KeyCorp (KEY) 10-Q 2 Nov 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Oct. 29, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Trading Symbol	KEY
Entity Registrant Name	KEYCORP /NEW/
Entity Central Index Key	91,576
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		835,366,925

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)		Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
ASSETS
Cash and due from banks		$ 470,000,000	$ 653,000,000	$ 651,000,000
Short-term investments		1,964,000,000	4,269,000,000	2,342,000,000
Trading account assets		811,000,000	750,000,000	965,000,000
Securities available for sale		14,376,000,000	13,360,000,000	12,245,000,000
Held-to-maturity securities (fair value: $4,940, $4,974, and $4,911)		4,936,000,000	5,015,000,000	4,997,000,000
Other investments		691,000,000	760,000,000	822,000,000
Loans, net of unearned income of $645, $682, and $685		60,085,000,000	57,381,000,000	56,155,000,000
Less: Allowance for loan and lease losses		790,000,000	794,000,000	804,000,000
Net loans		59,295,000,000	56,587,000,000	55,351,000,000
Loans held for sale		916,000,000	734,000,000	784,000,000
Premises and equipment		771,000,000	841,000,000	832,000,000
Operating lease assets		315,000,000	330,000,000	304,000,000
Goodwill		1,060,000,000	1,057,000,000	1,051,000,000
Other intangible assets		74,000,000	101,000,000	126,000,000
Corporate-owned life insurance		3,516,000,000	3,479,000,000	3,456,000,000
Derivative assets		793,000,000	609,000,000	413,000,000
Accrued income and other assets (including $1, $1, and $1 of consolidated LIHTC guaranteed funds VIEs, see Note 9) (a)	[1]	3,348,000,000	2,952,000,000	3,024,000,000
Discontinued assets (including $169 of portfolio loans held for sale at fair value and $191 and $201 of portfolio loans at fair value, see Note 11)		2,086,000,000	2,324,000,000	2,421,000,000
Total assets		95,422,000,000	93,821,000,000	89,784,000,000
Deposits in domestic offices:
NOW and money market deposit accounts		37,301,000,000	34,536,000,000	33,941,000,000
Savings deposits		2,338,000,000	2,371,000,000	2,390,000,000
Certificates of deposit ($100,000 or more)		2,001,000,000	2,040,000,000	2,533,000,000
Other time deposits		3,020,000,000	3,259,000,000	3,338,000,000
Total interest-bearing deposits		44,660,000,000	42,206,000,000	42,202,000,000
Noninterest-bearing deposits		25,985,000,000	29,228,000,000	25,697,000,000
Deposits in foreign office - interest-bearing		428,000,000	564,000,000	557,000,000
Total deposits		71,073,000,000	71,998,000,000	68,456,000,000
Federal funds purchased and securities sold under repurchase agreements		407,000,000	575,000,000	657,000,000
Bank notes and other short-term borrowings		677,000,000	423,000,000	996,000,000
Derivative liabilities		676,000,000	784,000,000	384,000,000
Accrued expense and other liabilities (including $1, $1, and $2 of consolidated LIHTC guaranteed funds VIEs, see Note 9) (a)		1,562,000,000	1,621,000,000	1,613,000,000
Long-term debt		10,310,000,000	7,875,000,000	7,172,000,000
Discontinued liabilities		0	3,000,000	3,000,000
Total liabilities		84,705,000,000	83,279,000,000	79,281,000,000
EQUITY
Common shares, $1 par value; authorized 1,400,000,000 shares; issued 1,016,969,905, 1,016,969,905, and 1,016,969,905 shares		1,017,000,000	1,017,000,000	1,017,000,000
Capital surplus		3,914,000,000	3,986,000,000	3,984,000,000
Retained earnings		8,764,000,000	8,273,000,000	8,082,000,000
Treasury stock, at cost (181,685,035, 157,566,493, and 148,492,881 shares)		(3,008,000,000)	(2,681,000,000)	(2,563,000,000)
Accumulated other comprehensive income (loss)		(272,000,000)	(356,000,000)	(325,000,000)
Key shareholders' equity		10,705,000,000	10,530,000,000	10,486,000,000
Noncontrolling interests		12,000,000	12,000,000	17,000,000
Total equity		10,717,000,000	10,542,000,000	10,503,000,000
Total liabilities and equity		95,422,000,000	93,821,000,000	89,784,000,000
Series A Preferred Stock [Member]
EQUITY
Preferred stock, $1 par value, authorized 25,000,000 shares: 7.75% Noncumulative Perpetual Convertible Preferred Stock, Series A, $100 liquidation preference; authorized 7,475,000 shares; issued 2,900,234, 2,904,839, and 2,904,839 shares		$ 290,000,000	$ 291,000,000	$ 291,000,000
[1]	The assets of the VIEs can only be used by the particular VIE, and there is no recourse to Key with respect to the liabilities of the consolidated LIHTC VIEs.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Held-to-maturity securities, fair value	$ 4,940	$ 4,974	$ 4,911
Unearned income on loans	645	682	685
Consolidated guaranteed funds VIEs, for accrued income and other assets	1	1	1
Loan securitization trust VIEs		191	201
Loan securitization trust VIEs, fair value	169
Aggregate amount of certificates of deposit, denominations	100,000	100,000	100,000
Consolidated guaranteed funds VIEs, for accrued expenses and other liabilities	$ 1	$ 1	$ 2
Preferred stock, par value	$ 1	$ 1	$ 1
Preferred stock, shares authorized	25,000,000	25,000,000	25,000,000
Common shares, par value	$ 1	$ 1	$ 1
Common shares, shares authorized	1,400,000,000	1,400,000,000	1,400,000,000
Common shares, shares issued	1,016,969,905	1,016,969,905	1,016,969,905
Treasury stock, shares	181,685,035	157,566,493	148,492,881
Series A Preferred Stock [Member]
Preferred stock, liquidation preference	$ 100	$ 100	$ 100
Preferred stock, shares authorized	7,475,000	7,475,000	7,475,000
Preferred stock, shares issued, Total	2,900,234	2,904,839	2,904,839
Preferred stock, dividend rate	7.75%	7.75%	7.75%

Consolidated Statements of Inco

Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
INTEREST INCOME
Loans		$ 542	$ 531	$ 1,597	$ 1,576
Loans held for sale		10	4	29	13
Securities available for sale		75	67	217	210
Held-to-maturity securities		24	25	72	70
Trading account assets		5	6	15	19
Short-term investments		1	2	5	4
Other investments		4	4	14	16
Total interest income		661	639	1,949	1,908
INTEREST EXPENSE
Deposits		27	28	79	91
Federal funds purchased and securities sold under repurchase agreements			1		2
Bank notes and other short-term borrowings		2	2	6	6
Long-term debt		41	33	118	98
Total interest expense		70	64	203	197
NET INTEREST INCOME		591	575	1,746	1,711
Provision for credit losses		45	19	121	35
Net interest income after provision for credit losses		546	556	1,625	1,676
NONINTEREST INCOME
Trust and investment services income		108	99	328	291
Investment banking and debt placement fees		109	88	318	271
Service charges on deposit accounts		68	68	192	197
Operating lease income and other leasing gains		15	17	58	81
Corporate services income		57	42	143	125
Cards and payments income		47	42	136	123
Corporate-owned life insurance income		30	26	91	80
Consumer mortgage income		3	3	10	7
Mortgage servicing fees		11	9	33	35
Net gains (losses) from principal investing		11	9	51	60
Other income	[1]	11	14	35	37
Total noninterest income		470	417	1,395	1,307
NONINTEREST EXPENSE
Personnel		426	405	1,223	1,182
Net occupancy		60	66	191	198
Computer processing		41	39	121	118
Business services and professional fees		40	36	115	118
Equipment		22	25	66	73
Operating lease expense		11	11	34	31
Marketing		17	15	40	33
FDIC assessment		8	9	24	21
Intangible asset amortization		9	10	27	29
OREO expense, net		2	1	5	3
Other expense		88	89	258	251
Total noninterest expense		724	706	2,104	2,057
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		292	267	916	926
Income taxes		72	64	230	232
Income (loss) from continuing operations		220	203	686	694
Income (loss) from discontinued operations, net of taxes of ($2), ($10), $3, and ($24) (see Note 11)		(3)	(17)	5	(41)
NET INCOME (LOSS)		217	186	691	653
Less: Net income (loss) attributable to noncontrolling interests		(2)		1	6
NET INCOME (LOSS) ATTRIBUTABLE TO KEY		219	186	690	647
Income (loss) from continuing operations attributable to Key common shareholders		216	197	668	671
Net income (loss) attributable to Key common shareholders		$ 213	$ 180	$ 673	$ 630
Per common share:
Income (loss) from continuing operations attributable to Key common shareholders		$ 0.26	$ 0.23	$ 0.79	$ 0.77
Income (loss) from discontinued operations, net of taxes			(0.02)	0.01	(0.05)
Net income (loss) attributable to Key common shareholders	[2]	0.26	0.21	0.80	0.72
Per common share - assuming dilution:
Income (loss) from continuing operations attributable to Key common shareholders		0.26	0.23	0.78	0.76
Income (loss) from discontinued operations, net of taxes			(0.02)	0.01	(0.05)
Net income (loss) attributable to Key common shareholders	[2]	0.25	0.21	0.79	0.71
Cash dividends declared per common share		$ 0.075	$ 0.065	$ 0.215	$ 0.185
Weighted-average common shares outstanding (000)		831,430	867,350	839,758	875,728
Effect of convertible preferred stock		0	0	0	0
Effect of common share options and other stock awards		7,450	6,772	7,613	6,723
Weighted-average common shares and potential common shares outstanding (000)	[3]	838,880	874,122	847,371	882,451
[1]	For each of the three months ended September 30, 2015, and September 30, 2014, net securities gains (losses) totaled less than $1 million. For the three months ended September 30, 2015, and September 30, 2014, we did not have any impairment losses related to securities.
[2]	EPS may not foot due to rounding.
[3]	Assumes conversion of common share options and other stock awards and/or convertible preferred stock, as applicable.

Consolidated Statements of Inc5

Consolidated Statements of Income (Unaudited) (Parenthetical) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net tax effect on income (loss) from discontinued operations	$ (2,000,000)	$ (10,000,000)	$ 3,000,000	$ (24,000,000)
Net securities gains (losses)	(1,000,000)	1,000,000	$ (1,000,000)
Impairment losses related to securities	$ 0	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 217	$ 186	$ 691	$ 653
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale, net of income taxes of $33, ($20), $35, and $14	54	(33)	58	24
Net unrealized gains (losses) on derivative financial instruments, net of income taxes of $28, ($6), $37, and ($3)	48	(8)	63	(4)
Foreign currency translation adjustments, net of income taxes of ($3), ($3), ($11), and ($3)	(5)	(9)	(18)	(12)
Net pension and postretirement benefit costs, net of income taxes of ($15), $10, ($12), and $13	(24)	14	(19)	19
Total other comprehensive income (loss), net of tax	73	(36)	84	27
Comprehensive income (loss)	290	150	775	680
Less: Comprehensive income attributable to noncontrolling interests	(2)		1	6
Comprehensive income (loss) attributable to Key	$ 292	$ 150	$ 774	$ 674

Consolidated Statements of Com7

Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Income taxes effect on net unrealized (losses) gains on securities available for sale	$ 33	$ (20)	$ 35	$ 14
Income taxes effect on net unrealized (losses) gains on derivative financial instruments	28	(6)	37	(3)
Income taxes effect on foreign currency translation adjustments	(3)	(3)	(11)	(3)
Income taxes effect on net pension and postretirement benefit costs	$ (15)	$ 10	$ (12)	$ 13

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity (Unaudited) - USD ($) shares in Thousands, $ in Millions	Total	Preferred Stock [Member]	Common Shares [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock, at Cost [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Series A Preferred Stock [Member]Preferred Stock [Member]	Series A Preferred Stock [Member]Common Shares [Member]	Series A Preferred Stock [Member]Retained Earnings [Member]	Series A Preferred Stock [Member]Treasury Stock, at Cost [Member]
Beginning Balance at Dec. 31, 2013		$ 291	$ 1,017	$ 4,022	$ 7,606	$ (2,281)	$ (352)	$ 17
Beginning Balance, Preferred Shares at Dec. 31, 2013		2,905
Beginning Balance, Common Shares at Dec. 31, 2013			890,724
Net income (loss)	$ 653				647			6
Other comprehensive income (loss):
Net unrealized gains (losses) on securities available for sale, net of income taxes	24						24
Net unrealized gains (losses) on derivative financial instruments, net of income taxes	(4)						(4)
Foreign currency translation adjustments, net of income taxes	(12)						(12)
Net pension and postretirement benefit costs, net of income taxes	19						19
Cash dividends declared on common shares					(161)
Cash dividends declared on Noncumulative Series A Preferred Stock											$ (17)
Common shares repurchased, value						(355)
Common shares repurchased, shares			(26,499)
Common shares reissued (returned) for stock options and other employee benefit plans				(38)		73
Common shares reissued (returned) for stock options and other employee benefit plans, shares			4,252
LIHTC guaranteed funds put					7
Net contribution from (distribution to) noncontrolling interests								(6)
Ending Balance at Sep. 30, 2014	10,503	$ 291	$ 1,017	3,984	8,082	(2,563)	(325)	17
Ending Balance, Preferred Shares at Sep. 30, 2014		2,905
Ending Balance, Common Shares at Sep. 30, 2014			868,477
Beginning Balance at Dec. 31, 2014	10,542	$ 291	$ 1,017	3,986	8,273	(2,681)	(356)	12
Beginning Balance, Preferred Shares at Dec. 31, 2014		2,905
Beginning Balance, Common Shares at Dec. 31, 2014			859,403
Net income (loss)	691				690			1
Other comprehensive income (loss):
Net unrealized gains (losses) on securities available for sale, net of income taxes	58						58
Net unrealized gains (losses) on derivative financial instruments, net of income taxes	63						63
Foreign currency translation adjustments, net of income taxes	(18)						(18)
Net pension and postretirement benefit costs, net of income taxes	(19)						(19)
Deferred compensation				13
Cash dividends declared on common shares					(182)
Cash dividends declared on Noncumulative Series A Preferred Stock											$ (17)
Common shares repurchased, value						(448)
Common shares repurchased, shares			(31,267)
Series A Preferred Stock exchanged for common shares									$ (1)			$ 1
Series A Preferred Stock exchanged for common shares, shares									(5)	33
Common shares reissued (returned) for stock options and other employee benefit plans				(85)		120
Common shares reissued (returned) for stock options and other employee benefit plans, shares			7,116
Net contribution from (distribution to) noncontrolling interests								(1)
Ending Balance at Sep. 30, 2015	$ 10,717	$ 290	$ 1,017	$ 3,914	$ 8,764	$ (3,008)	$ (272)	$ 12
Ending Balance, Preferred Shares at Sep. 30, 2015		2,900
Ending Balance, Common Shares at Sep. 30, 2015			835,285

Consolidated Statements of Cha9

Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Income taxes effect on net unrealized (losses) gains on securities available for sale	$ 35	$ 14
Income taxes effect on net unrealized gains (losses) on derivative financial instruments	37	(3)
Income taxes effect on foreign currency translation adjustments	(11)	(3)
Income taxes effect on net pension and postretirement benefit costs	$ (12)	$ 13
Cash dividends declared on common shares, per share	$ 0.215	$ 0.185
Retained Earnings [Member]
Cash dividends declared on common shares, per share	$ 0.215	$ 0.185
Accumulated Other Comprehensive Income (Loss) [Member]
Income taxes effect on net unrealized (losses) gains on securities available for sale	$ 35	$ 14
Income taxes effect on net unrealized gains (losses) on derivative financial instruments	37	(3)
Income taxes effect on foreign currency translation adjustments	(11)	(3)
Income taxes effect on net pension and postretirement benefit costs	$ (12)	$ 13
Series A Preferred Stock [Member] | Retained Earnings [Member]
Cash dividends declared on Preferred Stock, per share	$ 5.8125	$ 5.8125

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
OPERATING ACTIVITIES
Net income (loss)	$ 691	$ 653
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Provision for credit losses	121	35
Provision (credit) for losses on LIHTC guaranteed funds		(6)
Depreciation, amortization and accretion expense, net	176	185
Increase in cash surrender value of corporate-owned life insurance	(75)	(73)
Stock-based compensation expense	47	31
FDIC reimbursement (payments), net of FDIC expense	(1)	1
Deferred income taxes (benefit)	(70)	(29)
Proceeds from sales of loans held for sale	5,362	2,832
Originations of loans held for sale, net of repayments	(5,428)	(2,951)
Net losses (gains) on sales of loans held for sale	(75)	(59)
Net losses (gains) from principal investing	(51)	(60)
Net losses (gains) and writedown on OREO	2	3
Net losses (gains) on leased equipment	(8)	(35)
Net securities losses (gains)	1
Net losses (gains) on sales of fixed assets	6	5
Gain on sale of Victory		(10)
Loss on sale of residual interests and deconsolidation of securitization trusts		40
Net decrease (increase) in trading account assets	(61)	(227)
Other operating activities, net	(388)	130
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	249	465
INVESTING ACTIVITIES
Cash received (used) in acquisitions, net of cash acquired		(113)
Proceeds from sale of residual interests		57
Proceeds from sale of Victory		10
Net decrease (increase) in short-term investments, excluding acquisitions	2,305	3,285
Purchases of securities available for sale	(3,314)	(1,993)
Proceeds from sales of securities available for sale	11
Proceeds from prepayments and maturities of securities available for sale	2,357	2,123
Proceeds from prepayments and maturities of held-to-maturity securities	846	628
Purchases of held-to-maturity securities	(770)	(869)
Purchases of other investments	(24)	(42)
Proceeds from sales of other investments	107	266
Proceeds from prepayments and maturities of other investments	2	3
Net decrease (increase) in loans, excluding acquisitions, sales and transfers	(3,061)	(1,936)
Proceeds from sales of portfolio loans	89	91
Proceeds from corporate-owned life insurance	38	24
Purchases of premises, equipment, and software	(40)	(53)
Proceeds from sales of premises and equipment	1	1
Proceeds from sales of OREO	16	13
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(1,437)	1,495
FINANCING ACTIVITIES
Net increase (decrease) in deposits, excluding acquisitions	(925)	(806)
Net increase (decrease) in short-term borrowings	86	(224)
Net proceeds from issuance of long-term debt	4,054	648
Payments on long-term debt	(1,582)	(1,034)
Repurchase of common shares	(448)	(355)
Net proceeds from reissuance of common shares	19	23
Cash dividends paid	(199)	(178)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	1,005	(1,926)
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	(183)	34
CASH AND DUE FROM BANKS AT BEGINNING OF PERIOD	653	617
CASH AND DUE FROM BANKS AT END OF PERIOD	470	651
Additional disclosures relative to cash flows:
Interest paid	221	250
Income taxes paid (refunded)	173	109
Noncash items:
Reduction of secured borrowing and related collateral	132	78
Loans transferred to portfolio from held for sale	1	10
Loans transferred to held for sale from portfolio	41	5
Loans transferred to OREO	$ 16	16
LIHTC guaranteed funds put		7
Assets acquired		35
Liabilities assumed		$ 22

Basis of Presentation and Accou

Basis of Presentation and Accounting Policies	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Basis of Presentation and Accounting Policies	1. Basis of Presentation and Accounting Policies As used in these Notes, references to “Key,” “we,” “our,” “us,” and similar terms refer to the consolidated entity consisting of KeyCorp and its subsidiaries. KeyCorp refers solely to the parent holding company, and KeyBank refers to KeyCorp’s subsidiary, KeyBank National Association. The acronyms and abbreviations identified below are used in the Notes to Consolidated Financial Statements (Unaudited) as well as in the Management’s Discussion & Analysis of Financial Condition & Results of Operations. You may find it helpful to refer back to this page as you read this report. References to our “2014 Form 10-K” refer to our Form 10-K for the year ended December 31, 2014, which was filed with the U.S. Securities and Exchange Commission and is available on its website ( www.sec.gov www.key.com/ir AICPA: American Institute of Certified Public Accountants. KREEC: Key Real Estate Equity Capital, Inc. ALCO: Asset/Liability Management Committee. LCR: Liquidity coverage ratio. ALLL: Allowance for loan and lease losses. LIBOR: London Interbank Offered Rate. A/LM: Asset/liability management. LIHTC: Low-income housing tax credit. AOCI: Accumulated other comprehensive income (loss). Moody’s: Moody’s Investor Services, Inc. APBO: Accumulated postretirement benefit obligation. MRM: Market Risk Management group. Austin: Austin Capital Management, Ltd. N/A: Not applicable. BHCs: Bank holding companies. NASDAQ: The NASDAQ Stock Market LLC. Board: KeyCorp Board of Directors. N/M: Not meaningful. CCAR: Comprehensive Capital Analysis and Review. NOW: Negotiable Order of Withdrawal. CMBS: Commercial mortgage-backed securities. NYSE: New York Stock Exchange. CMO: Collateralized mortgage obligation. OCC: Office of the Comptroller of the Currency. Common shares: KeyCorp common shares, $1 par value. OCI: Other comprehensive income (loss). Dodd-Frank Act: Dodd-Frank Wall Street Reform and OREO: Other real estate owned. Consumer Protection Act of 2010. OTTI: Other-than-temporary impairment. EBITDA: Earnings before interest, taxes, depreciation, and PBO: Projected benefit obligation. amortization. PCI: Purchased credit impaired. EPS: Earnings per share. S&P: Standard and Poor’s Ratings Services, a Division of The ERM: Enterprise risk management. McGraw-Hill Companies, Inc. EVE: Economic value of equity. SEC: U.S. Securities and Exchange Commission. FASB: Financial Accounting Standards Board. Series A Preferred Stock: KeyCorp’s 7.750% Noncumulative FDIC: Federal Deposit Insurance Corporation. Perpetual Convertible Preferred Stock, Series A. Federal Reserve: Board of Governors of the Federal Reserve SIFIs: Systemically important financial institutions, including System. BHCs with total consolidated assets of at least $50 billion FHLB: Federal Home Loan Bank of Cincinnati. and nonbank financial companies designated by FSOC for FHLMC: Federal Home Loan Mortgage Corporation. supervision by the Federal Reserve. FNMA: Federal National Mortgage Association, or Fannie Mae. TDR: Troubled debt restructuring. FSOC: Financial Stability Oversight Council. TE: Taxable-equivalent. GAAP: U.S. generally accepted accounting principles. U.S. Treasury: United States Department of the Treasury. GNMA: Government National Mortgage Association. VaR: Value at risk. ISDA: International Swaps and Derivatives Association. VEBA: Voluntary Employee Beneficiary Association. KAHC: Key Affordable Housing Corporation. Victory: Victory Capital Management and/or KBCM: KeyBanc Capital Markets, Inc. Victory Capital Advisors. KCDC: Key Community Development Corporation. VIE: Variable interest entity. KEF: Key Equipment Finance. The consolidated financial statements include the accounts of KeyCorp and its subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. Some previously reported amounts have been reclassified to conform to current reporting practices. The consolidated financial statements include any voting rights entities in which we have a controlling financial interest. In accordance with the applicable accounting guidance for consolidations, we consolidate a VIE if we have: (i) a variable interest in the entity; (ii) the power to direct activities of the VIE that most significantly impact the entity’s economic performance; and (iii) the obligation to absorb losses of the entity or the right to receive benefits from the entity that could potentially be significant to the VIE (i.e., we are considered to be the primary beneficiary). Variable interests can include equity interests, subordinated debt, derivative contracts, leases, service agreements, guarantees, standby letters of credit, loan commitments, and other contracts, agreements, and financial instruments. See Note 9 (“Variable Interest Entities”) for information on our involvement with VIEs. We use the equity method to account for unconsolidated investments in voting rights entities or VIEs if we have significant influence over the entity’s operating and financing decisions (usually defined as a voting or economic interest of 20% to 50%, but not controlling). Unconsolidated investments in voting rights entities or VIEs in which we have a voting or economic interest of less than 20% generally are carried at cost. Investments held by our registered broker-dealer and investment company subsidiaries (principal investing entities and Real Estate Capital line of business) are carried at fair value. We believe that the unaudited consolidated interim financial statements reflect all adjustments of a normal recurring nature and disclosures that are necessary for a fair presentation of the results for the interim periods presented. The results of operations for the interim period are not necessarily indicative of the results of operations to be expected for the full year. The interim financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our 2014 Form 10-K. In preparing these financial statements, subsequent events were evaluated through the time the financial statements were issued. Financial statements are considered issued when they are widely distributed to all shareholders and other financial statement users, or filed with the SEC. Offsetting Derivative Positions In accordance with the applicable accounting guidance, we take into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts held with a single counterparty on a net basis, and to offset the net derivative position with the related cash collateral when recognizing derivative assets and liabilities. Additional information regarding derivative offsetting is provided in Note 7 (“Derivatives and Hedging Activities”). Allowance for Loan and Lease Losses In the third quarter of 2015, we enhanced the approach used to determine the commercial reserve factors used in estimating the commercial ALLL, which had the effect of capturing certain elements in the commercial quantitative reserve component that had formerly been included in the commercial qualitative component. Under the enhanced methodology, we began utilizing more refined commercial estimated loss rates that represent cumulative losses over the estimated average time period from the onset of credit deterioration to the initial loss recorded for an individual loan. In addition, we began utilizing an enhanced framework to quantify commercial ALLL adjustments resulting from qualitative factors that may not be fully captured within the statistical analysis of incurred loss. The impact of these changes was largely neutral to the total ALLL at September 30, 2015. However, because the quantitative reserve is allocated to the business segments at a loan level, while the qualitative portion is allocated at the portfolio level, the impact of the methodology enhancements on the allowance for each business segment and each portfolio caused the business segment and commercial portfolio reserves to increase or decrease accordingly. The impact of the increases and decreases on the business segment and commercial portfolio reserves was not significant. Accounting Guidance Adopted in 2015 Troubled debt restructurings. Transfers and servicing of financial assets. Discontinued operations. Investments in qualified affordable housing projects. Troubled debt restructurings. Accounting Guidance Pending Adoption at September 30, 2015 Business combinations. Fair value measurement. Cloud computing fees. Imputation of interest. Consolidation. Derivatives and hedging. Going concern. Consolidation. Stock-based compensation. Revenue recognition.

Earnings Per Common Share

Earnings Per Common Share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Earnings Per Common Share	2. Earnings Per Common Share Basic earnings per share is the amount of earnings (adjusted for dividends declared on our preferred stock) available to each common share outstanding during the reporting periods. Diluted earnings per share is the amount of earnings available to each common share outstanding during the reporting periods adjusted to include the effects of potentially dilutive common shares. Potentially dilutive common shares include incremental shares issued for the conversion of our convertible Series A Preferred Stock, stock options, and other stock-based awards. Potentially dilutive common shares are excluded from the computation of diluted earnings per share in the periods where the effect would be antidilutive. For diluted earnings per share, net income available to common shareholders can be affected by the conversion of our convertible Series A Preferred Stock. Where the effect of this conversion would be dilutive, net income available to common shareholders is adjusted by the amount of preferred dividends associated with our Series A Preferred Stock. Our basic and diluted earnings per common share are calculated as follows: Three months ended Nine months ended dollars in millions, except per share amounts 2015 2014 2015 2014 EARNINGS Income (loss) from continuing operations $ 220 $ 203 $ 686 $ 694 Less: Net income (loss) attributable to noncontrolling interests (2 ) — 1 6 Income (loss) from continuing operations attributable to Key 222 203 685 688 Less: Dividends on Series A Preferred Stock 6 6 17 17 Income (loss) from continuing operations attributable to Key common shareholders 216 197 668 671 Income (loss) from discontinued operations, net of (a) (3 ) (17 ) 5 (41 ) Net income (loss) attributable to Key common shareholders $ 213 $ 180 $ 673 $ 630 WEIGHTED-AVERAGE COMMON SHARES Weighted-average common shares outstanding (000) 831,430 867,350 839,758 875,728 Effect of convertible preferred stock — — — — Effect of common share options and other stock awards 7,450 6,772 7,613 6,723 Weighted-average common shares and potential common shares outstanding (000) (b) 838,880 874,122 847,371 882,451 EARNINGS PER COMMON SHARE Income (loss) from continuing operations attributable to Key common shareholders $ .26 $ .23 $ .79 $ .77 Income (loss) from discontinued operations, net of (a) — (.02 ) .01 (.05 ) Net income (loss) attributable to Key common shareholders (c) .26 .21 .80 .72 Income (loss) from continuing operations attributable to Key common shareholders — assuming dilution $ .26 $ .23 $ .78 $ .76 Income (loss) from discontinued operations, net of (a) — (.02 ) .01 (.05 ) Net income (loss) attributable to Key common shareholders — assuming dilution (c) .25 .21 .79 .71 (a) In April 2009, we decided to wind down the operations of Austin, a subsidiary that specialized in managing hedge fund investments for institutional customers. In September 2009, we decided to discontinue the education lending business conducted through Key Education Resources, the education payment and financing unit of KeyBank. In February 2013, we decided to sell Victory to a private equity fund. As a result of these decisions, we have accounted for these businesses as discontinued operations. For further discussion regarding the income (loss) from discontinued operations, see Note 11 (“Acquisitions and Discontinued Operations”). (b) Assumes conversion of common share options and other stock awards and/or convertible preferred stock, as applicable. (c) EPS may not foot due to rounding.

Loans and Loans Held for Sale

Loans and Loans Held for Sale	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Loans and Loans Held for Sale	3. Loans and Loans Held for Sale Our loans by category are summarized as follows: in millions September 30, December 31, September 30, Commercial, financial and agricultural (a) $ 31,095 $ 27,982 $ 26,683 Commercial real estate: Commercial mortgage 8,180 8,047 8,276 Construction 1,070 1,100 1,036 Total commercial real estate loans 9,250 9,147 9,312 Commercial lease financing (b) 3,929 4,252 4,135 Total commercial loans 44,274 41,381 40,130 Residential — prime loans: Real estate — residential mortgage 2,267 2,225 2,213 Home equity: Key Community Bank 10,282 10,366 10,380 Other 222 267 283 Total home equity loans 10,504 10,633 10,663 Total residential — prime loans 12,771 12,858 12,876 Consumer other — Key Community Bank 1,612 1,560 1,546 Credit cards 770 754 724 Consumer other: Marine 620 779 828 Other 38 49 51 Total consumer other 658 828 879 Total consumer loans 15,811 16,000 16,025 Total loans (c) (d) $ 60,085 $ 57,381 $ 56,155 (a) Loan balances include $88 million, $88 million, and $90 million of commercial credit card balances at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. (b) Commercial lease financing includes receivables held as collateral for a secured borrowing of $162 million, $302 million, and $367 million at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. Principal reductions are based on the cash payments received from these related receivables. Additional information pertaining to this secured borrowing is included in Note 18 (“Long-Term Debt”) beginning on page 202 of our 2014 Form 10-K. (c) At September 30, 2015, total loans include purchased loans of $119 million, of which $12 million were PCI loans. At December 31, 2014, total loans include purchased loans of $138 million, of which $13 million were PCI loans. At September 30, 2014, total loans include purchased loans of $143 million, of which $14 million were PCI loans. (d) Total loans exclude loans of $1.9 billion at September 30, 2015, $2.3 billion at December 31, 2014, and $2.4 billion at September 30, 2014, related to the discontinued operations of the education lending business. Additional information pertaining to these loans is provided in Note 11 (“Acquisitions and Discontinued Operations”). Our loans held for sale are summarized as follows: in millions September 30, December 31, September 30, Commercial, financial and agricultural $ 74 $ 63 $ 30 Real estate — commercial mortgage 806 638 725 Commercial lease financing 10 15 10 Real estate — residential mortgage 26 18 19 Total loans held for sale (a) $ 916 $ 734 $ 784 (a) Total loans held for sale exclude loans held for sale of $169 million at September 30, 2015, related to the discontinued operations of the education lending business. Additional information pertaining to these loans is provided in Note 11. Our quarterly summary of changes in loans held for sale follows: in millions September 30, December 31, September 30, Balance at beginning of the period $ 835 $ 784 $ 435 New originations 1,673 2,465 1,593 Transfers from (to) held to maturity, net 24 2 — Loan sales (1,616 ) (2,516 ) (1,243 ) Loan draws (payments), net — (1 ) (1 ) Balance at end of period (a) $ 916 $ 734 $ 784 (a) Total loans held for sale exclude loans held for sale of $169 million at September 30, 2015, related to the discontinued operations of the education lending business. Additional information pertaining to these loans is provided in Note 11.

Asset Quality

Asset Quality	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Asset Quality	4. Asset Quality We assess the credit quality of the loan portfolio by monitoring net credit losses, levels of nonperforming assets and delinquencies, and credit quality ratings as defined by management. Nonperforming loans are loans for which we do not accrue interest income, and include commercial and consumer loans and leases, as well as current year TDRs and nonaccruing TDR loans from prior years. Nonperforming loans do not include loans held for sale or PCI loans. Nonperforming assets include nonperforming loans, nonperforming loans held for sale, OREO, and other nonperforming assets. Our nonperforming assets and past due loans were as follows: in millions September 30, December 31, September 30, Total nonperforming loans (a), (b) $ 400 $ 418 $ 401 Nonperforming loans held for sale — — — OREO (c) 17 18 16 Other nonperforming assets — — 1 Total nonperforming assets $ 417 $ 436 $ 418 Nonperforming assets from discontinued operations—education lending (d) $ 8 $ 11 $ 9 Restructured loans included in nonperforming loans $ 159 $ 157 $ 137 Restructured loans with an allocated specific allowance (e) 71 82 115 Specifically allocated allowance for restructured loans (f) 29 34 30 Accruing loans past due 90 days or more $ 54 $ 96 $ 71 Accruing loans past due 30 through 89 days 271 235 340 (a) Loan balances exclude $12 million, $13 million, and $14 million of PCI loans at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. (b) Includes carrying value of consumer residential mortgage loans in the process of foreclosure of approximately $114 million at September 30, 2015. (c) Includes carrying value of foreclosed residential real estate of approximately $13 million at September 30, 2015. (d) Restructured loans of approximately $20 million, $17 million, and $16 million are included in discontinued operations at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. See Note 11 (“Acquisitions and Discontinued Operations”) for further discussion. (e) Included in individually impaired loans allocated a specific allowance. (f) Included in allowance for individually evaluated impaired loans. We evaluate purchased loans for impairment in accordance with the applicable accounting guidance. Purchased loans that have evidence of deterioration in credit quality since origination and for which it is probable, at acquisition, that all contractually required payments will not be collected are deemed PCI and initially recorded at fair value without recording an allowance for loan losses. At the 2012 acquisition date, the estimated gross contractual amount receivable of all PCI loans totaled $41 million. The estimated cash flows not expected to be collected (the nonaccretable amount) were $11 million, and the accretable amount was approximately $5 million. The difference between the fair value and the cash flows expected to be collected from the purchased loans is accreted to interest income over the remaining term of the loans. At September 30, 2015, the outstanding unpaid principal balance and carrying value of all PCI loans was $18 million and $12 million, respectively. Changes in the accretable yield during the first nine months of 2015 included accretion and net reclassifications of less than $1 million, resulting in an ending balance of $5 million at September 30, 2015. At September 30, 2015, the approximate carrying amount of our commercial nonperforming loans outstanding represented 74% of their original contractual amount owed, total nonperforming loans outstanding represented 79% of their original contractual amount owed, and nonperforming assets in total were carried at 79% of their original contractual amount owed. At September 30, 2015, our 20 largest nonperforming loans totaled $112 million, representing 28% of total loans on nonperforming status. At September 30, 2014, our 20 largest nonperforming loans totaled $72 million, representing 18% of total loans on nonperforming status. Nonperforming loans and loans held for sale reduced expected interest income by $12 million for the nine months ended September 30, 2015, and $16 million for the year ended December 31, 2014. The following tables set forth a further breakdown of individually impaired loans as of September 30, 2015, December 31, 2014, and September 30, 2014: Unpaid Average September 30, 2015 Recorded Principal Specific Recorded in millions Investment (a) Balance (b) Allowance Investment With no related allowance recorded: Commercial, financial and agricultural $ 30 $ 54 — $ 19 Commercial real estate: Commercial mortgage 9 12 — 10 Construction 5 5 — 6 Total commercial real estate loans 14 17 — 16 Total commercial loans 44 71 — 35 Real estate — residential mortgage 22 22 — 22 Home equity: Key Community Bank 58 58 — 59 Other 2 2 — 2 Total home equity loans 60 60 — 61 Consumer other: Marine 1 1 — 1 Total consumer other 1 1 — 1 Total consumer loans 83 83 — 84 Total loans with no related allowance recorded 127 154 — 119 With an allowance recorded: Commercial, financial and agricultural 43 56 $ 9 58 Commercial real estate: Commercial mortgage 5 6 1 6 Total commercial real estate loans 5 6 1 6 Total commercial loans 48 62 10 64 Real estate — residential mortgage 33 33 5 33 Home equity: Key Community Bank 54 54 17 53 Other 10 10 1 10 Total home equity loans 64 64 18 63 Consumer other — Key Community Bank 3 3 — 3 Credit cards 3 3 1 3 Consumer other: Marine 38 38 2 39 Other 2 2 — 2 Total consumer other 40 40 2 41 Total consumer loans 143 143 26 143 Total loans with an allowance recorded 191 205 36 207 Total $ 318 $ 359 $ 36 $ 326 (a) The Recorded Investment represents the face amount of the loan increased or decreased by applicable accrued interest, net deferred loan fees and costs, and unamortized premium or discount, and reflects direct charge-offs. This amount is a component of total loans on our consolidated balance sheet. (b) The Unpaid Principal Balance represents the customer’s legal obligation to us. Unpaid Average December 31, 2014 Recorded Principal Specific Recorded in millions Investment (a) Balance (b) Allowance Investment With no related allowance recorded: Commercial, financial and agricultural $ 6 $ 17 — $ 8 Commercial real estate: Commercial mortgage 15 20 — 19 Construction 5 6 — 7 Total commercial real estate loans 20 26 — 26 Total commercial loans 26 43 — 34 Real estate — residential mortgage 24 24 — 30 Home equity: Key Community Bank 62 63 — 63 Other 1 1 — 2 Total home equity loans 63 64 — 65 Consumer other: Marine 2 2 — 2 Total consumer other 2 2 — 2 Total consumer loans 89 90 — 97 Total loans with no related allowance recorded 115 133 — 131 With an allowance recorded: Commercial, financial and agricultural 37 37 $ 9 28 Commercial real estate: Commercial mortgage 6 6 2 6 Construction 3 3 1 2 Total commercial real estate loans 9 9 3 8 Total commercial loans 46 46 12 36 Real estate — residential mortgage 31 31 5 25 Home equity: Key Community Bank 46 46 16 43 Other 11 11 2 11 Total home equity loans 57 57 18 54 Consumer other — Key Community Bank 4 4 — 3 Credit cards 4 4 — 4 Consumer other: Marine 43 43 5 45 Other 2 2 — 2 Total consumer other 45 45 5 47 Total consumer loans 141 141 28 133 Total loans with an allowance recorded 187 187 40 169 Total $ 302 $ 320 $ 40 $ 300 (a) The Recorded Investment represents the face amount of the loan increased or decreased by applicable accrued interest, net deferred loan fees and costs, and unamortized premium or discount, and reflects direct charge-offs. This amount is a component of total loans on our consolidated balance sheet. (b) The Unpaid Principal Balance represents the customer’s legal obligation to us. Unpaid Average September 30, 2014 Recorded Principal Specific Recorded in millions Investment (a) Balance (b) Allowance Investment With no related allowance recorded: Commercial, financial and agricultural $ 11 $ 20 — $ 12 Commercial real estate: Commercial mortgage 22 27 — 23 Construction 9 20 — 7 Total commercial real estate loans 31 47 — 30 Total commercial loans 42 67 — 42 Real estate — residential mortgage 36 36 — 30 Home equity: Key Community Bank 64 64 — 65 Other 2 2 — 2 Total home equity loans 66 66 — 67 Consumer other: Marine 2 2 — 2 Total consumer other 2 2 — 2 Total consumer loans 104 104 — 99 Total loans with no related allowance recorded 146 171 — 141 With an allowance recorded: Commercial, financial and agricultural 20 21 $ 7 12 Commercial real estate: Commercial mortgage 7 7 2 5 Total commercial real estate loans 7 7 2 5 Total commercial loans 27 28 9 17 Real estate — residential mortgage 19 19 4 24 Home equity: Key Community Bank 41 41 16 39 Other 11 11 2 11 Total home equity loans 52 52 18 50 Consumer other — Key Community Bank 3 3 — 3 Credit cards 3 3 1 3 Consumer other: Marine 46 46 5 47 Other 2 2 1 2 Total consumer other 48 48 6 49 Total consumer loans 125 125 29 129 Total loans with an allowance recorded 152 153 38 146 Total $ 298 $ 324 $ 38 $ 287 (a) The Recorded Investment represents the face amount of the loan increased or decreased by applicable accrued interest, net deferred loan fees and costs, and unamortized premium or discount, and reflects direct charge-offs. This amount is a component of total loans on our consolidated balance sheet. (b) The Unpaid Principal Balance represents the customer’s legal obligation to us. For each of the nine months ended September 30, 2015, and September 30, 2014, interest income recognized on the outstanding balances of accruing impaired loans totaled $5 million. At September 30, 2015, aggregate restructured loans (accrual and nonaccrual loans) totaled $287 million, compared to $270 million at December 31, 2014, and $264 million at September 30, 2014. We added $87 million in restructured loans during the first nine months of 2015, which were partially offset by $70 million in payments and charge-offs. A further breakdown of TDRs included in nonperforming loans by loan category as of September 30, 2015, follows: Pre-modification Post-modification Outstanding Outstanding September 30, 2015 Number Recorded Recorded dollars in millions of Loans Investment Investment LOAN TYPE Nonperforming: Commercial, financial and agricultural 12 $ 56 $ 50 Commercial real estate: Real estate — commercial mortgage 11 30 7 Total commercial real estate loans 11 30 7 Total commercial loans 23 86 57 Real estate — residential mortgage 356 21 21 Home equity: Key Community Bank 1,093 79 70 Other 122 3 3 Total home equity loans 1,215 82 73 Consumer other — Key Community Bank 26 1 1 Credit cards 314 2 2 Consumer other: Marine 92 6 5 Other 16 — — Total consumer other 108 6 5 Total consumer loans 2,019 112 102 Total nonperforming TDRs 2,042 198 159 Prior-year accruing: (a) Commercial, financial and agricultural 12 6 3 Commercial real estate: Real estate — commercial mortgage 1 2 1 Total commercial real estate loans 1 2 1 Total commercial loans 13 8 4 Real estate — residential mortgage 499 36 36 Home equity: Key Community Bank 794 49 42 Other 327 10 8 Total home equity loans 1,121 59 50 Consumer other — Key Community Bank 45 2 1 Credit cards 473 2 2 Consumer other: Marine 398 59 33 Other 68 2 2 Total consumer other 466 61 35 Total consumer loans 2,604 160 124 Total prior-year accruing TDRs 2,617 168 128 Total TDRs 4,659 $ 366 $ 287 (a) All TDRs that were restructured prior to January 1, 2015, and are fully accruing. A further breakdown of TDRs included in nonperforming loans by loan category as of December 31, 2014, follows: Pre-modification Post-modification Outstanding Outstanding December 31, 2014 Number Recorded Recorded dollars in millions of Loans Investment Investment LOAN TYPE Nonperforming: Commercial, financial and agricultural 14 $ 25 $ 23 Commercial real estate: Real estate — commercial mortgage 10 38 13 Real estate — construction 1 5 — Total commercial real estate loans 11 43 13 Total commercial loans 25 68 36 Real estate — residential mortgage 453 27 27 Home equity: Key Community Bank 1,184 79 72 Other 158 4 4 Total home equity loans 1,342 83 76 Consumer other — Key Community Bank 37 2 1 Credit cards 290 2 2 Consumer other: Marine 206 17 14 Other 38 1 1 Total consumer other 244 18 15 Total consumer loans 2,366 132 121 Total nonperforming TDRs 2,391 200 157 Prior-year accruing: (a) Commercial, financial and agricultural 20 6 3 Commercial real estate: Real estate — commercial mortgage 1 2 1 Total commercial real estate loans 1 2 1 Total commercial loans 21 8 4 Real estate — residential mortgage 381 29 29 Home equity: Key Community Bank 674 41 36 Other 310 9 8 Total home equity loans 984 50 44 Consumer other — Key Community Bank 45 2 2 Credit cards 514 4 2 Consumer other: Marine 373 54 31 Other 67 2 1 Total consumer other 440 56 32 Total consumer loans 2,364 141 109 Total prior-year accruing TDRs 2,385 149 113 Total TDRs 4,776 $ 349 $ 270 (a) All TDRs that were restructured prior to January 1, 2014, and are fully accruing. A further breakdown of TDRs included in nonperforming loans by loan category as of September 30, 2014, follows: Pre-modification Post-modification Outstanding Outstanding September 30, 2014 Number Recorded Recorded dollars in millions of Loans Investment Investment LOAN TYPE Nonperforming: Commercial, financial and agricultural 20 $ 16 $ 9 Commercial real estate: Real estate — commercial mortgage 12 39 14 Real estate — construction 3 15 1 Total commercial real estate loans 15 54 15 Total commercial loans 35 70 24 Real estate — residential mortgage 464 28 28 Home equity: Key Community Bank 1,125 70 64 Other 133 4 4 Total home equity loans 1,258 74 68 Consumer other — Key Community Bank 31 1 1 Credit cards 156 1 1 Consumer other: Marine 211 16 14 Other 40 1 1 Total consumer other 251 17 15 Total consumer loans 2,160 121 113 Total nonperforming TDRs 2,195 191 137 Prior-year accruing: (a) Commercial, financial and agricultural 25 6 3 Commercial real estate: Real estate — commercial mortgage 4 18 8 Total commercial real estate loans 4 18 8 Total commercial loans 29 24 11 Real estate — residential mortgage 359 28 28 Home equity: Key Community Bank 731 45 40 Other 325 10 8 Total home equity loans 1,056 55 48 Consumer other — Key Community Bank 53 2 2 Credit cards 564 4 3 Consumer other: Marine 402 58 34 Other 72 2 1 Total consumer other 474 60 35 Total consumer loans 2,506 149 116 Total prior-year accruing TDRs 2,535 173 127 Total TDRs 4,730 $ 364 $ 264 (a) All TDRs that were restructured prior to January 1, 2014, and are fully accruing. We classify loan modifications as TDRs when a borrower is experiencing financial difficulties and we have granted a concession without commensurate financial, structural, or legal consideration. All commercial and consumer loan TDRs, regardless of size, are individually evaluated for impairment to determine the probable loss content and are assigned a specific loan allowance if deemed appropriate. This designation has the effect of moving the loan from the general reserve methodology (i.e., collectively evaluated) to the specific reserve methodology (i.e., individually evaluated) and may impact the ALLL through a charge-off or increased loan loss provision. These components affect the ultimate allowance level. Additional information regarding TDRs for discontinued operations is provided in Note 11. Commercial loan TDRs are considered defaulted when principal and interest payments are 90 days past due. Consumer loan TDRs are considered defaulted when principal and interest payments are more than 60 days past due. During the three months ended September 30, 2015, there were no significant commercial loan TDRs, and 61 consumer loan TDRs with a combined recorded investment of $3 million that experienced payment defaults from modifications resulting in TDR status during 2014. During the three months ended September 30, 2014, there were no significant commercial loan TDRs, and 93 consumer loan TDRs with a combined recorded investment of $4 million that experienced payment defaults from modifications resulting in TDR status during 2013. As TDRs are individually evaluated for impairment under the specific reserve methodology, subsequent defaults do not generally have a significant additional impact on the ALLL. Our loan modifications are handled on a case-by-case basis and are negotiated to achieve mutually agreeable terms that maximize loan collectability and meet the borrower’s financial needs. Our concession types are primarily interest rate reductions, forgiveness of principal, and other modifications. The commercial TDR other concession category includes modification of loan terms, covenants, or conditions. The consumer TDR other concession category primarily includes those borrowers’ debts that are discharged through Chapter 7 bankruptcy and have not been formally re-affirmed. The following table shows the post-modification outstanding recorded investment by concession type for our commercial and consumer accruing and nonaccruing TDRs and other selected financial data. in millions September 30, December 31, September 30, Commercial loans: Interest rate reduction $ 58 $ 13 $ 24 Forgiveness of principal 2 2 5 Other 1 25 6 Total $ 61 $ 40 $ 35 Consumer loans: Interest rate reduction $ 139 $ 140 $ 140 Forgiveness of principal 4 4 4 Other 83 86 85 Total $ 226 $ 230 $ 229 Total commercial and consumer TDRs (a) $ 287 $ 270 $ 264 Total loans 60,085 57,381 56,155 (a) Commitments outstanding to lend additional funds to borrowers whose loan terms have been modified in TDRs are $8 million, $5 million, and $1 million at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. Our policies for determining past due loans, placing loans on nonaccrual, applying payments on nonaccrual loans, and resuming accrual of interest for our commercial and consumer loan portfolios are disclosed in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Nonperforming Loans” beginning on page 116 of our 2014 Form 10-K. At September 30, 2015, approximately $59.3 billion, or 98.8%, of our total loans were current, compared to $56.6 billion, or 98.7%, at December 31, 2014, and $55.3 billion, or 98.5%, at September 30, 2014. At September 30, 2015, total past due loans and nonperforming loans of $724 million represented approximately 1.2% of total loans, compared to $749 million, or 1.3%, at December 31, 2014, and $813 million, or 1.5% at September 30, 2014. The following aging analysis of past due and current loans as of September 30, 2015, December 31, 2014, and September 30, 2014, provides further information regarding Key’s credit exposure. 90 and Total Past 30-59 60-89 Greater Due and Purchased September 30, 2015 Days Past Days Past Days Past Nonperforming Nonperforming Credit Total in millions Current Due Due Due Loans Loans Impaired Loans LOAN TYPE Commercial, financial and agricultural $ 30,901 $ 58 $ 30 $ 17 $ 89 $ 194 — $ 31,095 Commercial real estate: Commercial mortgage 8,127 18 7 5 23 53 — 8,180 Construction 1,060 1 — — 9 10 — 1,070 Total commercial real estate loans 9,187 19 7 5 32 63 — 9,250 Commercial lease financing 3,875 29 3 1 21 54 — 3,929 Total commercial loans $ 43,963 $ 106 $ 40 $ 23 $ 142 $ 311 — $ 44,274 Real estate — residential mortgage $ 2,171 $ 11 $ 4 $ 3 $ 67 $ 85 $ 11 $ 2,267 Home equity: Key Community Bank 10,027 49 20 11 174 254 1 10,282 Other 208 4 2 1 7 14 — 222 Total home equity loans 10,235 53 22 12 181 268 1 10,504 Consumer other — Key Community Bank 1,595 7 4 5 1 17 — 1,612 Credit cards 750 6 4 8 2 20 — 770 Consumer other: Marine 601 10 2 1 6 19 — 620 Other 34 1 1 1 1 4 — 38 Total consumer other 635 11 3 2 7 23 — 658 Total consumer loans $ 15,386 $ 88 $ 37 $ 30 $ 258 $ 413 $ 12 $ 15,811 Total loans $ 59,349 $ 194 $ 77 $ 53 $ 400 $ 724 $ 12 $ 60,085 90 and Total Past 30-59 60-89 Greater Due and Purchased December 31, 2014 Days Past Days Past Days Past Nonperforming Nonperforming Credit Total in millions Current Due Due Due Loans Loans Impaired Loans LOAN TYPE Commercial, financial and agricultural $ 27,858 $ 19 $ 14 $ 32 $ 59 $ 124 — $ 27,982 Commercial real estate: Commercial mortgage 7,981 6 10 16 34 66 — 8,047 Construction 1,084 2 — 1 13 16 — 1,100 Total commercial real estate loans 9,065 8 10 17 47 82 — 9,147 Commercial lease financing 4,172 30 21 11 18 80 — 4,252 Total commercial loans $ 41,095 $ 57 $ 45 $ 60 $ 124 $ 286 — $ 41,381 Real estate — residential mortgage $ 2,111 $ 12 $ 7 $ 4 $ 79 $ 102 $ 12 $ 2,225 Home equity: Key Community Bank 10,098 46 22 14 185 267 1 10,366 Other 249 5 2 1 10 18 — 267 Total home equity loans 10,347 51 24 15 195 285 1 10,633 Consumer other — Key Community Bank 1,541 9 3 5 2 19 — 1,560 Credit cards 733 6 4 9 2 21 — 754 Consumer other: Marine 746 11 5 2 15 33 — 779 Other 46 1 — 1 1 3 — 49 Total consumer other 792 12 5 3 16 36 — 828 Total consumer loans $ 15,524 $ 90 $ 43 $ 36 $ 294 $ 463 $ 13 $ 16,000 Total loans $ 56,619 $ 147 $ 88 $ 96 $ 418 $ 749 $ 13 $ 57,381 90 and Total Past 30-59 60-89 Greater Due and Purchased September 30, 2014 Days Past Days Past Days Past Nonperforming Nonperforming Credit Total in millions Current Due Due Due Loans Loans Impaired Loans LOAN TYPE Commercial, financial and agricultural $ 26,534 $ 50 $ 34 $ 18 $ 47 $ 149 — $ 26,683 Commercial real estate: Commercial mortgage 8,201 17 7 9 41 74 $ 1 8,276 Construction 1,017 3 2 — 14 19 — 1,036 Total commercial real estate loans 9,218 20 9 9 55 93 1 9,312 Commercial lease financing 4,017 74 24 6 14 118 — 4,135 Total commercial loans $ 39,769 $ 144 $ 67 $ 33 $ 116 $ 360 $ 1 $ 40,130 Real estate — residential mortgage $ 2,091 $ 17 $ 7 $ 5 $ 81 $ 110 $ 12 $ 2,213 Home equity: Key Community Bank 10,124 46 19 16 174 255 1 10,380 Other 266 4 2 1 10 17 — 283 Total home equity loans 10,390 50 21 17 184 272 1 10,663 Consumer other — Key Community Bank 1,528 7 3 6 2 18 — 1,546 Credit cards 705 5 4 9 1 19 — 724 Consumer other: Marine 796 11 4 1 16 32 — 828 Other 49 1 — — 1 2 — 51 Total consumer other 845 12 4 1 17 34 — 879 Total consumer loans $ 15,559 $ 91 $ 39 $ 38 $ 285 $ 453 $ 13 $ 16,025 Total loans $ 55,328 $ 235 $ 106 $ 71 $ 401 $ 813 $ 14 $ 56,155 The prevalent risk characteristic for both commercial and consumer loans is the risk of loss arising from an obligor’s inability or failure to meet contractual payment or performance terms. Evaluation of this risk is stratified and monitored by the loan risk rating grades assigned for the commercial loan portfolios and the regulatory risk ratings assigned for the consumer loan portfolios. Most extensions of credit are subject to loan grading or scoring. Loan grades are assigned at the time of origination, verified by credit risk management, and periodically re-evaluated thereafter. This risk rating methodology blends our judgment with quantitative modeling. Commercial loans generally are assigned two internal risk ratings. The first rating reflects the probability that the borrower will default on an obligation; the second rating reflects expected recovery rates on the credit facility. Default probability is determined based on, among other factors, the financial strength of the borrower, an assessment of the borrower’s management, the borrower’s competitive position within its industry sector, and our view of industry risk in the context of the general economic outlook. Types of exposure, transaction structure, and collateral, including credit risk mitigants, affect the expected recovery assessment. Credit quality indicators for loans are updated on an ongoing basis. Bond rating classifications are indicative of the credit quality of our commercial loan portfolios and are determined by converting our internally assigned risk rating grades to bond rating categories. Payment activity and the regulatory classifications of pass and substandard are indicators of the credit quality of our consumer loan portfolios. Credit quality indicators for our commercial and consumer loan portfolios, excluding $12 million and $14 million of PCI loans at September 30, 2015, and September 30, 2014, respectively, based on bond rating, regulatory classification, and payment activity as of September 30, 2015, and September 30, 2014, are as follows: Commercial Credit Exposure Credit Risk Profile by Creditworthiness Category (a) September 30, in millions Commercial, financial and agricultural RE — Commercial RE — Construction Commercial Lease Total RATING (b), (c) 2015 2014 2015 2014 2015 2014 2015 2014 2015 2014 AAA — AA $ 384 $ 342 $ 3 $ 2 — $ 1 $ 501 $ 528 $ 888 $ 873 A 1,439 1,147 4 2 — — 478 596 1,921 1,745 BBB — BB 27,438 23,822 7,690 7,736 $ 935 895 2,808 2,848 38,871 35,301 B 639 594 272 298 89 100 88 75 1,088 1,067 CCC — C 1,195 778 211 238 46 40 54 88 1,506 1,144 Total $ 31,095 $ 26,683 $ 8,180 $ 8,276 $ 1,070 $ 1,036 $ 3,929 $ 4,135 $ 44,274 $ 40,130 (a) Credit quality indicators are updated on an ongoing basis and reflect credit quality information as of the dates indicated. (b) Our bond rating to internal loan grade conversion system is as follows: AAA - AA = 1, A = 2, BBB - BB = 3 - 13, B = 14 - 16, and CCC - C = 17 - 20. (c) Our internal loan grade to regulatory-defined classification is as follows: Pass = 1-16, Special Mention = 17, Substandard = 18, Doubtful = 19, and Loss = 20. Consumer Credit Exposure Credit Risk Profile by Regulatory Classifications (a), (b) September 30, in millions Residential — Prime GRADE 2015 2014 Pass $ 12,496 $ 12,576 Substandard 263 287 Total $ 12,759 $ 12,863 Credit Risk Profile Based on Payment Activity (a) September 30, Consumer — Key Community Bank Credit cards Consumer — Marine Consumer — Other Total in millions 2015 2014 2015 2014 2015 2014 2015 2014 2015 2014 Performing $ 1,611 $ 1,544 $ 768 $ 723 $ 614 $ 812 $ 37 $ 50 $ 3,030 $ 3,129 Nonperforming 1 2 2 1 6 16 1 1 10 20 Total $ 1,612 $ 1,546 $ 770 $ 724 $ 620 $ 828 $ 38 $ 51 $ 3,040 $ 3,149 (a) Credit quality indicators are updated on an ongoing basis and reflect credit quality information as of the dates indicated. (b) Our past due payment activity to regulatory classification conversion is as follows: pass = less than 90 days; and substandard = 90 days and greater plus nonperforming loans. We determine the appropriate level of the ALLL on at least a quarterly basis. The methodology is described in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Allowance for Loan and Lease Losses” beginning on page 117 of our 2014 Form 10-K. We apply expected loss rates to existing loans with similar risk characteristics as noted in the credit quality indicator table above and exercise judgment to assess the impact of qualitative factors such as changes in economic conditions, changes in credit policies or underwriting standards, and changes in the level of credit risk associated with specific industries and markets. In the third quarter of 2015, we enhanced the approach used to determine the commercial reserve factors used in estimating the commercial ALLL, which had the effect of capturing certain elements in the commercial quantitative reserve component that had formerly been included in the commercial qualitative component. Under the enhanced methodology, we began utilizing more refined commercial estimated loss rates that represent cumulative losses over the estimated average time period from the onset of credit deterioration to the initial loss recorded for an individual loan. In addition, we began utilizing an enhanced framework to quantify commercial ALLL adjustments resulting from qualitative factors that may not be fully captured within the statistical analysis of incurred loss. The impact of these changes was largely neutral to the total ALLL at September 30, 2015. However, because the quantitative reserve is allocated to the business segments at a loan level, while the qualitative portion is allocated at the portfolio level, the impact of the methodology enhancements on the allowance for each portfolio caused the commercial portfolio ALLL to increase or decrease accordingly. The impact of the increases and decreases on the commercial portfolio ALLL was not significant. For all commercial and consumer loan TDRs, regardless of size, as well as impaired commercial loans with an outstanding balance of $2.5 million or greater, we conduct further analysis to determine the probable loss content and assign a specific allowance to the loan if deemed appropriate. We estimate the extent of the individual impairment for commercial loans and TDRs by comparing the recorded investment of the loan with the estimated present value of its future cash flows, the fair value of its underlying collateral, or the loan’s observable market price. Secured consumer loan TDRs that are discharged through Chapter 7 bankruptcy and not formally re-affirmed are adjusted to reflect the fair value of the underlying collateral, less costs to sell. Non-Chapter 7 consumer loan TDRs are combined in homogenous pools and assigned a specific allocation based on the estimated present value of future cash flows using the loan’s effective interest rate. A specific allowance also may be assigned — even when sources of repayment appear sufficient — if we remain uncertain about whether the loan will be repaid in full. On at least a quarterly basis, we evaluate the appropriateness of our loss estimation methods to reduce differences between estimated incurred losses and actual losses. The ALLL at September 30, 2015, represents our best estimate of the probable credit losses inherent in the loan portfolio at that date. Commercial loans generally are charged off in full or charged down to the fair value of the underlying collateral when the borrower’s payment is 180 days past due. Consumer loans generally are charged off when payments are 120 days past due. Home equity and residential mortgage loans generally are charged down to net realizable value when payment is 180 days past due. Credit card loans, and similar unsecured products, are charged off when payments are 180 days past due. At September 30, 2015, the ALLL was $790 million, or 1.31% of loans, compared to $804 million, or 1.43% of loans, at September 30, 2014. At September 30, 2015, the ALLL was 197.5% of nonperforming loans, compared to 200.5% at September 30, 2014. A summary of the changes in the ALLL for the periods indicated is presented in the table below: Three months ended Nine months ended in millions 2015 2014 2015 2014 Balance at beginning of period — continuing operations $ 796 $ 814 $ 794 $ 848 Charge-offs (53 ) (49 ) (152 ) (162 ) Recoveries 12 18 47 81 Net loans and leases charged off (41 ) (31 ) (105 ) (81 ) Provision for loan and lease losses from continuing operations 36 21 102 37 Foreign currency translation adjustment (1 ) — (1 ) — Balance at end of period — continuing operations $ 790 $ 804 $ 790 $ 804 The changes in the ALLL by loan category for the periods indicated are as follows: in millions December 31, 2014 Provision Charge-offs Recoveries September 30, 2015 Commercial, financial and agricultural $ 391 $ 93 $ (59 ) $ 13 $ 438 Real estate — commercial mortgage 148 (9 ) (2 ) 2 139 Real estate — construction 28 (3 ) (1 ) 1 25 Commercial lease financing 56 (13 ) (5 ) 7 45 Total commercial loans 623 68 (67 ) 23 647 Real estate — residential mortgage 23 (1 ) (4 ) 1 19 Home equity: Key Community Bank 66 4 (21 ) 5 54 Other 5 (1 ) (4 ) 4 4 Total home equity loans 71 3 (25 ) 9 58 Consumer other — Key Community Bank 22 11 (18 ) 5 20 Credit cards 33 20 (23 ) 2 32 Consumer other: Marine 21 — (14 ) 6 13 Other 1 — (1 ) 1 1 Total consumer other: 22 — (15 ) 7 14 Total consumer loans 171 33 (85 ) 24 143 Total ALLL — continuing operations 794 101 (a) (152 ) 47 790 Discontinued operations 29 9 (25 ) 10 23 Total ALLL — including discontinued operations $ 823 $ 110 $ (177 ) $ 57 $ 813 (a) Includes a $1 million foreign currency translation adjustment. Excludes a provision for losses on lending-related commitments of $19 million. in millions December 31, 2013 Provision Charge-offs Recoveries September 30, 2014 Commercial, financial and agricultural $ 362 $ 32 $ (35 ) $ 27 $ 386 Real estate — commercial mortgage 165 (7 ) (3 ) 4 159 Real estate — construction 32 (16 ) (4 ) 16 28 Commercial lease financing 62 (9 ) (6 ) 8 55 Total commercial loans 621 — (48 ) 55 628 Real estate — residential mortgage 37 (10 ) (7 ) 2 22 Home equity: Key Community Bank 84 9 (29 ) 7 71 Other 11 (1 ) (8 ) 4 6 Total home equity loans 95 8 (37 ) 11 77 Consumer other — Key Community Bank 29 14 (23 ) 4 24 Credit cards 34 24 (27 ) 1 32 Consumer other: Marine 29 1 (18 ) 7 19 Other 3 — (2 ) 1 2 Total consumer other: 32 1 (20 ) 8 21 Total consumer loans 227 37 (114 ) 26 176 Total ALLL — continuing operations 848 37 (a) (162 ) 81 804 Disc

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	5. Fair Value Measurements Fair Value Determination As defined in the applicable accounting guidance, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in our principal market. We have established and documented our process for determining the fair values of our assets and liabilities, where applicable. Fair value is based on quoted market prices, when available, for identical or similar assets or liabilities. In the absence of quoted market prices, we determine the fair value of our assets and liabilities using valuation models or third-party pricing services. Both of these approaches rely on market-based parameters, when available, such as interest rate yield curves, option volatilities, and credit spreads, or unobservable inputs. Unobservable inputs may be based on our judgment, assumptions, and estimates related to credit quality, liquidity, interest rates, and other relevant inputs. Valuation adjustments, such as those pertaining to counterparty and our own credit quality and liquidity, may be necessary to ensure that assets and liabilities are recorded at fair value. Credit valuation adjustments are made when market pricing does not accurately reflect the counterparty’s or our own credit quality. We make liquidity valuation adjustments to the fair value of certain assets to reflect the uncertainty in the pricing and trading of the instruments when we are unable to observe recent market transactions for identical or similar instruments. Liquidity valuation adjustments are based on the following factors: • the amount of time since the last relevant valuation; • whether there is an actual trade or relevant external quote available at the measurement date; and • volatility associated with the primary pricing components. We ensure that our fair value measurements are accurate and appropriate by relying upon various controls, including: • an independent review and approval of valuation models and assumptions; • recurring detailed reviews of profit and loss; and • a validation of valuation model components against benchmark data and similar products, where possible. We recognize transfers between levels of the fair value hierarchy at the end of the reporting period. Quarterly, we review any changes to our valuation methodologies to ensure they are appropriate and justified, and refine our valuation methodologies if more market-based data becomes available. The Fair Value Committee, which is governed by ALCO, oversees the valuation process for all lines of business and support areas, as applicable. Various Working Groups that report to the Fair Value Committee analyze and approve the underlying assumptions and valuation adjustments. Changes in valuation methodologies for Level 1 and Level 2 instruments are presented to the Accounting Policy group for approval. Changes in valuation methodologies for Level 3 instruments are presented to the Fair Value Committee for approval. The Working Groups are discussed in more detail in the qualitative disclosures within this note and in Note 11 (“Acquisitions and Discontinued Operations”). Formal documentation of the fair valuation methodologies is prepared by the lines of business and support areas as appropriate. The documentation details the asset or liability class and related general ledger accounts, valuation techniques, fair value hierarchy level, market participants, accounting methods, valuation methodology, group responsible for valuations, and valuation inputs. Additional information regarding our accounting policies for determining fair value is provided in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Fair Value Measurements” beginning on page 118 of our 2014 Form 10-K. Qualitative Disclosures of Valuation Techniques Loans Securities (trading and available for sale) . • Securities are classified as Level 1 when quoted market prices are available in an active market for the identical securities. Level 1 instruments include exchange-traded equity securities. • Securities are classified as Level 2 if quoted prices for identical securities are not available, and fair value is determined using pricing models (either by a third-party pricing service or internally) or quoted prices of similar securities. These instruments include municipal bonds; bonds backed by the U.S. government; corporate bonds; certain mortgage-backed securities; securities issued by the U.S. Treasury; money markets; and certain agency and corporate CMOs. Inputs to the pricing models include: standard inputs, such as yields, benchmark securities, bids, and offers; actual trade data (i.e., spreads, credit ratings, and interest rates) for comparable assets; spread tables; matrices; high-grade scales; and option-adjusted spreads. • Securities are classified as Level 3 when there is limited activity in the market for a particular instrument. To determine fair value in such cases, depending on the complexity of the valuations required, we use internal models based on certain assumptions or a third-party valuation service. At September 30, 2015, our Level 3 instruments consist of two convertible preferred securities. Our Strategy group is responsible for reviewing the valuation model and determining the fair value of these investments on a quarterly basis. The securities are valued using a cash flow analysis of the associated private company issuers. The valuations of the securities are negatively impacted by projected net losses of the associated private companies and positively impacted by projected net gains. The fair values of our Level 2 securities available for sale are determined by a third-party pricing service. The valuations provided by the third-party pricing service are based on observable market inputs, which include benchmark yields, reported trades, issuer spreads, benchmark securities, bids, offers, and reference data obtained from market research publications. Inputs used by the third-party pricing service in valuing CMOs and other mortgage-backed securities also include new issue data, monthly payment information, whole loan collateral performance, and “To Be Announced” prices. In valuations of securities issued by state and political subdivisions, inputs used by the third-party pricing service also include material event notices. On a monthly basis, we validate the pricing methodologies utilized by our third-party pricing service to ensure the fair value determination is consistent with the applicable accounting guidance and that our assets are properly classified in the fair value hierarchy. To perform this validation, we: • review documentation received from our third-party pricing service regarding the inputs used in their valuations and determine a level assessment for each category of securities; • substantiate actual inputs used for a sample of securities by comparing the actual inputs used by our third-party pricing service to comparable inputs for similar securities; and • substantiate the fair values determined for a sample of securities by comparing the fair values provided by our third-party pricing service to prices from other independent sources for the same and similar securities. We analyze variances and conduct additional research with our third-party pricing service and take appropriate steps based on our findings. Private equity and mezzanine investments . Private equity and mezzanine investments are classified as Level 3 assets since our judgment significantly influences the determination of fair value. Our Fund Management, Asset Management, and Accounting groups are responsible for reviewing the valuation models and determining the fair value of these investments on a quarterly basis. Direct investments in properties are initially valued based upon the transaction price. This amount is then adjusted to fair value based on current market conditions using the discounted cash flow method based on the expected investment exit date. The fair values of the assets are reviewed and adjusted quarterly. There were no significant direct equity and mezzanine investments at September 30, 2015. Consistent with accounting guidance, indirect investments are valued using a methodology that allows the use of statements from the investment manager to calculate net asset value per share. A primary input used in estimating fair value is the most recent value of the capital accounts as reported by the general partners of the funds in which we invest. The calculation to determine the investment’s fair value is based on our percentage ownership in the fund multiplied by the net asset value of the fund, as provided by the fund manager. Under the requirements of the Volcker Rule, we will be required to dispose of some or all of our indirect investments. As of September 30, 2015, management has not committed to a plan to sell these investments. Therefore, these investments continue to be valued using the net asset value per share methodology. For more information about the Volcker Rule, see the discussion under the heading “Other Regulatory Developments under the Dodd-Frank Act – ‘Volcker Rule’” in the section entitled “Supervision and Regulation” beginning on page 16 of our 2014 Form 10-K. Investments in real estate private equity funds are included within private equity and mezzanine investments. The main purpose of these funds is to acquire a portfolio of real estate investments that provides attractive risk-adjusted returns and current income for investors. Certain of these investments do not have readily determinable fair values and represent our ownership interest in an entity that follows measurement principles under investment company accounting. The following table presents the fair value of our indirect investments and related unfunded commitments at September 30, 2015. We did not provide any financial support to investees related to our direct and indirect investments for the nine months ended September 30, 2015, and September 30, 2014. September 30, 2015 Unfunded in millions Fair Value Commitments INVESTMENT TYPE Indirect investments Passive funds (a) $ 9 $ 1 Total $ 9 $ 1 (a) We invest in passive funds, which are multi-investor private equity funds. These investments can never be redeemed. Instead, distributions are received through the liquidation of the underlying investments in the funds. Some funds have no restrictions on sale, while others require investors to remain in the fund until maturity. The funds will be liquidated over a period of one to four years. The purpose of KREEC’s funding is to allow funds to make additional investments and keep a certain market value threshold in the funds. KREEC is obligated to provide financial support, as all investors are required, to fund based on their ownership percentage, as noted in the Limited Partnership Agreements. Principal investments . Our direct investments include investments in debt and equity instruments of both private and public companies. When quoted prices are available in an active market for the identical direct investment, we use the quoted prices in the valuation process, and the related investments are classified as Level 1 assets. However, in most cases, quoted market prices are not available for our direct investments, and we must perform valuations using other methods. These direct investment valuations are an in-depth analysis of the condition of each investment and are based on the unique facts and circumstances related to each individual investment. There is a certain amount of subjectivity surrounding the valuation of these investments due to the combination of quantitative and qualitative factors that are used in the valuation models. Therefore, these direct investments are classified as Level 3 assets. The specific inputs used in the valuations of each type of direct investment are described below. Interest-bearing securities (i.e., loans) are valued on a quarterly basis. Valuation adjustments are determined by the Principal Investing Entities Deal Team and are subject to approval by the Investment Committee. Valuations of debt instruments are based on the Principal Investing Entities Deal Team’s knowledge of the current financial status of the subject company, which is regularly monitored throughout the term of the investment. Significant unobservable inputs used in the valuations of these investments include the company’s payment history, adequacy of cash flows from operations, and current operating results, including market multiples and historical and forecast EBITDA. Inputs can also include the seniority of the debt, the nature of any pledged collateral, the extent to which the security interest is perfected, and the net liquidation value of collateral. Valuations of equity instruments of private companies, which are prepared on a quarterly basis, are based on current market conditions and the current financial status of each company. A valuation analysis is performed to value each investment. The valuation analysis is reviewed by the Principal Investing Entities Deal Team Member, and reviewed and approved by the Chief Administrative Officer of one of the independent investment managers. Significant unobservable inputs used in these valuations include adequacy of the company’s cash flows from operations, any significant change in the company’s performance since the prior valuation, and any significant equity issuances by the company. Equity instruments of public companies are valued using quoted prices in an active market for the identical security. If the instrument is restricted, the fair value is determined considering the number of shares traded daily, the number of the company’s total restricted shares, and price volatility. Our indirect investments are classified as Level 3 assets since our significant inputs are not observable in the marketplace. Indirect investments include primary and secondary investments in private equity funds engaged mainly in venture- and growth-oriented investing. These investments do not have readily determinable fair values. Indirect investments are valued using a methodology that is consistent with accounting guidance that allows us to estimate fair value based upon net asset value per share (or its equivalent, such as member units or an ownership interest in partners’ capital to which a proportionate share of net assets is attributed). The significant unobservable input used in estimating fair value is primarily the most recent value of the capital accounts as reported by the general partners of the funds in which we invest. Under the requirements of the Volcker Rule, we will be required to dispose of some or all of our indirect investments. As of September 30, 2015, management has not committed to a plan to sell these investments. Therefore, these investments continue to be valued using the net asset value per share methodology. For indirect investments, management may make adjustments it deems appropriate to the net asset value if it is determined that the net asset value does not properly reflect fair value. In determining the need for an adjustment to net asset value, management performs an analysis of the private equity funds based on the independent fund manager’s valuations as well as management’s own judgment. Significant unobservable inputs used in these analyses include current fund financial information provided by the fund manager, an estimate of future proceeds expected to be received on the investment, and market multiples. Management also considers whether the independent fund manager adequately marks down an impaired investment, maintains financial statements in accordance with GAAP, or follows a practice of holding all investments at cost. The following table presents the fair value of our direct and indirect principal investments and related unfunded commitments at September 30, 2015, as well as financial support provided for the three and nine months ended September 30, 2015, and September 30, 2014: Financial support provided Three months ended September 30, Nine months ended September 30, September 30, 2015 2015 2014 2015 2014 Fair Unfunded Funded Funded Funded Funded Funded Funded Funded Funded in millions Value Commitments Commitments Other Commitments Other Commitments Other Commitments Other INVESTMENT TYPE Direct investments (a) $ 66 — — $ — — — — $ 2 — $ 2 Indirect investments (b) 271 $ 53 $ 2 — $ 3 — $ 7 — $ 10 — Total $ 337 $ 53 $ 2 $ — $ 3 — $ 7 $ 2 $ 10 $ 2 (a) Our direct investments consist of equity and debt investments directly in independent business enterprises. Operations of the business enterprises are handled by management of the portfolio company. The purpose of funding these enterprises is to provide financial support for business development and acquisition strategies. We infuse equity capital based on an initial contractual cash contribution and later from additional requests on behalf of the companies’ management. (b) Our indirect investments consist of buyout funds, venture capital funds, and fund of funds. These investments are generally not redeemable. Instead, distributions are received through the liquidation of the underlying investments of the fund. An investment in any one of these funds typically can be sold only with the approval of the fund’s general partners. We estimate that the underlying investments of the funds will be liquidated over a period of one to nine years. The purpose of funding our capital commitments to these investments is to allow the funds to make additional follow-on investments and pay fund expenses until the fund dissolves. We, and all other investors in the fund, are obligated to fund the full amount of our respective capital commitments to the fund based on our and their respective ownership percentages, as noted in the applicable Limited Partnership Agreement. Other. Derivatives . In addition, we have several customized derivative instruments and risk participations that are classified as Level 3 instruments. These derivative positions are valued using internally developed models, with inputs consisting of available market data, such as bond spreads and asset values, as well as unobservable internally derived assumptions, such as loss probabilities and internal risk ratings of customers. These derivatives are priced monthly by our MRM group using a credit valuation adjustment methodology. Swap details with the customer and our related participation percentage, if applicable, are obtained from our derivatives accounting system, which is the system of record. Applicable customer rating information is obtained from the particular loan system and represents an unobservable input to this valuation process. Using these various inputs, a valuation of these Level 3 derivatives is performed using a model that was acquired from a third party. In summary, the fair value represents an estimate of the amount that the risk participation counterparty would need to pay/receive as of the measurement date based on the probability of customer default on the swap transaction and the fair value of the underlying customer swap. Therefore, a higher loss probability and a lower credit rating would negatively affect the fair value of the risk participations and a lower loss probability and higher credit rating would positively affect the fair value of the risk participations. Market convention implies a credit rating of “AA” equivalent in the pricing of derivative contracts, which assumes all counterparties have the same creditworthiness. To reflect the actual exposure on our derivative contracts related to both counterparty and our own creditworthiness, we record a fair value adjustment in the form of a credit valuation adjustment. The credit component is determined by individual counterparty based on the probability of default and considers master netting and collateral agreements. The credit valuation adjustment is classified as Level 3. Our MRM group is responsible for the valuation policies and procedures related to this credit valuation adjustment. A weekly reconciliation process is performed to ensure that all applicable derivative positions are covered in the calculation, which includes transmitting customer exposures and reserve reports to trading management, derivative traders and marketers, derivatives middle office, and corporate accounting personnel. On a quarterly basis, MRM prepares the credit valuation adjustment calculation, which includes a detailed reserve comparison with the previous quarter, an analysis for change in reserve, and a reserve forecast to ensure that the credit valuation adjustment recorded at period end is sufficient. Other assets and liabilities. Assets and Liabilities Measured at Fair Value on a Recurring Basis Certain assets and liabilities are measured at fair value on a recurring basis in accordance with GAAP. The following tables present these assets and liabilities at September 30, 2015, December 31, 2014, and September 30, 2014. September 30, 2015 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Trading account assets: U.S. Treasury, agencies and corporations — $ 694 — $ 694 States and political subdivisions — 35 — 35 Collateralized mortgage obligations — — — — Other mortgage-backed securities — 46 — 46 Other securities $ 4 23 — 27 Total trading account securities 4 798 — 802 Commercial loans — 9 — 9 Total trading account assets 4 807 — 811 Securities available for sale: States and political subdivisions — 15 — 15 Collateralized mortgage obligations — 12,003 — 12,003 Other mortgage-backed securities — 2,330 — 2,330 Other securities 11 — $ 17 28 Total securities available for sale 11 14,348 17 14,376 Other investments: Principal investments: Direct — — 66 66 Indirect — — 271 271 Total principal investments — — 337 337 Equity and mezzanine investments: Direct — — — — Indirect — — 9 9 Total equity and mezzanine investments — — 9 9 Other — — 4 4 Total other investments — — 350 350 Derivative assets: Interest rate — 1,097 22 1,119 Foreign exchange 120 10 — 130 Commodity — 482 — 482 Credit — 4 3 7 Derivative assets 120 1,593 25 1,738 Netting adjustments (a) — — — (945 ) Total derivative assets 120 1,593 25 793 Accrued income and other assets — 2 — 2 Total assets on a recurring basis at fair value $ 135 $ 16,750 $ 392 $ 16,332 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions — $ 677 — $ 677 Derivative liabilities: Interest rate — 656 — 656 Foreign exchange $ 102 10 — 112 Commodity — 469 — 469 Credit — 5 — 5 Derivative liabilities 102 1,140 — 1,242 Netting adjustments (a) — — — (566 ) Total derivative liabilities 102 1,140 — 676 Accrued expense and other liabilities — 2 — 2 Total liabilities on a recurring basis at fair value $ 102 $ 1,819 — $ 1,355 (a) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts with a single counterparty on a net basis and to offset the net derivative position with the related cash collateral. Total derivative assets and liabilities include these netting adjustments. December 31, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Trading account assets: U.S. Treasury, agencies and corporations — $ 555 — $ 555 States and political subdivisions — 38 — 38 Collateralized mortgage obligations — — — — Other mortgage-backed securities — 124 — 124 Other securities $ 2 29 — 31 Total trading account securities 2 746 — 748 Commercial loans — 2 — 2 Total trading account assets 2 748 — 750 Securities available for sale: States and political subdivisions — 23 — 23 Collateralized mortgage obligations — 11,270 — 11,270 Other mortgage-backed securities — 2,035 — 2,035 Other securities 22 — $ 10 32 Total securities available for sale 22 13,328 10 13,360 Other investments: Principal investments: Direct 2 — 102 104 Indirect — — 302 302 Total principal investments 2 — 404 406 Equity and mezzanine investments: Direct — — — — Indirect — — 10 10 Total equity and mezzanine investments — — 10 10 Other — — 4 4 Total other investments 2 — 418 420 Derivative assets: Interest rate — 924 13 937 Foreign exchange 91 2 — 93 Commodity — 608 — 608 Credit — 2 3 5 Derivative assets 91 1,536 16 1,643 Netting adjustments (a) — — — (1,034 ) Total derivative assets 91 1,536 16 609 Accrued income and other assets — — — — Total assets on a recurring basis at fair value $ 117 $ 15,612 $ 444 $ 15,139 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions — $ 423 — $ 423 Derivative liabilities: Interest rate — 644 — 644 Foreign exchange $ 77 4 — 81 Commodity — 594 — 594 Credit — 6 $ 1 7 Derivative liabilities 77 1,248 1 1,326 Netting adjustments (a) — — — (542 ) Total derivative liabilities 77 1,248 1 784 Accrued expense and other liabilities — — — — Total liabilities on a recurring basis at fair value $ 77 $ 1,671 $ 1 $ 1,207 (a) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts with a single counterparty on a net basis and to offset the net derivative position with the related cash collateral. Total derivative assets and liabilities include these netting adjustments. September 30, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Trading account assets: U.S. Treasury, agencies and corporations — $ 596 — $ 596 States and political subdivisions — 24 — 24 Collateralized mortgage obligations — — — — Other mortgage-backed securities — 186 — 186 Other securities $ 13 145 — 158 Total trading account securities 13 951 — 964 Commercial loans — 1 — 1 Total trading account assets 13 952 — 965 Securities available for sale: States and political subdivisions — 27 — 27 Collateralized mortgage obligations — 10,009 — 10,009 Other mortgage-backed securities — 2,177 — 2,177 Other securities 22 — $ 10 32 Total securities available for sale 22 12,213 10 12,245 Other investments: Principal investments: Direct — — 115 115 Indirect — — 353 353 Total principal investments — — 468 468 Equity and mezzanine investments: Direct — — — — Indirect — — 13 13 Total equity and mezzanine investments — — 13 13 Other — — 4 4 Total other investments — — 485 485 Derivative assets: Interest rate — 827 19 846 Foreign exchange 73 8 — 81 Commodity — 95 — 95 Credit — 1 3 4 Derivative assets 73 931 22 1,026 Netting adjustments (a) — — — (613 ) Total derivative assets 73 931 22 413 Accrued income and other assets — — — — Total assets on a recurring basis at fair value $ 108 $ 14,096 $ 517 $ 14,108 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions $ 6 $ 490 — $ 496 Derivative liabilities: Interest rate — 616 — 616 Foreign exchange 55 9 — 64 Commodity — 89 $ 1 90 Credit — 7 — 7 Derivative liabilities 55 721 1 777 Netting adjustments (a) — — — (393 ) Total derivative liabilities 55 721 1 384 Accrued expense and other liabilities — — — — Total liabilities on a recurring basis at fair value $ 61 $ 1,211 $ 1 $ 880 (a) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts with a single counterparty on a net basis and to offset the net derivative position with the related cash collateral. Total derivative assets and liabilities include these netting adjustments. Changes in Level 3 Fair Value Measurements The following table shows the change in the fair values of our Level 3 financial instruments for the three and nine months ended September 30, 2015, and September 30, 2014. We mitigate the credit risk, interest rate risk, and risk of loss related to many of these Level 3 instruments by using securities and derivative positions classified as Level 1 or Level 2. Level 1 and Level 2 instruments are not included in the following table. Therefore, the gains or losses shown do not include the impact of our risk management activities. in millions Beginning Gains (Losses) Earnings Purchases Sales Settlements Transfers (d) Transfers (d) End of (f) Unrealized Nine months ended September 30, 2015 Securities available for sale Other securities $ 10 — $ 7 — — — — $ 17 — Other investments Principal investments Direct 102 $ 20 (b) 5 $ (61 ) — — — 66 — Indirect 302 33 (b) 6 (70 ) — — — 271 $ (23 ) (b) Equity and mezzanine investments Direct — 2 (b) — (2 ) — — — — 2 (b) Indirect 10 6 (b) — (7 ) — — — 9 6 (b) Other 4 — — — — — — 4 — Derivative instruments (a) Interest rate 13 5 (c) 1 — — $ 10 (e) $ (7 ) (e) 22 — Commodity — — — — — — — — — Credit 2 (7 ) (c) — 8 — — — 3 — Three months ended September 30, 2015 Securities available for sale Other securities $ 10 — $ 7 — — — — $ 17 — Other investments Principal investments Direct 70 $ 4 (b) 3 $ (11 ) — — — 66 $ 3 (b) Indirect 282 8 (b) 2 (21 ) — — — 271 (8 ) (b) Equity and mezzanine investments Direct — — — — — — — — — Indirect 9 — — — — — — 9 — Other 4 — — — — — — 4 — Derivative instruments (a) Interest rate 16 6 (c) — — — $ 2 (e) $ (2 ) (e) 22 — Commodity — — — — — — — — — Credit 3 (3 ) (c) — 8 $ (5 ) — — 3 — in millions Beginning Gains (Losses) Earnings Purchases Sales Settlements Transfers into Level 3 (d) Transfers (d) End of (f) Unrealized Nine months ended September 30, 2014 Securities available for sale Other securities — — $ 10 — — — — $ 10 — Other investments Principal investments Direct $ 141 $ 9 (b) 1 $ (36 ) — — — 115 $ 18 (b) Indirect 413 49 (b) 8 (117 ) — — — 353 8 (b) Equity and mezzanine investments Direct — — — — — — — — — Indirect 23 (1 ) (b) — (9 ) — — — 13 (1 ) (b) Other 4 — — — — — — 4 — Derivative instruments (a) Interest rate 25 2 (c) 3 (2 ) — $ 7 (e) $ (16 ) (e) 19 — Commodity — — (1 ) — — 1 (e) (1 ) (e) (1 ) — Credit 3 (7 ) (c) — — $ 7 — — 3 — Three months ended September 30, 2014 Securities available for sale Other securities — — $ 10 — — — — $ 10 — Other investments Principal investments Direct $ 146 $ (2 ) (b) — $ (29 ) — — — 115 $ (2 ) (b) Indirect 399 9 (b) 3 (58 ) — — — 353 (4 ) (b) Equity and mezzanine investments Direct — — — — — — — — — Indirect 16 — — (3 ) — — — 13 — Other 4 — — — — — — 4 — Derivative instruments (a) Interest rate 20 — — — — $ 2 (e) $ (3 ) (e) 19 — Commodity 1 — (1 ) — — — (1 ) (e) (1 ) — Credit 3 (2 ) (c) — — $ 2 — — 3 — (a) Amounts represent Level 3 derivative assets less Level 3 derivative liabilities. (b) Realized and unrealized gains and losses on principal investments are reported in “net gains (losses) from principal investing” on the income statement. Realized and unrealized losses on other and private equity and mezzanine investments are reported in “other income” on the income statement. (c) Realized and unrealized gains and losses on derivative instruments are reported in “corporate services income” and “other income” on the income statement. (d) Our policy is to recognize transfers into and transfers out of Level 3 as of the end of the reporting period. (e) Certain derivatives previously classified as Level 2 were transferred to Level 3 because Level 3 unobservable inputs became significant. Certain derivatives previously classified as Level 3 were transferred to Level 2 because Level 3 unobservable inputs became less significant. (f) There were no issuances for the nine-month periods ended September 30, 2015, and September 30, 2014. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Certain assets and liabilities are measured at fair value on a nonrecurring basis in accordance with GAAP. The adjustments to fair value generally result from the application of accounting guidance that requires assets and liabilities to be recorded at the lower of cost or fair value, or assessed for impairment. There were no liabilities measured at fair value on a nonrecurring basis at September 30, 2015, December 31, 2014, and September 30, 2014. The following table presents our assets measured at fair value on a nonrecurring basis at September 30, 2015, December 31, 2014, and Sept

Securities

Securities	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Securities	Securities available for sale. “Other securities” held in the available-for-sale portfolio consist of marketable equity securities that are traded on a public exchange such as the NYSE or NASDAQ and convertible preferred stock of a privately held company. Held-to-maturity securities. “Other securities” held in the held-to-maturity portfolio consist of foreign bonds and capital securities. Unrealized losses on equity securities deemed to be “other-than-temporary,” and realized gains and losses resulting from sales of securities using the specific identification method, are included in “other income” on the income statement. Unrealized losses on debt securities deemed to be “other-than-temporary” are included in “other income” on the income statement or in AOCI on the balance sheet in accordance with the applicable accounting guidance related to the recognition of OTTI of debt securities. The amortized cost, unrealized gains and losses, and approximate fair value of our securities available for sale and held-to-maturity securities are presented in the following tables. Gross unrealized gains and losses represent the difference between the amortized cost and the fair value of securities on the balance sheet as of the dates indicated. Accordingly, the amount of these gains and losses may change in the future as market conditions change. September 30, 2015 in millions Amortized Gross Gross Fair SECURITIES AVAILABLE FOR SALE States and political subdivisions $ 14 $ 1 — $ 15 Collateralized mortgage obligations 11,938 127 $ 62 12,003 Other mortgage-backed securities 2,309 22 1 2,330 Other securities 27 1 — 28 Total securities available for sale $ 14,288 $ 151 $ 63 $ 14,376 HELD-TO-MATURITY SECURITIES Collateralized mortgage obligations $ 4,299 $ 24 23 $ 4,300 Other mortgage-backed securities 617 3 — 620 Other securities 20 — — 20 Total held-to-maturity securities $ 4,936 $ 27 $ 23 $ 4,940 December 31, 2014 in millions Amortized Gross Gross Fair SECURITIES AVAILABLE FOR SALE States and political subdivisions $ 22 $ 1 — $ 23 Collateralized mortgage obligations 11,310 96 $ 136 11,270 Other mortgage-backed securities 2,004 32 1 2,035 Other securities 29 3 — 32 Total securities available for sale $ 13,365 $ 132 $ 137 $ 13,360 HELD-TO-MATURITY SECURITIES Collateralized mortgage obligations $ 4,755 $ 15 $ 57 $ 4,713 Other mortgage-backed securities 240 1 — 241 Other securities 20 — — 20 Total held-to-maturity securities $ 5,015 $ 16 $ 57 $ 4,974 September 30, 2014 in millions Amortized Gross Gross Fair SECURITIES AVAILABLE FOR SALE States and political subdivisions $ 26 $ 1 — $ 27 Collateralized mortgage obligations 10,096 109 $ 196 10,009 Other mortgage-backed securities 2,156 24 3 2,177 Other securities 28 4 — 32 Total securities available for sale $ 12,306 $ 138 $ 199 $ 12,245 HELD-TO-MATURITY SECURITIES Collateralized mortgage obligations $ 4,977 $ 10 $ 96 $ 4,891 Other securities 20 — — 20 Total held-to-maturity securities $ 4,997 $ 10 $ 96 $ 4,911 The following table summarizes our securities that were in an unrealized loss position as of September 30, 2015, December 31, 2014, and September 30, 2014. Duration of Unrealized Loss Position Less than 12 Months 12 Months or Longer Total in millions Fair Value Gross Fair Gross Fair Value Gross September 30, 2015 Securities available for sale: Collateralized mortgage obligations $ 770 $ 3 $ 3,348 $ 59 $ 4,118 $ 62 Other mortgage-backed securities 420 1 — — 420 1 Other securities (a) 2 — 3 — 5 — Held-to-maturity: Collateralized mortgage obligations 214 1 1,355 22 1,569 23 Other mortgage-backed securities 110 — — — 110 — Other securities (b) 4 — — — 4 — Total temporarily impaired securities $ 1,520 $ 5 $ 4,706 $ 81 $ 6,226 $ 86 December 31, 2014 Securities available for sale: Collateralized mortgage obligations $ 3,019 $ 52 $ 2,932 $ 84 $ 5,951 $ 136 Other mortgage-backed securities — — 78 1 78 1 Other securities (a) 4 — 2 — 6 — Held-to-maturity: Collateralized mortgage obligations 1,005 11 1,994 46 2,999 57 Total temporarily impaired securities $ 4,028 $ 63 $ 5,006 $ 131 $ 9,034 $ 194 September 30, 2014 Securities available for sale: Collateralized mortgage obligations $ 605 $ 7 $ 4,379 $ 189 $ 4,984 $ 196 Other mortgage-backed securities 811 1 81 2 892 3 Other securities (a) 1 — 2 — 3 — Held-to-maturity: Collateralized mortgage obligations 1,288 13 2,342 83 3,630 96 Total temporarily impaired securities $ 2,705 $ 21 $ 6,804 $ 274 $ 9,509 $ 295 (a) Gross unrealized losses totaled less than $1 million for other securities available for sale as of September 30, 2015, December 31, 2014, and September 30, 2014. (b) Gross unrealized losses totaled less than $1 million for other securities held-to-maturity as of September 30, 2015. At September 30, 2015, we had $62 million of gross unrealized losses related to 56 fixed-rate CMOs that we invested in as part of our overall A/LM strategy. These securities had a weighted-average maturity of 4.2 years at September 30, 2015. We also had $1 million of gross unrealized losses related to 17 other mortgage-backed securities positions, which had a weighted-average maturity of 5.2 years at September 30, 2015. Because these securities have a fixed interest rate, their fair value is sensitive to movements in market interest rates. These unrealized losses are considered temporary since we expect to collect all contractually due amounts from these securities. Accordingly, these investments were reduced to their fair value through OCI, not earnings. We regularly assess our securities portfolio for OTTI. The assessments are based on the nature of the securities, the underlying collateral, the financial condition of the issuer, the extent and duration of the loss, our intent related to the individual securities, and the likelihood that we will have to sell securities prior to expected recovery. The debt securities identified as other-than-temporarily impaired are written down to their current fair value. For those debt securities that we intend to sell, or more-likely-than-not will be required to sell, prior to the expected recovery of the amortized cost, the entire impairment (i.e., the difference between amortized cost and the fair value) is recognized in earnings. For those debt securities that we do not intend to sell, or more-likely-than-not will not be required to sell, prior to expected recovery, the credit portion of OTTI is recognized in earnings, while the remaining OTTI is recognized in equity as a component of AOCI on the balance sheet. As shown in the following table, we did not have any impairment losses recognized in earnings for the three months ended September 30, 2015. Three months ended September 30, 2015 in millions Balance at June 30, 2015 $ 4 Impairment recognized in earnings — Balance at September 30, 2015 $ 4 Realized gains and losses related to securities available for sale were as follows: Nine months ended September 30, 2015 in millions Realized gains — Realized losses $ 1 Net securities gains (losses) $ (1 ) At September 30, 2015, securities available for sale and held-to-maturity securities totaling $6.5 billion were pledged to secure securities sold under repurchase agreements, to secure public and trust deposits, to facilitate access to secured funding, and for other purposes required or permitted by law. The following table shows securities by remaining maturity. CMOs and other mortgage-backed securities (both of which are included in the securities available-for-sale portfolio) as well as the CMOs in the held-to-maturity portfolio are presented based on their expected average lives. The remaining securities, in both the available-for-sale and held-to-maturity portfolios, are presented based on their remaining contractual maturity. Actual maturities may differ from expected or contractual maturities since borrowers have the right to prepay obligations with or without prepayment penalties. Securities Available for Sale Held-to-Maturity September 30, 2015 in millions Amortized Fair Amortized Fair Due in one year or less $ 297 $ 302 $ 9 $ 9 Due after one through five years 12,659 12,735 4,310 4,311 Due after five through ten years 1,329 1,336 617 620 Due after ten years 3 3 — — Total $ 14,288 $ 14,376 $ 4,936 $ 4,940

Derivatives and Hedging Activit

Derivatives and Hedging Activities	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	We are a party to various derivative instruments, mainly through our subsidiary, KeyBank. Derivative instruments are contracts between two or more parties that have a notional amount and an underlying variable, require a small or no net investment, and allow for the net settlement of positions. A derivative’s notional amount serves as the basis for the payment provision of the contract, and takes the form of units, such as shares or dollars. A derivative’s underlying variable is a specified interest rate, security price, commodity price, foreign exchange rate, index, or other variable. The interaction between the notional amount and the underlying variable determines the number of units to be exchanged between the parties and influences the fair value of the derivative contract. The primary derivatives that we use are interest rate swaps, caps, floors, and futures; foreign exchange contracts; commodity derivatives; and credit derivatives. Generally, these instruments help us manage exposure to interest rate risk, mitigate the credit risk inherent in the loan portfolio, hedge against changes in foreign currency exchange rates, and meet client financing and hedging needs. As further discussed in this note: • interest rate risk represents the possibility that the EVE or net interest income will be adversely affected by fluctuations in interest rates; • credit risk is the risk of loss arising from an obligor’s inability or failure to meet contractual payment or performance terms; and • foreign exchange risk is the risk that an exchange rate will adversely affect the fair value of a financial instrument. Derivative assets and liabilities are recorded at fair value on the balance sheet, after taking into account the effects of bilateral collateral and master netting agreements. These agreements allow us to settle all derivative contracts held with a single counterparty on a net basis, and to offset net derivative positions with related cash collateral, where applicable. As a result, we could have derivative contracts with negative fair values included in derivative assets on the balance sheet and contracts with positive fair values included in derivative liabilities. At September 30, 2015, after taking into account the effects of bilateral collateral and master netting agreements, we had $157 million of derivative assets and a positive $34 million of derivative liabilities that relate to contracts entered into for hedging purposes. Our hedging derivative liabilities are in an asset position largely because we have contracts with positive fair values as a result of master netting agreements. As of the same date, after taking into account the effects of bilateral collateral and master netting agreements and a reserve for potential future losses, we had derivative assets of $636 million and derivative liabilities of $710 million that were not designated as hedging instruments. Additional information regarding our accounting policies for derivatives is provided in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Derivatives” beginning on page 121 of our 2014 Form 10-K. Derivatives Designated in Hedge Relationships Net interest income and the EVE change in response to changes in the mix of assets, liabilities, and off-balance sheet instruments; associated interest rates tied to each instrument; differences in the repricing and maturity characteristics of interest-earning assets and interest-bearing liabilities; and changes in interest rates. We utilize derivatives that have been designated as part of a hedge relationship in accordance with the applicable accounting guidance to minimize the exposure and volatility of net interest income and EVE to interest rate fluctuations. The primary derivative instruments used to manage interest rate risk are interest rate swaps, which convert the contractual interest rate index of agreed-upon amounts of assets and liabilities (i.e., notional amounts) to another interest rate index. We designate certain “receive fixed/pay variable” interest rate swaps as fair value hedges. These contracts convert certain fixed-rate long-term debt into variable-rate obligations, thereby modifying our exposure to changes in interest rates. As a result, we receive fixed-rate interest payments in exchange for making variable-rate payments over the lives of the contracts without exchanging the notional amounts. Similarly, we designate certain “receive fixed/pay variable” interest rate swaps as cash flow hedges. These contracts effectively convert certain floating-rate loans into fixed-rate loans to reduce the potential adverse effect of interest rate decreases on future interest income. Again, we receive fixed-rate interest payments in exchange for making variable-rate payments over the lives of the contracts without exchanging the notional amounts. We also designate certain “pay fixed/receive variable” interest rate swaps as cash flow hedges. These swaps convert certain floating-rate debt into fixed-rate debt. We also use these swaps to manage the interest rate risk associated with anticipated sales of certain commercial real estate loans. The swaps protect against the possible short-term decline in the value of the loans that could result from changes in interest rates between the time they are originated and the time they are sold. Interest rate swaps are also used to hedge the floating-rate debt that funds fixed-rate leases entered into by our equipment finance line of business. These swaps are designated as cash flow hedges to mitigate the interest rate mismatch between the fixed-rate lease cash flows and the floating-rate payments on the debt. These hedge relationships were terminated during the quarter ended March 31, 2014. We use foreign currency forward transactions to hedge the foreign currency exposure of our net investment in various foreign equipment finance entities. These entities are denominated in a non-U.S. currency. These swaps are designated as net investment hedges to mitigate the exposure of measuring the net investment at the spot foreign exchange rate. Derivatives Not Designated in Hedge Relationships On occasion, we enter into interest rate swap contracts to manage economic risks but do not designate the instruments in hedge relationships. Excluding contracts addressing customer exposures, the amount of derivatives hedging risks on an economic basis at September 30, 2015, was not significant. Like other financial services institutions, we originate loans and extend credit, both of which expose us to credit risk. We actively manage our overall loan portfolio and the associated credit risk in a manner consistent with asset quality objectives and concentration risk tolerances to mitigate portfolio credit risk. Purchasing credit default swaps enables us to transfer to a third party a portion of the credit risk associated with a particular extension of credit, including situations where there is a forecasted sale of loans. Beginning in the first quarter of 2014, we began purchasing credit default swaps to reduce the credit risk associated with the debt securities held in our trading portfolio. We may also sell credit derivatives to offset our purchased credit default swap position prior to maturity. Although we use credit default swaps for risk management purposes, they are not treated as hedging instruments. We also enter into derivative contracts for other purposes, including: • interest rate swap, cap, and floor contracts entered into generally to accommodate the needs of commercial loan clients; • energy and base metal swap and options contracts entered into to accommodate the needs of clients; • futures contracts and positions with third parties that are intended to offset or mitigate the interest rate or market risk related to client positions discussed above; and • foreign exchange forward contracts and options entered into primarily to accommodate the needs of clients. These contracts are not designated as part of hedge relationships. Fair Values, Volume of Activity, and Gain/Loss Information Related to Derivative Instruments The following table summarizes the fair values of our derivative instruments on a gross and net basis as of September 30, 2015, December 31, 2014, and September 30, 2014. The change in the notional amounts of these derivatives by type from December 31, 2014, to September 30, 2015, indicates the volume of our derivative transaction activity during the first nine months of 2015. The notional amounts are not affected by bilateral collateral and master netting agreements. The derivative asset and liability balances are presented on a gross basis, prior to the application of bilateral collateral and master netting agreements. Total derivative assets and liabilities are adjusted to take into account the impact of legally enforceable master netting agreements that allow us to settle all derivative contracts with a single counterparty on a net basis and to offset the net derivative position with the related cash collateral. Where master netting agreements are not in effect or are not enforceable under bankruptcy laws, we do not adjust those derivative assets and liabilities with counterparties. Securities collateral related to legally enforceable master netting agreements is not offset on the balance sheet. Our derivative instruments are included in “derivative assets” or “derivative liabilities” on the balance sheet, as indicated in the following table: September 30, 2015 December 31, 2014 September 30, 2014 Fair Value Fair Value Fair Value Notional Derivative Derivative Notional Derivative Derivative Notional Derivative Derivative in millions Amount Assets Liabilities Amount Assets Liabilities Amount Assets Liabilities Derivatives designated as hedging instruments: Interest rate $ 17,910 $ 394 $ 12 $ 15,095 $ 272 $ 26 $ 13,946 $ 237 $ 44 Foreign exchange 319 11 — 371 8 — 413 13 — Total 18,229 405 12 15,466 280 26 14,359 250 44 Derivatives not designated as hedging instruments: Interest rate 57,006 725 644 43,771 665 618 42,088 608 572 Foreign exchange 6,161 119 112 4,024 85 81 4,433 69 64 Commodity 1,394 482 469 1,544 608 594 1,780 95 90 Credit 580 7 5 512 5 7 618 4 7 Total 65,141 1,333 1,230 49,851 1,363 1,300 48,919 776 733 Netting adjustments (a) — (945 ) (566 ) — (1,034 ) (542 ) — (613 ) (393 ) Net derivatives in the balance sheet 83,370 793 676 65,317 609 784 63,278 413 384 Other collateral (b) — (113 ) (232 ) — (155 ) (241 ) — (71 ) (268 ) Net derivative amounts $ 83,370 $ 680 $ 444 $ 65,317 $ 454 $ 543 $ 63,278 $ 342 $ 116 (a) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. (b) Other collateral represents the amount that cannot be used to offset our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. The other collateral consists of securities and is exchanged under bilateral collateral and master netting agreements that allow us to offset the net derivative position with the related collateral. The application of the other collateral cannot reduce the net derivative position below zero. Therefore, excess other collateral, if any, is not reflected above. Fair value hedges. The following table summarizes the pre-tax net gains (losses) on our fair value hedges for the nine-month periods ended September 30, 2015, and September 30, 2014, and where they are recorded on the income statement. Nine months ended September 30, 2015 Net Gains Net Gains Income Statement Location of (Losses) on Income Statement Location of (Losses) on in millions Net Gains (Losses) on Derivative Derivative Hedged Item Net Gains (Losses) on Hedged Item Hedged Item Interest rate Other income $ 66 Long-term debt Other income $ (66 ) (a) Interest rate Interest expense – Long-term debt 91 Total $ 157 $ (66 ) Nine months ended September 30, 2014 Net Gains Net Gains Income Statement Location of (Losses) on Income Statement Location of (Losses) on in millions Net Gains (Losses) on Derivative Derivative Hedged Item Net Gains (Losses) on Hedged Item Hedged Item Interest rate Other income $ (21 ) Long-term debt Other income $ 21 (a) Interest rate Interest expense – Long-term debt 91 Total $ 70 $ 21 (a) Net gains (losses) on hedged items represent the change in fair value caused by fluctuations in interest rates. Cash flow hedges. Considering the interest rates, yield curves, and notional amounts as of September 30, 2015, we would expect to reclassify an estimated $37 million of after-tax net losses on derivative instruments from AOCI to income during the next 12 months for our cash flow hedges. In addition, we expect to reclassify approximately $1 million of net losses related to terminated cash flow hedges from AOCI to income during the next 12 months. As of September 30, 2015, the maximum length of time over which we hedge forecasted transactions is 13 years. Net investment hedges. The following table summarizes the pre-tax net gains (losses) on our cash flow and net investment hedges for the nine-month periods ended September 30, 2015, and September 30, 2014, and where they are recorded on the income statement. The table includes the effective portion of net gains (losses) recognized in OCI during the period, the effective portion of net gains (losses) reclassified from OCI into income during the current period, and the portion of net gains (losses) recognized directly in income, representing the amount of hedge ineffectiveness. Nine months ended September 30, 2015 in millions Net Gains (Losses) Income Statement Net Gains (Effective Portion) Income Statement (Ineffective Portion) Net Gains Cash Flow Hedges Interest rate $ 147 Interest income – Loans $ 73 Other income — Interest rate (3 ) Interest expense – Long-term debt (3 ) Other income — Interest rate (3 ) Investment banking and debt placement fees — Other income — Net Investment Hedges Foreign exchange contracts 29 Other Income — Other income — Total $ 170 $ 70 — Nine months ended September 30, 2014 in millions Net Gains (Losses) Income Statement Net Gains (Losses) Reclassified Income Statement Income Net Gains Cash Flow Hedges Interest rate $ 27 Interest income – Loans $ 49 Other income — Interest rate (5 ) Interest expense – Long-term debt (3 ) Other income — Interest rate (1 ) Investment banking and debt placement fees — Other income — Net Investment Hedges Foreign exchange contracts 17 Other Income — Other income — Total $ 38 $ 46 — The after-tax change in AOCI resulting from cash flow and net investment hedges is as follows: in millions December 31, 2015 Hedging Activity Reclassification September 30, AOCI resulting from cash flow and net investment hedges $ (8 ) $ 107 $ (44 ) $ 55 Nonhedging instruments. The following table summarizes the pre-tax net gains (losses) on our derivatives that are not designated as hedging instruments for the nine-month periods ended September 30, 2015, and September 30, 2014, and where they are recorded on the income statement. Nine months ended September 30, 2015 Nine months ended September 30, 2014 Corporate Corporate Services Other Services Other in millions Income Income Total Income Income Total NET GAINS (LOSSES) Interest rate $ 18 — $ 18 $ 11 — $ 11 Foreign exchange 27 — 27 25 — 25 Commodity 5 — 5 3 — 3 Credit — $ (10 ) (10 ) — $ (16 ) (16 ) Total net gains (losses) $ 50 $ (10 ) $ 40 $ 39 $ (16 ) $ 23 Counterparty Credit Risk Like other financial instruments, derivatives contain an element of credit risk. This risk is measured as the expected positive replacement value of the contracts. We use several means to mitigate and manage exposure to credit risk on derivative contracts. We generally enter into bilateral collateral and master netting agreements that provide for the net settlement of all contracts with a single counterparty in the event of default. Additionally, we monitor counterparty credit risk exposure on each contract to determine appropriate limits on our total credit exposure across all product types. We review our collateral positions on a daily basis and exchange collateral with our counterparties in accordance with standard ISDA documentation, central clearing rules, and other related agreements. We generally hold collateral in the form of cash and highly rated securities issued by the U.S. Treasury, government-sponsored enterprises, or GNMA. The cash collateral netted against derivative assets on the balance sheet totaled $394 million at September 30, 2015, $518 million at December 31, 2014, and $230 million at September 30, 2014. The cash collateral netted against derivative liabilities totaled $14 million at September 30, 2015, $26 million at December 31, 2014, and $10 million at September 30, 2014. The relevant agreements that allow us to access the central clearing organizations to clear derivative transactions are not considered to be qualified master netting agreements. Therefore, we cannot net derivative contracts or offset those contracts with related cash collateral with these counterparties. At September 30, 2015, we posted $112 million of cash collateral with clearing organizations and held $105 million of cash collateral from clearing organizations. At December 31, 2014, we posted $56 million of cash collateral with clearing organizations and did not hold any cash collateral from clearing organizations. At September 30, 2014, we posted $51 million of cash collateral with clearing organizations and did not hold any cash collateral from clearing organizations. This additional cash collateral is included in “accrued income and other assets” and “accrued expense and other liabilities” on the balance sheet. The following table summarizes our largest exposure to an individual counterparty at the dates indicated. in millions September 30, December 31, September 30, Largest gross exposure (derivative asset) to an individual counterparty $ 137 $ 133 $ 106 Collateral posted by this counterparty 55 100 44 Derivative liability with this counterparty 78 31 103 Collateral pledged to this counterparty — — 47 Net exposure after netting adjustments and collateral 4 2 6 The following table summarizes the fair value of our derivative assets by type at the dates indicated. These assets represent our gross exposure to potential loss after taking into account the effects of bilateral collateral and master netting agreements and other means used to mitigate risk. in millions September 30, December 31, September 30, Interest rate $ 807 $ 607 $ 556 Foreign exchange 48 41 39 Commodity 328 478 47 Credit 4 1 1 Derivative assets before collateral 1,187 1,127 643 Less: Related collateral 394 518 230 Total derivative assets $ 793 $ 609 $ 413 We enter into derivative transactions with two primary groups: broker-dealers and banks, and clients. Since these groups have different economic characteristics, we have different methods for managing counterparty credit exposure and credit risk. We enter into transactions with broker-dealers and banks for various risk management purposes. These types of transactions generally are high dollar volume. We generally enter into bilateral collateral and master netting agreements with these counterparties. We began clearing certain types of derivative transactions with these counterparties in June 2013, whereby the central clearing organizations become our counterparties subsequent to novation of the original derivative contracts. In addition, we began entering into derivative contracts through swap execution facilities during the quarter ended March 31, 2014. The swap clearing and swap trade execution requirements were mandated by the Dodd-Frank Act for the purpose of reducing counterparty credit risk and increasing transparency in the derivative market. At September 30, 2015, we had gross exposure of $952 million to broker-dealers and banks. We had net exposure of $303 million after the application of master netting agreements and cash collateral, where such qualifying agreements exist. We had net exposure of $172 million after considering $131 million of additional collateral held in the form of securities. We enter into transactions with clients to accommodate their business needs. These types of transactions generally are low dollar volume. We generally enter into master netting agreements with these counterparties. In addition, we mitigate our overall portfolio exposure and market risk by buying and selling U.S. Treasuries and Eurodollar futures, and entering into offsetting positions and other derivative contracts, sometimes with entities other than broker-dealers and banks. Due to the smaller size and magnitude of the individual contracts with clients, we generally do not exchange collateral in connection with these derivative transactions. To address the risk of default associated with the uncollateralized contracts, we have established a credit valuation adjustment (included in “derivative assets”) in the amount of $8 million at September 30, 2015, which we estimate to be the potential future losses on amounts due from client counterparties in the event of default. At September 30, 2015, we had gross exposure of $525 million to client counterparties and other entities that are not broker-dealers or banks for derivatives that have associated master netting agreements. We had net exposure of $490 million on our derivatives with these counterparties after the application of master netting agreements, collateral, and the related reserve. In addition, the derivatives for one counterparty were guaranteed by a third party with a letter of credit totaling $30 million. Credit Derivatives We are both a buyer and seller of credit protection through the credit derivative market. We purchase credit derivatives to manage the credit risk associated with specific commercial lending and swap obligations as well as exposures to debt securities. We may also sell credit derivatives, mainly single-name credit default swaps, to offset our purchased credit default swap position prior to maturity. The following table summarizes the fair value of our credit derivatives purchased and sold by type as of September 30, 2015, December 31, 2014, and September 30, 2014. The fair value of credit derivatives presented below does not take into account the effects of bilateral collateral or master netting agreements. September 30, 2015 December 31, 2014 September 30, 2014 in millions Purchased Sold Net Purchased Sold Net Purchased Sold Net Single-name credit default swaps $ (2 ) — $ (2 ) $ (3 ) — $ (3 ) $ (1 ) — $ (1 ) Traded credit default swap indices 4 — 4 1 — 1 (2 ) — (2 ) Other (a) — — — — — — — — — Total credit derivatives $ 2 — $ 2 $ (2 ) — $ (2 ) $ (3 ) — $ (3 ) (a) As of September 30, 2015, December 31, 2014, and September 30, 2014, the fair value of other credit derivatives sold totaled less than $1 million. Single-name credit default swaps are bilateral contracts whereby the seller agrees, for a premium, to provide protection against the credit risk of a specific entity (the “reference entity”) in connection with a specific debt obligation. The protected credit risk is related to adverse credit events, such as bankruptcy, failure to make payments, and acceleration or restructuring of obligations, identified in the credit derivative contract. As the seller of a single-name credit derivative, we may settle in one of two ways if the underlying reference entity experiences a predefined credit event. We may be required to pay the purchaser the difference between the par value and the market price of the debt obligation (cash settlement) or receive the specified referenced asset in exchange for payment of the par value (physical settlement). If we effect a physical settlement and receive our portion of the related debt obligation, we will join other creditors in the liquidation process, which may enable us to recover a portion of the amount paid under the credit default swap contract. We also may purchase offsetting credit derivatives for the same reference entity from third parties that will permit us to recover the amount we pay should a credit event occur. A traded credit default swap index represents a position on a basket or portfolio of reference entities. As a seller of protection on a credit default swap index, we would be required to pay the purchaser if one or more of the entities in the index had a credit event. Upon a credit event, the amount payable is based on the percentage of the notional amount allocated to the specific defaulting entity. The majority of transactions represented by the “other” category shown in the above table are risk participation agreements. In these transactions, the lead participant has a swap agreement with a customer. The lead participant (purchaser of protection) then enters into a risk participation agreement with a counterparty (seller of protection), under which the counterparty receives a fee to accept a portion of the lead participant’s credit risk. If the customer defaults on the swap contract, the counterparty to the risk participation agreement must reimburse the lead participant for the counterparty’s percentage of the positive fair value of the customer swap as of the default date. If the customer swap has a negative fair value, the counterparty has no reimbursement requirements. If the customer defaults on the swap contract and the seller fulfills its payment obligations under the risk participation agreement, the seller is entitled to a pro rata The following table provides information on the types of credit derivatives sold by us and held on the balance sheet at September 30, 2015, December 31, 2014, and September 30, 2014. The notional amount represents the maximum amount that the seller could be required to pay. The payment/performance risk assessment is based on the default probabilities for the underlying reference entities’ debt obligations using a Moody’s credit ratings matrix known as Moody’s “Idealized” Cumulative Default Rates. The payment/performance risk shown in the table represents a weighted-average of the default probabilities for all reference entities in the respective portfolios. These default probabilities are directly correlated to the probability that we will have to make a payment under the credit derivative contracts. September 30, 2015 December 31, 2014 September 30, 2014 Average Payment / Average Payment / Average Payment / Notional Term Performance Notional Term Performance Notional Term Performance dollars in millions Amount (Years) Risk Amount (Years) Risk Amount (Years) Risk Single-name credit default swaps — — — $ 5 .72 .87 % $ 5 .97 .87 % Other $ 9 2.95 7.45 % 6 2.89 9.58 6 2.92 5.59 Total credit derivatives sold $ 9 — — $ 11 — — $ 11 — — Credit Risk Contingent Features We have entered into certain derivative contracts that require us to post collateral to the counterparties when these contracts are in a net liability position. The amount of collateral to be posted is based on the amount of the net liability and thresholds generally related to our long-term senior unsecured credit ratings with Moody’s and S&P. Collateral requirements also are based on minimum transfer amounts, which are specific to each Credit Support Annex (a component of the ISDA Master Agreement) that we have signed with the counterparties. In a limited number of instances, counterparties have the right to terminate their ISDA Master Agreements with us if our ratings fall below a certain level, usually investment-grade level (i.e., “Baa3” for Moody’s and “BBB-” for S&P). At September 30, 2015, KeyBank’s rating was “A3” with Moody’s and “A-” with S&P, and KeyCorp’s rating was “Baa1” with Moody’s and “BBB+” with S&P. As of September 30, 2015, the aggregate fair value of all derivative contracts with credit risk contingent features (i.e., those containing collateral posting or termination provisions based on our ratings) held by KeyBank that were in a net liability position totaled $249 million, which includes $216 million in derivative assets and $465 million in derivative liabilities. We had $232 million in cash and securities collateral posted to cover those positions as of September 30, 2015. The aggregate fair value of all derivative contracts with credit risk contingent features held by KeyCorp as of September 30, 2015, that were in a net liability position totaled $8 million, which consists solely of derivative liabilities. We had $8 million in collateral posted to cover those positions as of September 30, 2015. The following table summarizes the additional cash and securities collateral that KeyBank would have been required to deliver under the ISDA Master Agreements had the credit risk contingent features been triggered for the derivative contracts in a net liability position as of September 30, 2015, December 31, 2014, and September 30, 2014. The additional collateral amounts were calculated based on scenarios under which KeyBank’s ratings are downgraded one, two, or three ratings as of September 30, 2015, December 31, 2014, and September 30, 2014, and take into account all collateral already posted. A similar calculation was performed for KeyCorp, and no additional collateral would have been required as of September 30, 2015, while additional collateral of less than $1 million as of December 31, 2014, and $3 million as of September 30, 2014, would have been required. For more information about the credit ratings for KeyBank and KeyCorp, see the discussion under the heading “Factors affecting liquidity” in the section entitled “Liquidity risk management” in Item 2 of this report. September 30, 2015 December 31, 2014 September 30, 2014 in millions Moody’s S&P Moody’s S&P Moody’s S&P KeyBank’s long-term senior unsecured credit ratings A3 A- A3 A- A3 A- One rating downgrade $ 4 $ 4 $ 1 $ 1 $ 1 $ 1 Two rating downgrades 5 5 1 1 4 4 Three rating downgrades 6 6 3 3 6 6 KeyBank’s long-term senior unsecured credit rating is currently four ratings above noninvestment grade at Moody’s and S&P. If KeyBank’s ratings had been downgraded below investment grade as of September 30, 2015, payments of up to $7 million would have been required to either terminate the contracts or post additional collateral for those contracts in a net liability position, taking into account all collateral already posted. If KeyCorp’s ratings had been downgraded below investment grade as of September 30, 2015, payments of less than $1 million would have been required to either terminate the contracts or post additional collateral for those contracts in a net liability position, taking into account all collateral already posted.

Mortgage Servicing Assets

Mortgage Servicing Assets	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Mortgage Servicing Assets	We originate and periodically sell commercial mortgage loans but continue to service those loans for the buyers. We also may purchase the right to service commercial mortgage loans for other lenders. We record a servicing asset if we purchase or retain the right to service loans in exchange for servicing fees that exceed the going market servicing rate and are considered more than adequate compensation for servicing. Changes in the carrying amount of mortgage servicing assets are summarized as follows: Nine months ended September 30, in millions 2015 2014 Balance at beginning of period $ 323 $ 332 Servicing retained from loan sales 39 19 Purchases 29 33 Amortization (71 ) (76 ) Balance at end of period $ 320 $ 308 Fair value at end of period $ 427 $ 370 The fair value of mortgage servicing assets is determined by calculating the present value of future cash flows associated with servicing the loans. This calculation uses a number of assumptions that are based on current market conditions. The range and weighted-average of the significant unobservable inputs used to fair value our mortgage servicing assets at September 30, 2015, and September 30, 2014, along with the valuation techniques, are shown in the following table: September 30, 2015 dollars in millions Valuation Technique Significant Unobservable Input Range (Weighted-Average) Mortgage servicing assets Discounted cash flow Prepayment speed 1.70 - 16.30% (4.90%) Expected defaults 1.00 - 3.00% (1.70%) Residual cash flows discount rate 7.00 - 15.00% (7.80%) Escrow earn rate 0.90 - 3.50% (2.30%) Servicing cost $150 - $2,719 ($1,151) Loan assumption rate 0.00 - 3.00% (1.37%) Percentage late 0.00 - 2.00% (0.33%) September 30, 2014 dollars in millions Valuation Technique Significant Unobservable Input Range (Weighted-Average) Mortgage servicing assets Discounted cash flow Prepayment speed 1.90 - 12.30% (5.90%) Expected defaults 1.00 - 3.00% (1.90%) Residual cash flows discount rate 7.00 - 14.10% (7.80%) Escrow earn rate 0.50 - 3.10% (1.70%) Servicing cost $150 - $2,700 ($1,053) Loan assumption rate 0.20 - 3.00% (1.52%) Percentage late 0.00 - 2.00% (0.32%) If these economic assumptions change or prove incorrect, the fair value of mortgage servicing assets may also change. Expected credit losses, escrow earn rates, and discount rates are critical to the valuation of servicing assets. Estimates of these assumptions are based on how a market participant would view the respective rates and reflect historical data associated with the loans, industry trends, and other considerations. Actual rates may differ from those estimated due to changes in a variety of economic factors. A decrease in the value assigned to the escrow earn rates would cause a decrease in the fair value of our mortgage servicing assets. An increase in the assumed default rates of commercial mortgage loans or an increase in the assigned discount rates would cause a decrease in the fair value of our mortgage servicing assets. Contractual fee income from servicing commercial mortgage loans totaled $33 million for the nine-month period ended September 30, 2015, and $35 million for the nine-month period ended September 30, 2014. We have elected to account for servicing assets using the amortization method. The amortization of servicing assets is determined in proportion to, and over the period of, the estimated net servicing income. The amortization of servicing assets for each period, as shown in the table at the beginning of this note, is recorded as a reduction to fee income. Both the contractual fee income and the amortization are recorded in “mortgage servicing fees” on the income statement. Additional information pertaining to the accounting for mortgage and other servicing assets is included in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Servicing Assets” on page 122 of our 2014 Form 10-K.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Variable Interest Entities	9. Variable Interest Entities A VIE is a partnership, limited liability company, trust, or other legal entity that meets any one of the following criteria: • The entity does not have sufficient equity to conduct its activities without additional subordinated financial support from another party. • The entity’s investors lack the power to direct the activities that most significantly impact the entity’s economic performance. • The entity’s equity at risk holders do not have the obligation to absorb losses or the right to receive residual returns. • The voting rights of some investors are not proportional to their economic interests in the entity, and substantially all of the entity’s activities involve, or are conducted on behalf of, investors with disproportionately few voting rights. Our significant VIEs are summarized below. We define a “significant interest” in a VIE as a subordinated interest that exposes us to a significant portion, but not the majority, of the VIE’s expected losses or residual returns, even though we do not have the power to direct the activities that most significantly impact the entity’s economic performance. On September 30, 2014, we sold the residual interests in all of our outstanding education loan securitization trusts and therefore no longer have a significant interest in those trusts. We deconsolidated the securitization trusts as of September 30, 2014, and removed the trust assets and liabilities from our balance sheet. Further information regarding these education loan securitization trusts is provided in Note 11 (“Acquisitions and Discontinued Operations”) under the heading “Education lending.” During the third quarter of 2015, we noted that not all liabilities related to our unconsolidated VIEs were captured in the table below. The amounts in the “Total Liabilities” column for our unconsolidated VIEs were revised to incorporate all liabilities for the periods ended December 31, 2014, and September 30, 2014. Consolidated VIEs Unconsolidated VIEs Total Total Total Total Maximum in millions Assets Liabilities Assets Liabilities Exposure to Loss September 30, 2015 LIHTC funds $ 1 $ 1 $ 26 $ 14 — LIHTC investments KCDC N/A N/A 834 271 $ 543 KAHC N/A N/A 260 231 14 December 31, 2014 LIHTC funds $ 1 $ 1 $ 55 $ 36 — LIHTC investments KCDC N/A N/A 764 258 $ 507 KAHC N/A N/A 470 462 14 September 30, 2014 LIHTC funds $ 1 $ 2 $ 55 $ 36 — LIHTC investments KCDC N/A N/A 775 263 $ 498 KAHC N/A N/A 470 462 9 Our involvement with VIEs is described below. Consolidated VIEs LIHTC guaranteed funds. We have not formed new guaranteed funds or added LIHTC partnerships since October 2003. However, we continue to act as asset manager and to provide occasional funding for existing funds under a guarantee obligation. As a result of this guarantee obligation, we have determined that we are the primary beneficiary of these guaranteed funds. Additional information on return guarantee agreements with LIHTC investors is presented in Note 15 (“Contingent Liabilities and Guarantees”) under the heading “Guarantees.” In accordance with the applicable accounting guidance for distinguishing liabilities from equity, third-party interests associated with our LIHTC guaranteed funds are considered mandatorily redeemable instruments and are recorded in “accrued expense and other liabilities” on the balance sheet. However, the FASB has indefinitely deferred the measurement and recognition provisions of this accounting guidance for mandatorily redeemable third-party interests associated with finite-lived subsidiaries, such as our LIHTC guaranteed funds. We adjust our financial statements each period for the third-party investors’ share of the guaranteed funds’ profits and losses. At September 30, 2015, we estimated the settlement value of these third-party interests to be between zero and $4 million, while the recorded value, including reserves, totaled $4 million. Information regarding our exposure to loss in connection with these guaranteed funds is included in Note 15 under the heading “Return guarantee agreement with LIHTC investors.” The partnership agreement for each of our guaranteed funds requires the fund to be dissolved by a certain date. Unconsolidated VIEs LIHTC nonguaranteed funds. LIHTC investments. Through KAHC, we have additional investments in unconsolidated LIHTC operating partnerships that are held by the consolidated LIHTC guaranteed funds. The tax credits and deductions associated with these properties are allocated to the funds’ investors based on their ownership percentages. We have determined that we are not the primary beneficiary of these partnerships because the general partners have the power to direct the activities that most significantly impact their economic performance and have the obligation to absorb expected losses and the right to receive residual returns. Our maximum exposure to loss in connection with these partnerships consists of our remaining investment balance. These investments are recorded in “other investments” on the balance sheet. Information regarding our exposure to loss in connection with these guaranteed funds is described above in the consolidated LIHTC guaranteed funds section and is also included in Note 15 under the heading “Return guarantee agreement with LIHTC investors.” We have not obtained any significant direct investments (either individually or in the aggregate) in LIHTC operating partnerships since September 2003. We amortize our LIHTC investments over the period that we expect to receive the tax benefits. During the first nine months of 2015, we recognized $85 million of amortization and $99 million of tax credits associated with these investments within income taxes on our income statement. During the first nine months of 2014, we recognized $72 million of amortization and $84 million of tax credits associated with these investments within income taxes on our income statement. We had $1 billion and $926 million of investments in LIHTC operating partnerships at September 30, 2015, and September 30, 2014, respectively. These investments are recorded in “accrued income and other assets” on our balance sheet. Commercial and residential real estate investments and principal investments.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Tax Provision In accordance with the applicable accounting guidance, the principal method established for computing the provision for income taxes in interim periods requires us to make our best estimate of the effective tax rate expected to be applicable for the full year. This estimated effective tax rate is then applied to interim consolidated pre-tax operating income to determine the interim provision for income taxes. The effective tax rate, which is the provision for income taxes as a percentage of income from continuing operations before income taxes, was 24.4% for the third quarter of 2015 and 24.1% for the third quarter of 2014. The effective tax rates are below our combined federal and state statutory tax rate of 37.2% primarily due to income from investments in tax-advantaged assets such as corporate-owned life insurance and credits associated with investments in low-income housing projects. Deferred Tax Asset At September 30, 2015, from continuing operations, we had a net federal deferred tax asset of $190 million and a net state deferred tax asset of $26 million, compared to a net federal deferred tax asset of $174 million and a net state deferred tax asset of $20 million at December 31, 2014, and a net federal deferred tax asset of $153 million and a net state deferred tax asset of $19 million at September 30, 2014, included in “accrued income and other assets” on the balance sheet. To determine the amount of deferred tax assets that are more-likely-than-not to be realized, and therefore recorded, we conduct a quarterly assessment of all available evidence. This evidence includes, but is not limited to, taxable income in prior periods, projected future taxable income, and projected future reversals of deferred tax items. These assessments involve a degree of subjectivity and may undergo change. Based on these criteria, we had a valuation allowance of less than $1 million at September 30, 2015, and at December 31, 2014, and $1 million at September 30, 2014, associated with certain state net operating loss carryforwards and state credit carryforwards. Unrecognized Tax Benefits As permitted under the applicable accounting guidance for income taxes, it is our policy to recognize interest and penalties related to unrecognized tax benefits in income tax expense. Deferred tax assets were reduced in the financial statements for unrecognized tax benefits by $2.8 million at September 30, 2015, and by $1 million at both December 31, 2014, and September 30, 2014.

Acquisitions and Discontinued O

Acquisitions and Discontinued Operations	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Acquisitions and Discontinued Operations	11. Acquisitions and Discontinued Operations Acquisitions Pacific Crest Securities. Discontinued operations Education lending. As of January 1, 2010, we consolidated our 10 outstanding education lending securitization trusts since we held the residual interests and are the master servicer with the power to direct the activities that most significantly influence the economic performance of the trusts. On September 30, 2014, we sold the residual interests in all of our outstanding education lending securitization trusts to a third party for $57 million. In selling the residual interests, we no longer have the obligation to absorb losses or the right to receive benefits related to the securitization trusts. Therefore, in accordance with the applicable accounting guidance, we deconsolidated the securitization trusts and removed trust assets of $1.7 billion and trust liabilities of $1.6 billion from our balance sheet at September 30, 2014. As part of the sale and deconsolidation, we recognized an after-tax loss of $25 million, which was recorded in “income (loss) from discontinued operations, net of tax” on our income statement. We continue to service the securitized loans in eight of the securitization trusts and receive servicing fees, whereby we are adequately compensated, as well as remain a counterparty to derivative contracts with three of the securitization trusts. We retained interests in the securitization trusts through our ownership of an insignificant percentage of certificates in two of the securitization trusts and two interest-only strips in one of the securitization trusts. These retained interests were remeasured at fair value on September 30, 2014, and their fair value of $1 million was recorded in “discontinued assets” on our balance sheet. These assets were valued using a similar approach and inputs that have been used to value the education loan securitization trust loans and securities, which are further discussed later in this note. “Income (loss) from discontinued operations, net of taxes” on the income statement includes (i) the changes in fair value of the assets and liabilities of the education loan securitization trusts, the loans at fair value in portfolio, and the loans held for sale at fair value in portfolio (discussed later in this note), and (ii) the interest income and expense from the loans and the securities of the trusts, the loans in portfolio, and the loans held for sale in portfolio at both amortized cost and fair value. These amounts are shown separately in the following table. Gains and losses attributable to changes in fair value are recorded as a component of “noninterest income” or “noninterest expense.” Interest income and interest expense related to the loans and securities are included as components of “net interest income.” The components of “income (loss) from discontinued operations, net of taxes” for the education lending business are as follows: Three months ended September 30, Nine months ended September 30, in millions 2015 2014 2015 2014 Net interest income $ 9 $ 21 $ 29 $ 67 Provision for credit losses 7 5 9 15 Net interest income after provision for credit losses 2 16 20 52 Noninterest income (2 ) (41 ) 1 (111 ) Noninterest expense 5 7 13 19 Income (loss) before income taxes (5 ) (32 ) 8 (78 ) Income taxes (2 ) (12 ) 3 (29 ) Income (loss) from discontinued operations, net of taxes (a) $ (3 ) $ (20 ) $ 5 $ (49 ) (a) Includes after-tax charges of $7 million and $9 million for the three-month periods ended September 30, 2015, and September 30, 2014, respectively, and $18 million and $26 million for the nine-month periods ended September 30, 2015, and September 30, 2014, respectively, determined by applying a matched funds transfer pricing methodology to the liabilities assumed necessary to support the discontinued operations. The discontinued assets of our education lending business included on the balance sheet are as follows. There were no discontinued liabilities for the periods presented below. September 30, December 31, September 30, in millions 2015 2014 2014 Held-to-maturity securities $ 1 $ 1 $ 1 Portfolio loans at fair value — 191 201 Loans, net of unearned income (a) 1,891 2,104 2,174 Less: Allowance for loan and lease losses 23 29 31 Net loans 1,868 2,266 2,344 Portfolio loans held for sale at fair value 169 — — Accrued income and other assets 33 38 40 Total assets $ 2,071 $ 2,305 $ 2,385 (a) At September 30, 2015, December 31, 2014, and September 30, 2014, unearned income was less than $1 million. The discontinued education lending business consisted of loans in portfolio (recorded at fair value) and loans in portfolio (recorded at carrying value with appropriate valuation reserves). As of June 30, 2015, we decided to sell the portfolio loans that are recorded at fair value, and these loans were reclassified to portfolio loans held for sale at fair value within discontinued operations. The assets and liabilities in the securitization trusts (recorded at fair value) were removed with the deconsolidation of the securitization trusts on September 30, 2014. At September 30, 2015, education loans included 1,845 TDRs with a recorded investment of approximately $20 million (pre-modification and post-modification). A specifically allocated allowance of $2 million was assigned to these loans as of September 30, 2015. There have been no significant payment defaults. There are no significant commitments outstanding to lend additional funds to these borrowers. Additional information regarding TDR classification and ALLL methodology is provided in Note 4 (“Asset Quality”). In the past, as part of our education lending business model, we originated and securitized education loans. The process of securitization involved taking a pool of loans from our balance sheet and selling them to a bankruptcy-remote qualifying special purpose entity, or trust. This trust then issued securities to investors in the capital markets to raise funds to pay for the loans. The cash flows generated from the loans pays holders of the securities issued. As the transferor, we retained a portion of the risk in the form of a residual interest and also retained the right to service the securitized loans and receive servicing fees. The trust assets can be used only to settle the obligations or securities the trusts issue; the assets cannot be sold and the liabilities cannot be transferred. The loans in the trusts consist of both private and government-guaranteed loans. The security holders or beneficial interest holders do not have recourse to Key. We no longer had economic interest or risk of loss associated with these education loan securitization trusts as of September 30, 2014, and therefore, the securitization trusts were deconsolidated. During the second quarter of 2014, additional market information became available. Based on this information and our related internal analysis, we adjusted certain assumptions related to valuing the loans in the securitization trusts. As a result, we recognized a net after-tax loss of $22 million during the second quarter of 2014 related to the fair value of the loans and securities in the securitization trusts. These losses resulted in a reduction in the value of our economic interest in these trusts. We record all income and expense (including fair value adjustments) through “income (loss) from discontinued operations, net of tax” on our income statement. On June 27, 2014, we purchased the private loans from one of the education loan securitization trusts through the execution of a clean-up call option. The trust used the cash proceeds from the sale of these loans to retire the outstanding securities related to these private loans, and there are no future commitments or obligations to the holders of the securities. The portfolio loans were valued using an internal discounted cash flow method, which was affected by assumptions for defaults, expected credit losses, discount rates, and prepayments. The portfolio loans are considered to be Level 3 assets since we rely on unobservable inputs when determining fair value. At September 30, 2015, there were loans held for sale with a contractual amount of $173 million that were previously purchased from three of the outstanding securitizations trusts pursuant to the legal terms of these particular trusts. These loans were transferred to held for sale in June 2015 and continue to be accounted for at fair value. As of September 30, 2015, the portfolio loans held for sale were valued based on indicative bids to sell the loans. These portfolio loans were previously valued using an internal discounted cash flow model, which was affected by assumptions for defaults, loss severity, discount rates, and prepayments. These loans are considered Level 3 assets since we rely on unobservable inputs when determining fair value. Our valuation process for these loans as well as the trust loans and securities is discussed in more detail below. Portfolio loans held for sale accounted for at fair value had a value of $169 million at September 30, 2015. On October 29, 2015, $117 million of these loans were sold. Portfolio loans accounted for at fair value had a value of $191 million at December 31, 2014, and $201 million at September 30, 2014. When we first consolidated the education loan securitization trusts, we made an election to record them at fair value. Carrying the assets and liabilities of the trusts at fair value better depicted our economic interest. The fair value of the assets and liabilities of the trusts was determined by calculating the present value of the future expected cash flows. We relied on unobservable inputs (Level 3) when determining the fair value of the assets and liabilities of the trusts because observable market data was not available. Our valuation process is described in more detail below. Corporate Treasury, within our Finance area, is responsible for the quarterly valuation process that previously determined the fair value of our student loans held in portfolio that were accounted for at fair value and for our loans and securities in our education loan securitization trusts. Corporate Treasury provided these fair values to a Working Group Committee (the “Working Group”) comprising representatives from the line of business, Credit and Market Risk Management, Accounting, Business Finance (part of our Finance area), and Corporate Treasury. The Working Group is a subcommittee of the Fair Value Committee that is discussed in more detail in Note 5 (“Fair Value Measurements”). The Working Group reviewed all significant inputs and assumptions and approved the resulting fair values. The Working Group reviewed actual performance trends of the loans on a quarterly basis and used statistical analysis and qualitative measures to determine assumptions for future performance. Predictive models that incorporate delinquency and charge-off trends along with economic outlooks assisted the Working Group to forecast future defaults. The Working Group used this information to formulate the credit outlook related to the loans. Higher projected defaults, fewer expected recoveries, elevated prepayment speeds, and higher discount rates would be expected to result in a lower fair value of the portfolio loans at fair value. Default expectations and discount rate changes had the most significant impact on the fair values of the loans. Increased cash flow uncertainty, whether through higher defaults and prepayments or fewer recoveries, can result in higher discount rates for use in the fair value process for these loans. This process was previously used in the valuation of the education loan securitization trust loans. The valuation process for the portfolio loans that were accounted for at fair value was based on a discounted cash flow analysis using a model purchased from a third party and maintained by Corporate Treasury. The valuation process began with loan-level data that was aggregated into pools based on underlying loan structural characteristics (i.e., current unpaid principal balance, contractual term, interest rate). Cash flows for these loan pools were developed using a financial model that reflected certain assumptions for defaults, recoveries, status changes, and prepayments. A net earnings stream, taking into account cost of funding, was calculated and discounted back to the measurement date using an appropriate discount rate. This resulting amount was used to determine the present value of the loans, which represented their fair value to a market participant. The unobservable inputs set forth in the following table are reviewed and approved by the Working Group on a quarterly basis. The Working Group determines these assumptions based on available data, discussions with appropriate individuals within and outside of Key, and the knowledge and experience of the Working Group members. A similar discounted cash flow approach to that described above was used on a quarterly basis by Corporate Treasury to determine the fair value of the trust securities. In valuing these securities, the discount rates used were provided by a third-party valuation consultant. These discount rates were based primarily on secondary market spread indices for similar student loans and asset-backed securities and were developed by the consultant using market-based data. On a quarterly basis, the Working Group reviewed the discount rate inputs used in the valuation process for reasonableness. A quarterly variance analysis reconciled valuation changes in the model used to calculate the fair value of the trust loans and securities and the portfolio loans at fair value. This quarterly analysis considered loan and securities run-off, yields, future default and recovery changes, and the timing of cash releases to us from the trusts. We also performed back-testing to compare expected defaults to actual experience; the impact of future defaults could significantly affect the fair value of these loans and securities over time. In addition, our internal model validation group periodically performed a review to ensure the accuracy and validity of the model for determining the fair value of these loans and securities. The following table shows the significant unobservable inputs used to measure the fair value of the portfolio loans held for sale and portfolio loans accounted for at fair value at September 30, 2015, December 31, 2014, and September 30, 2014: September 30, 2015 dollars in millions Fair Value of Level 3 Valuation Technique Significant Range Portfolio loans held for sale accounted for at fair value $ 169 Market approach Indicative bids 84.50 - 104.00% December 31, 2014 dollars in millions Fair Value of Level 3 Valuation Technique Significant Range (Weighted-Average) Portfolio loans accounted for at fair value $ 191 Discounted cash flow Prepayment speed 5.40 - 5.60% (5.50%) Loss severity 2.00 - 77.00% (25.66%) Discount rate 3.90 - 4.00% (3.92%) Default rate .86 - 1.70% (1.12%) September 30, 2014 dollars in millions Fair Value of Level 3 Valuation Technique Significant Range (Weighted-Average) Portfolio loans accounted for at fair value $ 201 Discounted cash flow Prepayment speed 5.00 - 5.80% (5.25%) Loss severity 2.00 - 77.00% (25.71%) Discount rate 3.60 - 3.90% (3.69%) Default rate .93 - 1.91% (1.24%) The following table shows the principal and fair value amounts for our portfolio loans held for sale at fair value, portfolio loans at carrying value, and portfolio loans at fair value at September 30, 2015, December 31, 2014, and September 30, 2014. Our policies for determining past due loans, placing loans on nonaccrual, applying payments on nonaccrual loans, and resuming accrual of interest are disclosed in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Nonperforming Loans” beginning on page 116 of our 2014 Form 10-K. September 30, 2015 December 31, 2014 September 30, 2014 in millions Principal Fair Value Principal Fair Value Principal Fair Value Portfolio loans held for sale at fair value Accruing loans past due 90 days or more $ 5 $ 4 — — — — Portfolio loans at carrying value Accruing loans past due 90 days or more $ 26 N/A $ 29 N/A $ 31 N/A Loans placed on nonaccrual status 8 N/A 11 N/A 9 N/A Portfolio loans at fair value Accruing loans past due 90 days or more — — $ 5 $ 5 $ 5 $ 5 The following table shows the portfolio loans held for sale at fair value and portfolio loans at fair value and their related contractual amounts at September 30, 2015, December 31, 2014, and September 30, 2014. September 30, 2015 December 31, 2014 September 30, 2014 in millions Contractual Fair Contractual Fair Contractual Fair ASSETS Portfolio loans held for sale $ 173 $ 169 — — — — Portfolio loans — — $ 192 $ 191 $ 199 $ 201 The following tables present the assets of the portfolio loans held for sale and portfolio loans measured at fair value on a recurring basis at September 30, 2015, December 31, 2014, and September 30, 2014. September 30, 2015 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Portfolio loans held for sale — — $ 169 $ 169 Total assets on a recurring basis at fair value — — $ 169 $ 169 December 31, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Portfolio loans — — $ 191 $ 191 Total assets on a recurring basis at fair value — — $ 191 $ 191 September 30, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Portfolio loans — — $ 201 $ 201 Total assets on a recurring basis at fair value — — $ 201 $ 201 The following table shows the change in the fair values of the Level 3 portfolio loans held for sale, portfolio loans, and consolidated education loan securitization trusts for the three- and nine-month periods ended September 30, 2015, and September 30, 2014. Portfolio Student Portfolio Trust Trust Trust Loans Held Student Student Other Trust Other in millions For Sale Loans Loans Assets Securities Liabilities Balance at December 31, 2014 — $ 191 — — — — Gains (losses) recognized in earnings (a) $ (4 ) 1 — — — — Settlements (6 ) (13 ) — — — — Loans transferred to held for sale 179 (179 ) — — — — Balance at September 30, 2015 (b) $ 169 — — — — — Balance at June 30, 2015 $ 179 — — — — — Gains (losses) recognized in earnings (a) (4 ) — — — — — Settlements (6 ) — — — — — Balance at September 30, 2015 (b) $ 169 — — — — — Balance at December 31, 2013 — $ 147 $ 1,960 $ 20 $ 1,834 $ 20 Gains (losses) recognized in earnings (a) — (4 ) (34 ) — 33 — Purchases — 74 — — — — Sales — — (74 ) — — — Settlements — (16 ) (202 ) (1 ) (278 ) (3 ) Transfers out due to deconsolidation — — (1,650 ) (19 ) (1,589 ) (17 ) Balance at September 30, 2014 (b) — $ 201 — — — — Balance at June 30, 2014 — $ 209 $ 1,711 $ 19 $ 1,660 $ 17 Gains (losses) recognized in earnings (a) — — — — — — Purchases — — — — — — Sales — — — — — — Settlements — (8 ) (61 ) — (71 ) — Transfers out due to deconsolidation — — (1,650 ) (19 ) (1,589 ) (17 ) Balance at September 30, 2014 (b) — $ 201 — — — — (a) Gains (losses) were driven primarily by fair value adjustments. (b) There were no issuances, transfers into Level 3, or transfers out of Level 3 for the three- and nine-month periods ended September 30, 2015. There were no issuances or transfers into Level 3 for the three- and nine-month periods ended September 30, 2014. Victory Capital Management and Victory Capital Advisors. The results of this discontinued business are included in “income (loss) from discontinued operations, net of taxes” on the income statement. The components of “income (loss) from discontinued operations, net of taxes” for Victory, which includes the additional gain recorded as of March 31, 2014, on the sale of this business, are as follows: Three months ended Nine months ended in millions 2015 2014 2015 2014 Net interest income — $ 5 — $ 7 Noninterest income — — — 10 Noninterest expense — — — — Income (loss) before income taxes — 5 — 17 Income taxes — 2 — 7 Income (loss) from discontinued operations, net of taxes — $ 3 — $ 10 The discontinued assets of Victory included on the balance sheet are as follows. There were no discontinued liabilities for the periods presented below. September 30, December 31, September 30, in millions 2015 2014 2014 Seller note (a) — — $ 17 Total assets — — $ 17 (a) At September 30, 2014, the only remaining asset of Victory was the Seller note. The Seller note was paid off during the fourth quarter of 2014. Austin Capital Management, Ltd. The results of this discontinued business are included in “income (loss) from discontinued operations, net of taxes” on the income statement. The components of “income (loss) from discontinued operations, net of taxes” for Austin are as follows: Three months ended September 30, Nine months ended in millions 2015 2014 2015 2014 Noninterest expense — — — $ 4 Income (loss) before income taxes — — — (4 ) Income taxes — — — (2 ) Income (loss) from discontinued operations, net of taxes — — — $ (2 ) The discontinued assets and liabilities of Austin included on the balance sheet are as follows: September 30, December 31, September 30, in millions 2015 2014 2014 Cash and due from banks $ 15 $ 19 $ 19 Total assets $ 15 $ 19 $ 19 Accrued expense and other liabilities — $ 3 $ 3 Total liabilities — $ 3 $ 3 Combined discontinued operations. Three months ended Nine months ended in millions 2015 2014 2015 2014 Net interest income $ 9 $ 26 $ 29 $ 74 Provision for credit losses 7 5 9 15 Net interest income after provision for credit losses 2 21 20 59 Noninterest income (2 ) (41 ) 1 (101 ) Noninterest expense 5 7 13 23 Income (loss) before income taxes (5 ) (27 ) 8 (65 ) Income taxes (2 ) (10 ) 3 (24 ) Income (loss) from discontinued operations, net of taxes (a) $ (3 ) $ (17 ) $ 5 $ (41 ) (a) Includes after-tax charges of $7 million and $9 million for the three-month periods ended September 30, 2015, and September 30, 2014, respectively, and $18 million and $26 million for the nine-month periods ended September 30, 2015, and September 30, 2014, respectively, determined by applying a matched funds transfer pricing methodology to the liabilities assumed necessary to support the discontinued operations. The combined assets and liabilities of the discontinued operations are as follows: September 30, December 31, September 30, in millions 2015 2014 2014 Cash and due from banks $ 15 $ 19 $ 19 Held-to-maturity securities 1 1 1 Seller note — — 17 Portfolio loans at fair value — 191 201 Loans, net of unearned income (a) 1,891 2,104 2,174 Less: Allowance for loan and lease losses 23 29 31 Net loans 1,868 2,266 2,344 Portfolio loans held for sale at fair value 169 — — Accrued income and other assets 33 38 40 Total assets $ 2,086 $ 2,324 $ 2,421 Accrued expense and other liabilities — $ 3 $ 3 Total liabilities — $ 3 $ 3 (a) At September 30, 2015, December 31, 2014, and September 30, 2014, unearned income was less than $1 million.

Securities Financing Activities

Securities Financing Activities	9 Months Ended
	Sep. 30, 2015
Brokers and Dealers [Abstract]
Securities Financing Activities	We enter into repurchase and reverse repurchase agreements and securities borrowed transactions (securities financing agreements) primarily to finance our inventory positions, acquire securities to cover short positions, and to settle other securities obligations. We account for these securities financing agreements as collateralized financing transactions. Repurchase and reverse repurchase agreements are recorded on the balance sheet at the amounts that the securities will be subsequently sold or repurchased. Securities borrowed transactions are recorded on the balance sheet at the amounts of cash collateral advanced. While our securities financing agreements incorporate a right of set off, the assets and liabilities are reported on a gross basis. Repurchase agreements and securities borrowed transactions are included in “short-term investments” on the balance sheet; reverse repurchase agreements are included in “federal funds purchased and securities sold under repurchase agreements.” During the third quarter of 2014, our broker-dealer subsidiary, KBCM, moved from a self-clearing organization to using a third-party organization for clearing purposes. In connection with this change, KBCM became an introducing broker-dealer, whereby it no longer needs to fund its business operations by entering into repurchase, reverse repurchase, or securities borrowed agreements. As a result, KBCM did not have any outstanding securities financing agreements at September 30, 2015, December 31, 2014, and September 30, 2014. The following table summarizes our securities financing agreements at September 30, 2015, December 31, 2014, and September 30, 2014: September 30, 2015 Gross Amount Presented in Netting Net in millions Balance Sheet Adjustments (a) Collateral (b) Amounts Offsetting of financial assets: Reverse repurchase agreements $ 4 $ (4 ) — — Total $ 4 $ (4 ) — — Offsetting of financial liabilities: Repurchase agreements (c) $ 6 $ (4 ) $ (2 ) — Total $ 6 $ (4 ) $ (2 ) — December 31, 2014 Gross Amount Presented in Netting Net in millions Balance Sheet Adjustments (a) Collateral (b) Amounts Offsetting of financial assets: Reverse repurchase agreements $ 3 $ (1 ) $ (2 ) — Total $ 3 $ (1 ) $ (2 ) — Offsetting of financial liabilities: Repurchase agreements $ 1 $ (1 ) — — Total $ 1 $ (1 ) — — September 30, 2014 Gross Amount Presented in Netting Net in millions Balance Sheet Adjustments (a) Collateral (b) Amounts Offsetting of financial assets: Reverse repurchase agreements $ 6 $ (4 ) $ (2 ) — Total $ 6 $ (4 ) $ (2 ) — Offsetting of financial liabilities: Repurchase agreements $ 4 $ (4 ) — — Total $ 4 $ (4 ) — — (a) Netting adjustments take into account the impact of master netting agreements that allow us to settle with a single counterparty on a net basis. (b) These adjustments take into account the impact of bilateral collateral agreements that allow us to offset the net positions with the related collateral. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above. (c) Repurchase agreements are collateralized by U.S. Treasury securities and contracted on an overnight basis. Like other financing transactions, securities financing agreements contain an element of credit risk. To mitigate and manage credit risk exposure, we generally enter into master netting agreements and other collateral arrangements that give us the right, in the event of default, to liquidate collateral held and to offset receivables and payables with the same counterparty. Additionally, we establish and monitor limits on our counterparty credit risk exposure by product type. For the reverse repurchase agreements, we monitor the value of the underlying securities we received from counterparties and either request additional collateral or return a portion of the collateral based on the value of those securities. We generally hold collateral in the form of highly rated securities issued by the U.S. Treasury and fixed income securities. In addition, we may need to provide collateral to counterparties under our repurchase agreements and securities borrowed transactions. In general, the collateral we pledge and receive can be sold or repledged by the secured parties.

Employee Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2015
Compensation and Retirement Disclosure [Abstract]
Employee Benefits	Pension Plans Effective December 31, 2009, we amended our cash balance pension plan and other defined benefit plans to freeze all benefit accruals and close the plans to new employees. We will continue to credit participants’ existing account balances for interest until they receive their plan benefits. We changed certain pension plan assumptions after freezing the plans. During the third quarters of 2015 and 2014, year-to-date lump sum payments made under certain pension plans triggered settlement accounting. In accordance with the applicable accounting guidance for defined benefit plans, we performed a remeasurement of the affected plans in conjunction with the settlement and recognized the settlement losses reflected in the following table. We will also recognize a settlement loss in the fourth quarter of 2015 related to additional lump sum payments made during the fourth quarter. The components of net pension cost (benefit) for all funded and unfunded plans are as follows: Three months ended Nine months ended in millions 2015 2014 2015 2014 Interest cost on PBO $ 10 $ 12 $ 30 $ 36 Expected return on plan assets (14 ) (17 ) (42 ) (51 ) Amortization of losses 4 4 13 12 Settlement loss 19 20 19 20 Net pension cost $ 19 $ 19 $ 20 $ 17 Other Postretirement Benefit Plans We sponsor a retiree healthcare plan that all employees age 55 with five years of service (or employees age 50 with 15 years of service who are terminated under conditions that entitle them to a severance benefit) are eligible to participate. Participant contributions are adjusted annually. We may provide a subsidy toward the cost of coverage for certain employees hired before 2001 with a minimum of 15 years of service at the time of termination. We use a separate VEBA trust to fund the retiree healthcare plan. The components of net postretirement benefit cost for all funded and unfunded plans are as follows: Three months ended Nine months ended in millions 2015 2014 2015 2014 Interest cost on APBO $ 1 $ 1 $ 3 $ 3 Expected return on plan assets (1 ) (1 ) (2 ) (3 ) Amortization of unrecognized prior service credit — — (1 ) — Net postretirement benefit cost — — — —

Trust Preferred Securities Issu

Trust Preferred Securities Issued by Unconsolidated Subsidiaries	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Trust Preferred Securities Issued by Unconsolidated Subsidiaries	We own the outstanding common stock of business trusts formed by us that issued corporation-obligated mandatorily redeemable trust preferred securities. The trusts used the proceeds from the issuance of their trust preferred securities and common stock to buy debentures issued by KeyCorp. These debentures are the trusts’ only assets; the interest payments from the debentures finance the distributions paid on the mandatorily redeemable trust preferred securities. We unconditionally guarantee the following payments or distributions on behalf of the trusts: • required distributions on the trust preferred securities; • the redemption price when a capital security is redeemed; and • the amounts due if a trust is liquidated or terminated. The Regulatory Capital Rules, discussed in “Supervision and regulation” in Item 2 of this report, implement a phase-out of trust preferred securities as Tier 1 capital, consistent with the requirements of the Dodd-Frank Act. For “standardized approach” banking organizations such as Key, the phase-out period began on January 1, 2015, and by 2016 will require us to treat our mandatorily redeemable trust preferred securities as Tier 2 capital. As of September 30, 2015, the trust preferred securities issued by the KeyCorp capital trusts represent $85 million, or .8%, of our total qualifying Tier 1 capital, net of goodwill. The trust preferred securities, common stock, and related debentures are summarized as follows: Principal Interest Rate Maturity Trust Preferred Amount of of Trust Preferred of Trust Preferred Securities, Common Debentures, Securities and Securities and dollars in millions Net of Discount (a) Stock Net of Discount (b) Debentures (c) Debentures September 30, 2015 KeyCorp Capital I $ 156 $ 6 $ 162 1.024 % 2028 KeyCorp Capital II 111 4 115 6.875 2029 KeyCorp Capital III 145 4 149 7.750 2029 Total $ 412 $ 14 $ 426 4.968 % — December 31, 2014 $ 408 $ 14 $ 422 4.926 % — September 30, 2014 $ 397 $ 14 $ 411 4.856 % — (a) The trust preferred securities must be redeemed when the related debentures mature, or earlier if provided in the governing indenture. Each issue of trust preferred securities carries an interest rate identical to that of the related debenture. Certain trust preferred securities include basis adjustments related to fair value hedges totaling $72 million at September 30, 2015, $68 million at December 31, 2014, and $57 million at September 30, 2014. See Note 7 (“Derivatives and Hedging Activities”) for an explanation of fair value hedges. (b) We have the right to redeem these debentures. If the debentures purchased by KeyCorp Capital I are redeemed before they mature, the redemption price will be the principal amount, plus any accrued but unpaid interest. If the debentures purchased by KeyCorp Capital II or KeyCorp Capital III are redeemed before they mature, the redemption price will be the greater of: (i) the principal amount, plus any accrued but unpaid interest, or (ii) the sum of the present values of principal and interest payments discounted at the Treasury Rate (as defined in the applicable indenture), plus 20 basis points for KeyCorp Capital II or 25 basis points for KeyCorp Capital III or 50 basis points in the case of redemption upon either a tax or a capital treatment event for either KeyCorp Capital II or KeyCorp Capital III, plus any accrued but unpaid interest. The principal amount of certain debentures includes basis adjustments related to fair value hedges totaling $72 million at September 30, 2015, $68 million at December 31, 2014, and $57 million at September 30, 2014. See Note 7 for an explanation of fair value hedges. The principal amount of debentures, net of discounts, is included in “long-term debt” on the balance sheet. (c) The interest rates for the trust preferred securities issued by KeyCorp Capital II and KeyCorp Capital III are fixed. KeyCorp Capital I has a floating interest rate, equal to three-month LIBOR plus 74 basis points, that reprices quarterly. The total interest rates are weighted-average rates.

Contingent Liabilities and Guar

Contingent Liabilities and Guarantees	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities and Guarantees	Legal Proceedings See Note 20 (“Commitments, Contingent Liabilities and Guarantees”) under the heading “Legal Proceedings” on page 206 of our 2014 Form 10-K for a description of a proceeding styled In Re: Checking Account Overdraft Litigation. Other litigation. Guarantees We are a guarantor in various agreements with third parties. The following table shows the types of guarantees that we had outstanding at September 30, 2015. Information pertaining to the basis for determining the liabilities recorded in connection with these guarantees is included in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Guarantees” beginning on page 124 of our 2014 Form 10-K. Maximum Potential September 30, 2015 Undiscounted Liability in millions Future Payments Recorded Financial guarantees: Standby letters of credit $ 11,498 $ 63 Recourse agreement with FNMA 1,747 4 Return guarantee agreement with LIHTC investors 4 4 Written put options (a) 2,131 117 Total $ 15,380 $ 188 (a) The maximum potential undiscounted future payments represent notional amounts of derivatives qualifying as guarantees. We determine the payment/performance risk associated with each type of guarantee described below based on the probability that we could be required to make the maximum potential undiscounted future payments shown in the preceding table. We use a scale of low (0% to 30% probability of payment), moderate (greater than 30% to 70% probability of payment), or high (greater than 70% probability of payment) to assess the payment/performance risk, and have determined that the payment/performance risk associated with each type of guarantee outstanding at September 30, 2015, is low. Standby letters of credit. Recourse agreement with FNMA. Return guarantee agreement with LIHTC investors. As shown in the previous table, KAHC maintained a reserve in the amount of $4 million at September 30, 2015, which is sufficient to cover estimated future obligations under the guarantees. The maximum exposure to loss reflected in the table represents undiscounted future payments due to investors for the return on and of their investments. These guarantees have expiration dates that extend through 2018, but KAHC has not formed any new partnerships under this program since October 2003. Additional information regarding these partnerships is included in Note 9 (“Variable Interest Entities”). Written put options. Written put options where the counterparty is a broker-dealer or bank are accounted for as derivatives at fair value but are not considered guarantees since these counterparties typically do not hold the underlying instruments. In addition, we are a purchaser and seller of credit derivatives, which are further discussed in Note 7. Default guarantees. Other Off-Balance Sheet Risk Other off-balance sheet risk stems from financial instruments that do not meet the definition of a guarantee as specified in the applicable accounting guidance, and from other relationships. Indemnifications provided in the ordinary course of business. Intercompany guarantees.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income	Our changes in AOCI for the three and nine months ended September 30, 2015, and September 30, 2014, are as follows: Unrealized gains Unrealized gains Foreign currency Net pension and (losses) on securities (losses) on derivative translation postretirement in millions available for sale financial instruments adjustment benefit costs Total Balance at December 31, 2014 $ (4 ) $ (8 ) $ 22 $ (366 ) $ (356 ) Other comprehensive income before reclassification, net of income taxes 57 107 (19 ) (38 ) 107 Amounts reclassified from accumulated other comprehensive income, net of income taxes (a) 1 (44 ) 1 19 (23 ) Net current-period other comprehensive income, net of income taxes 58 63 (18 ) (19 ) 84 Balance at September 30, 2015 54 $ 55 $ 4 $ (385 ) $ (272 ) Balance at June 30, 2015 — $ 7 $ 9 $ (361 ) $ (345 ) Other comprehensive income before reclassification, net of income taxes $ 54 65 (5 ) (38 ) 76 Amounts reclassified from accumulated other comprehensive income, net of income taxes (a) — (17 ) — 14 (3 ) Net current-period other comprehensive income, net of income taxes 54 48 (5 ) (24 ) 73 Balance at September 30, 2015 54 $ 55 $ 4 $ (385 ) $ (272 ) Balance at December 31, 2013 $ (63 ) $ (11 ) $ 42 $ (320 ) $ (352 ) Other comprehensive income before reclassification, net of income taxes 24 25 (9 ) — 40 Amounts reclassified from accumulated other comprehensive income, net of income taxes (a) — (29 ) (3 ) 19 (13 ) Net current-period other comprehensive income, net of income taxes 24 (4 ) (12 ) 19 27 Balance at September 30, 2014 $ (39 ) $ (15 ) $ 30 $ (301 ) $ (325 ) Balance at June 30, 2014 $ (6 ) $ (7 ) $ 39 $ (315 ) $ (289 ) Other comprehensive income before reclassification, net of income taxes (33 ) 3 (9 ) — (39 ) Amounts reclassified from accumulated other comprehensive income, net of income (a) — (11 ) — 14 3 Net current-period other comprehensive income, net of income taxes (33 ) (8 ) (9 ) 14 (36 ) Balance at September 30, 2014 $ (39 ) $ (15 ) $ 30 $ (301 ) $ (325 ) (a) See table below for details about these reclassifications. Our reclassifications out of AOCI for the three and nine months ended September 30, 2015, and September 30, 2014, are as follows: Nine months ended September 30, 2015 in millions Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on available for sale securities Realized losses $ (1 ) Other income (1 ) Income (loss) from continuing operations before income taxes — Income taxes $ (1 ) Income (loss) from continuing operations Unrealized gains (losses) on derivative financial instruments Interest rate $ 73 Interest income — Loans Interest rate (3 ) Interest expense — Long term debt 70 Income (loss) from continuing operations before income taxes 26 Income taxes $ 44 Income (loss) from continuing operations Foreign currency translation adjustment $ (2 ) Corporate services income (2 ) Income (loss) from continuing operations before income taxes (1 ) Income taxes $ (1 ) Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (13 ) Personnel expense Settlement loss (19 ) Personnel expense Amortization of unrecognized prior service cost 1 Personnel expense (31 ) Income (loss) from continuing operations before income taxes (12 ) Income taxes $ (19 ) Income (loss) from continuing operations Three months ended September 30, 2015 in millions Amount Reclassified from Income Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on derivative financial instruments Interest rate $ 28 Interest income — Loans Interest rate (1 ) Interest expense — Long term debt 27 Income (loss) from continuing operations before income taxes 10 Income taxes $ 17 Income (loss) from continuing operations Foreign currency translation adjustment $ (1 ) Corporate services income (1 ) Income (loss) from continuing operations before income taxes (1 ) Income taxes — Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (4 ) Personnel expense Settlement loss (19 ) Personnel expense (23 ) Income (loss) from continuing operations before income taxes (9 ) Income taxes $ (14 ) Income (loss) from continuing operations Nine months ended September 30, 2014 in millions Amount from Accumulated Other Comprehensive Income Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on derivative financial instruments Interest rate $ 49 Interest income — Loans Interest rate (3 ) Interest expense — Long term debt 46 Income (loss) from continuing operations before income taxes 17 Income taxes $ 29 Income (loss) from continuing operations Foreign currency translation adjustment $ 3 Corporate services income 3 Income (loss) from continuing operations before income taxes — Income taxes $ 3 Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (12 ) Personnel expense Settlement loss (20 ) Personnel expense (32 ) Income (loss) from continuing operations before income taxes (13 ) Income taxes $ (19 ) Income (loss) from continuing operations Three months ended September 30, 2014 in millions Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on derivative financial instruments Interest rate $ 18 Interest income — Loans Interest rate (1 ) Interest expense — Long term debt Foreign exchange contracts 1 Other income 18 Income (loss) from continuing operations before income taxes 7 Income taxes $ 11 Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (4 ) Personnel expense Settlement loss (20 ) Personnel expense (24 ) Income (loss) from continuing operations before income taxes (10 ) Income taxes $ (14 ) Income (loss) from continuing operations

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Shareholders' Equity	17. Shareholders’ Equity Comprehensive Capital Plan As previously reported and as authorized by the Board and pursuant to our 2015 capital plan submitted to and not objected to by the Federal Reserve, we have authority to repurchase up to $725 million of our common shares, which include repurchases to offset issuances of common shares under our employee compensation plans. During the third quarter of 2015, we completed $123 million of common share repurchases under this authorization. Consistent with our 2015 capital plan, the Board declared a quarterly dividend of $.075 per common share for the third quarter of 2015. An additional potential increase in our quarterly common share dividend, up to $.085 per share, will be considered by the Board in 2016 for the fifth quarter of the 2015 capital plan. Preferred Stock We made a quarterly dividend payment of $1.9375 per share, or $5.6 million, on our Series A Preferred Stock during the third quarter of 2015.

Line of Business Results

Line of Business Results	9 Months Ended
	Sep. 30, 2015
Segment Reporting [Abstract]
Line of Business Results	18. Line of Business Results The specific lines of business that constitute each of the major business segments (operating segments) are described below. Key Community Bank Key Community Bank serves individuals and small to mid-sized businesses through its 12-state branch network. Individuals are provided branch-based deposit and investment products, personal finance services, and loans, including residential mortgages, home equity, credit card, and various types of installment loans. In addition, financial, estate and retirement planning, asset management services, and Delaware Trust capabilities are offered to assist high-net-worth clients with their banking, trust, portfolio management, insurance, charitable giving, and related needs. Small businesses are provided deposit, investment and credit products, and business advisory services. Mid-sized businesses are provided products and services that include commercial lending, cash management, equipment leasing, investment and employee benefit programs, succession planning, access to capital markets, derivatives, and foreign exchange. Key Corporate Bank Key Corporate Bank is a full-service corporate and investment bank focused principally on serving the needs of middle market clients in seven industry sectors: consumer, energy, healthcare, industrial, public sector, real estate, and technology. Key Corporate Bank delivers a broad product suite of banking and capital markets products to its clients, including syndicated finance, debt and equity capital markets, commercial payments, equipment finance, commercial mortgage banking, derivatives, foreign exchange, financial advisory, and public finance. Key Corporate Bank is also a significant servicer of commercial mortgage loans and a significant special servicer of CMBS. Key Corporate Bank also delivers many of its product capabilities to clients of Key Community Bank. Other Segments Other Segments consist of Corporate Treasury, Principal Investing, and various exit portfolios. Reconciling Items Total assets included under “Reconciling Items” primarily represent the unallocated portion of nonearning assets of corporate support functions. Charges related to the funding of these assets are part of net interest income and are allocated to the business segments through noninterest expense. Reconciling Items also includes intercompany eliminations and certain items that are not allocated to the business segments because they do not reflect their normal operations. The table on the following pages shows selected financial data for our major business segments for the three- and nine- month periods ended September 30, 2015, and September 30, 2014. The information was derived from the internal financial reporting system that we use to monitor and manage our financial performance. GAAP guides financial accounting, but there is no authoritative guidance for “management accounting” — the way we use our judgment and experience to make reporting decisions. Consequently, the line of business results we report may not be comparable to line of business results presented by other companies. The selected financial data is based on internal accounting policies designed to compile results on a consistent basis and in a manner that reflects the underlying economics of the businesses. In accordance with our policies: • Net interest income is determined by assigning a standard cost for funds used or a standard credit for funds provided based on their assumed maturity, prepayment, and/or repricing characteristics. • Indirect expenses, such as computer servicing costs and corporate overhead, are allocated based on assumptions regarding the extent that each line of business actually uses the services. • The consolidated provision for credit losses is allocated among the lines of business primarily based on their actual net loan charge-offs, adjusted periodically for loan growth and changes in risk profile. The amount of the consolidated provision is based on the methodology that we use to estimate our consolidated ALLL. This methodology is described in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Allowance for Loan and Lease Losses” beginning on page 117 of our 2014 Form 10-K. In the third quarter of 2015, we enhanced the approach used to determine the commercial reserve factors used in estimating the quantitative component of the commercial ALLL. In addition, we began utilizing an enhanced framework to quantify commercial ALLL adjustments resulting from qualitative factors not fully captured within the statistical analysis of incurred loss. The enhancements of the methodology are described in Note 1 (“Basis of Presentation and Accounting Policies”) under the heading “Allowance for Loan and Lease Losses.” As a result of the methodology enhancements, the current period provision for credit losses within each business segment has increased or decreased accordingly. The impact of the increases and decreases on the business segment provision for credit losses was not significant. • Income taxes are allocated based on the statutory federal income tax rate of 35% and a blended state income tax rate (net of the federal income tax benefit) of 2.2%. • Capital is assigned to each line of business based on economic equity. Developing and applying the methodologies that we use to allocate items among our lines of business is a dynamic process. Accordingly, financial results may be revised periodically to reflect enhanced alignment of expense base allocation drivers, changes in the risk profile of a particular business, or changes in our organizational structure. Three months ended September 30, Key Community Bank Key Corporate Bank dollars in millions 2015 2014 2015 2014 SUMMARY OF OPERATIONS Net interest income (TE) $ 379 $ 359 $ 220 $ 215 Noninterest income 200 199 234 185 Total revenue (TE) (a) 579 558 454 400 Provision for credit losses 18 21 30 2 Depreciation and amortization expense 14 16 11 8 Other noninterest expense 434 425 235 205 Income (loss) from continuing operations before income taxes (TE) 113 96 178 185 Allocated income taxes and TE adjustments 42 36 42 51 Income (loss) from continuing operations 71 60 136 134 Income (loss) from discontinued operations, net of taxes — — — — Net income (loss) 71 60 136 134 Less: Net income (loss) attributable to noncontrolling interests — — (2 ) — Net income (loss) attributable to Key $ 71 $ 60 $ 138 $ 134 AVERAGE BALANCES (b) Loans and leases $ 31,039 $ 30,103 $ 26,425 $ 23,215 Total assets (a) 33,090 32,173 32,163 28,268 Deposits 51,234 50,303 18,809 17,599 OTHER FINANCIAL DATA Net loan charge-offs (b) $ 21 $ 28 $ 20 $ (1 ) Return on average allocated equity (b) 10.49 % 8.89 % 28.65 % 31.59 % Return on average allocated equity 10.49 8.89 28.65 31.59 Average full-time equivalent employees (c) 7,326 7,573 2,173 1,998 Nine months ended September 30, Key Community Bank Key Corporate Bank dollars in millions 2015 2014 2015 2014 SUMMARY OF OPERATIONS Net interest income (TE) $ 1,098 $ 1,084 $ 661 $ 621 Noninterest income 589 574 671 566 Total revenue (TE) (a) 1,687 1,658 1,332 1,187 Provision for credit losses 50 48 77 7 Depreciation and amortization expense 42 49 31 22 Other noninterest expense 1,297 1,274 681 599 Income (loss) from continuing operations before income taxes (TE) 298 287 543 559 Allocated income taxes and TE adjustments 111 107 143 158 Income (loss) from continuing operations 187 180 400 401 Income (loss) from discontinued operations, net of taxes — — — — Net income (loss) 187 180 400 401 Less: Net income (loss) attributable to noncontrolling interests — — (1 ) 2 Net income (loss) attributable to Key $ 187 $ 180 $ 401 $ 399 AVERAGE BALANCES (b) Loans and leases $ 30,804 $ 29,979 $ 25,488 $ 22,702 Total assets (a) 32,853 32,063 31,236 27,829 Deposits 50,808 50,151 19,029 16,655 OTHER FINANCIAL DATA Net loan charge-offs (b) $ 69 $ 89 $ 28 $ (15 ) Return on average allocated equity (b) 9.27 % 8.81 % 28.82 % 33.74 % Return on average allocated equity 9.27 8.81 28.82 33.74 Average full-time equivalent employees (c) 7,392 7,613 2,096 1,952 (a) Substantially all revenue generated by our major business segments is derived from clients that reside in the United States. Substantially all long-lived assets, including premises and equipment, capitalized software, and goodwill held by our major business segments, are located in the United States. (b) From continuing operations. (c) The number of average full-time equivalent employees was not adjusted for discontinued operations. Other Segments Total Segments Reconciling Items Key 2015 2014 2015 2014 2015 2014 2015 2014 $ (4 ) $ 6 $ 595 $ 580 $ 3 $ 1 $ 598 $ 581 39 38 473 422 (3 ) (5 ) 470 417 35 44 1,068 1,002 — (4 ) 1,068 998 (4 ) (4 ) 44 19 1 — 45 19 2 3 27 27 35 38 62 65 13 17 682 647 (20 ) (6 ) 662 641 24 28 315 309 (16 ) (36 ) 299 273 (2 ) 1 82 88 (3 ) (18 ) 79 70 26 27 233 221 (13 ) (18 ) 220 203 — — — — (3 ) (17 ) (3 ) (17 ) 26 27 233 221 (16 ) (35 ) 217 186 — — (2 ) — — — (2 ) — $ 26 $ 27 $ 235 $ 221 $ (16 ) $ (35 ) $ 219 $ 186 $ 1,780 $ 2,396 $ 59,244 $ 55,714 $ 37 $ 82 $ 59,281 $ 55,796 26,871 26,017 92,124 86,458 527 665 92,651 87,123 455 564 70,498 68,466 (29 ) (130 ) 70,469 68,336 $ 1 $ 4 $ 42 $ 31 $ (1 ) — $ 41 $ 31 33.27 % 24.63 % 19.00 % 18.28 % (.90 )% (1.26 )% 8.30 % 7.69 % 33.27 24.63 19.00 18.28 (1.11 ) (2.45 ) 8.19 7.05 14 34 9,513 9,605 4,042 4,300 13,555 13,905 Other Segments Total Segments Reconciling Items Key 2015 2014 2015 2014 2015 2014 2015 2014 — $ 21 $ 1,759 $ 1,726 $ 7 $ 3 $ 1,766 $ 1,729 $ 146 174 1,406 1,314 (11 ) (7 ) 1,395 1,307 146 195 3,165 3,040 (4 ) (4 ) 3,161 3,036 (7 ) (19 ) 120 36 1 (1 ) 121 35 6 9 79 80 112 115 191 195 38 54 2,016 1,927 (103 ) (65 ) 1,913 1,862 109 151 950 997 (14 ) (53 ) 936 944 7 27 261 292 (11 ) (42 ) 250 250 102 124 689 705 (3 ) (11 ) 686 694 — — — — 5 (41 ) 5 (41 ) 102 124 689 705 2 (52 ) 691 653 2 4 1 6 — — 1 6 $ 100 $ 120 $ 688 $ 699 $ 2 $ (52 ) $ 690 $ 647 $ 1,908 $ 2,639 $ 58,200 $ 55,320 $ 63 $ 68 $ 58,263 $ 55,388 26,617 25,944 90,706 85,836 618 676 91,324 86,512 454 591 70,291 67,397 (62 ) (138 ) 70,229 67,259 $ 8 $ 8 $ 105 $ 82 — $ (1 ) $ 105 $ 81 40.39 % 36.38 % 18.81 % 19.66 % (.05 )% (.26 )% 6.48 % 6.59 % 40.39 36.38 18.81 19.66 .07 (1.22 ) 6.52 6.20 15 50 9,503 9,615 4,022 4,327 13,525 13,942

Subsequent Event

Subsequent Event	9 Months Ended
	Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Event	19. Subsequent Event Planned Acquisition of First Niagara Financial Group, Inc. On October 30, 2015, we announced that KeyCorp has entered into a definitive agreement and plan of merger (“Agreement”) pursuant to which it will acquire all of the outstanding capital stock of First Niagara Financial Group, Inc. (NASDAQ: FNFG) (“First Niagara”). Under the terms of the Agreement, at the effective time of the merger, each share of First Niagara common stock will be converted into the right to receive (i) 0.680 of a share of KeyCorp common stock and (ii) $2.30 in cash. The exchange ratio of KeyCorp stock for First Niagara stock is fixed and will not adjust based on changes in KeyCorp’s share trading price. First Niagara equity awards outstanding immediately prior to the effective time of the merger will be converted into equity awards for KeyCorp common stock as provided in the Agreement. Each share of First Niagara’s Fixed Rate-to-Floating Rate Perpetual Non-Cumulative Preferred Stock, Series B, will be converted into a share of a newly created series of preferred stock of KeyCorp having substantially the same terms as First Niagara’s preferred stock. Based on the closing price of KeyCorp common shares on Thursday, October 29, 2015, of $13.38 and assuming First Niagara has 356.272 million shares outstanding on a fully-diluted basis, the value of the total consideration to be paid by KeyCorp pursuant to the Agreement is approximately $4.1 billion. The merger is currently expected to be completed during the third quarter of 2016 and is subject to customary closing conditions including the approval of regulators and the shareholders of both KeyCorp and First Niagara. As of September 30, 2015, First Niagara, headquartered in Buffalo, New York, had 394 branches with approximately $39 billion of total assets and $29 billion of deposits.

Basis of Presentation and Acc30

Basis of Presentation and Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Offsetting Derivative Positions	Offsetting Derivative Positions In accordance with the applicable accounting guidance, we take into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts held with a single counterparty on a net basis, and to offset the net derivative position with the related cash collateral when recognizing derivative assets and liabilities. Additional information regarding derivative offsetting is provided in Note 7 (“Derivatives and Hedging Activities”).
Allowance for Loan and Lease Losses	Allowance for Loan and Lease Losses In the third quarter of 2015, we enhanced the approach used to determine the commercial reserve factors used in estimating the commercial ALLL, which had the effect of capturing certain elements in the commercial quantitative reserve component that had formerly been included in the commercial qualitative component. Under the enhanced methodology, we began utilizing more refined commercial estimated loss rates that represent cumulative losses over the estimated average time period from the onset of credit deterioration to the initial loss recorded for an individual loan. In addition, we began utilizing an enhanced framework to quantify commercial ALLL adjustments resulting from qualitative factors that may not be fully captured within the statistical analysis of incurred loss. The impact of these changes was largely neutral to the total ALLL at September 30, 2015. However, because the quantitative reserve is allocated to the business segments at a loan level, while the qualitative portion is allocated at the portfolio level, the impact of the methodology enhancements on the allowance for each business segment and each portfolio caused the business segment and commercial portfolio reserves to increase or decrease accordingly. The impact of the increases and decreases on the business segment and commercial portfolio reserves was not significant.
Troubled Debt Restructurings	Troubled debt restructurings. In January 2014, the FASB issued new accounting guidance that clarifies the definition of when an in substance repossession or foreclosure occurs for purposes of creditor reclassification of residential real estate collateralized consumer mortgage loans by derecognizing the loan and recognizing the collateral asset. This accounting guidance was effective for reporting periods beginning after December 15, 2014 (effective January 1, 2015, for us) and could be implemented using either a modified retrospective method or prospective method. Early adoption was permitted. We elected to implement the new accounting guidance using a prospective approach. The adoption of this accounting guidance did not have a material effect on our financial condition or results of operations. We provide the disclosure related to consumer residential mortgages required by this new accounting guidance in Note 4 (“Asset Quality”).
Transfers and Servicing of Financial Assets	Transfers and servicing of financial assets.
Discontinued Operations	Discontinued operations.
Investments in Qualified Affordable Housing Projects	Investments in qualified affordable housing projects.
Business combinations	Business combinations.
Fair Value Measurement	Fair value measurement.
Cloud Computing Fees	Cloud computing fees.
Imputation of Interest	Imputation of interest.
Consolidation	Consolidation. In August 2014, the FASB issued new accounting guidance that clarifies how to measure the financial assets and the financial liabilities of a consolidated collateralized financing entity. This accounting guidance will be effective for interim and annual reporting periods beginning after December 15, 2015 (effective January 1, 2016, for us) and can be implemented using either a retrospective method or a cumulative-effect approach. Early adoption is permitted. The adoption of this accounting guidance is not expected to have a material effect on our financial condition or results of operations.
Derivatives and Hedging	Derivatives and hedging.
Going Concern	Going concern.
Stock-based Compensation	Stock-based compensation.
Revenue Recognition	Revenue recognition.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Common Share	Our basic and diluted earnings per common share are calculated as follows: Three months ended Nine months ended dollars in millions, except per share amounts 2015 2014 2015 2014 EARNINGS Income (loss) from continuing operations $ 220 $ 203 $ 686 $ 694 Less: Net income (loss) attributable to noncontrolling interests (2 ) — 1 6 Income (loss) from continuing operations attributable to Key 222 203 685 688 Less: Dividends on Series A Preferred Stock 6 6 17 17 Income (loss) from continuing operations attributable to Key common shareholders 216 197 668 671 Income (loss) from discontinued operations, net of (a) (3 ) (17 ) 5 (41 ) Net income (loss) attributable to Key common shareholders $ 213 $ 180 $ 673 $ 630 WEIGHTED-AVERAGE COMMON SHARES Weighted-average common shares outstanding (000) 831,430 867,350 839,758 875,728 Effect of convertible preferred stock — — — — Effect of common share options and other stock awards 7,450 6,772 7,613 6,723 Weighted-average common shares and potential common shares outstanding (000) (b) 838,880 874,122 847,371 882,451 EARNINGS PER COMMON SHARE Income (loss) from continuing operations attributable to Key common shareholders $ .26 $ .23 $ .79 $ .77 Income (loss) from discontinued operations, net of (a) — (.02 ) .01 (.05 ) Net income (loss) attributable to Key common shareholders (c) .26 .21 .80 .72 Income (loss) from continuing operations attributable to Key common shareholders — assuming dilution $ .26 $ .23 $ .78 $ .76 Income (loss) from discontinued operations, net of (a) — (.02 ) .01 (.05 ) Net income (loss) attributable to Key common shareholders — assuming dilution (c) .25 .21 .79 .71 (a) In April 2009, we decided to wind down the operations of Austin, a subsidiary that specialized in managing hedge fund investments for institutional customers. In September 2009, we decided to discontinue the education lending business conducted through Key Education Resources, the education payment and financing unit of KeyBank. In February 2013, we decided to sell Victory to a private equity fund. As a result of these decisions, we have accounted for these businesses as discontinued operations. For further discussion regarding the income (loss) from discontinued operations, see Note 11 (“Acquisitions and Discontinued Operations”). (b) Assumes conversion of common share options and other stock awards and/or convertible preferred stock, as applicable. (c) EPS may not foot due to rounding.

Loans and Loans Held for Sale (

Loans and Loans Held for Sale (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Loans by Category	Our loans by category are summarized as follows: in millions September 30, December 31, September 30, Commercial, financial and agricultural (a) $ 31,095 $ 27,982 $ 26,683 Commercial real estate: Commercial mortgage 8,180 8,047 8,276 Construction 1,070 1,100 1,036 Total commercial real estate loans 9,250 9,147 9,312 Commercial lease financing (b) 3,929 4,252 4,135 Total commercial loans 44,274 41,381 40,130 Residential — prime loans: Real estate — residential mortgage 2,267 2,225 2,213 Home equity: Key Community Bank 10,282 10,366 10,380 Other 222 267 283 Total home equity loans 10,504 10,633 10,663 Total residential — prime loans 12,771 12,858 12,876 Consumer other — Key Community Bank 1,612 1,560 1,546 Credit cards 770 754 724 Consumer other: Marine 620 779 828 Other 38 49 51 Total consumer other 658 828 879 Total consumer loans 15,811 16,000 16,025 Total loans (c) (d) $ 60,085 $ 57,381 $ 56,155 (a) Loan balances include $88 million, $88 million, and $90 million of commercial credit card balances at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. (b) Commercial lease financing includes receivables held as collateral for a secured borrowing of $162 million, $302 million, and $367 million at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. Principal reductions are based on the cash payments received from these related receivables. Additional information pertaining to this secured borrowing is included in Note 18 (“Long-Term Debt”) beginning on page 202 of our 2014 Form 10-K. (c) At September 30, 2015, total loans include purchased loans of $119 million, of which $12 million were PCI loans. At December 31, 2014, total loans include purchased loans of $138 million, of which $13 million were PCI loans. At September 30, 2014, total loans include purchased loans of $143 million, of which $14 million were PCI loans. (d) Total loans exclude loans of $1.9 billion at September 30, 2015, $2.3 billion at December 31, 2014, and $2.4 billion at September 30, 2014, related to the discontinued operations of the education lending business. Additional information pertaining to these loans is provided in Note 11 (“Acquisitions and Discontinued Operations”).
Loans Held for Sale	Our loans held for sale are summarized as follows: in millions September 30, December 31, September 30, Commercial, financial and agricultural $ 74 $ 63 $ 30 Real estate — commercial mortgage 806 638 725 Commercial lease financing 10 15 10 Real estate — residential mortgage 26 18 19 Total loans held for sale (a) $ 916 $ 734 $ 784 (a) Total loans held for sale exclude loans held for sale of $169 million at September 30, 2015, related to the discontinued operations of the education lending business. Additional information pertaining to these loans is provided in Note 11.
Summary of Changes in Loans Held for Sale	Our quarterly summary of changes in loans held for sale follows: in millions September 30, December 31, September 30, Balance at beginning of the period $ 835 $ 784 $ 435 New originations 1,673 2,465 1,593 Transfers from (to) held to maturity, net 24 2 — Loan sales (1,616 ) (2,516 ) (1,243 ) Loan draws (payments), net — (1 ) (1 ) Balance at end of period (a) $ 916 $ 734 $ 784 (a) Total loans held for sale exclude loans held for sale of $169 million at September 30, 2015, related to the discontinued operations of the education lending business. Additional information pertaining to these loans is provided in Note 11.

Asset Quality (Tables)

Asset Quality (Tables)	9 Months Ended
	Sep. 30, 2015
Receivables [Abstract]
Nonperforming Assets and Past Due Loans	Our nonperforming assets and past due loans were as follows: in millions September 30, December 31, September 30, Total nonperforming loans (a), (b) $ 400 $ 418 $ 401 Nonperforming loans held for sale — — — OREO (c) 17 18 16 Other nonperforming assets — — 1 Total nonperforming assets $ 417 $ 436 $ 418 Nonperforming assets from discontinued operations—education lending (d) $ 8 $ 11 $ 9 Restructured loans included in nonperforming loans $ 159 $ 157 $ 137 Restructured loans with an allocated specific allowance (e) 71 82 115 Specifically allocated allowance for restructured loans (f) 29 34 30 Accruing loans past due 90 days or more $ 54 $ 96 $ 71 Accruing loans past due 30 through 89 days 271 235 340 (a) Loan balances exclude $12 million, $13 million, and $14 million of PCI loans at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. (b) Includes carrying value of consumer residential mortgage loans in the process of foreclosure of approximately $114 million at September 30, 2015. (c) Includes carrying value of foreclosed residential real estate of approximately $13 million at September 30, 2015. (d) Restructured loans of approximately $20 million, $17 million, and $16 million are included in discontinued operations at September 30, 2015, December 31, 2014, and September 30, 2014, respectively. See Note 11 (“Acquisitions and Discontinued Operations”) for further discussion. (e) Included in individually impaired loans allocated a specific allowance. (f) Included in allowance for individually evaluated impaired loans.
Breakdown of Individually Impaired Loans	The following tables set forth a further breakdown of individually impaired loans as of September 30, 2015, December 31, 2014, and September 30, 2014: Unpaid Average September 30, 2015 Recorded Principal Specific Recorded in millions Investment (a) Balance (b) Allowance Investment With no related allowance recorded: Commercial, financial and agricultural $ 30 $ 54 — $ 19 Commercial real estate: Commercial mortgage 9 12 — 10 Construction 5 5 — 6 Total commercial real estate loans 14 17 — 16 Total commercial loans 44 71 — 35 Real estate — residential mortgage 22 22 — 22 Home equity: Key Community Bank 58 58 — 59 Other 2 2 — 2 Total home equity loans 60 60 — 61 Consumer other: Marine 1 1 — 1 Total consumer other 1 1 — 1 Total consumer loans 83 83 — 84 Total loans with no related allowance recorded 127 154 — 119 With an allowance recorded: Commercial, financial and agricultural 43 56 $ 9 58 Commercial real estate: Commercial mortgage 5 6 1 6 Total commercial real estate loans 5 6 1 6 Total commercial loans 48 62 10 64 Real estate — residential mortgage 33 33 5 33 Home equity: Key Community Bank 54 54 17 53 Other 10 10 1 10 Total home equity loans 64 64 18 63 Consumer other — Key Community Bank 3 3 — 3 Credit cards 3 3 1 3 Consumer other: Marine 38 38 2 39 Other 2 2 — 2 Total consumer other 40 40 2 41 Total consumer loans 143 143 26 143 Total loans with an allowance recorded 191 205 36 207 Total $ 318 $ 359 $ 36 $ 326 (a) The Recorded Investment represents the face amount of the loan increased or decreased by applicable accrued interest, net deferred loan fees and costs, and unamortized premium or discount, and reflects direct charge-offs. This amount is a component of total loans on our consolidated balance sheet. (b) The Unpaid Principal Balance represents the customer’s legal obligation to us. Unpaid Average December 31, 2014 Recorded Principal Specific Recorded in millions Investment (a) Balance (b) Allowance Investment With no related allowance recorded: Commercial, financial and agricultural $ 6 $ 17 — $ 8 Commercial real estate: Commercial mortgage 15 20 — 19 Construction 5 6 — 7 Total commercial real estate loans 20 26 — 26 Total commercial loans 26 43 — 34 Real estate — residential mortgage 24 24 — 30 Home equity: Key Community Bank 62 63 — 63 Other 1 1 — 2 Total home equity loans 63 64 — 65 Consumer other: Marine 2 2 — 2 Total consumer other 2 2 — 2 Total consumer loans 89 90 — 97 Total loans with no related allowance recorded 115 133 — 131 With an allowance recorded: Commercial, financial and agricultural 37 37 $ 9 28 Commercial real estate: Commercial mortgage 6 6 2 6 Construction 3 3 1 2 Total commercial real estate loans 9 9 3 8 Total commercial loans 46 46 12 36 Real estate — residential mortgage 31 31 5 25 Home equity: Key Community Bank 46 46 16 43 Other 11 11 2 11 Total home equity loans 57 57 18 54 Consumer other — Key Community Bank 4 4 — 3 Credit cards 4 4 — 4 Consumer other: Marine 43 43 5 45 Other 2 2 — 2 Total consumer other 45 45 5 47 Total consumer loans 141 141 28 133 Total loans with an allowance recorded 187 187 40 169 Total $ 302 $ 320 $ 40 $ 300 (a) The Recorded Investment represents the face amount of the loan increased or decreased by applicable accrued interest, net deferred loan fees and costs, and unamortized premium or discount, and reflects direct charge-offs. This amount is a component of total loans on our consolidated balance sheet. (b) The Unpaid Principal Balance represents the customer’s legal obligation to us. Unpaid Average September 30, 2014 Recorded Principal Specific Recorded in millions Investment (a) Balance (b) Allowance Investment With no related allowance recorded: Commercial, financial and agricultural $ 11 $ 20 — $ 12 Commercial real estate: Commercial mortgage 22 27 — 23 Construction 9 20 — 7 Total commercial real estate loans 31 47 — 30 Total commercial loans 42 67 — 42 Real estate — residential mortgage 36 36 — 30 Home equity: Key Community Bank 64 64 — 65 Other 2 2 — 2 Total home equity loans 66 66 — 67 Consumer other: Marine 2 2 — 2 Total consumer other 2 2 — 2 Total consumer loans 104 104 — 99 Total loans with no related allowance recorded 146 171 — 141 With an allowance recorded: Commercial, financial and agricultural 20 21 $ 7 12 Commercial real estate: Commercial mortgage 7 7 2 5 Total commercial real estate loans 7 7 2 5 Total commercial loans 27 28 9 17 Real estate — residential mortgage 19 19 4 24 Home equity: Key Community Bank 41 41 16 39 Other 11 11 2 11 Total home equity loans 52 52 18 50 Consumer other — Key Community Bank 3 3 — 3 Credit cards 3 3 1 3 Consumer other: Marine 46 46 5 47 Other 2 2 1 2 Total consumer other 48 48 6 49 Total consumer loans 125 125 29 129 Total loans with an allowance recorded 152 153 38 146 Total $ 298 $ 324 $ 38 $ 287 (a) The Recorded Investment represents the face amount of the loan increased or decreased by applicable accrued interest, net deferred loan fees and costs, and unamortized premium or discount, and reflects direct charge-offs. This amount is a component of total loans on our consolidated balance sheet. (b) The Unpaid Principal Balance represents the customer’s legal obligation to us.
Breakdown of Nonperforming TDRs by Loans Category	A further breakdown of TDRs included in nonperforming loans by loan category as of September 30, 2015, follows: Pre-modification Post-modification Outstanding Outstanding September 30, 2015 Number Recorded Recorded dollars in millions of Loans Investment Investment LOAN TYPE Nonperforming: Commercial, financial and agricultural 12 $ 56 $ 50 Commercial real estate: Real estate — commercial mortgage 11 30 7 Total commercial real estate loans 11 30 7 Total commercial loans 23 86 57 Real estate — residential mortgage 356 21 21 Home equity: Key Community Bank 1,093 79 70 Other 122 3 3 Total home equity loans 1,215 82 73 Consumer other — Key Community Bank 26 1 1 Credit cards 314 2 2 Consumer other: Marine 92 6 5 Other 16 — — Total consumer other 108 6 5 Total consumer loans 2,019 112 102 Total nonperforming TDRs 2,042 198 159 Prior-year accruing: (a) Commercial, financial and agricultural 12 6 3 Commercial real estate: Real estate — commercial mortgage 1 2 1 Total commercial real estate loans 1 2 1 Total commercial loans 13 8 4 Real estate — residential mortgage 499 36 36 Home equity: Key Community Bank 794 49 42 Other 327 10 8 Total home equity loans 1,121 59 50 Consumer other — Key Community Bank 45 2 1 Credit cards 473 2 2 Consumer other: Marine 398 59 33 Other 68 2 2 Total consumer other 466 61 35 Total consumer loans 2,604 160 124 Total prior-year accruing TDRs 2,617 168 128 Total TDRs 4,659 $ 366 $ 287 (a) All TDRs that were restructured prior to January 1, 2015, and are fully accruing. A further breakdown of TDRs included in nonperforming loans by loan category as of December 31, 2014, follows: Pre-modification Post-modification Outstanding Outstanding December 31, 2014 Number Recorded Recorded dollars in millions of Loans Investment Investment LOAN TYPE Nonperforming: Commercial, financial and agricultural 14 $ 25 $ 23 Commercial real estate: Real estate — commercial mortgage 10 38 13 Real estate — construction 1 5 — Total commercial real estate loans 11 43 13 Total commercial loans 25 68 36 Real estate — residential mortgage 453 27 27 Home equity: Key Community Bank 1,184 79 72 Other 158 4 4 Total home equity loans 1,342 83 76 Consumer other — Key Community Bank 37 2 1 Credit cards 290 2 2 Consumer other: Marine 206 17 14 Other 38 1 1 Total consumer other 244 18 15 Total consumer loans 2,366 132 121 Total nonperforming TDRs 2,391 200 157 Prior-year accruing: (a) Commercial, financial and agricultural 20 6 3 Commercial real estate: Real estate — commercial mortgage 1 2 1 Total commercial real estate loans 1 2 1 Total commercial loans 21 8 4 Real estate — residential mortgage 381 29 29 Home equity: Key Community Bank 674 41 36 Other 310 9 8 Total home equity loans 984 50 44 Consumer other — Key Community Bank 45 2 2 Credit cards 514 4 2 Consumer other: Marine 373 54 31 Other 67 2 1 Total consumer other 440 56 32 Total consumer loans 2,364 141 109 Total prior-year accruing TDRs 2,385 149 113 Total TDRs 4,776 $ 349 $ 270 (a) All TDRs that were restructured prior to January 1, 2014, and are fully accruing. A further breakdown of TDRs included in nonperforming loans by loan category as of September 30, 2014, follows: Pre-modification Post-modification Outstanding Outstanding September 30, 2014 Number Recorded Recorded dollars in millions of Loans Investment Investment LOAN TYPE Nonperforming: Commercial, financial and agricultural 20 $ 16 $ 9 Commercial real estate: Real estate — commercial mortgage 12 39 14 Real estate — construction 3 15 1 Total commercial real estate loans 15 54 15 Total commercial loans 35 70 24 Real estate — residential mortgage 464 28 28 Home equity: Key Community Bank 1,125 70 64 Other 133 4 4 Total home equity loans 1,258 74 68 Consumer other — Key Community Bank 31 1 1 Credit cards 156 1 1 Consumer other: Marine 211 16 14 Other 40 1 1 Total consumer other 251 17 15 Total consumer loans 2,160 121 113 Total nonperforming TDRs 2,195 191 137 Prior-year accruing: (a) Commercial, financial and agricultural 25 6 3 Commercial real estate: Real estate — commercial mortgage 4 18 8 Total commercial real estate loans 4 18 8 Total commercial loans 29 24 11 Real estate — residential mortgage 359 28 28 Home equity: Key Community Bank 731 45 40 Other 325 10 8 Total home equity loans 1,056 55 48 Consumer other — Key Community Bank 53 2 2 Credit cards 564 4 3 Consumer other: Marine 402 58 34 Other 72 2 1 Total consumer other 474 60 35 Total consumer loans 2,506 149 116 Total prior-year accruing TDRs 2,535 173 127 Total TDRs 4,730 $ 364 $ 264 (a) All TDRs that were restructured prior to January 1, 2014, and are fully accruing.
Post-Modification Outstanding Recorded Investment by Concession Type for Our Commercial Accruing and Nonaccruing TDRs	The following table shows the post-modification outstanding recorded investment by concession type for our commercial and consumer accruing and nonaccruing TDRs and other selected financial data. in millions September 30, December 31, September 30, Commercial loans: Interest rate reduction $ 58 $ 13 $ 24 Forgiveness of principal 2 2 5 Other 1 25 6 Total $ 61 $ 40 $ 35 Consumer loans: Interest rate reduction $ 139 $ 140 $ 140 Forgiveness of principal 4 4 4 Other 83 86 85 Total $ 226 $ 230 $ 229 Total commercial and consumer TDRs (a) $ 287 $ 270 $ 264 Total loans 60,085 57,381 56,155 (a) Commitments outstanding to lend additional funds to borrowers whose loan terms have been modified in TDRs are $8 million, $5 million, and $1 million at September 30, 2015, December 31, 2014, and September 30, 2014, respectively.
Past Due Loans Including Current Loans	The following aging analysis of past due and current loans as of September 30, 2015, December 31, 2014, and September 30, 2014, provides further information regarding Key’s credit exposure. 90 and Total Past 30-59 60-89 Greater Due and Purchased September 30, 2015 Days Past Days Past Days Past Nonperforming Nonperforming Credit Total in millions Current Due Due Due Loans Loans Impaired Loans LOAN TYPE Commercial, financial and agricultural $ 30,901 $ 58 $ 30 $ 17 $ 89 $ 194 — $ 31,095 Commercial real estate: Commercial mortgage 8,127 18 7 5 23 53 — 8,180 Construction 1,060 1 — — 9 10 — 1,070 Total commercial real estate loans 9,187 19 7 5 32 63 — 9,250 Commercial lease financing 3,875 29 3 1 21 54 — 3,929 Total commercial loans $ 43,963 $ 106 $ 40 $ 23 $ 142 $ 311 — $ 44,274 Real estate — residential mortgage $ 2,171 $ 11 $ 4 $ 3 $ 67 $ 85 $ 11 $ 2,267 Home equity: Key Community Bank 10,027 49 20 11 174 254 1 10,282 Other 208 4 2 1 7 14 — 222 Total home equity loans 10,235 53 22 12 181 268 1 10,504 Consumer other — Key Community Bank 1,595 7 4 5 1 17 — 1,612 Credit cards 750 6 4 8 2 20 — 770 Consumer other: Marine 601 10 2 1 6 19 — 620 Other 34 1 1 1 1 4 — 38 Total consumer other 635 11 3 2 7 23 — 658 Total consumer loans $ 15,386 $ 88 $ 37 $ 30 $ 258 $ 413 $ 12 $ 15,811 Total loans $ 59,349 $ 194 $ 77 $ 53 $ 400 $ 724 $ 12 $ 60,085 90 and Total Past 30-59 60-89 Greater Due and Purchased December 31, 2014 Days Past Days Past Days Past Nonperforming Nonperforming Credit Total in millions Current Due Due Due Loans Loans Impaired Loans LOAN TYPE Commercial, financial and agricultural $ 27,858 $ 19 $ 14 $ 32 $ 59 $ 124 — $ 27,982 Commercial real estate: Commercial mortgage 7,981 6 10 16 34 66 — 8,047 Construction 1,084 2 — 1 13 16 — 1,100 Total commercial real estate loans 9,065 8 10 17 47 82 — 9,147 Commercial lease financing 4,172 30 21 11 18 80 — 4,252 Total commercial loans $ 41,095 $ 57 $ 45 $ 60 $ 124 $ 286 — $ 41,381 Real estate — residential mortgage $ 2,111 $ 12 $ 7 $ 4 $ 79 $ 102 $ 12 $ 2,225 Home equity: Key Community Bank 10,098 46 22 14 185 267 1 10,366 Other 249 5 2 1 10 18 — 267 Total home equity loans 10,347 51 24 15 195 285 1 10,633 Consumer other — Key Community Bank 1,541 9 3 5 2 19 — 1,560 Credit cards 733 6 4 9 2 21 — 754 Consumer other: Marine 746 11 5 2 15 33 — 779 Other 46 1 — 1 1 3 — 49 Total consumer other 792 12 5 3 16 36 — 828 Total consumer loans $ 15,524 $ 90 $ 43 $ 36 $ 294 $ 463 $ 13 $ 16,000 Total loans $ 56,619 $ 147 $ 88 $ 96 $ 418 $ 749 $ 13 $ 57,381 90 and Total Past 30-59 60-89 Greater Due and Purchased September 30, 2014 Days Past Days Past Days Past Nonperforming Nonperforming Credit Total in millions Current Due Due Due Loans Loans Impaired Loans LOAN TYPE Commercial, financial and agricultural $ 26,534 $ 50 $ 34 $ 18 $ 47 $ 149 — $ 26,683 Commercial real estate: Commercial mortgage 8,201 17 7 9 41 74 $ 1 8,276 Construction 1,017 3 2 — 14 19 — 1,036 Total commercial real estate loans 9,218 20 9 9 55 93 1 9,312 Commercial lease financing 4,017 74 24 6 14 118 — 4,135 Total commercial loans $ 39,769 $ 144 $ 67 $ 33 $ 116 $ 360 $ 1 $ 40,130 Real estate — residential mortgage $ 2,091 $ 17 $ 7 $ 5 $ 81 $ 110 $ 12 $ 2,213 Home equity: Key Community Bank 10,124 46 19 16 174 255 1 10,380 Other 266 4 2 1 10 17 — 283 Total home equity loans 10,390 50 21 17 184 272 1 10,663 Consumer other — Key Community Bank 1,528 7 3 6 2 18 — 1,546 Credit cards 705 5 4 9 1 19 — 724 Consumer other: Marine 796 11 4 1 16 32 — 828 Other 49 1 — — 1 2 — 51 Total consumer other 845 12 4 1 17 34 — 879 Total consumer loans $ 15,559 $ 91 $ 39 $ 38 $ 285 $ 453 $ 13 $ 16,025 Total loans $ 55,328 $ 235 $ 106 $ 71 $ 401 $ 813 $ 14 $ 56,155
Financing Receivable Credit Quality Indicators	Commercial Credit Exposure Credit Risk Profile by Creditworthiness Category (a) September 30, in millions Commercial, financial and agricultural RE — Commercial RE — Construction Commercial Lease Total RATING (b), (c) 2015 2014 2015 2014 2015 2014 2015 2014 2015 2014 AAA — AA $ 384 $ 342 $ 3 $ 2 — $ 1 $ 501 $ 528 $ 888 $ 873 A 1,439 1,147 4 2 — — 478 596 1,921 1,745 BBB — BB 27,438 23,822 7,690 7,736 $ 935 895 2,808 2,848 38,871 35,301 B 639 594 272 298 89 100 88 75 1,088 1,067 CCC — C 1,195 778 211 238 46 40 54 88 1,506 1,144 Total $ 31,095 $ 26,683 $ 8,180 $ 8,276 $ 1,070 $ 1,036 $ 3,929 $ 4,135 $ 44,274 $ 40,130 (a) Credit quality indicators are updated on an ongoing basis and reflect credit quality information as of the dates indicated. (b) Our bond rating to internal loan grade conversion system is as follows: AAA - AA = 1, A = 2, BBB - BB = 3 - 13, B = 14 - 16, and CCC - C = 17 - 20. (c) Our internal loan grade to regulatory-defined classification is as follows: Pass = 1-16, Special Mention = 17, Substandard = 18, Doubtful = 19, and Loss = 20. Consumer Credit Exposure Credit Risk Profile by Regulatory Classifications (a), (b) September 30, in millions Residential — Prime GRADE 2015 2014 Pass $ 12,496 $ 12,576 Substandard 263 287 Total $ 12,759 $ 12,863 Credit Risk Profile Based on Payment Activity (a) September 30, Consumer — Key Community Bank Credit cards Consumer — Marine Consumer — Other Total in millions 2015 2014 2015 2014 2015 2014 2015 2014 2015 2014 Performing $ 1,611 $ 1,544 $ 768 $ 723 $ 614 $ 812 $ 37 $ 50 $ 3,030 $ 3,129 Nonperforming 1 2 2 1 6 16 1 1 10 20 Total $ 1,612 $ 1,546 $ 770 $ 724 $ 620 $ 828 $ 38 $ 51 $ 3,040 $ 3,149 (a) Credit quality indicators are updated on an ongoing basis and reflect credit quality information as of the dates indicated. (b) Our past due payment activity to regulatory classification conversion is as follows: pass = less than 90 days; and substandard = 90 days and greater plus nonperforming loans.
Summary of Allowance for Loan and Lease Losses	A summary of the changes in the ALLL for the periods indicated is presented in the table below: Three months ended Nine months ended in millions 2015 2014 2015 2014 Balance at beginning of period — continuing operations $ 796 $ 814 $ 794 $ 848 Charge-offs (53 ) (49 ) (152 ) (162 ) Recoveries 12 18 47 81 Net loans and leases charged off (41 ) (31 ) (105 ) (81 ) Provision for loan and lease losses from continuing operations 36 21 102 37 Foreign currency translation adjustment (1 ) — (1 ) — Balance at end of period — continuing operations $ 790 $ 804 $ 790 $ 804
Changes in Allowance for Loan and Lease Losses by Loan Category	The changes in the ALLL by loan category for the periods indicated are as follows: in millions December 31, 2014 Provision Charge-offs Recoveries September 30, 2015 Commercial, financial and agricultural $ 391 $ 93 $ (59 ) $ 13 $ 438 Real estate — commercial mortgage 148 (9 ) (2 ) 2 139 Real estate — construction 28 (3 ) (1 ) 1 25 Commercial lease financing 56 (13 ) (5 ) 7 45 Total commercial loans 623 68 (67 ) 23 647 Real estate — residential mortgage 23 (1 ) (4 ) 1 19 Home equity: Key Community Bank 66 4 (21 ) 5 54 Other 5 (1 ) (4 ) 4 4 Total home equity loans 71 3 (25 ) 9 58 Consumer other — Key Community Bank 22 11 (18 ) 5 20 Credit cards 33 20 (23 ) 2 32 Consumer other: Marine 21 — (14 ) 6 13 Other 1 — (1 ) 1 1 Total consumer other: 22 — (15 ) 7 14 Total consumer loans 171 33 (85 ) 24 143 Total ALLL — continuing operations 794 101 (a) (152 ) 47 790 Discontinued operations 29 9 (25 ) 10 23 Total ALLL — including discontinued operations $ 823 $ 110 $ (177 ) $ 57 $ 813 (a) Includes a $1 million foreign currency translation adjustment. Excludes a provision for losses on lending-related commitments of $19 million. in millions December 31, 2013 Provision Charge-offs Recoveries September 30, 2014 Commercial, financial and agricultural $ 362 $ 32 $ (35 ) $ 27 $ 386 Real estate — commercial mortgage 165 (7 ) (3 ) 4 159 Real estate — construction 32 (16 ) (4 ) 16 28 Commercial lease financing 62 (9 ) (6 ) 8 55 Total commercial loans 621 — (48 ) 55 628 Real estate — residential mortgage 37 (10 ) (7 ) 2 22 Home equity: Key Community Bank 84 9 (29 ) 7 71 Other 11 (1 ) (8 ) 4 6 Total home equity loans 95 8 (37 ) 11 77 Consumer other — Key Community Bank 29 14 (23 ) 4 24 Credit cards 34 24 (27 ) 1 32 Consumer other: Marine 29 1 (18 ) 7 19 Other 3 — (2 ) 1 2 Total consumer other: 32 1 (20 ) 8 21 Total consumer loans 227 37 (114 ) 26 176 Total ALLL — continuing operations 848 37 (a) (162 ) 81 804 Discontinued operations 39 15 (34 ) 11 31 Total ALLL — including discontinued operations $ 887 $ 52 $ (196 ) $ 92 $ 835 (a) Excludes a credit for losses on lending-related commitments of $2 million.
Allowance for Loan and Lease Losses and Corresponding Loan Balances	A breakdown of the individual and collective ALLL and the corresponding loan balances as of September 30, 2015, follows: Allowance Outstanding Individually Collectively Purchased Individually Collectively Purchased September 30, 2015 Evaluated for Evaluated for Credit Evaluated for Evaluated for Credit in millions Impairment Impairment Impaired Loans Impairment Impairment Impaired Commercial, financial and agricultural $ 9 $ 429 — $ 31,095 $ 72 $ 31,023 — Commercial real estate: Commercial mortgage 1 138 — 8,180 15 8,165 — Construction — 25 — 1,070 5 1,065 — Total commercial real estate loans 1 163 — 9,250 20 9,230 — Commercial lease financing — 45 — 3,929 — 3,929 — Total commercial loans 10 637 — 44,274 92 44,182 — Real estate — residential mortgage 5 13 $ 1 2,267 56 2,200 $ 11 Home equity: Key Community Bank 17 37 — 10,282 113 10,168 1 Other 2 2 — 222 11 211 — Total home equity loans 19 39 — 10,504 124 10,379 1 Consumer other — Key Community Bank — 20 — 1,612 3 1,609 — Credit cards — 32 — 770 3 767 — Consumer other: Marine 2 11 — 620 38 582 — Other — 1 — 38 2 36 — Total consumer other 2 12 — 658 40 618 — Total consumer loans 26 116 1 15,811 226 15,573 12 Total ALLL — continuing operations 36 753 1 60,085 318 59,755 12 Discontinued operations 2 21 — 1,891 20 1,871 — Total ALLL — including discontinued operations $ 38 $ 774 $ 1 $ 61,976 $ 338 $ 61,626 $ 12 A breakdown of the individual and collective ALLL and the corresponding loan balances as of December 31, 2014, follows: Allowance Outstanding Individually Collectively Purchased Individually Collectively Purchased December 31, 2014 Evaluated for Evaluated for Credit Evaluated for Evaluated for Credit in millions Impairment Impairment Impaired Loans Impairment Impairment Impaired Commercial, financial and agricultural $ 9 $ 382 — $ 27,982 $ 43 $ 27,939 — Commercial real estate: Commercial mortgage 2 146 — 8,047 21 8,025 $ 1 Construction 1 27 — 1,100 8 1,092 — Total commercial real estate loans 3 173 — 9,147 29 9,117 1 Commercial lease financing — 56 — 4,252 — 4,252 — Total commercial loans 12 611 — 41,381 72 41,308 1 Real estate — residential mortgage 5 17 $ 1 2,225 55 2,159 11 Home equity: Key Community Bank 16 50 — 10,366 108 10,257 1 Other 2 3 — 267 12 255 — Total home equity loans 18 53 — 10,633 120 10,512 1 Consumer other — Key Community Bank — 22 — 1,560 4 1,556 — Credit cards — 33 — 754 4 750 — Consumer other: Marine 5 16 — 779 45 734 — Other — 1 — 49 2 47 — Total consumer other 5 17 — 828 47 781 — Total consumer loans 28 142 1 16,000 230 15,758 12 Total ALLL — continuing operations 40 753 1 57,381 302 57,066 13 Discontinued operations 1 28 — 2,295 (a) 17 2,278 (a) — Total ALLL — including discontinued operations $ 41 $ 781 $ 1 $ 59,676 $ 319 $ 59,344 $ 13 (a) Amount includes $191 million of loans carried at fair value that are excluded from ALLL consideration. A breakdown of the individual and collective ALLL and the corresponding loan balances as of September 30, 2014, follows: Allowance Outstanding Individually Collectively Purchased Individually Collectively Purchased September 30, 2014 Evaluated for Evaluated for Credit Evaluated for Evaluated for Credit in millions Impairment Impairment Impaired Loans Impairment Impairment Impaired Commercial, financial and agricultural $ 7 $ 379 — $ 26,683 $ 31 $ 26,652 — Commercial real estate: Commercial mortgage 2 157 — 8,276 29 8,246 $ 1 Construction — 28 — 1,036 10 1,026 — Total commercial real estate loans 2 185 — 9,312 39 9,272 1 Commercial lease financing — 55 — 4,135 — 4,135 — Total commercial loans 9 619 — 40,130 70 40,059 1 Real estate — residential mortgage 4 17 $ 1 2,213 55 2,146 12 Home equity: Key Community Bank 16 55 — 10,380 105 10,274 1 Other 2 4 — 283 12 271 — Total home equity loans 18 59 — 10,663 117 10,545 1 Consumer other — Key Community Bank — 24 — 1,546 4 1,542 — Credit cards 1 31 — 724 3 721 — Consumer other: Marine 5 14 — 828 48 780 — Other 1 1 — 51 2 49 — Total consumer other 6 15 — 879 50 829 — Total consumer loans 29 146 1 16,025 229 15,783 13 Total ALLL — continuing operations 38 765 1 56,155 299 55,842 14 Discontinued operations 1 30 — 2,392 (a) 16 2,376 (a) — Total ALLL — including discontinued operations $ 39 $ 795 $ 1 $ 58,547 $ 315 $ 58,218 $ 14 (a) Amount includes $201 million of loans carried at fair value that are excluded from ALLL consideration.
Changes in Liability for Credit Losses on Lending Related Commitments	Changes in the liability for credit losses on unfunded lending-related commitments are summarized as follows: Three months ended Nine months ended in millions 2015 2014 2015 2014 Balance at beginning of period $ 45 $ 37 $ 35 $ 37 Provision (credit) for losses on lending-related commitments 9 (2 ) 19 (2 ) Balance at end of period $ 54 $ 35 $ 54 $ 35

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value of Assets and Liabilities Measured on Recurring Basis	Certain assets and liabilities are measured at fair value on a recurring basis in accordance with GAAP. The following tables present these assets and liabilities at September 30, 2015, December 31, 2014, and September 30, 2014. September 30, 2015 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Trading account assets: U.S. Treasury, agencies and corporations — $ 694 — $ 694 States and political subdivisions — 35 — 35 Collateralized mortgage obligations — — — — Other mortgage-backed securities — 46 — 46 Other securities $ 4 23 — 27 Total trading account securities 4 798 — 802 Commercial loans — 9 — 9 Total trading account assets 4 807 — 811 Securities available for sale: States and political subdivisions — 15 — 15 Collateralized mortgage obligations — 12,003 — 12,003 Other mortgage-backed securities — 2,330 — 2,330 Other securities 11 — $ 17 28 Total securities available for sale 11 14,348 17 14,376 Other investments: Principal investments: Direct — — 66 66 Indirect — — 271 271 Total principal investments — — 337 337 Equity and mezzanine investments: Direct — — — — Indirect — — 9 9 Total equity and mezzanine investments — — 9 9 Other — — 4 4 Total other investments — — 350 350 Derivative assets: Interest rate — 1,097 22 1,119 Foreign exchange 120 10 — 130 Commodity — 482 — 482 Credit — 4 3 7 Derivative assets 120 1,593 25 1,738 Netting adjustments (a) — — — (945 ) Total derivative assets 120 1,593 25 793 Accrued income and other assets — 2 — 2 Total assets on a recurring basis at fair value $ 135 $ 16,750 $ 392 $ 16,332 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions — $ 677 — $ 677 Derivative liabilities: Interest rate — 656 — 656 Foreign exchange $ 102 10 — 112 Commodity — 469 — 469 Credit — 5 — 5 Derivative liabilities 102 1,140 — 1,242 Netting adjustments (a) — — — (566 ) Total derivative liabilities 102 1,140 — 676 Accrued expense and other liabilities — 2 — 2 Total liabilities on a recurring basis at fair value $ 102 $ 1,819 — $ 1,355 (a) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts with a single counterparty on a net basis and to offset the net derivative position with the related cash collateral. Total derivative assets and liabilities include these netting adjustments. December 31, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Trading account assets: U.S. Treasury, agencies and corporations — $ 555 — $ 555 States and political subdivisions — 38 — 38 Collateralized mortgage obligations — — — — Other mortgage-backed securities — 124 — 124 Other securities $ 2 29 — 31 Total trading account securities 2 746 — 748 Commercial loans — 2 — 2 Total trading account assets 2 748 — 750 Securities available for sale: States and political subdivisions — 23 — 23 Collateralized mortgage obligations — 11,270 — 11,270 Other mortgage-backed securities — 2,035 — 2,035 Other securities 22 — $ 10 32 Total securities available for sale 22 13,328 10 13,360 Other investments: Principal investments: Direct 2 — 102 104 Indirect — — 302 302 Total principal investments 2 — 404 406 Equity and mezzanine investments: Direct — — — — Indirect — — 10 10 Total equity and mezzanine investments — — 10 10 Other — — 4 4 Total other investments 2 — 418 420 Derivative assets: Interest rate — 924 13 937 Foreign exchange 91 2 — 93 Commodity — 608 — 608 Credit — 2 3 5 Derivative assets 91 1,536 16 1,643 Netting adjustments (a) — — — (1,034 ) Total derivative assets 91 1,536 16 609 Accrued income and other assets — — — — Total assets on a recurring basis at fair value $ 117 $ 15,612 $ 444 $ 15,139 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions — $ 423 — $ 423 Derivative liabilities: Interest rate — 644 — 644 Foreign exchange $ 77 4 — 81 Commodity — 594 — 594 Credit — 6 $ 1 7 Derivative liabilities 77 1,248 1 1,326 Netting adjustments (a) — — — (542 ) Total derivative liabilities 77 1,248 1 784 Accrued expense and other liabilities — — — — Total liabilities on a recurring basis at fair value $ 77 $ 1,671 $ 1 $ 1,207 (a) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts with a single counterparty on a net basis and to offset the net derivative position with the related cash collateral. Total derivative assets and liabilities include these netting adjustments. September 30, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Trading account assets: U.S. Treasury, agencies and corporations — $ 596 — $ 596 States and political subdivisions — 24 — 24 Collateralized mortgage obligations — — — — Other mortgage-backed securities — 186 — 186 Other securities $ 13 145 — 158 Total trading account securities 13 951 — 964 Commercial loans — 1 — 1 Total trading account assets 13 952 — 965 Securities available for sale: States and political subdivisions — 27 — 27 Collateralized mortgage obligations — 10,009 — 10,009 Other mortgage-backed securities — 2,177 — 2,177 Other securities 22 — $ 10 32 Total securities available for sale 22 12,213 10 12,245 Other investments: Principal investments: Direct — — 115 115 Indirect — — 353 353 Total principal investments — — 468 468 Equity and mezzanine investments: Direct — — — — Indirect — — 13 13 Total equity and mezzanine investments — — 13 13 Other — — 4 4 Total other investments — — 485 485 Derivative assets: Interest rate — 827 19 846 Foreign exchange 73 8 — 81 Commodity — 95 — 95 Credit — 1 3 4 Derivative assets 73 931 22 1,026 Netting adjustments (a) — — — (613 ) Total derivative assets 73 931 22 413 Accrued income and other assets — — — — Total assets on a recurring basis at fair value $ 108 $ 14,096 $ 517 $ 14,108 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions $ 6 $ 490 — $ 496 Derivative liabilities: Interest rate — 616 — 616 Foreign exchange 55 9 — 64 Commodity — 89 $ 1 90 Credit — 7 — 7 Derivative liabilities 55 721 1 777 Netting adjustments (a) — — — (393 ) Total derivative liabilities 55 721 1 384 Accrued expense and other liabilities — — — — Total liabilities on a recurring basis at fair value $ 61 $ 1,211 $ 1 $ 880 (a) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts with a single counterparty on a net basis and to offset the net derivative position with the related cash collateral. Total derivative assets and liabilities include these netting adjustments.
Change in Fair Values of Level 3 Financial Instruments	Changes in Level 3 Fair Value Measurements The following table shows the change in the fair values of our Level 3 financial instruments for the three and nine months ended September 30, 2015, and September 30, 2014. We mitigate the credit risk, interest rate risk, and risk of loss related to many of these Level 3 instruments by using securities and derivative positions classified as Level 1 or Level 2. Level 1 and Level 2 instruments are not included in the following table. Therefore, the gains or losses shown do not include the impact of our risk management activities. in millions Beginning Gains (Losses) Earnings Purchases Sales Settlements Transfers (d) Transfers (d) End of (f) Unrealized Nine months ended September 30, 2015 Securities available for sale Other securities $ 10 — $ 7 — — — — $ 17 — Other investments Principal investments Direct 102 $ 20 (b) 5 $ (61 ) — — — 66 — Indirect 302 33 (b) 6 (70 ) — — — 271 $ (23 ) (b) Equity and mezzanine investments Direct — 2 (b) — (2 ) — — — — 2 (b) Indirect 10 6 (b) — (7 ) — — — 9 6 (b) Other 4 — — — — — — 4 — Derivative instruments (a) Interest rate 13 5 (c) 1 — — $ 10 (e) $ (7 ) (e) 22 — Commodity — — — — — — — — — Credit 2 (7 ) (c) — 8 — — — 3 — Three months ended September 30, 2015 Securities available for sale Other securities $ 10 — $ 7 — — — — $ 17 — Other investments Principal investments Direct 70 $ 4 (b) 3 $ (11 ) — — — 66 $ 3 (b) Indirect 282 8 (b) 2 (21 ) — — — 271 (8 ) (b) Equity and mezzanine investments Direct — — — — — — — — — Indirect 9 — — — — — — 9 — Other 4 — — — — — — 4 — Derivative instruments (a) Interest rate 16 6 (c) — — — $ 2 (e) $ (2 ) (e) 22 — Commodity — — — — — — — — — Credit 3 (3 ) (c) — 8 $ (5 ) — — 3 — in millions Beginning Gains (Losses) Earnings Purchases Sales Settlements Transfers into Level 3 (d) Transfers (d) End of (f) Unrealized Nine months ended September 30, 2014 Securities available for sale Other securities — — $ 10 — — — — $ 10 — Other investments Principal investments Direct $ 141 $ 9 (b) 1 $ (36 ) — — — 115 $ 18 (b) Indirect 413 49 (b) 8 (117 ) — — — 353 8 (b) Equity and mezzanine investments Direct — — — — — — — — — Indirect 23 (1 ) (b) — (9 ) — — — 13 (1 ) (b) Other 4 — — — — — — 4 — Derivative instruments (a) Interest rate 25 2 (c) 3 (2 ) — $ 7 (e) $ (16 ) (e) 19 — Commodity — — (1 ) — — 1 (e) (1 ) (e) (1 ) — Credit 3 (7 ) (c) — — $ 7 — — 3 — Three months ended September 30, 2014 Securities available for sale Other securities — — $ 10 — — — — $ 10 — Other investments Principal investments Direct $ 146 $ (2 ) (b) — $ (29 ) — — — 115 $ (2 ) (b) Indirect 399 9 (b) 3 (58 ) — — — 353 (4 ) (b) Equity and mezzanine investments Direct — — — — — — — — — Indirect 16 — — (3 ) — — — 13 — Other 4 — — — — — — 4 — Derivative instruments (a) Interest rate 20 — — — — $ 2 (e) $ (3 ) (e) 19 — Commodity 1 — (1 ) — — — (1 ) (e) (1 ) — Credit 3 (2 ) (c) — — $ 2 — — 3 — (a) Amounts represent Level 3 derivative assets less Level 3 derivative liabilities. (b) Realized and unrealized gains and losses on principal investments are reported in “net gains (losses) from principal investing” on the income statement. Realized and unrealized losses on other and private equity and mezzanine investments are reported in “other income” on the income statement. (c) Realized and unrealized gains and losses on derivative instruments are reported in “corporate services income” and “other income” on the income statement. (d) Our policy is to recognize transfers into and transfers out of Level 3 as of the end of the reporting period. (e) Certain derivatives previously classified as Level 2 were transferred to Level 3 because Level 3 unobservable inputs became significant. Certain derivatives previously classified as Level 3 were transferred to Level 2 because Level 3 unobservable inputs became less significant. (f) There were no issuances for the nine-month periods ended September 30, 2015, and September 30, 2014.
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Certain assets and liabilities are measured at fair value on a nonrecurring basis in accordance with GAAP. The adjustments to fair value generally result from the application of accounting guidance that requires assets and liabilities to be recorded at the lower of cost or fair value, or assessed for impairment. There were no liabilities measured at fair value on a nonrecurring basis at September 30, 2015, December 31, 2014, and September 30, 2014. The following table presents our assets measured at fair value on a nonrecurring basis at September 30, 2015, December 31, 2014, and September 30, 2014: September 30, 2015 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A NONRECURRING BASIS Impaired loans — — $ 3 $ 3 Loans held for sale (a) — — — — Accrued income and other assets — — 6 6 Total assets on a nonrecurring basis at fair value — — $ 9 $ 9 December 31, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A NONRECURRING BASIS Impaired loans — — $ 5 $ 5 Loans held for sale (a) — — — — Accrued income and other assets — — 7 7 Total assets on a nonrecurring basis at fair value — — $ 12 $ 12 September 30, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A NONRECURRING BASIS Impaired loans — — $ 6 $ 6 Loans held for sale (a) — — — — Accrued income and other assets — — 4 4 Total assets on a nonrecurring basis at fair value — — $ 10 $ 10 (a) During the first nine months of 2015, we transferred $24 million of commercial and consumer loans and leases at their current fair value from held-for-sale status to the held-to-maturity portfolio, compared to $11 million during 2014, and $10 million during the first nine months of 2014.
Quantitative Information about Level 3 Fair Value Measurements	Quantitative Information about Level 3 Fair Value Measurements The range and weighted-average of the significant unobservable inputs used to fair value our material Level 3 recurring and nonrecurring assets at September 30, 2015, December 31, 2014, and September 30, 2014, along with the valuation techniques used, are shown in the following table: September 30, 2015 dollars in millions Fair Value of Valuation Technique Significant Unobservable Input Range (Weighted-Average) Recurring Other investments — principal investments — direct: $ 66 Individual analysis of the condition of each investment Debt instruments EBITDA multiple N/A (5.40 ) Equity instruments of private companies EBITDA multiple (where applicable) 5.40 - 6.50 (6.40 ) Equity instruments of public companies Market approach Discount N/A (6.00 ) Nonrecurring Impaired loans 3 Fair value of underlying collateral Discount 00.00 - 50.00% (14.00% ) Goodwill 1,060 Discounted cash flow and market data Earnings multiple of peers 11.40 - 15.90 (12.92 ) Equity multiple of peers 1.20 - 1.22 (1.21 ) Control premium 10.00 - 30.00% (19.70% ) Weighted-average cost of capital 13.00 - 14.00% (13.52% ) December 31, 2014 dollars in millions Fair Value of Level 3 Assets Valuation Technique Significant Unobservable Input Range (Weighted-Average) Recurring Other investments — principal investments — direct: $ 102 Individual analysis of the condition of each investment Debt instruments EBITDA multiple 5.40 - 6.00 (5.50 ) Equity instruments of private companies EBITDA multiple (where applicable) 5.50 - 6.20 (5.80 ) Revenue multiple (where applicable) 4.30 - 4.30 (4.30 ) Nonrecurring Impaired loans 5 Fair value of underlying collateral Discount 10.00 - 64.00% (62.00% ) Goodwill 1,057 Discounted cash flow and market data Earnings multiple of peers 11.40 - 15.90 (12.92 ) Equity multiple of peers 1.20 - 1.22 (1.21 ) Control premium 10.00 - 30.00% (19.70% ) Weighted-average cost of capital 13.00 - 14.00% (13.52% ) September 30, 2014 dollars in millions Fair Value of Valuation Technique Significant Unobservable Input Range (Weighted-Average) Recurring Other investments — principal investments — direct: $ 115 Individual analysis of the condition of each investment Debt instruments EBITDA multiple 6.00 - 6.40 (6.30 ) Equity instruments of private companies EBITDA multiple (where applicable) 5.50 - 6.00 (5.70 ) Revenue multiple (where applicable) 4.30 - 4.30 (4.30 ) Nonrecurring Impaired loans 6 Fair value of underlying collateral Discount 10.00 - 90.00% (24.00% ) Goodwill 1,051 Discounted cash flow and market data Earnings multiple of peers 10.10 - 14.40 (11.59 ) Equity multiple of peers 1.17 - 1.29 (1.24 ) Control premium N/A (35.00% ) Weighted-average cost of capital N/A (13.00% )
Fair Value Disclosures of Financial Instruments	Fair Value Disclosures of Financial Instruments The levels in the fair value hierarchy ascribed to our financial instruments and the related carrying amounts at September 30, 2015, December 31, 2014, and September 30, 2014, are shown in the following table. September 30, 2015 Fair Value in millions Carrying Level 1 Level 2 Level 3 Netting Adjustment Total ASSETS Cash and short-term investments (a) $ 2,434 $ 2,434 — — — $ 2,434 Trading account assets (b) 811 4 $ 807 — — 811 Securities available for sale (b) 14,376 11 14,348 $ 17 — 14,376 Held-to-maturity securities (c) 4,936 — 4,940 — — 4,940 Other investments (b) 691 — — 691 — 691 Loans, net of allowance (d) 59,295 — — 57,497 — 57,497 Loans held for sale (b) 916 — — 916 — 916 Derivative assets (b) 793 120 1,593 25 $ (945 ) (f) 793 LIABILITIES Deposits with no stated maturity (a) $ 65,624 — $ 65,624 — — $ 65,624 Time deposits (e) 5,449 $ 427 5,075 — — 5,502 Short-term borrowings (a) 1,084 — 677 — — 677 Long-term debt (e) 10,310 10,146 463 — — 10,609 Derivative liabilities (b) 676 102 1,140 — $ (566 ) (f) 676 December 31, 2014 Fair Value in millions Carrying Level 1 Level 2 Level 3 Netting Adjustment Total ASSETS Cash and short-term investments (a) $ 4,922 $ 4,922 — — — $ 4,922 Trading account assets (b) 750 2 $ 748 — — 750 Securities available for sale (b) 13,360 22 13,328 $ 10 — 13,360 Held-to-maturity securities (c) 5,015 — 4,974 — — 4,974 Other investments (b) 760 2 — 758 — 760 Loans, net of allowance (d) 56,587 — — 54,993 — 54,993 Loans held for sale (b) 734 — — 734 — 734 Derivative assets (b) 609 91 1,536 16 $ (1,034 ) (f) 609 LIABILITIES Deposits with no stated maturity (a) $ 66,135 — $ 66,135 — — $ 66,135 Time deposits (e) 5,863 $ 564 5,361 — — 5,925 Short-term borrowings (a) 998 — 998 — — 998 Long-term debt (e) 7,875 7,625 626 — — 8,251 Derivative liabilities (b) 784 77 1,248 $ 1 $ (542 ) (f) 784 September 30, 2014 Fair Value in millions Carrying Level 1 Level 2 Level 3 Netting Total ASSETS Cash and short-term investments (a) $ 2,993 $ 2,993 — — — $ 2,993 Trading account assets (b) 965 13 $ 952 — — 965 Securities available for sale (b) 12,245 22 12,213 $ 10 — 12,245 Held-to-maturity securities (c) 4,997 — 4,911 — — 4,911 Other investments (b) 822 — — 822 — 822 Loans, net of allowance (d) 55,351 — — 53,996 — 53,996 Loans held for sale (b) 784 — — 784 — 784 Mortgage servicing assets (e) 308 — — 370 — 370 Derivative assets (b) 413 73 931 22 $ (613 ) (f) 413 LIABILITIES Deposits with no stated maturity (a) $ 62,028 — $ 62,028 — — $ 62,028 Time deposits (e) 6,428 $ 556 5,937 — — 6,493 Short-term borrowings (a) 1,653 6 1,647 — — 1,653 Long-term debt (e) 7,172 6,854 1,202 — — 8,056 Derivative liabilities (b) 384 55 721 $ 1 $ (393 ) (f) 384 Valuation Methods and Assumptions (a) Fair value equals or approximates carrying amount. The fair value of deposits with no stated maturity does not take into consideration the value ascribed to core deposit intangibles. (b) Information pertaining to our methodology for measuring the fair values of these assets and liabilities is included in the sections entitled “Qualitative Disclosures of Valuation Techniques” and “Assets Measured at Fair Value on a Nonrecurring Basis” in this note. (c) Fair values of held-to-maturity securities are determined by using models that are based on security-specific details, as well as relevant industry and economic factors. The most significant of these inputs are quoted market prices, interest rate spreads on relevant benchmark securities, and certain prepayment assumptions. We review the valuations derived from the models to ensure they are reasonable and consistent with the values placed on similar securities traded in the secondary markets. (d) The fair value of loans is based on the present value of the expected cash flows. The projected cash flows are based on the contractual terms of the loans, adjusted for prepayments and use of a discount rate based on the relative risk of the cash flows, taking into account the loan type, maturity of the loan, liquidity risk, servicing costs, and a required return on debt and capital. In addition, an incremental liquidity discount is applied to certain loans, using historical sales of loans during periods of similar economic conditions as a benchmark. The fair value of loans includes lease financing receivables at their aggregate carrying amount, which is equivalent to their fair value. (e) Fair values of time deposits and long-term debt are based on discounted cash flows utilizing relevant market inputs. (f) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with applicable accounting guidance. The net basis takes into account the impact of bilateral collateral and master netting agreements that allow us to settle all derivative contracts with a single counterparty on a net basis and to offset the net derivative position with the related cash collateral. Total derivative assets and liabilities include these netting adjustments.
Private Equity and Mezzanine Investments [Member]
Fair Value of Direct and Indirect Investments, Related Unfunded Commitments and Financial Support Provided	The following table presents the fair value of our indirect investments and related unfunded commitments at September 30, 2015. We did not provide any financial support to investees related to our direct and indirect investments for the nine months ended September 30, 2015, and September 30, 2014. September 30, 2015 Unfunded in millions Fair Value Commitments INVESTMENT TYPE Indirect investments Passive funds (a) $ 9 $ 1 Total $ 9 $ 1 (a) We invest in passive funds, which are multi-investor private equity funds. These investments can never be redeemed. Instead, distributions are received through the liquidation of the underlying investments in the funds. Some funds have no restrictions on sale, while others require investors to remain in the fund until maturity. The funds will be liquidated over a period of one to four years. The purpose of KREEC’s funding is to allow funds to make additional investments and keep a certain market value threshold in the funds. KREEC is obligated to provide financial support, as all investors are required, to fund based on their ownership percentage, as noted in the Limited Partnership Agreements.
Principal Investments [Member]
Fair Value of Direct and Indirect Investments, Related Unfunded Commitments and Financial Support Provided	The following table presents the fair value of our direct and indirect principal investments and related unfunded commitments at September 30, 2015, as well as financial support provided for the three and nine months ended September 30, 2015, and September 30, 2014: Financial support provided Three months ended September 30, Nine months ended September 30, September 30, 2015 2015 2014 2015 2014 Fair Unfunded Funded Funded Funded Funded Funded Funded Funded Funded in millions Value Commitments Commitments Other Commitments Other Commitments Other Commitments Other INVESTMENT TYPE Direct investments (a) $ 66 — — $ — — — — $ 2 — $ 2 Indirect investments (b) 271 $ 53 $ 2 — $ 3 — $ 7 — $ 10 — Total $ 337 $ 53 $ 2 $ — $ 3 — $ 7 $ 2 $ 10 $ 2 (a) Our direct investments consist of equity and debt investments directly in independent business enterprises. Operations of the business enterprises are handled by management of the portfolio company. The purpose of funding these enterprises is to provide financial support for business development and acquisition strategies. We infuse equity capital based on an initial contractual cash contribution and later from additional requests on behalf of the companies’ management. (b) Our indirect investments consist of buyout funds, venture capital funds, and fund of funds. These investments are generally not redeemable. Instead, distributions are received through the liquidation of the underlying investments of the fund. An investment in any one of these funds typically can be sold only with the approval of the fund’s general partners. We estimate that the underlying investments of the funds will be liquidated over a period of one to nine years. The purpose of funding our capital commitments to these investments is to allow the funds to make additional follow-on investments and pay fund expenses until the fund dissolves. We, and all other investors in the fund, are obligated to fund the full amount of our respective capital commitments to the fund based on our and their respective ownership percentages, as noted in the applicable Limited Partnership Agreement.

Securities (Tables)

Securities (Tables)	9 Months Ended
	Sep. 30, 2015
Investments, Debt and Equity Securities [Abstract]
Details of Securities	The amortized cost, unrealized gains and losses, and approximate fair value of our securities available for sale and held-to-maturity securities are presented in the following tables. Gross unrealized gains and losses represent the difference between the amortized cost and the fair value of securities on the balance sheet as of the dates indicated. Accordingly, the amount of these gains and losses may change in the future as market conditions change. September 30, 2015 in millions Amortized Gross Gross Fair SECURITIES AVAILABLE FOR SALE States and political subdivisions $ 14 $ 1 — $ 15 Collateralized mortgage obligations 11,938 127 $ 62 12,003 Other mortgage-backed securities 2,309 22 1 2,330 Other securities 27 1 — 28 Total securities available for sale $ 14,288 $ 151 $ 63 $ 14,376 HELD-TO-MATURITY SECURITIES Collateralized mortgage obligations $ 4,299 $ 24 23 $ 4,300 Other mortgage-backed securities 617 3 — 620 Other securities 20 — — 20 Total held-to-maturity securities $ 4,936 $ 27 $ 23 $ 4,940 December 31, 2014 in millions Amortized Gross Gross Fair SECURITIES AVAILABLE FOR SALE States and political subdivisions $ 22 $ 1 — $ 23 Collateralized mortgage obligations 11,310 96 $ 136 11,270 Other mortgage-backed securities 2,004 32 1 2,035 Other securities 29 3 — 32 Total securities available for sale $ 13,365 $ 132 $ 137 $ 13,360 HELD-TO-MATURITY SECURITIES Collateralized mortgage obligations $ 4,755 $ 15 $ 57 $ 4,713 Other mortgage-backed securities 240 1 — 241 Other securities 20 — — 20 Total held-to-maturity securities $ 5,015 $ 16 $ 57 $ 4,974 September 30, 2014 in millions Amortized Gross Gross Fair SECURITIES AVAILABLE FOR SALE States and political subdivisions $ 26 $ 1 — $ 27 Collateralized mortgage obligations 10,096 109 $ 196 10,009 Other mortgage-backed securities 2,156 24 3 2,177 Other securities 28 4 — 32 Total securities available for sale $ 12,306 $ 138 $ 199 $ 12,245 HELD-TO-MATURITY SECURITIES Collateralized mortgage obligations $ 4,977 $ 10 $ 96 $ 4,891 Other securities 20 — — 20 Total held-to-maturity securities $ 4,997 $ 10 $ 96 $ 4,911
Available for Sale Securities (Unrealized Loss Position)	The following table summarizes our securities that were in an unrealized loss position as of September 30, 2015, December 31, 2014, and September 30, 2014. Duration of Unrealized Loss Position Less than 12 Months 12 Months or Longer Total in millions Fair Value Gross Fair Gross Fair Value Gross September 30, 2015 Securities available for sale: Collateralized mortgage obligations $ 770 $ 3 $ 3,348 $ 59 $ 4,118 $ 62 Other mortgage-backed securities 420 1 — — 420 1 Other securities (a) 2 — 3 — 5 — Held-to-maturity: Collateralized mortgage obligations 214 1 1,355 22 1,569 23 Other mortgage-backed securities 110 — — — 110 — Other securities (b) 4 — — — 4 — Total temporarily impaired securities $ 1,520 $ 5 $ 4,706 $ 81 $ 6,226 $ 86 December 31, 2014 Securities available for sale: Collateralized mortgage obligations $ 3,019 $ 52 $ 2,932 $ 84 $ 5,951 $ 136 Other mortgage-backed securities — — 78 1 78 1 Other securities (a) 4 — 2 — 6 — Held-to-maturity: Collateralized mortgage obligations 1,005 11 1,994 46 2,999 57 Total temporarily impaired securities $ 4,028 $ 63 $ 5,006 $ 131 $ 9,034 $ 194 September 30, 2014 Securities available for sale: Collateralized mortgage obligations $ 605 $ 7 $ 4,379 $ 189 $ 4,984 $ 196 Other mortgage-backed securities 811 1 81 2 892 3 Other securities (a) 1 — 2 — 3 — Held-to-maturity: Collateralized mortgage obligations 1,288 13 2,342 83 3,630 96 Total temporarily impaired securities $ 2,705 $ 21 $ 6,804 $ 274 $ 9,509 $ 295 (a) Gross unrealized losses totaled less than $1 million for other securities available for sale as of September 30, 2015, December 31, 2014, and September 30, 2014. (b) Gross unrealized losses totaled less than $1 million for other securities held-to-maturity as of September 30, 2015.
Cumulative Credit Portion of Impairments on Debt Securities	As shown in the following table, we did not have any impairment losses recognized in earnings for the three months ended September 30, 2015. Three months ended September 30, 2015 in millions Balance at June 30, 2015 $ 4 Impairment recognized in earnings — Balance at September 30, 2015 $ 4
Available for Sale Securities Realized Gains and Losses	Realized gains and losses related to securities available for sale were as follows: Nine months ended September 30, 2015 in millions Realized gains — Realized losses $ 1 Net securities gains (losses) $ (1 )
Securities by Maturity	Actual maturities may differ from expected or contractual maturities since borrowers have the right to prepay obligations with or without prepayment penalties. Securities Available for Sale Held-to-Maturity September 30, 2015 in millions Amortized Fair Amortized Fair Due in one year or less $ 297 $ 302 $ 9 $ 9 Due after one through five years 12,659 12,735 4,310 4,311 Due after five through ten years 1,329 1,336 617 620 Due after ten years 3 3 — — Total $ 14,288 $ 14,376 $ 4,936 $ 4,940

Derivatives and Hedging Activ36

Derivatives and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Fair Values, Volume of Activity and Gain (Loss) Information Related to Derivative Instruments	Our derivative instruments are included in “derivative assets” or “derivative liabilities” on the balance sheet, as indicated in the following table: September 30, 2015 December 31, 2014 September 30, 2014 Fair Value Fair Value Fair Value Notional Derivative Derivative Notional Derivative Derivative Notional Derivative Derivative in millions Amount Assets Liabilities Amount Assets Liabilities Amount Assets Liabilities Derivatives designated as hedging instruments: Interest rate $ 17,910 $ 394 $ 12 $ 15,095 $ 272 $ 26 $ 13,946 $ 237 $ 44 Foreign exchange 319 11 — 371 8 — 413 13 — Total 18,229 405 12 15,466 280 26 14,359 250 44 Derivatives not designated as hedging instruments: Interest rate 57,006 725 644 43,771 665 618 42,088 608 572 Foreign exchange 6,161 119 112 4,024 85 81 4,433 69 64 Commodity 1,394 482 469 1,544 608 594 1,780 95 90 Credit 580 7 5 512 5 7 618 4 7 Total 65,141 1,333 1,230 49,851 1,363 1,300 48,919 776 733 Netting adjustments (a) — (945 ) (566 ) — (1,034 ) (542 ) — (613 ) (393 ) Net derivatives in the balance sheet 83,370 793 676 65,317 609 784 63,278 413 384 Other collateral (b) — (113 ) (232 ) — (155 ) (241 ) — (71 ) (268 ) Net derivative amounts $ 83,370 $ 680 $ 444 $ 65,317 $ 454 $ 543 $ 63,278 $ 342 $ 116 (a) Netting adjustments represent the amounts recorded to convert our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. (b) Other collateral represents the amount that cannot be used to offset our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. The other collateral consists of securities and is exchanged under bilateral collateral and master netting agreements that allow us to offset the net derivative position with the related collateral. The application of the other collateral cannot reduce the net derivative position below zero. Therefore, excess other collateral, if any, is not reflected above.
Pre-Tax Net Gains (Losses) on Fair Value Hedges	The following table summarizes the pre-tax net gains (losses) on our fair value hedges for the nine-month periods ended September 30, 2015, and September 30, 2014, and where they are recorded on the income statement. Nine months ended September 30, 2015 Net Gains Net Gains Income Statement Location of (Losses) on Income Statement Location of (Losses) on in millions Net Gains (Losses) on Derivative Derivative Hedged Item Net Gains (Losses) on Hedged Item Hedged Item Interest rate Other income $ 66 Long-term debt Other income $ (66 ) (a) Interest rate Interest expense – Long-term debt 91 Total $ 157 $ (66 ) Nine months ended September 30, 2014 Net Gains Net Gains Income Statement Location of (Losses) on Income Statement Location of (Losses) on in millions Net Gains (Losses) on Derivative Derivative Hedged Item Net Gains (Losses) on Hedged Item Hedged Item Interest rate Other income $ (21 ) Long-term debt Other income $ 21 (a) Interest rate Interest expense – Long-term debt 91 Total $ 70 $ 21 (a) Net gains (losses) on hedged items represent the change in fair value caused by fluctuations in interest rates.
Derivative Instrument Cash Flow Hedge Earning Recognized by Income Statement Location	The following table summarizes the pre-tax net gains (losses) on our cash flow and net investment hedges for the nine-month periods ended September 30, 2015, and September 30, 2014, and where they are recorded on the income statement. The table includes the effective portion of net gains (losses) recognized in OCI during the period, the effective portion of net gains (losses) reclassified from OCI into income during the current period, and the portion of net gains (losses) recognized directly in income, representing the amount of hedge ineffectiveness. Nine months ended September 30, 2015 in millions Net Gains (Losses) Income Statement Net Gains (Effective Portion) Income Statement (Ineffective Portion) Net Gains Cash Flow Hedges Interest rate $ 147 Interest income – Loans $ 73 Other income — Interest rate (3 ) Interest expense – Long-term debt (3 ) Other income — Interest rate (3 ) Investment banking and debt placement fees — Other income — Net Investment Hedges Foreign exchange contracts 29 Other Income — Other income — Total $ 170 $ 70 — Nine months ended September 30, 2014 in millions Net Gains (Losses) Income Statement Net Gains (Losses) Reclassified Income Statement Income Net Gains Cash Flow Hedges Interest rate $ 27 Interest income – Loans $ 49 Other income — Interest rate (5 ) Interest expense – Long-term debt (3 ) Other income — Interest rate (1 ) Investment banking and debt placement fees — Other income — Net Investment Hedges Foreign exchange contracts 17 Other Income — Other income — Total $ 38 $ 46 —
After-Tax Change in AOCI Resulting from Cash Flow Hedges	The after-tax change in AOCI resulting from cash flow and net investment hedges is as follows: in millions December 31, 2015 Hedging Activity Reclassification September 30, AOCI resulting from cash flow and net investment hedges $ (8 ) $ 107 $ (44 ) $ 55
Pre-Tax Net Gains (Losses) on Derivatives Not Designated as Hedging Instruments	The following table summarizes the pre-tax net gains (losses) on our derivatives that are not designated as hedging instruments for the nine-month periods ended September 30, 2015, and September 30, 2014, and where they are recorded on the income statement. Nine months ended September 30, 2015 Nine months ended September 30, 2014 Corporate Corporate Services Other Services Other in millions Income Income Total Income Income Total NET GAINS (LOSSES) Interest rate $ 18 — $ 18 $ 11 — $ 11 Foreign exchange 27 — 27 25 — 25 Commodity 5 — 5 3 — 3 Credit — $ (10 ) (10 ) — $ (16 ) (16 ) Total net gains (losses) $ 50 $ (10 ) $ 40 $ 39 $ (16 ) $ 23
Largest Exposure to Individual Counterparty	The following table summarizes our largest exposure to an individual counterparty at the dates indicated. in millions September 30, December 31, September 30, Largest gross exposure (derivative asset) to an individual counterparty $ 137 $ 133 $ 106 Collateral posted by this counterparty 55 100 44 Derivative liability with this counterparty 78 31 103 Collateral pledged to this counterparty — — 47 Net exposure after netting adjustments and collateral 4 2 6
Fair Value of Derivative Assets by Type	The following table summarizes the fair value of our derivative assets by type at the dates indicated. These assets represent our gross exposure to potential loss after taking into account the effects of bilateral collateral and master netting agreements and other means used to mitigate risk. in millions September 30, December 31, September 30, Interest rate $ 807 $ 607 $ 556 Foreign exchange 48 41 39 Commodity 328 478 47 Credit 4 1 1 Derivative assets before collateral 1,187 1,127 643 Less: Related collateral 394 518 230 Total derivative assets $ 793 $ 609 $ 413
Fair Value of Credit Derivatives Purchased and Sold	The following table summarizes the fair value of our credit derivatives purchased and sold by type as of September 30, 2015, December 31, 2014, and September 30, 2014. The fair value of credit derivatives presented below does not take into account the effects of bilateral collateral or master netting agreements. September 30, 2015 December 31, 2014 September 30, 2014 in millions Purchased Sold Net Purchased Sold Net Purchased Sold Net Single-name credit default swaps $ (2 ) — $ (2 ) $ (3 ) — $ (3 ) $ (1 ) — $ (1 ) Traded credit default swap indices 4 — 4 1 — 1 (2 ) — (2 ) Other (a) — — — — — — — — — Total credit derivatives $ 2 — $ 2 $ (2 ) — $ (2 ) $ (3 ) — $ (3 ) (a) As of September 30, 2015, December 31, 2014, and September 30, 2014, the fair value of other credit derivatives sold totaled less than $1 million.
Credit Derivatives Sold and Held	The following table provides information on the types of credit derivatives sold by us and held on the balance sheet at September 30, 2015, December 31, 2014, and September 30, 2014. The notional amount represents the maximum amount that the seller could be required to pay. The payment/performance risk assessment is based on the default probabilities for the underlying reference entities’ debt obligations using a Moody’s credit ratings matrix known as Moody’s “Idealized” Cumulative Default Rates. The payment/performance risk shown in the table represents a weighted-average of the default probabilities for all reference entities in the respective portfolios. These default probabilities are directly correlated to the probability that we will have to make a payment under the credit derivative contracts. September 30, 2015 December 31, 2014 September 30, 2014 Average Payment / Average Payment / Average Payment / Notional Term Performance Notional Term Performance Notional Term Performance dollars in millions Amount (Years) Risk Amount (Years) Risk Amount (Years) Risk Single-name credit default swaps — — — $ 5 .72 .87 % $ 5 .97 .87 % Other $ 9 2.95 7.45 % 6 2.89 9.58 6 2.92 5.59 Total credit derivatives sold $ 9 — — $ 11 — — $ 11 — —
Credit Risk Contingent Feature	The following table summarizes the additional cash and securities collateral that KeyBank would have been required to deliver under the ISDA Master Agreements had the credit risk contingent features been triggered for the derivative contracts in a net liability position as of September 30, 2015, December 31, 2014, and September 30, 2014. The additional collateral amounts were calculated based on scenarios under which KeyBank’s ratings are downgraded one, two, or three ratings as of September 30, 2015, December 31, 2014, and September 30, 2014, and take into account all collateral already posted. A similar calculation was performed for KeyCorp, and no additional collateral would have been required as of September 30, 2015, while additional collateral of less than $1 million as of December 31, 2014, and $3 million as of September 30, 2014, would have been required. For more information about the credit ratings for KeyBank and KeyCorp, see the discussion under the heading “Factors affecting liquidity” in the section entitled “Liquidity risk management” in Item 2 of this report. September 30, 2015 December 31, 2014 September 30, 2014 in millions Moody’s S&P Moody’s S&P Moody’s S&P KeyBank’s long-term senior unsecured credit ratings A3 A- A3 A- A3 A- One rating downgrade $ 4 $ 4 $ 1 $ 1 $ 1 $ 1 Two rating downgrades 5 5 1 1 4 4 Three rating downgrades 6 6 3 3 6 6

Mortgage Servicing Assets (Tabl

Mortgage Servicing Assets (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Changes in Carrying Amount of Mortgage Servicing Assets	We originate and periodically sell commercial mortgage loans but continue to service those loans for the buyers. We also may purchase the right to service commercial mortgage loans for other lenders. We record a servicing asset if we purchase or retain the right to service loans in exchange for servicing fees that exceed the going market servicing rate and are considered more than adequate compensation for servicing. Changes in the carrying amount of mortgage servicing assets are summarized as follows: Nine months ended September 30, in millions 2015 2014 Balance at beginning of period $ 323 $ 332 Servicing retained from loan sales 39 19 Purchases 29 33 Amortization (71 ) (76 ) Balance at end of period $ 320 $ 308 Fair value at end of period $ 427 $ 370
Schedule of Range and Weighted-Average of Significant Unobservable Inputs	The range and weighted-average of the significant unobservable inputs used to fair value our mortgage servicing assets at September 30, 2015, and September 30, 2014, along with the valuation techniques, are shown in the following table: September 30, 2015 dollars in millions Valuation Technique Significant Unobservable Input Range (Weighted-Average) Mortgage servicing assets Discounted cash flow Prepayment speed 1.70 - 16.30% (4.90%) Expected defaults 1.00 - 3.00% (1.70%) Residual cash flows discount rate 7.00 - 15.00% (7.80%) Escrow earn rate 0.90 - 3.50% (2.30%) Servicing cost $150 - $2,719 ($1,151) Loan assumption rate 0.00 - 3.00% (1.37%) Percentage late 0.00 - 2.00% (0.33%) September 30, 2014 dollars in millions Valuation Technique Significant Unobservable Input Range (Weighted-Average) Mortgage servicing assets Discounted cash flow Prepayment speed 1.90 - 12.30% (5.90%) Expected defaults 1.00 - 3.00% (1.90%) Residual cash flows discount rate 7.00 - 14.10% (7.80%) Escrow earn rate 0.50 - 3.10% (1.70%) Servicing cost $150 - $2,700 ($1,053) Loan assumption rate 0.20 - 3.00% (1.52%) Percentage late 0.00 - 2.00% (0.32%)

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2015
Equity Method Investments and Joint Ventures [Abstract]
Variable Interest Entities Information	During the third quarter of 2015, we noted that not all liabilities related to our unconsolidated VIEs were captured in the table below. The amounts in the “Total Liabilities” column for our unconsolidated VIEs were revised to incorporate all liabilities for the periods ended December 31, 2014, and September 30, 2014. Consolidated VIEs Unconsolidated VIEs Total Total Total Total Maximum in millions Assets Liabilities Assets Liabilities Exposure to Loss September 30, 2015 LIHTC funds $ 1 $ 1 $ 26 $ 14 — LIHTC investments KCDC N/A N/A 834 271 $ 543 KAHC N/A N/A 260 231 14 December 31, 2014 LIHTC funds $ 1 $ 1 $ 55 $ 36 — LIHTC investments KCDC N/A N/A 764 258 $ 507 KAHC N/A N/A 470 462 14 September 30, 2014 LIHTC funds $ 1 $ 2 $ 55 $ 36 — LIHTC investments KCDC N/A N/A 775 263 $ 498 KAHC N/A N/A 470 462 9

Acquisitions and Discontinued39

Acquisitions and Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2015
Business Combinations [Abstract]
Components of Income (Loss) from Discontinued Operations, Net of Taxes for Education Lending Business	The components of “income (loss) from discontinued operations, net of taxes” for the education lending business are as follows: Three months ended September 30, Nine months ended September 30, in millions 2015 2014 2015 2014 Net interest income $ 9 $ 21 $ 29 $ 67 Provision for credit losses 7 5 9 15 Net interest income after provision for credit losses 2 16 20 52 Noninterest income (2 ) (41 ) 1 (111 ) Noninterest expense 5 7 13 19 Income (loss) before income taxes (5 ) (32 ) 8 (78 ) Income taxes (2 ) (12 ) 3 (29 ) Income (loss) from discontinued operations, net of taxes (a) $ (3 ) $ (20 ) $ 5 $ (49 ) (a) Includes after-tax charges of $7 million and $9 million for the three-month periods ended September 30, 2015, and September 30, 2014, respectively, and $18 million and $26 million for the nine-month periods ended September 30, 2015, and September 30, 2014, respectively, determined by applying a matched funds transfer pricing methodology to the liabilities assumed necessary to support the discontinued operations.
Components of Assets of Education Lending Business	The discontinued assets of our education lending business included on the balance sheet are as follows. There were no discontinued liabilities for the periods presented below. September 30, December 31, September 30, in millions 2015 2014 2014 Held-to-maturity securities $ 1 $ 1 $ 1 Portfolio loans at fair value — 191 201 Loans, net of unearned income (a) 1,891 2,104 2,174 Less: Allowance for loan and lease losses 23 29 31 Net loans 1,868 2,266 2,344 Portfolio loans held for sale at fair value 169 — — Accrued income and other assets 33 38 40 Total assets $ 2,071 $ 2,305 $ 2,385 (a) At September 30, 2015, December 31, 2014, and September 30, 2014, unearned income was less than $1 million.
Quantitative Information about Level 3 Fair Value Measurements	The following table shows the significant unobservable inputs used to measure the fair value of the portfolio loans held for sale and portfolio loans accounted for at fair value at September 30, 2015, December 31, 2014, and September 30, 2014: September 30, 2015 dollars in millions Fair Value of Level 3 Valuation Technique Significant Range Portfolio loans held for sale accounted for at fair value $ 169 Market approach Indicative bids 84.50 - 104.00% December 31, 2014 dollars in millions Fair Value of Level 3 Valuation Technique Significant Range (Weighted-Average) Portfolio loans accounted for at fair value $ 191 Discounted cash flow Prepayment speed 5.40 - 5.60% (5.50%) Loss severity 2.00 - 77.00% (25.66%) Discount rate 3.90 - 4.00% (3.92%) Default rate .86 - 1.70% (1.12%) September 30, 2014 dollars in millions Fair Value of Level 3 Valuation Technique Significant Range (Weighted-Average) Portfolio loans accounted for at fair value $ 201 Discounted cash flow Prepayment speed 5.00 - 5.80% (5.25%) Loss severity 2.00 - 77.00% (25.71%) Discount rate 3.60 - 3.90% (3.69%) Default rate .93 - 1.91% (1.24%)
Principal and Fair Value Amounts for Portfolio Loans Held for Sale at Fair Value, Portfolio Loans at Carrying Value, and Portfolio Loans at Fair Value	The following table shows the principal and fair value amounts for our portfolio loans held for sale at fair value, portfolio loans at carrying value, and portfolio loans at fair value at September 30, 2015, December 31, 2014, and September 30, 2014. Our policies for determining past due loans, placing loans on nonaccrual, applying payments on nonaccrual loans, and resuming accrual of interest are disclosed in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Nonperforming Loans” beginning on page 116 of our 2014 Form 10-K. September 30, 2015 December 31, 2014 September 30, 2014 in millions Principal Fair Value Principal Fair Value Principal Fair Value Portfolio loans held for sale at fair value Accruing loans past due 90 days or more $ 5 $ 4 — — — — Portfolio loans at carrying value Accruing loans past due 90 days or more $ 26 N/A $ 29 N/A $ 31 N/A Loans placed on nonaccrual status 8 N/A 11 N/A 9 N/A Portfolio loans at fair value Accruing loans past due 90 days or more — — $ 5 $ 5 $ 5 $ 5
Portfolio Loans Held for Sale at Fair Value and Portfolio Loans at Fair Value and Related Contractual Amounts	The following table shows the portfolio loans held for sale at fair value and portfolio loans at fair value and their related contractual amounts at September 30, 2015, December 31, 2014, and September 30, 2014. September 30, 2015 December 31, 2014 September 30, 2014 in millions Contractual Fair Contractual Fair Contractual Fair ASSETS Portfolio loans held for sale $ 173 $ 169 — — — — Portfolio loans — — $ 192 $ 191 $ 199 $ 201
Consolidated Assets at Fair Value on Recurring Basis	The following tables present the assets of the portfolio loans held for sale and portfolio loans measured at fair value on a recurring basis at September 30, 2015, December 31, 2014, and September 30, 2014. September 30, 2015 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Portfolio loans held for sale — — $ 169 $ 169 Total assets on a recurring basis at fair value — — $ 169 $ 169 December 31, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Portfolio loans — — $ 191 $ 191 Total assets on a recurring basis at fair value — — $ 191 $ 191 September 30, 2014 in millions Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A RECURRING BASIS Portfolio loans — — $ 201 $ 201 Total assets on a recurring basis at fair value — — $ 201 $ 201
Change in Fair Values of Level 3 Portfolio Loans Held for Sale, Portfolio Loans, and Consolidated Education Loan Securitization Trusts	The following table shows the change in the fair values of the Level 3 portfolio loans held for sale, portfolio loans, and consolidated education loan securitization trusts for the three- and nine-month periods ended September 30, 2015, and September 30, 2014. Portfolio Student Portfolio Trust Trust Trust Loans Held Student Student Other Trust Other in millions For Sale Loans Loans Assets Securities Liabilities Balance at December 31, 2014 — $ 191 — — — — Gains (losses) recognized in earnings (a) $ (4 ) 1 — — — — Settlements (6 ) (13 ) — — — — Loans transferred to held for sale 179 (179 ) — — — — Balance at September 30, 2015 (b) $ 169 — — — — — Balance at June 30, 2015 $ 179 — — — — — Gains (losses) recognized in earnings (a) (4 ) — — — — — Settlements (6 ) — — — — — Balance at September 30, 2015 (b) $ 169 — — — — — Balance at December 31, 2013 — $ 147 $ 1,960 $ 20 $ 1,834 $ 20 Gains (losses) recognized in earnings (a) — (4 ) (34 ) — 33 — Purchases — 74 — — — — Sales — — (74 ) — — — Settlements — (16 ) (202 ) (1 ) (278 ) (3 ) Transfers out due to deconsolidation — — (1,650 ) (19 ) (1,589 ) (17 ) Balance at September 30, 2014 (b) — $ 201 — — — — Balance at June 30, 2014 — $ 209 $ 1,711 $ 19 $ 1,660 $ 17 Gains (losses) recognized in earnings (a) — — — — — — Purchases — — — — — — Sales — — — — — — Settlements — (8 ) (61 ) — (71 ) — Transfers out due to deconsolidation — — (1,650 ) (19 ) (1,589 ) (17 ) Balance at September 30, 2014 (b) — $ 201 — — — — (a) Gains (losses) were driven primarily by fair value adjustments. (b) There were no issuances, transfers into Level 3, or transfers out of Level 3 for the three- and nine-month periods ended September 30, 2015. There were no issuances or transfers into Level 3 for the three- and nine-month periods ended September 30, 2014.
Components of Income (Loss) from Discontinued Operations, Net of Taxes	The results of this discontinued business are included in “income (loss) from discontinued operations, net of taxes” on the income statement. The components of “income (loss) from discontinued operations, net of taxes” for Victory, which includes the additional gain recorded as of March 31, 2014, on the sale of this business, are as follows: Three months ended Nine months ended in millions 2015 2014 2015 2014 Net interest income — $ 5 — $ 7 Noninterest income — — — 10 Noninterest expense — — — — Income (loss) before income taxes — 5 — 17 Income taxes — 2 — 7 Income (loss) from discontinued operations, net of taxes — $ 3 — $ 10 The results of this discontinued business are included in “income (loss) from discontinued operations, net of taxes” on the income statement. The components of “income (loss) from discontinued operations, net of taxes” for Austin are as follows: Three months ended September 30, Nine months ended in millions 2015 2014 2015 2014 Noninterest expense — — — $ 4 Income (loss) before income taxes — — — (4 ) Income taxes — — — (2 ) Income (loss) from discontinued operations, net of taxes — — — $ (2 )
Components of Assets and Liabilities from Discontinued Operations	The discontinued assets of Victory included on the balance sheet are as follows. There were no discontinued liabilities for the periods presented below. September 30, December 31, September 30, in millions 2015 2014 2014 Seller note (a) — — $ 17 Total assets — — $ 17 (a) At September 30, 2014, the only remaining asset of Victory was the Seller note. The Seller note was paid off during the fourth quarter of 2014. The discontinued assets and liabilities of Austin included on the balance sheet are as follows: September 30, December 31, September 30, in millions 2015 2014 2014 Cash and due from banks $ 15 $ 19 $ 19 Total assets $ 15 $ 19 $ 19 Accrued expense and other liabilities — $ 3 $ 3 Total liabilities — $ 3 $ 3
Combined Results of Discontinued Operations	Combined discontinued operations. Three months ended Nine months ended in millions 2015 2014 2015 2014 Net interest income $ 9 $ 26 $ 29 $ 74 Provision for credit losses 7 5 9 15 Net interest income after provision for credit losses 2 21 20 59 Noninterest income (2 ) (41 ) 1 (101 ) Noninterest expense 5 7 13 23 Income (loss) before income taxes (5 ) (27 ) 8 (65 ) Income taxes (2 ) (10 ) 3 (24 ) Income (loss) from discontinued operations, net of taxes (a) $ (3 ) $ (17 ) $ 5 $ (41 ) (a) Includes after-tax charges of $7 million and $9 million for the three-month periods ended September 30, 2015, and September 30, 2014, respectively, and $18 million and $26 million for the nine-month periods ended September 30, 2015, and September 30, 2014, respectively, determined by applying a matched funds transfer pricing methodology to the liabilities assumed necessary to support the discontinued operations.
Combined Assets and Liabilities of Discontinued Operations	The combined assets and liabilities of the discontinued operations are as follows: September 30, December 31, September 30, in millions 2015 2014 2014 Cash and due from banks $ 15 $ 19 $ 19 Held-to-maturity securities 1 1 1 Seller note — — 17 Portfolio loans at fair value — 191 201 Loans, net of unearned income (a) 1,891 2,104 2,174 Less: Allowance for loan and lease losses 23 29 31 Net loans 1,868 2,266 2,344 Portfolio loans held for sale at fair value 169 — — Accrued income and other assets 33 38 40 Total assets $ 2,086 $ 2,324 $ 2,421 Accrued expense and other liabilities — $ 3 $ 3 Total liabilities — $ 3 $ 3 (a) At September 30, 2015, December 31, 2014, and September 30, 2014, unearned income was less than $1 million.

Securities Financing Activiti40

Securities Financing Activities (Tables)	9 Months Ended
	Sep. 30, 2015
Brokers and Dealers [Abstract]
Summarized Securities Financing Agreements	The following table summarizes our securities financing agreements at September 30, 2015, December 31, 2014, and September 30, 2014: September 30, 2015 Gross Amount Presented in Netting Net in millions Balance Sheet Adjustments (a) Collateral (b) Amounts Offsetting of financial assets: Reverse repurchase agreements $ 4 $ (4 ) — — Total $ 4 $ (4 ) — — Offsetting of financial liabilities: Repurchase agreements (c) $ 6 $ (4 ) $ (2 ) — Total $ 6 $ (4 ) $ (2 ) — December 31, 2014 Gross Amount Presented in Netting Net in millions Balance Sheet Adjustments (a) Collateral (b) Amounts Offsetting of financial assets: Reverse repurchase agreements $ 3 $ (1 ) $ (2 ) — Total $ 3 $ (1 ) $ (2 ) — Offsetting of financial liabilities: Repurchase agreements $ 1 $ (1 ) — — Total $ 1 $ (1 ) — — September 30, 2014 Gross Amount Presented in Netting Net in millions Balance Sheet Adjustments (a) Collateral (b) Amounts Offsetting of financial assets: Reverse repurchase agreements $ 6 $ (4 ) $ (2 ) — Total $ 6 $ (4 ) $ (2 ) — Offsetting of financial liabilities: Repurchase agreements $ 4 $ (4 ) — — Total $ 4 $ (4 ) — — (a) Netting adjustments take into account the impact of master netting agreements that allow us to settle with a single counterparty on a net basis. (b) These adjustments take into account the impact of bilateral collateral agreements that allow us to offset the net positions with the related collateral. The application of collateral cannot reduce the net position below zero. Therefore, excess collateral, if any, is not reflected above. (c) Repurchase agreements are collateralized by U.S. Treasury securities and contracted on an overnight basis.

Employee Benefits (Tables)

Employee Benefits (Tables)	9 Months Ended
	Sep. 30, 2015
Pension Plans [Member]
Summary of Defined Benefit Plans Cost (Benefit) for All Funded and Unfunded Plans	The components of net pension cost (benefit) for all funded and unfunded plans are as follows: Three months ended Nine months ended in millions 2015 2014 2015 2014 Interest cost on PBO $ 10 $ 12 $ 30 $ 36 Expected return on plan assets (14 ) (17 ) (42 ) (51 ) Amortization of losses 4 4 13 12 Settlement loss 19 20 19 20 Net pension cost $ 19 $ 19 $ 20 $ 17
Other Postretirement Benefit Plans [Member]
Summary of Defined Benefit Plans Cost (Benefit) for All Funded and Unfunded Plans	The components of net postretirement benefit cost for all funded and unfunded plans are as follows: Three months ended Nine months ended in millions 2015 2014 2015 2014 Interest cost on APBO $ 1 $ 1 $ 3 $ 3 Expected return on plan assets (1 ) (1 ) (2 ) (3 ) Amortization of unrecognized prior service credit — — (1 ) — Net postretirement benefit cost — — — —

Trust Preferred Securities Is42

Trust Preferred Securities Issued by Unconsolidated Subsidiaries (Tables)	9 Months Ended
	Sep. 30, 2015
Text Block [Abstract]
Summary of Trust Preferred Securities, Common Stock and Related Debentures	The trust preferred securities, common stock, and related debentures are summarized as follows: Principal Interest Rate Maturity Trust Preferred Amount of of Trust Preferred of Trust Preferred Securities, Common Debentures, Securities and Securities and dollars in millions Net of Discount (a) Stock Net of Discount (b) Debentures (c) Debentures September 30, 2015 KeyCorp Capital I $ 156 $ 6 $ 162 1.024 % 2028 KeyCorp Capital II 111 4 115 6.875 2029 KeyCorp Capital III 145 4 149 7.750 2029 Total $ 412 $ 14 $ 426 4.968 % — December 31, 2014 $ 408 $ 14 $ 422 4.926 % — September 30, 2014 $ 397 $ 14 $ 411 4.856 % — (a) The trust preferred securities must be redeemed when the related debentures mature, or earlier if provided in the governing indenture. Each issue of trust preferred securities carries an interest rate identical to that of the related debenture. Certain trust preferred securities include basis adjustments related to fair value hedges totaling $72 million at September 30, 2015, $68 million at December 31, 2014, and $57 million at September 30, 2014. See Note 7 (“Derivatives and Hedging Activities”) for an explanation of fair value hedges. (b) We have the right to redeem these debentures. If the debentures purchased by KeyCorp Capital I are redeemed before they mature, the redemption price will be the principal amount, plus any accrued but unpaid interest. If the debentures purchased by KeyCorp Capital II or KeyCorp Capital III are redeemed before they mature, the redemption price will be the greater of: (i) the principal amount, plus any accrued but unpaid interest, or (ii) the sum of the present values of principal and interest payments discounted at the Treasury Rate (as defined in the applicable indenture), plus 20 basis points for KeyCorp Capital II or 25 basis points for KeyCorp Capital III or 50 basis points in the case of redemption upon either a tax or a capital treatment event for either KeyCorp Capital II or KeyCorp Capital III, plus any accrued but unpaid interest. The principal amount of certain debentures includes basis adjustments related to fair value hedges totaling $72 million at September 30, 2015, $68 million at December 31, 2014, and $57 million at September 30, 2014. See Note 7 for an explanation of fair value hedges. The principal amount of debentures, net of discounts, is included in “long-term debt” on the balance sheet. (c) The interest rates for the trust preferred securities issued by KeyCorp Capital II and KeyCorp Capital III are fixed. KeyCorp Capital I has a floating interest rate, equal to three-month LIBOR plus 74 basis points, that reprices quarterly. The total interest rates are weighted-average rates.

Contingent Liabilities and Gu43

Contingent Liabilities and Guarantees (Tables)	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Guarantees	The following table shows the types of guarantees that we had outstanding at September 30, 2015. Information pertaining to the basis for determining the liabilities recorded in connection with these guarantees is included in Note 1 (“Summary of Significant Accounting Policies”) under the heading “Guarantees” beginning on page 124 of our 2014 Form 10-K. Maximum Potential September 30, 2015 Undiscounted Liability in millions Future Payments Recorded Financial guarantees: Standby letters of credit $ 11,498 $ 63 Recourse agreement with FNMA 1,747 4 Return guarantee agreement with LIHTC investors 4 4 Written put options (a) 2,131 117 Total $ 15,380 $ 188 (a) The maximum potential undiscounted future payments represent notional amounts of derivatives qualifying as guarantees.

Accumulated Other Comprehensi44

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Changes in AOCI	Our changes in AOCI for the three and nine months ended September 30, 2015, and September 30, 2014, are as follows: Unrealized gains Unrealized gains Foreign currency Net pension and (losses) on securities (losses) on derivative translation postretirement in millions available for sale financial instruments adjustment benefit costs Total Balance at December 31, 2014 $ (4 ) $ (8 ) $ 22 $ (366 ) $ (356 ) Other comprehensive income before reclassification, net of income taxes 57 107 (19 ) (38 ) 107 Amounts reclassified from accumulated other comprehensive income, net of income taxes (a) 1 (44 ) 1 19 (23 ) Net current-period other comprehensive income, net of income taxes 58 63 (18 ) (19 ) 84 Balance at September 30, 2015 54 $ 55 $ 4 $ (385 ) $ (272 ) Balance at June 30, 2015 — $ 7 $ 9 $ (361 ) $ (345 ) Other comprehensive income before reclassification, net of income taxes $ 54 65 (5 ) (38 ) 76 Amounts reclassified from accumulated other comprehensive income, net of income taxes (a) — (17 ) — 14 (3 ) Net current-period other comprehensive income, net of income taxes 54 48 (5 ) (24 ) 73 Balance at September 30, 2015 54 $ 55 $ 4 $ (385 ) $ (272 ) Balance at December 31, 2013 $ (63 ) $ (11 ) $ 42 $ (320 ) $ (352 ) Other comprehensive income before reclassification, net of income taxes 24 25 (9 ) — 40 Amounts reclassified from accumulated other comprehensive income, net of income taxes (a) — (29 ) (3 ) 19 (13 ) Net current-period other comprehensive income, net of income taxes 24 (4 ) (12 ) 19 27 Balance at September 30, 2014 $ (39 ) $ (15 ) $ 30 $ (301 ) $ (325 ) Balance at June 30, 2014 $ (6 ) $ (7 ) $ 39 $ (315 ) $ (289 ) Other comprehensive income before reclassification, net of income taxes (33 ) 3 (9 ) — (39 ) Amounts reclassified from accumulated other comprehensive income, net of income (a) — (11 ) — 14 3 Net current-period other comprehensive income, net of income taxes (33 ) (8 ) (9 ) 14 (36 ) Balance at September 30, 2014 $ (39 ) $ (15 ) $ 30 $ (301 ) $ (325 ) (a) See table below for details about these reclassifications.
Reclassifications Out of AOCI	Our reclassifications out of AOCI for the three and nine months ended September 30, 2015, and September 30, 2014, are as follows: Nine months ended September 30, 2015 in millions Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on available for sale securities Realized losses $ (1 ) Other income (1 ) Income (loss) from continuing operations before income taxes — Income taxes $ (1 ) Income (loss) from continuing operations Unrealized gains (losses) on derivative financial instruments Interest rate $ 73 Interest income — Loans Interest rate (3 ) Interest expense — Long term debt 70 Income (loss) from continuing operations before income taxes 26 Income taxes $ 44 Income (loss) from continuing operations Foreign currency translation adjustment $ (2 ) Corporate services income (2 ) Income (loss) from continuing operations before income taxes (1 ) Income taxes $ (1 ) Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (13 ) Personnel expense Settlement loss (19 ) Personnel expense Amortization of unrecognized prior service cost 1 Personnel expense (31 ) Income (loss) from continuing operations before income taxes (12 ) Income taxes $ (19 ) Income (loss) from continuing operations Three months ended September 30, 2015 in millions Amount Reclassified from Income Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on derivative financial instruments Interest rate $ 28 Interest income — Loans Interest rate (1 ) Interest expense — Long term debt 27 Income (loss) from continuing operations before income taxes 10 Income taxes $ 17 Income (loss) from continuing operations Foreign currency translation adjustment $ (1 ) Corporate services income (1 ) Income (loss) from continuing operations before income taxes (1 ) Income taxes — Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (4 ) Personnel expense Settlement loss (19 ) Personnel expense (23 ) Income (loss) from continuing operations before income taxes (9 ) Income taxes $ (14 ) Income (loss) from continuing operations Nine months ended September 30, 2014 in millions Amount from Accumulated Other Comprehensive Income Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on derivative financial instruments Interest rate $ 49 Interest income — Loans Interest rate (3 ) Interest expense — Long term debt 46 Income (loss) from continuing operations before income taxes 17 Income taxes $ 29 Income (loss) from continuing operations Foreign currency translation adjustment $ 3 Corporate services income 3 Income (loss) from continuing operations before income taxes — Income taxes $ 3 Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (12 ) Personnel expense Settlement loss (20 ) Personnel expense (32 ) Income (loss) from continuing operations before income taxes (13 ) Income taxes $ (19 ) Income (loss) from continuing operations Three months ended September 30, 2014 in millions Amount Reclassified from Accumulated Other Comprehensive Income Affected Line Item in the Statement Where Net Income is Presented Unrealized gains (losses) on derivative financial instruments Interest rate $ 18 Interest income — Loans Interest rate (1 ) Interest expense — Long term debt Foreign exchange contracts 1 Other income 18 Income (loss) from continuing operations before income taxes 7 Income taxes $ 11 Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (4 ) Personnel expense Settlement loss (20 ) Personnel expense (24 ) Income (loss) from continuing operations before income taxes (10 ) Income taxes $ (14 ) Income (loss) from continuing operations

Line of Business Results (Table

Line of Business Results (Tables)	9 Months Ended
	Sep. 30, 2015
Segment Reporting [Abstract]
Financial Information of Business Groups	Accordingly, financial results may be revised periodically to reflect enhanced alignment of expense base allocation drivers, changes in the risk profile of a particular business, or changes in our organizational structure. Three months ended September 30, Key Community Bank Key Corporate Bank dollars in millions 2015 2014 2015 2014 SUMMARY OF OPERATIONS Net interest income (TE) $ 379 $ 359 $ 220 $ 215 Noninterest income 200 199 234 185 Total revenue (TE) (a) 579 558 454 400 Provision for credit losses 18 21 30 2 Depreciation and amortization expense 14 16 11 8 Other noninterest expense 434 425 235 205 Income (loss) from continuing operations before income taxes (TE) 113 96 178 185 Allocated income taxes and TE adjustments 42 36 42 51 Income (loss) from continuing operations 71 60 136 134 Income (loss) from discontinued operations, net of taxes — — — — Net income (loss) 71 60 136 134 Less: Net income (loss) attributable to noncontrolling interests — — (2 ) — Net income (loss) attributable to Key $ 71 $ 60 $ 138 $ 134 AVERAGE BALANCES (b) Loans and leases $ 31,039 $ 30,103 $ 26,425 $ 23,215 Total assets (a) 33,090 32,173 32,163 28,268 Deposits 51,234 50,303 18,809 17,599 OTHER FINANCIAL DATA Net loan charge-offs (b) $ 21 $ 28 $ 20 $ (1 ) Return on average allocated equity (b) 10.49 % 8.89 % 28.65 % 31.59 % Return on average allocated equity 10.49 8.89 28.65 31.59 Average full-time equivalent employees (c) 7,326 7,573 2,173 1,998 Nine months ended September 30, Key Community Bank Key Corporate Bank dollars in millions 2015 2014 2015 2014 SUMMARY OF OPERATIONS Net interest income (TE) $ 1,098 $ 1,084 $ 661 $ 621 Noninterest income 589 574 671 566 Total revenue (TE) (a) 1,687 1,658 1,332 1,187 Provision for credit losses 50 48 77 7 Depreciation and amortization expense 42 49 31 22 Other noninterest expense 1,297 1,274 681 599 Income (loss) from continuing operations before income taxes (TE) 298 287 543 559 Allocated income taxes and TE adjustments 111 107 143 158 Income (loss) from continuing operations 187 180 400 401 Income (loss) from discontinued operations, net of taxes — — — — Net income (loss) 187 180 400 401 Less: Net income (loss) attributable to noncontrolling interests — — (1 ) 2 Net income (loss) attributable to Key $ 187 $ 180 $ 401 $ 399 AVERAGE BALANCES (b) Loans and leases $ 30,804 $ 29,979 $ 25,488 $ 22,702 Total assets (a) 32,853 32,063 31,236 27,829 Deposits 50,808 50,151 19,029 16,655 OTHER FINANCIAL DATA Net loan charge-offs (b) $ 69 $ 89 $ 28 $ (15 ) Return on average allocated equity (b) 9.27 % 8.81 % 28.82 % 33.74 % Return on average allocated equity 9.27 8.81 28.82 33.74 Average full-time equivalent employees (c) 7,392 7,613 2,096 1,952 (a) Substantially all revenue generated by our major business segments is derived from clients that reside in the United States. Substantially all long-lived assets, including premises and equipment, capitalized software, and goodwill held by our major business segments, are located in the United States. (b) From continuing operations. (c) The number of average full-time equivalent employees was not adjusted for discontinued operations. Other Segments Total Segments Reconciling Items Key 2015 2014 2015 2014 2015 2014 2015 2014 $ (4 ) $ 6 $ 595 $ 580 $ 3 $ 1 $ 598 $ 581 39 38 473 422 (3 ) (5 ) 470 417 35 44 1,068 1,002 — (4 ) 1,068 998 (4 ) (4 ) 44 19 1 — 45 19 2 3 27 27 35 38 62 65 13 17 682 647 (20 ) (6 ) 662 641 24 28 315 309 (16 ) (36 ) 299 273 (2 ) 1 82 88 (3 ) (18 ) 79 70 26 27 233 221 (13 ) (18 ) 220 203 — — — — (3 ) (17 ) (3 ) (17 ) 26 27 233 221 (16 ) (35 ) 217 186 — — (2 ) — — — (2 ) — $ 26 $ 27 $ 235 $ 221 $ (16 ) $ (35 ) $ 219 $ 186 $ 1,780 $ 2,396 $ 59,244 $ 55,714 $ 37 $ 82 $ 59,281 $ 55,796 26,871 26,017 92,124 86,458 527 665 92,651 87,123 455 564 70,498 68,466 (29 ) (130 ) 70,469 68,336 $ 1 $ 4 $ 42 $ 31 $ (1 ) — $ 41 $ 31 33.27 % 24.63 % 19.00 % 18.28 % (.90 )% (1.26 )% 8.30 % 7.69 % 33.27 24.63 19.00 18.28 (1.11 ) (2.45 ) 8.19 7.05 14 34 9,513 9,605 4,042 4,300 13,555 13,905 Other Segments Total Segments Reconciling Items Key 2015 2014 2015 2014 2015 2014 2015 2014 — $ 21 $ 1,759 $ 1,726 $ 7 $ 3 $ 1,766 $ 1,729 $ 146 174 1,406 1,314 (11 ) (7 ) 1,395 1,307 146 195 3,165 3,040 (4 ) (4 ) 3,161 3,036 (7 ) (19 ) 120 36 1 (1 ) 121 35 6 9 79 80 112 115 191 195 38 54 2,016 1,927 (103 ) (65 ) 1,913 1,862 109 151 950 997 (14 ) (53 ) 936 944 7 27 261 292 (11 ) (42 ) 250 250 102 124 689 705 (3 ) (11 ) 686 694 — — — — 5 (41 ) 5 (41 ) 102 124 689 705 2 (52 ) 691 653 2 4 1 6 — — 1 6 $ 100 $ 120 $ 688 $ 699 $ 2 $ (52 ) $ 690 $ 647 $ 1,908 $ 2,639 $ 58,200 $ 55,320 $ 63 $ 68 $ 58,263 $ 55,388 26,617 25,944 90,706 85,836 618 676 91,324 86,512 454 591 70,291 67,397 (62 ) (138 ) 70,229 67,259 $ 8 $ 8 $ 105 $ 82 — $ (1 ) $ 105 $ 81 40.39 % 36.38 % 18.81 % 19.66 % (.05 )% (.26 )% 6.48 % 6.59 % 40.39 36.38 18.81 19.66 .07 (1.22 ) 6.52 6.20 15 50 9,503 9,615 4,022 4,327 13,525 13,942

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015
Equity Method Investments [Member]
Accounting Policies [Line Items]
Economic interest in unconsolidated investments in voting rights entities, minimum	20.00%
Economic interest in unconsolidated investments in voting rights entities, maximum	50.00%
Cost Method Investments [Member]
Accounting Policies [Line Items]
Economic interest in unconsolidated investments in voting rights entities, Ownership less than	20.00%

Earnings Per Common Share - Bas

Earnings Per Common Share - Basic and Diluted Earnings Per Common Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
EARNINGS
Income (loss) from continuing operations		$ 220	$ 203	$ 686	$ 694
Less: Net income (loss) attributable to noncontrolling interests		(2)		1	6
Income (loss) from continuing operations attributable to Key		222	203	685	688
Income (loss) from continuing operations attributable to Key common shareholders		216	197	668	671
Income (loss) from discontinued operations, net of taxes		(3)	(17)	5	(41)
Net income (loss) attributable to Key common shareholders		$ 213	$ 180	$ 673	$ 630
WEIGHTED-AVERAGE COMMON SHARES
Weighted-average common shares outstanding		831,430	867,350	839,758	875,728
Effect of convertible preferred stock		0	0	0	0
Effect of common share options and other stock awards		7,450	6,772	7,613	6,723
Weighted-average common shares and potential common shares outstanding	[1]	838,880	874,122	847,371	882,451
EARNINGS PER COMMON SHARE
Income (loss) from continuing operations attributable to Key common shareholders		$ 0.26	$ 0.23	$ 0.79	$ 0.77
Income (loss) from discontinued operations, net of taxes			(0.02)	0.01	(0.05)
Net income (loss) attributable to Key common shareholders	[2]	0.26	0.21	0.80	0.72
Income (loss) from continuing operations attributable to Key common shareholders - assuming dilution		0.26	0.23	0.78	0.76
Income (loss) from discontinued operations, net of taxes			(0.02)	0.01	(0.05)
Net income (loss) attributable to Key common shareholders - assuming dilution	[2]	$ 0.25	$ 0.21	$ 0.79	$ 0.71
Series A Preferred Stock [Member]
EARNINGS
Less: Dividends on Series A Preferred Stock		$ 6	$ 6	$ 17	$ 17
[1]	Assumes conversion of common share options and other stock awards and/or convertible preferred stock, as applicable.
[2]	EPS may not foot due to rounding.

Loans and Loans Held for Sale -

Loans and Loans Held for Sale - Loans by Category (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, financial and agricultural	$ 31,095	$ 27,982	$ 26,683
Commercial real estate:
Commercial mortgage	8,180	8,047	8,276
Construction	1,070	1,100	1,036
Total commercial real estate loans	9,250	9,147	9,312
Commercial lease financing	3,929	4,252	4,135
Total commercial loans	44,274	41,381	40,130
Residential - prime loans:
Real estate - residential mortgage	2,267	2,225	2,213
Home equity loans	10,504	10,633	10,663
Total residential - prime loans	12,771	12,858	12,876
Credit cards	770	754	724
Consumer other	658	828	879
Total consumer loans	15,811	16,000	16,025
Loans Outstanding	60,085	57,381	56,155
Key Community Bank [Member]
Residential - prime loans:
Home equity loans	10,282	10,366	10,380
Consumer other	1,612	1,560	1,546
Other loans [Member]
Residential - prime loans:
Home equity loans	222	267	283
Consumer other	38	49	51
Marine loans [Member]
Residential - prime loans:
Consumer other	$ 620	$ 779	$ 828

Loans and Loans Held for Sale49

Loans and Loans Held for Sale - Loans by Category (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, financial and agricultural	$ 31,095	$ 26,683	$ 27,982
Commercial lease financing includes receivables held as collateral for secured borrowing	162	367	302
Purchased loans	119	143	138
Education Lending [Member] | Discontinued Operations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	1,900	2,400	2,300
Commercial Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, financial and agricultural	88	90	88
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased loans	$ 12	$ 14	$ 13

Loans and Loans Held for Sale50

Loans and Loans Held for Sale - Loans Held for Sale (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, financial and agricultural	$ 74		$ 63	$ 30
Commercial lease financing	10		15	10
Total loans held for sale	916	$ 835	734	784	$ 435
Commercial Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real estate - mortgage	806		638	725
Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real estate - mortgage	$ 26		$ 18	$ 19

Loans and Loans Held for Sale51

Loans and Loans Held for Sale - Loans Held for Sale (Parenthetical) (Detail) $ in Millions	Sep. 30, 2015USD ($)
Loans Receivables [Abstract]
Loan securitization trust VIEs	$ 169

Loans and Loans Held for Sale52

Loans and Loans Held for Sale - Summary of Changes in Loans Held for Sale (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Loans Receivables [Abstract]
Balance at beginning of the period	$ 835	$ 784	$ 435
New originations	1,673	2,465	1,593
Transfers from (to) held to maturity, net	24	2
Loan sales	(1,616)	(2,516)	(1,243)
Loan draws (payments), net		(1)	(1)
Balance at end of period	$ 916	$ 734	$ 784

Loans and Loans Held for Sale53

Loans and Loans Held for Sale - Summary of Changes in Loans Held for Sale (Parenthetical) (Detail) $ in Millions	Sep. 30, 2015USD ($)
Loans Receivables [Abstract]
Loan securitization trust VIEs	$ 169

Asset Quality - Nonperforming A

Asset Quality - Nonperforming Assets and Past Due Loans (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Receivables [Abstract]
Total nonperforming loans	$ 400	$ 418	$ 401
Nonperforming loans held for sale	0	0	0
OREO	17	18	16
Other nonperforming assets			1
Total nonperforming assets	417	436	418
Nonperforming assets from discontinued operations-education lending	8	11	9
Restructured loans included in nonperforming loans	159	157	137
Restructured loans with an allocated specific allowance	71	82	115
Specifically allocated allowance for restructured loans	29	34	30
Accruing loans past due 90 days or more	54	96	71
Accruing loans past due 30 through 89 days	$ 271	$ 235	$ 340

Asset Quality - Nonperforming55

Asset Quality - Nonperforming Assets and Past Due Loans (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Purchased credit impaired loans	$ 12	$ 13	$ 14
Restructured loans	20	$ 17	$ 16
Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Carrying value of foreclosed residential real estate	114
Foreclosed Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Carrying value of foreclosed residential real estate	$ 13

Asset Quality - Additional Info

Asset Quality - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015USD ($)SecurityLoan	Sep. 30, 2014USD ($)SecurityLoan	Sep. 30, 2015USD ($)SecurityLoan	Sep. 30, 2014USD ($)SecurityLoan	Dec. 31, 2014USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Dec. 31, 2013USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Estimated gross contractual amount receivable of PCI loans	$ 41,000,000		$ 41,000,000
Estimated cash flows nonaccretable amount			11,000,000
Estimated cash flows accretable amount	5,000,000		5,000,000
Purchased Credit Impaired, Outstanding	12,000,000	$ 14,000,000	12,000,000	$ 14,000,000	$ 13,000,000
Accretable yield	$ 5,000,000		$ 5,000,000
Percentage of carrying amount of our commercial nonperforming loans outstanding	74.00%		74.00%
Percentage of nonperforming loans outstanding face value	79.00%		79.00%
Percentage of loans held for sale and other nonperforming assets	79.00%		79.00%
Aggregate carrying amount of largest nonperforming loans	$ 112,000,000	$ 72,000,000	$ 112,000,000	$ 72,000,000
Number of largest nonperforming loans | SecurityLoan	20	20	20	20
Percentage of total loans on nonperforming status	28.00%	18.00%	28.00%	18.00%
Net reduction to interest income			$ 12,000,000		16,000,000
Interest income recognized on outstanding balances			5,000,000	$ 5,000,000
Total restructured loans	$ 287,000,000	$ 264,000,000	287,000,000	264,000,000	270,000,000
Addition in restructured loans			87,000,000
Restructured loans partially in payments and charge-offs			70,000,000
Loans net of deferred income	60,085,000,000	56,155,000,000	60,085,000,000	56,155,000,000	57,381,000,000
Minimum outstanding impaired commercial loans	2,500,000		$ 2,500,000
Number of days to designate commercial loans will be charged off in full or charged down to the fair value of the underlying collateral payment due period			180 days
Number of days to designate the charge-off policy for consumer loans taking effect, payment due period			120 days
Number of days to designate home equity and residential mortgage loans to get charged down to net realizable value payment due period			180 days
Number of days to designate the charge-off policy for credit card loans taking effect, payment due period			180 days
ALLL	790,000,000	804,000,000	$ 790,000,000	$ 804,000,000	794,000,000
ALLL percentage			1.31%	1.43%
ALLL of nonperforming loans percentage			197.50%	200.50%
Provision (credit) for loan and lease losses			$ 110,000,000	$ 52,000,000
Liability for credit losses on lending-related commitments	$ 54,000,000	$ 35,000,000	$ 54,000,000	$ 35,000,000	35,000,000	$ 45,000,000	$ 37,000,000	$ 37,000,000
Percentage of total allowance for credit losses	1.40%	1.49%	1.40%	1.49%
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Changes in the accretable yield, accretion			$ 1,000,000
Changes in the accretable yield, net reclassifications			$ 1,000,000
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nature of default in repayment of loan TDRs			90 days past due
Number of loans | SecurityLoan	0	0
Loans net of deferred income	$ 44,274,000,000	$ 40,130,000,000	$ 44,274,000,000	$ 40,130,000,000	41,381,000,000
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nature of default in repayment of loan TDRs			More than 60 days past due
Number of loans | SecurityLoan	61	93
Financial receivable, modifications, subsequent default, recorded investment	$ 3,000,000	$ 4,000,000
Loans net of deferred income	15,811,000,000	16,025,000,000	$ 15,811,000,000	16,025,000,000	16,000,000,000
Continuing Operations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Outstanding	12,000,000	14,000,000	12,000,000	14,000,000	13,000,000
Loans net of deferred income	60,085,000,000	56,155,000,000	60,085,000,000	56,155,000,000	57,381,000,000
Increase (decrease) in allowance for loan losses			$ (14,000,000)
Percentage decrease in allowance for loan losses			1.70%
Individually evaluated for impairment, outstanding	318,000,000	299,000,000	$ 318,000,000	299,000,000	302,000,000
Individually evaluated for Impairment, corresponding allowance	36,000,000	38,000,000	36,000,000	38,000,000	40,000,000
Collectively Evaluated for Impairment, Outstanding	59,755,000,000	55,842,000,000	59,755,000,000	55,842,000,000	57,066,000,000
Collectively evaluated for current, corresponding allowance	753,000,000	765,000,000	753,000,000	765,000,000	753,000,000
Provision (credit) for loan and lease losses			101,000,000	37,000,000
Continuing Operations [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Outstanding	0	1,000,000	0	1,000,000	1,000,000
Loans net of deferred income	44,274,000,000	40,130,000,000	44,274,000,000	40,130,000,000	41,381,000,000
Individually evaluated for impairment, outstanding	92,000,000	70,000,000	92,000,000	70,000,000	72,000,000
Individually evaluated for Impairment, corresponding allowance	10,000,000	9,000,000	10,000,000	9,000,000	12,000,000
Collectively Evaluated for Impairment, Outstanding	44,182,000,000	40,059,000,000	44,182,000,000	40,059,000,000	41,308,000,000
Collectively evaluated for current, corresponding allowance	637,000,000	619,000,000	637,000,000	619,000,000	611,000,000
Provision (credit) for loan and lease losses			68,000,000
Continuing Operations [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Outstanding	12,000,000	13,000,000	12,000,000	13,000,000	12,000,000
Loans net of deferred income	15,811,000,000	16,025,000,000	15,811,000,000	16,025,000,000	16,000,000,000
Individually evaluated for impairment, outstanding	226,000,000	229,000,000	226,000,000	229,000,000	230,000,000
Individually evaluated for Impairment, corresponding allowance	26,000,000	29,000,000	26,000,000	29,000,000	28,000,000
Collectively Evaluated for Impairment, Outstanding	15,573,000,000	15,783,000,000	15,573,000,000	15,783,000,000	15,758,000,000
Collectively evaluated for current, corresponding allowance	116,000,000	146,000,000	116,000,000	146,000,000	142,000,000
Provision (credit) for loan and lease losses			33,000,000	37,000,000
Continuing Operations [Member] | Purchase Credit Impaired Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated for Impairment, corresponding allowance	1,000,000	1,000,000	1,000,000	1,000,000
Collectively Evaluated for Impairment, Outstanding	12,000,000	14,000,000	12,000,000	14,000,000
Provision (credit) for loan and lease losses			0	0
Performing [Member] | Loans, Total [Member] | Credit Concentration Risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans net of deferred income	59,300,000,000	55,300,000,000	$ 59,300,000,000	$ 55,300,000,000	$ 56,600,000,000
Concentration risk			98.80%	98.50%	98.70%
Nonperforming [Member] | Loans, Total [Member] | Credit Concentration Risk [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans net of deferred income	724,000,000	$ 813,000,000	$ 724,000,000	$ 813,000,000	$ 749,000,000
Concentration risk			1.20%	1.50%	1.30%
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Purchased Credit Impaired, Outstanding	18,000,000		$ 18,000,000
Purchased credit impaired loans carrying value	$ 12,000,000		$ 12,000,000

Asset Quality - Breakdown of In

Asset Quality - Breakdown of Individually Impaired Loans (Detail) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	$ 127	$ 146	$ 115
Recorded Investment	318	298	302
With no related allowance recorded, Unpaid Principal Balance	154	171	133
Unpaid Principal Balance	359	324	320
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	119	141	131
With related allowance recorded, Recorded Investment	191	152	187
With related allowance recorded, Unpaid Principal Balance	205	153	187
Specific Allowance	36	38	40
With related allowance recorded, Average Recorded Investment	207	146	169
Average Recorded Investment	326	287	300
Commercial, Financial and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	30	11	6
With no related allowance recorded, Unpaid Principal Balance	54	20	17
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	19	12	8
With related allowance recorded, Recorded Investment	43	20	37
With related allowance recorded, Unpaid Principal Balance	56	21	37
Specific Allowance	9	7	9
With related allowance recorded, Average Recorded Investment	58	12	28
Commercial Real Estate: Commercial Mortgage [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	9	22	15
With no related allowance recorded, Unpaid Principal Balance	12	27	20
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	10	23	19
With related allowance recorded, Recorded Investment	5	7	6
With related allowance recorded, Unpaid Principal Balance	6	7	6
Specific Allowance	1	2	2
With related allowance recorded, Average Recorded Investment	6	5	6
Commercial Real Estate: Construction [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	5	9	5
With no related allowance recorded, Unpaid Principal Balance	5	20	6
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	6	7	7
With related allowance recorded, Recorded Investment			3
With related allowance recorded, Unpaid Principal Balance			3
Specific Allowance			1
With related allowance recorded, Average Recorded Investment			2
Commercial Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	14	31	20
With no related allowance recorded, Unpaid Principal Balance	17	47	26
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	16	30	26
With related allowance recorded, Recorded Investment	5	7	9
With related allowance recorded, Unpaid Principal Balance	6	7	9
Specific Allowance	1	2	3
With related allowance recorded, Average Recorded Investment	6	5	8
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	44	42	26
With no related allowance recorded, Unpaid Principal Balance	71	67	43
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	35	42	34
With related allowance recorded, Recorded Investment	48	27	46
With related allowance recorded, Unpaid Principal Balance	62	28	46
Specific Allowance	10	9	12
With related allowance recorded, Average Recorded Investment	64	17	36
Real Estate - Residential Mortgage [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	22	36	24
With no related allowance recorded, Unpaid Principal Balance	22	36	24
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	22	30	30
With related allowance recorded, Recorded Investment	33	19	31
With related allowance recorded, Unpaid Principal Balance	33	19	31
Specific Allowance	5	4	5
With related allowance recorded, Average Recorded Investment	33	24	25
Home Equity: Key Community Bank [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	58	64	62
With no related allowance recorded, Unpaid Principal Balance	58	64	63
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	59	65	63
With related allowance recorded, Recorded Investment	54	41	46
With related allowance recorded, Unpaid Principal Balance	54	41	46
Specific Allowance	17	16	16
With related allowance recorded, Average Recorded Investment	53	39	43
Home Equity: Other [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	2	2	1
With no related allowance recorded, Unpaid Principal Balance	2	2	1
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	2	2	2
With related allowance recorded, Recorded Investment	10	11	11
With related allowance recorded, Unpaid Principal Balance	10	11	11
Specific Allowance	1	2	2
With related allowance recorded, Average Recorded Investment	10	11	11
Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	60	66	63
With no related allowance recorded, Unpaid Principal Balance	60	66	64
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	61	67	65
With related allowance recorded, Recorded Investment	64	52	57
With related allowance recorded, Unpaid Principal Balance	64	52	57
Specific Allowance	18	18	18
With related allowance recorded, Average Recorded Investment	63	50	54
Consumer Marine [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	1	2	2
With no related allowance recorded, Unpaid Principal Balance	1	2	2
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	1	2	2
With related allowance recorded, Recorded Investment	38	46	43
With related allowance recorded, Unpaid Principal Balance	38	46	43
Specific Allowance	2	5	5
With related allowance recorded, Average Recorded Investment	39	47	45
Consumer Other [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	1	2	2
With no related allowance recorded, Unpaid Principal Balance	1	2	2
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	1	2	2
With related allowance recorded, Recorded Investment	40	48	45
With related allowance recorded, Unpaid Principal Balance	40	48	45
Specific Allowance	2	6	5
With related allowance recorded, Average Recorded Investment	41	49	47
Consumer Loans [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	83	104	89
With no related allowance recorded, Unpaid Principal Balance	83	104	90
With no related allowance recorded, Specific Allowance	0
With no related allowance recorded, Average Recorded Investment	84	99	97
With related allowance recorded, Recorded Investment	143	125	141
With related allowance recorded, Unpaid Principal Balance	143	125	141
Specific Allowance	26	29	28
With related allowance recorded, Average Recorded Investment	143	129	133
Consumer Other - Key Community Bank [Member]
Financing Receivable, Impaired [Line Items]
With related allowance recorded, Recorded Investment	3	3	4
With related allowance recorded, Unpaid Principal Balance	3	3	4
Specific Allowance	0
With related allowance recorded, Average Recorded Investment	3	3	3
Consumer Credit Card [Member]
Financing Receivable, Impaired [Line Items]
With related allowance recorded, Recorded Investment	3	3	4
With related allowance recorded, Unpaid Principal Balance	3	3	4
Specific Allowance	1	1
With related allowance recorded, Average Recorded Investment	3	3	4
Other Consumer [Member]
Financing Receivable, Impaired [Line Items]
With related allowance recorded, Recorded Investment	2	2	2
With related allowance recorded, Unpaid Principal Balance	2	2	2
Specific Allowance	0	1
With related allowance recorded, Average Recorded Investment	$ 2	$ 2	$ 2

Asset Quality - Breakdown of No

Asset Quality - Breakdown of Nonperforming TDRs by Loans Category (Detail) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015USD ($)SecurityLoan	Sep. 30, 2014USD ($)SecurityLoan	Dec. 31, 2014USD ($)SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	4,659	4,730	4,776
Pre-modification Outstanding Recorded Investment	$ 366	$ 364	$ 349
Post-modification Outstanding Recorded Investment	$ 287	$ 264	$ 270
Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	2,042	2,195	2,391
Pre-modification Outstanding Recorded Investment	$ 198	$ 191	$ 200
Post-modification Outstanding Recorded Investment	$ 159	$ 137	$ 157
Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	2,617	2,535	2,385
Pre-modification Outstanding Recorded Investment	$ 168	$ 173	$ 149
Post-modification Outstanding Recorded Investment	$ 128	$ 127	$ 113
Commercial, Financial and Agricultural [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	12	20	14
Pre-modification Outstanding Recorded Investment	$ 56	$ 16	$ 25
Post-modification Outstanding Recorded Investment	$ 50	$ 9	$ 23
Commercial, Financial and Agricultural [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	12	25	20
Pre-modification Outstanding Recorded Investment	$ 6	$ 6	$ 6
Post-modification Outstanding Recorded Investment	$ 3	$ 3	$ 3
Commercial Real Estate: Commercial Mortgage [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	11	12	10
Pre-modification Outstanding Recorded Investment	$ 30	$ 39	$ 38
Post-modification Outstanding Recorded Investment	$ 7	$ 14	$ 13
Commercial Real Estate: Commercial Mortgage [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1	4	1
Pre-modification Outstanding Recorded Investment	$ 2	$ 18	$ 2
Post-modification Outstanding Recorded Investment	$ 1	$ 8	$ 1
Commercial Real Estate: Construction [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan		3	1
Pre-modification Outstanding Recorded Investment		$ 15	$ 5
Post-modification Outstanding Recorded Investment		$ 1
Commercial Real Estate Loans [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	11	15	11
Pre-modification Outstanding Recorded Investment	$ 30	$ 54	$ 43
Post-modification Outstanding Recorded Investment	$ 7	$ 15	$ 13
Commercial Real Estate Loans [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1	4	1
Pre-modification Outstanding Recorded Investment	$ 2	$ 18	$ 2
Post-modification Outstanding Recorded Investment	$ 1	$ 8	$ 1
Commercial Loans [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	23	35	25
Pre-modification Outstanding Recorded Investment	$ 86	$ 70	$ 68
Post-modification Outstanding Recorded Investment	$ 57	$ 24	$ 36
Commercial Loans [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	13	29	21
Pre-modification Outstanding Recorded Investment	$ 8	$ 24	$ 8
Post-modification Outstanding Recorded Investment	$ 4	$ 11	$ 4
Real Estate - Residential Mortgage [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	356	464	453
Pre-modification Outstanding Recorded Investment	$ 21	$ 28	$ 27
Post-modification Outstanding Recorded Investment	$ 21	$ 28	$ 27
Real Estate - Residential Mortgage [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	499	359	381
Pre-modification Outstanding Recorded Investment	$ 36	$ 28	$ 29
Post-modification Outstanding Recorded Investment	$ 36	$ 28	$ 29
Home Equity: Key Community Bank [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1,093	1,125	1,184
Pre-modification Outstanding Recorded Investment	$ 79	$ 70	$ 79
Post-modification Outstanding Recorded Investment	$ 70	$ 64	$ 72
Home Equity: Key Community Bank [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	794	731	674
Pre-modification Outstanding Recorded Investment	$ 49	$ 45	$ 41
Post-modification Outstanding Recorded Investment	$ 42	$ 40	$ 36
Home Equity: Other [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	122	133	158
Pre-modification Outstanding Recorded Investment	$ 3	$ 4	$ 4
Post-modification Outstanding Recorded Investment	$ 3	$ 4	$ 4
Home Equity: Other [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	327	325	310
Pre-modification Outstanding Recorded Investment	$ 10	$ 10	$ 9
Post-modification Outstanding Recorded Investment	$ 8	$ 8	$ 8
Home Equity Loans [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1,215	1,258	1,342
Pre-modification Outstanding Recorded Investment	$ 82	$ 74	$ 83
Post-modification Outstanding Recorded Investment	$ 73	$ 68	$ 76
Home Equity Loans [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1,121	1,056	984
Pre-modification Outstanding Recorded Investment	$ 59	$ 55	$ 50
Post-modification Outstanding Recorded Investment	$ 50	$ 48	$ 44
Consumer Other - Key Community Bank [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	26	31	37
Pre-modification Outstanding Recorded Investment	$ 1	$ 1	$ 2
Post-modification Outstanding Recorded Investment	$ 1	$ 1	$ 1
Consumer Other - Key Community Bank [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	45	53	45
Pre-modification Outstanding Recorded Investment	$ 2	$ 2	$ 2
Post-modification Outstanding Recorded Investment	$ 1	$ 2	$ 2
Consumer Credit Card Financing Receivable [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	314	156	290
Pre-modification Outstanding Recorded Investment	$ 2	$ 1	$ 2
Post-modification Outstanding Recorded Investment	$ 2	$ 1	$ 2
Consumer Credit Card Financing Receivable [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	473	564	514
Pre-modification Outstanding Recorded Investment	$ 2	$ 4	$ 4
Post-modification Outstanding Recorded Investment	$ 2	$ 3	$ 2
Consumer Marine [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	92	211	206
Pre-modification Outstanding Recorded Investment	$ 6	$ 16	$ 17
Post-modification Outstanding Recorded Investment	$ 5	$ 14	$ 14
Consumer Marine [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	398	402	373
Pre-modification Outstanding Recorded Investment	$ 59	$ 58	$ 54
Post-modification Outstanding Recorded Investment	$ 33	$ 34	$ 31
Other Consumer [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	16	40	38
Pre-modification Outstanding Recorded Investment		$ 1	$ 1
Post-modification Outstanding Recorded Investment		$ 1	$ 1
Other Consumer [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	68	72	67
Pre-modification Outstanding Recorded Investment	$ 2	$ 2	$ 2
Post-modification Outstanding Recorded Investment	$ 2	$ 1	$ 1
Consumer Other [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	108	251	244
Pre-modification Outstanding Recorded Investment	$ 6	$ 17	$ 18
Post-modification Outstanding Recorded Investment	$ 5	$ 15	$ 15
Consumer Other [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	466	474	440
Pre-modification Outstanding Recorded Investment	$ 61	$ 60	$ 56
Post-modification Outstanding Recorded Investment	$ 35	$ 35	$ 32
Consumer Loans [Member] | Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	2,019	2,160	2,366
Pre-modification Outstanding Recorded Investment	$ 112	$ 121	$ 132
Post-modification Outstanding Recorded Investment	$ 102	$ 113	$ 121
Consumer Loans [Member] | Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	2,604	2,506	2,364
Pre-modification Outstanding Recorded Investment	$ 160	$ 149	$ 141
Post-modification Outstanding Recorded Investment	$ 124	$ 116	$ 109

Asset Quality - Post-Modificati

Asset Quality - Post-Modification Outstanding Recorded Investment by Concession Type for Our Commercial Accruing and Nonaccruing TDRs (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Modifications [Line Items]
Total commercial and consumer TDRs	$ 287	$ 270	$ 264
Total Loans	60,085	57,381	56,155
Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Interest rate reduction	58	13	24
Forgiveness of principal	2	2	5
Other	1	25	6
Total	61	40	35
Total Loans	44,274	41,381	40,130
Consumer Loans [Member]
Financing Receivable, Modifications [Line Items]
Interest rate reduction	139	140	140
Forgiveness of principal	4	4	4
Other	83	86	85
Total	226	230	229
Total Loans	$ 15,811	$ 16,000	$ 16,025

Asset Quality - Post-Modifica60

Asset Quality - Post-Modification Outstanding Recorded Investment by Concession Type for Our Commercial Accruing and Nonaccruing TDRs (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Receivables [Abstract]
Additional funds to borrowers related to lending related commitments	$ 8	$ 5	$ 1

Asset Quality - Past Due Loans

Asset Quality - Past Due Loans Including Current Loans (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 59,349	$ 56,619	$ 55,328
30-59 Days Past Due	194	147	235
60-89 Days Past Due	77	88	106
90 and Greater Days Past Due	53	96	71
Nonperforming Loans	400	418	401
Total Past Due and Nonperforming Loans	724	749	813
Purchased Credit Impaired	12	13	14
Loans Outstanding	60,085	57,381	56,155
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	30,901	27,858	26,534
30-59 Days Past Due	58	19	50
60-89 Days Past Due	30	14	34
90 and Greater Days Past Due	17	32	18
Nonperforming Loans	89	59	47
Total Past Due and Nonperforming Loans	194	124	149
Loans Outstanding	31,095	27,982	26,683
Commercial Real Estate: Commercial Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	8,127	7,981	8,201
30-59 Days Past Due	18	6	17
60-89 Days Past Due	7	10	7
90 and Greater Days Past Due	5	16	9
Nonperforming Loans	23	34	41
Total Past Due and Nonperforming Loans	53	66	74
Purchased Credit Impaired			1
Loans Outstanding	8,180	8,047	8,276
Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,060	1,084	1,017
30-59 Days Past Due	1	2	3
60-89 Days Past Due			2
90 and Greater Days Past Due		1
Nonperforming Loans	9	13	14
Total Past Due and Nonperforming Loans	10	16	19
Loans Outstanding	1,070	1,100	1,036
Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	9,187	9,065	9,218
30-59 Days Past Due	19	8	20
60-89 Days Past Due	7	10	9
90 and Greater Days Past Due	5	17	9
Nonperforming Loans	32	47	55
Total Past Due and Nonperforming Loans	63	82	93
Purchased Credit Impaired			1
Loans Outstanding	9,250	9,147	9,312
Commercial Lease Financing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,875	4,172	4,017
30-59 Days Past Due	29	30	74
60-89 Days Past Due	3	21	24
90 and Greater Days Past Due	1	11	6
Nonperforming Loans	21	18	14
Total Past Due and Nonperforming Loans	54	80	118
Loans Outstanding	3,929	4,252	4,135
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	43,963	41,095	39,769
30-59 Days Past Due	106	57	144
60-89 Days Past Due	40	45	67
90 and Greater Days Past Due	23	60	33
Nonperforming Loans	142	124	116
Total Past Due and Nonperforming Loans	311	286	360
Purchased Credit Impaired			1
Loans Outstanding	44,274	41,381	40,130
Real Estate - Residential Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,171	2,111	2,091
30-59 Days Past Due	11	12	17
60-89 Days Past Due	4	7	7
90 and Greater Days Past Due	3	4	5
Nonperforming Loans	67	79	81
Total Past Due and Nonperforming Loans	85	102	110
Purchased Credit Impaired	11	12	12
Loans Outstanding	2,267	2,225	2,213
Home Equity: Key Community Bank [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,027	10,098	10,124
30-59 Days Past Due	49	46	46
60-89 Days Past Due	20	22	19
90 and Greater Days Past Due	11	14	16
Nonperforming Loans	174	185	174
Total Past Due and Nonperforming Loans	254	267	255
Purchased Credit Impaired	1	1	1
Loans Outstanding	10,282	10,366	10,380
Home Equity: Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	208	249	266
30-59 Days Past Due	4	5	4
60-89 Days Past Due	2	2	2
90 and Greater Days Past Due	1	1	1
Nonperforming Loans	7	10	10
Total Past Due and Nonperforming Loans	14	18	17
Loans Outstanding	222	267	283
Home Equity Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,235	10,347	10,390
30-59 Days Past Due	53	51	50
60-89 Days Past Due	22	24	21
90 and Greater Days Past Due	12	15	17
Nonperforming Loans	181	195	184
Total Past Due and Nonperforming Loans	268	285	272
Purchased Credit Impaired	1	1	1
Loans Outstanding	10,504	10,633	10,663
Consumer Other - Key Community Bank [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,595	1,541	1,528
30-59 Days Past Due	7	9	7
60-89 Days Past Due	4	3	3
90 and Greater Days Past Due	5	5	6
Nonperforming Loans	1	2	2
Total Past Due and Nonperforming Loans	17	19	18
Loans Outstanding	1,612	1,560	1,546
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	750	733	705
30-59 Days Past Due	6	6	5
60-89 Days Past Due	4	4	4
90 and Greater Days Past Due	8	9	9
Nonperforming Loans	2	2	1
Total Past Due and Nonperforming Loans	20	21	19
Loans Outstanding	770	754	724
Consumer Marine [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	601	746	796
30-59 Days Past Due	10	11	11
60-89 Days Past Due	2	5	4
90 and Greater Days Past Due	1	2	1
Nonperforming Loans	6	15	16
Total Past Due and Nonperforming Loans	19	33	32
Loans Outstanding	620	779	828
Consumer Others [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	34	46	49
30-59 Days Past Due	1	1	1
60-89 Days Past Due	1
90 and Greater Days Past Due	1	1
Nonperforming Loans	1	1	1
Total Past Due and Nonperforming Loans	4	3	2
Loans Outstanding	38	49	51
Consumer Other [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	635	792	845
30-59 Days Past Due	11	12	12
60-89 Days Past Due	3	5	4
90 and Greater Days Past Due	2	3	1
Nonperforming Loans	7	16	17
Total Past Due and Nonperforming Loans	23	36	34
Loans Outstanding	658	828	879
Consumer Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15,386	15,524	15,559
30-59 Days Past Due	88	90	91
60-89 Days Past Due	37	43	39
90 and Greater Days Past Due	30	36	38
Nonperforming Loans	258	294	285
Total Past Due and Nonperforming Loans	413	463	453
Purchased Credit Impaired	12	13	13
Loans Outstanding	$ 15,811	$ 16,000	$ 16,025

Asset Quality - Financing Recei

Asset Quality - Financing Receivable Credit Quality Indicators (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 60,085	$ 57,381	$ 56,155
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	31,095	$ 27,982	26,683
Commercial, Financial and Agricultural [Member] | AAA-AA [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	384		342
Commercial, Financial and Agricultural [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,439		1,147
Commercial, Financial and Agricultural [Member] | BBB-BB [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	27,438		23,822
Commercial, Financial and Agricultural [Member] | B [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	639		594
Commercial, Financial and Agricultural [Member] | CCC-C [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,195		778
RE Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	8,180		8,276
RE Commercial [Member] | AAA-AA [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3		2
RE Commercial [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	4		2
RE Commercial [Member] | BBB-BB [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	7,690		7,736
RE Commercial [Member] | B [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	272		298
RE Commercial [Member] | CCC-C [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	211		238
Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,070		1,036
Commercial Real Estate Construction Financing Receivable [Member] | AAA-AA [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans			1
Commercial Real Estate Construction Financing Receivable [Member] | BBB-BB [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	935		895
Commercial Real Estate Construction Financing Receivable [Member] | B [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	89		100
Commercial Real Estate Construction Financing Receivable [Member] | CCC-C [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	46		40
Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	3,929		4,135
Commercial Leases [Member] | AAA-AA [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	501		528
Commercial Leases [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	478		596
Commercial Leases [Member] | BBB-BB [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,808		2,848
Commercial Leases [Member] | B [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	88		75
Commercial Leases [Member] | CCC-C [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	54		88
Commercial Loan Portfolios [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	44,274		40,130
Commercial Loan Portfolios [Member] | AAA-AA [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	888		873
Commercial Loan Portfolios [Member] | A [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,921		1,745
Commercial Loan Portfolios [Member] | BBB-BB [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	38,871		35,301
Commercial Loan Portfolios [Member] | B [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,088		1,067
Commercial Loan Portfolios [Member] | CCC-C [Member]
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 1,506		$ 1,144

Asset Quality - Credit Risk Pro

Asset Quality - Credit Risk Profile by Regulatory Classifications (Detail) - Residential - Prime, Financing Receivable [Member] - USD ($) $ in Millions	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Total	$ 12,759	$ 12,863
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	12,496	12,576
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 263	$ 287

Asset Quality - Credit Risk P64

Asset Quality - Credit Risk Profile Based on Payment Activity (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	$ 60,085	$ 57,381	$ 56,155
Consumer Other - Key Community Bank [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	1,612	1,560	1,546
Consumer Other - Key Community Bank [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	1,611		1,544
Consumer Other - Key Community Bank [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	1		2
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	770	754	724
Consumer Credit Card Financing Receivable [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	768		723
Consumer Credit Card Financing Receivable [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	2		1
Consumer Marine [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	620	779	828
Consumer Marine [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	614		812
Consumer Marine [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	6		16
Consumer Others [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	38	49	51
Consumer Others [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	37		50
Consumer Others [Member] | Nonperforming [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	1		1
Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	15,811	$ 16,000	16,025
Consumer Loans [Member] | Credit Risk Profile [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	3,040		3,149
Consumer Loans [Member] | Performing [Member] | Credit Risk Profile [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	3,030		3,129
Consumer Loans [Member] | Nonperforming [Member] | Credit Risk Profile [Member]
Financing Receivable, Recorded Investment [Line Items]
Credit risk profile based on payment	$ 10		$ 20

Asset Quality - Summary of Allo

Asset Quality - Summary of Allowance for Loan and Lease Losses (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Beginning balance			$ 823	$ 887
Charge-offs			(177)	(196)
Recoveries			57	92
Provision for loan and lease losses from continuing operations	$ 45	$ 19	121	35
Foreign currency translation adjustment			(1)
Ending balance	813	835	813	835
Continuing Operations [Member]
Financing Receivable, Recorded Investment [Line Items]
Beginning balance	796	814	794	848
Charge-offs	(53)	(49)	(152)	(162)
Recoveries	12	18	47	81
Net loans and leases charged off	(41)	(31)	(105)	(81)
Provision for loan and lease losses from continuing operations	36	21	102	37
Foreign currency translation adjustment	(1)		(1)
Ending balance	$ 790	$ 804	$ 790	$ 804

Asset Quality - Changes in Allo

Asset Quality - Changes in Allowance for Loan and Lease Losses by Loan Category (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			$ 823	$ 887
Provision			110	52
Charge-offs			(177)	(196)
Recoveries			57	92
Ending balance	$ 813	$ 835	813	835
Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance	796	814	794	848
Provision			101	37
Charge-offs	(53)	(49)	(152)	(162)
Recoveries	12	18	47	81
Ending balance	790	804	790	804
Continuing Operations [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			391	362
Provision			93	32
Charge-offs			(59)	(35)
Recoveries			13	27
Ending balance	438	386	438	386
Continuing Operations [Member] | Commercial Real Estate: Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			148	165
Provision			(9)	(7)
Charge-offs			(2)	(3)
Recoveries			2	4
Ending balance	139	159	139	159
Continuing Operations [Member] | Commercial Real Estate Construction Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			28	32
Provision			(3)	(16)
Charge-offs			(1)	(4)
Recoveries			1	16
Ending balance	25	28	25	28
Continuing Operations [Member] | Commercial Lease Financing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			56	62
Provision			(13)	(9)
Charge-offs			(5)	(6)
Recoveries			7	8
Ending balance	45	55	45	55
Continuing Operations [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			623	621
Provision			68
Charge-offs			(67)	(48)
Recoveries			23	55
Ending balance	647	628	647	628
Continuing Operations [Member] | Real Estate - Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			23	37
Provision			(1)	(10)
Charge-offs			(4)	(7)
Recoveries			1	2
Ending balance	19	22	19	22
Continuing Operations [Member] | Home Equity: Key Community Bank [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			66	84
Provision			4	9
Charge-offs			(21)	(29)
Recoveries			5	7
Ending balance	54	71	54	71
Continuing Operations [Member] | Home Equity: Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			5	11
Provision			(1)	(1)
Charge-offs			(4)	(8)
Recoveries			4	4
Ending balance	4	6	4	6
Continuing Operations [Member] | Home Equity Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			71	95
Provision			3	8
Charge-offs			(25)	(37)
Recoveries			9	11
Ending balance	58	77	58	77
Continuing Operations [Member] | Consumer Other - Key Community Bank [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			22	29
Provision			11	14
Charge-offs			(18)	(23)
Recoveries			5	4
Ending balance	20	24	20	24
Continuing Operations [Member] | Credit Cards [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			33	34
Provision			20	24
Charge-offs			(23)	(27)
Recoveries			2	1
Ending balance	32	32	32	32
Continuing Operations [Member] | Consumer Marine [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			21	29
Provision				1
Charge-offs			(14)	(18)
Recoveries			6	7
Ending balance	13	19	13	19
Continuing Operations [Member] | Consumer Others [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			1	3
Charge-offs			(1)	(2)
Recoveries			1	1
Ending balance	1	2	1	2
Continuing Operations [Member] | Consumer Other - Key Corporate Bank [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			22	32
Provision				1
Charge-offs			(15)	(20)
Recoveries			7	8
Ending balance	14	21	14	21
Continuing Operations [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			171	227
Provision			33	37
Charge-offs			(85)	(114)
Recoveries			24	26
Ending balance	143	176	143	176
Discontinued Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Beginning balance			29	39
Provision			9	15
Charge-offs				(34)
Charge-offs			(25)
Recoveries			10	11
Ending balance	$ 23	$ 31	$ 23	$ 31

Asset Quality - Changes in Al67

Asset Quality - Changes in Allowance for Loan and Lease Losses by Loan Category (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Receivables [Abstract]
Provision/Credit for losses on lending-related commitments	$ 110	$ 52
Foreign currency translation adjustment	$ 1

Asset Quality - Allowance for L

Asset Quality - Allowance for Loan and Lease Losses and Corresponding Loan Balances (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	$ 60,085	$ 57,381	$ 56,155
Purchase Credit Impairment	12	13	14
Individually Evaluated for Impairment Allowance, Total ALLL - Including Discontinued Operations	38	41	39
Collectively Evaluated for Impairment Allowance, Total ALLL - Including Discontinued Operations	774	781	795
Purchased Credit Impaired Allowance, Total ALLL - Including Discontinued Operations	1	1	1
Loans Outstanding, Total ALLL - Including Discontinued Operations	61,976	59,676	58,547
Individually Evaluated for Impairment Outstanding, Total ALLL - Including Discontinued Operations	338	319	315
Collectively Evaluated for Impairment Outstanding, Total ALLL - Including Discontinued Operations	61,626	59,344	58,218
Purchased Credit Impaired Outstanding, Total ALLL - Including Discontinued Operations	12	13	14
Discontinued Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	2	1	1
Collectively Evaluated for Impairment Allowance	21	28	30
Purchase Credit Impairment Allowance	0
Loans Outstanding	1,891	2,104	2,174
Individually Evaluated for Impairment Outstanding	20	17	16
Collectively Evaluated for Impairment Outstanding	1,871	2,278	2,376
Purchase Credit Impairment	0
Loans Outstanding		2,295	2,392
Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	36	40	38
Collectively Evaluated for Impairment Allowance	753	753	765
Purchase Credit Impairment Allowance	1	1	1
Loans Outstanding	60,085	57,381	56,155
Individually Evaluated for Impairment Outstanding	318	302	299
Collectively Evaluated for Impairment Outstanding	59,755	57,066	55,842
Purchase Credit Impairment	12	13	14
Commercial, Financial and Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	31,095	27,982	26,683
Commercial, Financial and Agricultural [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	9	9	7
Collectively Evaluated for Impairment Allowance	429	382	379
Purchase Credit Impairment Allowance	0
Loans Outstanding	31,095	27,982	26,683
Individually Evaluated for Impairment Outstanding	72	43	31
Collectively Evaluated for Impairment Outstanding	31,023	27,939	26,652
Purchase Credit Impairment	0
Commercial Real Estate: Commercial Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	8,180	8,047	8,276
Commercial Real Estate: Commercial Mortgage [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	1	2	2
Collectively Evaluated for Impairment Allowance	138	146	157
Purchase Credit Impairment Allowance	0
Loans Outstanding	8,180	8,047	8,276
Individually Evaluated for Impairment Outstanding	15	21	29
Collectively Evaluated for Impairment Outstanding	8,165	8,025	8,246
Purchase Credit Impairment	0	1	1
Commercial Real Estate: Construction [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	0	1
Collectively Evaluated for Impairment Allowance	25	27	28
Purchase Credit Impairment Allowance	0
Loans Outstanding	1,070	1,100	1,036
Individually Evaluated for Impairment Outstanding	5	8	10
Collectively Evaluated for Impairment Outstanding	1,065	1,092	1,026
Purchase Credit Impairment	0
Commercial Real Estate Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	9,250	9,147	9,312
Commercial Real Estate Loans [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	1	3	2
Collectively Evaluated for Impairment Allowance	163	173	185
Purchase Credit Impairment Allowance	0
Loans Outstanding	9,250	9,147	9,312
Individually Evaluated for Impairment Outstanding	20	29	39
Collectively Evaluated for Impairment Outstanding	9,230	9,117	9,272
Purchase Credit Impairment	0	1	1
Commercial Lease Financing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	3,929	4,252	4,135
Commercial Lease Financing [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	0
Collectively Evaluated for Impairment Allowance	45	56	55
Purchase Credit Impairment Allowance	0
Loans Outstanding	3,929	4,252	4,135
Individually Evaluated for Impairment Outstanding	0
Collectively Evaluated for Impairment Outstanding	3,929	4,252	4,135
Purchase Credit Impairment	0
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	44,274	41,381	40,130
Commercial Loans [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	10	12	9
Collectively Evaluated for Impairment Allowance	637	611	619
Purchase Credit Impairment Allowance	0
Loans Outstanding	44,274	41,381	40,130
Individually Evaluated for Impairment Outstanding	92	72	70
Collectively Evaluated for Impairment Outstanding	44,182	41,308	40,059
Purchase Credit Impairment	0	1	1
Real Estate - Residential Mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	2,267	2,225	2,213
Real Estate - Residential Mortgage [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	5	5	4
Collectively Evaluated for Impairment Allowance	13	17	17
Purchase Credit Impairment Allowance	1	1	1
Loans Outstanding	2,267	2,225	2,213
Individually Evaluated for Impairment Outstanding	56	55	55
Collectively Evaluated for Impairment Outstanding	2,200	2,159	2,146
Purchase Credit Impairment	11	11	12
Home Equity: Key Community Bank [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	10,282	10,366	10,380
Home Equity: Key Community Bank [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	17	16	16
Collectively Evaluated for Impairment Allowance	37	50	55
Purchase Credit Impairment Allowance	0
Loans Outstanding	10,282	10,366	10,380
Individually Evaluated for Impairment Outstanding	113	108	105
Collectively Evaluated for Impairment Outstanding	10,168	10,257	10,274
Purchase Credit Impairment	1	1	1
Home Equity: Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	222	267	283
Home Equity: Other [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	2	2	2
Collectively Evaluated for Impairment Allowance	2	3	4
Purchase Credit Impairment Allowance	0
Loans Outstanding	222	267	283
Individually Evaluated for Impairment Outstanding	11	12	12
Collectively Evaluated for Impairment Outstanding	211	255	271
Purchase Credit Impairment	0
Home Equity Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	10,504	10,633	10,663
Home Equity Loans [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	19	18	18
Collectively Evaluated for Impairment Allowance	39	53	59
Purchase Credit Impairment Allowance	0
Loans Outstanding	10,504	10,633	10,663
Individually Evaluated for Impairment Outstanding	124	120	117
Collectively Evaluated for Impairment Outstanding	10,379	10,512	10,545
Purchase Credit Impairment	1	1	1
Consumer Other - Key Community Bank [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	1,612	1,560	1,546
Consumer Other - Key Community Bank [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	0
Collectively Evaluated for Impairment Allowance	20	22	24
Purchase Credit Impairment Allowance	0
Loans Outstanding	1,612	1,560	1,546
Individually Evaluated for Impairment Outstanding	3	4	4
Collectively Evaluated for Impairment Outstanding	1,609	1,556	1,542
Purchase Credit Impairment	0
Consumer Credit Card Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	770	754	724
Consumer Credit Card Financing Receivable [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	0		1
Collectively Evaluated for Impairment Allowance	32	33	31
Purchase Credit Impairment Allowance	0
Loans Outstanding	770	754	724
Individually Evaluated for Impairment Outstanding	3	4	3
Collectively Evaluated for Impairment Outstanding	767	750	721
Purchase Credit Impairment	0
Consumer Marine [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	620	779	828
Consumer Marine [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	2	5	5
Collectively Evaluated for Impairment Allowance	11	16	14
Purchase Credit Impairment Allowance	0
Loans Outstanding	620	779	828
Individually Evaluated for Impairment Outstanding	38	45	48
Collectively Evaluated for Impairment Outstanding	582	734	780
Purchase Credit Impairment	0
Consumer Others [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	38	49	51
Consumer Others [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	0		1
Collectively Evaluated for Impairment Allowance	1	1	1
Purchase Credit Impairment Allowance	0
Loans Outstanding	38	49	51
Individually Evaluated for Impairment Outstanding	2	2	2
Collectively Evaluated for Impairment Outstanding	36	47	49
Purchase Credit Impairment	0
Consumer Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	658	828	879
Consumer Other [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	2	5	6
Collectively Evaluated for Impairment Allowance	12	17	15
Purchase Credit Impairment Allowance	0
Loans Outstanding	658	828	879
Individually Evaluated for Impairment Outstanding	40	47	50
Collectively Evaluated for Impairment Outstanding	618	781	829
Purchase Credit Impairment	0
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans Outstanding	15,811	16,000	16,025
Consumer Loans [Member] | Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment Allowance	26	28	29
Collectively Evaluated for Impairment Allowance	116	142	146
Purchase Credit Impairment Allowance	1	1	1
Loans Outstanding	15,811	16,000	16,025
Individually Evaluated for Impairment Outstanding	226	230	229
Collectively Evaluated for Impairment Outstanding	15,573	15,758	15,783
Purchase Credit Impairment	$ 12	$ 12	$ 13

Asset Quality - Allowance for69

Asset Quality - Allowance for Loan and Lease Losses and Corresponding Loan Balances (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2014	Sep. 30, 2014
Receivables [Abstract]
Loans carried at fair value	$ 191	$ 201

Asset Quality - Changes in Liab

Asset Quality - Changes in Liability for Credit Losses on Lending Related Commitments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Receivables [Abstract]
Balance at beginning of period	$ 45	$ 37	$ 35	$ 37
Provision (credit) for losses on lending-related commitments	9	(2)	19	(2)
Balance at end of period	$ 54	$ 35	$ 54	$ 35

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Direct and Indirect Investments, Related Unfunded Commitments and Financial Support Provided (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Indirect Investments [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair Value	$ 9		$ 9
Unfunded Commitments	1		1
Indirect Investments [Member] | Passive Funds [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair Value	9		9
Unfunded Commitments	1		1
Principal Investments [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair Value	337		337
Unfunded Commitments	53		53
Funded Commitments	2	$ 3	7	$ 10
Funded Other			2	2
Principal Investments [Member] | Indirect Investments [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair Value	271		271
Unfunded Commitments	53		53
Funded Commitments	2	$ 3	7	10
Principal Investments [Member] | Direct Investments [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Fair Value	$ 66		66
Funded Other			$ 2	$ 2

Fair Value Measurements - Fai72

Fair Value Measurements - Fair Value of Direct and Indirect Investments, Related Unfunded Commitments and Financial Support Provided (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2015
Minimum [Member] | Passive Funds [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Liquidation period of funds	1 year
Minimum [Member] | Indirect Investments [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Liquidation period of funds	1 year
Maximum [Member] | Passive Funds [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Liquidation period of funds	4 years
Maximum [Member] | Indirect Investments [Member]
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]
Liquidation period of funds	9 years

Fair Value Measurements - Fai73

Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	$ 811	$ 750	$ 965
Securities available for sale	14,376	13,360	12,245
Derivative asset netting adjustments	(945)	(1,034)	(613)
Total derivative assets	793	609	413
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liability netting adjustments	(566)	(542)	(393)
Total derivative liabilities	676	784	384
Collateralized Mortgage Obligations [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	12,003	11,270	10,009
States and Political Subdivisions [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	15	23	27
Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	28	32	32
Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	2,330	2,035	2,177
Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Commercial loans	9	2	1
Total trading account assets	811	750	965
Securities available for sale	14,376	13,360	12,245
Total other investments	350	420	485
Derivative assets	1,738	1,643	1,026
Derivative asset netting adjustments	(945)	(1,034)	(613)
Total derivative assets	793	609	413
Accrued income and other assets	2
Total assets at fair value	16,332	15,139	14,108
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	1,242	1,326	777
Derivative liability netting adjustments	(566)	(542)	(393)
Total derivative liabilities	676	784	384
Accrued expense and other liabilities	2
Total liabilities on a recurring basis at fair value	1,355	1,207	880
Recurring [Member] | Collateralized Mortgage Obligations [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	12,003	11,270	10,009
Recurring [Member] | Trading Account Assets [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	802	748	964
Recurring [Member] | U.S. Treasury, Agencies and Corporations [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	694	555	596
Recurring [Member] | States and Political Subdivisions [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	35	38	24
Securities available for sale	15	23	27
Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	27	31	158
Securities available for sale	28	32	32
Recurring [Member] | Principal Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	66	104	115
Recurring [Member] | Principal Investments Indirect [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	271	302	353
Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	4	4	4
Recurring [Member] | Principal Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	337	406	468
Recurring [Member] | Equity and Mezzanine Investments Indirect [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	9	10	13
Recurring [Member] | Private Equity and Mezzanine Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	9	10	13
Recurring [Member] | Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	46	124	186
Securities available for sale	2,330	2,035	2,177
Recurring [Member] | Short Positions [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	677	423	496
Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	1,119	937	846
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	656	644	616
Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	130	93	81
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	112	81	64
Recurring [Member] | Commodity [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	482	608	95
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	469	594	90
Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	7	5	4
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	5	7	7
Level 1 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account assets	4	2	13
Securities available for sale	11	22	22
Total other investments		2
Derivative assets	120	91	73
Total derivative assets	120	91	73
Total assets at fair value	135	117	108
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	102	77	55
Total derivative liabilities	102	77	55
Total liabilities on a recurring basis at fair value	102	77	61
Level 1 [Member] | Recurring [Member] | Trading Account Assets [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	4	2	13
Level 1 [Member] | Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	4	2	13
Securities available for sale	11	22	22
Level 1 [Member] | Recurring [Member] | Principal Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments		2
Level 1 [Member] | Recurring [Member] | Principal Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments		2
Level 1 [Member] | Recurring [Member] | Short Positions [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities			6
Level 1 [Member] | Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	120	91	73
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	102	77	55
Level 2 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Commercial loans	9	2	1
Total trading account assets	807	748	952
Securities available for sale	14,348	13,328	12,213
Derivative assets	1,593	1,536	931
Total derivative assets	1,593	1,536	931
Accrued income and other assets	2
Total assets at fair value	16,750	15,612	14,096
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	1,140	1,248	721
Total derivative liabilities	1,140	1,248	721
Accrued expense and other liabilities	2
Total liabilities on a recurring basis at fair value	1,819	1,671	1,211
Level 2 [Member] | Recurring [Member] | Collateralized Mortgage Obligations [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	12,003	11,270	10,009
Level 2 [Member] | Recurring [Member] | Trading Account Assets [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	798	746	951
Level 2 [Member] | Recurring [Member] | U.S. Treasury, Agencies and Corporations [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	694	555	596
Level 2 [Member] | Recurring [Member] | States and Political Subdivisions [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	35	38	24
Securities available for sale	15	23	27
Level 2 [Member] | Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	23	29	145
Level 2 [Member] | Recurring [Member] | Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	46	124	186
Securities available for sale	2,330	2,035	2,177
Level 2 [Member] | Recurring [Member] | Short Positions [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	677	423	490
Level 2 [Member] | Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	1,097	924	827
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	656	644	616
Level 2 [Member] | Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	10	2	8
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	10	4	9
Level 2 [Member] | Recurring [Member] | Commodity [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	482	608	95
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	469	594	89
Level 2 [Member] | Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	4	2	1
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities	5	6	7
Level 3 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	17	10	10
Total other investments	350	418	485
Derivative assets	25	16	22
Total derivative assets	25	16	22
Total assets at fair value	392	444	517
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities		1	1
Total derivative liabilities		1	1
Total liabilities on a recurring basis at fair value		1	1
Level 3 [Member] | Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	17	10	10
Level 3 [Member] | Recurring [Member] | Principal Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	66	102	115
Level 3 [Member] | Recurring [Member] | Principal Investments Indirect [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	271	302	353
Level 3 [Member] | Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	4	4	4
Level 3 [Member] | Recurring [Member] | Principal Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	337	404	468
Level 3 [Member] | Recurring [Member] | Equity and Mezzanine Investments Indirect [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	9	10	13
Level 3 [Member] | Recurring [Member] | Private Equity and Mezzanine Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	9	10	13
Level 3 [Member] | Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	22	13	19
Level 3 [Member] | Recurring [Member] | Commodity [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities			1
Level 3 [Member] | Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets	$ 3	3	$ 3
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities		$ 1

Fair Value Measurements - Chang

Fair Value Measurements - Change in Fair Values of Level 3 Financial Instruments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Securities Available for Sale [Member] | Other Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 10		$ 10
Purchases	7	$ 10	7	$ 10
Ending Balance	17	10	17	10
Other Investments [Member] | Principal Investments Direct [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	70	146	102	141
Gains (Losses) Included in Earnings	4	(2)	20	9
Purchases	3		5	1
Sales	(11)	(29)	(61)	(36)
Ending Balance	66	115	66	115
Unrealized Gains (Losses) Included in Earnings	3	(2)		18
Other Investments [Member] | Principal Investments Indirect [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	282	399	302	413
Gains (Losses) Included in Earnings	8	9	33	(49)
Purchases	2	3	6	8
Sales	(21)	(58)	(70)	(117)
Ending Balance	271	353	271	353
Unrealized Gains (Losses) Included in Earnings	(8)	(4)	(23)	8
Other Investments [Member] | Equity and Mezzanine Investments Direct [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Gains (Losses) Included in Earnings			2
Sales			(2)
Unrealized Gains (Losses) Included in Earnings			2
Other Investments [Member] | Equity and Mezzanine Investments Indirect [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	9	16	10	23
Gains (Losses) Included in Earnings			6	(1)
Sales		(3)	(7)	(9)
Ending Balance	9	13	9	13
Unrealized Gains (Losses) Included in Earnings			6	(1)
Other Investments [Member] | Other [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	4	4	4	4
Ending Balance	4	4	4	4
Interest Rate [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	16	20	13	25
Gains (Losses) Included in Earnings	6		5	2
Purchases			1	3
Sales				(2)
Transfers into Level 3	2	2	10	7
Transfers out of Level 3	(2)	(3)	(7)	(16)
Ending Balance	22	19	22	19
Commodity [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance		1
Purchases		(1)		(1)
Transfers into Level 3				1
Transfers out of Level 3		(1)		(1)
Ending Balance		(1)		(1)
Credit [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning Balance	3	3	2	3
Gains (Losses) Included in Earnings	(3)	(2)	(7)	(7)
Sales	8		8
Settlements	(5)	2		7
Ending Balance	$ 3	$ 3	$ 3	$ 3

Fair Value Measurements - Cha75

Fair Value Measurements - Change in Fair Values of Level 3 Financial Instruments (Parenthetical) (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Fair Value Disclosures [Abstract]
Issuance of financial instrument	$ 0	$ 0

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities measured at fair value on non recurring basis	$ 0	$ 0	$ 0
Loans held for sale adjusted to fair value	$ 0	0	0
Fair value of OREO property re-evaluated period	90 days
Loans, net of allowance	$ 59,295,000,000	56,587,000,000	55,351,000,000
Loan securitization trust VIEs, fair value	$ 169,000,000
Loans in portfolio		191,000,000	201,000,000
Average maturity of short-term financial instruments	Less than six months
Residential Real Estate Mortgage Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	$ 2,300,000,000	2,200,000,000	2,200,000,000
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans held for sale adjusted to fair value	916,000,000	734,000,000	784,000,000
Fair Value [Member] | Discontinued Operations [Member] | Education Lending [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	1,500,000,000	1,800,000,000	1,900,000,000
Loans in portfolio		191,000,000	201,000,000
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	59,295,000,000	56,587,000,000	55,351,000,000
Carrying Amount [Member] | Discontinued Operations [Member] | Education Lending [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	$ 1,900,000,000	$ 2,100,000,000	$ 2,100,000,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
ASSETS MEASURED ON A NONRECURRING BASIS
Loans held for sale	$ 0	$ 0	$ 0
Nonrecurring [Member]
ASSETS MEASURED ON A NONRECURRING BASIS
Impaired loans	3,000,000	5,000,000	6,000,000
Loans held for sale	0	0	0
Accrued income and other assets	6,000,000	7,000,000	4,000,000
Total assets at fair value	9,000,000	12,000,000	10,000,000
Level 1 [Member] | Nonrecurring [Member]
ASSETS MEASURED ON A NONRECURRING BASIS
Loans held for sale	0	0	0
Level 2 [Member] | Nonrecurring [Member]
ASSETS MEASURED ON A NONRECURRING BASIS
Loans held for sale	0	0	0
Level 3 [Member] | Nonrecurring [Member]
ASSETS MEASURED ON A NONRECURRING BASIS
Impaired loans	3,000,000	5,000,000	6,000,000
Loans held for sale	0	0	0
Accrued income and other assets	6,000,000	7,000,000	4,000,000
Total assets at fair value	$ 9,000,000	$ 12,000,000	$ 10,000,000

Fair Value Measurements - Ass78

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Nonrecurring [Member]
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]
Transfer of commercial and consumer loans from held-for-sale to held-to-maturity, current fair value	$ 24	$ 10	$ 11

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative Information about Level 3 Fair Value Measurements (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments	$ 691	$ 760	$ 822
Goodwill	1,060	1,057	1,051
Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	3	5	6
Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments	66	102	115
Level 3 [Member] | Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	3	5	6
Goodwill	$ 1,060	$ 1,057	$ 1,051
Level 3 [Member] | Impaired Loans [Member] | Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value measurement, valuation technique	Fair value of underlying collateral
Level 3 [Member] | Goodwill [Member] | Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value measurement, valuation technique	Discounted cash flow and market data
Level 3 [Member] | Other Investments [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value measurement, valuation technique	Individual analysis of the condition of each investment
Level 3 [Member] | Discount [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	6.00%
Level 3 [Member] | Discount [Member] | Nonrecurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	0.00%	10.00%	10.00%
Level 3 [Member] | Discount [Member] | Nonrecurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	50.00%	64.00%	90.00%
Level 3 [Member] | Discount [Member] | Nonrecurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	14.00%	62.00%	24.00%
Level 3 [Member] | Equity Instruments of Public Companies [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value measurement, valuation technique	Market approach
Level 3 [Member] | EBITDA Multiple [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		5.40%	6.00%
Level 3 [Member] | EBITDA Multiple [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		6.00%	6.40%
Level 3 [Member] | EBITDA Multiple [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	5.40%	5.50%	6.30%
Level 3 [Member] | EBITDA Multiple (Where Applicable) [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	5.40%	5.50%	5.50%
Level 3 [Member] | EBITDA Multiple (Where Applicable) [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	6.50%	6.20%	6.00%
Level 3 [Member] | EBITDA Multiple (Where Applicable) [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	6.40%	5.80%	5.70%
Level 3 [Member] | Earnings Multiple of Peers [Member] | Nonrecurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Significant unobservable input	11.40%	11.40%	10.10%
Level 3 [Member] | Earnings Multiple of Peers [Member] | Nonrecurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Significant unobservable input	15.90%	15.90%	14.40%
Level 3 [Member] | Earnings Multiple of Peers [Member] | Nonrecurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Significant unobservable input	12.92%	12.92%	11.59%
Level 3 [Member] | Equity Multiple of Peers [Member] | Nonrecurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Significant unobservable input	1.20%	1.20%	1.17%
Level 3 [Member] | Equity Multiple of Peers [Member] | Nonrecurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Significant unobservable input	1.22%	1.22%	1.29%
Level 3 [Member] | Equity Multiple of Peers [Member] | Nonrecurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Significant unobservable input	1.21%	1.21%	1.24%
Level 3 [Member] | Control Premium [Member] | Nonrecurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	10.00%	10.00%
Level 3 [Member] | Control Premium [Member] | Nonrecurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	30.00%	30.00%
Level 3 [Member] | Control Premium [Member] | Nonrecurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	19.70%	19.70%	35.00%
Level 3 [Member] | Weighted-average Cost of Capital [Member] | Nonrecurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	13.00%	13.00%
Level 3 [Member] | Weighted-average Cost of Capital [Member] | Nonrecurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	14.00%	14.00%
Level 3 [Member] | Weighted-average Cost of Capital [Member] | Nonrecurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	13.52%	13.52%	13.00%
Level 3 [Member] | Revenue Multiple (Where Applicable) [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		4.30%	4.30%
Level 3 [Member] | Revenue Multiple (Where Applicable) [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		4.30%	4.30%
Level 3 [Member] | Revenue Multiple (Where Applicable) [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		4.30%	4.30%

Fair Value Measurements - Fai80

Fair Value Measurements - Fair Value Disclosures of Financial Instruments (Detail) - USD ($)	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014
ASSETS
Trading account assets	$ 811,000,000		$ 750,000,000	$ 965,000,000
Securities available for sale	14,376,000,000		13,360,000,000	12,245,000,000
Held-to-maturity securities	4,940,000,000		4,974,000,000	4,911,000,000
Held-to-maturity securities	4,936,000,000		5,015,000,000	4,997,000,000
Other investments	691,000,000		760,000,000	822,000,000
Loans, net of allowance			191,000,000	201,000,000
Loans, net of allowance	59,295,000,000		56,587,000,000	55,351,000,000
Loans held for sale	0		0	0
Loans held for sale	916,000,000	$ 835,000,000	734,000,000	784,000,000	$ 435,000,000
Derivative assets	793,000,000		609,000,000	413,000,000
LIABILITIES
Long-term debt	10,310,000,000		7,875,000,000	7,172,000,000
Derivative liabilities	676,000,000		784,000,000	384,000,000
Derivative liabilities, netting adjustment	0		0	0
Carrying Amount [Member]
ASSETS
Cash and short-term investments	2,434,000,000		4,922,000,000	2,993,000,000
Trading account assets	811,000,000		750,000,000	965,000,000
Securities available for sale	14,376,000,000		13,360,000,000	12,245,000,000
Held-to-maturity securities	4,936,000,000		5,015,000,000	4,997,000,000
Other investments	691,000,000		760,000,000	822,000,000
Loans, net of allowance	59,295,000,000		56,587,000,000	55,351,000,000
Loans held for sale	916,000,000		734,000,000	784,000,000
Mortgage servicing assets				308,000,000
Derivative assets	793,000,000		609,000,000	413,000,000
LIABILITIES
Deposits with no stated maturity	65,624,000,000		66,135,000,000	62,028,000,000
Time deposits	5,449,000,000		5,863,000,000	6,428,000,000
Short-term borrowings	1,084,000,000		998,000,000	1,653,000,000
Long-term debt	10,310,000,000		7,875,000,000	7,172,000,000
Derivative liabilities	676,000,000		784,000,000	384,000,000
Fair Value [Member]
ASSETS
Cash and short-term investments	2,434,000,000		4,922,000,000	2,993,000,000
Trading account assets	811,000,000		750,000,000	965,000,000
Securities available for sale	14,376,000,000		13,360,000,000	12,245,000,000
Held-to-maturity securities	4,940,000,000		4,974,000,000	4,911,000,000
Other investments	691,000,000		760,000,000	822,000,000
Loans, net of allowance	57,497,000,000		54,993,000,000	53,996,000,000
Loans held for sale	916,000,000		734,000,000	784,000,000
Mortgage servicing assets				370,000,000
Derivative assets	793,000,000		609,000,000	413,000,000
LIABILITIES
Deposits with no stated maturity	65,624,000,000		66,135,000,000	62,028,000,000
Time deposits	5,502,000,000		5,925,000,000	6,493,000,000
Short-term borrowings	677,000,000		998,000,000	1,653,000,000
Long-term debt	10,609,000,000		8,251,000,000	8,056,000,000
Derivative liabilities	676,000,000		784,000,000	384,000,000
Fair Value [Member] | Level 1 [Member]
ASSETS
Cash and short-term investments	2,434,000,000		4,922,000,000	2,993,000,000
Trading account assets	4,000,000		2,000,000	13,000,000
Securities available for sale	11,000,000		22,000,000	22,000,000
Other investments			2,000,000
Derivative assets	120,000,000		91,000,000	73,000,000
LIABILITIES
Time deposits	427,000,000		564,000,000	556,000,000
Short-term borrowings				6,000,000
Long-term debt	10,146,000,000		7,625,000,000	6,854,000,000
Derivative liabilities	102,000,000		77,000,000	55,000,000
Fair Value [Member] | Level 2 [Member]
ASSETS
Trading account assets	807,000,000		748,000,000	952,000,000
Securities available for sale	14,348,000,000		13,328,000,000	12,213,000,000
Held-to-maturity securities	4,940,000,000		4,974,000,000	4,911,000,000
Derivative assets	1,593,000,000		1,536,000,000	931,000,000
LIABILITIES
Deposits with no stated maturity	65,624,000,000		66,135,000,000	62,028,000,000
Time deposits	5,075,000,000		5,361,000,000	5,937,000,000
Short-term borrowings	677,000,000		998,000,000	1,647,000,000
Long-term debt	463,000,000		626,000,000	1,202,000,000
Derivative liabilities	1,140,000,000		1,248,000,000	721,000,000
Fair Value [Member] | Level 3 [Member]
ASSETS
Securities available for sale	17,000,000		10,000,000	10,000,000
Other investments	691,000,000		758,000,000	822,000,000
Loans, net of allowance	57,497,000,000		54,993,000,000	53,996,000,000
Loans held for sale	916,000,000		734,000,000	784,000,000
Mortgage servicing assets				370,000,000
Derivative assets	25,000,000		16,000,000	22,000,000
LIABILITIES
Derivative liabilities			1,000,000	1,000,000
Fair Value [Member] | Netting Adjustment [Member]
ASSETS
Derivative assets, netting adjustment	(945,000,000)		(1,034,000,000)	(613,000,000)
LIABILITIES
Derivative liabilities, netting adjustment	$ (566,000,000)		$ (542,000,000)	$ (393,000,000)

Securities - Details of Securit

Securities - Details of Securities (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 14,288	$ 13,365	$ 12,306
Gross Unrealized Gains	151	132	138
Gross Unrealized Losses	63	137	199
Fair Value	14,376	13,360	12,245
Held to maturities, Amortized Cost	4,936	5,015	4,997
Held to maturities, Gross Unrealized Gains	27	16	10
Held to maturities, Gross Unrealized Losses	23	57	96
Held to maturities, Fair Value	4,940	4,974	4,911
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	27	29	28
Gross Unrealized Gains	1	3	4
Fair Value	28	32	32
Held to maturities, Amortized Cost	20	20	20
Held to maturities, Fair Value	20	20	20
States and Political Subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14	22	26
Gross Unrealized Gains	1	1	1
Fair Value	15	23	27
Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11,938	11,310	10,096
Gross Unrealized Gains	127	96	109
Gross Unrealized Losses	62	136	196
Fair Value	12,003	11,270	10,009
Held to maturities, Amortized Cost	4,299	4,755	4,977
Held to maturities, Gross Unrealized Gains	24	15	10
Held to maturities, Gross Unrealized Losses	23	57	96
Held to maturities, Fair Value	4,300	4,713	4,891
Other Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,309	2,004	2,156
Gross Unrealized Gains	22	32	24
Gross Unrealized Losses	1	1	3
Fair Value	2,330	2,035	$ 2,177
Held to maturities, Amortized Cost	617	240
Held to maturities, Gross Unrealized Gains	3	1
Held to maturities, Fair Value	$ 620	$ 241

Securities - Available for Sale

Securities - Available for Sale Securities (Unrealized Loss Position) (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Held-to-maturity Securities, Gross unrealized losses	$ 23	$ 57	$ 96
Fair value less than 12 months, total temporarily impaired securities	1,520	4,028	2,705
Gross unrealized losses less than 12 months, total temporarily impaired securities	5	63	21
Fair value 12 months or longer, total temporarily impaired securities	4,706	5,006	6,804
Gross unrealized losses 12 months or longer, total temporarily impaired securities	81	131	274
Fair value, total temporarily impaired securities	6,226	9,034	9,509
Gross unrealized losses, total temporarily impaired securities	86	194	295
Collateralized Mortgage Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	770	3,019	605
Gross unrealized losses, less than 12 months	3	52	7
Fair value, 12 months or longer	3,348	2,932	4,379
Gross unrealized losses, 12 months or longer	59	84	189
Fair Value	4,118	5,951	4,984
Gross unrealized losses, Total	62	136	196
Held-to-maturity Securities, Fair Value less than 12 months	214	1,005	1,288
Held-to-maturity Securities, Gross unrealized losses, less than 12 months	1	11	13
Held-to-maturity Securities, Fair Value 12 months or longer	1,355	1,994	2,342
Held-to-maturity Securities, Gross unrealized losses, 12 months or longer	22	46	83
Held-to-maturity Securities, Fair Value	1,569	2,999	3,630
Held-to-maturity Securities, Gross unrealized losses	23	57	96
Other Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	420		811
Gross unrealized losses, less than 12 months	1		1
Fair value, 12 months or longer		78	81
Gross unrealized losses, 12 months or longer		1	2
Fair Value	420	78	892
Gross unrealized losses, Total	1	1	3
Held-to-maturity Securities, Fair Value less than 12 months	110
Held-to-maturity Securities, Fair Value	110
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	2	4	1
Fair value, 12 months or longer	3	2	2
Fair Value	5	$ 6	$ 3
Held-to-maturity Securities, Fair Value less than 12 months	4
Held-to-maturity Securities, Fair Value	$ 4

Securities - Available for Sa83

Securities - Available for Sale Securities (Unrealized Loss Position) (Parenthetical) (Detail) - Maximum [Member] - Other Securities [Member] - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized losses, available for sale securities	$ 1,000,000	$ 1,000,000	$ 1,000,000
Gross unrealized losses, held-to-maturity securities	$ 1,000,000

Securities - Additional Informa

Securities - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)MortgageLoanPositions	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)MortgageLoanPositions
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized loss attributable to collateralized mortgage obligations	$ 62,000,000		$ 62,000,000
Number of fixed rate collateralized mortgage obligations | MortgageLoan	56		56
Weighted-average maturity collateralized mortgage, in years			4 years 2 months 12 days
Weighted-average maturity mortgage-backed securities, in years			5 years 2 months 12 days
Impairment recognized in earnings	$ 0	$ 0
Pledged available for sale and held-to-maturity securities	$ 6,500,000,000		$ 6,500,000,000
Other Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Gross unrealized loss attributable to mortgage-backed securities			$ 1,000,000
Number of other mortgage-backed securities positions | Positions	17		17

Securities - Cumulative Credit

Securities - Cumulative Credit Portion of Impairments on Debt Securities (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2015USD ($)
Investments, Debt and Equity Securities [Abstract]
Cumulative Impairments on Debt Securities, Beginning Balance	$ 4
Impairment recognized in earnings	0
Cumulative Impairments on Debt Securities, Ending Balance	$ 4

Securities - Available for Sa86

Securities - Available for Sale Securities Realized Gains and Losses (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015USD ($)
Investments, Debt and Equity Securities [Abstract]
Realized gains	$ 0
Realized losses	1
Net securities gains (losses)	$ (1)

Securities - Securities by Matu

Securities - Securities by Maturity (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Amortized Cost of Securities Available for sale, Due in one year or less	$ 297
Amortized Cost of Securities Available for sale, Due after one through five years	12,659
Amortized Cost of Securities Available for sale, Due after five through ten years	1,329
Amortized Cost of Securities Available for sale, Due after ten years	3
Total Amortized Cost of Securities Available for sale	14,288
Fair Value of Securities Available for sale, Due in one year or less	302
Fair Value of Securities Available for sale, Due after one through five years	12,735
Fair Value of Securities Available for sale, Due after five through ten years	1,336
Fair Value of Securities Available for sale, Due after ten years	3
Total Fair Value of Securities Available for sale	14,376
Amortized Cost of Held-to-Maturity Securities, Due in one year or less	9
Amortized Cost of Held-to-Maturity Securities, Due after one through five years	4,310
Amortized Cost of Held-to-Maturity Securities, Due after five through ten years	617
Amortized Cost of Held-to-Maturity Securities, Due after ten years	0
Held to maturities, Amortized Cost	4,936	$ 5,015	$ 4,997
Fair Value of Held-to-Maturity Securities, Due in one year or less	9
Fair Value of Held-to-Maturity Securities, Due after one through five years	4,311
Fair Value of Held-to-Maturity Securities, Due after five through ten years	620
Fair Value of Held-to-Maturity Securities, Due after ten years	0
Total Fair Value of Held-to-Maturity Securities	$ 4,940	$ 4,974	$ 4,911

Derivatives and Hedging Activ88

Derivatives and Hedging Activities - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015USD ($)CounterpartyCreditRatings	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)
Credit Derivatives [Line Items]
Derivative assets after effects of bilateral collateral and master netting agreements	$ 157,000,000
Derivative liabilities after effects of bilateral collateral and master netting agreements	34,000,000
Derivative assets not designated as hedging instruments after effects of bilateral collateral and master netting agreements, and a reserve for potential future losses	636,000,000
Derivative liabilities not designated as hedging instruments after effects of bilateral collateral and master netting agreements, and a reserve for potential future losses	710,000,000
Reclassify of after-tax net losses on derivative instruments from AOCI	$ 37,000,000
Length of time hedge in cash flow hedge	12 months
Reclassification of net losses related to terminated cash flow hedges from AOCI to income	$ 1,000,000
Maximum length of time over which forecasted transactions are hedged, years	13 years
Other Comprehensive income unrealized gain on derivatives arising during period net of tax	$ 35,000,000
Cash collateral netted against derivative assets	394,000,000	$ 518,000,000	$ 230,000,000
Collateral netted against derivative liabilities	14,000,000	26,000,000	10,000,000
Cash collateral not netted transferred with clearing organization	112,000,000	56,000,000	51,000,000
Cash collateral not netted transferred from clearing organization	105,000,000	0	0
Gross exposure on derivatives, after taking into account the effects of bilateral collateral and master netting agreements	952,000,000
Net exposure on derivatives, after taking into account, the effects of bilateral collateral and master netting agreements	303,000,000
Over-collateralization on derivatives to broker-dealers and banks, after the application of master netting agreements and collateral	172,000,000
Additional collateral held in the form of securities	131,000,000
Default reserve associated with uncollateralized contracts	8,000,000
Gross exposure on derivatives after taking into account effects of master netting agreements	525,000,000
Net exposure on derivatives with clients after application of master netting agreements collateral and related reserve	490,000,000
Letter of credit	$ 30,000,000
Number of counter parties guaranteed | Counterparty	1
Key Corp [Member]
Credit Derivatives [Line Items]
Net liability position totaled	$ 8,000,000
Cash and securities collateral posted	8,000,000
Key Corp [Member] | Maximum [Member]
Credit Derivatives [Line Items]
Additional collateral amount	0	$ 1,000,000	$ 3,000,000
Key Corp [Member] | Maximum [Member] | Unsecured Debt [Member]
Credit Derivatives [Line Items]
Payments to terminate contracts	1,000,000
KeyBank (consolidated) [Member]
Credit Derivatives [Line Items]
Net liability position totaled	249,000,000
Derivative assets included in net liability position	216,000,000
Derivative liabilities included in net liability position	465,000,000
Cash and securities collateral posted	$ 232,000,000
Number of ratings above noninvestment | CreditRatings	4
KeyBank (consolidated) [Member] | Maximum [Member] | Unsecured Debt [Member]
Credit Derivatives [Line Items]
Payments to terminate contracts	$ 7,000,000

Derivatives and Hedging Activ89

Derivatives and Hedging Activities - Fair Values, Volume of Activity and Gain (Loss) Information Related to Derivative Instruments (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Derivatives, Fair Value [Line Items]
Notional Amount	$ 83,370,000,000	$ 65,317,000,000	$ 63,278,000,000
Derivative Assets	680,000,000	454,000,000	342,000,000
Derivative Liabilities	444,000,000	543,000,000	116,000,000
Derivative Asset, Netting adjustments	(945,000,000)	(1,034,000,000)	(613,000,000)
Derivative Liability, Netting adjustments	(566,000,000)	(542,000,000)	(393,000,000)
Derivative Assets	(113,000,000)	(155,000,000)	(71,000,000)
Derivative Liabilities	(232,000,000)	(241,000,000)	(268,000,000)
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	18,229,000,000	15,466,000,000	14,359,000,000
Derivative assets	405,000,000	280,000,000	250,000,000
Derivative liabilities	12,000,000	26,000,000	44,000,000
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	65,141,000,000	49,851,000,000	48,919,000,000
Derivative assets	1,333,000,000	1,363,000,000	776,000,000
Derivative liabilities	1,230,000,000	1,300,000,000	733,000,000
Net Derivatives [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	83,370,000,000	65,317,000,000	63,278,000,000
Derivative Assets	793,000,000	609,000,000	413,000,000
Derivative Liabilities	676,000,000	784,000,000	384,000,000
Interest Rate [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	17,910,000,000	15,095,000,000	13,946,000,000
Derivative assets	394,000,000	272,000,000	237,000,000
Derivative liabilities	12,000,000	26,000,000	44,000,000
Interest Rate [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	57,006,000,000	43,771,000,000	42,088,000,000
Derivative assets	725,000,000	665,000,000	608,000,000
Derivative liabilities	644,000,000	618,000,000	572,000,000
Foreign Exchange [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	319,000,000	371,000,000	413,000,000
Derivative assets	11,000,000	8,000,000	13,000,000
Foreign Exchange [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	6,161,000,000	4,024,000,000	4,433,000,000
Derivative assets	119,000,000	85,000,000	69,000,000
Derivative liabilities	112,000,000	81,000,000	64,000,000
Commodity [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	1,394,000,000	1,544,000,000	1,780,000,000
Derivative assets	482,000,000	608,000,000	95,000,000
Derivative liabilities	469,000,000	594,000,000	90,000,000
Credit [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	580,000,000	512,000,000	618,000,000
Derivative assets	7,000,000	5,000,000	4,000,000
Derivative liabilities	$ 5,000,000	$ 7,000,000	$ 7,000,000

Derivatives and Hedging Activ90

Derivatives and Hedging Activities - Pre-Tax Net Gains (Losses) on Fair Value Hedges (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Derivatives, Fair Value [Line Items]
Net Gains (Losses) on Derivative	$ 157	$ 70
Net Gains (Losses) on Hedged Item	(66)	21
Other Income [Member] | Interest Rate [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) on Derivative	66	(21)
Net Gains (Losses) on Hedged Item	(66)	21
Interest Expense [Member] | Interest Rate [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) on Derivative	$ 91	$ 91

Derivatives and Hedging Activ91

Derivatives and Hedging Activities - Derivative Instrument Cash Flow Hedge Earning Recognized by Income Statement Location (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI (Effective Portion)	$ 170	$ 38
Net Gains (Losses) Reclassified From OCI Into Income (Effective Portion)	70	46
Net Gains (Losses) Recognized in Income (Ineffective Portion)	0	0
Other Income [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in Income (Ineffective Portion)	0	0
Other Income [Member] | Foreign Exchange [Member] | Net Investment Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI (Effective Portion)	29	17
Net Gains (Losses) Recognized in Income (Ineffective Portion)	0	0
Interest Income [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI (Effective Portion)	147	27
Net Gains (Losses) Reclassified From OCI Into Income (Effective Portion)	73	49
Interest Expense [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI (Effective Portion)	(3)	(5)
Net Gains (Losses) Reclassified From OCI Into Income (Effective Portion)	(3)	(3)
Investment Banking and Debt Placement Fees [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI (Effective Portion)	$ (3)	$ (1)

Derivatives and Hedging Activ92

Derivatives and Hedging Activities - After-Tax Change in AOCI Resulting from Cash Flow Hedges (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]
December 31, 2014	$ (8)
2015 Hedging Activity	107
Reclassification of Gains to Net Income	(44)
September 30, 2015	$ 55

Derivatives and Hedging Activ93

Derivatives and Hedging Activities - Pre-Tax Net Gains (Losses) on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	$ 40	$ 23
Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	18	11
Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	27	25
Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	5	3
Credit [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	(10)	(16)
Corporate Services Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	50	39
Corporate Services Income [Member] | Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	18	11
Corporate Services Income [Member] | Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	27	25
Corporate Services Income [Member] | Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	5	3
Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	(10)	(16)
Other Income [Member] | Credit [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gains (Losses), Net	$ (10)	$ (16)

Derivatives and Hedging Activ94

Derivatives and Hedging Activities - Largest Exposure to Individual Counterparty (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Derivative [Line Items]
Net exposure after netting adjustments and collateral	$ 793	$ 609	$ 413
Largest Individual Counterparty [Member]
Derivative [Line Items]
Largest gross exposure (derivative asset) to an individual counterparty	137	133	106
Collateral posted by this counterparty	55	100	44
Derivative liability with this counterparty	78	31	103
Collateral pledged to this counterparty			47
Net exposure after netting adjustments and collateral	$ 4	$ 2	$ 6

Derivatives and Hedging Activ95

Derivatives and Hedging Activities - Fair Value of Derivative Assets by Type (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Credit Derivatives [Line Items]
Derivative assets before collateral	$ 1,187	$ 1,127	$ 643
Less: Related collateral	394	518	230
Total derivative assets	793	609	413
Interest Rate [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	807	607	556
Foreign Exchange [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	48	41	39
Commodity [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	328	478	47
Credit [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	$ 4	$ 1	$ 1

Derivatives and Hedging Activ96

Derivatives and Hedging Activities - Fair Value of Credit Derivatives Purchased and Sold (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Credit Derivatives [Line Items]
Purchased	$ 2	$ (2)	$ (3)
Credit derivatives, net	2	(2)	(3)
Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Purchased	(2)	(3)	(1)
Credit derivatives, net	(2)	(3)	(1)
Traded Credit Default Swap Indices [Member]
Credit Derivatives [Line Items]
Purchased	4	1	(2)
Credit derivatives, net	$ 4	$ 1	$ (2)

Derivatives and Hedging Activ97

Derivatives and Hedging Activities - Fair Value of Credit Derivatives Purchased and Sold (Parenthetical) (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Maximum [Member] | Other [Member]
Credit Derivatives [Line Items]
Fair value of other credit derivatives sold	$ 1	$ 1	$ 1

Derivatives and Hedging Activ98

Derivatives and Hedging Activities - Credit Derivatives Sold and Held (Detail) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Credit Derivatives [Line Items]
Notional Amount	$ 9,000,000	$ 11,000,000	$ 11,000,000
Single Name Credit Default Swaps [Member]
Credit Derivatives [Line Items]
Notional Amount		$ 5,000,000	$ 5,000,000
Average Term (Years)		11 months 19 days	8 months 19 days
Payment / Performance Risk		0.87%	0.87%
Other [Member]
Credit Derivatives [Line Items]
Notional Amount	$ 9,000,000	$ 6,000,000	$ 6,000,000
Average Term (Years)	2 years 11 months 12 days	2 years 11 months 1 day	2 years 10 months 21 days
Payment / Performance Risk	7.45%	5.59%	9.58%

Derivatives and Hedging Activ99

Derivatives and Hedging Activities - Credit Risk Contingent Feature (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	$ 131
Moody's, A3 Rating [Member] | One Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	4	$ 1	$ 1
Moody's, A3 Rating [Member] | Two Rating Downgrades [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	5	1	4
Moody's, A3 Rating [Member] | Three Rating Downgrades [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	6	3	6
Standard & Poor's, A- Rating [Member] | One Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	4	1	1
Standard & Poor's, A- Rating [Member] | Two Rating Downgrades [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	5	1	4
Standard & Poor's, A- Rating [Member] | Three Rating Downgrades [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	$ 6	$ 3	$ 6

Mortgage Servicing Assets - Cha

Mortgage Servicing Assets - Changes in Carrying Amount of Mortgage Servicing Assets (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Servicing Asset [Abstract]
Balance at beginning of period	$ 323	$ 332
Servicing retained from loan sales	39	19
Purchases	29	33
Amortization	(71)	(76)
Balance at end of period	320	308
Fair value at end of period	$ 427	$ 370

Mortgage Servicing Assets - Sch

Mortgage Servicing Assets - Schedule of Range and Weighted-Average of Significant Unobservable Inputs (Detail) - Discounted Cash Flow [Member] - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Weighted Average [Member]
Servicing Assets at Fair Value [Line Items]
Prepayment speed	4.90%	5.90%
Expected defaults	1.70%	1.90%
Residual cash flows discount rate	7.80%	7.80%
Escrow earn rate	2.30%	1.70%
Servicing cost	$ 1,151,000,000	$ 1,053,000,000
Loan assumption rate	1.37%	1.52%
Percentage late	0.33%	0.32%
Minimum [Member]
Servicing Assets at Fair Value [Line Items]
Prepayment speed	1.70%	1.90%
Expected defaults	1.00%	1.00%
Residual cash flows discount rate	7.00%	7.00%
Escrow earn rate	0.90%	0.50%
Servicing cost	$ 150,000,000	$ 150,000,000
Loan assumption rate	0.00%	0.20%
Percentage late	0.00%	0.00%
Maximum [Member]
Servicing Assets at Fair Value [Line Items]
Prepayment speed	16.30%	12.30%
Expected defaults	3.00%	3.00%
Residual cash flows discount rate	15.00%	14.10%
Escrow earn rate	3.50%	3.10%
Servicing cost	$ 2,719,000,000	$ 2,700,000,000
Loan assumption rate	3.00%	3.00%
Percentage late	2.00%	2.00%

Mortgage Servicing Assets - Add

Mortgage Servicing Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Servicing Asset [Abstract]
Contractual fee income from servicing commercial mortgage loans	$ 11	$ 9	$ 33	$ 35

Variable Interest Entities - Va

Variable Interest Entities - Variable Interest Entities Information (Detail) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
LIHTC Funds [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Carrying Amount of Assets, Consolidated VIEs	$ 1	$ 1	$ 1
Variable Interest Entity, Carrying Amount of Liabilities, Consolidated VIEs	1	2	1
Variable Interest Entity, Carrying Amount of Assets, Unconsolidated VIEs	26	55	55
Variable Interest Entity, Carrying Amount of Liabilities, Unconsolidated VIEs	14	36	36
LIHTC Investments, KCDC [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Carrying Amount of Assets, Unconsolidated VIEs	834	775	764
Variable Interest Entity, Carrying Amount of Liabilities, Unconsolidated VIEs	271	263	258
Maximum Exposure to Loss, Unconsolidated VIEs	543	498	507
LIHTC Investments, KAHC [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Carrying Amount of Assets, Unconsolidated VIEs	260	470	470
Variable Interest Entity, Carrying Amount of Liabilities, Unconsolidated VIEs	231	462	462
Maximum Exposure to Loss, Unconsolidated VIEs	$ 14	$ 9	$ 14

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
LIHTC Funds [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Carrying Amount of Assets, Consolidated VIEs	$ 1	$ 1	$ 1
Settlement value of third-party interests, reserves	4
LIHTC Funds [Member] | Minimum [Member]
Variable Interest Entity [Line Items]
Settlement value of third-party interests, approximately	0
LIHTC Funds [Member] | Maximum [Member]
Variable Interest Entity [Line Items]
Settlement value of third-party interests, approximately	4
LIHTC Funds [Member] | Investments [Member]
Variable Interest Entity [Line Items]
Variable Interest Entity, Carrying Amount of Assets, Consolidated VIEs	1	1	$ 1
LIHTC Investments [Member]
Variable Interest Entity [Line Items]
Tax credit of investment	99	84
Investment in LIHTC	1,000	926
LIHTC Investments [Member] | Investments [Member]
Variable Interest Entity [Line Items]
Amortization of investment	$ 85	$ 72

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Total income tax expense (benefit), rate	24.40%	24.10%
Combined federal and state statutory tax rate			37.20%
Federal deferred tax asset	$ 190,000,000	$ 153,000,000	$ 190,000,000	$ 174,000,000
State deferred tax asset	26,000,000	19,000,000	26,000,000	20,000,000
Valuation allowance		1,000,000
Reduction in deferred tax assets	2,800,000	$ 1,000,000		1,000,000
Maximum [Member]
Income Taxes [Line Items]
Valuation allowance	$ 1,000,000		$ 1,000,000	$ 1,000,000

Acquisitions and Discontinue106

Acquisitions and Discontinued Operations - Additional Information (Detail)	Oct. 29, 2015USD ($)	Sep. 30, 2015USD ($)Trust	Jun. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Sep. 30, 2015USD ($)SecurityLoanTrustTDRs	Sep. 30, 2014USD ($)SecurityLoanTrust	Dec. 31, 2014USD ($)SecurityLoan	Dec. 31, 2009Trust
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimated goodwill		$ 1,060,000,000			$ 1,060,000,000	$ 1,051,000,000	$ 1,057,000,000
Trust assets removed		2,086,000,000			2,086,000,000	2,421,000,000	2,324,000,000
Discontinued liabilities		0			0	3,000,000	3,000,000
Allowance for loan held as investment		$ 790,000,000			$ 790,000,000	$ 804,000,000	$ 794,000,000
Number of TDRs | SecurityLoan					4,659	4,730	4,776
Loans at fair value						$ 201,000,000	$ 191,000,000
Number of outstanding securitizations trusts | Trust		3			3
Loans held for sale at fair value		$ 0			$ 0	0	0
Proceeds from loans sold					$ 5,362,000,000	$ 2,832,000,000
Cash portion in gain				$ 6,000,000
Pacific Crest Securities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Business acquisition, date of acquisition					Sep. 3, 2014
Business acquisition intangible asset							13,000,000
Estimated goodwill							78,000,000
Increase in goodwill		3,000,000
Number of outstanding securitization trusts | Trust						3
Proceeds from sale of residual interests						$ 57,000,000
After tax loss recognized						25,000,000
Estimated fair value of the assets and deposits acquired						$ 1,000,000
Number of continuing securitization trusts | Trust						8
Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from loans sold	$ 117,000,000
Trust [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale at fair value		173,000,000			$ 173,000,000
Trust [Member] | Pacific Crest Securities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Trust assets removed						$ 1,700,000,000
Discontinued liabilities						1,600,000,000
Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale at fair value		169,000,000			169,000,000
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of outstanding securitization trusts | Trust								10
Trust assets removed		2,086,000,000			2,086,000,000	2,421,000,000	2,324,000,000
Discontinued liabilities						3,000,000	3,000,000
Economic interest or risk of loss associated with education loan securitization trusts		0			0
Fair value of loans and securities in securitization trusts after tax loss			$ 22,000,000
Discontinued Operations [Member] | Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans at fair value						$ 201,000,000	$ 191,000,000
Loans held for sale at fair value		169,000,000			169,000,000
Education Loans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Investment recorded		20,000,000			20,000,000
Allowance for loan held as investment		$ 2,000,000			$ 2,000,000
Number of TDRs | TDRs					1,845

Acquisitions and Discontinue107

Acquisitions and Discontinued Operations - Components of Income (Loss) from Discontinued Operations, Net of Taxes for Education Lending Business (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income taxes	$ (2)	$ (10)	$ 3	$ (24)
Income (loss) from discontinued operations, net of taxes	(3)	(17)	5	(41)
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net interest income	9	26	29	74
Provision for credit losses	7	5	9	15
Net interest income after provision for credit losses	2	21	20	59
Noninterest income	(2)	(41)	1	(101)
Noninterest expense	5	7	13	23
Income (loss) before income taxes	(5)	(27)	8	(65)
Income taxes	(2)	(10)	3	(24)
Income (loss) from discontinued operations, net of taxes	(3)	(17)	5	(41)
Education Lending [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) before income taxes	(5)	(32)	8	(78)
Income taxes	(2)	(12)	3	(29)
Income (loss) from discontinued operations, net of taxes	(3)	(20)	5	(49)
Education Lending [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net interest income	9	21	29	67
Provision for credit losses	7	5	9	15
Net interest income after provision for credit losses	2	16	20	52
Noninterest income	(2)	(41)	1	(111)
Noninterest expense	$ 5	$ 7	$ 13	$ 19

Acquisitions and Discontinue108

Acquisitions and Discontinued Operations - Components of Income (Loss) from Discontinued Operations, Net of Taxes for Education Lending Business (Parenthetical) (Detail) - Discontinued Operations [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges determined by applying a matched funds transfer pricing methodology to the liabilities assumed necessary to support the discontinued operations, after tax	$ 7	$ 9	$ 18	$ 26
Education Lending [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges determined by applying a matched funds transfer pricing methodology to the liabilities assumed necessary to support the discontinued operations, after tax	$ 7	$ 9	$ 18	$ 26

Acquisitions and Discontinue109

Acquisitions and Discontinued Operations - Components of Assets of Education Lending Business (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans at fair value		$ 191,000,000	$ 201,000,000
Loans, net of unearned income	$ 60,085,000,000	57,381,000,000	56,155,000,000
Loans held for sale at fair value	0	0	0
Total assets	2,086,000,000	2,324,000,000	2,421,000,000
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans, net of unearned income	1,891,000,000	2,104,000,000	2,174,000,000
Less: Allowance for loan and lease losses	23,000,000	29,000,000	31,000,000
Net loans	1,868,000,000	2,266,000,000	2,344,000,000
Accrued income and other assets	33,000,000	38,000,000	40,000,000
Total assets	2,086,000,000	2,324,000,000	2,421,000,000
Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale at fair value	169,000,000
Portfolio [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans at fair value		191,000,000	201,000,000
Loans held for sale at fair value	169,000,000
Education Lending [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Held-to-maturity securities	1,000,000	1,000,000	1,000,000
Loans, net of unearned income	1,891,000,000	2,104,000,000	2,174,000,000
Less: Allowance for loan and lease losses	23,000,000	29,000,000	31,000,000
Net loans	1,868,000,000	2,266,000,000	2,344,000,000
Accrued income and other assets	33,000,000	38,000,000	40,000,000
Total assets	2,071,000,000	2,305,000,000	2,385,000,000
Education Lending [Member] | Portfolio [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans at fair value		$ 191,000,000	$ 201,000,000
Loans held for sale at fair value	$ 169,000,000

Acquisitions and Discontinue110

Acquisitions and Discontinued Operations - Components of Assets of Education Lending Business (Parenthetical) (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unearned income on loans	$ 645,000,000	$ 682,000,000	$ 685,000,000
Maximum [Member] | Education Lending [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unearned income on loans	$ 1,000,000	$ 1,000,000	$ 1,000,000

Acquisitions and Discontinue111

Acquisitions and Discontinued Operations - Quantitative Information about Level 3 Fair Value Measurements (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Portfolio loans held for sale accounted for at fair value	$ 0	$ 0	$ 0
Level 3 [Member] | Portfolio Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Portfolio loans held for sale accounted for at fair value	$ 169,000,000
Portfolio loans accounted for at fair value		$ 191,000,000	$ 201,000,000
Valuation Techniques	Market approach for September 2015 and Discounted cash flow for September and December 2014
Minimum [Member] | Level 3 [Member] | Portfolio Loan Indicative Bids [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	84.50%
Minimum [Member] | Level 3 [Member] | Prepayment Speed Trust Loans and Portfolio Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		5.40%	5.00%
Minimum [Member] | Level 3 [Member] | Loss Severity [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		2.00%	2.00%
Minimum [Member] | Level 3 [Member] | Loan Discount Rates [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		3.90%	3.60%
Minimum [Member] | Level 3 [Member] | Loan Default Rate [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		0.86%	0.93%
Maximum [Member] | Level 3 [Member] | Portfolio Loan Indicative Bids [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs	104.00%
Maximum [Member] | Level 3 [Member] | Prepayment Speed Trust Loans and Portfolio Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		5.60%	5.80%
Maximum [Member] | Level 3 [Member] | Loss Severity [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		77.00%	77.00%
Maximum [Member] | Level 3 [Member] | Loan Discount Rates [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		4.00%	3.90%
Maximum [Member] | Level 3 [Member] | Loan Default Rate [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		1.70%	1.91%
Weighted Average [Member] | Level 3 [Member] | Prepayment Speed Trust Loans and Portfolio Loans [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		5.50%	5.25%
Weighted Average [Member] | Level 3 [Member] | Loss Severity [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		25.66%	25.71%
Weighted Average [Member] | Level 3 [Member] | Loan Discount Rates [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		3.92%	3.69%
Weighted Average [Member] | Level 3 [Member] | Loan Default Rate [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Percentage of significant unobservable inputs		1.12%	1.24%

Acquisitions and Discontinue112

Acquisitions and Discontinued Operations - Principal and Fair Value Amounts for Portfolio Loans Held for Sale at Fair Value, Portfolio Loans at Carrying Value, and Portfolio Loans at Fair Value (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accruing loans past due 90 days or more	$ 54	$ 96	$ 71
Portfolio Loans Held For Sale [Member] | Fair Value [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accruing loans past due 90 days or more	5
Accruing loans past due 90 days or more	4
Portfolio [Member] | Fair Value [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accruing loans past due 90 days or more		5	5
Accruing loans past due 90 days or more		5	5
Portfolio [Member] | Carrying Amount [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accruing loans past due 90 days or more	26	29	31
Loans placed on nonaccrual status	$ 8	$ 11	$ 9

Acquisitions and Discontinue113

Acquisitions and Discontinued Operations - Portfolio Loans Held for Sale at Fair Value and Portfolio Loans at Fair Value and Related Contractual Amounts (Detail) - Discontinued Operations [Member] - Trust [Member] - Education Lending [Member] - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Portfolio contractual amount of loans held for sale	$ 173
Portfolio contractual amount of loans		$ 192	$ 199
Portfolio fair value of loans held for sale	$ 169
Portfolio fair value of loans		$ 191	$ 201

Acquisitions and Discontinue114

Acquisitions and Discontinued Operations - Consolidated Assets at Fair Value on Recurring Basis (Detail) - Recurring [Member] - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
ASSETS MEASURED ON A RECURRING BASIS
Total assets at fair value	$ 16,332	$ 15,139	$ 14,108
Trust [Member] | Education Lending [Member]
ASSETS MEASURED ON A RECURRING BASIS
Portfolio loans held for sale	169
Portfolio loans		191	201
Total assets at fair value	169	191	201
Level 3 [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total assets at fair value	392	444	517
Level 3 [Member] | Trust [Member] | Education Lending [Member]
ASSETS MEASURED ON A RECURRING BASIS
Portfolio loans held for sale	169
Portfolio loans		191	201
Total assets at fair value	$ 169	$ 191	$ 201

Acquisitions and Discontinue115

Acquisitions and Discontinued Operations - Change in Fair Values of Level 3 Portfolio Loans Held for Sale, Portfolio Loans, and Consolidated Education Loan Securitization Trusts (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans held for sale	$ 0	$ 0	$ 0	$ 0	$ 0
Discontinued Operations [Member] | Education Lending [Member] | Portfolio Student Loans Held For Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Beginning Balance	179,000,000
Gains (losses) recognized in earnings	(4,000,000)		(4,000,000)
Settlements	(6,000,000)		(6,000,000)
Loans held for sale	179,000,000		179,000,000
Ending Balance	169,000,000		169,000,000
Discontinued Operations [Member] | Education Lending [Member] | Portfolio Student Loans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Beginning Balance		209,000,000	191,000,000	147,000,000
Gains (losses) recognized in earnings			1,000,000	(4,000,000)
Purchases				74,000,000
Settlements		(8,000,000)	(13,000,000)	(16,000,000)
Loans held for sale	$ (179,000,000)		$ (179,000,000)
Ending Balance		201,000,000		201,000,000
Discontinued Operations [Member] | Education Lending [Member] | Trust Student Loans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Beginning Balance		1,711,000,000		1,960,000,000
Gains (losses) recognized in earnings				(34,000,000)
Sales				(74,000,000)
Settlements		(61,000,000)		(202,000,000)
Transfers out due to deconsolidation		(1,650,000,000)		(1,650,000,000)
Discontinued Operations [Member] | Education Lending [Member] | Trust Other Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Beginning Balance		19,000,000		20,000,000
Settlements				(1,000,000)
Transfers out due to deconsolidation		(19,000,000)		(19,000,000)
Discontinued Operations [Member] | Education Lending [Member] | Trust Other Liabilities [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Beginning Balance		17,000,000		20,000,000
Settlements				(3,000,000)
Transfers out due to deconsolidation		(17,000,000)		(17,000,000)
Discontinued Operations [Member] | Trust Securities [Member] | Education Lending [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Beginning Balance		1,660,000,000		1,834,000,000
Gains (losses) recognized in earnings				33,000,000
Settlements		(71,000,000)		(278,000,000)
Transfers out due to deconsolidation		$ (1,589,000,000)		$ (1,589,000,000)

Acquisitions and Discontinue116

Acquisitions and Discontinued Operations - Change in Fair Values of Level 3 Portfolio Loans Held for Sale, Portfolio Loans, and Consolidated Education Loan Securitization Trusts (Parenthetical) (Detail) - USD ($)	Sep. 30, 2015	Sep. 30, 2014
Education Lending [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Issuances transfers	$ 0	$ 0

Acquisitions and Discontinue117

Acquisitions and Discontinued Operations - Components of Income (Loss) from Discontinued Operations, Net of Taxes (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income taxes	$ (2)	$ (10)	$ 3	$ (24)
Income (loss) from discontinued operations, net of taxes	(3)	(17)	5	(41)
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net interest income	9	26	29	74
Noninterest income	2	41	(1)	101
Noninterest expense	5	7	13	23
Income (loss) before income taxes	(5)	(27)	8	(65)
Income taxes	(2)	(10)	3	(24)
Income (loss) from discontinued operations, net of taxes	$ (3)	(17)	$ 5	(41)
Discontinued Operations [Member] | Victory Capital Management [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net interest income		5		7
Noninterest income				10
Income (loss) before income taxes		5		17
Income taxes		2		7
Income (loss) from discontinued operations, net of taxes		$ 3		10
Discontinued Operations [Member] | Austin Capital Management [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noninterest expense				4
Income (loss) before income taxes				(4)
Income taxes				(2)
Income (loss) from discontinued operations, net of taxes				$ (2)

Acquisitions and Discontinue118

Acquisitions and Discontinued Operations - Components of Assets and Liabilities from Discontinued Operations (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Seller note		$ 191,000,000	$ 201,000,000
Cash and due from banks	$ 470,000,000	653,000,000	651,000,000	$ 617,000,000
Total assets	2,086,000,000	2,324,000,000	2,421,000,000
Total liabilities	0	3,000,000	3,000,000
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and due from banks	15,000,000	19,000,000	19,000,000
Total assets	2,086,000,000	2,324,000,000	2,421,000,000
Total liabilities		3,000,000	3,000,000
Discontinued Operations [Member] | Victory Capital Management [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total assets			17,000,000
Discontinued Operations [Member] | Austin Capital Management [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and due from banks	15,000,000	19,000,000	19,000,000
Total assets	$ 15,000,000	19,000,000	19,000,000
Accrued expense and other liabilities		3,000,000	3,000,000
Total liabilities		$ 3,000,000	3,000,000
Discontinued Operations [Member] | Seller Note [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Seller note			17,000,000
Discontinued Operations [Member] | Seller Note [Member] | Victory Capital Management [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Seller note			$ 17,000,000

Acquisitions and Discontinue119

Acquisitions and Discontinued Operations - Combined Results of Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income taxes	$ (2)	$ (10)	$ 3	$ (24)
Income (loss) from discontinued operations, net of taxes	(3)	(17)	5	(41)
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net interest income	9	26	29	74
Provision for credit losses	7	5	9	15
Net interest income after provision for credit losses	2	21	20	59
Noninterest income	(2)	(41)	1	(101)
Noninterest expense	5	7	13	23
Income (loss) before income taxes	(5)	(27)	8	(65)
Income taxes	(2)	(10)	3	(24)
Income (loss) from discontinued operations, net of taxes	$ (3)	$ (17)	$ 5	$ (41)

Acquisitions and Discontinue120

Acquisitions and Discontinued Operations - Combined Results of Discontinued Operations (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges determined by applying a matched funds transfer pricing methodology to the liabilities assumed necessary to support the discontinued operations, after tax	$ 7	$ 9	$ 18	$ 26

Acquisitions and Discontinue121

Acquisitions and Discontinued Operations - Combined Assets and Liabilities of Discontinued Operations (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and due from banks	$ 470,000,000	$ 653,000,000	$ 651,000,000	$ 617,000,000
Held-to-maturity securities	4,936,000,000	5,015,000,000	4,997,000,000
Portfolio loans at fair value		191,000,000	201,000,000
Loans, net of unearned income	60,085,000,000	57,381,000,000	56,155,000,000
Portfolio loans held for sale at fair value	0	0	0
Total assets	2,086,000,000	2,324,000,000	2,421,000,000
Total liabilities	0	3,000,000	3,000,000
Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Portfolio loans held for sale at fair value	169,000,000
Trust [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Portfolio loans held for sale at fair value	173,000,000
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and due from banks	15,000,000	19,000,000	19,000,000
Held-to-maturity securities	1,000,000	1,000,000	1,000,000
Loans, net of unearned income	1,891,000,000	2,104,000,000	2,174,000,000
Less: Allowance for loan and lease losses	23,000,000	29,000,000	31,000,000
Net loans	1,868,000,000	2,266,000,000	2,344,000,000
Accrued income and other assets	33,000,000	38,000,000	40,000,000
Total assets	2,086,000,000	2,324,000,000	2,421,000,000
Total liabilities		3,000,000	3,000,000
Discontinued Operations [Member] | Seller Note [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Portfolio loans at fair value			17,000,000
Discontinued Operations [Member] | Portfolio [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Portfolio loans at fair value		191,000,000	201,000,000
Portfolio loans held for sale at fair value	$ 169,000,000
Discontinued Operations [Member] | Trust [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accrued expense and other liabilities		$ 3,000,000	$ 3,000,000

Acquisitions and Discontinue122

Acquisitions and Discontinued Operations - Combined Assets and Liabilities of Discontinued Operations (Parenthetical) (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unearned income on loans	$ 645,000,000	$ 682,000,000	$ 685,000,000
Maximum [Member] | Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Unearned income on loans	$ 1,000,000	$ 1,000,000	$ 1,000,000

Securities Financing Activit123

Securities Financing Activities - Summarized Securities Financing Agreements (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Collateral [Member]
Securities Financing Transaction [Line Items]
Reverse repurchase agreements		$ (2)	$ (2)
Total offsetting of financial assets		(2)	(2)
Repurchase agreements	$ (2)
Total offsetting of financial liabilities	(2)
Gross Amount Presented in Balance Sheet [Member]
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	4	3	6
Total offsetting of financial assets	4	3	6
Repurchase agreements	6	1	4
Total offsetting of financial liabilities	6	1	4
Netting Adjustments [Member]
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	(4)	(1)	(4)
Total offsetting of financial assets	(4)	(1)	(4)
Repurchase agreements	(4)	(1)	(4)
Total offsetting of financial liabilities	$ (4)	$ (1)	$ (4)

Employee Benefits - Net Pension

Employee Benefits - Net Pension Cost (Benefit) for Funded and Unfunded Plans (Detail) - Pension Plans [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Interest cost on PBO	$ 10	$ 12	$ 30	$ 36
Expected return on plan assets	(14)	(17)	(42)	(51)
Amortization of losses	4	4	13	12
Settlement loss	19	20	19	20
Net benefit cost	$ 19	$ 19	$ 20	$ 17

Employee Benefits - Additional

Employee Benefits - Additional Information (Detail) - Other Postretirement Benefit Plans [Member]	9 Months Ended
	Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Age of employees under condition one	55 years
Age of employees under condition two	50 years
Period of service under condition one	5 years
Period of service under condition two	15 years
Minimum period of service at the time of termination hired before 2001	15 years
Condition under retiree healthcare plan	We sponsor a retiree healthcare plan that all employees age 55 with five years of service (or employees age 50 with 15 years of service who are terminated under conditions that entitle them to a severance benefit) are eligible to participate.

Employee Benefits - Net Postret

Employee Benefits - Net Postretirement Benefit Cost for Funded and Unfunded Plans (Detail) - Other Postretirement Benefit Plans [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plan Disclosure [Line Items]
Interest cost on APBO	$ 1	$ 1	$ 3	$ 3
Expected return on plan assets	(1)	(1)	(2)	(3)
Amortization of unrecognized prior service credit			(1)
Net benefit cost	$ 0	$ 0	$ 0	$ 0

Trust Preferred Securities I127

Trust Preferred Securities Issued by Unconsolidated Subsidiaries - Additional Information (Detail) $ in Millions	Sep. 30, 2015USD ($)
Trust Preferred Securities [Abstract]
Percentage of trust preferred securities issued by the KeyCorp of Tier 1 capital	8.00%
Trust preferred securities issued by the KeyCorp of Tier 1 capital	$ 85

Trust Preferred Securities I128

Trust Preferred Securities Issued by Unconsolidated Subsidiaries - Summary of Trust Preferred Securities, Common Stock and Related Debentures (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Stock	$ 1,017	$ 1,017	$ 1,017
KeyCorp Capital I [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	156
Common Stock	6
Principal Amount of Debentures, Net of Discount	$ 162
Interest Rate of Trust Preferred Securities and Debentures	1.024%
Maturity of Trust Preferred Securities and Debentures	2,028
KeyCorp Capital II [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 111
Common Stock	4
Principal Amount of Debentures, Net of Discount	$ 115
Interest Rate of Trust Preferred Securities and Debentures	6.875%
Maturity of Trust Preferred Securities and Debentures	2,029
KeyCorp Capital III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 145
Common Stock	4
Principal Amount of Debentures, Net of Discount	$ 149
Interest Rate of Trust Preferred Securities and Debentures	7.75%
Maturity of Trust Preferred Securities and Debentures	2,029
Business Trusts [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 412	408	397
Common Stock	14	14	14
Principal Amount of Debentures, Net of Discount	$ 426	$ 422	$ 411
Interest Rate of Trust Preferred Securities and Debentures	4.968%	4.926%	4.856%

Trust Preferred Securities I129

Trust Preferred Securities Issued by Unconsolidated Subsidiaries - Summary of Trust Preferred Securities, Common Stock and Related Debentures (Parenthetical) (Detail) - USD ($) $ in Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust preferred securities adjustments related to fair value hedges	$ 72	$ 57	$ 68
Redemption price as the sum of the present values of principal and interest payments, if redeemed before maturity	The greater of: (i) the principal amount, plus any accrued but unpaid interest, or (ii) the sum of the present values of principal and interest payments discounted at the Treasury Rate (as defined in the applicable indenture), plus 20 basis points for KeyCorp Capital II or 25 basis points for KeyCorp Capital III or 50 basis points in the case of redemption upon either a tax or a capital treatment event for either KeyCorp Capital II or KeyCorp Capital III, plus any accrued but unpaid interest.
Debentures adjustments related to financial instrument hedging	$ 72	$ 57	$ 68
KeyCorp Capital I [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Floating interest rate	KeyCorp Capital II and KeyCorp Capital III are fixed. KeyCorp Capital I has a floating interest rate, equal to three-month LIBOR plus 74 basis points, that reprices quarterly.
Floating interest rate equal to three-month LIBOR plus percentage	0.74%

Contingent Liabilities and G130

Contingent Liabilities and Guarantees - Guarantees (Detail) $ in Millions	Sep. 30, 2015USD ($)
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	$ 15,380
Liability Recorded	188
Written Put Options [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	2,131
Liability Recorded	117
Standby Letters of Credit [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	11,498
Liability Recorded	63
Recourse Agreement with FNMA [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	1,747
Liability Recorded	4
Return Guarantee Agreement with LIHTC Investors [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	4
Liability Recorded	$ 4

Contingent Liabilities and G131

Contingent Liabilities and Guarantees - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015USD ($)
Commitments Contingencies And Guarantees [Line Items]
Weighted-average remaining term for outstanding commercial mortgage loans in years	7 years 10 months 6 days
Unpaid principal balance outstanding of loans sold	$ 6,100,000,000
Potential undiscounted future payments maximum limit	One-third of the principal balance of loans outstanding
Default guarantees, value	$ 188,000,000
Written Put Options [Member]
Commitments Contingencies And Guarantees [Line Items]
Default guarantees, value	$ 117,000,000
Weighted average life of written put options	2 years
Return Guarantee Agreement with LIHTC Investors [Member]
Commitments Contingencies And Guarantees [Line Items]
Compliance period of property	15 years
Default guarantees, value	$ 4,000,000
Expiration of guarantees	Extend through 2018
Standby Letters of Credit [Member]
Commitments Contingencies And Guarantees [Line Items]
Remaining weighted-average life of standby letters of credit in years	3 years
Remaining actual life letters of credit in years	From less than one year to as many as 11 years
Default guarantees, value	$ 63,000,000
Default Guarantees [Member]
Commitments Contingencies And Guarantees [Line Items]
Default guarantees, value	$ 0
Minimum [Member] | Low [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee Obligations	0.00%
Minimum [Member] | Moderate [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee Obligations	30.00%
Minimum [Member] | High [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee Obligations	70.00%
Maximum [Member] | Low [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee Obligations	30.00%
Maximum [Member] | Moderate [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee Obligations	70.00%

Accumulated Other Comprehens132

Accumulated Other Comprehensive Income - Changes in AOCI (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (345)	$ (289)	$ (356)	$ (352)
Other comprehensive income before reclassification, net of income taxes	76	(39)	107	40
Amounts reclassified from accumulated other comprehensive income, net of income taxes	(3)	3	(23)	(13)
Total other comprehensive income (loss), net of tax	73	(36)	84	27
Ending balance	(272)	(325)	(272)	(325)
Unrealized Gains (Losses) on Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(6)	(4)	(63)
Other comprehensive income before reclassification, net of income taxes	54	(33)	57	24
Amounts reclassified from accumulated other comprehensive income, net of income taxes			1
Total other comprehensive income (loss), net of tax	54	(33)	58	24
Ending balance	54	(39)	54	(39)
Unrealized Gains (Losses) on Derivative Financial Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	7	(7)	(8)	(11)
Other comprehensive income before reclassification, net of income taxes	65	3	107	25
Amounts reclassified from accumulated other comprehensive income, net of income taxes	(17)	(11)	(44)	(29)
Total other comprehensive income (loss), net of tax	48	(8)	63	(4)
Ending balance	55	(15)	55	(15)
Foreign Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	9	39	22	42
Other comprehensive income before reclassification, net of income taxes	(5)	(9)	(19)	(9)
Amounts reclassified from accumulated other comprehensive income, net of income taxes			1	(3)
Total other comprehensive income (loss), net of tax	(5)	(9)	(18)	(12)
Ending balance	4	30	4	30
Net Pension and Postretirement Benefit Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(361)	(315)	(366)	(320)
Other comprehensive income before reclassification, net of income taxes	(38)		(38)
Amounts reclassified from accumulated other comprehensive income, net of income taxes	14	14	19	19
Total other comprehensive income (loss), net of tax	(24)	14	(19)	19
Ending balance	$ (385)	$ (301)	$ (385)	$ (301)

Accumulated Other Comprehens133

Accumulated Other Comprehensive Income - Reclassifications Out of AOCI (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Corporate services income	$ 57	$ 42	$ 143	$ 125
Income taxes	72	64	230	232
Income (loss) from continuing operations	220	203	686	694
Personnel expense	(426)	(405)	(1,223)	(1,182)
Interest income - Loans	542	531	1,597	1,576
Interest expense - Long term debt	(41)	(33)	(118)	(98)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Securities Available for Sale [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before income taxes			(1)
Income (loss) from continuing operations			(1)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Securities Available for Sale [Member] | Realized Losses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income			(1)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Derivative Financial Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before income taxes	27	18	70	46
Income taxes	10	7	26	17
Income (loss) from continuing operations	17	11	44	29
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Derivative Financial Instruments [Member] | Interest Rate [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income - Loans	28	18	73	49
Interest expense - Long term debt	(1)	(1)	(3)	(3)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Derivative Financial Instruments [Member] | Foreign Exchange [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income		1
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Corporate services income	(1)		(2)	3
Income (loss) from continuing operations before income taxes	(1)		(2)	3
Income taxes	1		1
Income (loss) from continuing operations			(1)	3
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Pension and Postretirement Benefit Costs [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before income taxes	(23)	(24)	(31)	32
Income taxes	(9)	(10)	12	(13)
Income (loss) from continuing operations	(14)	(14)	(19)	(19)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Pension and Postretirement Benefit Costs [Member] | Amortization of Losses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Personnel expense	(4)	(4)	(13)	(12)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Pension and Postretirement Benefit Costs [Member] | Amortization Of Unrecognized Prior Service Cost [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Personnel expense	$ (19)		1
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Pension and Postretirement Benefit Costs [Member] | Settlement Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Personnel expense		$ (20)	$ (19)	$ (20)

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends declared on common shares, per share	$ 0.075	$ 0.065	$ 0.215	$ 0.185
Dividend payable			$ 199,000,000	$ 178,000,000
Series A Preferred Stock [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Dividend payable per share	$ 1.9375		$ 1.9375
Dividend payable	$ 5,600,000
2015 Capital Plan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Repurchase of common stock	725,000,000		$ 725,000,000
Stock repurchase program authorized amount	$ 123,000,000
Cash dividends declared on common shares, per share	$ 0.075
2016 [Member] | 2015 Capital Plan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Proposed increase in cash dividends declared on common shares, per share			$ 0.085

Line of Business Results - Addi

Line of Business Results - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2015IndustryBranch
Nature Of Operations [Abstract]
Number of state branch network | Branch	12
Number of business units	7
Federal income tax rate	35.00%
State income tax rate	2.20%

Line of Business Results - Fina

Line of Business Results - Financial Information of Business Groups (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)Employees	Sep. 30, 2014USD ($)Employees	Sep. 30, 2015USD ($)Employees	Sep. 30, 2014USD ($)Employees
Segment Reporting Information [Line Items]
Net interest income (TE)	$ 591	$ 575	$ 1,746	$ 1,711
Noninterest income	470	417	1,395	1,307
Provision for credit losses			110	52
Other noninterest expense	88	89	258	251
Allocated income taxes and TE adjustments	72	64	230	232
Income (loss) from continuing operations	220	203	686	694
Income (loss) from discontinued operations, net of taxes	(3)	(17)	5	(41)
Net income (loss)	217	186	691	653
Less: Net income (loss) attributable to noncontrolling interests	(2)		1	6
Net income (loss) attributable to Key	219	186	690	647
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net interest income (TE)	595	580	1,759	1,726
Noninterest income	473	422	1,406	1,314
Total revenue (TE)	1,068	1,002	3,165	3,040
Provision for credit losses	44	19	120	36
Depreciation and amortization expense	27	27	79	80
Other noninterest expense	682	647	2,016	1,927
Income (loss) from continuing operations before income taxes (TE)	315	309	950	997
Allocated income taxes and TE adjustments	82	88	261	292
Income (loss) from continuing operations	233	221	689	705
Net income (loss)	233	221	689	705
Less: Net income (loss) attributable to noncontrolling interests	(2)		1	6
Net income (loss) attributable to Key	235	221	688	699
AVERAGE BALANCES
Loans and leases	59,244	55,714	58,200	55,320
Total assets	92,124	86,458	90,706	85,836
Deposits	70,498	68,466	70,291	67,397
OTHER FINANCIAL DATA
Net loan charge-offs	$ 42	$ 31	$ 105	$ 82
Return on average allocated equity	19.00%	18.28%	18.81%	19.66%
Return on average allocated equity	19.00%	18.28%	18.81%	19.66%
Operating Segments [Member] | Weighted Average [Member]
OTHER FINANCIAL DATA
Average full-time equivalent employees | Employees	9,513	9,605	9,503	9,615
Operating Segments [Member] | Key Community Bank [Member]
Segment Reporting Information [Line Items]
Net interest income (TE)	$ 379	$ 359	$ 1,098	$ 1,084
Noninterest income	200	199	589	574
Total revenue (TE)	579	558	1,687	1,658
Provision for credit losses	18	21	50	48
Depreciation and amortization expense	14	16	42	49
Other noninterest expense	434	425	1,297	1,274
Income (loss) from continuing operations before income taxes (TE)	113	96	298	287
Allocated income taxes and TE adjustments	42	36	111	107
Income (loss) from continuing operations	71	60	187	180
Net income (loss)	71	60	187	180
Net income (loss) attributable to Key	71	60	187	180
AVERAGE BALANCES
Loans and leases	31,039	30,103	30,804	29,979
Total assets	33,090	32,173	32,853	32,063
Deposits	51,234	50,303	50,808	50,151
OTHER FINANCIAL DATA
Net loan charge-offs	$ 21	$ 28	$ 69	$ 89
Return on average allocated equity	10.49%	8.89%	9.27%	8.81%
Return on average allocated equity	10.49%	8.89%	9.27%	8.81%
Operating Segments [Member] | Key Community Bank [Member] | Weighted Average [Member]
OTHER FINANCIAL DATA
Average full-time equivalent employees | Employees	7,326	7,573	7,392	7,613
Operating Segments [Member] | Key Corporate Bank [Member]
Segment Reporting Information [Line Items]
Net interest income (TE)	$ 220	$ 215	$ 661	$ 621
Noninterest income	234	185	671	566
Total revenue (TE)	454	400	1,332	1,187
Provision for credit losses	30	2	77	7
Depreciation and amortization expense	11	8	31	22
Other noninterest expense	235	205	681	599
Income (loss) from continuing operations before income taxes (TE)	178	185	543	559
Allocated income taxes and TE adjustments	42	51	143	158
Income (loss) from continuing operations	136	134	400	401
Net income (loss)	136	134	400	401
Less: Net income (loss) attributable to noncontrolling interests	(2)		(1)	2
Net income (loss) attributable to Key	138	134	401	399
AVERAGE BALANCES
Loans and leases	26,425	23,215	25,488	22,702
Total assets	32,163	28,268	31,236	27,829
Deposits	18,809	17,599	19,029	16,655
OTHER FINANCIAL DATA
Net loan charge-offs	$ 20	$ (1)	$ 28	$ (15)
Return on average allocated equity	28.65%	31.59%	28.82%	33.74%
Return on average allocated equity	28.65%	31.59%	28.82%	33.74%
Operating Segments [Member] | Key Corporate Bank [Member] | Weighted Average [Member]
OTHER FINANCIAL DATA
Average full-time equivalent employees | Employees	2,173	1,998	2,096	1,952
Operating Segments [Member] | Other Segments [Member]
Segment Reporting Information [Line Items]
Net interest income (TE)	$ (4)	$ 6		$ 21
Noninterest income	39	38	$ 146	174
Total revenue (TE)	35	44	146	195
Provision for credit losses	(4)	(4)	(7)	(19)
Depreciation and amortization expense	2	3	6	9
Other noninterest expense	13	17	38	54
Income (loss) from continuing operations before income taxes (TE)	24	28	109	151
Allocated income taxes and TE adjustments	(2)	1	7	27
Income (loss) from continuing operations	26	27	102	124
Net income (loss)	26	27	102	124
Less: Net income (loss) attributable to noncontrolling interests			2	4
Net income (loss) attributable to Key	26	27	100	120
AVERAGE BALANCES
Loans and leases	1,780	2,396	1,908	2,639
Total assets	26,871	26,017	26,617	25,944
Deposits	455	564	454	591
OTHER FINANCIAL DATA
Net loan charge-offs	$ 1	$ 4	$ 8	$ 8
Return on average allocated equity	33.27%	24.63%	40.39%	36.38%
Return on average allocated equity	33.27%	24.63%	40.39%	36.38%
Operating Segments [Member] | Other Segments [Member] | Weighted Average [Member]
OTHER FINANCIAL DATA
Average full-time equivalent employees | Employees	14	34	15	50
Segment Reconciling Items [Member]
Segment Reporting Information [Line Items]
Net interest income (TE)	$ 3	$ 1	$ 7	$ 3
Noninterest income	(3)	(5)	(11)	(7)
Total revenue (TE)		(4)	(4)	(4)
Provision for credit losses	1		1	(1)
Depreciation and amortization expense	35	38	112	115
Other noninterest expense	(20)	(6)	(103)	(65)
Income (loss) from continuing operations before income taxes (TE)	(16)	(36)	(14)	(53)
Allocated income taxes and TE adjustments	(3)	(18)	(11)	(42)
Income (loss) from continuing operations	(13)	(18)	(3)	(11)
Income (loss) from discontinued operations, net of taxes	(3)	(17)	5	(41)
Net income (loss)	(16)	(35)	2	(52)
Net income (loss) attributable to Key	(16)	(35)	2	(52)
AVERAGE BALANCES
Loans and leases	37	82	63	68
Total assets	527	665	618	676
Deposits	(29)	$ (130)	$ (62)	(138)
OTHER FINANCIAL DATA
Net loan charge-offs	$ (1)			$ (1)
Return on average allocated equity	(0.90%)	(1.26%)	(0.05%)	(0.26%)
Return on average allocated equity	(1.11%)	(2.45%)	0.07%	(1.22%)
Segment Reconciling Items [Member] | Weighted Average [Member]
OTHER FINANCIAL DATA
Average full-time equivalent employees | Employees	4,042	4,300	4,022	4,327
Operating Segments and Reconciling Items [Member]
Segment Reporting Information [Line Items]
Net interest income (TE)	$ 598	$ 581	$ 1,766	$ 1,729
Noninterest income	470	417	1,395	1,307
Total revenue (TE)	1,068	998	3,161	3,036
Provision for credit losses	45	19	121	35
Depreciation and amortization expense	62	65	191	195
Other noninterest expense	662	641	1,913	1,862
Income (loss) from continuing operations before income taxes (TE)	299	273	936	944
Allocated income taxes and TE adjustments	79	70	250	250
Income (loss) from continuing operations	220	203	686	694
Income (loss) from discontinued operations, net of taxes	(3)	(17)	5	(41)
Net income (loss)	217	186	691	653
Less: Net income (loss) attributable to noncontrolling interests	(2)		1	6
Net income (loss) attributable to Key	219	186	690	647
AVERAGE BALANCES
Loans and leases	59,281	55,796	58,263	55,388
Total assets	92,651	87,123	91,324	86,512
Deposits	70,469	68,336	70,229	67,259
OTHER FINANCIAL DATA
Net loan charge-offs	$ 41	$ 31	$ 105	$ 81
Return on average allocated equity	8.30%	7.69%	6.48%	6.59%
Return on average allocated equity	8.19%	7.05%	6.52%	6.20%
Operating Segments and Reconciling Items [Member] | Weighted Average [Member]
OTHER FINANCIAL DATA
Average full-time equivalent employees | Employees	13,555	13,905	13,525	13,942

Subsequent Event - Additional I

Subsequent Event - Additional Information (Detail) $ / shares in Units, $ in Millions	Oct. 30, 2015USD ($)$ / sharesshares	Sep. 30, 2015USD ($)Branches	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)
Subsequent Event [Line Items]
Total assets		$ 95,422	$ 93,821	$ 89,784
Total deposits		$ 71,073	$ 71,998	$ 68,456
First Niagara Financial Group, Inc. [Member]
Subsequent Event [Line Items]
Number of branches | Branches		394
Total assets		$ 39,000
Total deposits		$ 29,000
Subsequent Event [Member]
Subsequent Event [Line Items]
Closing price of common shares | $ / shares	$ 13.38
Subsequent Event [Member] | First Niagara Financial Group, Inc. [Member]
Subsequent Event [Line Items]
Acquiree shares equivalent of acquirer common stock | shares	0.680
Cash payable per acquiree common stock | $ / shares	$ 2.30
Acquiree common stock shares outstanding fully diluted | shares	356,272,000
Total consideration to be paid	$ 4,100