KeyCorp (KEY) 10-Q 3 May 19 2019 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2019	May 01, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	KEYCORP /NEW/
Trading Symbol	KEY
Entity Central Index Key	0000091576
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		1,008,288,522

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions		Mar. 31, 2019	Dec. 31, 2018
ASSETS
Cash and due from banks		$ 611	$ 678
Short-term investments		2,511	2,562
Trading account assets		979	849
Securities available for sale		20,854	19,428
Held-to-maturity securities (fair value: $10,997 and $11,122)		11,234	11,519
Other investments		646	666
Loans, net of unearned income of $328 and $678		90,178	89,552
Less: Allowance for loan and lease losses		(883)	(883)
Net loans		89,295	88,669
Loans held for sale	[1]	894	1,227
Premises and equipment		849	882
Goodwill		2,516	2,516
Other intangible assets		300	316
Corporate-owned life insurance		4,184	4,171
Accrued income and other assets		5,596	5,030
Discontinued assets		1,046	1,100
Total assets		141,515	139,613
Deposits in domestic offices:
NOW and money market deposit accounts		61,380	59,918
Savings deposits		4,839	4,854
Certificates of deposit ($100,000 or more)		8,396	7,913
Other time deposits		5,573	5,332
Total interest-bearing deposits		80,188	78,017
Noninterest-bearing deposits		27,987	29,292
Total deposits		108,175	107,309
Federal funds purchased and securities sold under repurchase agreements		266	319
Bank notes and other short-term borrowings		679	544
Accrued expense and other liabilities		2,301	2,113
Long-term debt		14,168	13,732
Total liabilities		125,589	124,017
EQUITY
Preferred stock		1,450	1,450
Common Shares, $1 par value; authorized 1,400,000,000 shares; issued 1,256,702,081, and 1,256,702,081 shares		1,257	1,257
Capital surplus		6,259	6,331
Retained earnings		11,771	11,556
Treasury stock, at cost (243,516,534 and 237,198,944 shares)		(4,283)	(4,181)
Accumulated other comprehensive income (loss)		(530)	(818)
Key shareholders’ equity		15,924	15,595
Noncontrolling interests		2	1
Total equity		15,926	15,596
Total liabilities and equity		$ 141,515	$ 139,613
[1]	Total loans held for sale include real estate — residential mortgage loans held for sale at fair value of $71 million at March 31, 2019 , and $54 million at December 31, 2018

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Held-to-maturity securities, fair value	$ 10,997,000,000	$ 11,122,000,000
Unearned income on loans	328,000,000	678,000,000
Loans held for sale		0
Aggregate amount of certificates of deposit, denominations	$ 100,000,000,000	$ 100,000,000,000
Common shares, par value (in usd per share)	$ 1	$ 1
Common shares, shares authorized (in shares)	1,400,000,000	1,400,000,000
Common shares, shares issued (in shares)	1,256,702,081	1,256,702,081
Treasury stock, shares (in shares)	243,516,534	237,198,944
Residential Mortgage [Member]
Loans held for sale	$ 71,000,000	$ 54,000,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
INTEREST INCOME
Loans		$ 1,066	$ 940
Loans held for sale		13	12
Securities available for sale		129	95
Held-to-maturity securities		68	69
Trading account assets		8	7
Short-term investments		16	8
Other investments		4	6
Total interest income		1,304	1,137
INTEREST EXPENSE
Deposits		202	91
Federal funds purchased and securities sold under repurchase agreements		1	4
Bank notes and other short-term borrowings		4	6
Long-term debt		120	92
Total interest expense		327	193
NET INTEREST INCOME		977	944
Provision for credit losses		62	61
Net interest income after provision for credit losses		915	883
NONINTEREST INCOME
Trust and investment services income		115	133
Investment banking and debt placement fees		110	143
Service charges on deposit accounts		82	89
Operating lease income and other leasing gains		37	32
Corporate services income		55	62
Cards and payments income		66	62
Corporate-owned life insurance income		32	32
Consumer mortgage income		8	7
Mortgage servicing fees		21	20
Other income	[1]	10	21
Total noninterest income		536	601
NONINTEREST EXPENSE
Personnel		563	594
Net occupancy		72	78
Computer processing		54	52
Business services and professional fees		44	41
Equipment		24	26
Operating lease expense		26	27
Marketing		19	25
FDIC assessment		7	21
Intangible asset amortization		22	29
OREO expense, net		3	2
Other expense		129	111
Total noninterest expense		963	1,006
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		488	478
Income taxes		82	62
INCOME (LOSS) FROM CONTINUING OPERATIONS		406	416
Income (loss) from discontinued operations		1	2
NET INCOME (LOSS)		407	418
Less: Net income (loss) attributable to noncontrolling interests		0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY		407	418
Income (loss) from continuing operations attributable to Key common shareholders		386	402
Net income (loss) attributable to Key common shareholders		$ 387	$ 404
Per Common Share:
Income (loss) from continuing operations attributable to Key common shareholders (in usd per share)		$ 0.38	$ 0.38
Income (loss) from discontinued operations, net of taxes (in usd per share)		0	0
Net income (loss) attributable to Key common shareholders (in usd per share)	[2]	0.38	0.38
Per Common Share — assuming dilution:
Income (loss) from continuing operations attributable to Key common shareholders (in usd per share)		0.38	0.38
Income (loss) from discontinued operations, net of taxes (in usd per share)		0	0
Net income (loss) attributable to Key common shareholders (in usd per share)	[2]	0.38	0.38
Cash dividends declared per common share (in usd per share)		$ 0.17	$ 0.105
Weighted-average common shares outstanding (000) (in shares)		1,006,717	1,056,037
Effect of common share options and other stock awards (in shares)		9,787	15,749
Weighted-average common shares and potential common shares outstanding (in shares)	[3]	1,016,504	1,071,786
[1]	For the three months ended March 31, 2019 , and March 31, 2018 , net securities gains totaled less than $1 million. For the three months ended March 31, 2019 , and March 31, 2018
[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 In_2

Consolidated Statements of Income (Parenthetical) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net securities gains (less than $1 million))	$ 1,000,000	$ 1,000,000
Impaired losses related to securities	$ 0	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 407	$ 418
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale, net of income taxes of $56 and ($47)	184	(150)
Net unrealized gains (losses) on derivative financial instruments, net of income taxes of $31 and ($20)	99	(63)
Foreign currency translation adjustments, net of income taxes of $0 and $0	3	(2)
Net pension and postretirement benefit costs, net of income taxes of $1 and $1	2	3
Total other comprehensive income (loss), net of tax	288	(212)
Comprehensive income (loss)	695	206
Less: Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income (loss) attributable to Key	$ 695	$ 206

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Income taxes effect on net unrealized (losses) gains on securities available for sale	$ 56	$ (47)
Income taxes effect on net unrealized gains (losses) on derivative financial instruments	31	(20)
Income taxes effect on foreign currency translation adjustments	0	0
Income taxes effect on net pension and postretirement benefit costs	$ 1	$ 1

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) $ in Millions		Total	Series D Preferred Stock [Member]	Series E Preferred Stock [Member]	Series F Preferred Stock [Member]	Preferred Stock [Member]	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Retained Earnings [Member]Series D Preferred Stock [Member]	Retained Earnings [Member]Series E Preferred Stock [Member]	Retained Earnings [Member]Series F Preferred Stock [Member]	Treasury Stock, at Cost [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance						$ 1,025	$ 1,257	$ 6,335	$ 10,335				$ (3,150)	$ (779)	$ 2
Cumulative effect from changes in accounting principle	[1]								(2)
Beginning Balance, Preferred Shares (in shares) at Dec. 31, 2017						521,000
Beginning Balance, Common Shares (in shares) at Dec. 31, 2017							1,069,084,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance						$ 1,025	$ 1,257	6,289	10,624				(3,260)	(991)	2
Net income (loss)		$ 418							418						0
Other comprehensive income (loss)		(212)												(212)
Deferred compensation								6
Cash dividends declared on common shares									(112)
Cash dividends declared on preferred stock										$ (7)	$ (8)
Open market common share repurchases (in shares)							(7,333,000)
Open market Common Share repurchases													(156)
Employee equity compensation program Common Share repurchases (in shares)							(2,066,000)
Employee equity compensation program Common Share repurchases													(43)
Common shares reissued (returned) for stock options and other employee benefit plans, shares							5,254,000
Common Shares reissued (returned) for stock options and other employee benefit plans								(52)					89
Ending Balance, Preferred Shares (in shares) at Mar. 31, 2018						521,000
Ending Balance, Common Shares (in shares) at Mar. 31, 2018							1,064,939,000
Ending Balance at Mar. 31, 2018						$ 1,025	$ 1,257	6,289	10,624				(3,260)	(991)	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance						1,025	1,257	6,289	10,624				(3,260)	(991)	2
Beginning Balance		15,596				$ 1,450	$ 1,257	6,331	11,556				(4,181)	(818)	1
Beginning Balance, Preferred Shares (in shares) at Dec. 31, 2018						946,000
Beginning Balance, Common Shares (in shares) at Dec. 31, 2018							1,019,503,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		15,926				$ 1,450	$ 1,257	6,259	11,771				(4,283)	(530)	2
Net income (loss)		407							407						0
Other comprehensive income (loss)		288												288
Deferred compensation								(3)
Cash dividends declared on common shares									(172)
Cash dividends declared on preferred stock										$ (6)	$ (8)	$ (6)
Open market common share repurchases (in shares)							(9,968,000)
Open market Common Share repurchases													(167)
Employee equity compensation program Common Share repurchases (in shares)							(1,823,000)
Employee equity compensation program Common Share repurchases								(2)					(32)
Common shares reissued (returned) for stock options and other employee benefit plans, shares							5,474,000
Common Shares reissued (returned) for stock options and other employee benefit plans								(67)					97
Net contribution from (distribution to) noncontrolling interests															1
Ending Balance, Preferred Shares (in shares) at Mar. 31, 2019			21,000	500,000	425,000	946,000
Ending Balance, Common Shares (in shares) at Mar. 31, 2019							1,013,186,000
Ending Balance at Mar. 31, 2019		15,926				$ 1,450	$ 1,257	6,259	11,771				(4,283)	(530)	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance		$ 15,926				$ 1,450	$ 1,257	$ 6,259	$ 11,771				$ (4,283)	$ (530)	$ 2
[1]	Includes the impact of implementing ASU 2014-09, ASU 2016-01, and ASU 2017-12.

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash dividends declared on common shares (in usd per share)	$ 0.17	$ 0.105
Series D Preferred Stock [Member]
Cash dividends declared on Preferred Stock (in usd per share)	12.50	12.50
Series E Preferred Stock [Member]
Cash dividends declared on Preferred Stock (in usd per share)	0.382813	$ 0.382813
Series F Preferred Stock [Member]
Cash dividends declared on Preferred Stock (in usd per share)	$ 0.353125

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
OPERATING ACTIVITIES
Net income (loss)	$ 407	$ 418
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Provision for credit losses	62	61
Depreciation and amortization expense, net	58	103
Accretion of acquired loans	17	27
Increase in cash surrender value of corporate-owned life insurance	(28)	(28)
Stock-based compensation expense	25	27
FDIC reimbursement (payments), net of FDIC expense	0	1
Deferred income taxes (benefit)	99	22
Proceeds from sales of loans held for sale	2,045	2,748
Originations of loans held for sale, net of repayments	(1,679)	(3,280)
Net losses (gains) on sales of loans held for sale	(28)	(44)
Net losses (gains) and writedown on OREO	1	0
Net losses (gains) on leased equipment	2	3
Net losses (gains) on sales of fixed assets	(1)	0
Net decrease (increase) in trading account assets	(130)	67
Other operating activities, net	(294)	(336)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	556	(211)
INVESTING ACTIVITIES
Net decrease (increase) in short-term investments, excluding acquisitions	51	2,803
Purchases of securities available for sale	(1,842)	(787)
Proceeds from prepayments and maturities of securities available for sale	655	833
Proceeds from prepayments and maturities of held-to-maturity securities	295	398
Purchases of held-to-maturity securities	(9)	(756)
Purchases of other investments	(16)	(4)
Proceeds from sales of other investments	7	10
Proceeds from prepayments and maturities of other investments	32	0
Net decrease (increase) in loans, excluding acquisitions, sales and transfers	(780)	(1,793)
Proceeds from sales of portfolio loans	61	38
Proceeds from corporate-owned life insurance	16	18
Purchases of premises, equipment, and software	(9)	(19)
Proceeds from sales of premises and equipment	1	1
Proceeds from sales of OREO	4	7
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(1,534)	749
FINANCING ACTIVITIES
Net increase (decrease) in deposits, excluding acquisitions	866	(484)
Net increase (decrease) in short-term borrowings	82	738
Net proceeds from issuance of long-term debt	1,351	501
Payments on long-term debt	(1,000)	(1,005)
Open market Common Share repurchases	(167)	(156)
Employee equity compensation program Common Share repurchases	(32)	(43)
Net proceeds from reissuance of Common Shares	3	10
Cash dividends paid	(192)	(127)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	911	(566)
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	(67)	(28)
CASH AND DUE FROM BANKS AT BEGINNING OF PERIOD	678	671
CASH AND DUE FROM BANKS AT END OF PERIOD	611	643
Additional disclosures relative to cash flows:
Interest paid	305	199
Income taxes paid (refunded)	34	9
Noncash items:
Reduction of secured borrowing and related collateral	1	7
Loans transferred to portfolio from held for sale	5	14
Loans transferred to held for sale from portfolio	(10)	0
Loans transferred to OREO	9	4
CMBS risk retentions	$ 9	$ 0

Basis of Presentation and Accou

Basis of Presentation and Accounting Policies	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Accounting Policies	1. Basis of Presentation and Accounting Policies 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 affect 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 10 (“ 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% are carried at the cost measurement alternative or at fair value. 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 2018 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. Accounting Guidance Adopted in 2019 Standard Date of Adoption Description Effect on Financial Statements or Other Significant Matters ASU 2016-02, Leases (Topic 842) ASU 2018-01, Leases (Topic 842): Land Easement Practical Expedient ASU 2018-10, Codification Improvements to Topic 842 ASU 2018-11, Leases (Topic 842): Targeted Improvements ASU 2018-20, Leases (Topic 842): Narrow Scope Improvements for Lessors ASU 2019-01, Codification Improvements to Topic 842 January 1, 2019 The ASUs create and amend ASC Topic 842, Leases , and supersede Topic 840, Leases. The new guidance requires that a lessee recognize assets and liabilities for leases with lease terms of more than 12 months. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. Leveraged leases that commenced before the effective date of the new guidance are grandfathered. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee primarily will depend on its classification as a finance or operating lease. However, both types of leases are required to be recognized on the balance sheet. ASC 842 requires enhanced disclosures to better understand the amount, timing, and uncertainty of cash flows arising from leases. Qualitative and quantitative disclosures are required to provide additional information about the amounts recorded in the financial statements. Although substantially unchanged, certain amendments provide clarifications related to lessor accounting. The guidance should be implemented using a modified retrospective approach. However, entities may choose to measure and present the changes at the beginning of the earliest period presented or to reflect the changes as of the adoption date. Key adopted this guidance on January 1, 2019, using the package of practical expedients, which allowed Key to maintain historic lease identification and classification, and permitted Key not to reassess initial direct costs under the new guidance. Key also elected the practical expedient on not separating lease components from nonlease components for all of its leases. Adoption resulted in an increase in right-of-use assets and associated lease liabilities arising from operating leases in which Key is the lessee of approximately $710 million on our Consolidated Balance Sheets at January 1, 2019. Right of use assets, lease liabilities, and other changes as a result of adoption are not reflected in comparable periods presented prior to that date. The adoption of this guidance did not have a material impact on the recognition of operating lease expense in our Consolidated Statements of Income. The amount of the right-of-use assets and associated lease liabilities recorded at adoption was based on the present value of unpaid future minimum lease payments. These payments were discounted using Key’s incremental borrowing rate, consistent with what Key would pay to borrow on a collateralized basis over a term similar to each lease. For more information, please see Note 9 (“Leases”). ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities January 1, 2019 The ASU amends ASC Topic 310-20, Receivables — Nonrefundable Fees and Other Costs , and shortens the amortization period to the earliest call date for certain callable debt securities held at a premium. Securities held at a discount will continue to be amortized to maturity. The guidance should be implemented on a modified retrospective basis using a cumulative-effect adjustment. The adoption of this guidance did not have a material effect on our financial condition or results of operations. ASU 2018-07, Stock Compensation - Improvements to Nonemployee Share-Based Payment Accounting January 1, 2019 The ASU amends ASC Topic 718, Stock Compensation , and simplifies the accounting for share based payments granted to nonemployees for goods and services. The guidance should be implemented on a modified retrospective basis using a cumulative-effect adjustment. The adoption of this guidance did not affect our financial condition or results of operations. ASU 2018-13, Fair Value Measurement: Disclosure Framework September 30, 2018 (removed disclosures only); January 1, 2019, remaining requirements An entity is permitted to early adopt any removed or modified disclosures upon issuance of this ASU and delay adoption of the additional disclosures until their effective date. The ASU amends disclosure requirements related to fair value measurements. Specifically, entities are no longer required to disclose transfers between Level 1 and Level 2 of the fair value hierarchy, or qualitatively disclose the valuation process for Level 3 fair value measurements. The updated guidance requires disclosure of the changes in unrealized gains and losses for the period included in Other Comprehensive Income for recurring Level 3 fair value measurements. Entities also will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. Key removed the disclosures no longer required by the guidance as of September 30, 2018, and early adopted the additional provisions of the standard in the first quarter of 2019. The adoption of this standard did not result in significant changes to Key’s disclosures, and there was no effect to our financial condition or results of operations. Standard Date of Adoption Description Effect on Financial Statements or Other Significant Matters ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract January 1, 2019 Early adoption. The ASU amends ASC Topic 350-40 to align the accounting for costs incurred in a cloud computing arrangement with the guidance on developing internal use software. Specifically, if a cloud computing arrangement is deemed to be a service contract, certain implementation costs are eligible for capitalization. The new guidance prescribes the balance sheet and income statement presentation and cash flow classification for the capitalized costs and related amortization expense. It also requires additional quantitative and qualitative disclosures. The guidance may be adopted prospectively or retrospectively. Key early adopted this guidance effective January 1, 2019, on a prospective basis. The adoption of this guidance did not have a material effect on our financial condition or results of operations.

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2019
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 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. Our basic and diluted earnings per Common Share are calculated as follows: Three months ended March 31, dollars in millions, except per share amounts 2019 2018 EARNINGS Income (loss) from continuing operations $ 406 $ 416 Less: Net income (loss) attributable to noncontrolling interests — — Income (loss) from continuing operations attributable to Key 406 416 Less: Dividends on Preferred Stock 20 14 Income (loss) from continuing operations attributable to Key common shareholders 386 402 Income (loss) from discontinued operations, net of taxes 1 2 Net income (loss) attributable to Key common shareholders $ 387 $ 404 WEIGHTED-AVERAGE COMMON SHARES Weighted-average Common Shares outstanding (000) 1,006,717 1,056,037 Effect of Common Share options and other stock awards 9,787 15,749 Weighted-average Common Shares and potential Common Shares outstanding (000) (a) 1,016,504 1,071,786 EARNINGS PER COMMON SHARE Income (loss) from continuing operations attributable to Key common shareholders $ .38 $ .38 Income (loss) from discontinued operations, net of taxes — — Net income (loss) attributable to Key common shareholders (b) .38 .38 Income (loss) from continuing operations attributable to Key common shareholders — assuming dilution $ .38 $ .38 Income (loss) from discontinued operations, net of taxes — assuming dilution — — Net income (loss) attributable to Key common shareholders — assuming dilution (b) .38 .38 (a) Assumes conversion of Common Share options and other stock awards and/or convertible preferred stock, as applicable. (b)

Loan Portfolio

Loan Portfolio	3 Months Ended
	Mar. 31, 2019
Loans Receivables [Abstract]
Loan Portfolio	3. Loan Portfolio in millions March 31, 2019 December 31, 2018 Commercial and industrial (a) $ 46,474 $ 45,753 Commercial real estate: Commercial mortgage 14,344 14,285 Construction 1,420 1,666 Total commercial real estate loans 15,764 15,951 Commercial lease financing (b) 4,507 4,606 Total commercial loans 66,745 66,310 Residential — prime loans: Real estate — residential mortgage 5,615 5,513 Home equity loans 10,846 11,142 Total residential — prime loans 16,461 16,655 Consumer direct loans 2,165 1,809 Credit cards 1,086 1,144 Consumer indirect loans 3,721 3,634 Total consumer loans 23,433 23,242 Total loans (c) $ 90,178 $ 89,552 (a) Loan balances include $135 million and $132 million of commercial credit card balances at March 31, 2019 , and December 31, 2018 , respectively. (b) Commercial lease financing includes receivables held as collateral for a secured borrowing of $12 million and $10 million at March 31, 2019 , and December 31, 2018 , 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 19 (“ Long-Term Debt ”) beginning on page 160 of our 2018 Form 10-K. (c) Total loans exclude loans of $1.0 billion at March 31, 2019 , and $1.1 billion at December 31, 2018

Asset Quality

Asset Quality	3 Months Ended
	Mar. 31, 2019
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, delinquencies, and credit quality ratings as defined by management. Credit Quality Indicators 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 refreshed FICO score assigned for the consumer loan portfolios. Additional information pertaining to loan grading and scoring is included in Note 5 (“ Asset Quality ”) on page 165 of our 2018 Form 10-K. Commercial Credit Exposure — Excluding PCI Credit Risk Profile by Creditworthiness Category (a), (b) Commercial and industrial RE — Commercial RE — Construction Commercial lease Total in millions March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, RATING 2019 2018 2019 2018 2019 2018 2019 2018 2019 2018 Pass $ 44,691 $ 44,138 $ 13,734 $ 13,672 $ 1,362 $ 1,537 $ 4,466 $ 4,557 $ 64,253 $ 63,904 Criticized (Accruing) 1,555 1,402 355 354 55 125 32 41 1,997 1,922 Criticized (Nonaccruing) 170 152 83 81 2 2 9 8 264 243 Total $ 46,416 $ 45,692 $ 14,172 $ 14,107 $ 1,419 $ 1,664 $ 4,507 $ 4,606 $ 66,514 $ 66,069 (a) Credit quality indicators are updated on an ongoing basis and reflect credit quality information as of the dates indicated. (b) The term criticized refers to those loans that are internally classified by Key as special mention or worse, which are asset quality categories defined by regulatory authorities. These assets have an elevated level of risk and may have a high probability of default or total loss. Pass rated refers to all loans not classified as criticized. Consumer Credit Exposure — Excluding PCI Non-PCI Loans by Refreshed FICO Score (a) Residential — Prime Consumer direct loans Credit cards Consumer indirect loans Total in millions March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, FICO SCORE 2019 2018 2019 2018 2019 2018 2019 2018 2019 2018 750 and above $ 9,818 $ 9,794 $ 548 $ 549 $ 477 $ 521 $ 1,679 $ 1,647 $ 12,522 $ 12,511 660 to 749 4,690 4,906 683 700 485 507 1,354 1,320 7,212 7,433 Less than 660 1,394 1,411 217 224 124 116 556 565 2,291 2,316 No Score 242 213 714 333 — — 132 102 1,088 648 Total $ 16,144 $ 16,324 $ 2,162 $ 1,806 $ 1,086 $ 1,144 $ 3,721 $ 3,634 $ 23,113 $ 22,908 (a) Borrower FICO scores provide information about the credit quality of our consumer loan portfolio as they provide an indication as to the likelihood that a debtor will repay its debts. The scores are obtained from a nationally recognized consumer rating agency and are presented in the above table at the dates indicated. Commercial Credit Exposure — PCI Credit Risk Profile by Creditworthiness Category (a), (b) Commercial and Industrial RE — Commercial RE — Construction Commercial Lease Total in millions March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, RATING 2019 2018 2019 2018 2019 2018 2019 2018 2019 2018 Pass $ 36 $ 37 $ 125 $ 125 $ 1 $ 2 — — $ 162 $ 164 Criticized 22 24 47 53 — — — — 69 77 Total $ 58 $ 61 $ 172 $ 178 $ 1 $ 2 — — $ 231 $ 241 (a) Credit quality indicators are updated on an ongoing basis and reflect credit quality information as of the dates indicated. (b) The term “criticized” refers to those loans that are internally classified by Key as special mention or worse, which are asset quality categories defined by regulatory authorities. These assets have an elevated level of risk and may have a high probability of default or total loss. Pass rated refers to all loans not classified as criticized. Consumer Credit Exposure — PCI PCI Loans by Refreshed FICO Score (a) Residential — Prime Consumer direct loans Credit cards Consumer indirect loans Total in millions March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, FICO SCORE 2019 2018 2019 2018 2019 2018 2019 2018 2019 2018 750 and above $ 126 $ 137 — — — — — — $ 126 $ 137 660 to 749 95 95 $ 1 $ 1 — — — — 96 96 Less than 660 90 97 2 2 — — — — 92 99 No Score 6 2 — — — — — — 6 2 Total $ 317 $ 331 $ 3 $ 3 — — — — $ 320 $ 334 (a) Borrower FICO scores provide information about the credit quality of our consumer loan portfolio as they provide an indication as to the likelihood that a debtor will repay its debts. The scores are obtained from a nationally recognized consumer rating agency and are presented in the above table at the dates indicated. Nonperforming and Past Due Loans 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 100 of our 2018 Form 10-K. The following aging analysis of past due and current loans as of March 31, 2019 , and December 31, 2018 , provides further information regarding Key’s credit exposure. Aging Analysis of Loan Portfolio (a) March 31, 2019 Current 30-59 Days Past Due (b) 60-89 Days Past Due (b) 90 and Greater Days Past Due (b) Non-performing Loans Total Past Due and Non-performing Loans Purchased Credit Impaired Total Loans (c), (d) in millions LOAN TYPE Commercial and industrial $ 46,063 $ 79 $ 47 $ 57 $ 170 $ 353 $ 58 $ 46,474 Commercial real estate: Commercial mortgage 14,056 10 7 17 82 116 172 14,344 Construction 1,404 6 — 7 2 15 1 1,420 Total commercial real estate loans 15,460 16 7 24 84 131 173 15,764 Commercial lease financing 4,463 18 12 5 9 44 — 4,507 Total commercial loans $ 65,986 $ 113 $ 66 $ 86 $ 263 $ 528 $ 231 $ 66,745 Real estate — residential mortgage $ 5,234 $ 9 $ 4 $ 3 $ 64 $ 80 $ 301 $ 5,615 Home equity loans 10,583 31 12 9 195 247 16 10,846 Consumer direct loans 2,141 7 4 7 3 21 3 2,165 Credit cards 1,061 7 4 11 3 25 — 1,086 Consumer indirect loans 3,666 26 7 2 20 55 — 3,721 Total consumer loans $ 22,685 $ 80 $ 31 $ 32 $ 285 $ 428 $ 320 $ 23,433 Total loans $ 88,671 $ 193 $ 97 $ 118 $ 548 $ 956 $ 551 $ 90,178 (a) Amounts in table represent recorded investment and exclude loans held for sale. 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. (b) Past due loan amounts exclude PCI, even if contractually past due (or if we do not expect to collect principal or interest in full based on the original contractual terms), as we are currently accreting income over the remaining term of the loans. (c) Net of unearned income, net deferred loan fees and costs, and unamortized discounts and premiums. (d) Future accretable yield related to PCI loans is not included in the analysis of the loan portfolio. December 31, 2018 Current 30-59 Days Past Due (b) 60-89 Days Past Due (b) 90 and Greater Days Past Due (b) Non-performing Loans Total Past Due and Non-performing Loans Purchased Credit Impaired Total Loans (c), (d) in millions LOAN TYPE Commercial and industrial $ 45,375 $ 89 $ 31 $ 45 $ 152 $ 317 61 $ 45,753 Commercial real estate: Commercial mortgage 13,957 27 17 25 81 150 178 14,285 Construction 1,646 — 13 3 2 18 2 1,666 Total commercial real estate loans 15,603 27 30 28 83 168 180 15,951 Commercial lease financing 4,580 12 1 4 9 26 — 4,606 Total commercial loans $ 65,558 $ 128 $ 62 $ 77 $ 244 $ 511 241 $ 66,310 Real estate — residential mortgage $ 5,119 $ 11 $ 3 $ 4 $ 62 $ 80 $ 314 $ 5,513 Home equity loans 10,862 31 12 10 210 263 17 11,142 Consumer direct loans 1,780 11 5 6 4 26 3 1,809 Credit cards 1,119 6 5 12 2 25 — 1,144 Consumer indirect loans 3,573 31 7 3 20 61 — 3,634 Total consumer loans $ 22,453 $ 90 $ 32 $ 35 $ 298 $ 455 $ 334 $ 23,242 Total loans $ 88,011 $ 218 $ 94 $ 112 $ 542 $ 966 $ 575 $ 89,552 (a) Amounts in table represent recorded investment and exclude loans held for sale. 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. (b) Past due loan amounts exclude PCI, even if contractually past due (or if we do not expect to collect principal or interest in full based on the original contractual terms), as we are currently accreting income over the remaining term of the loans. (c) Net of unearned income, net deferred loan fees and costs, and unamortized discounts and premiums. (d) Future accretable yield related to purchased credit impaired loans is not included in the analysis of the loan portfolio. At March 31, 2019 , the approximate carrying amount of our commercial nonperforming loans outstanding represented 79% of their original contractual amount owed, total nonperforming loans outstanding represented 82% of their original contractual amount owed, and nonperforming assets in total were carried at 86% of their original contractual amount owed. Nonperforming loans and loans held for sale reduced expected interest income by $8 million for the three months ended March 31, 2019 , and $7 million for the three months ended March 31, 2018 . The following tables set forth a further breakdown of individually impaired loans as of March 31, 2019 , and December 31, 2018 : March 31, 2019 December 31, 2018 Recorded Investment (a) Unpaid Principal Balance (b) Specific Allowance Recorded Investment (a) Unpaid Principal Balance (b) Specific Allowance in millions With no related allowance recorded: Commercial and industrial $ 152 $ 184 — $ 118 $ 175 — Commercial real estate: Commercial mortgage 59 70 — 64 70 — Total commercial real estate loans 59 70 — 64 70 — Total commercial loans 211 254 — 182 245 — Real estate — residential mortgage 4 5 — 4 5 — Home equity loans 47 54 — 49 56 — Consumer direct loans — 1 — 1 1 — Consumer indirect loans 2 4 — 2 4 — Total consumer loans 53 64 — 56 66 — Total loans with no related allowance recorded 264 318 — 238 311 — With an allowance recorded: Commercial and industrial 17 30 $ 2 44 47 $ 5 Commercial real estate: Commercial mortgage 2 3 — 2 3 1 Total commercial real estate loans 2 3 — 2 3 1 Total commercial loans 19 33 2 46 50 6 Real estate — residential mortgage 43 68 3 45 70 3 Home equity loans 81 87 8 78 85 8 Consumer direct loans 4 4 — 3 3 — Credit cards 3 3 — 3 3 — Consumer indirect loans 35 35 3 34 34 2 Total consumer loans 166 197 14 163 195 13 Total loans with an allowance recorded 185 230 16 209 245 19 Total $ 449 $ 548 $ 16 $ 447 $ 556 $ 19 (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. The following table sets forth a further breakdown of the average individually impaired loans reported by Key: Average Recorded Investment (a) Three Months Ended March 31, in millions 2019 2018 Commercial and industrial $ 165 $ 153 Commercial real estate: Commercial mortgage 64 12 Total commercial real estate loans 64 12 Total commercial loans 229 165 Real estate — residential mortgage 48 49 Home equity loans 128 120 Consumer direct loans 4 4 Credit cards 3 3 Consumer indirect loans 36 35 Total consumer loans 219 211 Total $ 448 $ 376 (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. For the three months ended March 31, 2019 , and March 31, 2018 , interest income recognized on the outstanding balances of accruing impaired loans totaled $3 million and $2 million , respectively. TDRs 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. Additional information pertaining to TDRs is included in Note 5 (“ Asset Quality ”) on page 117 of our 2018 Form 10-K. 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. Commitments outstanding to lend additional funds to borrowers whose loan terms have been modified in TDRs were $4 million and $5 million at March 31, 2019 , and December 31, 2018 , respectively. At March 31, 2019 , and December 31, 2018 , the recorded investment of consumer residential mortgage loans in the process of foreclosure was approximately $96 million and $113 million , respectively. At March 31, 2019 , and December 31, 2018 , we had $40 million and $35 million , respectively, of OREO which included the carrying value of foreclosed residential real estate of approximately $39 million and $35 million , respectively. The following table shows the post-modification outstanding recorded investment by concession type for our commercial and consumer accruing and nonaccruing TDRs that occurred during the periods indicated: Three Months Ended March 31, in millions 2019 2018 Commercial loans: Extension of Maturity Date — $ 1 Total — $ 1 Consumer loans: Interest rate reduction $ 4 $ 8 Other 9 12 Total $ 13 $ 20 Total commercial and consumer TDRs $ 13 $ 21 The following table summarizes the change in the post-modification outstanding recorded investment of our accruing and nonaccruing TDRs during the periods indicated: Three Months Ended March 31, in millions 2019 2018 Balance at beginning of the period $ 399 $ 317 Additions 14 21 Payments (39 ) (19 ) Charge-offs (9 ) (2 ) Balance at end of period $ 365 $ 317 A further breakdown of TDRs included in nonperforming loans by loan category for the periods indicated are as follows: March 31, 2019 December 31, 2018 Number of Loans Pre-modification Outstanding Recorded Investment Post-modification Outstanding Recorded Investment Number of Loans Pre-modification Outstanding Recorded Investment Post-modification Outstanding Recorded Investment dollars in millions LOAN TYPE Nonperforming: Commercial and industrial 27 $ 89 $ 57 35 $ 121 $ 85 Commercial real estate: Commercial mortgage 7 66 58 6 66 62 Total commercial real estate loans 7 66 58 6 66 62 Total commercial loans 34 155 115 41 187 147 Real estate — residential mortgage 284 20 18 281 21 20 Home equity loans 884 52 49 1,142 66 63 Consumer direct loans 120 2 1 171 2 1 Credit cards 225 1 1 330 2 2 Consumer indirect loans 974 16 14 1,098 18 14 Total consumer loans 2,487 91 83 3,022 109 100 Total nonperforming TDRs 2,521 246 198 3,063 296 247 Prior-year accruing: (a) Commercial and industrial 9 38 31 11 37 32 Commercial real estate Commercial mortgage 1 — — 2 — — Total commercial real estate loans 1 — — 2 — — Total commercial loans 10 38 31 13 37 32 Real estate — residential mortgage 481 35 30 491 36 30 Home equity loans 1,648 96 79 1,403 82 64 Consumer direct loans 136 5 3 79 4 3 Credit cards 598 3 1 479 3 1 Consumer indirect loans 753 37 23 556 33 22 Total consumer loans 3,616 176 136 3,008 158 120 Total prior-year accruing TDRs 3,626 214 167 3,021 195 152 Total TDRs 6,147 $ 460 $ 365 6,084 $ 491 $ 399 (a) All TDRs that were restructured prior to January 1, 2019 , and January 1, 2018 , and are fully accruing. 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 March 31, 2019 , there were no commercial loan TDRs and 74 consumer loan TDRs with a combined recorded investment of $2 million that experienced payment defaults after modifications resulting in TDR status during 2018 . During the three months ended March 31, 2018 , there were no commercial loan TDRs and 41 consumer loan TDRs with a combined recorded investment of $1 million that experienced payment defaults after modifications resulting in TDR status during 2017 . ALLL and Liability for Credit Losses on Unfunded Lending-Related Commitments 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 101 of our 2018 Form 10-K. The ALLL on the acquired non-impaired loan portfolio is estimated using the same methodology as the originated portfolio, however, the estimated ALLL is compared to the remaining accretable yield to determine if an ALLL must be recorded. For PCI loans, Key estimates cash flows expected to be collected quarterly. Decreases in expected cash flows are recognized as impairment through a provision for loan and lease losses and an increase in the ALLL. The ALLL at March 31, 2019 , represents our best estimate of the incurred credit losses inherent in the loan portfolio at that date. The changes in the ALLL by loan category for the periods indicated are as follows: Three months ended March 31, 2019 : in millions December 31, 2018 Provision Charge-offs Recoveries March 31, 2019 Commercial and Industrial $ 532 $ 24 $ (36 ) $ 10 $ 530 Commercial real estate: Real estate — commercial mortgage 142 6 (5 ) 1 144 Real estate — construction 33 (1 ) (4 ) — 28 Total commercial real estate loans 175 5 (9 ) 1 172 Commercial lease financing 36 6 (8 ) 1 35 Total commercial loans 743 35 (53 ) 12 737 Real estate — residential mortgage 7 1 (1 ) 1 8 Home equity loans 35 3 (4 ) 2 36 Consumer direct loans 30 12 (10 ) 1 33 Credit cards 48 8 (11 ) 2 47 Consumer indirect loans 20 5 (8 ) 5 22 Total consumer loans 140 29 (34 ) 11 146 Total ALLL — continuing operations 883 64 (a) (87 ) 23 883 Discontinued operations 14 2 (4 ) 1 13 Total ALLL — including discontinued operations $ 897 $ 66 $ (91 ) $ 24 $ 896 (a) Excludes a credit for losses on lending-related commitments of $2 million . Three months ended March 31, 2018 : in millions December 31, 2017 Provision Charge-offs Recoveries March 31, 2018 Commercial and Industrial $ 529 $ 35 $ (37 ) $ 6 $ 533 Commercial real estate: Real estate — commercial mortgage 133 4 (1 ) — 136 Real estate — construction 30 2 — 1 33 Total commercial real estate loans 163 6 (1 ) 1 169 Commercial lease financing 43 (3 ) (1 ) 1 40 Total commercial loans 735 38 (39 ) 8 742 Real estate — residential mortgage 7 3 (1 ) — 9 Home equity loans 43 (4 ) (4 ) 3 38 Consumer direct loans 28 5 (8 ) 2 27 Credit cards 44 12 (12 ) 1 45 Consumer indirect loans 20 4 (8 ) 4 20 Total consumer loans 142 20 (33 ) 10 139 Total ALLL — continuing operations 877 58 (a) (72 ) 18 881 Discontinued operations 16 2 (4 ) 2 16 Total ALLL — including discontinued operations $ 893 $ 60 $ (76 ) $ 20 $ 897 (a) Excludes a provision for losses on lending-related commitments of $3 million . A breakdown of the individual and collective ALLL and the corresponding loan balances as of March 31, 2019 , follows: Allowance Outstanding March 31, 2019 Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit Impaired Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit Impaired in millions Commercial and industrial $ 2 $ 527 $ 1 $ 46,474 $ 169 $ 46,247 $ 58 Commercial real estate: Commercial mortgage — 142 2 14,344 61 14,111 172 Construction — 28 — 1,420 — 1,419 1 Total commercial real estate loans — 170 2 15,764 61 15,530 173 Commercial lease financing — 35 — 4,507 — 4,507 — Total commercial loans 2 732 3 66,745 230 66,284 231 Real estate — residential mortgage 3 4 1 5,615 47 5,267 301 Home equity loans 8 27 1 10,846 128 10,702 16 Consumer direct loans — 33 — 2,165 4 2,158 3 Credit cards — 47 — 1,086 3 1,083 — Consumer indirect loans 3 19 — 3,721 37 3,684 — Total consumer loans 14 130 2 23,433 219 22,894 320 Total ALLL — continuing operations 16 862 5 90,178 449 89,178 551 Discontinued operations 2 11 — 1,019 (a) 23 996 (a) — Total ALLL — including discontinued operations $ 18 $ 873 $ 5 $ 91,197 $ 472 $ 90,174 $ 551 (a) Amount includes $2 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 December 31, 2018 , follows: Allowance Outstanding December 31, 2018 Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit Impaired Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit Impaired in millions Commercial and Industrial $ 5 $ 526 $ 1 $ 45,753 $ 162 $ 45,530 $ 61 Commercial real estate: Commercial mortgage — 139 3 14,285 66 14,041 178 Construction — 33 — 1,666 — 1,664 2 Total commercial real estate loans — 172 3 15,951 66 15,705 180 Commercial lease financing — 36 — 4,606 — 4,606 — Total commercial loans 5 734 4 66,310 228 65,841 241 Real estate — residential mortgage 3 4 — 5,513 49 5,150 314 Home equity loans 8 26 1 11,142 127 10,998 17 Consumer direct loans — 30 — 1,809 4 1,802 3 Credit cards — 48 — 1,144 3 1,141 — Consumer indirect loans 3 17 — 3,634 36 3,598 — Total consumer loans 14 125 1 23,242 219 22,689 334 Total ALLL — continuing operations 19 859 5 89,552 447 88,530 575 Discontinued operations 2 12 — 1,073 (a) 23 1,050 (a) — Total ALLL — including discontinued operations $ 21 $ 871 $ 5 $ 90,625 $ 470 $ 89,580 $ 575 (a) Amount includes $2 million of loans carried at fair value that are excluded from ALLL consideration. The liability for credit losses inherent in unfunded lending-related commitments, such as letters of credit and unfunded loan commitments, is included in “accrued expense and other liabilities” on the balance sheet. We establish the amount of this reserve by considering both historical trends and current market conditions quarterly, or more often if deemed necessary. Changes in the liability for credit losses on unfunded lending-related commitments are summarized as follows: Three months ended March 31, in millions 2019 2018 Balance at beginning of period $ 64 $ 57 Provision (credit) for losses on lending-related commitments (2 ) 3 Balance at end of period $ 62 $ 60 PCI Loans 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. Our policies for determining, recording payments on, and derecognizing PCI loans are disclosed in Note 1 (“ Summary of Significant Accounting Policies ”) under the heading “Purchased Loans” beginning on page 105 of our 2018 Form 10-K. We have PCI loans from two separate acquisitions, one in 2012 and one in 2016. The following tables present the roll-forward of the accretable yield and the beginning and ending outstanding unpaid principal balance and carrying amount of all PCI loans for the three months ended March 31, 2019 , and the twelve months ended December 31, 2018 . Three Months Ended March 31, 2019 in millions Accretable Yield Carrying Amount Outstanding Unpaid Principal Balance Balance at beginning of period $ 117 $ 571 $ 607 Accretion (10 ) Net reclassifications from nonaccretable to accretable 13 Payments received, net (2 ) Balance at end of period $ 118 $ 547 $ 578 Twelve Months Ended December 31, 2018 in millions Accretable Yield Carrying Amount Outstanding Unpaid Principal Balance Balance at beginning of period $ 131 $ 738 $ 803 Accretion (42 ) Net reclassifications from nonaccretable to accretable 50 Payments received, net (21 ) Loans charged off (1 ) Balance at end of period $ 117 $ 571 $ 607

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	5. Fair Value Measurements In accordance with GAAP, Key measures certain assets and liabilities at fair value. Fair value is defined as the price to sell an asset or transfer a liability in an orderly transaction between market participants in our principal market. Additional information regarding our accounting policies for determining fair value is provided in Note 6 (“ Fair Value Measurements ”) and Note 1 (“ Summary of Significant Accounting Policies ”) under the heading “Fair Value Measurements” of our 2018 Form 10-K. 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 March 31, 2019 , and December 31, 2018 . March 31, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total in millions ASSETS MEASURED ON A RECURRING BASIS Trading account assets: U.S. Treasury, agencies and corporations — $ 746 — $ 746 — $ 578 — $ 578 States and political subdivisions — 46 — 46 — 60 — 60 Other mortgage-backed securities — 85 — 85 — 164 — 164 Other securities 1 68 — 69 — 22 — 22 Total trading account securities 1 945 — 946 — 824 — 824 Commercial loans — 33 — 33 — 25 — 25 Total trading account assets 1 978 — 979 — 849 — 849 Securities available for sale: U.S. Treasury, agencies and corporations — 270 — 270 — 147 — 147 States and political subdivisions — 6 — 6 — 7 — 7 Agency residential collateralized mortgage obligations — 14,080 — 14,080 — 13,962 — 13,962 Agency residential mortgage-backed securities — 2,143 — 2,143 — 2,105 — 2,105 Agency commercial mortgage-backed securities — 4,330 — 4,330 — 3,187 — 3,187 Other securities — — $ 25 25 — — $ 20 20 Total securities available for sale — 20,829 25 20,854 — 19,408 20 19,428 Other investments: Principal investments: Direct — — 1 1 — — 1 1 Indirect (measured at NAV) (a) — — — 83 — — — 96 Total principal investments — — 1 84 — — 1 97 Equity investments: Direct — 1 8 9 — 1 7 8 Direct (measured at NAV) (a) — — — 1 — — — 1 Indirect (measured at NAV) (a) — — — 9 — — — 9 Total equity investments — 1 8 19 — 1 7 18 Total other investments — 1 9 103 — 1 8 115 Loans, net of unearned income (residential) — — 3 3 — — 3 3 Loans held for sale (residential) — 70 1 71 — 54 — 54 Derivative assets: Interest rate — 526 3 529 — 410 5 415 Foreign exchange $ 45 31 — 76 $ 70 $ 36 $ — $ 106 Commodity — 233 — 233 — 333 — 333 Credit — 1 — 1 — 1 — 1 Other — 7 4 11 — 6 3 9 Derivative assets 45 798 7 850 70 786 8 864 Netting adjustments (b) — — — (324 ) — — — (333 ) Total derivative assets 45 798 7 526 70 786 8 531 Accrued income and other assets — — — — — — — — Total assets on a recurring basis at fair value $ 46 $ 22,676 $ 45 $ 22,536 $ 70 $ 21,098 $ 39 $ 20,980 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions $ 10 $ 669 — $ 679 $ 14 $ 530 — $ 544 Derivative liabilities: Interest rate — 237 — 237 — 297 — 297 Foreign exchange 36 32 — 68 58 37 — 95 Commodity — 223 — 223 — 323 — 323 Credit — 2 $ 1 3 — 1 — 1 Other — 8 — 8 — 7 — 7 Derivative liabilities 36 502 1 539 58 665 — 723 Netting adjustments (b) — — — (336 ) — — — (337 ) Total derivative liabilities 36 502 1 203 58 665 — 386 Accrued expense and other liabilities — — — — — — — — Total liabilities on a recurring basis at fair value $ 46 $ 1,171 $ 1 $ 882 $ 72 $ 1,195 — $ 930 (a) Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated balance sheet. (b) 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. 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. Qualitative Disclosures of Valuation Techniques The following table describes the valuation techniques and significant inputs used to measure the classes of assets and liabilities reported at fair value on a recurring basis, as well as the classification of each within the valuation hierarchy. Asset/liability class Valuation technique Valuation hierarchy classification(s) Securities (trading account assets and available for sale) Fair value of level 1 securities is determined by: • Quoted market prices available in an active market for identical securities. This includes exchange-traded equity securities. Fair value of level 2 securities is determined by: • Pricing models (either by a third party pricing service or internally). Inputs include: yields, benchmark securities, bids, 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. • Observable market prices of similar securities. Fair value of level 3 securities is determined by: • Internal models, principally discounted cash flow models (income approach). • Revenue multiples of comparable public companies (market approach). For level 3 securities, increases (decreases) in the discount rate and marketability discount used in the discounted cash flow models would have resulted in lower (higher) fair value measurements. Higher volatility factors would have further magnified changes in fair value. 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. Level 1, 2, and 3 (primarily Level 2) Commercial loans (trading account assets) Fair value is based on: • Observable market price spreads for similar loans. Valuations reflect prices within the bid-ask spread that are most representative of fair value. Level 2 Principal investments (direct) Direct principal investments consist of equity and debt instruments of private companies made by our principal investing entities. Fair value is determined using: • Operating performance and market multiples of comparable businesses • Other unique facts and circumstances related to each individual investment Direct principal investments are accounted for as investment companies in accordance with the applicable accounting guidance, whereby each investment is adjusted to fair value with any net realized or unrealized gain/loss recorded in the current period’s earnings. We are in the process of winding down our direct principal investment portfolio. As of March 31, 2019, the balance is less than $1 million. Level 3 Principal investments (indirect) Indirect principal 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 and qualify for the practical expedient 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). Indirect principal investments are also accounted for as investment companies, whereby each investment is adjusted to fair value with any net realized or unrealized gain/loss recorded in the current period’s earnings. Under the provisions of the Volcker Rule, we are required to dispose or conform our indirect investments to the requirements of the statute by no later than July 21, 2022. As of March 31, 2019, we have not committed to a plan to sell these investments. Therefore, these investments continue to be valued using the net asset value per share methodology. NAV The following table presents the fair value of our direct and indirect principal investments and related unfunded commitments at March 31, 2019 , as well as financial support provided for the three months ended March 31, 2019 , and March 31, 2018 . Financial support provided Three months ended March 31, March 31, 2019 2019 2018 in millions Fair Value Unfunded Commitments Funded Commitments Funded Other Funded Commitments Funded Other INVESTMENT TYPE Direct investments $ 1 — — $ 1 — — Indirect investments (measured at NAV) (a) 83 $ 25 $ 1 — — — Total $ 84 $ 25 1 $ 1 — — (a) 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. At March 31, 2019 , no significant liquidation of the underlying investments has been communicated to Key. 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. Asset/liability class Valuation technique Valuation hierarchy classification(s) Other direct equity investments Fair value is determined using: • Discounted cash flows • Operating performance and market/exit multiples of comparable businesses • Other unique facts and circumstances related to each individual investment For level 3 securities, increases (decreases) in the discount rate and marketability discount used in the discounted cash flow models would have resulted in lower (higher) fair value measurements. Higher volatility factors would have further magnified changes in fair value. Level 2 investments reflect the price of recent investments, which is deemed representative of fair value. Level 2 and 3 Other direct and indirect equity investments (NAV) Certain direct investments do not have readily determinable fair values and qualify for the practical expedient in the accounting guidance that allows us to estimate fair value based upon net asset value per share. NAV Loans held for sale and held for investment (residential) Residential mortgage loans held for sale are accounted for at fair value. The election of the fair value option aligns the accounting for these assets with the related forward loan sale commitments. Fair values are based on: • Quoted market prices, where available • Prices for other traded mortgage loans with similar characteristics • Purchase commitments and bid information received from market participants Prices are adjusted as necessary to include: • The embedded servicing value in the loans • The specific characteristics of certain loans that are priced based on the pricing of similar loans. (These adjustments represent unobservable inputs to the valuation but are not considered significant given the relative insensitivity of the value to changes in these inputs to the fair value of the loans.) Residential loans held for investment: Certain residential loans held for sale contain salability exceptions that make them unable to be sold into the performing loan sales market. Loans in this category are transferred to the held to maturity loan portfolio and are included in “Loans, net of unearned income” on the balance sheet. This type of loan is classified as level 3 in the valuation hierarchy as transaction details regarding sales of this type of loan are often unavailable. Fair value is based upon: • Unobservable bid information from brokers and investors Higher (lower) unobservable bid information would have resulted in higher (lower) fair value measurements. Level 1, 2 and 3 (primarily level 2) Derivatives Exchange-traded derivatives are valued using quoted prices in active markets and, therefore, are classified as Level 1 instruments. The majority of our derivative positions are level 2 and are valued using internally developed models based on market convention and observable market inputs. These derivative contracts include interest rate swaps, certain options, floors, cross currency swaps, credit default swaps, and forward mortgage loan sale commitments. Significant inputs used in the valuation models include: • Interest rate curves • Yield curves • LIBOR and Overnight Index Swap (OIS) discount rates • LIBOR and OIS curves, index pricing curves, foreign currency curves • Volatility surfaces (a three-dimensional graph of implied volatility against strike price and maturity) Level 1, 2, and 3 (primarily level 2) Asset/liability class Valuation technique Valuation hierarchy classification(s) Derivatives (continued) 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 The unobservable internally derived assumptions include: • Loss probabilities • Internal risk ratings of customers 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, higher (lower) loss probabilities and internal risk ratings would have resulted in a lower (higher) fair value measurement of the risk participations. A directionally similar change would have also applied to other customized derivative instruments classified as Level 3. We use interest rate lock commitments for our residential mortgage business, which are classified as Level 3 instruments. The significant components of the valuation model include: • Interest rates observable in the market • Investor supplied prices for similar securities • The probability of the loan closing (i.e. the "pull-through" amount, a significant unobservable input). Increases (decreases) in the probability of the loan closing would have resulted in higher (lower) fair value measurements. Valuation of residential mortgage forward sale commitments utilizes observable market prices of comparable commitments and mortgage securities (Level 2). Level 1, 2, and 3 (primarily level 2) Liability for short positions This includes fixed income securities held by our broker dealer in its trading inventory. Fair value of level 1 securities is determined by: • Quoted market prices available in an active market for identical securities Fair value of level 2 securities is determined by: • Observable market prices of similar securities • Market activity, spreads, credit ratings and interest rates for each security type Level 1 and 2 Changes in Level 3 Fair Value Measurements The following table shows the components of the change in the fair values of our Level 3 financial instruments for the three months ended March 31, 2019 , and March 31, 2018 . in millions Beginning of Period Balance Gains (Losses) Included in Other Comprehensive Income Gains (Losses) Included in Earnings Purchases Sales Settlements Transfers Other Transfers into Level 3 Transfers out of Level 3 End of Period Balance Unrealized Gains (Losses) Included in Earnings Three months ended March 31, 2019 Securities available for sale Other securities $ 20 $ 5 — — — — — — — $ 25 — Other investments Principal investments Direct 1 — — (a) $ 1 $ (1 ) — — — — 1 — (a) Equity investments Direct 7 — — — — — — $ 1 — 8 — Loans held for sale — — — — — — $ 1 — — 1 — Loans held for investment 3 — — — — — — — — 3 — Derivative instruments (b) Interest rate 5 — $ 1 (c) — — — — 1 (d) $ (4 ) (d) 3 — Credit — — — (c) (1 ) — — — — — (1 ) — Other (e) 3 — — — — — 1 — — 4 — in millions Beginning of Period Balance Gains (Losses) Included in Other Comprehensive Income Gains (Losses) Included in Earnings Purchases Sales Settlements Transfers Other Transfers into Level 3 Transfers out of Level 3 End of Period Balance Unrealized Gains (Losses) Included in Earnings Three months ended March 31, 2018 Securities available for sale Other securities $ 20 — — — — — — — — $ 20 — Other investments Principal investments Direct 13 $ — $ (1 ) (a) — — — — — — 12 $ (1 ) (a) Equity investments Direct 3 — — — — — — $ 4 — 7 — Loans held for sale 1 — — — — — — — — 1 — Loans held for investment (residential) 2 — — — — — — — — 2 — Derivative instruments (b) Interest rate 9 — (1 ) (c) — — — — 1 (d) $ (5 ) (d) 4 — Credit 1 — (5 ) (c) — — $ 4 — — — — — Other (e) 3 — — — — — $ — — — 3 — (a) Realized and unrealized gains and losses on principal investments are reported in “other income” on the income statement. (b) Amounts represent Level 3 derivative assets less Level 3 derivative liabilities. (c) Realized and unrealized gains and losses on derivative instruments are reported in “corporate services income” and “other income” on the income statement. (d) 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. (e) Amounts represent Level 3 interest rate lock commitments. 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 March 31, 2019 , and December 31, 2018 . The following table presents our assets measured at fair value on a nonrecurring basis at March 31, 2019 , and December 31, 2018 : March 31, 2019 December 31, 2018 in millions Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A NONRECURRING BASIS Impaired loans and leases — $ — $ 17 $ 17 — — $ 42 $ 42 Accrued income and other assets — — 2 2 — $ — 16 16 Total assets on a nonrecurring basis at fair value — $ — $ 19 $ 19 — $ — $ 58 $ 58 Qualitative Disclosures of Valuation Techniques The following table describes the valuation techniques and significant inputs used to measure the significant classes of assets and liabilities reported at fair value on a nonrecurring basis, as well as the classification of each within the valuation hierarchy. Asset/liability class Valuation technique Valuation hierarchy classification(s) Impaired loans and leases Loans are evaluated for impairment on a quarterly basis; impairment typically occurs when there is evidence of a probable loss and the expected value of the loan is less than the contractual value of the loan. The amount of the impairment may be determined based on the estimated present value of future cash flows, the fair value of the underlying collateral (Level 3), or the loan’s observable market price based on recent sales of similar loans and collateral (Level 2). Cash flow analysis considers internally developed inputs including: • Discount rates • Default rates • Changes in collateral values and costs of foreclosure Level 2 and 3 Commercial loans held for sale Through a quarterly analysis of our loan portfolios held for sale, which include both performing and nonperforming commercial loans, we determine any adjustments necessary to record the portfolios at the lower of cost or fair value in accordance with GAAP. Valuation inputs include: • Non-binding bids for the respective loans or similar loans • Recent sales transactions • Internal models that emulate recent securitizations Level 2 and 3 Asset/liability class Valuation technique Valuation hierarchy classification(s) Direct financing leases and operating lease assets held for sale Valuations of direct financing leases and operating lease assets held for sale are performed using an internal model that relies on market data, including: • Swap rates and bond ratings • Our own assumptions about the exit market for the leases • Details about the individual leases in the portfolio Leases for which we receive a current nonbinding bid, and for which the sale is considered probable, may be classified as Level 2. Valuations of lease and operating lease assets held for sale that employ our own assumptions are classified as Level 3 assets. The inputs based on our own assumptions include changes in the value of leased items and internal credit ratings. Level 2 and 3 OREO and other repossessed personal property OREO and other repossessed properties are valued based on: • Appraisals and third-party price opinions, less estimated selling costs Generally, we classify these assets as Level 3, but OREO and other repossessed properties for which we receive binding purchase agreements are classified as Level 2. Returned lease inventory is valued based on market data for similar assets and is classified as Level 2. Level 2 and 3 LIHTC, HTC, and NMTC investments Valuation of LIHTC, HTC and NMTC involves measuring the present value of future tax benefits and comparing that value against the current carrying value of the investment. Expected future tax benefit are discounted to their present value using discounted cash flow modeling that incorporates an appropriate risk premium. LIHTC and HTC investments are impaired when it is more likely than not that the carrying amount of the investment will not be realized. Level 3 Other equity investments We have other investments in equity securities that do not have readily determinable fair values and do not qualify for the practical expedient to measure the investment using a net asset value per share. We have elected to measure these securities at cost less impairment plus or minus adjustments due to observable orderly transactions. Impairment is recorded when there is evidence that the expected fair value of the investment has declined to below the recorded cost. At each reporting period, we assess if these investments continue to qualify for this measurement alternative. At March 31, 2019, and December 31, 2018, the carrying amount of equity investments under this method was $127 million and $107 million, respectively. No impairment was recorded for the three months ended March 31, 2019. Level 3 Mortgage Servicing Rights Refer to Note 8. Mortgage Servicing Assets Level 3 Quantitative Information about Level 3 Fair Value Measurements The following table describes the significant unobservable inputs of our level 3 assets and liabilities: March 31, 2019 Level 3 Asset (Liability) Valuation Technique Significant Unobservable Input Range (Weighted-Average) (b), (c) dollars in millions Recurring Securities available-for-sale: Other investments $ 25 Discounted cash flows Discount rate 14.34 - 15.01% (14.62%) Marketability discount N/A (30.00%) Volatility factor 37.00 - 42.00% (39.93%) Other investments: (a) Equity investments Direct 8 Discounted cash flows Discount rate 14.83 - 17.59% (15.72%) Marketability discount N/A (30.00%) Volatility factor N/A (49.00%) Loans held for sale (residential) 1 Market comparable pricing Comparability factor 80.50 - 97.00% (86.74%) Loans held for investment (residential) 3 Market comparable pricing Comparability factor 77.57 - 94.75% (89.50%) Derivative instruments: Interest rate 3 Discounted cash flows Probability of default .02 - 100% (2.1%) Internal risk rating 1 - 19 (8.80) Loss given default 0 - 1 (.49) Credit (1 ) Discounted cash flows Probability of default .02 - 100% (2.57%) Internal risk rating 1 - 19 (9.32) Loss given default 0 - 1 (.50) Other (d) 4 Discounted cash flows Loan closing rates 35.93 - 99.69% (76.10%) Nonrecurring Impaired loans $ 17 Fair value of underlying collateral Discount rate 20.00 - 50.00% (23.00%) Accrued income and other assets: OREO and other Level 3 assets $ 2 Appraised value Appraised value N/M December 31, 2018 Level 3 Asset (Liability) Valuation Technique Significant Unobservable Input Range (Weighted-Average (b)(c) ) dollars in millions Nonrecurring Impaired loans $ 42 Fair value of underlying collateral Discount rate 20.00 - 40.00% (21.00%) (a) Principal investments, direct is excluded from this table as the balance at March 31, 2019 , is insignificant (less than $1 million). (b) The weighted average of significant unobservable inputs is calculated using a weighting relative to fair value. (c) For significant unobservable inputs with no range, a single figure is reported to denote the single quantitative factor used. (d) Amounts represent interest rate lock commitments. Fair Value Disclosures of Financial Instruments The levels in the fair value hierarchy ascribed to our financial instruments and the related carrying amounts at March 31, 2019 , and December 31, 2018 , are shown in the following tables. Assets and liabilities are further arranged by measurement category. March 31, 2019 Fair Value in millions Carrying Amount Level 1 Level 2 Level 3 Measured at NAV Netting Adjustment Total ASSETS (by measurement category) Fair value - net income Trading account assets (b) $ 979 $ 1 $ 978 — — — $ 979 Other investments (b) 646 — 1 $ 552 $ 93 — 646 Loans, net of unearned income (d) 3 — — 3 — — 3 Loans held for sale (b) 71 — 70 1 — — 71 Derivative assets - trading (b) 489 45 774 7 — $ (337 ) (f) 489 Fair value - OCI Securities available for sale (b) 20,854 — 20,829 $ 25 — — 20,854 Derivative assets - hedging (b)(g) 37 — 24 — — 13 (f) 37 Amortized cost Held-to-maturity securities (c) 11,234 — 10,997 — — — 10,997 Loans, net of unearned income (d) 89,292 — — 87,378 — — 87,378 Loans held for sale (b) 823 — — 823 — — 823 Other Cash and short-term investments (a) 3,122 3,122 — — — — 3,122 LIABILITIES (by measurement category) Fair value - net income Derivative liabilities - trading (b) $ 198 $ 36 $ 492 1 — $ (331 ) (f) $ 198 Fair value - OCI Derivative liabilities - hedging (b)(g) 5 — 10 — — (5 ) (f) 5 Amortized cost Time deposits (e) 13,969 — 14,076 — — — 14,076 Short-term borrowings (a) 945 $ 10 935 — — — 945 Long-term debt (e) 14,168 13,235 1,222 — — — 14,457 Other Deposits with no stated maturity (a) 94,206 — 94,206 — — — 94,206 December 31, 2018 Fair Value in millions Carrying Amount Level 1 Level 2 Level 3 Measured at NAV Netting Adjustment Total ASSETS (by measurement category) Fair value - net income Trading account assets (b) $ 849 — $ 849 — — — $ 849 Other investments (b) 666 — 1 $ 559 $ 106 — 666 Loans, net of unearned income (d) 3 — — 3 — — 3 Loans held for sale (b) 54 — 54 — — — 54 Derivative assets - trading (b) 462 $ 68 736 8 — $ (350 ) (f) 462 Fair value - OCI Securities available for sale (b) 19,428 — 19,408 20 — — 19,428 Derivative assets - hedging (b)(g) 69 2 50 — — 17 (f) 69 Amortized cost Held-to-maturity securities (c) 11,519 — 11,122 — — — 11,122 Loans, net of unearned income (d) 88,666 — — 86,224 — — 86,224 Loans held for sale (b) 1,173 — — 1,173 — — 1,173 Other Cash and short-term investments (a) 3,240 3,240 — — — — 3,240 LIABILITIES (by measurement category) Fair value - net income Derivative liabilities - trading (b) $ 395 $ 58 $ 675 — — $ (338 ) (f) $ 395 Fair value - OCI Derivative liabilities - hedging (b)(g) (9 ) — (10 ) — — 1 (f) (9 ) Amortized cost Time deposits (e) 13,245 — 13,331 — — — 13,331 Short-term borrowings (a) 863 14 849 — — — 863 Long-term debt (e) 13,732 12,576 $ 1,211 — — — 13,787 Other Deposits with no stated maturity (a) 94,064 — 94,064 — — — 94,064 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 and Liabilities Measured at Fair Value on a Nonrecurring Basis” in this Note. Investments accounted for under the cost method (or cost less impairment adjusted for observable price changes for certain equity investments) are classified as Level 3 assets. These investments are not actively traded in an open market as sales for these types of investments are rare. The carrying amount of the investments carried at cost are adjusted for declines in value if they are considered to be other-than-temporary (or due to observable orderly transactions of the same issuer for equity investments eligible for the cost less impairment measurement alternative). These adjustments are included in “other income” on the income statement. (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 that 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 the 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. (g) Derivative assets-hedging and derivative liabilities-hedging includes both cash flow and fair value hedges. Additional information regarding our accounting policies for cash flow and fair value hedges is provided in Note 1 (“ 1. Summary of Significant Accounting Policies ”) under the heading “Derivatives and Hedging” beginning on page 103 of our 2018 Form 10-K. Education lending business . The discontinued education lending business consists of loans in portfolio recorded at carrying value with appropriate valuation reserves, and loans in portfolio recorded at fair value. All of these loans were excluded from the table above as follows: • Loans at carrying value, net of allowance, of $1.0 billion ( $0.8 billion at fair value) at March 31, 2019 , and $1.1 billion ( $0.9 billion at fair value) at December 31, 2018 ; • Portfolio loans at fair value of $2 million at March 31, 2019 , and $2 million at December 31, 2018 .

Securities

Securities	3 Months Ended
	Mar. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Securities	6. 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. March 31, 2019 December 31, 2018 in millions Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value SECURITIES AVAILABLE FOR SALE U.S. Treasury, agencies, and corporations $ 272 — $ 2 $ 270 $ 150 — $ 3 $ 147 States and political subdivisions 6 — — 6 7 — — 7 Agency residential collateralized mortgage obligations 14,277 $ 45 242 14,080 14,315 $ 20 373 13,962 Agency residential mortgage-backed securities 2,138 27 22 2,143 2,128 13 36 2,105 Agency commercial mortgage-backed securities 4,392 46 108 4,330 3,300 19 132 3,187 Other securities 17 8 — 25 17 3 — 20 Total securities available for sale $ 21,102 $ 126 $ 374 $ 20,854 $ 19,917 $ 55 $ 544 $ 19,428 HELD-TO-MATURITY SECURITIES Agency residential collateralized mortgage obligations $ 6,762 6 $ 175 $ 6,593 $ 7,021 2 $ 254 $ 6,769 Agency residential mortgage-backed securities 475 — 6 469 490 $ — 14 476 Agency commercial mortgage-backed securities 3,982 7 69 3,920 3,996 2 133 3,865 Other securities 15 — — 15 12 — — 12 Total held-to-maturity securities $ 11,234 $ 13 $ 250 $ 10,997 $ 11,519 $ 4 $ 401 $ 11,122 The following table summarizes our securities that were in an unrealized loss position as of March 31, 2019 , and December 31, 2018 . Duration of Unrealized Loss Position Less than 12 Months 12 Months or Longer Total in millions Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses March 31, 2019 Securities available for sale: U.S Treasury, agencies, and corporations — — $ 148 $ 2 $ 148 $ 2 Agency residential collateralized mortgage obligations $ 347 $ 1 9,807 241 10,154 242 Agency residential mortgage-backed securities 1 — (a) 1,047 22 1,048 22 Agency commercial mortgage-backed securities — — 1,742 108 1,742 108 Held-to-maturity securities: (a) Agency residential collateralized mortgage obligations 77 — (a) 6,092 175 6,169 175 Agency residential mortgage-backed securities 95 — (a) 374 6 469 6 Agency commercial mortgage-backed securities 203 — (a) 2,593 69 2,796 69 Other securities (a) 3 — (a) — — 3 — Total temporarily impaired securities $ 726 $ 1 $ 21,803 $ 623 $ 22,529 $ 624 December 31, 2018 Securities available for sale: U.S. Treasury, agencies, and corporations — — $ 147 $ 3 $ 147 $ 3 Agency residential collateralized mortgage obligations $ 570 $ 2 10,945 371 11,515 373 Agency residential mortgage-backed securities 4 — (b) 1,087 36 1,091 36 Agency commercial mortgage-backed securities — — 1,729 132 1,729 132 Held-to-maturity securities: Agency residential collateralized mortgage obligations — — 6,416 254 6,416 254 Agency residential mortgage-backed securities — — 475 14 475 14 Agency commercial mortgage-backed securities 73 — (b) 3,359 133 3,432 133 Total temporarily impaired securities $ 647 $ 2 $ 24,158 $ 943 $ 24,805 $ 945 (a) At March 31, 2019 , gross unrealized losses totaled less than $1 million for agency residential mortgage-backed securities available for sale and less than $1 million for all held-to-maturity securities with a loss duration of less than 12 months. (b) At December 31, 2018 , gross unrealized losses totaled less than $1 million for agency residential mortgage-backed securities available for sale with a loss duration of less than 12 months and less than $1 million for agency commercial mortgage-backed securities held-to-maturity with a loss duration of less than 12 months. At March 31, 2019 , we had $242 million of gross unrealized losses related to 403 fixed-rate agency residential CMOs that we invested in as part of our overall A/LM strategy. These securities had a weighted-average maturity of 4.21 years at March 31, 2019 . At March 31, 2019 , we also had $22 million of gross unrealized losses related to 240 agency residential mortgage-backed securities positions and $108 million of gross unrealized losses related to 14 agency commercial mortgage backed securities positions with weighted-average maturities of 3.94 years and 4.06 years, respectively. 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 through 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. We did no t have any impairment losses recognized in earnings for the three months ended March 31, 2019 . At March 31, 2019 , securities available for sale and held-to-maturity securities totaling $9.0 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 our securities by remaining maturity. CMOs and other mortgage-backed securities in the available for sale portfolio and 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. March 31, 2019 Securities Available for Sale Held to Maturity Securities in millions Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 271 $ 276 $ 52 $ 52 Due after one through five years 15,750 15,510 6,791 6,647 Due after five through ten years 5,071 5,057 4,391 4,298 Due after ten years 10 11 — — Total $ 21,102 $ 20,854 $ 11,234 $ 10,997

Derivatives and Hedging Activit

Derivatives and Hedging Activities	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives and Hedging Activities	7. Derivatives and Hedging Activities We are a party to various derivative instruments, mainly through our subsidiary, KeyBank. 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 our loan portfolio, hedge against changes in foreign currency exchange rates, and meet client financing and hedging needs. At March 31, 2019 , after taking into account the effects of bilateral collateral and master netting agreements, we had $37 million of derivative assets and $5 million of derivative liabilities that relate to contracts entered into for hedging purposes. 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 $489 million and derivative liabilities of $198 million that were not designated as hedging instruments. These positions are primarily comprised of derivative contracts entered into for client accommodation purposes. Additional information regarding our accounting policies for derivatives is provided in Note 1 (“ Summary of Significant Accounting Policies ”) under the heading “Derivatives and Hedging” beginning on page 103 of our 2018 Form 10-K. Our derivative strategies and related risk management objectives are described in Note 8 (“ Derivatives and Hedging Activities ”) beginning on page 132 of our 2018 Form 10-K. 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 March 31, 2019 , and December 31, 2018 . The derivative asset and liability balances are presented on a gross basis, prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. 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. Securities collateral related to legally enforceable master netting agreements is not offset on the balance sheet. Our derivative instruments are included in “accrued income and other assets” or “accrued expenses and other liabilities” on the balance sheet, as follows: March 31, 2019 December 31, 2018 Fair Value Fair Value in millions Notional Amount Derivative Assets Derivative Liabilities Notional Amount Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate $ 32,840 $ 24 $ 10 $ 28,546 $ 50 $ (10 ) Foreign exchange 122 — — 122 2 — Total 32,962 24 10 28,668 52 (10 ) Derivatives not designated as hedging instruments: Interest rate 65,136 505 227 63,454 365 307 Foreign exchange 5,664 76 68 6,829 104 95 Commodity 6,622 233 223 2,002 333 323 Credit 415 1 3 226 1 1 Other (a) 3,266 11 8 1,466 9 7 Total 81,103 826 529 73,977 812 733 Netting adjustments (b) — (324 ) (336 ) — (333 ) (337 ) Net derivatives in the balance sheet 114,065 526 203 102,645 531 386 Other collateral (c) — (2 ) (46 ) — (2 ) (33 ) Net derivative amounts $ 114,065 $ 524 $ 157 $ 102,645 $ 529 $ 353 (a) Other derivatives include interest rate lock commitments and forward sale commitments related to our residential mortgage banking activities, forward purchase and sales contracts consisting of contractual commitments associated with “to be announced” securities and when-issued securities, and other customized derivative contracts. (b) 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. (c) 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. During the three -month period ended March 31, 2019 , we did not exclude any portion of fair value hedging instruments from the assessment of hedge effectiveness. The following tables summarize the amounts that were recorded on the balance sheet as of March 31, 2019 , and December 31, 2018 , related to cumulative basis adjustments for fair value hedges. March 31, 2019 in millions Balance sheet line item in which the hedge item is included Carrying amount of hedged item (a) Hedge accounting basis adjustment (b) Interest rate contracts Long-term debt $ 9,400 $ 87 Interest rate contracts Certificate of deposit ($100,000 or more) 340 — Interest rate contracts Other time deposits 176 — December 31, 2018 Balance sheet line item in which the hedge item is included Carrying amount of hedged item (a) Hedge accounting basis adjustment (b) Interest rate contracts Long-term debt $ 9,363 $ (6 ) Interest rate contracts Certificate of deposit ($100,000 or more) 343 (1 ) Interest rate contracts Other time deposits 178 — (a) The carrying amount represents the portion of the liability designated as the hedged item. (b) Basis adjustments related to de-designated hedged items that no longer qualify as fair value hedges reduced the hedge accounting basis adjustment by $10 million and $10 million at March 31, 2019 , and December 31, 2018 , respectively, Cash flow hedges. During the three -month period ended March 31, 2019 , we did not exclude any portion of cash flow hedging instruments from the assessment of hedge effectiveness. Considering the interest rates, yield curves, and notional amounts as of March 31, 2019 , we expect to reclassify an estimated $22 million of after-tax net gains on derivative instruments designated as cash flow hedges from AOCI to income during the next 12 months . In addition, we expect to reclassify approximately $17 million of net losses related to terminated cash flow hedges from AOCI to income during the next 12 months. As of March 31, 2019 , the maximum length of time over which we hedge forecasted transactions is 10 years. The following tables summarize the effect of fair value and cash flow hedge accounting on the income statement for the three- month periods ended March 31, 2019 , and March 31, 2018 . Location and amount of net gains (losses) recognized in income on fair value and cash flow hedging relationships (a) in millions Interest expense – long-term debt Interest income – loans Interest expense - deposits Other income Three months ended March 31, 2019 Total amounts presented in the consolidated statement of income $ (120 ) $ 1,066 $ (202 ) $ 10 Net gains (losses) on fair value hedging relationships Interest contracts Recognized on hedged items (93 ) — — — Recognized on derivatives designated as hedging instruments 82 — — — Net income (expense) recognized on fair value hedges (11 ) — — — Net gain (loss) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from AOCI into net income (1 ) (24 ) — — Net income (expense) recognized on cash flow hedges $ (1 ) $ (24 ) — — Three months ended March 31, 2018 Total amounts presented in the consolidated statement of income $ (92 ) $ 940 $ (91 ) $ 21 Net gains (losses) on fair value hedging relationships Interest contracts Recognized on hedged items 71 — — — Recognized on derivatives designated as hedging instruments (69 ) — — — Net income (expense) recognized on fair value hedges 2 — — — Net gain (loss) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from AOCI into net income (1 ) (2 ) — — Net income (expense) recognized on cash flow hedges $ (1 ) $ (2 ) — — (a) Prior period gain or loss amounts were not restated to conform to the new hedge accounting guidance adopted in 2018. Net investment hedges. We enter into foreign currency forward contracts to hedge our exposure to changes in the carrying value of our investments as a result of changes in the related foreign exchange rates. At March 31, 2019 , AOCI reflected unrecognized, after-tax gains totaling $26 million related to cumulative changes in the fair value of our net investment hedges, which offset the unrecognized, after-tax foreign currency losses on net investment balances. We did not exclude any portion of our hedging instruments from the assessment of hedge effectiveness during the three -month period ended March 31, 2019 . The following tables summarize the pre-tax net gains (losses) on our cash flow and net investment hedges for the three- month periods ended March 31, 2019 , and March 31, 2018 , and where they are recorded on the income statement. The table includes net gains (losses) recognized in OCI during the period and net gains (losses) reclassified from OCI into income during the current period. in millions Net Gains (Losses) Recognized in OCI Income Statement Location of Net Gains (Losses) Reclassified From OCI Into Income Net Gains (Losses) Reclassified From OCI Into Income Net Gains (Losses) Recognized in Other Income Three months ended March 31, 2019 Cash Flow Hedges Interest rate $ 115 Interest income — Loans $ (24 ) $ — Interest rate (1 ) Interest expense — Long-term debt (1 ) — Interest rate (5 ) Investment banking and debt placement fees — — Net Investment Hedges Foreign exchange contracts (3 ) Other Income — — Total $ 106 $ (25 ) $ — Three months ended March 31, 2018 Cash Flow Hedges Interest rate $ (88 ) Interest income — Loans $ (2 ) — Interest rate 2 Interest expense — Long-term debt (1 ) — Net Investment Hedges Foreign exchange contracts — Other Income — — Total $ (86 ) $ (3 ) — Nonhedging instruments The following table summarizes the pre-tax net gains (losses) on our derivatives that are not designated as hedging instruments for the three- month periods ended March 31, 2019 , and March 31, 2018 , and where they are recorded on the income statement. Three months ended March 31, 2019 Three months ended March 31, 2018 in millions Corporate services income Consumer mortgage income Other income Total Corporate services income Consumer mortgage income Other income Total NET GAINS (LOSSES) Interest rate $ 8 — $ (2 ) $ 6 $ 9 — $ 2 $ 11 Foreign exchange 10 — — 10 11 — — 11 Commodity 1 — — 1 3 — — 3 Credit 1 — (7 ) (6 ) 2 — (5 ) (3 ) Other — — 1 1 — — (4 ) (4 ) Total net gains (losses) $ 20 — $ (8 ) $ 12 $ 25 — $ (7 ) $ 18 Counterparty Credit Risk We hold collateral in the form of cash and highly rated securities issued by the U.S. Treasury, government-sponsored enterprises, or GNMA. Cash collateral of $68 million was netted against derivative assets on the balance sheet at March 31, 2019 , compared to $33 million of cash collateral netted against derivative assets at December 31, 2018 . The cash collateral netted against derivative liabilities totaled $80 million at March 31, 2019 , and $37 million at December 31, 2018 . Our means of mitigating and managing exposure to credit risk on derivative contracts is described in Note 8 (“ Derivatives and Hedging Activities ”) beginning on page 136 of our 2018 Form 10-K under the heading “Counterparty Credit Risk.” 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 March 31, 2019 December 31, 2018 Interest rate $ 438 $ 308 Foreign exchange 49 60 Commodity 96 187 Credit — — Other 11 9 Derivative assets before collateral 594 564 Less: Related collateral 68 33 Total derivative assets $ 526 $ 531 We enter into derivative transactions with two primary groups: broker-dealers and banks, and clients. Given that 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. At March 31, 2019 , we had gross exposure of $244 million to broker-dealers and banks. We had net exposure of $87 million after the application of master netting agreements and cash collateral, where such qualifying agreements exist. We had net exposure of $83 million after considering $4 million of additional collateral held in the form of securities. We enter into transactions with clients to accommodate their business needs. 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 “accrued income and other assets”) in the amount of $5 million at March 31, 2019 , which we estimate to be the potential future losses on amounts due from client counterparties in the event of default. At March 31, 2019 , we had gross exposure of $490 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 $439 million on our derivatives with these counterparties after the application of master netting agreements, collateral, and the related reserve. Credit Derivatives We are a buyer and, under limited circumstances, may be a 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. Our credit derivative portfolio was in a net liability position of $2 million as of March 31, 2019 , and $1 million as of December 31, 2018 . Our credit derivative portfolio consists of single-name credit default swaps, traded credit default swap indices, and risk participation agreements. Additional descriptions of our credit derivatives are provided in Note 8 (“ Derivatives and Hedging Activities ”) beginning on page 137 of our 2018 Form 10-K under the heading “Credit Derivatives.” The following table provides information on the types of credit derivatives sold by us and held on the balance sheet at March 31, 2019 , and December 31, 2018 . The sold credit derivatives represented in the following table include only Risk Participation Agreements; there were no traded indexes sold. The notional amount represents the maximum amount that the seller could be required to pay. The payment/performance risk assessment at March 31, 2019 , is based on the internal probability of default of the reference entity consistent with our Fair Value Methodology. The payment/performance risk shown in the table represents a weighted-average of the default probabilities for all reference entities. These default probabilities are directly correlated to the probability that we will have to make a payment under the credit derivative contracts. March 31, 2019 December 31, 2018 dollars in millions Notional Amount Average Term (Years) Payment / Performance Risk Notional Amount Average Term (Years) Payment / Performance Risk Other $ 64 14.06 2.98 % $ 22 13.43 17.18 % Total credit derivatives sold $ 64 — — $ 22 — — 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 March 31, 2019 , 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 March 31, 2019 , 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 $78 million , which was comprised of $70 million in derivative assets and $148 million in derivative liabilities. We had $6 million in cash and securities collateral posted to cover those positions as of March 31, 2019 . There were no derivative contracts with credit risk contingent features held by KeyCorp at March 31, 2019 . 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 March 31, 2019 , and December 31, 2018 . The additional collateral amounts were calculated based on scenarios under which KeyBank’s ratings are downgraded one, two, or three ratings as of March 31, 2019 , and December 31, 2018 , 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 March 31, 2019 , and December 31, 2018 . 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. March 31, 2019 December 31, 2018 in millions Moody’s S&P Moody’s S&P KeyBank’s long-term senior unsecured credit ratings A3 A- A3 A- One rating downgrade $ 2 $ 2 $ 2 $ 2 Two rating downgrades 2 2 2 2 Three rating downgrades 2 2 2 2 KeyBank’s long-term senior unsecured credit rating was four ratings above noninvestment grade at Moody’s and S&P as of March 31, 2019 , and December 31, 2018 . If KeyBank’s ratings had been downgraded below investment grade as of March 31, 2019 , or December 31, 2018 , payments of less than $1 million and $4 million , respectively, 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 March 31, 2019 , or December 31, 2018 , no

Mortgage Servicing Assets

Mortgage Servicing Assets	3 Months Ended
	Mar. 31, 2019
Servicing Asset [Abstract]
Mortgage Servicing Assets	8. Mortgage Servicing Assets We originate and periodically sell commercial and residential 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. 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” beginning on page 106 of our 2018 Form 10-K. Commercial Changes in the carrying amount of commercial mortgage servicing assets are summarized as follows: Three months ended March 31, in millions 2019 2018 Balance at beginning of period $ 502 $ 412 Servicing retained from loan sales 18 27 Purchases 6 21 Amortization (29 ) (25 ) Balance at end of period $ 497 $ 435 Fair value at end of period $ 727 $ 537 The fair value of commercial 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 determine the fair value of our commercial mortgage servicing assets at March 31, 2019 , and March 31, 2018 , along with the valuation techniques, are shown in the following table: dollars in millions March 31, 2019 March 31, 2018 Valuation Technique Significant Unobservable Input Range (Weighted Average) Discounted cash flow Expected defaults 1.00 - 2.00% (1.14%) 1.00 - 3.00% (1.18%) Residual cash flows discount rate 7.00 - 15.00% (9.19%) 7.00 - 15.00% (8.99%) Escrow earn rate 2.22 - 3.70% (2.98%) 2.17 - 3.45% (2.84%) Loan assumption rate 0.00 - 3.18% (1.39%) 0.00 - 2.84% (1.18%) If these economic assumptions change or prove incorrect, the fair value of commercial mortgage servicing assets may also change. Expected credit losses, escrow earning rates, and discount rates are critical to the valuation of commercial mortgage 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 commercial mortgage 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 earning rates would cause a decrease in the fair value of our commercial 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 commercial mortgage servicing assets. Prepayment activity on commercial serviced loans does not significantly affect the valuation of our commercial mortgage servicing assets. Unlike residential mortgages, commercial mortgages experience significantly lower prepayments due to certain contractual restrictions affecting the borrower’s ability to prepay the mortgage. The amortization of commercial servicing assets is determined in proportion to, and over the period of, the estimated net servicing income. The amortization of commercial servicing assets for each period, as shown in the table at the beginning of this note, is recorded as a reduction to contractual fee income. The contractual fee income from servicing commercial mortgage loans totaled $46 million for the three-month period ended March 31, 2019 , and $42 million for the three-month period ended March 31, 2018 . This fee income was offset by $29 million of amortization for the three-month period ended March 31, 2019 , and $25 million for the three-month period ended March 31, 2018 . Both the contractual fee income and the amortization are recorded, net, in “mortgage servicing fees” on the income statement. Residential Changes in the carrying amount of residential mortgage servicing assets are summarized as follows: Three months ended March 31, in millions 2019 2018 Balance at beginning of period $ 37 $ 31 Servicing retained from loan sales 2 2 Purchases — — Amortization (1 ) (1 ) Balance at end of period $ 38 $ 32 Fair value at end of period $ 50 $ 42 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 March 31, 2019 , and March 31, 2018 , along with the valuation techniques, are shown in the following table: dollars in millions March 31, 2019 March 31, 2018 Valuation Technique Significant Unobservable Input Range (Weighted Average) Discounted cash flow Prepayment speed 9.32 - 58.76% (9.93%) 8.37 - 48.63% (9.12%) Discount rate 7.50 - 10.00% (7.54%) 8.50 - 11.00% (8.54%) Servicing cost $62 - $4,375 ($68.23) $76 - $4,385 ($83.05) If these economic assumptions change or prove incorrect, the fair value of residential mortgage servicing assets may also change. Prepayment speed, discount rates, and servicing cost 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. An increase in the prepayment speed, assigned discount rates, and servicing cost assumptions would also cause a negative impact on the fair value of our residential mortgage servicing assets. The amortization of residential servicing assets is determined in proportion to, and over the period of, the estimated net residential servicing income. The amortization of servicing assets for March 31, 2019 , as shown in the table above, is recorded as a reduction to contractual fee income. The contractual fee income from servicing residential mortgage loans totaled $4 million for the three-month period ended March 31, 2019 , and $3 million for the three-month period ended March 31, 2018 . This fee income was offset by $1 million of amortization for both the three-month periods ended March 31, 2019 , and March 31, 2018

Leases

Leases	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Leases	9. Leases As a lessee, we enter into leases of land, buildings and equipment. Our real estate leases primarily relate to bank branches and office space. The leases of equipment principally relate to technology assets for data processing and data storage. As a lessor, we primarily provide financing through our equipment leasing business. Lessee Our leases are classified as either operating or financing and have remaining terms ranging from 1 to 20 years with the exception of certain ground leases that have terms over 30 years. Leases with an initial term of less than 1 year are not recorded on the balance sheet. The related expense is recognized on a straight-line basis over the lease term. For leases with initial terms greater than one year, right-of-use assets are reported on the balance sheet. Certain leases contain options to extend the lease term for up to five years . Most leases also give us the option to terminate at our discretion. Leases with variable payments are primarily based on adjustments for inflation over the term of the lease based on a contractually defined index. Certain ATM leases include variable payments based on volume of transactions. Operating lease expense is recognized in "net occupancy" and "equipment" on the statement of income. The components of lease expense are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Operating lease cost $ 34 Variable lease cost 5 Total lease cost $ 39 (a) The amortization of right-of-use assets and interest on lease liabilities for finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) Short-term lease cost was less than less than $1 million for the three months ended March 31, 2019 . Cash flows related to leases are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 36 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 28 (a) Operating and financing cash flows from finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) There were no right-of-use assets obtained in exchange for finance lease obligations for the three months ended March 31, 2019 . Additional balance sheet information related to leases is summarized as follows: March 31, in millions Balance sheet classification 2019 Operating lease assets Accrued income and other assets $ 694 Operating lease liabilities Accrued expense and other liabilities 787 Finance leases: Property and equipment, gross Premises and equipment 28 Accumulated depreciation Premises and equipment (16 ) Property and equipment, net 12 Finance lease liabilities Long-term debt 15 Information pertaining to the lease term and weighted-average discount rate is summarized as follows: March 31, 2019 Weighted-average remaining lease term: Operating leases 7.9 years Finance leases 7.6 years Weighted-average discount rate: Operating leases 3.28 % Finance leases 4.12 % Maturities of lease liabilities are summarized as follows: in millions Operating Leases Finance Leases Total 2019 $ 108 $ 2 $ 110 2020 139 3 142 2021 123 3 126 2022 108 3 111 2023 93 2 95 Thereafter 332 5 337 Total lease payments 903 18 921 Less imputed interest 116 3 119 Total $ 787 $ 15 $ 802 Lessor Equipment Leasing Leases may have fixed or floating rate terms. Variable payments are based on an index or other specified rate and are included in rental payments. Certain leases contain an option to extend the lease term or the option to terminate at the discretion of the lessee. Under certain conditions, lease agreements may also contain the option for a lessee to purchase the underlying asset. Interest income from sales-type and direct financing leases is recognized in "interest income — loans" on the statement of income. Income related to operating leases is recognized in “operating lease income and other leasing gains” on the statement of income. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2019 Sales-type and direct financing leases Interest income on lease receivable $ 30 Interest income related to accretion of unguaranteed residual asset 3 Interest income on deferred fees and costs — Total sales-type and direct financing lease income 33 Operating leases Operating lease income related to lease payments 33 Other operating leasing gains 4 Total operating lease income and other leasing gains 37 Total lease income $ 70 Equipment leasing receivables relate to sales-type and direct financing leases. The composition of the net investment in sales-type and direct financing leases is as follows: in millions March 31, 2019 Lease receivables $ 3,597 Unearned income (346 ) Unguaranteed residual value 428 Deferred fees and costs 17 Net investment in sales-type and direct financing leases $ 3,696 The residual value component of a lease represents the fair value of the leased asset at the end of the lease term. We rely on industry data, historical experience, independent appraisals and the experience of the equipment leasing asset management team to value lease residuals. Relationships with a number of equipment vendors give the asset management team insight into the life cycle of the leased equipment, pending product upgrades and competing products. The carrying amount of residual assets covered by residual value guarantees was $269 million at March 31, 2019 . At March 31, 2019 , minimum future lease payments to be received for sales-type and direct financing leases are as follows: in millions Sales-type and direct financing lease payments 2019 $ 843 2020 928 2021 659 2022 435 2023 269 Thereafter 463 Total lease payments 3,597 At March 31, 2019 , minimum future lease payments to be received for operating leases are as follows: in millions Operating lease payments 2019 $ 97 2020 121 2021 103 2022 87 2023 73 Thereafter 217 Total lease payments $ 698 The carrying amount of operating lease assets at March 31, 2019 , was $961 million
Leases	9. Leases As a lessee, we enter into leases of land, buildings and equipment. Our real estate leases primarily relate to bank branches and office space. The leases of equipment principally relate to technology assets for data processing and data storage. As a lessor, we primarily provide financing through our equipment leasing business. Lessee Our leases are classified as either operating or financing and have remaining terms ranging from 1 to 20 years with the exception of certain ground leases that have terms over 30 years. Leases with an initial term of less than 1 year are not recorded on the balance sheet. The related expense is recognized on a straight-line basis over the lease term. For leases with initial terms greater than one year, right-of-use assets are reported on the balance sheet. Certain leases contain options to extend the lease term for up to five years . Most leases also give us the option to terminate at our discretion. Leases with variable payments are primarily based on adjustments for inflation over the term of the lease based on a contractually defined index. Certain ATM leases include variable payments based on volume of transactions. Operating lease expense is recognized in "net occupancy" and "equipment" on the statement of income. The components of lease expense are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Operating lease cost $ 34 Variable lease cost 5 Total lease cost $ 39 (a) The amortization of right-of-use assets and interest on lease liabilities for finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) Short-term lease cost was less than less than $1 million for the three months ended March 31, 2019 . Cash flows related to leases are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 36 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 28 (a) Operating and financing cash flows from finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) There were no right-of-use assets obtained in exchange for finance lease obligations for the three months ended March 31, 2019 . Additional balance sheet information related to leases is summarized as follows: March 31, in millions Balance sheet classification 2019 Operating lease assets Accrued income and other assets $ 694 Operating lease liabilities Accrued expense and other liabilities 787 Finance leases: Property and equipment, gross Premises and equipment 28 Accumulated depreciation Premises and equipment (16 ) Property and equipment, net 12 Finance lease liabilities Long-term debt 15 Information pertaining to the lease term and weighted-average discount rate is summarized as follows: March 31, 2019 Weighted-average remaining lease term: Operating leases 7.9 years Finance leases 7.6 years Weighted-average discount rate: Operating leases 3.28 % Finance leases 4.12 % Maturities of lease liabilities are summarized as follows: in millions Operating Leases Finance Leases Total 2019 $ 108 $ 2 $ 110 2020 139 3 142 2021 123 3 126 2022 108 3 111 2023 93 2 95 Thereafter 332 5 337 Total lease payments 903 18 921 Less imputed interest 116 3 119 Total $ 787 $ 15 $ 802 Lessor Equipment Leasing Leases may have fixed or floating rate terms. Variable payments are based on an index or other specified rate and are included in rental payments. Certain leases contain an option to extend the lease term or the option to terminate at the discretion of the lessee. Under certain conditions, lease agreements may also contain the option for a lessee to purchase the underlying asset. Interest income from sales-type and direct financing leases is recognized in "interest income — loans" on the statement of income. Income related to operating leases is recognized in “operating lease income and other leasing gains” on the statement of income. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2019 Sales-type and direct financing leases Interest income on lease receivable $ 30 Interest income related to accretion of unguaranteed residual asset 3 Interest income on deferred fees and costs — Total sales-type and direct financing lease income 33 Operating leases Operating lease income related to lease payments 33 Other operating leasing gains 4 Total operating lease income and other leasing gains 37 Total lease income $ 70 Equipment leasing receivables relate to sales-type and direct financing leases. The composition of the net investment in sales-type and direct financing leases is as follows: in millions March 31, 2019 Lease receivables $ 3,597 Unearned income (346 ) Unguaranteed residual value 428 Deferred fees and costs 17 Net investment in sales-type and direct financing leases $ 3,696 The residual value component of a lease represents the fair value of the leased asset at the end of the lease term. We rely on industry data, historical experience, independent appraisals and the experience of the equipment leasing asset management team to value lease residuals. Relationships with a number of equipment vendors give the asset management team insight into the life cycle of the leased equipment, pending product upgrades and competing products. The carrying amount of residual assets covered by residual value guarantees was $269 million at March 31, 2019 . At March 31, 2019 , minimum future lease payments to be received for sales-type and direct financing leases are as follows: in millions Sales-type and direct financing lease payments 2019 $ 843 2020 928 2021 659 2022 435 2023 269 Thereafter 463 Total lease payments 3,597 At March 31, 2019 , minimum future lease payments to be received for operating leases are as follows: in millions Operating lease payments 2019 $ 97 2020 121 2021 103 2022 87 2023 73 Thereafter 217 Total lease payments $ 698 The carrying amount of operating lease assets at March 31, 2019 , was $961 million
Leases	9. Leases As a lessee, we enter into leases of land, buildings and equipment. Our real estate leases primarily relate to bank branches and office space. The leases of equipment principally relate to technology assets for data processing and data storage. As a lessor, we primarily provide financing through our equipment leasing business. Lessee Our leases are classified as either operating or financing and have remaining terms ranging from 1 to 20 years with the exception of certain ground leases that have terms over 30 years. Leases with an initial term of less than 1 year are not recorded on the balance sheet. The related expense is recognized on a straight-line basis over the lease term. For leases with initial terms greater than one year, right-of-use assets are reported on the balance sheet. Certain leases contain options to extend the lease term for up to five years . Most leases also give us the option to terminate at our discretion. Leases with variable payments are primarily based on adjustments for inflation over the term of the lease based on a contractually defined index. Certain ATM leases include variable payments based on volume of transactions. Operating lease expense is recognized in "net occupancy" and "equipment" on the statement of income. The components of lease expense are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Operating lease cost $ 34 Variable lease cost 5 Total lease cost $ 39 (a) The amortization of right-of-use assets and interest on lease liabilities for finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) Short-term lease cost was less than less than $1 million for the three months ended March 31, 2019 . Cash flows related to leases are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 36 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 28 (a) Operating and financing cash flows from finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) There were no right-of-use assets obtained in exchange for finance lease obligations for the three months ended March 31, 2019 . Additional balance sheet information related to leases is summarized as follows: March 31, in millions Balance sheet classification 2019 Operating lease assets Accrued income and other assets $ 694 Operating lease liabilities Accrued expense and other liabilities 787 Finance leases: Property and equipment, gross Premises and equipment 28 Accumulated depreciation Premises and equipment (16 ) Property and equipment, net 12 Finance lease liabilities Long-term debt 15 Information pertaining to the lease term and weighted-average discount rate is summarized as follows: March 31, 2019 Weighted-average remaining lease term: Operating leases 7.9 years Finance leases 7.6 years Weighted-average discount rate: Operating leases 3.28 % Finance leases 4.12 % Maturities of lease liabilities are summarized as follows: in millions Operating Leases Finance Leases Total 2019 $ 108 $ 2 $ 110 2020 139 3 142 2021 123 3 126 2022 108 3 111 2023 93 2 95 Thereafter 332 5 337 Total lease payments 903 18 921 Less imputed interest 116 3 119 Total $ 787 $ 15 $ 802 Lessor Equipment Leasing Leases may have fixed or floating rate terms. Variable payments are based on an index or other specified rate and are included in rental payments. Certain leases contain an option to extend the lease term or the option to terminate at the discretion of the lessee. Under certain conditions, lease agreements may also contain the option for a lessee to purchase the underlying asset. Interest income from sales-type and direct financing leases is recognized in "interest income — loans" on the statement of income. Income related to operating leases is recognized in “operating lease income and other leasing gains” on the statement of income. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2019 Sales-type and direct financing leases Interest income on lease receivable $ 30 Interest income related to accretion of unguaranteed residual asset 3 Interest income on deferred fees and costs — Total sales-type and direct financing lease income 33 Operating leases Operating lease income related to lease payments 33 Other operating leasing gains 4 Total operating lease income and other leasing gains 37 Total lease income $ 70 Equipment leasing receivables relate to sales-type and direct financing leases. The composition of the net investment in sales-type and direct financing leases is as follows: in millions March 31, 2019 Lease receivables $ 3,597 Unearned income (346 ) Unguaranteed residual value 428 Deferred fees and costs 17 Net investment in sales-type and direct financing leases $ 3,696 The residual value component of a lease represents the fair value of the leased asset at the end of the lease term. We rely on industry data, historical experience, independent appraisals and the experience of the equipment leasing asset management team to value lease residuals. Relationships with a number of equipment vendors give the asset management team insight into the life cycle of the leased equipment, pending product upgrades and competing products. The carrying amount of residual assets covered by residual value guarantees was $269 million at March 31, 2019 . At March 31, 2019 , minimum future lease payments to be received for sales-type and direct financing leases are as follows: in millions Sales-type and direct financing lease payments 2019 $ 843 2020 928 2021 659 2022 435 2023 269 Thereafter 463 Total lease payments 3,597 At March 31, 2019 , minimum future lease payments to be received for operating leases are as follows: in millions Operating lease payments 2019 $ 97 2020 121 2021 103 2022 87 2023 73 Thereafter 217 Total lease payments $ 698 The carrying amount of operating lease assets at March 31, 2019 , was $961 million
Leases	9. Leases As a lessee, we enter into leases of land, buildings and equipment. Our real estate leases primarily relate to bank branches and office space. The leases of equipment principally relate to technology assets for data processing and data storage. As a lessor, we primarily provide financing through our equipment leasing business. Lessee Our leases are classified as either operating or financing and have remaining terms ranging from 1 to 20 years with the exception of certain ground leases that have terms over 30 years. Leases with an initial term of less than 1 year are not recorded on the balance sheet. The related expense is recognized on a straight-line basis over the lease term. For leases with initial terms greater than one year, right-of-use assets are reported on the balance sheet. Certain leases contain options to extend the lease term for up to five years . Most leases also give us the option to terminate at our discretion. Leases with variable payments are primarily based on adjustments for inflation over the term of the lease based on a contractually defined index. Certain ATM leases include variable payments based on volume of transactions. Operating lease expense is recognized in "net occupancy" and "equipment" on the statement of income. The components of lease expense are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Operating lease cost $ 34 Variable lease cost 5 Total lease cost $ 39 (a) The amortization of right-of-use assets and interest on lease liabilities for finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) Short-term lease cost was less than less than $1 million for the three months ended March 31, 2019 . Cash flows related to leases are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 36 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 28 (a) Operating and financing cash flows from finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) There were no right-of-use assets obtained in exchange for finance lease obligations for the three months ended March 31, 2019 . Additional balance sheet information related to leases is summarized as follows: March 31, in millions Balance sheet classification 2019 Operating lease assets Accrued income and other assets $ 694 Operating lease liabilities Accrued expense and other liabilities 787 Finance leases: Property and equipment, gross Premises and equipment 28 Accumulated depreciation Premises and equipment (16 ) Property and equipment, net 12 Finance lease liabilities Long-term debt 15 Information pertaining to the lease term and weighted-average discount rate is summarized as follows: March 31, 2019 Weighted-average remaining lease term: Operating leases 7.9 years Finance leases 7.6 years Weighted-average discount rate: Operating leases 3.28 % Finance leases 4.12 % Maturities of lease liabilities are summarized as follows: in millions Operating Leases Finance Leases Total 2019 $ 108 $ 2 $ 110 2020 139 3 142 2021 123 3 126 2022 108 3 111 2023 93 2 95 Thereafter 332 5 337 Total lease payments 903 18 921 Less imputed interest 116 3 119 Total $ 787 $ 15 $ 802 Lessor Equipment Leasing Leases may have fixed or floating rate terms. Variable payments are based on an index or other specified rate and are included in rental payments. Certain leases contain an option to extend the lease term or the option to terminate at the discretion of the lessee. Under certain conditions, lease agreements may also contain the option for a lessee to purchase the underlying asset. Interest income from sales-type and direct financing leases is recognized in "interest income — loans" on the statement of income. Income related to operating leases is recognized in “operating lease income and other leasing gains” on the statement of income. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2019 Sales-type and direct financing leases Interest income on lease receivable $ 30 Interest income related to accretion of unguaranteed residual asset 3 Interest income on deferred fees and costs — Total sales-type and direct financing lease income 33 Operating leases Operating lease income related to lease payments 33 Other operating leasing gains 4 Total operating lease income and other leasing gains 37 Total lease income $ 70 Equipment leasing receivables relate to sales-type and direct financing leases. The composition of the net investment in sales-type and direct financing leases is as follows: in millions March 31, 2019 Lease receivables $ 3,597 Unearned income (346 ) Unguaranteed residual value 428 Deferred fees and costs 17 Net investment in sales-type and direct financing leases $ 3,696 The residual value component of a lease represents the fair value of the leased asset at the end of the lease term. We rely on industry data, historical experience, independent appraisals and the experience of the equipment leasing asset management team to value lease residuals. Relationships with a number of equipment vendors give the asset management team insight into the life cycle of the leased equipment, pending product upgrades and competing products. The carrying amount of residual assets covered by residual value guarantees was $269 million at March 31, 2019 . At March 31, 2019 , minimum future lease payments to be received for sales-type and direct financing leases are as follows: in millions Sales-type and direct financing lease payments 2019 $ 843 2020 928 2021 659 2022 435 2023 269 Thereafter 463 Total lease payments 3,597 At March 31, 2019 , minimum future lease payments to be received for operating leases are as follows: in millions Operating lease payments 2019 $ 97 2020 121 2021 103 2022 87 2023 73 Thereafter 217 Total lease payments $ 698 The carrying amount of operating lease assets at March 31, 2019 , was $961 million
Leases	9. Leases As a lessee, we enter into leases of land, buildings and equipment. Our real estate leases primarily relate to bank branches and office space. The leases of equipment principally relate to technology assets for data processing and data storage. As a lessor, we primarily provide financing through our equipment leasing business. Lessee Our leases are classified as either operating or financing and have remaining terms ranging from 1 to 20 years with the exception of certain ground leases that have terms over 30 years. Leases with an initial term of less than 1 year are not recorded on the balance sheet. The related expense is recognized on a straight-line basis over the lease term. For leases with initial terms greater than one year, right-of-use assets are reported on the balance sheet. Certain leases contain options to extend the lease term for up to five years . Most leases also give us the option to terminate at our discretion. Leases with variable payments are primarily based on adjustments for inflation over the term of the lease based on a contractually defined index. Certain ATM leases include variable payments based on volume of transactions. Operating lease expense is recognized in "net occupancy" and "equipment" on the statement of income. The components of lease expense are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Operating lease cost $ 34 Variable lease cost 5 Total lease cost $ 39 (a) The amortization of right-of-use assets and interest on lease liabilities for finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) Short-term lease cost was less than less than $1 million for the three months ended March 31, 2019 . Cash flows related to leases are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 36 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 28 (a) Operating and financing cash flows from finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) There were no right-of-use assets obtained in exchange for finance lease obligations for the three months ended March 31, 2019 . Additional balance sheet information related to leases is summarized as follows: March 31, in millions Balance sheet classification 2019 Operating lease assets Accrued income and other assets $ 694 Operating lease liabilities Accrued expense and other liabilities 787 Finance leases: Property and equipment, gross Premises and equipment 28 Accumulated depreciation Premises and equipment (16 ) Property and equipment, net 12 Finance lease liabilities Long-term debt 15 Information pertaining to the lease term and weighted-average discount rate is summarized as follows: March 31, 2019 Weighted-average remaining lease term: Operating leases 7.9 years Finance leases 7.6 years Weighted-average discount rate: Operating leases 3.28 % Finance leases 4.12 % Maturities of lease liabilities are summarized as follows: in millions Operating Leases Finance Leases Total 2019 $ 108 $ 2 $ 110 2020 139 3 142 2021 123 3 126 2022 108 3 111 2023 93 2 95 Thereafter 332 5 337 Total lease payments 903 18 921 Less imputed interest 116 3 119 Total $ 787 $ 15 $ 802 Lessor Equipment Leasing Leases may have fixed or floating rate terms. Variable payments are based on an index or other specified rate and are included in rental payments. Certain leases contain an option to extend the lease term or the option to terminate at the discretion of the lessee. Under certain conditions, lease agreements may also contain the option for a lessee to purchase the underlying asset. Interest income from sales-type and direct financing leases is recognized in "interest income — loans" on the statement of income. Income related to operating leases is recognized in “operating lease income and other leasing gains” on the statement of income. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2019 Sales-type and direct financing leases Interest income on lease receivable $ 30 Interest income related to accretion of unguaranteed residual asset 3 Interest income on deferred fees and costs — Total sales-type and direct financing lease income 33 Operating leases Operating lease income related to lease payments 33 Other operating leasing gains 4 Total operating lease income and other leasing gains 37 Total lease income $ 70 Equipment leasing receivables relate to sales-type and direct financing leases. The composition of the net investment in sales-type and direct financing leases is as follows: in millions March 31, 2019 Lease receivables $ 3,597 Unearned income (346 ) Unguaranteed residual value 428 Deferred fees and costs 17 Net investment in sales-type and direct financing leases $ 3,696 The residual value component of a lease represents the fair value of the leased asset at the end of the lease term. We rely on industry data, historical experience, independent appraisals and the experience of the equipment leasing asset management team to value lease residuals. Relationships with a number of equipment vendors give the asset management team insight into the life cycle of the leased equipment, pending product upgrades and competing products. The carrying amount of residual assets covered by residual value guarantees was $269 million at March 31, 2019 . At March 31, 2019 , minimum future lease payments to be received for sales-type and direct financing leases are as follows: in millions Sales-type and direct financing lease payments 2019 $ 843 2020 928 2021 659 2022 435 2023 269 Thereafter 463 Total lease payments 3,597 At March 31, 2019 , minimum future lease payments to be received for operating leases are as follows: in millions Operating lease payments 2019 $ 97 2020 121 2021 103 2022 87 2023 73 Thereafter 217 Total lease payments $ 698 The carrying amount of operating lease assets at March 31, 2019 , was $961 million

Variable Interest Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities	10. Variable Interest Entities Our significant VIEs are summarized below. Additional information pertaining to the criteria used in determining if an entity is a VIE is included in Note 12 (“ Variable Interest Entities “) beginning on page 142 of our 2018 Form 10-K. LIHTC investments. We had $1.4 billion and $1.4 billion of investments in LIHTC operating partnerships at March 31, 2019 , and December 31, 2018 , respectively. These investments are recorded in “accrued income and other assets” on our balance sheet. We do not have any loss reserves recorded related to these investments because we believe the likelihood of any loss to be remote. For all legally binding, unfunded equity commitments, we increase our recognized investment and recognize a liability. As of March 31, 2019 , and December 31, 2018 , we had liabilities of $499 million and $532 million , respectively, related to investments in qualified affordable housing projects, which are recorded in “accrued expenses and other liabilities” on our balance sheet. We continue to invest in these LIHTC operating partnerships. The assets and liabilities presented in the table below convey the size of KCDC’s direct and indirect investments at March 31, 2019 , and December 31, 2018 . As these investments represent unconsolidated VIEs, the assets and liabilities of the investments themselves are not recorded on our balance sheet. Additional information pertaining to our LIHTC investments is included in Note 12 (“ Variable Interest Entities “) beginning on page 142 of our 2018 Form 10-K. Unconsolidated VIEs in millions Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2019 LIHTC investments $ 5,948 $ 2,568 $ 1,715 December 31, 2018 LIHTC investments $ 5,932 $ 2,569 $ 1,740 We amortize our LIHTC investments over the period that we expect to receive the tax benefits. During the first three months of 2019 , we recognized $46 million of amortization and $45 million of tax credits associated with these investments within “income taxes” on our income statement. During the first three months of 2018 , we recognized $41 million of amortization and $40 million of tax credits associated with these investments within “income taxes” on our income statement. Principal investments. Our maximum exposure to loss associated with indirect principal investments consists of the investments’ fair value plus any unfunded equity commitments. The fair value of our indirect principal investments totaled $83 million and $96 million at March 31, 2019 , and December 31, 2018 , respectively. These investments are recorded in “other investments” on our balance sheet. The table below reflects the size of the private equity funds in which we were invested as well as our maximum exposure to loss in connection with these investments at March 31, 2019 , and December 31, 2018 . Unconsolidated VIEs in millions Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2019 Indirect investments $ 16,285 $ 299 $ 108 December 31, 2018 Indirect investments $ 19,659 $ 376 $ 122 Through our principal investing entities, we have formed and funded operating entities that provide management and other related services to our investment company funds, which directly invest in portfolio companies. These entities had no assets at March 31, 2019 , and December 31, 2018 that can only be used to settle the entities’ obligations. The entities had no liabilities at March 31, 2019 , and December 31, 2018 , and other equity investors have no recourse to our general credit. Additional information on our indirect and direct principal investments is provided in Note 5 (“ Fair Value Measurements ”) and in Note 12 (“ Variable Interest Entities “) beginning on page 142 of our 2018 Form 10-K. Other unconsolidated VIEs. We are involved with other various entities in the normal course of business which we have determined to be VIEs. We have determined that we are not the primary beneficiary of these VIEs because we do not have the power to direct the activities that most significantly impact their economic performance. Our assets associated with these unconsolidated VIEs totaled $269 million at March 31, 2019 , and $248 million at December 31, 2018 . These assets are recorded in “accrued income and other assets,” “other investments,” “securities available for sale,” and “loans, net of unearned income” on our balance sheet. We had liabilities totaling $2 million and $2 million associated with these unconsolidated VIEs at March 31, 2019 , and December 31, 2018 , respectively. Additional information pertaining to our other unconsolidated VIEs is included in Note 12 (“ Variable Interest Entities

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income Taxes	11. 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 before income taxes, was 17.0% for the first quarter of 2019 and 12.9% for the first quarter of 2018 . The effective tax rates are less than our combined federal and state statutory tax rate of 23.7% , primarily due to income from investments in tax-advantaged assets such as corporate-owned life insurance and credits associated with renewable energy and low-income housing investments. The effective tax rates for the three months ended March 31, 2019 , and March 31, 2018 , were affected by a net discrete income tax benefit of .9% and 5.5% , respectively. Deferred Tax Asset At March 31, 2019 , we had a net deferred tax asset of $24 million , compared to a net deferred tax asset of $222 million at December 31, 2018 , 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 $11 million at March 31, 2019 , and $11 million at December 31, 2018 . The valuation allowance is associated with certain state net operating loss carryforwards, state credit carryforwards, and federal and state capital loss 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.” At March 31, 2019 , Key’s unrecognized tax benefits were $36 million . Pre-1988 Bank Reserves Acquired in a Business Combination Retained earnings of KeyBank included approximately $92 million

Acquisition, Divestiture, and D

Acquisition, Divestiture, and Discontinued Operations	3 Months Ended
	Mar. 31, 2019
Business Combinations [Abstract]
Acquisition, Divestiture, and Discontinued Operations	12. Acquisitions, Divestiture, and Discontinued Operations Acquisitions Laurel Road Digital Lending Business. On January 16, 2019, we announced that KeyBank entered into a definitive agreement with Laurel Road Bank to acquire Laurel Road's digital lending business. Laurel Road's three bank branches located in southeast Connecticut are not part of this transaction. Through the acquisition, KeyBank expects to enhance its digital capabilities with state-of-the-art, customer-centric technology and to leverage Laurel Road's proven ability to attract and serve professional millennial clients. The acquisition, which will be accounted for as a business combination, closed on April 3, 2019. Accordingly, we will begin consolidating Laurel Road’s financial results in our consolidated financial statements in the second quarter of 2019. Divestiture Key Insurance & Benefits Services, Inc. On March 29, 2018, we announced that we had entered into a definitive agreement to sell KIBS to USI Insurance Services. We acquired KIBS as a part of the 2016 merger with First Niagara. We completed the sale to USI Insurance Services on May 4, 2018. At the close of the sale, we recognized a $73 million net gain on sale. In the third quarter of 2018, we recognized an additional $5 million gain upon the finalization of the purchase price. Discontinued operations Discontinued operations primarily includes our government-guaranteed education lending business. At March 31, 2019 , and December 31, 2018 , approximately $1.0 billion and $1.1 billion

Securities Financing Activities

Securities Financing Activities	3 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
Securities Financing Activities	13. Securities Financing Activities We enter into repurchase agreements to finance overnight customer sweep deposits. We also enter into repurchase and reverse repurchase agreements 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 for which 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. Reverse repurchase agreements and securities borrowed transactions are included in “short-term investments” on the balance sheet; repurchase agreements are included in “federal funds purchased and securities sold under repurchase agreements.” Additional information regarding our securities financing activities, including risk management activities, is provided in Note 16 (“ Securities Financing Activities ”) beginning on page 148 of our 2018 Form 10-K. The following table summarizes our securities financing agreements at March 31, 2019 , and December 31, 2018 : March 31, 2019 December 31, 2018 in millions Gross Amount Presented in Balance Sheet Netting Adjustments (a) Collateral (b) Net Amounts Gross Amount Presented in Balance Sheet Netting Adjustments (a) Collateral (b) Net Amounts Offsetting of financial assets: Reverse repurchase agreements $ 12 $ (5 ) $ (7 ) — $ 14 $ (14 ) — — Total $ 12 $ (5 ) $ (7 ) — $ 14 $ (14 ) — — Offsetting of financial liabilities: Repurchase agreements (c) $ 266 $ (5 ) $ (261 ) — $ 319 $ (14 ) $ (305 ) — Total $ 266 $ (5 ) $ (261 ) — $ 319 $ (14 ) $ (305 ) — (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 mortgaged-backed agency securities and are contracted on an overnight or continuous basis. As of March 31, 2019 , the carrying amount of assets pledged as collateral against repurchase agreements totaled $370 million . Assets pledged as collateral are reported in “securities available for sale” and “held-to-maturity securities” on our balance sheet. At March 31, 2019 , the liabilities associated with collateral pledged were solely comprised of customer sweep financing activity and had a carrying value of $261 million

Employee Benefits

Employee Benefits	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Employee Benefits	14. Employee Benefits Pension Plans The components of net pension cost (benefit) for all funded and unfunded plans are recorded in “other expense” and are summarized in the following table. For more information on our Pension Plans and Other Postretirement Benefit Plans, see Note 17 (“ Employee Benefits ”) beginning on page 151 of our 2018 Form 10-K. Three months ended March 31, in millions 2019 2018 Interest cost on PBO $ 11 $ 10 Expected return on plan assets (12 ) (13 ) Amortization of losses 4 4 Net pension cost $ 3 $ 1

Trust Preferred Securities Issu

Trust Preferred Securities Issued by Unconsolidated Subsidiaries	3 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
Trust Preferred Securities Issued by Unconsolidated Subsidiaries	15. 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. The outstanding common stock of these business trusts is recorded in “other investments” on our balance sheet. 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, require us to treat our mandatorily redeemable trust preferred securities as Tier 2 capital. The trust preferred securities, common stock, and related debentures are summarized as follows: dollars in millions Trust Preferred Securities, Net of Discount (a) Common Stock Principal Amount of Debentures, Net of Discount (b) Interest Rate of Trust Preferred Securities and Debentures (c) Maturity of Trust Preferred Securities and Debentures March 31, 2019 KeyCorp Capital I $ 156 $ 6 $ 162 3.537 % 2028 KeyCorp Capital II 102 4 106 6.875 2029 KeyCorp Capital III 134 4 138 7.750 2029 HNC Statutory Trust III 19 1 20 4.051 2035 Willow Grove Statutory Trust I 18 1 19 3.921 2036 HNC Statutory Trust IV 16 1 17 4.031 2037 Westbank Capital Trust II 7 — 7 4.823 2034 Westbank Capital Trust III 7 — 7 4.823 2034 Total $ 459 $ 17 $ 476 5.604 % — December 31, 2018 $ 454 $ 17 $ 471 5.447 % — (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 $51 million at March 31, 2019 , and $46 million at December 31, 2018 . 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, HNC Statutory Trust III, Willow Grove Statutory Trust I, HNC Statutory Trust IV, Westbank Capital Trust II, or Westbank Capital Trust III 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 $51 million at March 31, 2019 , and $46 million at December 31, 2018 . See Note 7 (“ Derivatives and Hedging Activities ”) 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)

Contingent Liabilities and Guar

Contingent Liabilities and Guarantees	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingent Liabilities and Guarantees	16. Contingent Liabilities and Guarantees Legal Proceedings Litigation. From time to time, in the ordinary course of business, we and our subsidiaries are subject to various litigation, investigations, and administrative proceedings. Private, civil litigations may range from individual actions involving a single plaintiff to putative class action lawsuits with potentially thousands of class members. Investigations may involve both formal and informal proceedings, by both government agencies and self-regulatory bodies. These matters may involve claims for substantial monetary relief. At times, these matters may present novel claims or legal theories. Due to the complex nature of these various other matters, it may be years before some matters are resolved. While it is impossible to ascertain the ultimate resolution or range of financial liability, based on information presently known to us, we do not believe there is any matter to which we are a party, or involving any of our properties that, individually or in the aggregate, would reasonably be expected to have a material adverse effect on our financial condition. We continually monitor and reassess the potential materiality of these litigation matters. We note, however, that in light of the inherent uncertainty in legal proceedings there can be no assurance that the ultimate resolution will not exceed established reserves. As a result, the outcome of a particular matter, or a combination of matters, may be material to our results of operations for a particular period, depending upon the size of the loss or our income for that particular period. Guarantees We are a guarantor in various agreements with third parties. The following table shows the types of guarantees that we had outstanding at March 31, 2019 . 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 106 of our 2018 Form 10-K. March 31, 2019 Maximum Potential Undiscounted Future Payments Liability Recorded in millions Financial guarantees: Standby letters of credit $ 3,112 $ 76 Recourse agreement with FNMA 4,185 6 Residential mortgage reserve 1,576 6 Written put options (a) 3,065 46 Total $ 11,938 $ 134 (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 March 31, 2019 , is low. Information pertaining to the nature of each of the guarantees listed below is included in Note 21 (“ Commitments, Contingent Liabilities, and Guarantees ”) under the heading “Guarantees” beginning on page 163 of our 2018 Form 10-K. Standby letters of credit. At March 31, 2019 , our standby letters of credit had a remaining weighted-average life of two years , with remaining actual lives ranging from less than one year to as many as 16 years . Recourse agreement with FNMA. At March 31, 2019 , the outstanding commercial mortgage loans in this program had a weighted-average remaining term of 7.8 years , and the unpaid principal balance outstanding of loans sold by us as a participant was $14.5 billion . The maximum potential amount of undiscounted future payments that we could be required to make under this program, as shown in the preceding table, is equal to approximately 29% of the principal balance of loans outstanding at March 31, 2019 . Residential Mortgage Banking. At March 31, 2019 , the outstanding residential mortgage loans in this program had a weighted-average LTV ratio of 74% , and the unpaid principal balance outstanding of loans sold by us was $5.3 billion . The risk assessment is low for the residential mortgage product. The maximum potential amount of undiscounted future payments that we could be required to make under this program, as shown in the preceding table, is equal to approximately 30% of the principal balance of loans outstanding at March 31, 2019 . Our liability for estimated repurchase obligations on loans sold, which is included in other liabilities on our balance sheet, was $6 million at March 31, 2019 . For more information on our residential mortgages, see Note 8 (“ Mortgage Servicing Assets “). Written put options. At March 31, 2019 , our written put options had an average life of three years . These written put options are accounted for as derivatives at fair value, as further discussed in Note 7 (“ Derivatives and Hedging Activities ”). 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 (“ Derivatives and Hedging Activities ”). 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. Additional information pertaining to types other off-balance sheet risk is included in Note 21 (“ Commitments, Contingent Liabilities, and Guarantees ”) under the heading “Other Off-Balance Sheet Risk” on page 165 of our 2018

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Accumulated Other Comprehensive Income	17. Accumulated Other Comprehensive Income Our changes in AOCI for the three months ended March 31, 2019 , and March 31, 2018 , are as follows: in millions Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative financial instruments Foreign currency translation adjustment Net pension and postretirement benefit costs Total Balance at December 31, 2018 $ (373 ) $ (50 ) $ (14 ) $ (381 ) $ (818 ) Other comprehensive income before reclassification, net of income taxes 184 80 3 (1 ) 266 Amounts reclassified from AOCI, net of income taxes (a) — 19 — 3 22 Net current-period other comprehensive income, net of income taxes 184 99 3 2 288 Balance at March 31, 2019 $ (189 ) $ 49 $ (11 ) $ (379 ) $ (530 ) Balance at December 31, 2017 $ (311 ) $ (86 ) $ 9 $ (391 ) $ (779 ) Other comprehensive income before reclassification, net of income taxes (150 ) (65 ) (2 ) — (217 ) Amounts reclassified from AOCI, net of income taxes (a) — 2 — 3 5 Net current-period other comprehensive income, net of income taxes (150 ) (63 ) (2 ) 3 (212 ) Balance at March 31, 2018 $ (461 ) $ (149 ) $ 7 $ (388 ) $ (991 ) (a) See table below for details about these reclassifications. Our reclassifications out of AOCI for the three months ended March 31, 2019 , and March 31, 2018 , are as follows: Three months ended March 31, Affected Line Item in the Statement Where Net Income is Presented in millions 2019 2018 Unrealized gains (losses) on derivative financial instruments Interest rate $ (24 ) $ (2 ) Interest income — Loans Interest rate (1 ) (1 ) Interest expense — Long-term debt (25 ) (3 ) Income (loss) from continuing operations before income taxes (6 ) (1 ) Income taxes $ (19 ) $ (2 ) Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (4 ) $ (4 ) Personnel expense (4 ) (4 ) Income (loss) from continuing operations before income taxes (1 ) (1 ) Income taxes $ (3 ) $ (3 ) Income (loss) from continuing operations

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Shareholder' Equity	18. Shareholders' Equity Comprehensive Capital Plan As previously reported and as authorized by the Board and pursuant to our 2018 capital plan (which is effective through the second quarter of 2019) submitted and not objected to by the Federal Reserve, we have authority to repurchase up to $1.225 billion of our Common Shares. We completed $199 million of Common Share repurchases, including $167 million of Common Share repurchases in the open market and $32 million of Common Share repurchases related to employee equity compensation programs, in the first quarter of 2019 under this authorization. Consistent with our 2018 capital plan, the Board declared a quarterly dividend of $.17 per Common Share for the first quarter of 2019 . On April 18, 2019, we announced our 2019 capital plan. Share repurchases of up to $1.0 billion were included in the 2019 capital plan which is effective from the third quarter of 2019 through the second quarter of 2020. A potential dividend increase was also included in our 2019 capital plan. In the third quarter of 2019, the Board plans to consider a potential increase in our quarterly Common Share dividend, up to $.185 per Common Share. Preferred Stock Preferred stock series Amount outstanding (in millions) Shares authorized and outstanding Par value Liquidation preference Ownership interest per depositary share Liquidation preference per depositary share First quarter 2019 dividends paid per depositary share Fixed-to-Floating Rate Perpetual Noncumulative Series D $ 525 21,000 $ 1 $ 25,000 1/25th $ 1,000 $ 12.50 Fixed-to-Floating Rate Perpetual Noncumulative Series E 500 500,000 1 1,000 1/40th 25 .382813 Fixed Rate Perpetual Noncumulative Series F 425 425,000 1 1,000 1/40th 25 .353125 On April 29, 2019, we issued $450 million of depositary shares, each representing a 1/40th ownership interest in a share of our Fixed Rate Perpetual Non-Cumulative Series G Preferred Stock. Our Series G Preferred Stock has a $1 par value with a $1,000 liquidation preference (equivalent to $25

Business Segment Reporting

Business Segment Reporting	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Business Segment Reporting	19. Business Segment Reporting Key previously reported its results of operations through two reportable business segments, Key Community Bank and Key Corporate Bank. In the first quarter of 2019, Key underwent a company-wide organizational change, resulting in the realignment of its businesses into two reportable business segments, Consumer Bank and Commercial Bank, with the remaining operations that do not meet the criteria for disclosure as a separate reportable business recorded in Other. The new business segment structure aligns with how management reviews performance and makes decisions by client, segment and business unit. Prior period information was restated to conform to the new business segment structure. Additionally, goodwill was reallocated to the new segments on a relative fair value basis. On March 31, 2019, the Consumer Bank was allocated goodwill in the amount of $1.6 billion and the Commercial Bank was allocated goodwill in the amount of $912 million . The following is a description of the segments and their primary businesses at March 31, 2019. Consumer Bank The Consumer Bank serves individuals and small businesses throughout our 15 -state branch footprint by offering a variety of deposit and investment products, personal finance and financial wellness services, lending, mortgage and home equity, credit card, treasury services, and business advisory services. The Consumer Bank also purchases retail auto sales contracts via a network of auto dealerships. The auto dealerships finance the sale of automobiles as the initial lender and then assign the contracts to us pursuant to dealer agreements. In addition, wealth management and investment services are offered to assist institutional, non-profit, and high-net-worth clients with their banking, trust, portfolio management, life insurance, charitable giving, and related needs. Commercial Bank The Commercial Bank is an aggregation of our Institutional and Commercial operating segments. The Commercial operating segment is a full-service corporate 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. The Commercial operating segment is also a significant servicer of commercial mortgage loans and a significant special servicer of CMBS. The Institutional operating segment delivers a broad 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. Other Other includes various corporate treasury activities such as management of our investment securities portfolio, long-term debt, short-term liquidity and funding activities, and balance sheet risk management, our principal investing unit, and various exit portfolios as well as reconciling items which primarily represents 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 include intercompany eliminations and certain items that are not allocated to the business segments because they do not reflect their normal operations. The development and application of the methodologies that we use to allocate items among our business segments is a dynamic process. Accordingly, financial results may be revised periodically to reflect enhanced alignment of expense base allocations drivers, changes in the risk profile of a particular business, or changes in our organizational structure. The table below shows selected financial data for our business segments for the three- month periods ended March 31, 2019 , and March 31, 2018 . Three months ended March 31, Consumer Bank Commercial Bank Other Total Key dollars in millions 2019 2018 2019 2018 2019 2018 2019 2018 SUMMARY OF OPERATIONS Net interest income (TE) $ 594 $ 553 $ 399 $ 405 $ (8 ) $ (6 ) $ 985 $ 952 Noninterest income 214 229 300 325 22 47 536 601 Total revenue (TE) (a) 808 782 699 730 14 41 1,521 1,553 Provision for credit losses 45 34 15 28 2 (1 ) 62 61 Depreciation and amortization expense 23 27 29 35 36 41 88 103 Other noninterest expense 524 549 338 346 13 8 875 903 Income (loss) from continuing operations before income taxes (TE) 216 172 317 321 (37 ) (7 ) 496 486 Allocated income taxes and TE adjustments 52 41 64 45 (26 ) (16 ) 90 70 Income (loss) from continuing operations 164 131 253 276 (11 ) 9 406 416 Income (loss) from discontinued operations, net of taxes — — — — 1 2 1 2 Net income (loss) 164 131 253 276 (10 ) 11 407 418 Less: Net income (loss) attributable to noncontrolling interests — — — — — — — — Net income (loss) attributable to Key $ 164 $ 131 $ 253 $ 276 $ (10 ) $ 11 $ 407 $ 418 AVERAGE BALANCES (b) Loans and leases $ 31,403 $ 31,647 $ 57,210 $ 54,131 $ 1,036 $ 1,149 $ 89,649 $ 86,927 Total assets (a) 34,814 34,802 64,817 61,750 40,489 38,363 140,120 134,915 Deposits 71,289 67,421 34,418 32,794 1,869 2,341 107,576 102,556 OTHER FINANCIAL DATA Net loan charge-offs (b) $ 34 $ 35 $ 30 $ 19 — — $ 64 $ 54 Return on average allocated equity (b) 19.83 % 16.41 % 23.66 % 25.31 % (.56 )% .50 % 10.49 % 11.33 % Return on average allocated equity 19.83 16.41 23.66 25.31 (.51 ) .62 10.51 11.39 Average full-time equivalent employees (c) 9,631 10,106 2,360 2,457 5,563 5,977 17,554 18,540 (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)

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	20. Revenue from Contracts with Customers The following table represents a disaggregation of revenue from contracts with customers, by business segment, for the three- month periods ended March 31, 2019 , and March 31, 2018 . Refer to Note 19 (“ Business Segment Reporting ”) for a description of the company-wide organizational change which occurred in the first quarter of 2019 resulting in the realignment of Key’s businesses into two reportable business segments, Consumer Bank and Commercial Bank. Prior period information was restated to conform to the new business segment structure. Three months ended March 31, 2019 Three months ended March 31, 2018 dollars in millions Consumer Bank Commercial Bank Total Contract Revenue Consumer Bank Commercial Bank Total Contract Revenue NONINTEREST INCOME Trust and investment services income $ 85 $ 15 $ 100 $ 99 $ 20 $ 119 Investment banking and debt placement fees — 45 45 — 47 47 Services charges on deposit accounts 60 27 87 61 28 89 Cards and payments income 38 26 64 34 26 60 Other noninterest income 3 — 3 5 — 5 Total revenue from contracts with customers $ 186 $ 113 $ 299 $ 199 $ 121 $ 320 Other noninterest income (a) $ 215 $ 234 Noninterest income from Other (b) 22 47 Total noninterest income $ 536 $ 601 (a) Noninterest income considered earned outside the scope of contracts with customers. (b) Other includes other segments that consists of corporate treasury, our principal investing unit, and various exit portfolios as well as reconciling items which primarily represents 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. Refer to Note 19 (“ Business Segment Reporting ”) for more information. We had no material contract assets or contract liabilities as of March 31, 2019 , and March 31, 2018 .

Basis of Presentation and Acc_2

Basis of Presentation and Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation	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 affect 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 10 (“ 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% are carried at the cost measurement alternative or at fair value. 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 2018
Subsequent Events	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.
Accounting Guidance Adopted and Pending Adoption	Standard Date of Adoption Description Effect on Financial Statements or Other Significant Matters ASU 2016-02, Leases (Topic 842) ASU 2018-01, Leases (Topic 842): Land Easement Practical Expedient ASU 2018-10, Codification Improvements to Topic 842 ASU 2018-11, Leases (Topic 842): Targeted Improvements ASU 2018-20, Leases (Topic 842): Narrow Scope Improvements for Lessors ASU 2019-01, Codification Improvements to Topic 842 January 1, 2019 The ASUs create and amend ASC Topic 842, Leases , and supersede Topic 840, Leases. The new guidance requires that a lessee recognize assets and liabilities for leases with lease terms of more than 12 months. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. Leveraged leases that commenced before the effective date of the new guidance are grandfathered. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee primarily will depend on its classification as a finance or operating lease. However, both types of leases are required to be recognized on the balance sheet. ASC 842 requires enhanced disclosures to better understand the amount, timing, and uncertainty of cash flows arising from leases. Qualitative and quantitative disclosures are required to provide additional information about the amounts recorded in the financial statements. Although substantially unchanged, certain amendments provide clarifications related to lessor accounting. The guidance should be implemented using a modified retrospective approach. However, entities may choose to measure and present the changes at the beginning of the earliest period presented or to reflect the changes as of the adoption date. Key adopted this guidance on January 1, 2019, using the package of practical expedients, which allowed Key to maintain historic lease identification and classification, and permitted Key not to reassess initial direct costs under the new guidance. Key also elected the practical expedient on not separating lease components from nonlease components for all of its leases. Adoption resulted in an increase in right-of-use assets and associated lease liabilities arising from operating leases in which Key is the lessee of approximately $710 million on our Consolidated Balance Sheets at January 1, 2019. Right of use assets, lease liabilities, and other changes as a result of adoption are not reflected in comparable periods presented prior to that date. The adoption of this guidance did not have a material impact on the recognition of operating lease expense in our Consolidated Statements of Income. The amount of the right-of-use assets and associated lease liabilities recorded at adoption was based on the present value of unpaid future minimum lease payments. These payments were discounted using Key’s incremental borrowing rate, consistent with what Key would pay to borrow on a collateralized basis over a term similar to each lease. For more information, please see Note 9 (“Leases”). ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities January 1, 2019 The ASU amends ASC Topic 310-20, Receivables — Nonrefundable Fees and Other Costs , and shortens the amortization period to the earliest call date for certain callable debt securities held at a premium. Securities held at a discount will continue to be amortized to maturity. The guidance should be implemented on a modified retrospective basis using a cumulative-effect adjustment. The adoption of this guidance did not have a material effect on our financial condition or results of operations. ASU 2018-07, Stock Compensation - Improvements to Nonemployee Share-Based Payment Accounting January 1, 2019 The ASU amends ASC Topic 718, Stock Compensation , and simplifies the accounting for share based payments granted to nonemployees for goods and services. The guidance should be implemented on a modified retrospective basis using a cumulative-effect adjustment. The adoption of this guidance did not affect our financial condition or results of operations. ASU 2018-13, Fair Value Measurement: Disclosure Framework September 30, 2018 (removed disclosures only); January 1, 2019, remaining requirements An entity is permitted to early adopt any removed or modified disclosures upon issuance of this ASU and delay adoption of the additional disclosures until their effective date. The ASU amends disclosure requirements related to fair value measurements. Specifically, entities are no longer required to disclose transfers between Level 1 and Level 2 of the fair value hierarchy, or qualitatively disclose the valuation process for Level 3 fair value measurements. The updated guidance requires disclosure of the changes in unrealized gains and losses for the period included in Other Comprehensive Income for recurring Level 3 fair value measurements. Entities also will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. Key removed the disclosures no longer required by the guidance as of September 30, 2018, and early adopted the additional provisions of the standard in the first quarter of 2019. The adoption of this standard did not result in significant changes to Key’s disclosures, and there was no effect to our financial condition or results of operations. Standard Date of Adoption Description Effect on Financial Statements or Other Significant Matters ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract January 1, 2019 Early adoption. The ASU amends ASC Topic 350-40 to align the accounting for costs incurred in a cloud computing arrangement with the guidance on developing internal use software. Specifically, if a cloud computing arrangement is deemed to be a service contract, certain implementation costs are eligible for capitalization. The new guidance prescribes the balance sheet and income statement presentation and cash flow classification for the capitalized costs and related amortization expense. It also requires additional quantitative and qualitative disclosures. The guidance may be adopted prospectively or retrospectively. Key early adopted this guidance effective January 1, 2019, on a prospective basis. The adoption of this guidance did not have a material effect on our financial condition or results of operations.

Basis of Presentation and Acc_3

Basis of Presentation and Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	Accounting Guidance Adopted in 2019 Standard Date of Adoption Description Effect on Financial Statements or Other Significant Matters ASU 2016-02, Leases (Topic 842) ASU 2018-01, Leases (Topic 842): Land Easement Practical Expedient ASU 2018-10, Codification Improvements to Topic 842 ASU 2018-11, Leases (Topic 842): Targeted Improvements ASU 2018-20, Leases (Topic 842): Narrow Scope Improvements for Lessors ASU 2019-01, Codification Improvements to Topic 842 January 1, 2019 The ASUs create and amend ASC Topic 842, Leases , and supersede Topic 840, Leases. The new guidance requires that a lessee recognize assets and liabilities for leases with lease terms of more than 12 months. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. Leveraged leases that commenced before the effective date of the new guidance are grandfathered. The recognition, measurement, and presentation of expenses and cash flows arising from a lease by a lessee primarily will depend on its classification as a finance or operating lease. However, both types of leases are required to be recognized on the balance sheet. ASC 842 requires enhanced disclosures to better understand the amount, timing, and uncertainty of cash flows arising from leases. Qualitative and quantitative disclosures are required to provide additional information about the amounts recorded in the financial statements. Although substantially unchanged, certain amendments provide clarifications related to lessor accounting. The guidance should be implemented using a modified retrospective approach. However, entities may choose to measure and present the changes at the beginning of the earliest period presented or to reflect the changes as of the adoption date. Key adopted this guidance on January 1, 2019, using the package of practical expedients, which allowed Key to maintain historic lease identification and classification, and permitted Key not to reassess initial direct costs under the new guidance. Key also elected the practical expedient on not separating lease components from nonlease components for all of its leases. Adoption resulted in an increase in right-of-use assets and associated lease liabilities arising from operating leases in which Key is the lessee of approximately $710 million on our Consolidated Balance Sheets at January 1, 2019. Right of use assets, lease liabilities, and other changes as a result of adoption are not reflected in comparable periods presented prior to that date. The adoption of this guidance did not have a material impact on the recognition of operating lease expense in our Consolidated Statements of Income. The amount of the right-of-use assets and associated lease liabilities recorded at adoption was based on the present value of unpaid future minimum lease payments. These payments were discounted using Key’s incremental borrowing rate, consistent with what Key would pay to borrow on a collateralized basis over a term similar to each lease. For more information, please see Note 9 (“Leases”). ASU 2017-08, Premium Amortization on Purchased Callable Debt Securities January 1, 2019 The ASU amends ASC Topic 310-20, Receivables — Nonrefundable Fees and Other Costs , and shortens the amortization period to the earliest call date for certain callable debt securities held at a premium. Securities held at a discount will continue to be amortized to maturity. The guidance should be implemented on a modified retrospective basis using a cumulative-effect adjustment. The adoption of this guidance did not have a material effect on our financial condition or results of operations. ASU 2018-07, Stock Compensation - Improvements to Nonemployee Share-Based Payment Accounting January 1, 2019 The ASU amends ASC Topic 718, Stock Compensation , and simplifies the accounting for share based payments granted to nonemployees for goods and services. The guidance should be implemented on a modified retrospective basis using a cumulative-effect adjustment. The adoption of this guidance did not affect our financial condition or results of operations. ASU 2018-13, Fair Value Measurement: Disclosure Framework September 30, 2018 (removed disclosures only); January 1, 2019, remaining requirements An entity is permitted to early adopt any removed or modified disclosures upon issuance of this ASU and delay adoption of the additional disclosures until their effective date. The ASU amends disclosure requirements related to fair value measurements. Specifically, entities are no longer required to disclose transfers between Level 1 and Level 2 of the fair value hierarchy, or qualitatively disclose the valuation process for Level 3 fair value measurements. The updated guidance requires disclosure of the changes in unrealized gains and losses for the period included in Other Comprehensive Income for recurring Level 3 fair value measurements. Entities also will be required to disclose the range and weighted average used to develop significant unobservable inputs for Level 3 fair value measurements. Key removed the disclosures no longer required by the guidance as of September 30, 2018, and early adopted the additional provisions of the standard in the first quarter of 2019. The adoption of this standard did not result in significant changes to Key’s disclosures, and there was no effect to our financial condition or results of operations. Standard Date of Adoption Description Effect on Financial Statements or Other Significant Matters ASU 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract January 1, 2019 Early adoption. The ASU amends ASC Topic 350-40 to align the accounting for costs incurred in a cloud computing arrangement with the guidance on developing internal use software. Specifically, if a cloud computing arrangement is deemed to be a service contract, certain implementation costs are eligible for capitalization. The new guidance prescribes the balance sheet and income statement presentation and cash flow classification for the capitalized costs and related amortization expense. It also requires additional quantitative and qualitative disclosures. The guidance may be adopted prospectively or retrospectively. Key early adopted this guidance effective January 1, 2019, on a prospective basis. The adoption of this guidance did not have a material effect on our financial condition or results of operations.

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2019
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 March 31, dollars in millions, except per share amounts 2019 2018 EARNINGS Income (loss) from continuing operations $ 406 $ 416 Less: Net income (loss) attributable to noncontrolling interests — — Income (loss) from continuing operations attributable to Key 406 416 Less: Dividends on Preferred Stock 20 14 Income (loss) from continuing operations attributable to Key common shareholders 386 402 Income (loss) from discontinued operations, net of taxes 1 2 Net income (loss) attributable to Key common shareholders $ 387 $ 404 WEIGHTED-AVERAGE COMMON SHARES Weighted-average Common Shares outstanding (000) 1,006,717 1,056,037 Effect of Common Share options and other stock awards 9,787 15,749 Weighted-average Common Shares and potential Common Shares outstanding (000) (a) 1,016,504 1,071,786 EARNINGS PER COMMON SHARE Income (loss) from continuing operations attributable to Key common shareholders $ .38 $ .38 Income (loss) from discontinued operations, net of taxes — — Net income (loss) attributable to Key common shareholders (b) .38 .38 Income (loss) from continuing operations attributable to Key common shareholders — assuming dilution $ .38 $ .38 Income (loss) from discontinued operations, net of taxes — assuming dilution — — Net income (loss) attributable to Key common shareholders — assuming dilution (b) .38 .38 (a) Assumes conversion of Common Share options and other stock awards and/or convertible preferred stock, as applicable. (b)

Loan Portfolio (Tables)

Loan Portfolio (Tables)	3 Months Ended
	Mar. 31, 2019
Loans Receivables [Abstract]
Loans by Category	in millions March 31, 2019 December 31, 2018 Commercial and industrial (a) $ 46,474 $ 45,753 Commercial real estate: Commercial mortgage 14,344 14,285 Construction 1,420 1,666 Total commercial real estate loans 15,764 15,951 Commercial lease financing (b) 4,507 4,606 Total commercial loans 66,745 66,310 Residential — prime loans: Real estate — residential mortgage 5,615 5,513 Home equity loans 10,846 11,142 Total residential — prime loans 16,461 16,655 Consumer direct loans 2,165 1,809 Credit cards 1,086 1,144 Consumer indirect loans 3,721 3,634 Total consumer loans 23,433 23,242 Total loans (c) $ 90,178 $ 89,552 (a) Loan balances include $135 million and $132 million of commercial credit card balances at March 31, 2019 , and December 31, 2018 , respectively. (b) Commercial lease financing includes receivables held as collateral for a secured borrowing of $12 million and $10 million at March 31, 2019 , and December 31, 2018 , 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 19 (“ Long-Term Debt ”) beginning on page 160 of our 2018 Form 10-K. (c) Total loans exclude loans of $1.0 billion at March 31, 2019 , and $1.1 billion at December 31, 2018

Asset Quality (Tables)

Asset Quality (Tables)	3 Months Ended
	Mar. 31, 2019
Receivables [Abstract]
Financing Receivable Credit Quality Indicators	Commercial Credit Exposure — Excluding PCI Credit Risk Profile by Creditworthiness Category (a), (b) Commercial and industrial RE — Commercial RE — Construction Commercial lease Total in millions March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, RATING 2019 2018 2019 2018 2019 2018 2019 2018 2019 2018 Pass $ 44,691 $ 44,138 $ 13,734 $ 13,672 $ 1,362 $ 1,537 $ 4,466 $ 4,557 $ 64,253 $ 63,904 Criticized (Accruing) 1,555 1,402 355 354 55 125 32 41 1,997 1,922 Criticized (Nonaccruing) 170 152 83 81 2 2 9 8 264 243 Total $ 46,416 $ 45,692 $ 14,172 $ 14,107 $ 1,419 $ 1,664 $ 4,507 $ 4,606 $ 66,514 $ 66,069 (a) Credit quality indicators are updated on an ongoing basis and reflect credit quality information as of the dates indicated. (b) The term criticized refers to those loans that are internally classified by Key as special mention or worse, which are asset quality categories defined by regulatory authorities. These assets have an elevated level of risk and may have a high probability of default or total loss. Pass rated refers to all loans not classified as criticized. Consumer Credit Exposure — Excluding PCI Non-PCI Loans by Refreshed FICO Score (a) Residential — Prime Consumer direct loans Credit cards Consumer indirect loans Total in millions March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, FICO SCORE 2019 2018 2019 2018 2019 2018 2019 2018 2019 2018 750 and above $ 9,818 $ 9,794 $ 548 $ 549 $ 477 $ 521 $ 1,679 $ 1,647 $ 12,522 $ 12,511 660 to 749 4,690 4,906 683 700 485 507 1,354 1,320 7,212 7,433 Less than 660 1,394 1,411 217 224 124 116 556 565 2,291 2,316 No Score 242 213 714 333 — — 132 102 1,088 648 Total $ 16,144 $ 16,324 $ 2,162 $ 1,806 $ 1,086 $ 1,144 $ 3,721 $ 3,634 $ 23,113 $ 22,908 (a) Borrower FICO scores provide information about the credit quality of our consumer loan portfolio as they provide an indication as to the likelihood that a debtor will repay its debts. The scores are obtained from a nationally recognized consumer rating agency and are presented in the above table at the dates indicated. Commercial Credit Exposure — PCI Credit Risk Profile by Creditworthiness Category (a), (b) Commercial and Industrial RE — Commercial RE — Construction Commercial Lease Total in millions March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, RATING 2019 2018 2019 2018 2019 2018 2019 2018 2019 2018 Pass $ 36 $ 37 $ 125 $ 125 $ 1 $ 2 — — $ 162 $ 164 Criticized 22 24 47 53 — — — — 69 77 Total $ 58 $ 61 $ 172 $ 178 $ 1 $ 2 — — $ 231 $ 241 (a) Credit quality indicators are updated on an ongoing basis and reflect credit quality information as of the dates indicated. (b) The term “criticized” refers to those loans that are internally classified by Key as special mention or worse, which are asset quality categories defined by regulatory authorities. These assets have an elevated level of risk and may have a high probability of default or total loss. Pass rated refers to all loans not classified as criticized. Consumer Credit Exposure — PCI PCI Loans by Refreshed FICO Score (a) Residential — Prime Consumer direct loans Credit cards Consumer indirect loans Total in millions March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, March 31, December 31, FICO SCORE 2019 2018 2019 2018 2019 2018 2019 2018 2019 2018 750 and above $ 126 $ 137 — — — — — — $ 126 $ 137 660 to 749 95 95 $ 1 $ 1 — — — — 96 96 Less than 660 90 97 2 2 — — — — 92 99 No Score 6 2 — — — — — — 6 2 Total $ 317 $ 331 $ 3 $ 3 — — — — $ 320 $ 334 (a) Borrower FICO scores provide information about the credit quality of our consumer loan portfolio as they provide an indication as to the likelihood that a debtor will repay its debts. The scores are obtained from a nationally recognized consumer rating agency and are presented in the above table at the dates indicated.
Past Due Loans Including Current Loans	The following aging analysis of past due and current loans as of March 31, 2019 , and December 31, 2018 , provides further information regarding Key’s credit exposure. Aging Analysis of Loan Portfolio (a) March 31, 2019 Current 30-59 Days Past Due (b) 60-89 Days Past Due (b) 90 and Greater Days Past Due (b) Non-performing Loans Total Past Due and Non-performing Loans Purchased Credit Impaired Total Loans (c), (d) in millions LOAN TYPE Commercial and industrial $ 46,063 $ 79 $ 47 $ 57 $ 170 $ 353 $ 58 $ 46,474 Commercial real estate: Commercial mortgage 14,056 10 7 17 82 116 172 14,344 Construction 1,404 6 — 7 2 15 1 1,420 Total commercial real estate loans 15,460 16 7 24 84 131 173 15,764 Commercial lease financing 4,463 18 12 5 9 44 — 4,507 Total commercial loans $ 65,986 $ 113 $ 66 $ 86 $ 263 $ 528 $ 231 $ 66,745 Real estate — residential mortgage $ 5,234 $ 9 $ 4 $ 3 $ 64 $ 80 $ 301 $ 5,615 Home equity loans 10,583 31 12 9 195 247 16 10,846 Consumer direct loans 2,141 7 4 7 3 21 3 2,165 Credit cards 1,061 7 4 11 3 25 — 1,086 Consumer indirect loans 3,666 26 7 2 20 55 — 3,721 Total consumer loans $ 22,685 $ 80 $ 31 $ 32 $ 285 $ 428 $ 320 $ 23,433 Total loans $ 88,671 $ 193 $ 97 $ 118 $ 548 $ 956 $ 551 $ 90,178 (a) Amounts in table represent recorded investment and exclude loans held for sale. 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. (b) Past due loan amounts exclude PCI, even if contractually past due (or if we do not expect to collect principal or interest in full based on the original contractual terms), as we are currently accreting income over the remaining term of the loans. (c) Net of unearned income, net deferred loan fees and costs, and unamortized discounts and premiums. (d) Future accretable yield related to PCI loans is not included in the analysis of the loan portfolio. December 31, 2018 Current 30-59 Days Past Due (b) 60-89 Days Past Due (b) 90 and Greater Days Past Due (b) Non-performing Loans Total Past Due and Non-performing Loans Purchased Credit Impaired Total Loans (c), (d) in millions LOAN TYPE Commercial and industrial $ 45,375 $ 89 $ 31 $ 45 $ 152 $ 317 61 $ 45,753 Commercial real estate: Commercial mortgage 13,957 27 17 25 81 150 178 14,285 Construction 1,646 — 13 3 2 18 2 1,666 Total commercial real estate loans 15,603 27 30 28 83 168 180 15,951 Commercial lease financing 4,580 12 1 4 9 26 — 4,606 Total commercial loans $ 65,558 $ 128 $ 62 $ 77 $ 244 $ 511 241 $ 66,310 Real estate — residential mortgage $ 5,119 $ 11 $ 3 $ 4 $ 62 $ 80 $ 314 $ 5,513 Home equity loans 10,862 31 12 10 210 263 17 11,142 Consumer direct loans 1,780 11 5 6 4 26 3 1,809 Credit cards 1,119 6 5 12 2 25 — 1,144 Consumer indirect loans 3,573 31 7 3 20 61 — 3,634 Total consumer loans $ 22,453 $ 90 $ 32 $ 35 $ 298 $ 455 $ 334 $ 23,242 Total loans $ 88,011 $ 218 $ 94 $ 112 $ 542 $ 966 $ 575 $ 89,552 (a) Amounts in table represent recorded investment and exclude loans held for sale. 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. (b) Past due loan amounts exclude PCI, even if contractually past due (or if we do not expect to collect principal or interest in full based on the original contractual terms), as we are currently accreting income over the remaining term of the loans. (c) Net of unearned income, net deferred loan fees and costs, and unamortized discounts and premiums. (d) Future accretable yield related to purchased credit impaired loans is not included in the analysis of the loan portfolio.
Breakdown of Individually Impaired Loans	The following tables set forth a further breakdown of individually impaired loans as of March 31, 2019 , and December 31, 2018 : March 31, 2019 December 31, 2018 Recorded Investment (a) Unpaid Principal Balance (b) Specific Allowance Recorded Investment (a) Unpaid Principal Balance (b) Specific Allowance in millions With no related allowance recorded: Commercial and industrial $ 152 $ 184 — $ 118 $ 175 — Commercial real estate: Commercial mortgage 59 70 — 64 70 — Total commercial real estate loans 59 70 — 64 70 — Total commercial loans 211 254 — 182 245 — Real estate — residential mortgage 4 5 — 4 5 — Home equity loans 47 54 — 49 56 — Consumer direct loans — 1 — 1 1 — Consumer indirect loans 2 4 — 2 4 — Total consumer loans 53 64 — 56 66 — Total loans with no related allowance recorded 264 318 — 238 311 — With an allowance recorded: Commercial and industrial 17 30 $ 2 44 47 $ 5 Commercial real estate: Commercial mortgage 2 3 — 2 3 1 Total commercial real estate loans 2 3 — 2 3 1 Total commercial loans 19 33 2 46 50 6 Real estate — residential mortgage 43 68 3 45 70 3 Home equity loans 81 87 8 78 85 8 Consumer direct loans 4 4 — 3 3 — Credit cards 3 3 — 3 3 — Consumer indirect loans 35 35 3 34 34 2 Total consumer loans 166 197 14 163 195 13 Total loans with an allowance recorded 185 230 16 209 245 19 Total $ 449 $ 548 $ 16 $ 447 $ 556 $ 19 (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. The following table sets forth a further breakdown of the average individually impaired loans reported by Key: Average Recorded Investment (a) Three Months Ended March 31, in millions 2019 2018 Commercial and industrial $ 165 $ 153 Commercial real estate: Commercial mortgage 64 12 Total commercial real estate loans 64 12 Total commercial loans 229 165 Real estate — residential mortgage 48 49 Home equity loans 128 120 Consumer direct loans 4 4 Credit cards 3 3 Consumer indirect loans 36 35 Total consumer loans 219 211 Total $ 448 $ 376 (a)
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 that occurred during the periods indicated: Three Months Ended March 31, in millions 2019 2018 Commercial loans: Extension of Maturity Date — $ 1 Total — $ 1 Consumer loans: Interest rate reduction $ 4 $ 8 Other 9 12 Total $ 13 $ 20 Total commercial and consumer TDRs $ 13 $ 21
Summary Of Post-Modification Outstanding Recorded Investment, Accruing And Nonaccruing TDRs	The following table summarizes the change in the post-modification outstanding recorded investment of our accruing and nonaccruing TDRs during the periods indicated: Three Months Ended March 31, in millions 2019 2018 Balance at beginning of the period $ 399 $ 317 Additions 14 21 Payments (39 ) (19 ) Charge-offs (9 ) (2 ) Balance at end of period $ 365 $ 317
Breakdown of Nonperforming TDRs by Loans Category	A further breakdown of TDRs included in nonperforming loans by loan category for the periods indicated are as follows: March 31, 2019 December 31, 2018 Number of Loans Pre-modification Outstanding Recorded Investment Post-modification Outstanding Recorded Investment Number of Loans Pre-modification Outstanding Recorded Investment Post-modification Outstanding Recorded Investment dollars in millions LOAN TYPE Nonperforming: Commercial and industrial 27 $ 89 $ 57 35 $ 121 $ 85 Commercial real estate: Commercial mortgage 7 66 58 6 66 62 Total commercial real estate loans 7 66 58 6 66 62 Total commercial loans 34 155 115 41 187 147 Real estate — residential mortgage 284 20 18 281 21 20 Home equity loans 884 52 49 1,142 66 63 Consumer direct loans 120 2 1 171 2 1 Credit cards 225 1 1 330 2 2 Consumer indirect loans 974 16 14 1,098 18 14 Total consumer loans 2,487 91 83 3,022 109 100 Total nonperforming TDRs 2,521 246 198 3,063 296 247 Prior-year accruing: (a) Commercial and industrial 9 38 31 11 37 32 Commercial real estate Commercial mortgage 1 — — 2 — — Total commercial real estate loans 1 — — 2 — — Total commercial loans 10 38 31 13 37 32 Real estate — residential mortgage 481 35 30 491 36 30 Home equity loans 1,648 96 79 1,403 82 64 Consumer direct loans 136 5 3 79 4 3 Credit cards 598 3 1 479 3 1 Consumer indirect loans 753 37 23 556 33 22 Total consumer loans 3,616 176 136 3,008 158 120 Total prior-year accruing TDRs 3,626 214 167 3,021 195 152 Total TDRs 6,147 $ 460 $ 365 6,084 $ 491 $ 399 (a) All TDRs that were restructured prior to January 1, 2019 , and January 1, 2018 , and are fully accruing.
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: Three months ended March 31, 2019 : in millions December 31, 2018 Provision Charge-offs Recoveries March 31, 2019 Commercial and Industrial $ 532 $ 24 $ (36 ) $ 10 $ 530 Commercial real estate: Real estate — commercial mortgage 142 6 (5 ) 1 144 Real estate — construction 33 (1 ) (4 ) — 28 Total commercial real estate loans 175 5 (9 ) 1 172 Commercial lease financing 36 6 (8 ) 1 35 Total commercial loans 743 35 (53 ) 12 737 Real estate — residential mortgage 7 1 (1 ) 1 8 Home equity loans 35 3 (4 ) 2 36 Consumer direct loans 30 12 (10 ) 1 33 Credit cards 48 8 (11 ) 2 47 Consumer indirect loans 20 5 (8 ) 5 22 Total consumer loans 140 29 (34 ) 11 146 Total ALLL — continuing operations 883 64 (a) (87 ) 23 883 Discontinued operations 14 2 (4 ) 1 13 Total ALLL — including discontinued operations $ 897 $ 66 $ (91 ) $ 24 $ 896 (a) Excludes a credit for losses on lending-related commitments of $2 million . Three months ended March 31, 2018 : in millions December 31, 2017 Provision Charge-offs Recoveries March 31, 2018 Commercial and Industrial $ 529 $ 35 $ (37 ) $ 6 $ 533 Commercial real estate: Real estate — commercial mortgage 133 4 (1 ) — 136 Real estate — construction 30 2 — 1 33 Total commercial real estate loans 163 6 (1 ) 1 169 Commercial lease financing 43 (3 ) (1 ) 1 40 Total commercial loans 735 38 (39 ) 8 742 Real estate — residential mortgage 7 3 (1 ) — 9 Home equity loans 43 (4 ) (4 ) 3 38 Consumer direct loans 28 5 (8 ) 2 27 Credit cards 44 12 (12 ) 1 45 Consumer indirect loans 20 4 (8 ) 4 20 Total consumer loans 142 20 (33 ) 10 139 Total ALLL — continuing operations 877 58 (a) (72 ) 18 881 Discontinued operations 16 2 (4 ) 2 16 Total ALLL — including discontinued operations $ 893 $ 60 $ (76 ) $ 20 $ 897 (a) Excludes a provision for losses on lending-related commitments of $3 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 March 31, 2019 , follows: Allowance Outstanding March 31, 2019 Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit Impaired Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit Impaired in millions Commercial and industrial $ 2 $ 527 $ 1 $ 46,474 $ 169 $ 46,247 $ 58 Commercial real estate: Commercial mortgage — 142 2 14,344 61 14,111 172 Construction — 28 — 1,420 — 1,419 1 Total commercial real estate loans — 170 2 15,764 61 15,530 173 Commercial lease financing — 35 — 4,507 — 4,507 — Total commercial loans 2 732 3 66,745 230 66,284 231 Real estate — residential mortgage 3 4 1 5,615 47 5,267 301 Home equity loans 8 27 1 10,846 128 10,702 16 Consumer direct loans — 33 — 2,165 4 2,158 3 Credit cards — 47 — 1,086 3 1,083 — Consumer indirect loans 3 19 — 3,721 37 3,684 — Total consumer loans 14 130 2 23,433 219 22,894 320 Total ALLL — continuing operations 16 862 5 90,178 449 89,178 551 Discontinued operations 2 11 — 1,019 (a) 23 996 (a) — Total ALLL — including discontinued operations $ 18 $ 873 $ 5 $ 91,197 $ 472 $ 90,174 $ 551 (a) Amount includes $2 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 December 31, 2018 , follows: Allowance Outstanding December 31, 2018 Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit Impaired Loans Individually Evaluated for Impairment Collectively Evaluated for Impairment Purchased Credit Impaired in millions Commercial and Industrial $ 5 $ 526 $ 1 $ 45,753 $ 162 $ 45,530 $ 61 Commercial real estate: Commercial mortgage — 139 3 14,285 66 14,041 178 Construction — 33 — 1,666 — 1,664 2 Total commercial real estate loans — 172 3 15,951 66 15,705 180 Commercial lease financing — 36 — 4,606 — 4,606 — Total commercial loans 5 734 4 66,310 228 65,841 241 Real estate — residential mortgage 3 4 — 5,513 49 5,150 314 Home equity loans 8 26 1 11,142 127 10,998 17 Consumer direct loans — 30 — 1,809 4 1,802 3 Credit cards — 48 — 1,144 3 1,141 — Consumer indirect loans 3 17 — 3,634 36 3,598 — Total consumer loans 14 125 1 23,242 219 22,689 334 Total ALLL — continuing operations 19 859 5 89,552 447 88,530 575 Discontinued operations 2 12 — 1,073 (a) 23 1,050 (a) — Total ALLL — including discontinued operations $ 21 $ 871 $ 5 $ 90,625 $ 470 $ 89,580 $ 575 (a) Amount includes $2 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 March 31, in millions 2019 2018 Balance at beginning of period $ 64 $ 57 Provision (credit) for losses on lending-related commitments (2 ) 3 Balance at end of period $ 62 $ 60
Schedule of Changes in Outstanding Unpaid Principal Balance, Carrying Amount, and Accretable Yield for PCI Loans	The following tables present the roll-forward of the accretable yield and the beginning and ending outstanding unpaid principal balance and carrying amount of all PCI loans for the three months ended March 31, 2019 , and the twelve months ended December 31, 2018 . Three Months Ended March 31, 2019 in millions Accretable Yield Carrying Amount Outstanding Unpaid Principal Balance Balance at beginning of period $ 117 $ 571 $ 607 Accretion (10 ) Net reclassifications from nonaccretable to accretable 13 Payments received, net (2 ) Balance at end of period $ 118 $ 547 $ 578 Twelve Months Ended December 31, 2018 in millions Accretable Yield Carrying Amount Outstanding Unpaid Principal Balance Balance at beginning of period $ 131 $ 738 $ 803 Accretion (42 ) Net reclassifications from nonaccretable to accretable 50 Payments received, net (21 ) Loans charged off (1 ) Balance at end of period $ 117 $ 571 $ 607

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2019
Fair Value Disclosures [Abstract]
Fair Value of Assets and Liabilities Measured on Recurring Basis	The following tables present these assets and liabilities at March 31, 2019 , and December 31, 2018 . March 31, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total in millions ASSETS MEASURED ON A RECURRING BASIS Trading account assets: U.S. Treasury, agencies and corporations — $ 746 — $ 746 — $ 578 — $ 578 States and political subdivisions — 46 — 46 — 60 — 60 Other mortgage-backed securities — 85 — 85 — 164 — 164 Other securities 1 68 — 69 — 22 — 22 Total trading account securities 1 945 — 946 — 824 — 824 Commercial loans — 33 — 33 — 25 — 25 Total trading account assets 1 978 — 979 — 849 — 849 Securities available for sale: U.S. Treasury, agencies and corporations — 270 — 270 — 147 — 147 States and political subdivisions — 6 — 6 — 7 — 7 Agency residential collateralized mortgage obligations — 14,080 — 14,080 — 13,962 — 13,962 Agency residential mortgage-backed securities — 2,143 — 2,143 — 2,105 — 2,105 Agency commercial mortgage-backed securities — 4,330 — 4,330 — 3,187 — 3,187 Other securities — — $ 25 25 — — $ 20 20 Total securities available for sale — 20,829 25 20,854 — 19,408 20 19,428 Other investments: Principal investments: Direct — — 1 1 — — 1 1 Indirect (measured at NAV) (a) — — — 83 — — — 96 Total principal investments — — 1 84 — — 1 97 Equity investments: Direct — 1 8 9 — 1 7 8 Direct (measured at NAV) (a) — — — 1 — — — 1 Indirect (measured at NAV) (a) — — — 9 — — — 9 Total equity investments — 1 8 19 — 1 7 18 Total other investments — 1 9 103 — 1 8 115 Loans, net of unearned income (residential) — — 3 3 — — 3 3 Loans held for sale (residential) — 70 1 71 — 54 — 54 Derivative assets: Interest rate — 526 3 529 — 410 5 415 Foreign exchange $ 45 31 — 76 $ 70 $ 36 $ — $ 106 Commodity — 233 — 233 — 333 — 333 Credit — 1 — 1 — 1 — 1 Other — 7 4 11 — 6 3 9 Derivative assets 45 798 7 850 70 786 8 864 Netting adjustments (b) — — — (324 ) — — — (333 ) Total derivative assets 45 798 7 526 70 786 8 531 Accrued income and other assets — — — — — — — — Total assets on a recurring basis at fair value $ 46 $ 22,676 $ 45 $ 22,536 $ 70 $ 21,098 $ 39 $ 20,980 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions $ 10 $ 669 — $ 679 $ 14 $ 530 — $ 544 Derivative liabilities: Interest rate — 237 — 237 — 297 — 297 Foreign exchange 36 32 — 68 58 37 — 95 Commodity — 223 — 223 — 323 — 323 Credit — 2 $ 1 3 — 1 — 1 Other — 8 — 8 — 7 — 7 Derivative liabilities 36 502 1 539 58 665 — 723 Netting adjustments (b) — — — (336 ) — — — (337 ) Total derivative liabilities 36 502 1 203 58 665 — 386 Accrued expense and other liabilities — — — — — — — — Total liabilities on a recurring basis at fair value $ 46 $ 1,171 $ 1 $ 882 $ 72 $ 1,195 — $ 930 (a) Certain investments that are measured at fair value using the net asset value per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the amounts presented in the consolidated balance sheet. (b)
Fair Value Measurement Inputs and Valuation Techniques	Asset/liability class Valuation technique Valuation hierarchy classification(s) Other direct equity investments Fair value is determined using: • Discounted cash flows • Operating performance and market/exit multiples of comparable businesses • Other unique facts and circumstances related to each individual investment For level 3 securities, increases (decreases) in the discount rate and marketability discount used in the discounted cash flow models would have resulted in lower (higher) fair value measurements. Higher volatility factors would have further magnified changes in fair value. Level 2 investments reflect the price of recent investments, which is deemed representative of fair value. Level 2 and 3 Other direct and indirect equity investments (NAV) Certain direct investments do not have readily determinable fair values and qualify for the practical expedient in the accounting guidance that allows us to estimate fair value based upon net asset value per share. NAV Loans held for sale and held for investment (residential) Residential mortgage loans held for sale are accounted for at fair value. The election of the fair value option aligns the accounting for these assets with the related forward loan sale commitments. Fair values are based on: • Quoted market prices, where available • Prices for other traded mortgage loans with similar characteristics • Purchase commitments and bid information received from market participants Prices are adjusted as necessary to include: • The embedded servicing value in the loans • The specific characteristics of certain loans that are priced based on the pricing of similar loans. (These adjustments represent unobservable inputs to the valuation but are not considered significant given the relative insensitivity of the value to changes in these inputs to the fair value of the loans.) Residential loans held for investment: Certain residential loans held for sale contain salability exceptions that make them unable to be sold into the performing loan sales market. Loans in this category are transferred to the held to maturity loan portfolio and are included in “Loans, net of unearned income” on the balance sheet. This type of loan is classified as level 3 in the valuation hierarchy as transaction details regarding sales of this type of loan are often unavailable. Fair value is based upon: • Unobservable bid information from brokers and investors Higher (lower) unobservable bid information would have resulted in higher (lower) fair value measurements. Level 1, 2 and 3 (primarily level 2) Derivatives Exchange-traded derivatives are valued using quoted prices in active markets and, therefore, are classified as Level 1 instruments. The majority of our derivative positions are level 2 and are valued using internally developed models based on market convention and observable market inputs. These derivative contracts include interest rate swaps, certain options, floors, cross currency swaps, credit default swaps, and forward mortgage loan sale commitments. Significant inputs used in the valuation models include: • Interest rate curves • Yield curves • LIBOR and Overnight Index Swap (OIS) discount rates • LIBOR and OIS curves, index pricing curves, foreign currency curves • Volatility surfaces (a three-dimensional graph of implied volatility against strike price and maturity) Level 1, 2, and 3 (primarily level 2) Asset/liability class Valuation technique Valuation hierarchy classification(s) Derivatives (continued) 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 The unobservable internally derived assumptions include: • Loss probabilities • Internal risk ratings of customers 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, higher (lower) loss probabilities and internal risk ratings would have resulted in a lower (higher) fair value measurement of the risk participations. A directionally similar change would have also applied to other customized derivative instruments classified as Level 3. We use interest rate lock commitments for our residential mortgage business, which are classified as Level 3 instruments. The significant components of the valuation model include: • Interest rates observable in the market • Investor supplied prices for similar securities • The probability of the loan closing (i.e. the "pull-through" amount, a significant unobservable input). Increases (decreases) in the probability of the loan closing would have resulted in higher (lower) fair value measurements. Valuation of residential mortgage forward sale commitments utilizes observable market prices of comparable commitments and mortgage securities (Level 2). Level 1, 2, and 3 (primarily level 2) Liability for short positions This includes fixed income securities held by our broker dealer in its trading inventory. Fair value of level 1 securities is determined by: • Quoted market prices available in an active market for identical securities Fair value of level 2 securities is determined by: • Observable market prices of similar securities • Market activity, spreads, credit ratings and interest rates for each security type Level 1 and 2 Asset/liability class Valuation technique Valuation hierarchy classification(s) Impaired loans and leases Loans are evaluated for impairment on a quarterly basis; impairment typically occurs when there is evidence of a probable loss and the expected value of the loan is less than the contractual value of the loan. The amount of the impairment may be determined based on the estimated present value of future cash flows, the fair value of the underlying collateral (Level 3), or the loan’s observable market price based on recent sales of similar loans and collateral (Level 2). Cash flow analysis considers internally developed inputs including: • Discount rates • Default rates • Changes in collateral values and costs of foreclosure Level 2 and 3 Commercial loans held for sale Through a quarterly analysis of our loan portfolios held for sale, which include both performing and nonperforming commercial loans, we determine any adjustments necessary to record the portfolios at the lower of cost or fair value in accordance with GAAP. Valuation inputs include: • Non-binding bids for the respective loans or similar loans • Recent sales transactions • Internal models that emulate recent securitizations Level 2 and 3 Asset/liability class Valuation technique Valuation hierarchy classification(s) Direct financing leases and operating lease assets held for sale Valuations of direct financing leases and operating lease assets held for sale are performed using an internal model that relies on market data, including: • Swap rates and bond ratings • Our own assumptions about the exit market for the leases • Details about the individual leases in the portfolio Leases for which we receive a current nonbinding bid, and for which the sale is considered probable, may be classified as Level 2. Valuations of lease and operating lease assets held for sale that employ our own assumptions are classified as Level 3 assets. The inputs based on our own assumptions include changes in the value of leased items and internal credit ratings. Level 2 and 3 OREO and other repossessed personal property OREO and other repossessed properties are valued based on: • Appraisals and third-party price opinions, less estimated selling costs Generally, we classify these assets as Level 3, but OREO and other repossessed properties for which we receive binding purchase agreements are classified as Level 2. Returned lease inventory is valued based on market data for similar assets and is classified as Level 2. Level 2 and 3 LIHTC, HTC, and NMTC investments Valuation of LIHTC, HTC and NMTC involves measuring the present value of future tax benefits and comparing that value against the current carrying value of the investment. Expected future tax benefit are discounted to their present value using discounted cash flow modeling that incorporates an appropriate risk premium. LIHTC and HTC investments are impaired when it is more likely than not that the carrying amount of the investment will not be realized. Level 3 Other equity investments We have other investments in equity securities that do not have readily determinable fair values and do not qualify for the practical expedient to measure the investment using a net asset value per share. We have elected to measure these securities at cost less impairment plus or minus adjustments due to observable orderly transactions. Impairment is recorded when there is evidence that the expected fair value of the investment has declined to below the recorded cost. At each reporting period, we assess if these investments continue to qualify for this measurement alternative. At March 31, 2019, and December 31, 2018, the carrying amount of equity investments under this method was $127 million and $107 million, respectively. No impairment was recorded for the three months ended March 31, 2019. Level 3 Mortgage Servicing Rights Refer to Note 8. Mortgage Servicing Assets Level 3 Asset/liability class Valuation technique Valuation hierarchy classification(s) Securities (trading account assets and available for sale) Fair value of level 1 securities is determined by: • Quoted market prices available in an active market for identical securities. This includes exchange-traded equity securities. Fair value of level 2 securities is determined by: • Pricing models (either by a third party pricing service or internally). Inputs include: yields, benchmark securities, bids, 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. • Observable market prices of similar securities. Fair value of level 3 securities is determined by: • Internal models, principally discounted cash flow models (income approach). • Revenue multiples of comparable public companies (market approach). For level 3 securities, increases (decreases) in the discount rate and marketability discount used in the discounted cash flow models would have resulted in lower (higher) fair value measurements. Higher volatility factors would have further magnified changes in fair value. 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. Level 1, 2, and 3 (primarily Level 2) Commercial loans (trading account assets) Fair value is based on: • Observable market price spreads for similar loans. Valuations reflect prices within the bid-ask spread that are most representative of fair value. Level 2 Principal investments (direct) Direct principal investments consist of equity and debt instruments of private companies made by our principal investing entities. Fair value is determined using: • Operating performance and market multiples of comparable businesses • Other unique facts and circumstances related to each individual investment Direct principal investments are accounted for as investment companies in accordance with the applicable accounting guidance, whereby each investment is adjusted to fair value with any net realized or unrealized gain/loss recorded in the current period’s earnings. We are in the process of winding down our direct principal investment portfolio. As of March 31, 2019, the balance is less than $1 million. Level 3 Principal investments (indirect) Indirect principal 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 and qualify for the practical expedient 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). Indirect principal investments are also accounted for as investment companies, whereby each investment is adjusted to fair value with any net realized or unrealized gain/loss recorded in the current period’s earnings. Under the provisions of the Volcker Rule, we are required to dispose or conform our indirect investments to the requirements of the statute by no later than July 21, 2022. As of March 31, 2019, we have not committed to a plan to sell these investments. Therefore, these investments continue to be valued using the net asset value per share methodology. NAV
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 March 31, 2019 , as well as financial support provided for the three months ended March 31, 2019 , and March 31, 2018 . Financial support provided Three months ended March 31, March 31, 2019 2019 2018 in millions Fair Value Unfunded Commitments Funded Commitments Funded Other Funded Commitments Funded Other INVESTMENT TYPE Direct investments $ 1 — — $ 1 — — Indirect investments (measured at NAV) (a) 83 $ 25 $ 1 — — — Total $ 84 $ 25 1 $ 1 — — (a) 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. At March 31, 2019
Change in Fair Values of Level 3 Financial Instruments	The following table shows the components of the change in the fair values of our Level 3 financial instruments for the three months ended March 31, 2019 , and March 31, 2018 . in millions Beginning of Period Balance Gains (Losses) Included in Other Comprehensive Income Gains (Losses) Included in Earnings Purchases Sales Settlements Transfers Other Transfers into Level 3 Transfers out of Level 3 End of Period Balance Unrealized Gains (Losses) Included in Earnings Three months ended March 31, 2019 Securities available for sale Other securities $ 20 $ 5 — — — — — — — $ 25 — Other investments Principal investments Direct 1 — — (a) $ 1 $ (1 ) — — — — 1 — (a) Equity investments Direct 7 — — — — — — $ 1 — 8 — Loans held for sale — — — — — — $ 1 — — 1 — Loans held for investment 3 — — — — — — — — 3 — Derivative instruments (b) Interest rate 5 — $ 1 (c) — — — — 1 (d) $ (4 ) (d) 3 — Credit — — — (c) (1 ) — — — — — (1 ) — Other (e) 3 — — — — — 1 — — 4 — in millions Beginning of Period Balance Gains (Losses) Included in Other Comprehensive Income Gains (Losses) Included in Earnings Purchases Sales Settlements Transfers Other Transfers into Level 3 Transfers out of Level 3 End of Period Balance Unrealized Gains (Losses) Included in Earnings Three months ended March 31, 2018 Securities available for sale Other securities $ 20 — — — — — — — — $ 20 — Other investments Principal investments Direct 13 $ — $ (1 ) (a) — — — — — — 12 $ (1 ) (a) Equity investments Direct 3 — — — — — — $ 4 — 7 — Loans held for sale 1 — — — — — — — — 1 — Loans held for investment (residential) 2 — — — — — — — — 2 — Derivative instruments (b) Interest rate 9 — (1 ) (c) — — — — 1 (d) $ (5 ) (d) 4 — Credit 1 — (5 ) (c) — — $ 4 — — — — — Other (e) 3 — — — — — $ — — — 3 — (a) Realized and unrealized gains and losses on principal investments are reported in “other income” on the income statement. (b) Amounts represent Level 3 derivative assets less Level 3 derivative liabilities. (c) Realized and unrealized gains and losses on derivative instruments are reported in “corporate services income” and “other income” on the income statement. (d) 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. (e)
Assets and Liabilities Measured at Fair Value on Nonrecurring Basis	The following table presents our assets measured at fair value on a nonrecurring basis at March 31, 2019 , and December 31, 2018 : March 31, 2019 December 31, 2018 in millions Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total ASSETS MEASURED ON A NONRECURRING BASIS Impaired loans and leases — $ — $ 17 $ 17 — — $ 42 $ 42 Accrued income and other assets — — 2 2 — $ — 16 16 Total assets on a nonrecurring basis at fair value — $ — $ 19 $ 19 — $ — $ 58 $ 58
Quantitative Information about Level 3 Fair Value Measurements	The following table describes the significant unobservable inputs of our level 3 assets and liabilities: March 31, 2019 Level 3 Asset (Liability) Valuation Technique Significant Unobservable Input Range (Weighted-Average) (b), (c) dollars in millions Recurring Securities available-for-sale: Other investments $ 25 Discounted cash flows Discount rate 14.34 - 15.01% (14.62%) Marketability discount N/A (30.00%) Volatility factor 37.00 - 42.00% (39.93%) Other investments: (a) Equity investments Direct 8 Discounted cash flows Discount rate 14.83 - 17.59% (15.72%) Marketability discount N/A (30.00%) Volatility factor N/A (49.00%) Loans held for sale (residential) 1 Market comparable pricing Comparability factor 80.50 - 97.00% (86.74%) Loans held for investment (residential) 3 Market comparable pricing Comparability factor 77.57 - 94.75% (89.50%) Derivative instruments: Interest rate 3 Discounted cash flows Probability of default .02 - 100% (2.1%) Internal risk rating 1 - 19 (8.80) Loss given default 0 - 1 (.49) Credit (1 ) Discounted cash flows Probability of default .02 - 100% (2.57%) Internal risk rating 1 - 19 (9.32) Loss given default 0 - 1 (.50) Other (d) 4 Discounted cash flows Loan closing rates 35.93 - 99.69% (76.10%) Nonrecurring Impaired loans $ 17 Fair value of underlying collateral Discount rate 20.00 - 50.00% (23.00%) Accrued income and other assets: OREO and other Level 3 assets $ 2 Appraised value Appraised value N/M December 31, 2018 Level 3 Asset (Liability) Valuation Technique Significant Unobservable Input Range (Weighted-Average (b)(c) ) dollars in millions Nonrecurring Impaired loans $ 42 Fair value of underlying collateral Discount rate 20.00 - 40.00% (21.00%) (a) Principal investments, direct is excluded from this table as the balance at March 31, 2019 , is insignificant (less than $1 million). (b) The weighted average of significant unobservable inputs is calculated using a weighting relative to fair value. (c) For significant unobservable inputs with no range, a single figure is reported to denote the single quantitative factor used. (d)
Fair Value Disclosures of Financial Instruments	The levels in the fair value hierarchy ascribed to our financial instruments and the related carrying amounts at March 31, 2019 , and December 31, 2018 , are shown in the following tables. Assets and liabilities are further arranged by measurement category. March 31, 2019 Fair Value in millions Carrying Amount Level 1 Level 2 Level 3 Measured at NAV Netting Adjustment Total ASSETS (by measurement category) Fair value - net income Trading account assets (b) $ 979 $ 1 $ 978 — — — $ 979 Other investments (b) 646 — 1 $ 552 $ 93 — 646 Loans, net of unearned income (d) 3 — — 3 — — 3 Loans held for sale (b) 71 — 70 1 — — 71 Derivative assets - trading (b) 489 45 774 7 — $ (337 ) (f) 489 Fair value - OCI Securities available for sale (b) 20,854 — 20,829 $ 25 — — 20,854 Derivative assets - hedging (b)(g) 37 — 24 — — 13 (f) 37 Amortized cost Held-to-maturity securities (c) 11,234 — 10,997 — — — 10,997 Loans, net of unearned income (d) 89,292 — — 87,378 — — 87,378 Loans held for sale (b) 823 — — 823 — — 823 Other Cash and short-term investments (a) 3,122 3,122 — — — — 3,122 LIABILITIES (by measurement category) Fair value - net income Derivative liabilities - trading (b) $ 198 $ 36 $ 492 1 — $ (331 ) (f) $ 198 Fair value - OCI Derivative liabilities - hedging (b)(g) 5 — 10 — — (5 ) (f) 5 Amortized cost Time deposits (e) 13,969 — 14,076 — — — 14,076 Short-term borrowings (a) 945 $ 10 935 — — — 945 Long-term debt (e) 14,168 13,235 1,222 — — — 14,457 Other Deposits with no stated maturity (a) 94,206 — 94,206 — — — 94,206 December 31, 2018 Fair Value in millions Carrying Amount Level 1 Level 2 Level 3 Measured at NAV Netting Adjustment Total ASSETS (by measurement category) Fair value - net income Trading account assets (b) $ 849 — $ 849 — — — $ 849 Other investments (b) 666 — 1 $ 559 $ 106 — 666 Loans, net of unearned income (d) 3 — — 3 — — 3 Loans held for sale (b) 54 — 54 — — — 54 Derivative assets - trading (b) 462 $ 68 736 8 — $ (350 ) (f) 462 Fair value - OCI Securities available for sale (b) 19,428 — 19,408 20 — — 19,428 Derivative assets - hedging (b)(g) 69 2 50 — — 17 (f) 69 Amortized cost Held-to-maturity securities (c) 11,519 — 11,122 — — — 11,122 Loans, net of unearned income (d) 88,666 — — 86,224 — — 86,224 Loans held for sale (b) 1,173 — — 1,173 — — 1,173 Other Cash and short-term investments (a) 3,240 3,240 — — — — 3,240 LIABILITIES (by measurement category) Fair value - net income Derivative liabilities - trading (b) $ 395 $ 58 $ 675 — — $ (338 ) (f) $ 395 Fair value - OCI Derivative liabilities - hedging (b)(g) (9 ) — (10 ) — — 1 (f) (9 ) Amortized cost Time deposits (e) 13,245 — 13,331 — — — 13,331 Short-term borrowings (a) 863 14 849 — — — 863 Long-term debt (e) 13,732 12,576 $ 1,211 — — — 13,787 Other Deposits with no stated maturity (a) 94,064 — 94,064 — — — 94,064 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 and Liabilities Measured at Fair Value on a Nonrecurring Basis” in this Note. Investments accounted for under the cost method (or cost less impairment adjusted for observable price changes for certain equity investments) are classified as Level 3 assets. These investments are not actively traded in an open market as sales for these types of investments are rare. The carrying amount of the investments carried at cost are adjusted for declines in value if they are considered to be other-than-temporary (or due to observable orderly transactions of the same issuer for equity investments eligible for the cost less impairment measurement alternative). These adjustments are included in “other income” on the income statement. (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 that 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 the 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. (g) Derivative assets-hedging and derivative liabilities-hedging includes both cash flow and fair value hedges. Additional information regarding our accounting policies for cash flow and fair value hedges is provided in Note 1 (“ 1. Summary of Significant Accounting Policies

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2019
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. March 31, 2019 December 31, 2018 in millions Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value SECURITIES AVAILABLE FOR SALE U.S. Treasury, agencies, and corporations $ 272 — $ 2 $ 270 $ 150 — $ 3 $ 147 States and political subdivisions 6 — — 6 7 — — 7 Agency residential collateralized mortgage obligations 14,277 $ 45 242 14,080 14,315 $ 20 373 13,962 Agency residential mortgage-backed securities 2,138 27 22 2,143 2,128 13 36 2,105 Agency commercial mortgage-backed securities 4,392 46 108 4,330 3,300 19 132 3,187 Other securities 17 8 — 25 17 3 — 20 Total securities available for sale $ 21,102 $ 126 $ 374 $ 20,854 $ 19,917 $ 55 $ 544 $ 19,428 HELD-TO-MATURITY SECURITIES Agency residential collateralized mortgage obligations $ 6,762 6 $ 175 $ 6,593 $ 7,021 2 $ 254 $ 6,769 Agency residential mortgage-backed securities 475 — 6 469 490 $ — 14 476 Agency commercial mortgage-backed securities 3,982 7 69 3,920 3,996 2 133 3,865 Other securities 15 — — 15 12 — — 12 Total held-to-maturity securities $ 11,234 $ 13 $ 250 $ 10,997 $ 11,519 $ 4 $ 401 $ 11,122
Schedule of Unrealized Loss on Investments	The following table summarizes our securities that were in an unrealized loss position as of March 31, 2019 , and December 31, 2018 . Duration of Unrealized Loss Position Less than 12 Months 12 Months or Longer Total in millions Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses March 31, 2019 Securities available for sale: U.S Treasury, agencies, and corporations — — $ 148 $ 2 $ 148 $ 2 Agency residential collateralized mortgage obligations $ 347 $ 1 9,807 241 10,154 242 Agency residential mortgage-backed securities 1 — (a) 1,047 22 1,048 22 Agency commercial mortgage-backed securities — — 1,742 108 1,742 108 Held-to-maturity securities: (a) Agency residential collateralized mortgage obligations 77 — (a) 6,092 175 6,169 175 Agency residential mortgage-backed securities 95 — (a) 374 6 469 6 Agency commercial mortgage-backed securities 203 — (a) 2,593 69 2,796 69 Other securities (a) 3 — (a) — — 3 — Total temporarily impaired securities $ 726 $ 1 $ 21,803 $ 623 $ 22,529 $ 624 December 31, 2018 Securities available for sale: U.S. Treasury, agencies, and corporations — — $ 147 $ 3 $ 147 $ 3 Agency residential collateralized mortgage obligations $ 570 $ 2 10,945 371 11,515 373 Agency residential mortgage-backed securities 4 — (b) 1,087 36 1,091 36 Agency commercial mortgage-backed securities — — 1,729 132 1,729 132 Held-to-maturity securities: Agency residential collateralized mortgage obligations — — 6,416 254 6,416 254 Agency residential mortgage-backed securities — — 475 14 475 14 Agency commercial mortgage-backed securities 73 — (b) 3,359 133 3,432 133 Total temporarily impaired securities $ 647 $ 2 $ 24,158 $ 943 $ 24,805 $ 945 (a) At March 31, 2019 , gross unrealized losses totaled less than $1 million for agency residential mortgage-backed securities available for sale and less than $1 million for all held-to-maturity securities with a loss duration of less than 12 months. (b) At December 31, 2018 , gross unrealized losses totaled less than $1 million for agency residential mortgage-backed securities available for sale with a loss duration of less than 12 months and less than $1 million for agency commercial mortgage-backed securities held-to-maturity with a loss duration of less than 12 months.
Securities by Maturity	The following table shows our securities by remaining maturity. CMOs and other mortgage-backed securities in the available for sale portfolio and 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. March 31, 2019 Securities Available for Sale Held to Maturity Securities in millions Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 271 $ 276 $ 52 $ 52 Due after one through five years 15,750 15,510 6,791 6,647 Due after five through ten years 5,071 5,057 4,391 4,298 Due after ten years 10 11 — — Total $ 21,102 $ 20,854 $ 11,234 $ 10,997

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
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 March 31, 2019 , and December 31, 2018 . The derivative asset and liability balances are presented on a gross basis, prior to the application of bilateral collateral and master netting agreements, but after the variation margin payments with central clearing organizations have been applied as settlement, as applicable. 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. Securities collateral related to legally enforceable master netting agreements is not offset on the balance sheet. Our derivative instruments are included in “accrued income and other assets” or “accrued expenses and other liabilities” on the balance sheet, as follows: March 31, 2019 December 31, 2018 Fair Value Fair Value in millions Notional Amount Derivative Assets Derivative Liabilities Notional Amount Derivative Assets Derivative Liabilities Derivatives designated as hedging instruments: Interest rate $ 32,840 $ 24 $ 10 $ 28,546 $ 50 $ (10 ) Foreign exchange 122 — — 122 2 — Total 32,962 24 10 28,668 52 (10 ) Derivatives not designated as hedging instruments: Interest rate 65,136 505 227 63,454 365 307 Foreign exchange 5,664 76 68 6,829 104 95 Commodity 6,622 233 223 2,002 333 323 Credit 415 1 3 226 1 1 Other (a) 3,266 11 8 1,466 9 7 Total 81,103 826 529 73,977 812 733 Netting adjustments (b) — (324 ) (336 ) — (333 ) (337 ) Net derivatives in the balance sheet 114,065 526 203 102,645 531 386 Other collateral (c) — (2 ) (46 ) — (2 ) (33 ) Net derivative amounts $ 114,065 $ 524 $ 157 $ 102,645 $ 529 $ 353 (a) Other derivatives include interest rate lock commitments and forward sale commitments related to our residential mortgage banking activities, forward purchase and sales contracts consisting of contractual commitments associated with “to be announced” securities and when-issued securities, and other customized derivative contracts. (b) 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. (c)
Pre-Tax Net Gains (Losses) on Fair Value Hedges	The following tables summarize the amounts that were recorded on the balance sheet as of March 31, 2019 , and December 31, 2018 , related to cumulative basis adjustments for fair value hedges. March 31, 2019 in millions Balance sheet line item in which the hedge item is included Carrying amount of hedged item (a) Hedge accounting basis adjustment (b) Interest rate contracts Long-term debt $ 9,400 $ 87 Interest rate contracts Certificate of deposit ($100,000 or more) 340 — Interest rate contracts Other time deposits 176 — December 31, 2018 Balance sheet line item in which the hedge item is included Carrying amount of hedged item (a) Hedge accounting basis adjustment (b) Interest rate contracts Long-term debt $ 9,363 $ (6 ) Interest rate contracts Certificate of deposit ($100,000 or more) 343 (1 ) Interest rate contracts Other time deposits 178 — (a) The carrying amount represents the portion of the liability designated as the hedged item. (b) Basis adjustments related to de-designated hedged items that no longer qualify as fair value hedges reduced the hedge accounting basis adjustment by $10 million and $10 million at March 31, 2019 , and December 31, 2018
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location	The following tables summarize the effect of fair value and cash flow hedge accounting on the income statement for the three- month periods ended March 31, 2019 , and March 31, 2018 . Location and amount of net gains (losses) recognized in income on fair value and cash flow hedging relationships (a) in millions Interest expense – long-term debt Interest income – loans Interest expense - deposits Other income Three months ended March 31, 2019 Total amounts presented in the consolidated statement of income $ (120 ) $ 1,066 $ (202 ) $ 10 Net gains (losses) on fair value hedging relationships Interest contracts Recognized on hedged items (93 ) — — — Recognized on derivatives designated as hedging instruments 82 — — — Net income (expense) recognized on fair value hedges (11 ) — — — Net gain (loss) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from AOCI into net income (1 ) (24 ) — — Net income (expense) recognized on cash flow hedges $ (1 ) $ (24 ) — — Three months ended March 31, 2018 Total amounts presented in the consolidated statement of income $ (92 ) $ 940 $ (91 ) $ 21 Net gains (losses) on fair value hedging relationships Interest contracts Recognized on hedged items 71 — — — Recognized on derivatives designated as hedging instruments (69 ) — — — Net income (expense) recognized on fair value hedges 2 — — — Net gain (loss) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from AOCI into net income (1 ) (2 ) — — Net income (expense) recognized on cash flow hedges $ (1 ) $ (2 ) — — (a) Prior period gain or loss amounts were not restated to conform to the new hedge accounting guidance adopted in 2018.
Derivative Instrument Cash Flow Hedge Earning Recognized by Income Statement Location	The following tables summarize the pre-tax net gains (losses) on our cash flow and net investment hedges for the three- month periods ended March 31, 2019 , and March 31, 2018 , and where they are recorded on the income statement. The table includes net gains (losses) recognized in OCI during the period and net gains (losses) reclassified from OCI into income during the current period. in millions Net Gains (Losses) Recognized in OCI Income Statement Location of Net Gains (Losses) Reclassified From OCI Into Income Net Gains (Losses) Reclassified From OCI Into Income Net Gains (Losses) Recognized in Other Income Three months ended March 31, 2019 Cash Flow Hedges Interest rate $ 115 Interest income — Loans $ (24 ) $ — Interest rate (1 ) Interest expense — Long-term debt (1 ) — Interest rate (5 ) Investment banking and debt placement fees — — Net Investment Hedges Foreign exchange contracts (3 ) Other Income — — Total $ 106 $ (25 ) $ — Three months ended March 31, 2018 Cash Flow Hedges Interest rate $ (88 ) Interest income — Loans $ (2 ) — Interest rate 2 Interest expense — Long-term debt (1 ) — Net Investment Hedges Foreign exchange contracts — Other Income — — Total $ (86 ) $ (3 ) —
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 three- month periods ended March 31, 2019 , and March 31, 2018 , and where they are recorded on the income statement. Three months ended March 31, 2019 Three months ended March 31, 2018 in millions Corporate services income Consumer mortgage income Other income Total Corporate services income Consumer mortgage income Other income Total NET GAINS (LOSSES) Interest rate $ 8 — $ (2 ) $ 6 $ 9 — $ 2 $ 11 Foreign exchange 10 — — 10 11 — — 11 Commodity 1 — — 1 3 — — 3 Credit 1 — (7 ) (6 ) 2 — (5 ) (3 ) Other — — 1 1 — — (4 ) (4 ) Total net gains (losses) $ 20 — $ (8 ) $ 12 $ 25 — $ (7 ) $ 18
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 March 31, 2019 December 31, 2018 Interest rate $ 438 $ 308 Foreign exchange 49 60 Commodity 96 187 Credit — — Other 11 9 Derivative assets before collateral 594 564 Less: Related collateral 68 33 Total derivative assets $ 526 $ 531
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 March 31, 2019 , and December 31, 2018 . The sold credit derivatives represented in the following table include only Risk Participation Agreements; there were no traded indexes sold. The notional amount represents the maximum amount that the seller could be required to pay. The payment/performance risk assessment at March 31, 2019 , is based on the internal probability of default of the reference entity consistent with our Fair Value Methodology. The payment/performance risk shown in the table represents a weighted-average of the default probabilities for all reference entities. These default probabilities are directly correlated to the probability that we will have to make a payment under the credit derivative contracts. March 31, 2019 December 31, 2018 dollars in millions Notional Amount Average Term (Years) Payment / Performance Risk Notional Amount Average Term (Years) Payment / Performance Risk Other $ 64 14.06 2.98 % $ 22 13.43 17.18 % Total credit derivatives sold $ 64 — — $ 22 — —
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 March 31, 2019 , and December 31, 2018 . The additional collateral amounts were calculated based on scenarios under which KeyBank’s ratings are downgraded one, two, or three ratings as of March 31, 2019 , and December 31, 2018 , 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 March 31, 2019 , and December 31, 2018 . 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. March 31, 2019 December 31, 2018 in millions Moody’s S&P Moody’s S&P KeyBank’s long-term senior unsecured credit ratings A3 A- A3 A- One rating downgrade $ 2 $ 2 $ 2 $ 2 Two rating downgrades 2 2 2 2 Three rating downgrades 2 2 2 2

Mortgage Servicing Assets (Tabl

Mortgage Servicing Assets (Tables)	3 Months Ended
	Mar. 31, 2019
Servicing Asset [Abstract]
Changes in Carrying Amount of Mortgage Servicing Assets	Changes in the carrying amount of residential mortgage servicing assets are summarized as follows: Three months ended March 31, in millions 2019 2018 Balance at beginning of period $ 37 $ 31 Servicing retained from loan sales 2 2 Purchases — — Amortization (1 ) (1 ) Balance at end of period $ 38 $ 32 Fair value at end of period $ 50 $ 42 Three months ended March 31, in millions 2019 2018 Balance at beginning of period $ 502 $ 412 Servicing retained from loan sales 18 27 Purchases 6 21 Amortization (29 ) (25 ) Balance at end of period $ 497 $ 435 Fair value at end of period $ 727 $ 537
Schedule of Range and Weighted-Average of Significant Unobservable Inputs	The range and weighted average of the significant unobservable inputs used to determine the fair value of our commercial mortgage servicing assets at March 31, 2019 , and March 31, 2018 , along with the valuation techniques, are shown in the following table: dollars in millions March 31, 2019 March 31, 2018 Valuation Technique Significant Unobservable Input Range (Weighted Average) Discounted cash flow Expected defaults 1.00 - 2.00% (1.14%) 1.00 - 3.00% (1.18%) Residual cash flows discount rate 7.00 - 15.00% (9.19%) 7.00 - 15.00% (8.99%) Escrow earn rate 2.22 - 3.70% (2.98%) 2.17 - 3.45% (2.84%) Loan assumption rate 0.00 - 3.18% (1.39%) 0.00 - 2.84% (1.18%) March 31, 2019 , and March 31, 2018 , along with the valuation techniques, are shown in the following table: dollars in millions March 31, 2019 March 31, 2018 Valuation Technique Significant Unobservable Input Range (Weighted Average) Discounted cash flow Prepayment speed 9.32 - 58.76% (9.93%) 8.37 - 48.63% (9.12%) Discount rate 7.50 - 10.00% (7.54%) 8.50 - 11.00% (8.54%) Servicing cost $62 - $4,375 ($68.23) $76 - $4,385 ($83.05)

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2019
Leases [Abstract]
Components of Lease Expense	Information pertaining to the lease term and weighted-average discount rate is summarized as follows: March 31, 2019 Weighted-average remaining lease term: Operating leases 7.9 years Finance leases 7.6 years Weighted-average discount rate: Operating leases 3.28 % Finance leases 4.12 % Three months ended March 31, in millions 2019 (a), (b) Operating lease cost $ 34 Variable lease cost 5 Total lease cost $ 39 (a) The amortization of right-of-use assets and interest on lease liabilities for finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) Short-term lease cost was less than less than $1 million for the three months ended March 31, 2019
Summary of Cash Flows Related to Leases	Cash flows related to leases are summarized as follows: Three months ended March 31, in millions 2019 (a), (b) Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 36 Right-of-use assets obtained in exchange for lease obligations: Operating leases $ 28 (a) Operating and financing cash flows from finance leases were each less than $1 million for the three months ended March 31, 2019 . (b) There were no right-of-use assets obtained in exchange for finance lease obligations for the three months ended March 31, 2019
Summary of Additional Balance Sheet Information Related to Leases	Additional balance sheet information related to leases is summarized as follows: March 31, in millions Balance sheet classification 2019 Operating lease assets Accrued income and other assets $ 694 Operating lease liabilities Accrued expense and other liabilities 787 Finance leases: Property and equipment, gross Premises and equipment 28 Accumulated depreciation Premises and equipment (16 ) Property and equipment, net 12 Finance lease liabilities Long-term debt 15
Finance Lease, Maturities of Lease Liabilities	Maturities of lease liabilities are summarized as follows: in millions Operating Leases Finance Leases Total 2019 $ 108 $ 2 $ 110 2020 139 3 142 2021 123 3 126 2022 108 3 111 2023 93 2 95 Thereafter 332 5 337 Total lease payments 903 18 921 Less imputed interest 116 3 119 Total $ 787 $ 15 $ 802
Lessee, Operating Lease, Maturities of Lease Liabilities	Maturities of lease liabilities are summarized as follows: in millions Operating Leases Finance Leases Total 2019 $ 108 $ 2 $ 110 2020 139 3 142 2021 123 3 126 2022 108 3 111 2023 93 2 95 Thereafter 332 5 337 Total lease payments 903 18 921 Less imputed interest 116 3 119 Total $ 787 $ 15 $ 802
Operating Lease, Lease Income	The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2019 Sales-type and direct financing leases Interest income on lease receivable $ 30 Interest income related to accretion of unguaranteed residual asset 3 Interest income on deferred fees and costs — Total sales-type and direct financing lease income 33 Operating leases Operating lease income related to lease payments 33 Other operating leasing gains 4 Total operating lease income and other leasing gains 37 Total lease income $ 70
Sales-type Lease, Lease Income	The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2019 Sales-type and direct financing leases Interest income on lease receivable $ 30 Interest income related to accretion of unguaranteed residual asset 3 Interest income on deferred fees and costs — Total sales-type and direct financing lease income 33 Operating leases Operating lease income related to lease payments 33 Other operating leasing gains 4 Total operating lease income and other leasing gains 37 Total lease income $ 70
Direct Financing Lease, Lease Income	The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2019 Sales-type and direct financing leases Interest income on lease receivable $ 30 Interest income related to accretion of unguaranteed residual asset 3 Interest income on deferred fees and costs — Total sales-type and direct financing lease income 33 Operating leases Operating lease income related to lease payments 33 Other operating leasing gains 4 Total operating lease income and other leasing gains 37 Total lease income $ 70
Composition of Net Investment in Sales-Type and Direct Financing Leases	The composition of the net investment in sales-type and direct financing leases is as follows: in millions March 31, 2019 Lease receivables $ 3,597 Unearned income (346 ) Unguaranteed residual value 428 Deferred fees and costs 17 Net investment in sales-type and direct financing leases $ 3,696
Minimum Future Lease Payments to be Received for Sales-Type and Direct Financing Leases	At March 31, 2019 , minimum future lease payments to be received for sales-type and direct financing leases are as follows: in millions Sales-type and direct financing lease payments 2019 $ 843 2020 928 2021 659 2022 435 2023 269 Thereafter 463 Total lease payments 3,597
Minimum Future Lease Payments to be Received for Operating Leases	At March 31, 2019 , minimum future lease payments to be received for operating leases are as follows: in millions Operating lease payments 2019 $ 97 2020 121 2021 103 2022 87 2023 73 Thereafter 217 Total lease payments $ 698

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	3 Months Ended
	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities Information	The assets and liabilities presented in the table below convey the size of KCDC’s direct and indirect investments at March 31, 2019 , and December 31, 2018 . As these investments represent unconsolidated VIEs, the assets and liabilities of the investments themselves are not recorded on our balance sheet. Additional information pertaining to our LIHTC investments is included in Note 12 (“ Variable Interest Entities “) beginning on page 142 of our 2018 Form 10-K. Unconsolidated VIEs in millions Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2019 LIHTC investments $ 5,948 $ 2,568 $ 1,715 December 31, 2018 LIHTC investments $ 5,932 $ 2,569 $ 1,740 March 31, 2019 , and December 31, 2018 . Unconsolidated VIEs in millions Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2019 Indirect investments $ 16,285 $ 299 $ 108 December 31, 2018 Indirect investments $ 19,659 $ 376 $ 122

Securities Financing Activiti_2

Securities Financing Activities (Tables)	3 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
Summarized Securities Financing Agreements	The following table summarizes our securities financing agreements at March 31, 2019 , and December 31, 2018 : March 31, 2019 December 31, 2018 in millions Gross Amount Presented in Balance Sheet Netting Adjustments (a) Collateral (b) Net Amounts Gross Amount Presented in Balance Sheet Netting Adjustments (a) Collateral (b) Net Amounts Offsetting of financial assets: Reverse repurchase agreements $ 12 $ (5 ) $ (7 ) — $ 14 $ (14 ) — — Total $ 12 $ (5 ) $ (7 ) — $ 14 $ (14 ) — — Offsetting of financial liabilities: Repurchase agreements (c) $ 266 $ (5 ) $ (261 ) — $ 319 $ (14 ) $ (305 ) — Total $ 266 $ (5 ) $ (261 ) — $ 319 $ (14 ) $ (305 ) — (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)

Employee Benefits (Tables)

Employee Benefits (Tables)	3 Months Ended
	Mar. 31, 2019
Retirement Benefits [Abstract]
Net Pension Cost (Benefit) for All Funded and Unfunded Plans	The components of net pension cost (benefit) for all funded and unfunded plans are recorded in “other expense” and are summarized in the following table. For more information on our Pension Plans and Other Postretirement Benefit Plans, see Note 17 (“ Employee Benefits ”) beginning on page 151 of our 2018 Form 10-K. Three months ended March 31, in millions 2019 2018 Interest cost on PBO $ 11 $ 10 Expected return on plan assets (12 ) (13 ) Amortization of losses 4 4 Net pension cost $ 3 $ 1

Trust Preferred Securities Is_2

Trust Preferred Securities Issued by Unconsolidated Subsidiaries (Tables)	3 Months Ended
	Mar. 31, 2019
Banking and Thrift [Abstract]
Summary of Trust Preferred Securities, Common Stock and Related Debentures	The trust preferred securities, common stock, and related debentures are summarized as follows: dollars in millions Trust Preferred Securities, Net of Discount (a) Common Stock Principal Amount of Debentures, Net of Discount (b) Interest Rate of Trust Preferred Securities and Debentures (c) Maturity of Trust Preferred Securities and Debentures March 31, 2019 KeyCorp Capital I $ 156 $ 6 $ 162 3.537 % 2028 KeyCorp Capital II 102 4 106 6.875 2029 KeyCorp Capital III 134 4 138 7.750 2029 HNC Statutory Trust III 19 1 20 4.051 2035 Willow Grove Statutory Trust I 18 1 19 3.921 2036 HNC Statutory Trust IV 16 1 17 4.031 2037 Westbank Capital Trust II 7 — 7 4.823 2034 Westbank Capital Trust III 7 — 7 4.823 2034 Total $ 459 $ 17 $ 476 5.604 % — December 31, 2018 $ 454 $ 17 $ 471 5.447 % — (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 $51 million at March 31, 2019 , and $46 million at December 31, 2018 . 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, HNC Statutory Trust III, Willow Grove Statutory Trust I, HNC Statutory Trust IV, Westbank Capital Trust II, or Westbank Capital Trust III 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 $51 million at March 31, 2019 , and $46 million at December 31, 2018 . See Note 7 (“ Derivatives and Hedging Activities ”) 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)

Contingent Liabilities and Gu_2

Contingent Liabilities and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Guarantees	The following table shows the types of guarantees that we had outstanding at March 31, 2019 . 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 106 of our 2018 Form 10-K. March 31, 2019 Maximum Potential Undiscounted Future Payments Liability Recorded in millions Financial guarantees: Standby letters of credit $ 3,112 $ 76 Recourse agreement with FNMA 4,185 6 Residential mortgage reserve 1,576 6 Written put options (a) 3,065 46 Total $ 11,938 $ 134 (a)

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Changes in AOCI	Our changes in AOCI for the three months ended March 31, 2019 , and March 31, 2018 , are as follows: in millions Unrealized gains (losses) on securities available for sale Unrealized gains (losses) on derivative financial instruments Foreign currency translation adjustment Net pension and postretirement benefit costs Total Balance at December 31, 2018 $ (373 ) $ (50 ) $ (14 ) $ (381 ) $ (818 ) Other comprehensive income before reclassification, net of income taxes 184 80 3 (1 ) 266 Amounts reclassified from AOCI, net of income taxes (a) — 19 — 3 22 Net current-period other comprehensive income, net of income taxes 184 99 3 2 288 Balance at March 31, 2019 $ (189 ) $ 49 $ (11 ) $ (379 ) $ (530 ) Balance at December 31, 2017 $ (311 ) $ (86 ) $ 9 $ (391 ) $ (779 ) Other comprehensive income before reclassification, net of income taxes (150 ) (65 ) (2 ) — (217 ) Amounts reclassified from AOCI, net of income taxes (a) — 2 — 3 5 Net current-period other comprehensive income, net of income taxes (150 ) (63 ) (2 ) 3 (212 ) Balance at March 31, 2018 $ (461 ) $ (149 ) $ 7 $ (388 ) $ (991 ) (a)
Reclassifications Out of AOCI	Our reclassifications out of AOCI for the three months ended March 31, 2019 , and March 31, 2018 , are as follows: Three months ended March 31, Affected Line Item in the Statement Where Net Income is Presented in millions 2019 2018 Unrealized gains (losses) on derivative financial instruments Interest rate $ (24 ) $ (2 ) Interest income — Loans Interest rate (1 ) (1 ) Interest expense — Long-term debt (25 ) (3 ) Income (loss) from continuing operations before income taxes (6 ) (1 ) Income taxes $ (19 ) $ (2 ) Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (4 ) $ (4 ) Personnel expense (4 ) (4 ) Income (loss) from continuing operations before income taxes (1 ) (1 ) Income taxes $ (3 ) $ (3 ) Income (loss) from continuing operations

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2019
Equity [Abstract]
Schedule of Stockholders Equity	Preferred stock series Amount outstanding (in millions) Shares authorized and outstanding Par value Liquidation preference Ownership interest per depositary share Liquidation preference per depositary share First quarter 2019 dividends paid per depositary share Fixed-to-Floating Rate Perpetual Noncumulative Series D $ 525 21,000 $ 1 $ 25,000 1/25th $ 1,000 $ 12.50 Fixed-to-Floating Rate Perpetual Noncumulative Series E 500 500,000 1 1,000 1/40th 25 .382813 Fixed Rate Perpetual Noncumulative Series F 425 425,000 1 1,000 1/40th 25 .353125

Business Segment Reporting (Tab

Business Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2019
Segment Reporting [Abstract]
Financial Information of Business Groups	The table below shows selected financial data for our business segments for the three- month periods ended March 31, 2019 , and March 31, 2018 . Three months ended March 31, Consumer Bank Commercial Bank Other Total Key dollars in millions 2019 2018 2019 2018 2019 2018 2019 2018 SUMMARY OF OPERATIONS Net interest income (TE) $ 594 $ 553 $ 399 $ 405 $ (8 ) $ (6 ) $ 985 $ 952 Noninterest income 214 229 300 325 22 47 536 601 Total revenue (TE) (a) 808 782 699 730 14 41 1,521 1,553 Provision for credit losses 45 34 15 28 2 (1 ) 62 61 Depreciation and amortization expense 23 27 29 35 36 41 88 103 Other noninterest expense 524 549 338 346 13 8 875 903 Income (loss) from continuing operations before income taxes (TE) 216 172 317 321 (37 ) (7 ) 496 486 Allocated income taxes and TE adjustments 52 41 64 45 (26 ) (16 ) 90 70 Income (loss) from continuing operations 164 131 253 276 (11 ) 9 406 416 Income (loss) from discontinued operations, net of taxes — — — — 1 2 1 2 Net income (loss) 164 131 253 276 (10 ) 11 407 418 Less: Net income (loss) attributable to noncontrolling interests — — — — — — — — Net income (loss) attributable to Key $ 164 $ 131 $ 253 $ 276 $ (10 ) $ 11 $ 407 $ 418 AVERAGE BALANCES (b) Loans and leases $ 31,403 $ 31,647 $ 57,210 $ 54,131 $ 1,036 $ 1,149 $ 89,649 $ 86,927 Total assets (a) 34,814 34,802 64,817 61,750 40,489 38,363 140,120 134,915 Deposits 71,289 67,421 34,418 32,794 1,869 2,341 107,576 102,556 OTHER FINANCIAL DATA Net loan charge-offs (b) $ 34 $ 35 $ 30 $ 19 — — $ 64 $ 54 Return on average allocated equity (b) 19.83 % 16.41 % 23.66 % 25.31 % (.56 )% .50 % 10.49 % 11.33 % Return on average allocated equity 19.83 16.41 23.66 25.31 (.51 ) .62 10.51 11.39 Average full-time equivalent employees (c) 9,631 10,106 2,360 2,457 5,563 5,977 17,554 18,540 (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)

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2019
Revenue from Contract with Customer [Abstract]
Disaggregation of Revenue	The following table represents a disaggregation of revenue from contracts with customers, by business segment, for the three- month periods ended March 31, 2019 , and March 31, 2018 . Refer to Note 19 (“ Business Segment Reporting ”) for a description of the company-wide organizational change which occurred in the first quarter of 2019 resulting in the realignment of Key’s businesses into two reportable business segments, Consumer Bank and Commercial Bank. Prior period information was restated to conform to the new business segment structure. Three months ended March 31, 2019 Three months ended March 31, 2018 dollars in millions Consumer Bank Commercial Bank Total Contract Revenue Consumer Bank Commercial Bank Total Contract Revenue NONINTEREST INCOME Trust and investment services income $ 85 $ 15 $ 100 $ 99 $ 20 $ 119 Investment banking and debt placement fees — 45 45 — 47 47 Services charges on deposit accounts 60 27 87 61 28 89 Cards and payments income 38 26 64 34 26 60 Other noninterest income 3 — 3 5 — 5 Total revenue from contracts with customers $ 186 $ 113 $ 299 $ 199 $ 121 $ 320 Other noninterest income (a) $ 215 $ 234 Noninterest income from Other (b) 22 47 Total noninterest income $ 536 $ 601 (a) Noninterest income considered earned outside the scope of contracts with customers. (b) Other includes other segments that consists of corporate treasury, our principal investing unit, and various exit portfolios as well as reconciling items which primarily represents 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. Refer to Note 19 (“ Business Segment Reporting

Basis of Presentation and Acc_4

Basis of Presentation and Accounting Policies - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets	$ 694
Operating lease liabilities	$ 787
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets		$ 710
Operating lease liabilities		$ 710

Earnings Per Common Share - Bas

Earnings Per Common Share - Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
EARNINGS
Income (loss) from continuing operations		$ 406	$ 416
Less: Net income (loss) attributable to noncontrolling interests		0	0
Income (loss) from continuing operations attributable to Key		406	416
Less: Dividends on Preferred Stock		20	14
Income (loss) from continuing operations attributable to Key common shareholders		386	402
Income (loss) from discontinued operations, net of taxes		1	2
Net income (loss) attributable to Key common shareholders		$ 387	$ 404
WEIGHTED-AVERAGE COMMON SHARES
Weighted-average common shares outstanding (000) (in shares)		1,006,717	1,056,037
Effect of common share options and other stock awards (in shares)		9,787	15,749
Weighted-average common shares and potential common shares outstanding (in shares)	[1]	1,016,504	1,071,786
EARNINGS PER COMMON SHARE
Income (loss) from continuing operations attributable to Key common shareholders (in usd per share)		$ 0.38	$ 0.38
Income (loss) from discontinued operations, net of taxes (in usd per share)		0	0
Net income (loss) attributable to Key common shareholders (in usd per share)	[2]	0.38	0.38
Income (loss) from continuing operations attributable to Key common shareholders - assuming dilution (in usd per share)		0.38	0.38
Income (loss) from discontinued operations, net of taxes - assuming dilution (in usd per share)		0	0
Net income (loss) attributable to Key common shareholders (in usd per share)	[2]	$ 0.38	$ 0.38
[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.

Loan Portfolio - Loans by Categ

Loan Portfolio - Loans by Category (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Residential — prime loans:
Total loans	$ 90,178	$ 89,552
Commercial lease financing includes receivables held as collateral for secured borrowing	12	10
Loans	89,295	88,669
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	46,474	45,753
Commercial real estate:
Commercial mortgage	14,344	14,285
Construction	1,420	1,666
Total commercial real estate loans	15,764	15,951
Commercial lease financing	4,507	4,606
Total commercial/consumer loans	66,745	66,310
Residential — prime loans:
Total loans	66,745	66,310
Consumer Portfolio Segment [Member]
Commercial real estate:
Total commercial/consumer loans	23,433	23,242
Residential — prime loans:
Real estate — residential mortgage	5,615	5,513
Home equity loans	10,846	11,142
Total residential — prime loans	16,461	16,655
Consumer direct loans	2,165	1,809
Credit cards	1,086	1,144
Consumer indirect loans	3,721	3,634
Total loans	23,433	23,242
Commercial Credit Card [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial and industrial	135	132
Education Lending [Member] | Discontinued Operations [Member]
Residential — prime loans:
Loans	$ 1,000	$ 1,100

Asset Quality - Financing Recei

Asset Quality - Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 90,178	$ 89,552
Consumer Portfolio Segment, PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	320	334
Consumer Portfolio Segment, PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	317	331
Consumer Portfolio Segment, PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3	3
Consumer Portfolio Segment, PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer Portfolio Segment, PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer Portfolio Segment Excluding PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,113	22,908
Consumer Portfolio Segment Excluding PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	16,144	16,324
Consumer Portfolio Segment Excluding PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,162	1,806
Consumer Portfolio Segment Excluding PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,086	1,144
Consumer Portfolio Segment Excluding PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,721	3,634
Commercial Portfolio Segment Excluding PCI Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	66,514	66,069
Commercial Portfolio Segment Excluding PCI Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	64,253	63,904
Commercial Portfolio Segment Excluding PCI Loans [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,997	1,922
Commercial Portfolio Segment Excluding PCI Loans [Member] | Criticized (Nonaccruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	264	243
Commercial Portfolio Segment Excluding PCI Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	46,416	45,692
Commercial Portfolio Segment Excluding PCI Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	44,691	44,138
Commercial Portfolio Segment Excluding PCI Loans [Member] | Commercial and Industrial [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,555	1,402
Commercial Portfolio Segment Excluding PCI Loans [Member] | Commercial and Industrial [Member] | Criticized (Nonaccruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	170	152
Commercial Portfolio Segment Excluding PCI Loans [Member] | RE Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,172	14,107
Commercial Portfolio Segment Excluding PCI Loans [Member] | RE Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,734	13,672
Commercial Portfolio Segment Excluding PCI Loans [Member] | RE Commercial [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	355	354
Commercial Portfolio Segment Excluding PCI Loans [Member] | RE Commercial [Member] | Criticized (Nonaccruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	83	81
Commercial Portfolio Segment Excluding PCI Loans [Member] | RE Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,419	1,664
Commercial Portfolio Segment Excluding PCI Loans [Member] | RE Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,362	1,537
Commercial Portfolio Segment Excluding PCI Loans [Member] | RE Construction [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	55	125
Commercial Portfolio Segment Excluding PCI Loans [Member] | RE Construction [Member] | Criticized (Nonaccruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2	2
Commercial Portfolio Segment Excluding PCI Loans [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,507	4,606
Commercial Portfolio Segment Excluding PCI Loans [Member] | Commercial Leases [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,466	4,557
Commercial Portfolio Segment Excluding PCI Loans [Member] | Commercial Leases [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	32	41
Commercial Portfolio Segment Excluding PCI Loans [Member] | Commercial Leases [Member] | Criticized (Nonaccruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	9	8
Commercial Portfolio Segment, PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	231	241
Commercial Portfolio Segment, PCI [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	162	164
Commercial Portfolio Segment, PCI [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	69	77
Commercial Portfolio Segment, PCI [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	58	61
Commercial Portfolio Segment, PCI [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	36	37
Commercial Portfolio Segment, PCI [Member] | Commercial and Industrial [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	22	24
Commercial Portfolio Segment, PCI [Member] | RE Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	172	178
Commercial Portfolio Segment, PCI [Member] | RE Commercial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	125	125
Commercial Portfolio Segment, PCI [Member] | RE Commercial [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	47	53
Commercial Portfolio Segment, PCI [Member] | RE Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1	2
Commercial Portfolio Segment, PCI [Member] | RE Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1	2
Commercial Portfolio Segment, PCI [Member] | RE Construction [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment, PCI [Member] | Commercial Leases [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment, PCI [Member] | Commercial Leases [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Portfolio Segment, PCI [Member] | Commercial Leases [Member] | Criticized (Accruing) [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment, PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	126	137
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment, PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	126	137
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment Excluding PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	12,522	12,511
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	9,818	9,794
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	548	549
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	477	521
FICO Score, 750 and Above [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,679	1,647
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment, PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	96	96
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment, PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	95	95
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1	1
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment Excluding PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,212	7,433
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,690	4,906
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	683	700
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	485	507
FICO Score, 660 to 749 [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,354	1,320
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment, PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	92	99
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment, PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	90	97
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2	2
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment Excluding PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,291	2,316
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,394	1,411
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	217	224
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	124	116
FICO Score, Less than 660 [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	556	565
FICO Score, No Score [Member] | Consumer Portfolio Segment, PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6	2
FICO Score, No Score [Member] | Consumer Portfolio Segment, PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	6	2
FICO Score, No Score [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, No Score [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, No Score [Member] | Consumer Portfolio Segment, PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, No Score [Member] | Consumer Portfolio Segment Excluding PCI [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,088	648
FICO Score, No Score [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Residential Prime Financing Receivables [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	242	213
FICO Score, No Score [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Direct Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	714	333
FICO Score, No Score [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Credit Card [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
FICO Score, No Score [Member] | Consumer Portfolio Segment Excluding PCI [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 132	$ 102

Asset Quality - Aging Analysis

Asset Quality - Aging Analysis of Past Due and Current Loans (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 88,671	$ 88,011
Days Past Due	956	966
Non-performing Loans	548	542
Purchased Credit Impaired	551	575
Total loans	90,178	89,552
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	65,986	65,558
Days Past Due	528	511
Non-performing Loans	263	244
Purchased Credit Impaired	231	241
Total loans	66,745	66,310
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	22,685	22,453
Days Past Due	428	455
Non-performing Loans	285	298
Purchased Credit Impaired	320	334
Total loans	23,433	23,242
Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	46,063	45,375
Days Past Due	353	317
Non-performing Loans	170	152
Purchased Credit Impaired	58	61
Total loans	46,474	45,753
Commercial Real Estate: Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	14,056	13,957
Days Past Due	116	150
Non-performing Loans	82	81
Purchased Credit Impaired	172	178
Total loans	14,344	14,285
Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,404	1,646
Days Past Due	15	18
Non-performing Loans	2	2
Purchased Credit Impaired	1	2
Total loans	1,420	1,666
Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	15,460	15,603
Days Past Due	131	168
Non-performing Loans	84	83
Purchased Credit Impaired	173	180
Total loans	15,764	15,951
Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	4,463	4,580
Days Past Due	44	26
Non-performing Loans	9	9
Purchased Credit Impaired	0	0
Total loans	4,507	4,606
Real Estate - Residential Mortgage [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	5,234	5,119
Days Past Due	80	80
Non-performing Loans	64	62
Purchased Credit Impaired	301	314
Total loans	5,615	5,513
Home Equity Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,583	10,862
Days Past Due	247	263
Non-performing Loans	195	210
Purchased Credit Impaired	16	17
Total loans	10,846	11,142
Consumer Direct Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,141	1,780
Days Past Due	21	26
Non-performing Loans	3	4
Purchased Credit Impaired	3	3
Total loans	2,165	1,809
Consumer Credit Card Financing Receivable [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	1,061	1,119
Days Past Due	25	25
Non-performing Loans	3	2
Purchased Credit Impaired	0	0
Total loans	1,086	1,144
Consumer Indirect Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,666	3,573
Days Past Due	55	61
Non-performing Loans	20	20
Purchased Credit Impaired	0	0
Total loans	3,721	3,634
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	193	218
30-59 Days Past Due [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	113	128
30-59 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	80	90
30-59 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	79	89
30-59 Days Past Due [Member] | Commercial Real Estate: Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	10	27
30-59 Days Past Due [Member] | Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	6	0
30-59 Days Past Due [Member] | Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	16	27
30-59 Days Past Due [Member] | Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	18	12
30-59 Days Past Due [Member] | Real Estate - Residential Mortgage [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	9	11
30-59 Days Past Due [Member] | Home Equity Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	31	31
30-59 Days Past Due [Member] | Consumer Direct Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	7	11
30-59 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	7	6
30-59 Days Past Due [Member] | Consumer Indirect Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	26	31
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	97	94
60-89 Days Past Due [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	66	62
60-89 Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	31	32
60-89 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	47	31
60-89 Days Past Due [Member] | Commercial Real Estate: Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	7	17
60-89 Days Past Due [Member] | Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	0	13
60-89 Days Past Due [Member] | Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	7	30
60-89 Days Past Due [Member] | Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	12	1
60-89 Days Past Due [Member] | Real Estate - Residential Mortgage [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	4	3
60-89 Days Past Due [Member] | Home Equity Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	12	12
60-89 Days Past Due [Member] | Consumer Direct Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	4	5
60-89 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	4	5
60-89 Days Past Due [Member] | Consumer Indirect Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	7	7
90 and Greater Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	118	112
90 and Greater Days Past Due [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	86	77
90 and Greater Days Past Due [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	32	35
90 and Greater Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	57	45
90 and Greater Days Past Due [Member] | Commercial Real Estate: Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	17	25
90 and Greater Days Past Due [Member] | Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	7	3
90 and Greater Days Past Due [Member] | Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	24	28
90 and Greater Days Past Due [Member] | Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	5	4
90 and Greater Days Past Due [Member] | Real Estate - Residential Mortgage [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	3	4
90 and Greater Days Past Due [Member] | Home Equity Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	9	10
90 and Greater Days Past Due [Member] | Consumer Direct Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	7	6
90 and Greater Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	11	12
90 and Greater Days Past Due [Member] | Consumer Indirect Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Days Past Due	$ 2	$ 3

Asset Quality - Additional Info

Asset Quality - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019USD ($)SecurityLoan	Mar. 31, 2018USD ($)SecurityLoan	Dec. 31, 2018USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision (credit) for losses on lending-related commitments	$ (2)	$ 3
Percentage of carrying amount of our commercial nonperforming loans outstanding	79.00%
Percentage of nonperforming loans outstanding face value	82.00%
Percentage of loans held for sale and other nonperforming assets	86.00%
Net reduction to interest income	$ 8	7
Interest income recognized on outstanding balances	3	2
Commitments outstanding to lend additional funds to borrowers	4		$ 5
Financial receivable, modifications, subsequent default, recorded investment	2	$ 1
Other real estate owned nonperforming loan	$ 40		35
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	0	0
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | SecurityLoan	74	41
Real Estate - Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivable, modifications, subsequent default, recorded investment	$ 96		113
Foreclosed Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other real estate owned nonperforming loan	$ 39		$ 35

Asset Quality - Breakdown of In

Asset Quality - Breakdown of Individually Impaired Loans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	$ 264		$ 238
With related allowance recorded, Recorded Investment	185		209
Recorded Investment	449		447
With no related allowance recorded, Unpaid Principal Balance	318		311
With related allowance recorded, Unpaid Principal Balance	230		245
Unpaid Principal Balance	548		556
Specific Allowance	16		19
Average Recorded Investment	448	$ 376
Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	211		182
With related allowance recorded, Recorded Investment	19		46
With no related allowance recorded, Unpaid Principal Balance	254		245
With related allowance recorded, Unpaid Principal Balance	33		50
Specific Allowance	2		6
Average Recorded Investment	229	165
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	53		56
With related allowance recorded, Recorded Investment	166		163
With no related allowance recorded, Unpaid Principal Balance	64		66
With related allowance recorded, Unpaid Principal Balance	197		195
Specific Allowance	14		13
Average Recorded Investment	219	211
Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	152		118
With related allowance recorded, Recorded Investment	17		44
With no related allowance recorded, Unpaid Principal Balance	184		175
With related allowance recorded, Unpaid Principal Balance	30		47
Specific Allowance	2		5
Average Recorded Investment	165	153
Commercial Real Estate: Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	59		64
With related allowance recorded, Recorded Investment	2		2
With no related allowance recorded, Unpaid Principal Balance	70		70
With related allowance recorded, Unpaid Principal Balance	3		3
Specific Allowance	0		1
Average Recorded Investment	64	12
Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	59		64
With related allowance recorded, Recorded Investment	2		2
With no related allowance recorded, Unpaid Principal Balance	70		70
With related allowance recorded, Unpaid Principal Balance	3		3
Specific Allowance	0		1
Average Recorded Investment	64	12
Real Estate - Residential Mortgage [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	4		4
With related allowance recorded, Recorded Investment	43		45
With no related allowance recorded, Unpaid Principal Balance	5		5
With related allowance recorded, Unpaid Principal Balance	68		70
Specific Allowance	3		3
Average Recorded Investment	48	49
Home Equity Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	47		49
With related allowance recorded, Recorded Investment	81		78
With no related allowance recorded, Unpaid Principal Balance	54		56
With related allowance recorded, Unpaid Principal Balance	87		85
Specific Allowance	8		8
Average Recorded Investment	128	120
Consumer Direct Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	0		1
With related allowance recorded, Recorded Investment	4		3
With no related allowance recorded, Unpaid Principal Balance	1		1
With related allowance recorded, Unpaid Principal Balance	4		3
Specific Allowance	0		0
Average Recorded Investment	4	4
Consumer Indirect Loans [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With no related allowance recorded, Recorded Investment	2		2
With related allowance recorded, Recorded Investment	35		34
With no related allowance recorded, Unpaid Principal Balance	4		4
With related allowance recorded, Unpaid Principal Balance	35		34
Specific Allowance	3		2
Average Recorded Investment	36	35
Credit Cards [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
With related allowance recorded, Recorded Investment	3		3
With related allowance recorded, Unpaid Principal Balance	3		3
Specific Allowance	0		$ 0
Average Recorded Investment	$ 3	$ 3

Asset Quality - Post-Modificati

Asset Quality - Post-Modification Outstanding Recorded Investment by Concession Type for Our Commercial Accruing and Nonaccruing TDRs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Modifications [Line Items]
Total commercial and consumer TDRs	$ 13	$ 21
Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Extension of Maturity Date	0	1
Total	0	1
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Interest rate reduction	4	8
Other	9	12
Total	$ 13	$ 20

Asset Quality - Summary of Post

Asset Quality - Summary of Post-Modification Outstanding Recorded Investment TDRs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivables, Modifications, Rollforward [Roll Forward]
Balance at beginning of the period	$ 399	$ 317
Additions	14	21
Payments	(39)	(19)
Charge-offs	(9)	(2)
Balance at end of period	$ 365	$ 317

Asset Quality - Breakdown of No

Asset Quality - Breakdown of Nonperforming TDRs by Loans Category (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)SecurityLoan	Mar. 31, 2018USD ($)SecurityLoan
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	6,147	6,084
Pre-modification Outstanding Recorded Investment	$ 460	$ 491
Post-modification Outstanding Recorded Investment	$ 365	$ 399
Prior-Year Accruing [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	3,626	3,021
Pre-modification Outstanding Recorded Investment	$ 214	$ 195
Post-modification Outstanding Recorded Investment	$ 167	$ 152
Prior-Year Accruing [Member] | Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	10	13
Pre-modification Outstanding Recorded Investment	$ 38	$ 37
Post-modification Outstanding Recorded Investment	$ 31	$ 32
Prior-Year Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1	2
Pre-modification Outstanding Recorded Investment	$ 0	$ 0
Post-modification Outstanding Recorded Investment	$ 0	$ 0
Prior-Year Accruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	3,616	3,008
Pre-modification Outstanding Recorded Investment	$ 176	$ 158
Post-modification Outstanding Recorded Investment	$ 136	$ 120
Nonperforming [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	2,521	3,063
Pre-modification Outstanding Recorded Investment	$ 246	$ 296
Post-modification Outstanding Recorded Investment	$ 198	$ 247
Nonperforming [Member] | Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	34	41
Pre-modification Outstanding Recorded Investment	$ 155	$ 187
Post-modification Outstanding Recorded Investment	$ 115	$ 147
Nonperforming [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	2,487	3,022
Pre-modification Outstanding Recorded Investment	$ 91	$ 109
Post-modification Outstanding Recorded Investment	$ 83	$ 100
Commercial and Industrial [Member] | Prior-Year Accruing [Member] | Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	9	11
Pre-modification Outstanding Recorded Investment	$ 38	$ 37
Post-modification Outstanding Recorded Investment	$ 31	$ 32
Commercial and Industrial [Member] | Prior-Year Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1	2
Pre-modification Outstanding Recorded Investment	$ 0	$ 0
Post-modification Outstanding Recorded Investment	$ 0	$ 0
Commercial and Industrial [Member] | Nonperforming [Member] | Commercial Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	27	35
Pre-modification Outstanding Recorded Investment	$ 89	$ 121
Post-modification Outstanding Recorded Investment	$ 57	$ 85
Commercial Real Estate: Commercial Mortgage [Member] | Nonperforming [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	7	6
Pre-modification Outstanding Recorded Investment	$ 66	$ 66
Post-modification Outstanding Recorded Investment	$ 58	$ 62
Commercial Real Estate Loans [Member] | Nonperforming [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	7	6
Pre-modification Outstanding Recorded Investment	$ 66	$ 66
Post-modification Outstanding Recorded Investment	$ 58	$ 62
Real Estate - Residential Mortgage [Member] | Prior-Year Accruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	481	491
Pre-modification Outstanding Recorded Investment	$ 35	$ 36
Post-modification Outstanding Recorded Investment	$ 30	$ 30
Real Estate - Residential Mortgage [Member] | Nonperforming [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	284	281
Pre-modification Outstanding Recorded Investment	$ 20	$ 21
Post-modification Outstanding Recorded Investment	$ 18	$ 20
Home Equity Loans [Member] | Prior-Year Accruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	1,648	1,403
Pre-modification Outstanding Recorded Investment	$ 96	$ 82
Post-modification Outstanding Recorded Investment	$ 79	$ 64
Home Equity Loans [Member] | Nonperforming [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	884	1,142
Pre-modification Outstanding Recorded Investment	$ 52	$ 66
Post-modification Outstanding Recorded Investment	$ 49	$ 63
Consumer Direct Loans [Member] | Prior-Year Accruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	136	79
Pre-modification Outstanding Recorded Investment	$ 5	$ 4
Post-modification Outstanding Recorded Investment	$ 3	$ 3
Consumer Direct Loans [Member] | Nonperforming [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	120	171
Pre-modification Outstanding Recorded Investment	$ 2	$ 2
Post-modification Outstanding Recorded Investment	$ 1	$ 1
Consumer Credit Card [Member] | Prior-Year Accruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	598	479
Pre-modification Outstanding Recorded Investment	$ 3	$ 3
Post-modification Outstanding Recorded Investment	$ 1	$ 1
Consumer Credit Card [Member] | Nonperforming [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	225	330
Pre-modification Outstanding Recorded Investment	$ 1	$ 2
Post-modification Outstanding Recorded Investment	$ 1	$ 2
Consumer Indirect Loans [Member] | Prior-Year Accruing [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	753	556
Pre-modification Outstanding Recorded Investment	$ 37	$ 33
Post-modification Outstanding Recorded Investment	$ 23	$ 22
Consumer Indirect Loans [Member] | Nonperforming [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | SecurityLoan	974	1,098
Pre-modification Outstanding Recorded Investment	$ 16	$ 18
Post-modification Outstanding Recorded Investment	$ 14	$ 14

Asset Quality - Changes in Allo

Asset Quality - Changes in Allowance for Loan and Lease Losses by Loan Category (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 897	$ 893
Provision	66	60
Charge-offs	(91)	(76)
Recoveries	24	20
Ending balance	896	897
Provision (credit) for losses on lending-related commitments	(2)	3
Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	883	877
Provision	64	58
Charge-offs	(87)	(72)
Recoveries	23	18
Ending balance	883	881
Continuing Operations [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	743	735
Provision	35	38
Charge-offs	(53)	(39)
Recoveries	12	8
Ending balance	737	742
Continuing Operations [Member] | Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	532	529
Provision	24	35
Charge-offs	(36)	(37)
Recoveries	10	6
Ending balance	530	533
Continuing Operations [Member] | Commercial Real Estate: Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	142	133
Provision	6	4
Charge-offs	(5)	(1)
Recoveries	1	0
Ending balance	144	136
Continuing Operations [Member] | RE Construction [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	33	30
Provision	(1)	2
Charge-offs	(4)	0
Recoveries	0	1
Ending balance	28	33
Continuing Operations [Member] | Commercial Real Estate [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	175	163
Provision	5	6
Charge-offs	(9)	(1)
Recoveries	1	1
Ending balance	172	169
Continuing Operations [Member] | Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	36	43
Provision	6	(3)
Charge-offs	(8)	(1)
Recoveries	1	1
Ending balance	35	40
Continuing Operations [Member] | Real Estate - Residential Mortgage [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	7	7
Provision	1	3
Charge-offs	(1)	(1)
Recoveries	1	0
Ending balance	8	9
Continuing Operations [Member] | Home Equity Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	35	43
Provision	3	(4)
Charge-offs	(4)	(4)
Recoveries	2	3
Ending balance	36	38
Continuing Operations [Member] | Consumer Direct Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	30	28
Provision	12	5
Charge-offs	(10)	(8)
Recoveries	1	2
Ending balance	33	27
Continuing Operations [Member] | Credit Cards [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	48	44
Provision	8	12
Charge-offs	(11)	(12)
Recoveries	2	1
Ending balance	47	45
Continuing Operations [Member] | Consumer Indirect Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	20	20
Provision	5	4
Charge-offs	(8)	(8)
Recoveries	5	4
Ending balance	22	20
Continuing Operations [Member] | Consumer Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	140	142
Provision	29	20
Charge-offs	(34)	(33)
Recoveries	11	10
Ending balance	146	139
Discontinued Operations [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	14	16
Provision	2	2
Charge-offs	(4)	(4)
Recoveries	1	2
Ending balance	$ 13	$ 16

Asset Quality - Breakdown of Al

Asset Quality - Breakdown of Allowance for Loan and Lease Losses and Corresponding Loan Balances (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance, Total ALLL - Including Discontinued Operations	$ 18	$ 21
Collectively Evaluated for Impairment, Allowance, Total ALLL - Including Discontinued Operations	873	871
Purchased Credit Impaired, Allowance, Total ALLL - Including Discontinued Operations	5	5
Loans, Outstanding, Total ALLL - Including Discontinued Operations	91,197	90,625
Individually Evaluated for Impairment, Outstanding, Total ALLL - Including Discontinued Operations	472	470
Collectively Evaluated for Impairment, Outstanding, Total ALLL - Including Discontinued Operations	90,174	89,580
Purchased Credit Impaired, Outstanding, Total ALLL - Including Discontinued Operations	551	575
Continuing Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	16	19
Collectively Evaluated for Impairment, Allowance	862	859
Purchase Credit Impairment, Allowance	5	5
Total loans	90,178	89,552
Individually Evaluated for Impairment, Outstanding	449	447
Collectively Evaluated for Impairment, Outstanding	89,178	88,530
Purchase Credit Impairment, Outstanding	551	575
Continuing Operations [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	2	5
Collectively Evaluated for Impairment, Allowance	732	734
Purchase Credit Impairment, Allowance	3	4
Total loans	66,745	66,310
Individually Evaluated for Impairment, Outstanding	230	228
Collectively Evaluated for Impairment, Outstanding	66,284	65,841
Purchase Credit Impairment, Outstanding	231	241
Continuing Operations [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	14	14
Collectively Evaluated for Impairment, Allowance	130	125
Purchase Credit Impairment, Allowance	2	1
Total loans	23,433	23,242
Individually Evaluated for Impairment, Outstanding	219	219
Collectively Evaluated for Impairment, Outstanding	22,894	22,689
Purchase Credit Impairment, Outstanding	320	334
Discontinued Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	2	2
Collectively Evaluated for Impairment, Allowance	11	12
Purchase Credit Impairment, Allowance	0	0
Total loans	1,019	1,073
Individually Evaluated for Impairment, Outstanding	23	23
Collectively Evaluated for Impairment, Outstanding	996	1,050
Purchase Credit Impairment, Outstanding	0	0
Commercial and Industrial [Member] | Continuing Operations [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	2	5
Collectively Evaluated for Impairment, Allowance	527	526
Purchase Credit Impairment, Allowance	1	1
Total loans	46,474	45,753
Individually Evaluated for Impairment, Outstanding	169	162
Collectively Evaluated for Impairment, Outstanding	46,247	45,530
Purchase Credit Impairment, Outstanding	58	61
Commercial Real Estate: Commercial Mortgage [Member] | Continuing Operations [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	0	0
Collectively Evaluated for Impairment, Allowance	142	139
Purchase Credit Impairment, Allowance	2	3
Total loans	14,344	14,285
Individually Evaluated for Impairment, Outstanding	61	66
Collectively Evaluated for Impairment, Outstanding	14,111	14,041
Purchase Credit Impairment, Outstanding	172	178
Commercial Real Estate: Construction [Member] | Continuing Operations [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	0	0
Collectively Evaluated for Impairment, Allowance	28	33
Purchase Credit Impairment, Allowance	0	0
Total loans	1,420	1,666
Individually Evaluated for Impairment, Outstanding	0	0
Collectively Evaluated for Impairment, Outstanding	1,419	1,664
Purchase Credit Impairment, Outstanding	1	2
Commercial Real Estate Loans [Member] | Continuing Operations [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	0	0
Collectively Evaluated for Impairment, Allowance	170	172
Purchase Credit Impairment, Allowance	2	3
Total loans	15,764	15,951
Individually Evaluated for Impairment, Outstanding	61	66
Collectively Evaluated for Impairment, Outstanding	15,530	15,705
Purchase Credit Impairment, Outstanding	173	180
Commercial Lease Financing [Member] | Continuing Operations [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	0	0
Collectively Evaluated for Impairment, Allowance	35	36
Purchase Credit Impairment, Allowance	0	0
Total loans	4,507	4,606
Individually Evaluated for Impairment, Outstanding	0	0
Collectively Evaluated for Impairment, Outstanding	4,507	4,606
Purchase Credit Impairment, Outstanding	0	0
Real Estate - Residential Mortgage [Member] | Continuing Operations [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	3	3
Collectively Evaluated for Impairment, Allowance	4	4
Purchase Credit Impairment, Allowance	1	0
Total loans	5,615	5,513
Individually Evaluated for Impairment, Outstanding	47	49
Collectively Evaluated for Impairment, Outstanding	5,267	5,150
Purchase Credit Impairment, Outstanding	301	314
Home Equity Loans [Member] | Continuing Operations [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	8	8
Collectively Evaluated for Impairment, Allowance	27	26
Purchase Credit Impairment, Allowance	1	1
Total loans	10,846	11,142
Individually Evaluated for Impairment, Outstanding	128	127
Collectively Evaluated for Impairment, Outstanding	10,702	10,998
Purchase Credit Impairment, Outstanding	16	17
Consumer Direct Loans [Member] | Continuing Operations [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	0	0
Collectively Evaluated for Impairment, Allowance	33	30
Purchase Credit Impairment, Allowance	0	0
Total loans	2,165	1,809
Individually Evaluated for Impairment, Outstanding	4	4
Collectively Evaluated for Impairment, Outstanding	2,158	1,802
Purchase Credit Impairment, Outstanding	3	3
Consumer Credit Card Financing Receivable [Member] | Continuing Operations [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	0	0
Collectively Evaluated for Impairment, Allowance	47	48
Purchase Credit Impairment, Allowance	0	0
Total loans	1,086	1,144
Individually Evaluated for Impairment, Outstanding	3	3
Collectively Evaluated for Impairment, Outstanding	1,083	1,141
Purchase Credit Impairment, Outstanding	0	0
Consumer Indirect Loans [Member] | Continuing Operations [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually Evaluated for Impairment, Allowance	3	3
Collectively Evaluated for Impairment, Allowance	19	17
Purchase Credit Impairment, Allowance	0	0
Total loans	3,721	3,634
Individually Evaluated for Impairment, Outstanding	37	36
Collectively Evaluated for Impairment, Outstanding	3,684	3,598
Purchase Credit Impairment, Outstanding	0	0
Education Lending [Member] | Discontinued Operations [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans at fair value	$ 2	$ 2

Asset Quality - Changes in Liab

Asset Quality - Changes in Liability for Credit Losses on Lending Related Commitments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	$ 64	$ 57
Provision (credit) for losses on lending-related commitments	(2)	3
Balance at end of period	$ 62	$ 60

Asset Quality - Changes in Outs

Asset Quality - Changes in Outstanding Unpaid Principal Balance, Carrying Amount, and Accretable Yield for PCI Loans (Details) - PCI Loans [Member] - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accretable Yield
Balance at beginning of period	$ 117	$ 131
Accretion	(10)	(42)
Net reclassifications from nonaccretable to accretable	13	50
Payments received, net	(2)	(21)
Loans charged off		(1)
Balance at end of period	118	117
Carrying Amount	547	571	$ 738
Outstanding Unpaid Principal Balance	$ 578	$ 607	$ 803

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	$ 979,000,000	$ 849,000,000
Securities available for sale	20,854,000,000	19,428,000,000
Loans, net of unearned income	90,178,000,000	89,552,000,000
Loans held for sale		0
Derivative assets, netting adjustments	(324,000,000)	(333,000,000)
Total derivative assets	526,000,000	531,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, netting adjustments	(336,000,000)	(337,000,000)
US Treasury and Government [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	270,000,000	147,000,000
US States and Political Subdivisions Debt Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	6,000,000	7,000,000
Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	25,000,000	20,000,000
Residential Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	2,143,000,000	2,105,000,000
Other Mortgage-Backed Securities [Member] | Commercial Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	4,330,000,000	3,187,000,000
Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	946,000,000	824,000,000
Commercial loans	33,000,000	25,000,000
Total trading account assets	979,000,000	849,000,000
Securities available for sale	20,854,000,000	19,428,000,000
Total other investments	103,000,000	115,000,000
Loans, net of unearned income	3,000,000	3,000,000
Loans held for sale	71,000,000	54,000,000
Derivative assets, gross	850,000,000	864,000,000
Derivative assets, netting adjustments	(324,000,000)	(333,000,000)
Total derivative assets	526,000,000	531,000,000
Accrued income and other assets	0	0
Total assets at fair value	22,536,000,000	20,980,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Accrued expense and other liabilities	0	0
Total liabilities on a recurring basis at fair value	882,000,000	930,000,000
Recurring [Member] | US Treasury and Government [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	746,000,000	578,000,000
Securities available for sale	270,000,000	147,000,000
Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	46,000,000	60,000,000
Securities available for sale	6,000,000	7,000,000
Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	69,000,000	22,000,000
Securities available for sale	25,000,000	20,000,000
Recurring [Member] | Commercial Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	4,330,000,000	3,187,000,000
Recurring [Member] | Principal Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	1,000,000	1,000,000
Recurring [Member] | Principal Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	84,000,000	97,000,000
Recurring [Member] | Equity Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	9,000,000	8,000,000
Recurring [Member] | Equity Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	19,000,000	18,000,000
Recurring [Member] | Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	85,000,000	164,000,000
Recurring [Member] | Other Mortgage-Backed Securities [Member] | Residential Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	2,143,000,000	2,105,000,000
Recurring [Member] | Short [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Short positions	679,000,000	544,000,000
Recurring [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	539,000,000	723,000,000
Derivative liabilities, netting adjustments	(336,000,000)	(337,000,000)
Total derivative liabilities	203,000,000	386,000,000
Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	529,000,000	415,000,000
Recurring [Member] | Interest Rate [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	237,000,000	297,000,000
Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	76,000,000	106,000,000
Recurring [Member] | Foreign Exchange [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	68,000,000	95,000,000
Recurring [Member] | Commodity [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	233,000,000	333,000,000
Recurring [Member] | Commodity [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	223,000,000	323,000,000
Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	1,000,000	1,000,000
Recurring [Member] | Credit [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	3,000,000	1,000,000
Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	11,000,000	9,000,000
Recurring [Member] | Other [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	8,000,000	7,000,000
Level 1 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	1,000,000	0
Commercial loans	0	0
Total trading account assets	1,000,000	0
Securities available for sale	0	0
Total other investments	0	0
Loans, net of unearned income	0	0
Loans held for sale	0	0
Derivative assets, gross	45,000,000	70,000,000
Derivative assets, netting adjustments	0	0
Total derivative assets	45,000,000	70,000,000
Accrued income and other assets	0	0
Total assets at fair value	46,000,000	70,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Accrued expense and other liabilities	0	0
Total liabilities on a recurring basis at fair value	46,000,000	72,000,000
Level 1 [Member] | Recurring [Member] | US Treasury and Government [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	0	0
Securities available for sale	0	0
Level 1 [Member] | Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	0	0
Securities available for sale	0	0
Level 1 [Member] | Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	1,000,000	0
Securities available for sale	0	0
Level 1 [Member] | Recurring [Member] | Commercial Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	0	0
Level 1 [Member] | Recurring [Member] | Principal Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	0	0
Level 1 [Member] | Recurring [Member] | Principal Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	0	0
Level 1 [Member] | Recurring [Member] | Equity Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments		0
Level 1 [Member] | Recurring [Member] | Equity Investments Direct, NAV [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	0
Level 1 [Member] | Recurring [Member] | Equity Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	0	0
Level 1 [Member] | Recurring [Member] | Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	0	0
Level 1 [Member] | Recurring [Member] | Other Mortgage-Backed Securities [Member] | Residential Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	0	0
Level 1 [Member] | Recurring [Member] | Short [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Short positions	10,000,000	14,000,000
Level 1 [Member] | Recurring [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	36,000,000	58,000,000
Derivative liabilities, netting adjustments	0	0
Total derivative liabilities	36,000,000	58,000,000
Level 1 [Member] | Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	0	0
Level 1 [Member] | Recurring [Member] | Interest Rate [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	0
Level 1 [Member] | Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	45,000,000	70,000,000
Level 1 [Member] | Recurring [Member] | Foreign Exchange [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	36,000,000	58,000,000
Level 1 [Member] | Recurring [Member] | Commodity [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	0	0
Level 1 [Member] | Recurring [Member] | Commodity [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	0
Level 1 [Member] | Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	0	0
Level 1 [Member] | Recurring [Member] | Credit [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	0
Level 1 [Member] | Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	0	0
Level 1 [Member] | Recurring [Member] | Other [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	0
Level 2 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	945,000,000	824,000,000
Commercial loans	33,000,000	25,000,000
Total trading account assets	978,000,000	849,000,000
Securities available for sale	20,829,000,000	19,408,000,000
Total other investments	1,000,000	1,000,000
Loans, net of unearned income	0	0
Loans held for sale	70,000,000	54,000,000
Derivative assets, gross	798,000,000	786,000,000
Derivative assets, netting adjustments	0	0
Total derivative assets	798,000,000	786,000,000
Accrued income and other assets	0	0
Total assets at fair value	22,676,000,000	21,098,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Accrued expense and other liabilities	0	0
Total liabilities on a recurring basis at fair value	1,171,000,000	1,195,000,000
Level 2 [Member] | Recurring [Member] | US Treasury and Government [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	746,000,000	578,000,000
Securities available for sale	270,000,000	147,000,000
Level 2 [Member] | Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	46,000,000	60,000,000
Securities available for sale	6,000,000	7,000,000
Level 2 [Member] | Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	68,000,000	22,000,000
Securities available for sale	0	0
Level 2 [Member] | Recurring [Member] | Commercial Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	4,330,000,000	3,187,000,000
Level 2 [Member] | Recurring [Member] | Principal Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	0	0
Level 2 [Member] | Recurring [Member] | Principal Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	0	0
Level 2 [Member] | Recurring [Member] | Equity Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	1,000,000	1,000,000
Level 2 [Member] | Recurring [Member] | Equity Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	1,000,000	1,000,000
Level 2 [Member] | Recurring [Member] | Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	85,000,000	164,000,000
Level 2 [Member] | Recurring [Member] | Other Mortgage-Backed Securities [Member] | Residential Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	2,143,000,000	2,105,000,000
Level 2 [Member] | Recurring [Member] | Short [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Short positions	669,000,000	530,000,000
Level 2 [Member] | Recurring [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	502,000,000	665,000,000
Derivative liabilities, netting adjustments	0	0
Total derivative liabilities	502,000,000	665,000,000
Level 2 [Member] | Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	526,000,000	410,000,000
Level 2 [Member] | Recurring [Member] | Interest Rate [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	237,000,000	297,000,000
Level 2 [Member] | Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	31,000,000	36,000,000
Level 2 [Member] | Recurring [Member] | Foreign Exchange [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	32,000,000	37,000,000
Level 2 [Member] | Recurring [Member] | Commodity [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	233,000,000	333,000,000
Level 2 [Member] | Recurring [Member] | Commodity [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	223,000,000	323,000,000
Level 2 [Member] | Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	1,000,000	1,000,000
Level 2 [Member] | Recurring [Member] | Credit [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	2,000,000	1,000,000
Level 2 [Member] | Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	7,000,000	6,000,000
Level 2 [Member] | Recurring [Member] | Other [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	8,000,000	7,000,000
Level 3 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	0	0
Commercial loans	0	0
Total trading account assets	0	0
Securities available for sale	25,000,000	20,000,000
Total other investments	9,000,000	8,000,000
Loans, net of unearned income	3,000,000	3,000,000
Loans held for sale	1,000,000	0
Derivative assets, gross	7,000,000	8,000,000
Derivative assets, netting adjustments	0	0
Total derivative assets	7,000,000	8,000,000
Accrued income and other assets	0	0
Total assets at fair value	45,000,000	39,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Accrued expense and other liabilities	0	0
Total liabilities on a recurring basis at fair value	1,000,000	0
Level 3 [Member] | Recurring [Member] | US Treasury and Government [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	0	0
Securities available for sale	0	0
Level 3 [Member] | Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	0	0
Securities available for sale	0	0
Level 3 [Member] | Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	0	0
Securities available for sale	25,000,000	20,000,000
Level 3 [Member] | Recurring [Member] | Commercial Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	0	0
Level 3 [Member] | Recurring [Member] | Principal Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	1,000,000	1,000,000
Level 3 [Member] | Recurring [Member] | Principal Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	1,000,000	1,000,000
Level 3 [Member] | Recurring [Member] | Equity Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	8,000,000	7,000,000
Level 3 [Member] | Recurring [Member] | Equity Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	8,000,000	7,000,000
Level 3 [Member] | Recurring [Member] | Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	0	0
Level 3 [Member] | Recurring [Member] | Other Mortgage-Backed Securities [Member] | Residential Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	0	0
Level 3 [Member] | Recurring [Member] | Short [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Short positions	0	0
Level 3 [Member] | Recurring [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	1,000,000	0
Derivative liabilities, netting adjustments	0	0
Total derivative liabilities	1,000,000	0
Level 3 [Member] | Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	3,000,000	5,000,000
Level 3 [Member] | Recurring [Member] | Interest Rate [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	0
Level 3 [Member] | Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	0	0
Level 3 [Member] | Recurring [Member] | Foreign Exchange [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	0
Level 3 [Member] | Recurring [Member] | Commodity [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	0	0
Level 3 [Member] | Recurring [Member] | Commodity [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	0
Level 3 [Member] | Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	0	0
Level 3 [Member] | Recurring [Member] | Credit [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	1,000,000	0
Level 3 [Member] | Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	4,000,000	3,000,000
Level 3 [Member] | Recurring [Member] | Other [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	0
Measured at NAV [Member] | Recurring [Member] | Principal Investments Indirect [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	83,000,000	96,000,000
Measured at NAV [Member] | Recurring [Member] | Equity Investments Direct, NAV [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	1,000,000	1,000,000
Measured at NAV [Member] | Recurring [Member] | Equity Investments Indirect, NAV [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	9,000,000	9,000,000
Collateralized Mortgage Obligations [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	14,080,000,000	13,962,000,000
Collateralized Mortgage Obligations [Member] | Level 1 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	0	0
Collateralized Mortgage Obligations [Member] | Level 2 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	14,080,000,000	13,962,000,000
Collateralized Mortgage Obligations [Member] | Level 3 [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	$ 0	$ 0

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other equity investments	$ 127,000,000	$ 107,000,000
Impairment loss	0
Loans, net of allowance	89,295,000,000	88,669,000,000
Discontinued Operations [Member] | Education Lending [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	1,000,000,000	1,100,000,000
Loans at fair value	2,000,000	2,000,000
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	646,000,000	666,000,000
Loans, net of allowance	87,378,000,000	86,224,000,000
Loans at fair value	3,000,000	3,000,000
Fair Value [Member] | Discontinued Operations [Member] | Education Lending [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	800,000,000	900,000,000
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	646,000,000	666,000,000
Loans, net of allowance	89,292,000,000	88,666,000,000
Loans at fair value	3,000,000	3,000,000
Carrying Amount [Member] | Discontinued Operations [Member] | Education Lending [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	1,000,000,000	1,100,000,000
Level 3 [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	552,000,000	559,000,000
Loans, net of allowance	87,378,000,000	86,224,000,000
Loans at fair value	3,000,000	3,000,000
Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	103,000,000	115,000,000
Liabilities measured at fair value on non recurring basis	882,000,000	930,000,000
Recurring [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	9,000,000	8,000,000
Liabilities measured at fair value on non recurring basis	1,000,000	0
Nonrecurring [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Liabilities measured at fair value on non recurring basis	0	0
Principal Investments Direct [Member] | Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	1,000,000	1,000,000
Principal Investments Direct [Member] | Recurring [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	$ 1,000,000	$ 1,000,000

Fair Value Measurements - Fai_2

Fair Value Measurements - Fair Value of Direct and Indirect Investments, Related Unfunded Commitments and Financial Support Provided (Details) - Principal Investments [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 84
Unfunded Commitments	25
Funded Commitments	1	$ 0
Funded Other	1	0
Direct Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	1
Unfunded Commitments	0
Funded Commitments	0	0
Funded Other	1	0
Indirect Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	83
Unfunded Commitments	25
Funded Commitments	1	0
Funded Other	$ 0	$ 0

Fair Value Measurements - Chang

Fair Value Measurements - Change in Fair Values of Level 3 Financial Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Securities Available for Sale [Member] | Other Securities [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	$ 20	$ 20
Gains (Losses) Included in Other Comprehensive Income	5	0
Gains (Losses) Included in Earnings	0	0
Purchases	0	0
Sales	0	0
Settlements	0	0
Transfers Other	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
End of Period Balance	25	20
Unrealized Gains (Losses) Included in Earnings	0	0
Other Investments [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	7	3
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	0	0
Purchases	0	0
Sales	0	0
Settlements	0	0
Transfers Other	0	0
Transfers into Level 3	1	4
Transfers out of Level 3	0	0
End of Period Balance		7
Unrealized Gains (Losses) Included in Earnings	0	0
Other Investments [Member] | Principal Investments Direct [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	1	13
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	0	(1)
Purchases	1	0
Sales	(1)	0
Settlements	0	0
Transfers Other	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
End of Period Balance		12
Unrealized Gains (Losses) Included in Earnings	0	(1)
Interest Rate [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	5	9
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	1	(1)
Purchases	0	0
Sales	0	0
Settlements	0	0
Transfers Other	0	0
Transfers into Level 3	1	1
Transfers out of Level 3	(4)	(5)
End of Period Balance		4
Unrealized Gains (Losses) Included in Earnings	0	0
Credit [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	0	1
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	0	(5)
Purchases	(1)	0
Sales	0	0
Settlements	0	4
Transfers Other	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
End of Period Balance	(1)	0
Unrealized Gains (Losses) Included in Earnings	0	0
Other [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	3	3
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	0	0
Purchases	0	0
Sales	0	0
Settlements	0	0
Transfers Other	1	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
End of Period Balance		3
Unrealized Gains (Losses) Included in Earnings	0	0
Loans Held For Sale Fair Value [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	0	1
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	0	0
Purchases	0	0
Sales	0	0
Settlements	0	0
Transfers Other	1	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
End of Period Balance	1	1
Unrealized Gains (Losses) Included in Earnings	0	0
Loans Held For Investment Fair Value [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	3	2
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	0	0
Purchases	0	0
Sales	0	0
Settlements	0	0
Transfers Other	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
End of Period Balance		2
Unrealized Gains (Losses) Included in Earnings	$ 0	$ 0

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring [Member] - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
ASSETS MEASURED ON A NONRECURRING BASIS
Impaired loans and leases	$ 17	$ 42
Accrued income and other assets	2	16
Total assets at fair value	19	58
Level 1 [Member]
ASSETS MEASURED ON A NONRECURRING BASIS
Impaired loans and leases	0	0
Accrued income and other assets	0	0
Total assets at fair value	0	0
Level 2 [Member]
ASSETS MEASURED ON A NONRECURRING BASIS
Impaired loans and leases	0	0
Accrued income and other assets	0	0
Total assets at fair value	0	0
Level 3 [Member]
ASSETS MEASURED ON A NONRECURRING BASIS
Impaired loans and leases	17	42
Accrued income and other assets	2	16
Total assets at fair value	$ 19	$ 58

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative Information about Level 3 Fair Value Measurements (Details)	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	$ 20,854,000,000	$ 19,428,000,000
Loans held for sale		0
Derivative assets	526,000,000	531,000,000
Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	20,854,000,000	19,428,000,000
Other investments	103,000,000	115,000,000
Loans held for sale	71,000,000	54,000,000
Derivative assets	526,000,000	531,000,000
Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	17,000,000	42,000,000
Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	25,000,000	20,000,000
Other investments	9,000,000	8,000,000
Loans held for sale	1,000,000	0
Derivative assets	7,000,000	8,000,000
Level 3 [Member] | Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	17,000,000	42,000,000
Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments	$ 8,000,000
Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments, measurement input	0.1483
Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments, measurement input	0.1759
Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments, measurement input	0.1572
Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Marketability [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments, measurement input	0.3000
Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Price Volatility [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments, measurement input	0.4900
Valuation, Market Comparable Pricing [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale	$ 1,000,000
Loans held for investment	$ 3,000,000
Valuation, Market Comparable Pricing [Member] | Measurement Input, Comparability Adjustment [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale, measurement input	0.8050
Loans held for investment, measurement input	0.7757
Valuation, Market Comparable Pricing [Member] | Measurement Input, Comparability Adjustment [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale, measurement input	0.9700
Loans held for investment, measurement input	0.9475
Valuation, Market Comparable Pricing [Member] | Measurement Input, Comparability Adjustment [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale, measurement input	0.8674
Loans held for investment, measurement input	0.8950
Valuation, Fair Value Of Underlying Collateral [Member] | Level 3 [Member] | Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	$ 17,000,000	$ 42,000,000
Valuation, Fair Value Of Underlying Collateral [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Nonrecurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans, measurement input	0.2000	0.2000
Valuation, Fair Value Of Underlying Collateral [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Nonrecurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans, measurement input	0.5000	0.4000
Valuation, Fair Value Of Underlying Collateral [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Nonrecurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans, measurement input	0.2300	0.2100
Valuation, Appraised Value [Member] | Level 3 [Member] | Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
OREO and other Level 3 assets	$ 2,000,000
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets	$ 3,000,000
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Default Rate [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	0.0002
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Default Rate [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	1
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Default Rate [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	0.021
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Internal Risk Rating [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	1
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Internal Risk Rating [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	19
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Internal Risk Rating [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	8.80
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loss Given Default [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	0
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loss Given Default [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	1
Interest Rate [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loss Given Default [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	0.49
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities	$ (1,000,000)
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Default Rate [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	0.0002
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Default Rate [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	1
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Default Rate [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	0.0257
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Internal Risk Rating [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	1
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Internal Risk Rating [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	19
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Internal Risk Rating [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	9.32
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loss Given Default [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	0
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loss Given Default [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	1
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loss Given Default [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative liabilities, measurement input	0.50
Other [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets	$ 4,000,000
Other [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loan Closing Rates [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	0.3593
Other [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loan Closing Rates [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	0.9969
Other [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Loan Closing Rates [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets, measurement input	0.7610
Other Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	$ 25,000,000	$ 20,000,000
Other Securities [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	25,000,000	20,000,000
Other Securities [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	25,000,000	20,000,000
Other Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	$ 25,000,000
Other Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale, measurement input	0.1434
Other Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale, measurement input	0.1501
Other Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Rate [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale, measurement input	0.1462
Other Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Discount Marketability [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale, measurement input	0.3000
Other Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Price Volatility [Member] | Level 3 [Member] | Recurring [Member] | Minimum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale, measurement input	0.3700
Other Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Price Volatility [Member] | Level 3 [Member] | Recurring [Member] | Maximum [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale, measurement input	0.4200
Other Securities [Member] | Valuation Technique, Discounted Cash Flow [Member] | Measurement Input, Price Volatility [Member] | Level 3 [Member] | Recurring [Member] | Weighted Average [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale, measurement input	0.3993
Principal Investments Direct [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments	$ 1,000,000	1,000,000
Principal Investments Direct [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments	$ 1,000,000	$ 1,000,000

Fair Value Measurements - Fai_3

Fair Value Measurements - Fair Value Disclosures of Financial Instruments (Details) - USD ($)		Mar. 31, 2019	Dec. 31, 2018
ASSETS
Trading account assets		$ 979,000,000	$ 849,000,000
Loans held for sale			0
Derivative assets		526,000,000	531,000,000
Securities available for sale		20,854,000,000	19,428,000,000
Amortized Cost		11,234,000,000	11,519,000,000
Held-to-maturity securities		10,997,000,000	11,122,000,000
Loans, net of allowance		89,295,000,000	88,669,000,000
Loans held for sale	[1]	894,000,000	1,227,000,000
LIABILITIES
Long-term debt		14,168,000,000	13,732,000,000
Carrying Amount [Member]
ASSETS
Trading account assets		979,000,000	849,000,000
Other investments		646,000,000	666,000,000
Loans, net of allowance		3,000,000	3,000,000
Loans held for sale		71,000,000	54,000,000
Securities available for sale		20,854,000,000	19,428,000,000
Amortized Cost		11,234,000,000	11,519,000,000
Loans, net of allowance		89,292,000,000	88,666,000,000
Loans held for sale		823,000,000	1,173,000,000
Cash and short-term investments		3,122,000,000	3,240,000,000
LIABILITIES
Time deposits		13,969,000,000	13,245,000,000
Short-term borrowings		945,000,000	863,000,000
Long-term debt		14,168,000,000	13,732,000,000
Deposits with no stated maturity		94,206,000,000	94,064,000,000
Fair Value [Member]
ASSETS
Trading account assets		979,000,000	849,000,000
Other investments		646,000,000	666,000,000
Loans, net of allowance		3,000,000	3,000,000
Loans held for sale		71,000,000	54,000,000
Securities available for sale		20,854,000,000	19,428,000,000
Held-to-maturity securities		10,997,000,000	11,122,000,000
Loans, net of allowance		87,378,000,000	86,224,000,000
Loans held for sale		823,000,000	1,173,000,000
Cash and short-term investments		3,122,000,000	3,240,000,000
LIABILITIES
Time deposits		14,076,000,000	13,331,000,000
Short-term borrowings		945,000,000	863,000,000
Long-term debt		14,457,000,000	13,787,000,000
Deposits with no stated maturity		94,206,000,000	94,064,000,000
Fair Value [Member] | Level 1 [Member]
ASSETS
Trading account assets		1,000,000	0
Other investments		0	0
Loans, net of allowance		0	0
Loans held for sale		0	0
Securities available for sale		0	0
Held-to-maturity securities		0	0
Loans, net of allowance		0	0
Loans held for sale		0	0
Cash and short-term investments		3,122,000,000	3,240,000,000
LIABILITIES
Time deposits		0	0
Short-term borrowings		10,000,000	14,000,000
Long-term debt		13,235,000,000	12,576,000,000
Deposits with no stated maturity		0	0
Fair Value [Member] | Level 2 [Member]
ASSETS
Trading account assets		978,000,000	849,000,000
Other investments		1,000,000	1,000,000
Loans, net of allowance		0	0
Loans held for sale		70,000,000	54,000,000
Securities available for sale		20,829,000,000	19,408,000,000
Held-to-maturity securities		10,997,000,000	11,122,000,000
Loans, net of allowance		0	0
Loans held for sale		0	0
Cash and short-term investments		0	0
LIABILITIES
Time deposits		14,076,000,000	13,331,000,000
Short-term borrowings		935,000,000	849,000,000
Long-term debt		1,222,000,000	1,211,000,000
Deposits with no stated maturity		94,206,000,000	94,064,000,000
Fair Value [Member] | Level 3 [Member]
ASSETS
Trading account assets		0	0
Other investments		552,000,000	559,000,000
Loans, net of allowance		3,000,000	3,000,000
Loans held for sale		1,000,000	0
Securities available for sale		25,000,000	20,000,000
Held-to-maturity securities		0	0
Loans, net of allowance		87,378,000,000	86,224,000,000
Loans held for sale		823,000,000	1,173,000,000
Cash and short-term investments		0	0
LIABILITIES
Time deposits		0	0
Short-term borrowings		0	0
Long-term debt		0	0
Deposits with no stated maturity		0	0
Fair Value [Member] | Measured at NAV [Member]
ASSETS
Other investments		93,000,000	106,000,000
Derivatives Designated as Hedging Instruments [Member] | Carrying Amount [Member]
ASSETS
Derivative assets		37,000,000	69,000,000
LIABILITIES
Derivative liabilities		5,000,000	(9,000,000)
Derivatives Designated as Hedging Instruments [Member] | Fair Value [Member]
ASSETS
Derivative assets		37,000,000	69,000,000
Derivative assets, Netting Adjustment		13,000,000	17,000,000
LIABILITIES
Derivative liabilities		5,000,000	(9,000,000)
Derivative liabilities, Netting Adjustment		(5,000,000)	1,000,000
Derivatives Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 1 [Member]
ASSETS
Derivative assets		0	2,000,000
LIABILITIES
Derivative liabilities		0	0
Derivatives Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 2 [Member]
ASSETS
Derivative assets		24,000,000	50,000,000
LIABILITIES
Derivative liabilities		10,000,000	(10,000,000)
Derivatives Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 3 [Member]
ASSETS
Derivative assets		0	0
LIABILITIES
Derivative liabilities		0	0
Derivatives Not Designated as Hedging Instruments [Member] | Carrying Amount [Member]
ASSETS
Derivative assets		489,000,000	462,000,000
LIABILITIES
Derivative liabilities		198,000,000	395,000,000
Derivatives Not Designated as Hedging Instruments [Member] | Fair Value [Member]
ASSETS
Derivative assets		489,000,000	462,000,000
Derivative assets, Netting Adjustment		(337,000,000)	(350,000,000)
LIABILITIES
Derivative liabilities		198,000,000	395,000,000
Derivative liabilities, Netting Adjustment		(331,000,000)	(338,000,000)
Derivatives Not Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 1 [Member]
ASSETS
Derivative assets		45,000,000	68,000,000
LIABILITIES
Derivative liabilities		36,000,000	58,000,000
Derivatives Not Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 2 [Member]
ASSETS
Derivative assets		774,000,000	736,000,000
LIABILITIES
Derivative liabilities		492,000,000	675,000,000
Derivatives Not Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 3 [Member]
ASSETS
Derivative assets		7,000,000	8,000,000
LIABILITIES
Derivative liabilities		$ 1,000,000	$ 0
[1]	Total loans held for sale include real estate — residential mortgage loans held for sale at fair value of $71 million at March 31, 2019 , and $54 million at December 31, 2018

Securities - Details of Securit

Securities - Details of Securities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
SECURITIES AVAILABLE FOR SALE
Amortized Cost	$ 21,102	$ 19,917
Gross Unrealized Gains	126	55
Gross Unrealized Losses	374	544
Fair Value	20,854	19,428
HELD-TO-MATURITY SECURITIES
Amortized Cost	11,234	11,519
Gross Unrealized Gains	13	4
Gross Unrealized Losses	250	401
Fair Value	10,997	11,122
US Treasury and Government [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost	272	150
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2	3
Fair Value	270	147
US States and Political Subdivisions Debt Securities [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost	6	7
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	6	7
Collateralized Mortgage Obligations [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost	14,277	14,315
Gross Unrealized Gains	45	20
Gross Unrealized Losses	242	373
Fair Value	14,080	13,962
HELD-TO-MATURITY SECURITIES
Amortized Cost	6,762	7,021
Gross Unrealized Gains	6	2
Gross Unrealized Losses	175	254
Fair Value	6,593	6,769
Residential Mortgage Backed Securities [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost	2,138	2,128
Gross Unrealized Gains	27	13
Gross Unrealized Losses	22	36
Fair Value	2,143	2,105
HELD-TO-MATURITY SECURITIES
Amortized Cost	475	490
Gross Unrealized Gains	0	0
Gross Unrealized Losses	6	14
Fair Value	469	476
Other Securities [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost	17	17
Gross Unrealized Gains	8	3
Gross Unrealized Losses	0	0
Fair Value	25	20
HELD-TO-MATURITY SECURITIES
Amortized Cost	15	12
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	15	12
Other Mortgage-Backed Securities [Member] | Commercial Mortgage Backed Securities [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost	4,392	3,300
Gross Unrealized Gains	46	19
Gross Unrealized Losses	108	132
Fair Value	4,330	3,187
HELD-TO-MATURITY SECURITIES
Amortized Cost	3,982	3,996
Gross Unrealized Gains	7	2
Gross Unrealized Losses	69	133
Fair Value	$ 3,920	$ 3,865

Securities - Available for Sale

Securities - Available for Sale Securities (Unrealized Loss Position) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Held-to-maturity securities:
Gross unrealized losses, less than 12 months	$ 1
Temporarily impaired securities, fair value, less than 12 months	726	$ 647
Temporarily impaired securities, gross unrealized losses, less than 12 months	1	2
Temporarily impaired securities, fair value, 12 months or longer	21,803	24,158
Temporarily impaired securities, gross unrealized losses, 12 months or longer	623	943
Temporarily impaired securities, fair value	22,529	24,805
Temporarily impaired securities, gross unrealized losses	624	945
US Treasury and Government [Member]
Securities available for sale:
Fair value, less than 12 months	0	0
Gross unrealized losses, less than 12 months	0	0
Fair value, 12 months or longer	148	147
Gross unrealized losses, 12 months or longer	2	3
Fair value	148	147
Gross unrealized losses	2	3
Collateralized Mortgage Obligations [Member]
Securities available for sale:
Fair value, less than 12 months	347	570
Gross unrealized losses, less than 12 months	1	2
Fair value, 12 months or longer	9,807	10,945
Gross unrealized losses, 12 months or longer	241	371
Fair value	10,154	11,515
Gross unrealized losses	242	373
Held-to-maturity securities:
Fair value, less than 12 months	77	0
Gross unrealized losses, less than 12 months		0
Fair value, 12 months or longer	6,092	6,416
Gross unrealized losses, 12 months or longer	175	254
Fair value	6,169	6,416
Gross unrealized losses	175	254
Commercial Mortgage Backed Securities [Member]
Securities available for sale:
Fair value, less than 12 months	0	0
Gross unrealized losses, less than 12 months	0	0
Fair value, 12 months or longer	1,742	1,729
Gross unrealized losses, 12 months or longer	108	132
Fair value	1,742	1,729
Gross unrealized losses		132
Held-to-maturity securities:
Fair value, less than 12 months	203	73
Gross unrealized losses, less than 12 months		1
Fair value, 12 months or longer	2,593	3,359
Gross unrealized losses, 12 months or longer	69	133
Fair value	2,796	3,432
Gross unrealized losses	69	133
Other Securities [Member]
Held-to-maturity securities:
Fair value, less than 12 months	3
Fair value, 12 months or longer	0
Gross unrealized losses, 12 months or longer	0
Fair value	3
Gross unrealized losses	0
Other Mortgage-Backed Securities [Member] | Residential Mortgage Backed Securities [Member]
Securities available for sale:
Fair value, less than 12 months	1	4
Gross unrealized losses, less than 12 months	1	1
Fair value, 12 months or longer	1,047	1,087
Gross unrealized losses, 12 months or longer	22	36
Fair value	1,048	1,091
Gross unrealized losses	22	36
Held-to-maturity securities:
Fair value, less than 12 months	95	0
Gross unrealized losses, less than 12 months		0
Fair value, 12 months or longer	374	475
Gross unrealized losses, 12 months or longer	6	14
Fair value	469	475
Gross unrealized losses	6	$ 14
Other Mortgage-Backed Securities [Member] | Commercial Mortgage Backed Securities [Member]
Securities available for sale:
Gross unrealized losses	$ 108

Securities - Additional Informa

Securities - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019USD ($)loanposition	Dec. 31, 2018USD ($)
Debt Securities, Available-for-sale [Line Items]
Impairment recognized in earnings	$ 0
Loans pledged as collateral	$ 9,000,000,000
Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale [Line Items]
Number of fixed rate collateralized mortgage obligations | loan	403
Weighted average maturity collateralized mortgage life	4 years 2 months 15 days
Residential Mortgage Backed Securities [Member] | Agency residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses	$ 22,000,000	$ 36,000,000
Securities in unrealized loss positions, number of positions | position	240
Weighted average maturity mortgage backed securities	3 years 11 months 8 days
Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses		$ 132,000,000
Commercial Mortgage Backed Securities [Member] | Agency residential mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses	$ 108,000,000
Securities in unrealized loss positions, number of positions | position	14
Weighted average maturity mortgage backed securities	4 years 21 days

Securities - Securities by Matu

Securities - Securities by Maturity (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Amortized Cost of Securities Available for sale, Due in one year or less	$ 271
Amortized Cost of Securities Available for sale, Due after one through five years	15,750
Amortized Cost of Securities Available for sale, Due after five through ten years	5,071
Amortized Cost of Securities Available for sale, Due after ten years	10
Amortized Cost	21,102	$ 19,917
Fair Value of Securities Available for sale, Due in one year or less	276
Fair Value of Securities Available for sale, Due after one through five years	15,510
Fair Value of Securities Available for sale, Due after five through ten years	5,057
Fair Value of Securities Available for sale, Due after ten years	11
Total Fair Value of Securities Available For Sale	20,854	19,428
Amortized Cost of Held-to-Maturity Securities, Due in one year or less	52
Amortized Cost of Held-to-Maturity Securities, Due after one through five years	6,791
Amortized Cost of Held-to-Maturity Securities, Due after five through ten years	4,391
Amortized Cost of Held-to-Maturity Securities, Due after ten years	0
Amortized Cost	11,234	11,519
Fair Value of Held-to-Maturity Securities, Due in one year or less	52
Fair Value of Held-to-Maturity Securities, Due after one through five years	6,647
Fair Value of Held-to-Maturity Securities, Due after five through ten years	4,298
Fair Value of Held-to-Maturity Securities, Due after ten years	0
Total Fair Value of Held-to-Maturity Securities	$ 10,997	$ 11,122

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)derivativerating	Dec. 31, 2018USD ($)
Credit Derivatives [Line Items]
Derivative assets after effects of bilateral collateral and master netting agreements	$ 37
Derivative liabilities after effects of bilateral collateral and master netting agreements	5
Derivative assets not designated as hedging instruments after effects of bilateral collateral and master netting agreements, and a reserve for potential future losses	489
Derivative liabilities not designated as hedging instruments after effects of bilateral collateral and master netting agreements, and a reserve for potential future losses	198
Reclassify of after-tax net losses on derivative instruments from AOCI	$ 22
Length of time hedge in cash flow hedge	12 months
Reclassification of net losses related to terminated cash flow hedges from AOCI to income	$ 17
Maximum length of time over which forecasted transactions are hedged, years	10 years
Other Comprehensive income unrealized gain on derivatives arising during period net of tax	$ 26
Cash collateral netted against derivative assets	68	$ 33
Collateral netted against derivative liabilities	80	37
Gross exposure on derivatives, after taking into account the effects of bilateral collateral and master netting agreements	244
Net exposure on derivatives, after taking into account, the effects of bilateral collateral and master netting agreements	87
Over-collateralization on derivatives to broker-dealers and banks, after the application of master netting agreements and collateral	83
Additional collateral held in the form of securities	4
Default reserve associated with uncollateralized contracts	5
Gross exposure on derivatives after taking into account effects of master netting agreements	490
Net exposure on derivatives with clients after application of master netting agreements collateral and related reserve	439
Net liability position totaled	2	1
Banking Subsidiary [Member]
Credit Derivatives [Line Items]
Net liability position totaled	78
Derivative assets included in net liability position	70
Derivative liabilities included in net liability position	(148)
Cash and securities collateral posted	$ 6
Number of credit risk derivatives held | derivative	0
Banking Subsidiary [Member] | Unsecured Debt [Member]
Credit Derivatives [Line Items]
Number of ratings above noninvestment | rating	4
Banking Subsidiary [Member] | Maximum [Member] | Unsecured Debt [Member]
Credit Derivatives [Line Items]
Payments to terminate contracts (less than for the $1 million)	$ 1	$ 4

Derivatives and Hedging Activ_4

Derivatives and Hedging Activities - Fair Values, Volume of Activity and Gain (Loss) Information Related to Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Notional Amount	$ 114,065	$ 102,645
Derivative assets, netting adjustments	(324)	(333)
Derivative Assets, net	524	529
Derivative liabilities, netting adjustments	(336)	(337)
Derivative Liabilities, net	157	353
Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	32,962	28,668
Derivative Assets	24	52
Derivative Liabilities	10	(10)
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	81,103	73,977
Derivative Assets	826	812
Derivative Liabilities	529	733
Interest Rate [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	32,840	28,546
Derivative Assets	24	50
Derivative Liabilities	10	(10)
Interest Rate [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	65,136	63,454
Derivative Assets	505	365
Derivative Liabilities	227	307
Foreign Exchange [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	122	122
Derivative Assets	0	2
Derivative Liabilities	0	0
Foreign Exchange [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	5,664	6,829
Derivative Assets	76	104
Derivative Liabilities	68	95
Commodity [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	6,622	2,002
Derivative Assets	233	333
Derivative Liabilities	223	323
Credit [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	415	226
Derivative Assets	1	1
Derivative Liabilities	3	1
Other [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	3,266	1,466
Derivative Assets	11	9
Derivative Liabilities	8	7
Net Derivatives [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	114,065	102,645
Derivative Assets, net	526	531
Derivative Liabilities, net	203	386
Counterparty And Cash Collateral Netting [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets, net	(2)	(2)
Derivative Liabilities, net	$ (46)	$ (33)

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Cumulative Basis Adjustments on Fair Value Hedges (Details) - Interest Rate [Member] - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Long-term Debt [Member]
Derivatives, Fair Value [Line Items]
Carrying amount of hedged item	$ 9,400	$ 9,363
Hedge accounting basis adjustment	87	(6)
Certificates of Deposit [Member]
Derivatives, Fair Value [Line Items]
Carrying amount of hedged item	340	343
Hedge accounting basis adjustment	0	(1)
Bank Time Deposits [Member]
Derivatives, Fair Value [Line Items]
Carrying amount of hedged item	176	178
Hedge accounting basis adjustment	0	0
Derivatives Not Designated as Hedging Instruments [Member] | Long-term Debt [Member]
Derivatives, Fair Value [Line Items]
Hedge accounting basis adjustment	$ (10)	$ (10)

Derivatives and Hedging Activ_6

Derivatives and Hedging Activities - Effect of Fair Value and Cash Flow Hedges on Income (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense — Long-term debt		$ (120)	$ (92)
Interest income — Loans		1,066	940
Deposits		(202)	(91)
Other income	[1]	10	21
Interest Rate [Member] | Interest Expense, Long-Term Debt [Member] | Fair Value Hedging [Member]
Gain (Loss) on Fair Value Hedges Recognized in Earnings [Abstract]
Recognized on hedged items		(93)	71
Recognized on derivatives designated as hedging instruments		82	(69)
Net income (expense) recognized on fair value hedges		(11)	2
Interest Rate [Member] | Interest Expense, Long-Term Debt [Member] | Cash Flow Hedging [Member]
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Realized gains (losses) (pre-tax) reclassified from AOCI into net income		(1)	(1)
Net income (expense) recognized on cash flow hedges		(1)	(1)
Interest Rate [Member] | Interest Income [Member] | Fair Value Hedging [Member]
Gain (Loss) on Fair Value Hedges Recognized in Earnings [Abstract]
Recognized on hedged items		0	0
Recognized on derivatives designated as hedging instruments		0	0
Net income (expense) recognized on fair value hedges		0	0
Interest Rate [Member] | Interest Income [Member] | Cash Flow Hedging [Member]
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Realized gains (losses) (pre-tax) reclassified from AOCI into net income		(24)	(2)
Net income (expense) recognized on cash flow hedges		(24)	(2)
Interest Rate [Member] | Interest Expense, Deposits [Member] | Fair Value Hedging [Member]
Gain (Loss) on Fair Value Hedges Recognized in Earnings [Abstract]
Recognized on hedged items		0	0
Recognized on derivatives designated as hedging instruments		0	0
Net income (expense) recognized on fair value hedges		0	0
Interest Rate [Member] | Interest Expense, Deposits [Member] | Cash Flow Hedging [Member]
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Realized gains (losses) (pre-tax) reclassified from AOCI into net income		0	0
Net income (expense) recognized on cash flow hedges		0	0
Interest Rate [Member] | Other Income [Member] | Fair Value Hedging [Member]
Gain (Loss) on Fair Value Hedges Recognized in Earnings [Abstract]
Recognized on hedged items		0	0
Recognized on derivatives designated as hedging instruments		0	0
Net income (expense) recognized on fair value hedges		0	0
Interest Rate [Member] | Other Income [Member] | Cash Flow Hedging [Member]
Cash Flow Hedges Derivative Instruments at Fair Value, Net [Abstract]
Realized gains (losses) (pre-tax) reclassified from AOCI into net income		0	0
Net income (expense) recognized on cash flow hedges		$ 0	$ 0
[1]	For the three months ended March 31, 2019 , and March 31, 2018 , net securities gains totaled less than $1 million. For the three months ended March 31, 2019 , and March 31, 2018

Derivatives and Hedging Activ_7

Derivatives and Hedging Activities - Derivative Instrument Cash Flow Hedge Earning Recognized by Income Statement Location (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	$ 106	$ (86)
Net Gains (Losses) Reclassified From OCI Into Income	(25)	(3)
Net Gains (Losses) Recognized in Other Income	0	0
Interest Income [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	115	(88)
Net Gains (Losses) Reclassified From OCI Into Income	(24)	(2)
Net Gains (Losses) Recognized in Other Income	0	0
Interest Expense [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	(1)	2
Net Gains (Losses) Reclassified From OCI Into Income	(1)	(1)
Net Gains (Losses) Recognized in Other Income	0	0
Underwriting Discounts Fees And Commissions [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	(5)
Net Gains (Losses) Reclassified From OCI Into Income	0
Net Gains (Losses) Recognized in Other Income	0
Other Income [Member] | Foreign Exchange [Member] | Net Investment Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	(3)	0
Net Gains (Losses) Reclassified From OCI Into Income	0	0
Net Gains (Losses) Recognized in Other Income	$ 0	$ 0

Derivatives and Hedging Activ_8

Derivatives and Hedging Activities - Pre-Tax Net Gains (Losses) on Derivatives Not Designated as Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	$ 12	$ 18
Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	6	11
Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	10	11
Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	1	3
Credit [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(6)	(3)
Other Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	1	(4)
Corporate Services Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	20	25
Corporate Services Income [Member] | Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	8	9
Corporate Services Income [Member] | Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	10	11
Corporate Services Income [Member] | Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	1	3
Corporate Services Income [Member] | Credit [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	1	2
Corporate Services Income [Member] | Other Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer Mortgage Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer Mortgage Income [Member] | Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer Mortgage Income [Member] | Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer Mortgage Income [Member] | Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer Mortgage Income [Member] | Credit [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Consumer Mortgage Income [Member] | Other Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(8)	(7)
Other Income [Member] | Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(2)	2
Other Income [Member] | Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Other Income [Member] | Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	0	0
Other Income [Member] | Credit [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(7)	(5)
Other Income [Member] | Other Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	$ 1	$ (4)

Derivatives and Hedging Activ_9

Derivatives and Hedging Activities - Fair Value of Derivative Assets by Type (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Credit Derivatives [Line Items]
Derivative assets before collateral	$ 594	$ 564
Less: Related collateral	68	33
Total derivative assets	526	531
Interest Rate [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	438	308
Foreign Exchange [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	49	60
Commodity [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	96	187
Credit [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	0	0
Other [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	$ 11	$ 9

Derivatives and Hedging Acti_10

Derivatives and Hedging Activities - Credit Derivatives Sold and Held (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Credit Derivatives [Line Items]
Notional Amount	$ 64	$ 22
Average Term (Years)	0 years	0 years
Payment / Performance Risk	0.00%	0.00%
Other [Member]
Credit Derivatives [Line Items]
Notional Amount	$ 64	$ 22
Average Term (Years)	14 years 21 days	13 years 5 months 4 days
Payment / Performance Risk	2.98%	17.18%

Derivatives and Hedging Acti_11

Derivatives and Hedging Activities - Credit Risk Contingent Feature (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	$ 4
Standard & Poor's, A- Rating [Member] | One Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	2	$ 2
Standard & Poor's, A- Rating [Member] | Two Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	2	2
Standard & Poor's, A- Rating [Member] | Three Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	2	2
Moody's, A3 Rating [Member] | One Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	2	2
Moody's, A3 Rating [Member] | Two Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	2	2
Moody's, A3 Rating [Member] | Three Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	$ 2	$ 2

Mortgage Servicing Assets - Cha

Mortgage Servicing Assets - Changes in Carrying Amount of Mortgage Servicing Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commercial Mortgage Backed Securities [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	$ 502	$ 412
Servicing retained from loan sales	18	27
Purchases	6	21
Amortization	(29)	(25)
Balance at end of period	497	435
Fair value at end of period	727	537
Residential Mortgage Backed Securities [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	37	31
Servicing retained from loan sales	2	2
Purchases	0	0
Amortization	(1)	(1)
Balance at end of period	38	32
Fair value at end of period	$ 50	$ 42

Mortgage Servicing Assets - Sch

Mortgage Servicing Assets - Schedule of Range and Weighted-Average of Significant Unobservable Inputs (Details) - Discounted Cash Flow [Member] - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commercial Mortgage Backed Securities [Member] | Minimum [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	1.00%	1.00%
Residual cash flows discount rate	7.00%	7.00%
Escrow earn rate	2.22%	2.17%
Loan assumption rate	0.00%	0.00%
Commercial Mortgage Backed Securities [Member] | Maximum [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	2.00%	3.00%
Residual cash flows discount rate	15.00%	15.00%
Escrow earn rate	3.70%	3.45%
Loan assumption rate	3.18%	2.84%
Commercial Mortgage Backed Securities [Member] | Weighted Average [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	1.14%	1.18%
Residual cash flows discount rate	9.19%	8.99%
Escrow earn rate	2.98%	2.84%
Loan assumption rate	1.39%	1.18%
Residential Mortgage Backed Securities [Member] | Minimum [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	7.50%	8.50%
Prepayment speed	9.32%	8.37%
Servicing cost	$ 62,000,000	$ 76,000,000
Residential Mortgage Backed Securities [Member] | Maximum [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	10.00%	11.00%
Prepayment speed	58.76%	48.63%
Servicing cost	$ 4,375,000,000	$ 4,385,000,000
Residential Mortgage Backed Securities [Member] | Weighted Average [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	7.54%	8.54%
Prepayment speed	9.93%	9.12%
Servicing cost	$ 68,230,000	$ 83,050,000

Mortgage Servicing Assets - Add

Mortgage Servicing Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Commercial Mortgage Backed Securities [Member]
Servicing Assets at Fair Value [Line Items]
Contractual fee income from servicing commercial mortgage loans	$ 46	$ 42
Amortization of servicing commercial mortgage loans	29	25
Residential Mortgage Backed Securities [Member]
Servicing Assets at Fair Value [Line Items]
Contractual fee income from servicing commercial mortgage loans	4	3
Amortization of servicing commercial mortgage loans	$ 1	$ 1

Leases - Narrative (Details)

Leases - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Lessee, Lease, Description [Line Items]
Amount of extension of lease term	5 years
Carrying amount of residual assets covered by residual value guarantees	$ 269
Carrying amount of operating lease assets	$ 961
Leases, Excluding Ground Leases [Member] | Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, lease term of operating or financing leases	1 year
Leases, Excluding Ground Leases [Member] | Maximum [Member]
Lessee, Lease, Description [Line Items]
Lessee, lease term of operating or financing leases	20 years
Ground Leases [Member]
Lessee, Lease, Description [Line Items]
Lessee, lease term of operating or financing leases	30 years

Leases - Components of Lease Ex

Leases - Components of Lease Expense and Income (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease cost	$ 34
Variable lease cost	5
Total lease cost	39
Amortization of right-of-use assets (less than $1 million)	1
Interest on lease liabilities (less than $1 million)	1
Short-term lease cost (less than $1 million)	$ 1

Leases - Summary of Cash Flows

Leases - Summary of Cash Flows Related to Leases (Details)	3 Months Ended
	Mar. 31, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 36,000,000
Operating cash flows from finance leases (less than $1 million)	1,000,000
Financing cash flows from finance leases (less than $1 million)	1,000,000
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	28,000,000
Finance leases	$ 0

Leases - Summary of Additional

Leases - Summary of Additional Balance Sheet Information (Details) $ in Millions	Mar. 31, 2019USD ($)
Leases [Abstract]
Operating lease assets	$ 694
Operating lease liabilities	787
Finance leases:
Property and equipment, gross	28
Accumulated depreciation	(16)
Property and equipment, net	12
Finance lease liabilities	$ 15

Leases - Summary of Information

Leases - Summary of Information Pertaining to Lease Term and Weighted-Average Discount Rate (Details)	Mar. 31, 2019
Weighted-average remaining lease term:
Operating leases	7 years 10 months 24 days
Finance leases	7 years 7 months 6 days
Weighted-average discount rate:
Operating leases	3.28%
Finance leases	4.12%

Leases - Summary of Maturities

Leases - Summary of Maturities of Lease Liabilities (Details) $ in Millions	Mar. 31, 2019USD ($)
Operating Leases
2019	$ 108
2020	139
2021	123
2022	108
2023	93
Thereafter	332
Total lease payments	903
Less imputed interest	116
Total	787
Finance Leases
2019	2
2020	3
2021	3
2022	3
2023	2
Thereafter	5
Total lease payments	18
Less imputed interest	3
Total	15
2019	110
2020	142
2021	126
2022	111
2023	95
Thereafter	337
Total lease payments	921
Less imputed interest	119
Total	$ 802

Leases - Components of Equipmen

Leases - Components of Equipment Leasing Income (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Sales-type and direct financing leases
Interest income on lease receivable	$ 30
Interest income related to accretion of unguaranteed residual asset	3
Interest income on deferred fees and costs	0
Total sales-type and direct financing lease income	33
Operating leases
Operating lease income related to lease payments	33
Other operating leasing gains	4
Total operating lease income and other leasing gains	37
Total lease income	$ 70

Leases - Composition of Net Inv

Leases - Composition of Net Investment in Sales-Type and Direct Financing Leases (Details) $ in Millions	Mar. 31, 2019USD ($)
Leases [Abstract]
Lease receivables	$ 3,597
Unearned income	(346)
Unguaranteed residual value	428
Deferred fees and costs	17
Net investment in sales-type and direct financing leases	$ 3,696

Leases - Minimum Future Lease P

Leases - Minimum Future Lease Payments to be Received for Sales-Type and Direct Financing Leases (Details) $ in Millions	Mar. 31, 2019USD ($)
Sales-type and direct financing lease payments
2019	$ 843
2020	928
2021	659
2022	435
2023	269
Thereafter	463
Total lease payments	$ 3,597

Leases - Minimum Future Lease_2

Leases - Minimum Future Lease Payments to be Received for Operating Leases (Details) $ in Millions	Mar. 31, 2019USD ($)
Leases [Abstract]
2019	$ 97
2020	121
2021	103
2022	87
2023	73
Thereafter	217
Total lease payments	$ 698

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Variable Interest Entity [Line Items]
Investments in operating partnerships	$ 269,000,000		$ 248,000,000
Liabilities related to investments in qualified affordable housing projects	2,000,000		2,000,000
Recurring [Member]
Variable Interest Entity [Line Items]
Other investments	103,000,000		115,000,000
LIHTC Investments [Member]
Variable Interest Entity [Line Items]
Investments in operating partnerships	5,948,000,000		5,932,000,000
Liabilities related to investments in qualified affordable housing projects	2,568,000,000		2,569,000,000
Tax credit of investment	40,000,000
LIHTC Investments [Member] | Qualified affordable housing projects investment [Member]
Variable Interest Entity [Line Items]
Liabilities related to investments in qualified affordable housing projects	499,000,000		532,000,000
LIHTC Investments [Member] | Accrued Income And Other Assets [Member]
Variable Interest Entity [Line Items]
Investments in operating partnerships	1,400,000,000		1,400,000,000
LIHTC Investments [Member] | Investments [Member]
Variable Interest Entity [Line Items]
Amortization of investment	46,000,000	$ 41,000,000
Tax credit of investment	45,000,000
Guaranteed Funds [Member] | Investments [Member]
Variable Interest Entity [Line Items]
VIE, assets that can only be used to settle obligations	0		0
VIE, liabilities	0		0
Measured at NAV [Member] | Recurring [Member] | Principal Investments Indirect [Member]
Variable Interest Entity [Line Items]
Other investments	$ 83,000,000		$ 96,000,000

Variable Interest Entities - Su

Variable Interest Entities - Summary of Variable Interest Entities Information (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Total Assets	$ 269	$ 248
Total Liabilities	2	2
LIHTC Investments [Member]
Variable Interest Entity [Line Items]
Total Assets	5,948	5,932
Total Liabilities	2,568	2,569
Maximum Exposure to Loss	1,715	1,740
KCC Indirect Investments [Member]
Variable Interest Entity [Line Items]
Total Assets	16,285	19,659
Total Liabilities	299	376
Maximum Exposure to Loss	$ 108	$ 122

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Tax Contingency [Line Items]
Total income tax expense (benefit), rate	17.00%	12.90%
Combined federal and state statutory tax rate		23.70%
Income tax benefit (as a percent)	0.90%	5.50%
Federal deferred tax asset	$ 24		$ 222
Valuation allowance	11		$ 11
Key Corp [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefits	36
First Niagara Bank, N.A. [Member]
Income Tax Contingency [Line Items]
Allocated bad debt deductions	$ 92

Acquisition, Divestiture, and_2

Acquisition, Divestiture, and Discontinued Operations - Additional Information (Details) $ in Millions	May 04, 2018USD ($)	Sep. 30, 2018USD ($)	Mar. 31, 2019USD ($)	Jan. 16, 2019Branch	Dec. 31, 2018USD ($)
Disposal Group, Not Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale	$ 73	$ 5
Discontinued Operations [Member] | Government Guaranteed Loans [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loans included in divestiture			$ 1,000		$ 1,100
Laurel Road Bank [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of bank branches excluded from transaction | Branch				3

Securities Financing Activiti_3

Securities Financing Activities - Summarized Securities Financing Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	$ 0	$ 0
Total	0	0
Repurchase agreements	0	0
Total	0	0
Counterparty And Cash Collateral Netting [Member]
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	(7)	0
Total	(7)	0
Repurchase agreements	(261)	(305)
Total	(261)	(305)
Federal Agency CMOs [Member]
Securities Financing Transaction [Line Items]
Assets pledged as collateral	370
Liabilities pledged as collateral	261
Gross Amounts Presented In Balance Sheets [Member]
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	12	14
Total	12	14
Repurchase agreements	266	319
Total	266	319
Netting Adjustments [Member]
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	(5)	(14)
Total	(5)	(14)
Repurchase agreements	(5)	(14)
Total	$ (5)	$ (14)

Employee Benefits - Net Pension

Employee Benefits - Net Pension Cost (Benefit) for All Funded and Unfunded Plans (Details) - Pension Plans [Member] - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Interest cost on PBO	$ 11	$ 10
Expected return on plan assets	(12)	(13)
Amortization of losses	4	4
Net pension/postretirement benefit cost	$ 3	$ 1

Trust Preferred Securities Is_3

Trust Preferred Securities Issued by Unconsolidated Subsidiaries - Summary of Trust Preferred Securities, Common Stock and Related Debentures (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Stock	$ 1,257	$ 1,257
Debentures adjustments related to financial instrument hedging	51	46
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 of Debentures, Net of Discount	$ 162
Interest Rate of Trust Preferred Securities and Debentures	3.537%
KeyCorp Capital II [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 102
Common Stock	4
Principal Amount of of Debentures, Net of Discount	$ 106
Interest Rate of Trust Preferred Securities and Debentures	6.875%
KeyCorp Capital III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 134
Common Stock	4
Principal Amount of of Debentures, Net of Discount	$ 138
Interest Rate of Trust Preferred Securities and Debentures	7.75%
HNC Statutory Trust III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 19
Common Stock	1
Principal Amount of of Debentures, Net of Discount	$ 20
Interest Rate of Trust Preferred Securities and Debentures	4.051%
Willow Grove Statutory Trust I [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 18
Common Stock	1
Principal Amount of of Debentures, Net of Discount	$ 19
Interest Rate of Trust Preferred Securities and Debentures	3.921%
HNC Statutory Trust IV [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 16
Common Stock	1
Principal Amount of of Debentures, Net of Discount	$ 17
Interest Rate of Trust Preferred Securities and Debentures	4.031%
Westbank Capital Trust II [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 7
Common Stock	0
Principal Amount of of Debentures, Net of Discount	$ 7
Interest Rate of Trust Preferred Securities and Debentures	4.823%
Westbank Capital Trust III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 7
Common Stock	0
Principal Amount of of Debentures, Net of Discount	$ 7
Interest Rate of Trust Preferred Securities and Debentures	4.823%
Business Trusts [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 459	454
Common Stock	17	17
Principal Amount of of Debentures, Net of Discount	$ 476	$ 471
Interest Rate of Trust Preferred Securities and Debentures	5.604%	5.447%
Treasury Rate [Member] | KeyCorp Capital II [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Basis spread on variable rate	0.20%
Treasury Rate [Member] | KeyCorp Capital III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Basis spread on variable rate	0.25%
London Interbank Offered Rate (LIBOR) [Member] | KeyCorp Capital I [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Basis spread on variable rate	0.74%
London Interbank Offered Rate (LIBOR) [Member] | HNC Statutory Trust III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Basis spread on variable rate	1.40%
London Interbank Offered Rate (LIBOR) [Member] | Willow Grove Statutory Trust I [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Basis spread on variable rate	1.31%
London Interbank Offered Rate (LIBOR) [Member] | HNC Statutory Trust IV [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Basis spread on variable rate	1.28%
London Interbank Offered Rate (LIBOR) [Member] | Westbank Capital Trust II and III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Basis spread on variable rate	2.19%
Redemption upon either tax or a capital treatment event [Member] | Treasury Rate [Member] | Keycorp Capital II and III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Basis spread on variable rate	0.50%

Contingent Liabilities and Gu_3

Contingent Liabilities and Guarantees - Guarantees (Details) $ in Millions	Mar. 31, 2019USD ($)
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	$ 11,938
Liability Recorded	134
Written Put Options [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	3,065
Liability Recorded	46
Standby Letters of Credit [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	3,112
Liability Recorded	76
Recourse Agreement with FNMA [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	4,185
Liability Recorded	6
Residential Mortgage Reserve [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	$ 1,576

Contingent Liabilities and Gu_4

Contingent Liabilities and Guarantees - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)
Commitments Contingencies And Guarantees [Line Items]
Default guarantees, value	$ 134
Written Put Options [Member]
Commitments Contingencies And Guarantees [Line Items]
Default guarantees, value	$ 46
Weighted average life of written put options	3 years
Standby Letters of Credit [Member]
Commitments Contingencies And Guarantees [Line Items]
Remaining weighted-average life of standby letters of credit in years	2 years
Default guarantees, value	$ 76
Recourse Agreement with FNMA [Member]
Commitments Contingencies And Guarantees [Line Items]
Weighted-average remaining term for outstanding commercial mortgage loans in years	7 years 9 months 18 days
Unpaid principal balance outstanding of loans sold	$ 14,500
Maximum potential amount of undiscounted future payments possibly required as percentage of principal balance of loans outstanding	29.00%
Default guarantees, value	$ 6
Residential Mortgage Reserve [Member]
Commitments Contingencies And Guarantees [Line Items]
Unpaid principal balance outstanding of loans sold	$ 5,300
Maximum potential amount of undiscounted future payments possibly required as percentage of principal balance of loans outstanding	30.00%
Weighted-average loan to value ratio (as a percent)	74.00%
Liability for estimated repurchase obligations on loans sold	$ 6
Minimum [Member] | Standby Letters of Credit [Member]
Commitments Contingencies And Guarantees [Line Items]
Remaining actual life of standby letters of credit	1 year
Minimum [Member] | Low [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee obligations, percentage	0.00%
Minimum [Member] | Moderate [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee obligations, percentage	30.00%
Minimum [Member] | High [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee obligations, percentage	70.00%
Maximum [Member] | Standby Letters of Credit [Member]
Commitments Contingencies And Guarantees [Line Items]
Remaining actual life of standby letters of credit	16 years
Maximum [Member] | Low [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee obligations, percentage	30.00%
Maximum [Member] | Moderate [Member]
Commitments Contingencies And Guarantees [Line Items]
Guarantee obligations, percentage	70.00%

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income - Changes in AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 15,596
Other comprehensive income before reclassification, net of income taxes	266	$ (217)
Amounts reclassified from AOCI, net of income taxes	22	5
Total other comprehensive income (loss), net of tax	288	(212)
Ending Balance	15,926
Unrealized Gains (Losses) on Securities Available for Sale [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(373)	(311)
Other comprehensive income before reclassification, net of income taxes	184	(150)
Amounts reclassified from AOCI, net of income taxes	0	0
Total other comprehensive income (loss), net of tax	184	(150)
Ending Balance	(189)	(461)
Unrealized Gains (Losses) on Derivative Financial Instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(50)	(86)
Other comprehensive income before reclassification, net of income taxes	80	(65)
Amounts reclassified from AOCI, net of income taxes	19	2
Total other comprehensive income (loss), net of tax	99	(63)
Ending Balance	49	(149)
Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(14)	9
Other comprehensive income before reclassification, net of income taxes	3	(2)
Amounts reclassified from AOCI, net of income taxes	0	0
Total other comprehensive income (loss), net of tax	3	(2)
Ending Balance	(11)	7
Net Pension and Postretirement Benefit Costs [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(381)	(391)
Other comprehensive income before reclassification, net of income taxes	(1)	0
Amounts reclassified from AOCI, net of income taxes	3	3
Total other comprehensive income (loss), net of tax	2	3
Ending Balance	(379)	(388)
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(818)	(779)
Total other comprehensive income (loss), net of tax	288	(212)
Ending Balance	$ (530)	$ (991)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income — Loans	$ 1,066	$ 940
Interest expense — Long-term debt	(120)	(92)
Income (loss) from continuing operations before income taxes	496	486
Income taxes	82	62
Personnel expense	563	594
INCOME (LOSS) FROM CONTINUING OPERATIONS	406	416
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	(25)	(3)
Income taxes	(6)	(1)
INCOME (LOSS) FROM CONTINUING OPERATIONS	(19)	(2)
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	(4)	(4)
Income taxes	(1)	(1)
INCOME (LOSS) FROM CONTINUING OPERATIONS	(3)	(3)
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)
Interest Income [Member] | 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	(24)	(2)
Interest Expense [Member] | 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]
Interest expense — Long-term debt	$ (1)	$ (1)

Shareholders' Equity - Comprehe

Shareholders' Equity - Comprehensive Capital Plan (Details) - USD ($)	3 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Mar. 31, 2018	Apr. 18, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Repurchase of common shares		$ 167,000,000	$ 156,000,000
Cash dividends declared on common shares (in usd per share)		$ 0.17	$ 0.105
2018 Capital Plan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Authorized amount of share repurchases		$ 1,225,000,000
Common shares repurchased, value		199,000,000
Repurchase of common shares		167,000,000
Employee equity compensation program Common Share repurchases		$ 32,000,000
Cash dividends declared on common shares (in usd per share)		$ 0.17
Subsequent Event [Member] | 2019 Capital Plan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Authorized amount of share repurchases				$ 1,000,000,000
Scenario, Forecast [Member] | 2019 Capital Plan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Cash dividends declared on common shares (in usd per share)	$ 0.185

Shareholders' Equity - Schedule

Shareholders' Equity - Schedule of Preferred Stock (Details)	Mar. 31, 2019USD ($)$ / sharesshares
Series D Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, amount outstanding | $	$ 525,000,000
Preferred stock, shares authorized (in shares) | shares	21,000
Preferred stock, shares outstanding (in shares) | shares	21,000
Preferred stock, par value (in usd per share)	$ 1
Preferred stock, liquidation preference, value | $	$ 25,000
Depository Shares, Series D [Member]
Class of Stock [Line Items]
Depository receipt ratio	0.04
Preferred stock, liquidation preference (in usd per share)	$ 1,000
Dividend payable per share (in usd per share)	$ 12.50
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, amount outstanding | $	$ 500,000,000
Preferred stock, shares authorized (in shares) | shares	500,000
Preferred stock, shares outstanding (in shares) | shares	500,000
Preferred stock, par value (in usd per share)	$ 1
Preferred stock, liquidation preference, value | $	$ 1,000
Depository Shares, Series E [Member]
Class of Stock [Line Items]
Depository receipt ratio	0.025
Preferred stock, liquidation preference (in usd per share)	$ 25
Dividend payable per share (in usd per share)	$ 0.382813
Series F Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, amount outstanding | $	$ 425,000,000
Preferred stock, shares authorized (in shares) | shares	425,000
Preferred stock, shares outstanding (in shares) | shares	425,000
Preferred stock, par value (in usd per share)	$ 1
Preferred stock, liquidation preference, value | $	$ 1,000
Depository Shares, Series F [Member]
Class of Stock [Line Items]
Depository receipt ratio	0.025
Preferred stock, liquidation preference (in usd per share)	$ 25
Dividend payable per share (in usd per share)	$ 0.353125

Shareholders' Equity - Preferre

Shareholders' Equity - Preferred Stock (Details)	Apr. 29, 2019USD ($)$ / shares	Mar. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Class of Stock [Line Items]
Preferred stock issued		$ 1,450,000,000	$ 1,450,000,000
Subsequent Event [Member] | Series G Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock issued	$ 450,000,000
Preferred stock, par value (in usd per share) | $ / shares	$ 1
Preferred stock, liquidation preference, value	$ 1,000
Subsequent Event [Member] | Depository Shares, Series G [Member]
Class of Stock [Line Items]
Depository receipt ratio	0.025
Preferred stock, liquidation preference (in usd per share) | $ / shares	$ 25

Business Segment Reporting - Ad

Business Segment Reporting - Additional Information (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2019USD ($)Branchindustry_sectorSegment	Dec. 31, 2018USD ($)Segment
Segment Reporting Information [Line Items]
Number of operating segments | Segment	2	2
Goodwill	$ 2,516	$ 2,516
Consumer Bank [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 1,600
Number Of State Branch Network | Branch	15
Commercial Bank [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 912
Number Of Industrial Sectors | industry_sector	7

Business Segment Reporting - Sc

Business Segment Reporting - Schedule of Segment Reporting Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019USD ($)employee	Mar. 31, 2018USD ($)employee
SUMMARY OF OPERATIONS
Net interest income (TE)	$ 985	$ 952
Noninterest income	536	601
Total revenue (TE)	1,521	1,553
Provision for credit losses	62	61
Depreciation and amortization expense	88	103
Other noninterest expense	875	903
Income (loss) from continuing operations before income taxes (TE)	496	486
Allocated income taxes and TE adjustments	90	70
INCOME (LOSS) FROM CONTINUING OPERATIONS	406	416
Income (loss) from discontinued operations, net of taxes	1	2
NET INCOME (LOSS)	407	418
Less: Net income (loss) attributable to noncontrolling interests	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY	407	418
AVERAGE BALANCES
Loans and leases	89,649	86,927
Total assets	140,120	134,915
Deposits	107,576	102,556
OTHER FINANCIAL DATA
Net loan charge-offs	$ 64	$ 54
Return on average allocated equity, continuing operations	10.49%	11.33%
Return on average allocated equity	10.51%	11.39%
Average full-time equivalent employees | employee	17,554	18,540
Operating Segments [Member] | Consumer Bank [Member]
SUMMARY OF OPERATIONS
Net interest income (TE)	$ 594	$ 553
Noninterest income	214	229
Total revenue (TE)	808	782
Provision for credit losses	45	34
Depreciation and amortization expense	23	27
Other noninterest expense	524	549
Income (loss) from continuing operations before income taxes (TE)	216	172
Allocated income taxes and TE adjustments	52	41
INCOME (LOSS) FROM CONTINUING OPERATIONS	164	131
Income (loss) from discontinued operations, net of taxes	0	0
NET INCOME (LOSS)	164	131
Less: Net income (loss) attributable to noncontrolling interests	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY	164	131
AVERAGE BALANCES
Loans and leases	31,403	31,647
Total assets	34,814	34,802
Deposits	71,289	67,421
OTHER FINANCIAL DATA
Net loan charge-offs	$ 34	$ 35
Return on average allocated equity, continuing operations	19.83%	16.41%
Return on average allocated equity	19.83%	16.41%
Average full-time equivalent employees | employee	9,631	10,106
Operating Segments [Member] | Commercial Bank [Member]
SUMMARY OF OPERATIONS
Net interest income (TE)	$ 399	$ 405
Noninterest income	300	325
Total revenue (TE)	699	730
Provision for credit losses	15	28
Depreciation and amortization expense	29	35
Other noninterest expense	338	346
Income (loss) from continuing operations before income taxes (TE)	317	321
Allocated income taxes and TE adjustments	64	45
INCOME (LOSS) FROM CONTINUING OPERATIONS	253	276
Income (loss) from discontinued operations, net of taxes	0	0
NET INCOME (LOSS)	253	276
Less: Net income (loss) attributable to noncontrolling interests	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY	253	276
AVERAGE BALANCES
Loans and leases	57,210	54,131
Total assets	64,817	61,750
Deposits	34,418	32,794
OTHER FINANCIAL DATA
Net loan charge-offs	$ 30	$ 19
Return on average allocated equity, continuing operations	23.66%	25.31%
Return on average allocated equity	23.66%	25.31%
Average full-time equivalent employees | employee	2,360	2,457
Other [Member]
SUMMARY OF OPERATIONS
Net interest income (TE)	$ (8)	$ (6)
Noninterest income	22	47
Total revenue (TE)	14	41
Provision for credit losses	2	(1)
Depreciation and amortization expense	36	41
Other noninterest expense	13	8
Income (loss) from continuing operations before income taxes (TE)	(37)	(7)
Allocated income taxes and TE adjustments	(26)	(16)
INCOME (LOSS) FROM CONTINUING OPERATIONS	(11)	9
Income (loss) from discontinued operations, net of taxes	1	2
NET INCOME (LOSS)	(10)	11
Less: Net income (loss) attributable to noncontrolling interests	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY	(10)	11
AVERAGE BALANCES
Loans and leases	1,036	1,149
Total assets	40,489	38,363
Deposits	1,869	2,341
OTHER FINANCIAL DATA
Net loan charge-offs	$ 0	$ 0
Return on average allocated equity, continuing operations	(0.56%)	0.50%
Return on average allocated equity	(0.51%)	0.62%
Average full-time equivalent employees | employee	5,563	5,977

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2019USD ($)Segment	Mar. 31, 2018USD ($)	Dec. 31, 2018Segment
Disaggregation of Revenue [Line Items]
Number of operating segments | Segment	2		2
Total revenue from contracts with customers	$ 299	$ 320
Noninterest income	536	601
Contract assets	0	0
Contract liabilities	0	0
Trust And Investment Services [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	100	119
Investment Banking And Debt Placement [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	45	47
Service Charges On Deposit Accounts [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	87	89
Cards And Payments [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	64	60
Other Noninterest Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3	5
Noninterest income	215	234
Operating Segments [Member] | Community Banking [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	186	199
Operating Segments [Member] | Community Banking [Member] | Trust And Investment Services [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	85	99
Operating Segments [Member] | Community Banking [Member] | Investment Banking And Debt Placement [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
Operating Segments [Member] | Community Banking [Member] | Service Charges On Deposit Accounts [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	60	61
Operating Segments [Member] | Community Banking [Member] | Cards And Payments [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	38	34
Operating Segments [Member] | Community Banking [Member] | Other Noninterest Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3	5
Operating Segments [Member] | Key Corporate Bank [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	113	121
Operating Segments [Member] | Key Corporate Bank [Member] | Trust And Investment Services [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	15	20
Operating Segments [Member] | Key Corporate Bank [Member] | Investment Banking And Debt Placement [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	45	47
Operating Segments [Member] | Key Corporate Bank [Member] | Service Charges On Deposit Accounts [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	27	28
Operating Segments [Member] | Key Corporate Bank [Member] | Cards And Payments [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	26	26
Operating Segments [Member] | Key Corporate Bank [Member] | Other Noninterest Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
Other [Member]
Disaggregation of Revenue [Line Items]
Noninterest income	$ 22	$ 47