		0		0
Retail loans | Consumer | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	10		0		10		0
Subsequent Default During Period	0		0		0		0
Retail loans | Consumer | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	2		0		2		0
Subsequent Default During Period	0		0		0		0
Retail loans | Consumer | Home equity | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	7	[3]	0		7	[3]	0
Subsequent Default During Period	0		0		0		0
Retail loans | Consumer | Home equity | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	1		0		1		0
Subsequent Default During Period	0		0		0		0
Retail loans | Consumer | Other consumer | Principal Deferrals
Financing Receivable, Modifications [Line Items]
Balance	3	[3]	0		3	[3]	0
Subsequent Default During Period	0		0		0		0
Retail loans | Consumer | Other consumer | Interest Rate Reductions
Financing Receivable, Modifications [Line Items]
Balance	1		0		1		0
Subsequent Default During Period	$ 0		$ 0		$ 0		$ 0

[1] Primarily loans to real estate developers.

[2] Primarily loans secured by owner-occupied real estate.

[3] Includes bankruptcy loans for which the court has discharged the borrower's obligation and the borrower has not reaffirmed the debt.

XML

Medium- And Long-Term Debt (Narrative) (Details) (USD $)	3 Months Ended
	Sep. 30, 2013
Debt Instruments [Line Items]
Blanket lien on real-estate related loans securing FHLB advances	$ 13,000,000,000
Subsidiaries [Member] | Floating rate based on LIBOR index subordinated note due 2013 [Member]
Debt Instruments [Line Items]
Gains (Losses) on Extinguishment of Debt	1,000,000
Subordinated Debt	$ 25,000,000

XML

Fair Value Measurements (Estimated Fair Values Of Financial Instruments Not Recorded At Fair Value In Their Entirety On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Cash and due from banks	$ 1,384		$ 1,395
Federal funds sold	0		100
Interest-bearing deposits with banks	5,704		3,039
Total loans, net of allowance for loan losses	43,547		45,428
Demand deposits (noninterest-bearing)	23,896		23,279
Customer certificates of deposit	5,180		5,531
Total deposits	52,909		52,191
Short-term borrowings	226		110
Medium- and long-term debt	3,565		4,720
Fair value assets measured on nonrecurring basis impaired loans	189		214
Fair value assets measured on nonrecurring basis nonmarketable equity securities	1		2
Carrying Amount [Member]
Cash and due from banks	1,384		1,395
Federal funds sold			100
Interest-bearing deposits with banks	5,704		3,039
Loans held-for-sale	7		12
Total loans, net of allowance for loan losses	43,547	[1]	45,428	[1]
Customers' liability on acceptances outstanding	8		18
Nonmarketable equity securities	13	[2]	13	[2]
Restricted equity investments	133		174
Demand deposits (noninterest-bearing)	23,896		23,279
Interest-bearing deposits	23,833		23,381
Customer certificates of deposit	5,180		5,531
Total deposits	52,909		52,191
Short-term borrowings	226		110
Acceptances outstanding	8		18
Medium- and long-term debt	3,565		4,720
Credit-related financial instruments	(90)		(103)
Estimated Fair Value [Member]
Cash and due from banks	1,384		1,395
Federal funds sold			100
Interest-bearing deposits with banks	5,704		3,039
Loans held-for-sale	7		12
Total loans, net of allowance for loan losses	43,541	[1]	45,649	[1]
Customers' liability on acceptances outstanding	8		18
Nonmarketable equity securities	19	[2]	22	[2]
Restricted equity investments	133		174
Demand deposits (noninterest-bearing)	23,896		23,279
Interest-bearing deposits	23,833		23,381
Customer certificates of deposit	5,175		5,535
Total deposits	52,904		52,195
Short-term borrowings	226		110
Acceptances outstanding	8		18
Medium- and long-term debt	3,548		4,685
Credit-related financial instruments	(90)		(103)
Level 1
Cash and due from banks	1,384		1,395
Federal funds sold			100
Interest-bearing deposits with banks	5,704		3,039
Loans held-for-sale	0		0
Total loans, net of allowance for loan losses	0	[1]	0	[1]
Customers' liability on acceptances outstanding	8		18
Nonmarketable equity securities	0	[2]	0	[2]
Restricted equity investments	133		174
Demand deposits (noninterest-bearing)	0		0
Interest-bearing deposits	0		0
Customer certificates of deposit	0		0
Total deposits	0		0
Short-term borrowings	226		110
Acceptances outstanding	8		18
Medium- and long-term debt	0		0
Credit-related financial instruments	0		0
Level 2
Cash and due from banks	0		0
Federal funds sold			0
Interest-bearing deposits with banks	0		0
Loans held-for-sale	7		12
Total loans, net of allowance for loan losses	0	[1]	0	[1]
Customers' liability on acceptances outstanding	0		0
Nonmarketable equity securities	0	[2]	0	[2]
Restricted equity investments	0		0
Demand deposits (noninterest-bearing)	23,896		23,279
Interest-bearing deposits	23,833		23,381
Customer certificates of deposit	5,175		5,535
Total deposits	52,904		52,195
Short-term borrowings	0		0
Acceptances outstanding	0		0
Medium- and long-term debt	3,548		4,685
Credit-related financial instruments	0		0
Level 3
Cash and due from banks	0		0
Federal funds sold			0
Interest-bearing deposits with banks	0		0
Loans held-for-sale	0		0
Total loans, net of allowance for loan losses	43,541	[1]	45,649	[1]
Customers' liability on acceptances outstanding	0		0
Nonmarketable equity securities	19	[2]	22	[2]
Restricted equity investments	0		0
Demand deposits (noninterest-bearing)	0		0
Interest-bearing deposits	0		0
Customer certificates of deposit	0		0
Total deposits	0		0
Short-term borrowings	0		0
Acceptances outstanding	0		0
Medium- and long-term debt	0		0
Credit-related financial instruments	$ (90)		$ (103)

[1] Included $189 million and $214 million of impaired loans recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

[2] Included $1 million and $2 million of nonmarketable equity securities recorded at fair value on a nonrecurring basis at September 30, 2013 and December 31, 2012, respectively.

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Fair Value Measurements (Assets And Liabilities Recorded At Fair Value On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	$ 9,488	[1]	$ 10,297	[1]
Derivative assets	563		750
Derivative liabilities	39		73
U.S. Treasury and Other U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	45		35
Residential Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	9,089	[2]	9,920	[2]
State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	25		23
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	57		58
Equity and Other Non-Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	272		261
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	104		114
Investment securities available-for-sale	9,488		10,297
Derivative assets	565		753
Total assets at fair value	10,157		11,164
Derivative liabilities	288		409
Deferred compensation plan liabilities	92		88
Total liabilities at fair value	380		497
Recurring [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	98		88
Investment securities available-for-sale	176		140
Derivative assets	0		0
Total assets at fair value	274		228
Derivative liabilities	0		0
Deferred compensation plan liabilities	92		88
Total liabilities at fair value	92		88
Recurring [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	6		26
Investment securities available-for-sale	9,145		9,977
Derivative assets	563		750
Total assets at fair value	9,714		10,753
Derivative liabilities	286		408
Deferred compensation plan liabilities	0		0
Total liabilities at fair value	286		408
Recurring [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Investment securities available-for-sale	167		180
Derivative assets	2		3
Total assets at fair value	169		183
Derivative liabilities	2		1
Deferred compensation plan liabilities	0		0
Total liabilities at fair value	2		1
Recurring [Member] | Interest Rate Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	416		556
Derivative liabilities	147		218
Recurring [Member] | Interest Rate Contracts [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Derivative liabilities	0		0
Recurring [Member] | Interest Rate Contracts [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	416		556
Derivative liabilities	147		218
Recurring [Member] | Interest Rate Contracts [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Derivative liabilities	0		0
Recurring [Member] | Energy Derivative Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	128		173
Derivative liabilities	126		172
Recurring [Member] | Energy Derivative Contracts [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Derivative liabilities	0		0
Recurring [Member] | Energy Derivative Contracts [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	128		173
Derivative liabilities	126		172
Recurring [Member] | Energy Derivative Contracts [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Derivative liabilities	0		0
Recurring [Member] | Foreign Exchange Contracts [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	19		21
Derivative liabilities	13		18
Recurring [Member] | Foreign Exchange Contracts [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Derivative liabilities	0		0
Recurring [Member] | Foreign Exchange Contracts [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	19		21
Derivative liabilities	13		18
Recurring [Member] | Foreign Exchange Contracts [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Derivative liabilities	0		0
Recurring [Member] | Warrant [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2		3
Recurring [Member] | Warrant [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Recurring [Member] | Warrant [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	0		0
Recurring [Member] | Warrant [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets	2		3
Recurring [Member] | Other Derivative Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	2		1
Recurring [Member] | Other Derivative Liabilities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	0		0
Recurring [Member] | Other Derivative Liabilities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	0		0
Recurring [Member] | Other Derivative Liabilities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liabilities	2		1
Recurring [Member] | Deferred Compensation Plan Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	92		88
Recurring [Member] | Deferred Compensation Plan Assets [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	92		88
Recurring [Member] | Deferred Compensation Plan Assets [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Recurring [Member] | Deferred Compensation Plan Assets [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Recurring [Member] | U.S. Treasury and Other U.S. Government Agency Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	45		35
Recurring [Member] | U.S. Treasury and Other U.S. Government Agency Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	45		35
Recurring [Member] | U.S. Treasury and Other U.S. Government Agency Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	0		0
Recurring [Member] | U.S. Treasury and Other U.S. Government Agency Securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	0		0
Recurring [Member] | Residential Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3	[2]	4	[2]
Investment securities available-for-sale	9,089	[2]	9,920	[2]
Recurring [Member] | Residential Mortgage-Backed Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[2]
Investment securities available-for-sale	0	[2]	0	[2]
Recurring [Member] | Residential Mortgage-Backed Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	3	[2]	4	[2]
Investment securities available-for-sale	9,089	[2]	9,920	[2]
Recurring [Member] | Residential Mortgage-Backed Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	[2]	0	[2]
Investment securities available-for-sale	0	[2]	0	[2]
Recurring [Member] | State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2		19
Investment securities available-for-sale	25		23
Recurring [Member] | State And Municipal Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Investment securities available-for-sale	0		0
Recurring [Member] | State And Municipal Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	2		19
Investment securities available-for-sale	0		0
Recurring [Member] | State And Municipal Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Investment securities available-for-sale	25	[3]	23	[3]
Recurring [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1		3
Investment securities available-for-sale	57		58
Recurring [Member] | Corporate Debt Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Investment securities available-for-sale	0		0
Recurring [Member] | Corporate Debt Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	1		3
Investment securities available-for-sale	56		57
Recurring [Member] | Corporate Debt Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0		0
Investment securities available-for-sale	1	[3]	1	[3]
Recurring [Member] | Equity and Other Non-Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	6
Investment securities available-for-sale	272		261
Recurring [Member] | Equity and Other Non-Debt Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	6
Investment securities available-for-sale	131		105
Recurring [Member] | Equity and Other Non-Debt Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0
Investment securities available-for-sale	0		0
Recurring [Member] | Equity and Other Non-Debt Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0
Investment securities available-for-sale	$ 141	[3]	$ 156	[3]

[1] Included auction-rate securities at amortized cost and fair value of $176 million and $166 million, respectively, as of September 30, 2013 and $191 million and $180 million, respectively, as of December 31, 2012.

[2] Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

[3] Auction-rate securities.

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Fair Value Measurements (Changes In Level 3 Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Warrants
Balance at beginning of period	$ 3		$ 3		$ 3		$ 3
Realized gains (losses) recorded in earnings	7	[1]	0	[1]	8	[1]	3	[1]
Unrealized gains (losses) recorded in earnings	0		0	[1]	1	[1]	1	[1]
Gains (losses) recorded in other comprehensive income	0		0		0		0
Sales	(2)		0		(4)		(4)
Settlements	(6)		0		(6)		0
Balance at end of period	2		3		2		3
Other Derivative Liabilities [Member]
Balance at beginnning of period	3		0		1		6
Realized gains (losses) recorded in earnings	0		(1)	[2]	0		(1)	[2]
Unrealized gains (losses) recorded in earnings	0		0		(2)	[2]	0
Gains (losses) recorded in other comprehensive income	0		0		0		0
Sales	0		0		0		0
Settlements	1		1		1		7
Balance at end of period	2		0		2		0
Investment Securities Available-For-Sale [Member]
Balance at beginning of period	172		240		180		433
Realized gains (losses) recorded in earnings	1	[2]	1	[2]	1	[2]	12	[2]
Unrealized gains (losses) recorded in earnings	0		0		0		0
Gains (losses) recorded in other comprehensive income	5	[3]	(1)	[3]	1	[3]	11	[3]
Sales	(11)		(12)		(15)		(228)
Settlements	0		0		0		0
Balance at end of period	167		228		167		228
State And Municipal Securities [Member] | Investment Securities Available-For-Sale [Member]
Balance at beginning of period	25	[4]	24	[4]	23	[4]	24	[4]
Realized gains (losses) recorded in earnings	0	[4]	0	[4]	0	[4]	0	[4]
Unrealized gains (losses) recorded in earnings	0	[4]	0	[4]	0	[4]	0	[4]
Gains (losses) recorded in other comprehensive income	0	[4]	(1)	[3],[4]	2	[3],[4]	0	[4]
Sales	0	[4]	0	[4]	0	[4]	(1)	[4]
Settlements	0	[4]	0	[4]	0	[4]	0	[4]
Balance at end of period	25	[4]	23	[4]	25	[4]	23	[4]
Corporate Debt Securities [Member] | Investment Securities Available-For-Sale [Member]
Balance at beginning of period	1	[4]	1	[4]	1	[4]	1	[4]
Realized gains (losses) recorded in earnings	0	[4]	0	[4]	0	[4]	0	[4]
Unrealized gains (losses) recorded in earnings	0	[4]	0	[4]	0	[4]	0	[4]
Gains (losses) recorded in other comprehensive income	0	[4]	0	[4]	0	[4]	0	[4]
Sales	0	[4]	0	[4]	0	[4]	0	[4]
Settlements	0	[4]	0	[4]	0	[4]	0	[4]
Balance at end of period	1	[4]	1	[4]	1	[4]	1	[4]
Equity and Other Non-Debt Securities [Member] | Investment Securities Available-For-Sale [Member]
Balance at beginning of period	146	[4]	215	[4]	156	[4]	408	[4]
Realized gains (losses) recorded in earnings	1	[2],[4]	1	[2],[4]	1	[2],[4]	12	[2],[4]
Unrealized gains (losses) recorded in earnings	0	[4]	0	[4]	0	[4]	0	[4]
Gains (losses) recorded in other comprehensive income	5	[3],[4]	0	[4]	(1)	[3],[4]	11	[3],[4]
Sales	(11)	[4]	(12)	[4]	(15)	[4]	(227)	[4]
Settlements	0	[4]	0	[4]	0	[4]	0	[4]
Balance at end of period	$ 141	[4]	$ 204	[4]	$ 141	[4]	$ 204	[4]

[1] Realized and unrealized gains and losses due to changes in fair value recorded in "other noninterest income" on the consolidated statements of comprehensive income.

[2] Realized and unrealized gains and losses due to changes in fair value recorded in "net securities gains (losses)" on the consolidated statements of comprehensive income.

[3] Recorded in "net unrealized gains (losses) on investment securities available-for-sale" in other comprehensive income.

[4] Auction-rate securities.

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Variable Interest Entities (VIEs)

9 Months Ended

Sep. 30, 2013

Variable Interest Entity, Not Primary Beneficiary, Disclosures [Abstract]

Variable Interest Entities (VIEs)

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 following provides a summary of the VIEs in which the Corporation has an interest.

The Corporation holds ownership interests in funds in the form of limited partnerships or limited liability companies (LLCs) investing in low income housing projects. The Corporation also directly invests in limited partnerships and LLCs which invest in community development projects which generate similar tax credits to investors. 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. While the partnership/LLC agreements allow the limited partners/investor members, through a majority vote, to remove the general partner/managing member, this right is not deemed to be substantive as the general partner/managing member can only be removed for cause.

The Corporation accounts for its interest in these entities on either the cost or equity method. Exposure to loss as a result of the Corporation’s involvement with these entities at September 30, 2013 was limited to approximately $386 million, which reflected the carrying value of the Corporation's investment and unfunded commitments for future investments.

As an investor, the Corporation obtains income tax credits and deductions from the operating losses of these tax credit entities. The income tax credits and deductions are allocated to the investors based on their ownership percentages and are recorded as a reduction of income tax expense (or an increase to income tax benefit) and a reduction of federal income taxes payable. Investment balances, including all legally binding commitments to fund future investments, are included in “accrued income and other assets” on the consolidated balance sheets, with amortization and other write-downs of investments recorded in “other noninterest income” on the consolidated statements of comprehensive income. In addition, 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 ($135 million at September 30, 2013).

The Corporation provided no financial or other support that was not contractually required to any of the above VIEs during the nine months ended September 30, 2013 and 2012.

The following table summarizes the impact of these VIEs on line items on the Corporation’s consolidated statements of comprehensive income.

	Three Months Ended September 30,						Nine Months Ended September 30,
(in millions)	2013			2012			2013			2012
Other noninterest income	$	(14	)	$	(15	)	$	(41	)	$	(43	)
Benefit for income taxes (a)	(15		)	(14		)	(43		)	(41		)

(a) Income tax credits from low income housing tax credit/historic rehabilitation tax credit partnerships.

For further information on the Corporation’s consolidation policy, see Note 1 to the consolidated financial statements in the Corporation's 2012 Annual Report.

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Derivative And Credit-Related Financial Instruments (Summary Of Internally Classified Watch List Letters Of Credit) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Derivative And Credit-Related Financial Instruments [Abstract]
Total watch list standby and commercial letters of credit	$ 76	$ 144
As a percentage of total outstanding standby and commercial letters of credit	1.70%	2.90%

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Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Basic And Diluted Net Income Per Common Share

Basic and diluted net income per common share are presented in the following table.

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions, except per share data)	2013		2012		2013		2012
Basic and diluted
Net income	$	147	$	117	$	424	$	391
Less:
Income allocated to participating securities	2		1		6		4
Net income attributable to common shares	$	145	$	116	$	418	$	387
Basic average common shares	182		190		184		193
Basic net income per common share	$	0.80	$	0.61	$	2.28	$	2.00
Basic average common shares	182		190		184		193
Dilutive common stock equivalents:
Net effect of the assumed exercise of stock options	1		—		1		—
Net effect of the assumed exercise of warrants	4		1		2		1
Diluted average common shares	187		191		187		194
Diluted net income per common share	$	0.78	$	0.61	$	2.23	$	2.00

Schedule of Average Shares Excluded From Diluted Net Income Per Common Share Computation

The following average shares related to outstanding options and warrants to purchase shares of common stock were not included in the computation of diluted net income per common share because the prices of the options and warrants were greater than the average market price of common shares for the period.

	Three Months Ended September 30,		Nine Months Ended September 30,
(shares in millions)	2013	2012	2013	2012
Average outstanding options	8.2	15.2	11.8	16.2
Range of exercise prices	$41.70 - $61.94	$31.51 - $61.94	$34.78 - $61.94	$30.77 - $64.50
Average outstanding warrants				0.2
Exercise price				$30.36

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Investment Securities (Summary Of Investment Securities Available-For-Sale In Unrealized Loss Positions) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Temporarily Impaired Less than 12 months, Fair Value	$ 5,167		$ 0
Temporarily Impaired Less than 12 months, Unrealized Losses	145		0
Temporarily Impaired 12 months or more, Fair Value	167		180
Temporarily Impaired 12 months or more, Unrealized Losses	10		11
Temporarily Impaired Total, Fair Value	5,334		180
Temporarily Impaired Total, Unrealized Losses	155		11
Residential Mortgage-Backed Securities [Member]
Temporarily Impaired Less than 12 months, Fair Value	5,167	[1]
Temporarily Impaired Less than 12 months, Unrealized Losses	145	[1]
Temporarily Impaired 12 months or more, Fair Value	0	[1]
Temporarily Impaired 12 months or more, Unrealized Losses	0	[1]
Temporarily Impaired Total, Fair Value	5,167	[1]
Temporarily Impaired Total, Unrealized Losses	145	[1]
State And Municipal Securities [Member]
Temporarily Impaired Less than 12 months, Fair Value	0	[2]	0	[2]
Temporarily Impaired Less than 12 months, Unrealized Losses	0	[2]	0	[2]
Temporarily Impaired 12 months or more, Fair Value	25	[2]	23	[2]
Temporarily Impaired 12 months or more, Unrealized Losses	2	[2]	4	[2]
Temporarily Impaired Total, Fair Value	25	[2]	23	[2]
Temporarily Impaired Total, Unrealized Losses	2	[2]	4	[2]
Corporate Debt Securities [Member]
Temporarily Impaired Less than 12 months, Fair Value	0	[2]	0	[2]
Temporarily Impaired Less than 12 months, Unrealized Losses	0	[2]	0	[2]
Temporarily Impaired 12 months or more, Fair Value	1	[2]	1	[2]
Temporarily Impaired 12 months or more, Unrealized Losses	0	[2],[3]	0	[2],[3]
Temporarily Impaired Total, Fair Value	1	[2]	1	[2]
Temporarily Impaired Total, Unrealized Losses	0	[2],[3]	0	[2],[3]
Equity and Other Non-Debt Securities [Member]
Temporarily Impaired Less than 12 months, Fair Value	0	[2]	0	[2]
Temporarily Impaired Less than 12 months, Unrealized Losses	0	[2]	0	[2]
Temporarily Impaired 12 months or more, Fair Value	141	[2]	156	[2]
Temporarily Impaired 12 months or more, Unrealized Losses	8	[2]	7	[2]
Temporarily Impaired Total, Fair Value	141	[2]	156	[2]
Temporarily Impaired Total, Unrealized Losses	$ 8	[2]	$ 7	[2]

[1] Residential mortgage-backed securities issued and/or guaranteed by U.S. government agencies or U.S. government-sponsored enterprises.

[2] Auction-rate securities.

[3] Unrealized losses less than $0.5 million.

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Net Income Per Common Share

9 Months Ended

Sep. 30, 2013

Earnings Per Share [Abstract]

Net Income Per Common Share

NET INCOME PER COMMON SHARE

Basic and diluted net income per common share are presented in the following table.

	Three Months Ended September 30,				Nine Months Ended September 30,
(in millions, except per share data)	2013		2012		2013		2012
Basic and diluted
Net income	$	147	$	117	$	424	$	391
Less:
Income allocated to participating securities	2		1		6		4
Net income attributable to common shares	$	145	$	116	$	418	$	387
Basic average common shares	182		190		184		193
Basic net income per common share	$	0.80	$	0.61	$	2.28	$	2.00
Basic average common shares	182		190		184		193
Dilutive common stock equivalents:
Net effect of the assumed exercise of stock options	1		—		1		—
Net effect of the assumed exercise of warrants	4		1		2		1
Diluted average common shares	187		191		187		194
Diluted net income per common share	$	0.78	$	0.61	$	2.23	$	2.00

The following average shares related to outstanding options and warrants to purchase shares of common stock were not included in the computation of diluted net income per common share because the prices of the options and warrants were greater than the average market price of common shares for the period.

	Three Months Ended September 30,		Nine Months Ended September 30,
(shares in millions)	2013	2012	2013	2012
Average outstanding options	8.2	15.2	11.8	16.2
Range of exercise prices	$41.70 - $61.94	$31.51 - $61.94	$34.78 - $61.94	$30.77 - $64.50
Average outstanding warrants				0.2
Exercise price				$30.36

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Business Segment Information (Business Segment Financial Results) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Net interest income (expense) (FTE)			$ 1,244		$ 1,306
Provision for credit losses	8	22	37		63
Noninterest income	214	197	622		614
Noninterest expenses	417	449	1,249		1,330
Provision (benefit) for income taxes (FTE)			156		136
Net income (loss)	147	117	424		391
Net credit-related charge-offs			60		133
Assets, average	63,710	62,008	63,710		62,008
Loans, average			44,533		43,034
Deposits, average			51,355		48,947
Return on average assets			0.89%	[1]	0.84%	[1]
Efficiency ratio			66.89%	[2]	69.62%	[2]
Business Bank
Net interest income (expense) (FTE)			1,115		1,131
Provision for credit losses			29		28
Noninterest income			246		240
Noninterest expenses			446		453
Provision (benefit) for income taxes (FTE)			271		273
Net income (loss)			615		617
Net credit-related charge-offs			37		81
Assets, average	35,697	34,140	35,697		34,140
Loans, average			34,626		33,183
Deposits, average			25,931		24,430
Return on average assets			2.30%	[1]	2.41%	[1]
Efficiency ratio			32.74%	[2]	33.08%	[2]
Retail Bank
Net interest income (expense) (FTE)			460		491
Provision for credit losses			21		16
Noninterest income			132		131
Noninterest expenses			530		543
Provision (benefit) for income taxes (FTE)			14		21
Net income (loss)			27		42
Net credit-related charge-offs			18		34
Assets, average	5,967	6,027	5,967		6,027
Loans, average			5,278		5,326
Deposits, average			21,183		20,527
Return on average assets			0.17%	[1]	0.26%	[1]
Efficiency ratio			89.19%	[2]	87.14%	[2]
Wealth Management
Net interest income (expense) (FTE)			138		140
Provision for credit losses			(8)		18
Noninterest income			191		193
Noninterest expenses			238		236
Provision (benefit) for income taxes (FTE)			35		28
Net income (loss)			64		51
Net credit-related charge-offs			5		18
Assets, average	4,785	4,602	4,785		4,602
Loans, average			4,629		4,525
Deposits, average			3,722		3,640
Return on average assets			1.78%	[1]	1.49%	[1]
Efficiency ratio			72.64%	[2]	73.30%	[2]
Finance
Net interest income (expense) (FTE)			(492)		(483)
Provision for credit losses			0		0
Noninterest income			47		44
Noninterest expenses			7		8
Provision (benefit) for income taxes (FTE)			(168)		(167)
Net income (loss)			(284)		(280)
Net credit-related charge-offs			0		0
Assets, average	11,553	11,796	11,553		11,796
Loans, average			0		0
Deposits, average			309		171
Other
Net interest income (expense) (FTE)			23		27
Provision for credit losses			(5)		1
Noninterest income			6		6
Noninterest expenses			28		90
Provision (benefit) for income taxes (FTE)			4		(19)
Net income (loss)			2		(39)
Net credit-related charge-offs			0		0
Assets, average	5,708	5,443	5,708		5,443
Loans, average			0		0
Deposits, average			$ 210		$ 179

[1] Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

[2] Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains.

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Derivative And Credit-Related Financial Instruments

9 Months Ended

Sep. 30, 2013

Derivative And Credit-Related Financial Instruments [Abstract]

Derivative And Credit-Related Financial Instruments

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. The Corporation presents derivative instruments at fair value in the consolidated balance sheets on a net basis when a right of offset exists, based on transactions with a single counterparty and any cash collateral paid to and/or received from that counterparty for derivative contracts that are subject to legally enforceable master netting arrangements. Market and credit risk are included in the determination of fair value.

Market risk is the potential loss that may result from movements in interest rates, foreign currency exchange rates or energy commodity prices that cause an unfavorable change in the value of a financial instrument. The Corporation manages this risk by establishing monetary exposure limits and monitoring compliance with those limits. Market risk inherent in interest rate and energy contracts entered into on behalf of customers is mitigated by taking offsetting positions, except in those circumstances when the amount, tenor and/or contract rate level results in negligible economic risk, whereby the cost of purchasing an offsetting contract is not economically justifiable. The Corporation mitigates most of the inherent market risk in foreign exchange contracts entered into on behalf of customers by taking offsetting positions and manages the remainder through individual foreign currency position limits and aggregate value-at-risk limits. These limits are established annually and reviewed quarterly. Market risk inherent in derivative instruments held or issued for risk management purposes is typically offset by changes in the fair value of the assets or liabilities being hedged.

Credit risk is the possible loss that may occur in the event of nonperformance by the counterparty to a financial instrument. The Corporation attempts to minimize credit risk arising from customer-initiated derivatives by evaluating the creditworthiness of each customer, adhering to the same credit approval process used for traditional lending activities and obtaining collateral as deemed necessary. For derivatives with dealer counterparties, the Corporation utilizes counterparty risk limits and monitoring procedures as well as master netting arrangements and bilateral collateral agreements to facilitate the management of credit risk. Master netting arrangements effectively reduce credit risk by permitting settlement of positive and negative positions and offset cash collateral held with the same counterparty on a net basis. Bilateral collateral agreements require daily exchange of cash or highly rated securities issued by the U.S. Treasury or other U.S. government entities to collateralize amounts due to either party beyond certain risk limits. At September 30, 2013, counterparties with bilateral collateral agreements had pledged $141 million of marketable investment securities and deposited $1 million of cash with the Corporation to secure the fair value of contracts in an unrealized gain position, and the Corporation had pledged $22 million of investment securities and posted $8 million of cash as collateral for contracts in an unrealized loss position. For those counterparties not covered under bilateral collateral agreements, collateral is obtained, if deemed necessary, based on the results of management’s credit evaluation of the counterparty. Collateral varies, but may include cash, investment securities, accounts receivable, equipment or real estate. Included in the fair value of derivative instruments are credit valuation adjustments reflecting counterparty credit risk. These adjustments are determined by applying a credit spread for the counterparty or the Corporation, as appropriate, to the total expected exposure of the derivative.

The aggregate fair value of all derivative instruments with credit-risk-related contingent features that were in a liability position on September 30, 2013 was $13 million, for which the Corporation had pledged collateral of $8 million in the normal course of business. The credit-risk-related contingent features require the Corporation’s debt to maintain an investment grade credit rating from each of the major credit rating agencies. If the Corporation’s debt were to fall below investment grade, the counterparties to the derivative instruments could require additional overnight collateral on derivative instruments in net liability positions. If the credit-risk-related contingent features underlying these agreements had been triggered on September 30, 2013, the Corporation would have been required to assign an additional $5 million of collateral to its counterparties.

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.

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 September 30, 2013 and December 31, 2012. The table excludes commitments, warrants accounted for as derivatives and a derivative related to the Corporation’s 2008 sale of its remaining ownership of Visa shares.

	September 30, 2013								December 31, 2012
			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
Risk management purposes
Derivatives designated as hedging instruments
Interest rate contracts:
Swaps - fair value - receive fixed/pay floating	$	1,450	$	221		$	—		$	1,450	$	290		$	—
Derivatives used as economic hedges
Foreign exchange contracts:
Spot, forwards and swaps	316		3			—			475		1			—
Total risk management purposes	1,766		224			—			1,925		291			—
Customer-initiated and other activities
Interest rate contracts:
Caps and floors written	544		—			3			545		—			3
Caps and floors purchased	544		3			—			545		3			—
Swaps	11,072		192			144			10,952		263			215
Total interest rate contracts	12,160		195			147			12,042		266			218
Energy contracts:
Caps and floors written	1,642		1			75			1,873		—			112
Caps and floors purchased	1,642		75			1			1,873		112			—
Swaps	2,439		52			50			1,815		61			60
Total energy contracts	5,723		128			126			5,561		173			172
Foreign exchange contracts:
Spot, forwards, options and swaps	1,798		16			13			2,253		20			18
Total customer-initiated and other activities	19,681		339			286			19,856		459			408
Total gross derivatives	$	21,447	563			286			$	21,781	750			408
Amounts offset in the consolidated balance sheets:
Netting adjustment - Offsetting derivative assets/liabilities			(227		)	(227		)			(279		)	(279		)
Netting adjustment - Cash collateral received/posted			(1		)	(8		)			(11		)	—
Net derivatives included in the consolidated balance sheets (b)			335			51					460			129
Amounts not offset in the consolidated balance sheets:
Marketable securities pledged under bilateral collateral agreements			(141		)	(12		)			(180		)	(56		)
Net derivatives after deducting amounts not offset in the consolidated balance sheets			$	194		$	39				$	280		$	73

(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 totaled $2 million and $4 million at September 30, 2013 and December 31, 2012, respectively.

Risk Management

As an end-user, the Corporation employs a variety of financial instruments for risk management purposes, including cash instruments, such as investment securities, as well as derivative instruments. Activity related to these instruments is centered predominantly in the interest rate markets and mainly involves interest rate swaps. Various other types of instruments also may be used to manage exposures to market risks, including interest rate caps and floors, total return swaps, foreign exchange forward contracts and foreign exchange swap agreements.

As part of a fair value hedging strategy, the Corporation entered into interest rate swap agreements for interest rate risk management purposes. These interest rate swap agreements effectively modify the Corporation’s exposure to interest rate risk by converting fixed-rate debt to a floating rate. These agreements involve the receipt of fixed-rate interest amounts in exchange for floating-rate interest payments over the life of the agreement, without an exchange of the underlying principal amount. Risk management fair value interest rate swaps generated net interest income of $18 million and $54 million for the three- and nine-month periods ended September 30, 2013, respectively, compared to $17 million and $51 million for the three- and nine-month periods ended September 30, 2012, respectively. The Corporation recognized an insignificant amount of net gains (losses) in "other noninterest income" in the consolidated statements of comprehensive income for the ineffective portion of risk management derivative instruments designated as fair value hedges of fixed-rate debt for both the three- and nine-month periods ended September 30, 2013 and 2012.

Foreign exchange rate risk arises from changes in the value of certain assets and liabilities denominated in foreign currencies. The Corporation employs spot and forward contracts in addition to swap contracts to manage exposure to these and other risks.

The Corporation recognized an insignificant amount of net gains on risk management derivative instruments used as economic hedges in "other noninterest income" in the consolidated statements of comprehensive income for both the three- and nine-month periods ended September 30, 2013 and 2012.

The following table summarizes the expected weighted average remaining maturity of the notional amount of risk management interest rate swaps and the weighted average interest rates associated with amounts expected to be received or paid on interest rate swap agreements as of September 30, 2013 and December 31, 2012.

			Weighted Average
(dollar amounts in millions)	Notional Amount		Remaining Maturity (in years)	Receive Rate		Pay Rate (a)
September 30, 2013
Swaps - fair value - receive fixed/pay floating rate
Medium- and long-term debt designation	$	1,450	3.7	5.45	%	0.42	%
December 31, 2012
Swaps - fair value - receive fixed/pay floating rate
Medium- and long-term debt designation	1,450		4.4	5.45		0.62

(a) Variable rates paid on receive fixed swaps are based on six-month LIBOR rates in effect at September 30, 2013 and December 31, 2012.

Management believes these hedging strategies achieve the desired relationship between the rate maturities of assets and funding sources which, in turn, reduce the overall exposure of net interest income to interest rate risk, although there can be no assurance that such strategies will be successful.

Customer-Initiated and Other

The Corporation enters into derivative transactions at the request of customers and generally takes offsetting positions with dealer counterparties to mitigate the inherent market risk. Income primarily results from the spread between the customer derivative and the offsetting dealer position.

For customer-initiated foreign exchange contracts where offsetting positions have not been taken, the Corporation manages the remaining inherent market risk through individual foreign currency position limits and aggregate value-at-risk limits. These limits are established annually and reviewed quarterly. For those customer-initiated derivative contracts which were not offset or where the Corporation holds a speculative position within the limits described above, the Corporation recognized an insignificant amount of net gains in “other noninterest income” in the consolidated statements of comprehensive income for both the three- and nine-month periods ended September 30, 2013 and 2012.

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 September 30,				Nine Months Ended September 30,
(in millions)	Location of Gain	2013		2012		2013		2012
Interest rate contracts	Other noninterest income	$	8	$	5	$	17	$	14
Energy contracts	Other noninterest income	—		1		2		3
Foreign exchange contracts	Foreign exchange income	8		8		26		26
Total		$	16	$	14	$	45	$	43

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)	September 30, 2013		December 31, 2012
Unused commitments to extend credit:
Commercial and other	$	27,975	$	25,659
Bankcard, revolving check credit and home equity loan commitments	1,824		1,681
Total unused commitments to extend credit	$	29,799	$	27,340
Standby letters of credit	$	4,484	$	4,985
Commercial letters of credit	96		78
Other credit-related financial instruments	2		1

The Corporation maintains an allowance to cover probable credit losses inherent in lending-related commitments, including unused commitments to extend credit, letters of credit and financial guarantees. At September 30, 2013 and December 31, 2012, 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 $32 million, respectively. In 2011, the Corporation recorded a purchase discount for acquired lending-related commitments. An allowance for credit losses will be recorded on acquired lending-related commitments only to the extent that the required allowance exceeds the remaining purchase discount. At both September 30, 2013 and December 31, 2012, no allowance was recorded for acquired lending-related commitments, and $1 million and $2 million of purchase discount remained at each respective period.

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 $19 million at both September 30, 2013 and December 31, 2012 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 2022. 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 $307 million and $325 million, respectively, of the $4.6 billion and $5.1 billion standby and commercial letters of credit outstanding at September 30, 2013 and December 31, 2012, 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 $67 million at September 30, 2013, including $55 million in deferred fees and $12 million in the allowance for credit losses on lending-related commitments. At December 31, 2012, the comparable amounts were $82 million, $69 million and $13 million, respectively.

The following table presents a summary of internally classified watch list standby and commercial letters of credit at September 30, 2013 and December 31, 2012. The Corporation's internal watch 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.

(dollar amounts in millions)	September 30, 2013			December 31, 2012
Total watch list standby and commercial letters of credit	$	76		$	144
As a percentage of total outstanding standby and commercial letters of credit	1.7		%	2.9		%

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 September 30, 2013 and December 31, 2012, the total notional amount of the credit risk participation agreements was approximately $661 million and $574 million, respectively, and the fair value, included in customer-initiated interest rate contracts recorded in "accrued expenses and other liabilities" on the consolidated balance sheets, was insignificant for each period. The maximum estimated exposure to these agreements, as measured by projecting a maximum value of the guaranteed derivative instruments, assuming 100 percent default by all obligors on the maximum values, was approximately $8 million and $11 million at September 30, 2013 and December 31, 2012, 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 September 30, 2013, the weighted average remaining maturity of outstanding credit risk participation agreements was 2.8 years.

In 2008, the Corporation sold its remaining ownership of Visa Class B shares and entered into a derivative contract. Under the terms of the derivative contract, the Corporation will compensate the counterparty primarily for dilutive adjustments made to the conversion factor of the Visa Class B shares to Class A shares based on the ultimate outcome of litigation involving Visa. Conversely, the Corporation will be compensated by the counterparty for any increase in the conversion factor from anti-dilutive adjustments. The notional amount of the derivative contract was equivalent to approximately 780,000 Visa Class B shares. The fair value of the derivative liability, included in "accrued expenses and other liabilities" on the consolidated balance sheets, was $2 million at September 30, 2013 and $1 million at December 31, 2012.

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Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES
Net income	$ 424	$ 391
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	37	63
Provision (benefit) for deferred income taxes	(6)	69
Depreciation and amortization	92	100
Net periodic defined benefit cost	65	60
Share-based compensation expense	27	29
Net amortization of securities	21	35
Accretion of loan purchase discount	(26)	(58)
Net securities losses (gains)	1	(11)
Excess tax benefits from share-based compensation arrangements	(3)	(1)
Net change in trading securities	15	14
Net change in accrued income receivable	9	3
Net change in accrued expenses payable	(13)	(21)
Other, net	(193)	72
Net cash provided by operating activities	450	745
INVESTING ACTIVITIES
Maturities and redemptions of investment securities available-for-sale	2,418	2,817
Purchases of investment securities available-for-sale	(1,899)	(3,194)
Net change in loans	1,864	(1,620)
Sales of Federal Home Loan Bank stock	(41)	(3)
Other, net	(60)	(29)
Net cash provided by (used in) investing activities	2,364	(2,023)
FINANCING ACTIVITIES
Net change in deposits	999	2,141
Net change in short-term borrowings	116	(7)
Maturities and redemptions of medium- and long-term debt	(1,080)	(193)
Repurchases of common stock	(218)	(215)
Cash dividends paid on common stock	(92)	(69)
Excess tax benefits from share-based compensation arrangements	3	1
Other, net	12	2
Net cash (used in) provided by financing activities	(260)	1,660
Net increase in cash and cash equivalents	2,554	382
Cash and cash equivalents at beginning of period	4,534	3,556
Cash and cash equivalents at end of period	7,088	3,938
Interest paid	88	101
Income taxes, tax deposits and tax-related interest paid	104	38
Noncash investing and financing activities:
Loans transferred to other real estate	$ 10	$ 31

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Credit Quality And Allowance For Credit Losses (Average Individually Evaluated Impaired Loans And Related Interest Recognized) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	$ 351		$ 601		$ 379		$ 681
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	1		2		4		6
Business loans
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	304		553		332		632
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	1		2		4		6
Business loans | Commercial
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	96		193		105		215
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0		1		2		3
Business loans | Real estate construction
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	24		52		25		71
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0		0		0		0
Business loans | Real estate construction | Commercial Real Estate business line
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	24	[1]	48	[1]	25	[1]	66	[1]
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0	[1]	0	[1]	0	[1]	0	[1]
Business loans | Real estate construction | Other business lines
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	0	[2]	4	[2]	0	[2]	5	[2]
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0	[2]	0	[2]	0	[2]	0	[2]
Business loans | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	184		305		201		340
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	1		1		2		3
Business loans | Commercial mortgage | Commercial Real Estate business line
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	78	[1]	135	[1]	87	[1]	149	[1]
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0	[1]	0	[1]	0	[1]	0	[1]
Business loans | Commercial mortgage | Other business lines
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	106	[2]	170	[2]	114	[2]	191	[2]
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	1	[2]	1	[2]	2	[2]	3	[2]
Business loans | Lease financing
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	0		3		1		3
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0		0		0		0
Business loans | International
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period					0		3
Individually Evaluated Impaired Loans Interest Income Recognized for the Period					0		0
Retail loans
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	47		48		47		49
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0		0		0		0
Retail loans | Residential mortgage
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	35		40		36		42
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0		0		0		0
Retail loans | Consumer
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	12		8		11		7
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0		0		0		0
Retail loans | Consumer | Home equity
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	8		5		7		4
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	0		0		0		0
Retail loans | Consumer | Other consumer
Financing Receivable, Impaired [Line Items]
Individually Evaluated Impaired Loans Average Balance for the Period	4		3		4		3
Individually Evaluated Impaired Loans Interest Income Recognized for the Period	$ 0		$ 0		$ 0		$ 0

[1] Primarily loans to real estate developers.

[2] Primarily loans secured by owner-occupied real estate.

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Credit Quality And Allowance For Credit Losses (Loans By Credit Quality Indicator) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 44,151		$ 46,057
Special mention loans considered pass by regulatory authorities	201		303
Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	41,475	[1]	42,969	[1]
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,325	[2]	1,482	[2]
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	914	[3]	1,087	[3]
Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	437	[4]	519	[4]
Business loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	40,349		42,377
Business loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	37,819	[1]	39,461	[1]
Business loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,297	[2]	1,437	[2]
Business loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	895	[3]	1,065	[3]
Business loans | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	338	[4]	414	[4]
Business loans | Commercial
Financing Receivable, Recorded Investment [Line Items]
Total loans	27,897		29,513
Business loans | Commercial | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	26,296	[1]	28,032	[1]
Business loans | Commercial | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	965	[2]	820	[2]
Business loans | Commercial | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	529	[3]	558	[3]
Business loans | Commercial | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	107	[4]	103	[4]
Business loans | Real estate construction
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,552		1,240
Business loans | Real estate construction | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,493	[1]	1,097	[1]
Business loans | Real estate construction | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	14	[2]	80	[2]
Business loans | Real estate construction | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	20	[3]	30	[3]
Business loans | Real estate construction | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	25	[4]	33	[4]
Business loans | Real estate construction | Commercial Real Estate business line
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,283	[5]	1,049	[5]
Business loans | Real estate construction | Commercial Real Estate business line | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,231	[1],[5]	921	[1],[5]
Business loans | Real estate construction | Commercial Real Estate business line | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	13	[2],[5]	77	[2],[5]
Business loans | Real estate construction | Commercial Real Estate business line | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	15	[3],[5]	21	[3],[5]
Business loans | Real estate construction | Commercial Real Estate business line | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	24	[4],[5]	30	[4],[5]
Business loans | Real estate construction | Other business lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	269	[6]	191	[6]
Business loans | Real estate construction | Other business lines | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	262	[1],[6]	176	[1],[6]
Business loans | Real estate construction | Other business lines | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	1	[2],[6]	3	[2],[6]
Business loans | Real estate construction | Other business lines | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	5	[3],[6]	9	[3],[6]
Business loans | Real estate construction | Other business lines | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	1	[4],[6]	3	[4],[6]
Business loans | Commercial mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans	8,785		9,472
Business loans | Commercial mortgage | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,959	[1]	8,262	[1]
Business loans | Commercial mortgage | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	285	[2]	471	[2]
Business loans | Commercial mortgage | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	335	[3]	464	[3]
Business loans | Commercial mortgage | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	206	[4]	275	[4]
Business loans | Commercial mortgage | Commercial Real Estate business line
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,592	[5]	1,873	[5]
Business loans | Commercial mortgage | Commercial Real Estate business line | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,357	[1],[5]	1,479	[1],[5]
Business loans | Commercial mortgage | Commercial Real Estate business line | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	107	[2],[5]	213	[2],[5]
Business loans | Commercial mortgage | Commercial Real Estate business line | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	61	[3],[5]	87	[3],[5]
Business loans | Commercial mortgage | Commercial Real Estate business line | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	67	[4],[5]	94	[4],[5]
Business loans | Commercial mortgage | Other business lines
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,193	[6]	7,599	[6]
Business loans | Commercial mortgage | Other business lines | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	6,602	[1],[6]	6,783	[1],[6]
Business loans | Commercial mortgage | Other business lines | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	178	[2],[6]	258	[2],[6]
Business loans | Commercial mortgage | Other business lines | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	274	[3],[6]	377	[3],[6]
Business loans | Commercial mortgage | Other business lines | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	139	[4],[6]	181	[4],[6]
Business loans | Lease financing
Financing Receivable, Recorded Investment [Line Items]
Total loans	829		859
Business loans | Lease financing | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	821	[1]	840	[1]
Business loans | Lease financing | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	6	[2]	9	[2]
Business loans | Lease financing | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	2	[3]	7	[3]
Business loans | Lease financing | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	[4]	3	[4]
Business loans | International
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,286		1,293
Business loans | International | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,250	[1]	1,230	[1]
Business loans | International | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	27	[2]	57	[2]
Business loans | International | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	9	[3]	6	[3]
Business loans | International | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	[4]	0	[4]
Retail loans
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,802		3,680
Retail loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,656	[1]	3,508	[1]
Retail loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	28	[2]	45	[2]
Retail loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	19	[3]	22	[3]
Retail loans | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	99	[4]	105	[4]
Retail loans | Residential mortgage
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,650		1,527
Retail loans | Residential mortgage | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,576	[1]	1,438	[1]
Retail loans | Residential mortgage | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	4	[2]	12	[2]
Retail loans | Residential mortgage | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	7	[3]	7	[3]
Retail loans | Residential mortgage | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	63	[4]	70	[4]
Retail loans | Consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,152		2,153
Retail loans | Consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,080	[1]	2,070	[1]
Retail loans | Consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	24	[2]	33	[2]
Retail loans | Consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	12	[3]	15	[3]
Retail loans | Consumer | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	36	[4]	35	[4]
Retail loans | Consumer | Home equity
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,501		1,537
Retail loans | Consumer | Home equity | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,450	[1]	1,489	[1]
Retail loans | Consumer | Home equity | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	12	[2]	11	[2]
Retail loans | Consumer | Home equity | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	5	[3]	6	[3]
Retail loans | Consumer | Home equity | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	34	[4]	31	[4]
Retail loans | Consumer | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Total loans	651		616
Retail loans | Consumer | Other consumer | Pass
Financing Receivable, Recorded Investment [Line Items]
Total loans	630	[1]	581	[1]
Retail loans | Consumer | Other consumer | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total loans	12	[2]	22	[2]
Retail loans | Consumer | Other consumer | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total loans	7	[3]	9	[3]
Retail loans | Consumer | Other consumer | Nonaccrual
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 2	[4]	$ 4	[4]

[1] Includes all loans not included in the categories of special mention, substandard or nonaccrual.

[2] 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. Included in the special mention category were $201 million and $303 million at September 30, 2013 and December 31, 2012, respectively, of loans proactively monitored by management that were considered “pass” by regulatory authorities.

[3] 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. PCI loans are included in the substandard category. This category is generally consistent with the "substandard" category as defined by regulatory authorities.

[4] 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 - Summary of Significant Accounting Policies - on page F-59 in the Corporation's 2012 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.

[5] Primarily loans to real estate developers.

[6] Primarily loans secured by owner-occupied real estate.

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Basis of Presentation and Accounting Policies Basis of Presentation and Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Accounting Policies [Abstract]
Increase in Allowance due to Enhancements in Methodology	$ 40

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Medium- And Long-Term Debt (Schedule Of Medium- And Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Debt Instruments [Line Items]
Total medium- and long-term debt	$ 3,565	$ 4,720
Parent Company
Debt Instruments [Line Items]
Total medium- and long-term debt	620	629
Subsidiaries
Debt Instruments [Line Items]
Subordinated notes	1,917	2,058
Total medium- and long-term debt	2,945	4,091
4.80% subordinated notes due 2015 [Member] | Parent Company
Debt Instruments [Line Items]
Subordinated notes	321	330
Fixed Interest Rate	4.80%	4.80%
Maturity Date	May 01, 2015	May 01, 2015
3.00% notes due 2015 [Member] | Parent Company
Debt Instruments [Line Items]
Medium-term notes	299	299
Fixed Interest Rate	3.00%	3.00%
Maturity Date	Sep. 16, 2015	Sep. 16, 2015
7.375% subordinated notes due 2013 [Member] | Subsidiaries
Debt Instruments [Line Items]
Subordinated notes	0	51
Fixed Interest Rate	7.375%	7.375%
Maturity Date	Apr. 15, 2013	Apr. 15, 2013
5.70% subordinated notes due 2014 [Member] | Subsidiaries
Debt Instruments [Line Items]
Subordinated notes	258	267
Fixed Interest Rate	5.70%	5.70%
Maturity Date	Jun. 01, 2014	Jun. 01, 2014
5.75% subordinated notes due 2016 [Member] | Subsidiaries
Debt Instruments [Line Items]
Subordinated notes	684	694
Fixed Interest Rate	5.75%	5.75%
Maturity Date	Nov. 21, 2016	Nov. 21, 2016
5.20% subordinated notes due 2017 [Member] | Subsidiaries
Debt Instruments [Line Items]
Subordinated notes	571	593
Fixed Interest Rate	5.20%	5.20%
Maturity Date	Aug. 22, 2017	Aug. 22, 2017
Floating rate based on LIBOR index subordinated note due 2013 [Member] | Subsidiaries
Debt Instruments [Line Items]
Subordinated notes	0	26
Maturity Date	Sep. 15, 2013	Sep. 15, 2013
8.375% subordinated notes due 2024 [Member] | Subsidiaries
Debt Instruments [Line Items]
Subordinated notes	184	186
Fixed Interest Rate	8.375%	8.375%
Maturity Date	Jul. 15, 2024	Jul. 15, 2024
7.875% subordinated notes due 2026 [Member] | Subsidiaries
Debt Instruments [Line Items]
Subordinated notes	220	241
Fixed Interest Rate	7.875%	7.875%
Maturity Date	Sep. 15, 2026	Sep. 15, 2026
Federal Home Loan Bank advances floating-rate based on LIBOR indices due 2013 to 2014 [Member] | Subsidiaries
Debt Instruments [Line Items]
Federal Home Loan Bank advances	1,000	2,000
Maturity Date Range - start	May 07, 2013	May 07, 2013
Maturity Date Range - end	May 07, 2014	May 07, 2014
6.0% - 6.4% fixed-rate notes due 2020 [Member] | Subsidiaries
Debt Instruments [Line Items]
Other Notes	$ 28	$ 33
Floating Interest Rate - minimum	6.00%	6.00%
Floating Interest Rate - maximum	6.40%	6.40%
Maturity Date	Jun. 30, 2020	Jun. 30, 2020

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Derivative And Credit-Related Financial Instruments (Schedule Of Weighted Average Maturity And Interest Rates On Risk Management Interest Rate Swaps) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Notional Amount	$ 21,447	[1]	$ 21,781	[1]
Risk Management Purposes [Member]
Notional Amount	1,766	[1]	1,925	[1]
Swaps - Fair Value Hedge - Receive Fixed/Pay Floating [Member] | Risk Management Purposes [Member] | Interest Rate Swap [Member] | Medium- and Long-Term Debt Designation [Member]
Notional Amount	$ 1,450		$ 1,450
Weighted Average Remaining Maturity	3 years 8 months 12 days		4 years 4 months 24 days
Weighted Average Receive Rate	5.45%		5.45%
Weighted Average Pay Rate	0.42%	[2]	0.62%	[2]

[1] 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.

[2] Variable rates paid on receive fixed swaps are based on six-month LIBOR rates in effect at September 30, 2013 and December 31, 2012.

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Contingent Liabilities

9 Months Ended

Sep. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Contingent Liabilities

CONTINGENT LIABILITIES

Legal Proceedings

The Corporation and certain of its subsidiaries are subject to various 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 currently outstanding legal proceedings and, with respect to such legal proceedings, intends to continue to defend itself vigorously, litigating or settling cases according to management’s judgment as to what is in the best interests of the Corporation and its shareholders. Settlement may result from the Corporation's determination that it may be more prudent financially to settle, rather than litigate, and should not be regarded as an admission of liability. On at least a quarterly basis, the Corporation assesses its potential liabilities and contingencies in connection with outstanding legal proceedings utilizing the latest information available. On a case-by-case basis, reserves are established for those legal claims for which it is probable that a loss will be incurred either as a result of a settlement or judgment, and the amount of such loss can be reasonably estimated. The actual costs of resolving these claims may be substantially higher or lower than the amounts reserved. Litigation-related expenses, included in "other noninterest expenses" on the consolidated statements of comprehensive income, were a benefit of $4 million for the three months ended September 30, 2013, compared to expense of $4 million for the same period in 2012. There were no litigation-related expenses for the nine months ended September 30, 2013, compared to $23 million for the nine months ended September 30, 2012. Legal fees, also included in “other noninterest expenses” on the consolidated statements of comprehensive income, totaled $5 million and $8 million for the three-month periods ended September 30, 2013 and 2012, respectively, and $19 million and $26 million for the nine-month periods ended September 30, 2013 and 2012, respectively. Based on current knowledge, and after consultation with legal counsel, management believes that current reserves are adequate, and the amount of any incremental liability arising from these matters is not expected to have a material adverse effect on the Corporation’s consolidated financial condition, consolidated results of operations or consolidated cash flows.

For other matters, where a loss is not probable, the Corporation has not established legal reserves. In determining whether it is possible to provide an estimate of loss or range of possible loss, the Corporation reviews and evaluates its material litigation on an ongoing basis, in conjunction with legal counsel, in light of potentially relevant factual and legal developments. Based on current knowledge, expectation of future earnings, and after consultation with legal counsel, management believes the maximum amount of reasonably possible losses would not have a material adverse effect on the Corporation's consolidated financial condition, consolidated results of operations or consolidated cash flows.

 The damages alleged by plaintiffs or claimants may be overstated, unsubstantiated by legal theory, unsupported by the facts, and/or bear no relation to the ultimate award that a court, jury or agency might impose. In view of the inherent difficulty of predicting the outcome of such matters, the Corporation cannot state with confidence a range of reasonably possible losses, nor what the eventual outcome of these matters will be. However, based on current knowledge and after consultation with legal counsel, management believes the maximum amount of reasonably possible losses would not have a material adverse effect on the Corporation’s consolidated financial condition, consolidated results of operations or consolidated cash flows.

In the event of unexpected future developments, it is possible that the ultimate resolution of these matters, if unfavorable, may be material to the Corporation's consolidated financial condition, consolidated results of operations or consolidated cash flows.

For information regarding income tax contingencies, refer to Note 11.

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Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Sep. 30, 2013

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

ACCUMULATED OTHER COMPREHENSIVE INCOME (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 nine months ended September 30, 2013 and 2012, including the amount of income tax expense (benefit) allocated to each component of other comprehensive income (loss).

	Nine Months Ended September 30,
(in millions)	2013			2012
Accumulated net unrealized (losses) gains on investment securities available-for-sale:
Balance at beginning of period, net of tax	$	150		$	129
Net unrealized holding (losses) gains arising during the period	(270		)	123
Less: Provision (benefit) for income taxes	(100		)	44
Net unrealized holding (losses) gains arising during the period, net of tax	(170		)	79
Less:
Net realized gains included in net securities gains (losses)	1			12
Less: Provision for income taxes	—			4
Reclassification adjustment for net securities gains included in net income, net of tax	1			8
Change in net unrealized (losses) gains on investment securities available-for-sale, net of tax	(171		)	71
Balance at end of period, net of tax	$	(21	)	$	200
Accumulated defined benefit pension and other postretirement plans adjustment:
Balance at beginning of period, net of tax	$	(563	)	$	(485	)
Net defined benefit pension and other postretirement adjustment arising during the period, net of tax	—			—
Less:
Amortization of actuarial net loss	(65		)	(46		)
Amortization of prior service cost	(2		)	(2		)
Amortization of transition obligation	—			(3		)
Amounts recognized in employee benefits expense	(67		)	(51		)
Less: Benefit for income taxes	(24		)	(19		)
Adjustment for amounts recognized as components of net periodic benefit cost during the period, net of tax	(43		)	(32		)
Change in defined benefit pension and other postretirement plans adjustment, net of tax	43			32
Balance at end of period, net of tax	$	(520	)	$	(453	)
Total accumulated other comprehensive loss at end of period, net of tax	$	(541	)	$	(253	)

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Net Income Per Common Share (Basic And Diluted Net Income Per Common Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Net income	$ 147	$ 117	$ 424	$ 391
Income allocated to participating securities	2	1	6	4
Net income attributable to common shares	$ 145	$ 116	$ 418	$ 387
Basic average common shares	182	190	184	193
Basic net income per common share	$ 0.80	$ 0.61	$ 2.28	$ 2.00
Basic average common shares	182	190	184	193
Net effect of the assumed exercise of stock options	1	0	1	0
Net effect of the assumed exercise of warrants	4	1	2	1
Diluted average common shares	187	191	187	194
Diluted net income per common share	$ 0.78	$ 0.61	$ 2.23	$ 2.00

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Derivative And Credit-Related Financial Instruments Derivative And Credit-Related Financial Instruments (Policies)

9 Months Ended

Sep. 30, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives, Offsetting Fair Value Amounts, Policy [Policy Text Block]

The Corporation presents derivative instruments at fair value in the consolidated balance sheets on a net basis when a right of offset exists, based on transactions with a single counterparty and any cash collateral paid to and/or received from that counterparty for derivative contracts that are subject to legally enforceable master netting arrangements.

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Business Segment Information

9 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

Business Segment Information

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. These methodologies may be modified as the management accounting system is enhanced and changes occur in the organizational structure and/or product lines.

In the first quarter 2013, the Corporation changed the method of assigning the allowance for loan losses to each business segment. In 2012, national probability of default and loss given default statistics were incorporated into the Corporation's allowance methodology. Each business segment was assigned an allowance for loan losses based on market-specific standard reserve factors applied to the loans in each segment, and the difference between the total allowance required on a national basis and the market-specific allowances was allocated based on the relative loan balances in each segment. Effective first quarter 2013, each segment is assigned an allowance for loan losses by applying national standard reserve factors to the loan balances in each segment by risk rating distribution. For comparability purposes, amounts in all periods are based on business segments and methodologies in effect at September 30, 2013. Also in the first quarter 2013, the Corporation changed the method of allocating to the segments certain noninterest income and expense associated with commercial charge cards. The change did not have a material impact on segment operating results.

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 middle market businesses, multinational corporations and governmental entities by offering various products and services, including commercial loans and lines of credit, deposits, cash management, capital market products, international trade finance, letters of credit, foreign exchange management services and loan syndication services.

The Retail Bank includes small business banking and personal financial services, consisting of consumer lending, consumer deposit gathering and mortgage loan origination. In addition to a full range of financial services provided to small business customers, this business segment offers a variety of consumer products, including deposit accounts, installment loans, credit cards, student loans, home equity lines of credit and residential mortgage loans.

Wealth Management offers products and services consisting of fiduciary services, private banking, retirement services, investment management and advisory services, investment banking and brokerage services. This business segment also offers the sale of annuity products, as well as life, disability and long-term care insurance products.

The Finance segment includes the Corporation’s securities portfolio and asset and liability management activities. This segment is responsible for managing the Corporation’s funding, liquidity and capital needs, performing interest sensitivity analysis and executing various strategies to manage the Corporation’s exposure to liquidity, interest rate risk and foreign exchange risk.

The Other category includes discontinued operations, 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 Note 22 to the consolidated financial statements in the Corporation's 2012 Annual Report.

Business segment financial results are as follows:

(dollar amounts in millions)	Business Bank			Retail Bank			Wealth Management			Finance			Other			Total
Nine Months Ended September 30, 2013
Earnings summary:
Net interest income (expense) (FTE)	$	1,115		$	460		$	138		$	(492	)	$	23		$	1,244
Provision for credit losses	29			21			(8		)	—			(5		)	37
Noninterest income	246			132			191			47			6			622
Noninterest expenses	446			530			238			7			28			1,249
Provision (benefit) for income taxes (FTE)	271			14			35			(168		)	4			156
Net income (loss)	$	615		$	27		$	64		$	(284	)	$	2		$	424
Net credit-related charge-offs	$	37		$	18		$	5		$	—		$	—		$	60
Selected average balances:
Assets	$	35,697		$	5,967		$	4,785		$	11,553		$	5,708		$	63,710
Loans	34,626			5,278			4,629			—			—			44,533
Deposits	25,931			21,183			3,722			309			210			51,355
Statistical data:
Return on average assets (a)	2.30		%	0.17		%	1.78		%	N/M			N/M			0.89		%
Efficiency ratio (b)	32.74			89.19			72.64			N/M			N/M			66.89

(dollar amounts in millions)	Business Bank			Retail Bank			Wealth Management			Finance			Other			Total
Nine Months Ended September 30, 2012
Earnings summary:
Net interest income (expense) (FTE)	$	1,131		$	491		$	140		$	(483	)	$	27		$	1,306
Provision for credit losses	28			16			18			—			1			63
Noninterest income	240			131			193			44			6			614
Noninterest expenses	453			543			236			8			90			1,330
Provision (benefit) for income taxes (FTE)	273			21			28			(167		)	(19		)	136
Net income (loss)	$	617		$	42		$	51		$	(280	)	$	(39	)	$	391
Net credit-related charge-offs	$	81		$	34		$	18		$	—		$	—		$	133
Selected average balances:
Assets	$	34,140		$	6,027		$	4,602		$	11,796		$	5,443		$	62,008
Loans	33,183			5,326			4,525			—			—			43,034
Deposits	24,430			20,527			3,640			171			179			48,947
Statistical data:
Return on average assets (a)	2.41		%	0.26		%	1.49		%	N/M			N/M			0.84		%
Efficiency ratio (b)	33.08			87.14			73.30			N/M			N/M			69.62

(a) Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

(b)    Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains.

FTE – Fully Taxable Equivalent

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 September 30, 2013.

A discussion of the financial results and the factors impacting performance can be found in the section entitled "Market Segments" in the financial review.

Market segment financial results are as follows:

(dollar amounts in millions)	Michigan			California			Texas			Other Markets			Finance & Other			Total
Nine Months Ended September 30, 2013
Earnings summary:
Net interest income (expense) (FTE)	$	564		$	516		$	394		$	239		$	(469	)	$	1,244
Provision for credit losses	(19		)	25			31			5			(5		)	37
Noninterest income	268			113			100			88			53			622
Noninterest expenses	496			298			272			148			35			1,249
Provision (benefit) for income taxes (FTE)	126			114			67			13			(164		)	156
Net income (loss)	$	229		$	192		$	124		$	161		$	(282	)	$	424
Net credit-related charge-offs	$	10		$	30		$	7		$	13		$	—		$	60
Selected average balances:
Assets	$	13,936		$	14,067		$	10,774		$	7,672		$	17,261		$	63,710
Loans	13,508			13,820			10,064			7,141			—			44,533
Deposits	20,294			14,532			10,149			5,861			519			51,355
Statistical data:
Return on average assets (a)	1.44		%	1.65		%	1.46		%	2.79		%	N/M			0.89		%
Efficiency ratio (b)	59.52			47.38			54.96			45.30			N/M			66.89

(dollar amounts in millions)	Michigan			California			Texas			Other Markets			Finance & Other			Total
Nine Months Ended September 30, 2012
Earnings summary:
Net interest income (expense) (FTE)	$	585		$	514		$	429		$	234		$	(456	)	$	1,306
Provision for credit losses	(7		)	9			43			17			1			63
Noninterest income	289			101			93			81			50			614
Noninterest expenses	527			294			271			140			98			1,330
Provision (benefit) for income taxes (FTE)	123			115			73			11			(186		)	136
Net income (loss)	$	231		$	197		$	135		$	147		$	(319	)	$	391
Net credit-related charge-offs	$	40		$	34		$	17		$	42		$	—		$	133
Selected average balances:
Assets	$	13,968		$	12,786		$	10,224		$	7,791		$	17,239		$	62,008
Loans	13,687			12,555			9,462			7,330			—			43,034
Deposits	19,423			14,270			10,118			4,786			350			48,947
Statistical data:
Return on average assets (a)	1.51		%	1.72		%	1.58		%	2.51		%	N/M			0.84		%
Efficiency ratio (b)	60.29			47.86			51.78			46.05			N/M			69.62

(a) Return on average assets is calculated based on the greater of average assets or average liabilities and attributed equity.

(b)    Noninterest expenses as a percentage of the sum of net interest income (FTE) and noninterest income excluding net securities gains.

FTE – Fully Taxable Equivalent

N/M – not meaningful

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Document And Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 24, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Document Period End Date	Sep. 30, 2013
Amendment Flag	false
Entity Registrant Name	Comerica INC /NEW/
Entity Central Index Key	0000028412
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q3
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		182,910,689
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

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Basis of Presentation and Accounting Policies Basis of Presentation and Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2013

Accounting Policies [Abstract]

Allowance for Loan Losses [Policy Text Block]

Allowance for Loan Losses

The allowance for loan losses represents management’s assessment of probable, estimable losses inherent in the Corporation’s loan portfolio. The allowance for loan losses includes specific allowances, based on individual evaluations of certain loans, and allowances for homogeneous pools of loans with similar risk characteristics.

The allowance for business loans which do not meet the criteria to be evaluated individually is determined by applying standard reserve factors to the pool of business loans within each internal risk rating. In the first quarter 2013, the Corporation enhanced the approach utilized for determining standard reserve factors by changing from a dollar-based migration method for developing probability of default statistics to a count-based method. Under the dollar-based method, each dollar that moved to default received equal weight in the determination of standard reserve factors for each internal risk rating. As a result, the movement of larger loans impacted standard reserve factors more than the movement of smaller loans. By moving to a count-based approach, where each loan that moves to default receives equal weighting, unusually large or small loans will not have a disproportionate influence on the standard reserve factors. The change resulted in a $40 million increase to the allowance for loan losses at March 31, 2013.

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Derivative And Credit-Related Financial Instruments (Schedule Of Financial Instruments With Off-Balance Sheet Credit Risk) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Unused Commitments to Extend Credit [Member]
Loss contingency, range of possible loss, maximum	$ 29,799	$ 27,340
Commercial And Other [Member] | Unused Commitments to Extend Credit [Member]
Loss contingency, range of possible loss, maximum	27,975	25,659
Bankcard, Revolving Check Credit And Home Equity Loan Commitments [Member] | Unused Commitments to Extend Credit [Member]
Loss contingency, range of possible loss, maximum	1,824	1,681
Standby Letters Of Credit [Member]
Loss contingency, range of possible loss, maximum	4,484	4,985
Commercial Letters Of Credit [Member]
Loss contingency, range of possible loss, maximum	96	78
Other Credit-Related Financial Instruments [Member]
Loss contingency, estimate of possible loss	$ 2	$ 1

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Derivative And Credit-Related Financial Instruments (Schedule Of Net Gains Recognized In Income On Customer-Initiated Derivatives) (Details) (Not Designated as Hedging Instrument [Member], Customer-Initiated And Other Activities [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net derivative gain recognized in income	$ 16	$ 14	$ 45	$ 43
Interest Rate Contracts [Member] | Other Noninterest Income [Member]
Net derivative gain recognized in income	8	5	17	14
Energy Contracts [Member] | Other Noninterest Income [Member]
Net derivative gain recognized in income	0	1	2	3
Foreign Exchange Contracts [Member] | Foreign Exchange Income [Member]
Net derivative gain recognized in income	$ 8	$ 8	$ 26	$ 26