KeyCorp (KEY) 10-Q 4 May 20 2020 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2020	Apr. 27, 2020
Entity Information [Line Items]
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Entity File Number	001-11302
Entity Registrant Name	KeyCorp
Entity Incorporation, State or Country Code	OH
Entity Tax Identification Number	34-6542451
Entity Address, Address Line One	127 Public Square,
Entity Address, City or Town	Cleveland,
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	44114-1306
City Area Code	216
Local Phone Number	689-3000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		975,405,589
Amendment Flag	false
Entity Central Index Key	0000091576
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Document Quarterly Report	true
Document Transition Report	false
Common Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Common Shares, $1 par value
Trading Symbol	KEY
Security Exchange Name	NYSE
Series E Preferred Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Perpetual Non-Cumulative Preferred Stock, Series E)
Trading Symbol	KEY PrI
Security Exchange Name	NYSE
Series F Preferred Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Cumulative Preferred Stock, Series F)
Trading Symbol	KEY PrJ
Security Exchange Name	NYSE
Series G Preferred Stock [Member]
Entity Information [Line Items]
Title of 12(b) Security	Cumulative Preferred Stock, Series G)
Trading Symbol	KEY PrK
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions		Mar. 31, 2020	Dec. 31, 2019
ASSETS
Cash and due from banks		$ 865	$ 732
Short-term investments		4,073	1,272
Trading account assets		795	1,040
Securities available for sale		20,807	21,843
Held-to-maturity securities (fair value: $10,012 and $10,116)		9,638	10,067
Other investments		679	605
Loans, net of unearned income of $575 and $603		103,198	94,646
Less: Allowance for loan and lease losses		(1,359)	(900)
Net loans		101,839	93,746
Loans held for sale	[1]	2,143	1,334
Premises and equipment		791
Premises and equipment			814
Goodwill		2,664	2,664
Other intangible assets		236	253
Corporate-owned life insurance		4,243	4,233
Accrued income and other assets		6,604	5,494
Discontinued assets		820	891
Total assets		156,197	144,988
Deposits in domestic offices:
NOW and money market deposit accounts		71,005	66,714
Savings deposits		4,753	4,651
Certificates of deposit ($100,000 or more)		5,630	6,598
Other time deposits		4,623	5,054
Total interest-bearing deposits		86,011	83,017
Noninterest-bearing deposits		29,293	28,853
Total deposits		115,304	111,870
Federal funds purchased and securities sold under repurchase agreements		2,444	387
Bank notes and other short-term borrowings		4,606	705
Accrued expense and other liabilities		2,700	2,540
Long-term debt		13,732	12,448
Total liabilities		138,786	127,950
EQUITY
Preferred stock		1,900	1,900
Common Shares, $1 par value; authorized 2,100,000,000 and 2,100,000,000 shares; issued 1,256,702,081 and 1,256,702,081 shares		1,257	1,257
Capital surplus		6,222	6,295
Retained earnings		12,174	12,469
Treasury stock, at cost (281,383,095 and 279,513,530 shares)		(4,956)	(4,909)
Accumulated other comprehensive income (loss)		814	26
Key shareholders’ equity		17,411	17,038
Noncontrolling interests		0	0
Total equity		17,411	17,038
Total liabilities and equity		$ 156,197	$ 144,988
[1]	Total loans held for sale include real estate — residential mortgage loans held for sale at fair value of $152 million at March 31, 2020 , and $140 million at December 31, 2019 .

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Held-to-maturity securities, fair value	$ 10,012,000,000	$ 10,116,000,000
Unearned income on loans	575,000,000	603,000,000
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)	2,100,000,000	1,400,000,000
Common shares, shares issued (in shares)	1,256,702,081	1,256,702,081
Treasury stock, shares (in shares)	281,383,095	279,513,530
Residential Mortgage [Member]
Loans held for sale	$ 152,000,000	$ 140,000,000

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
INTEREST INCOME
Loans		$ 1,026	$ 1,066
Loans held for sale		19	13
Securities available for sale		129	129
Held-to-maturity securities		62	68
Trading account assets		8	8
Short-term investments		6	16
Other investments		1	4
Total interest income		1,251	1,304
INTEREST EXPENSE
Deposits		169	202
Federal funds purchased and securities sold under repurchase agreements		6	1
Bank notes and other short-term borrowings		5	4
Long-term debt		90	120
Total interest expense		270	327
NET INTEREST INCOME		981	977
Provision for credit losses		359	62
Net interest income after provision for credit losses		622	915
NONINTEREST INCOME
Trust and investment services income		133	115
Investment banking and debt placement fees		116	110
Service charges on deposit accounts		84	82
Operating lease income and other leasing gains		30	37
Corporate services income		62	55
Cards and payments income		66	66
Corporate-owned life insurance income		36	32
Consumer mortgage income		20	11
Commercial mortgage servicing fees		18	18
Other income	[1]	(88)	10
Total noninterest income		477	536
NONINTEREST EXPENSE
Personnel		515	563
Net occupancy		76	72
Computer processing		55	54
Business services and professional fees		44	44
Equipment		24	24
Operating lease expense		36	26
Marketing		21	19
FDIC assessment		9	7
Intangible asset amortization		17	22
OREO expense, net		3	3
Other expense		131	129
Total noninterest expense		931	963
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		168	488
Income taxes		23	82
INCOME (LOSS) FROM CONTINUING OPERATIONS		145	406
Income (loss) from discontinued operations		1	1
NET INCOME (LOSS)		146	407
Less: Net income (loss) attributable to noncontrolling interests		0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY		146	407
Income (loss) from continuing operations attributable to Key common shareholders		118	386
Net income (loss) attributable to Key common shareholders		$ 119	$ 387
Per Common Share:
Income (loss) from continuing operations attributable to Key common shareholders (in usd per share)		$ 0.12	$ 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]	0.12	0.38
Per Common Share — assuming dilution:
Income (loss) from continuing operations attributable to Key common shareholders (in usd per share)		0.12	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]	0.12	0.38
Cash dividends declared per common share (in usd per share)		$ 0.185	$ 0.17
Weighted-average common shares outstanding (000) (in shares)		967,446	1,006,717
Effect of common share options and other stock awards (in shares)		8,664	9,787
Weighted-average common shares and potential common shares outstanding (in shares)	[3]	976,110	1,016,504
[1]	For the three months ended March 31, 2020 , net securities gains (losses) totaled $4 million . For the three months ended March 31, 2019 , net securities gains (losses) totaled less than $1 million . For the three months ended March 31, 2020 , and March 31, 2019 , Key did no t have any impairment losses related to securities.
[2]	EPS may not foot due to rounding.
[3]	Assumes conversion of Common Share options and other stock awards and/or convertible preferred stock, as applicable.

Consolidated Statements of In_2

Consolidated Statements of Income (Parenthetical) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net securities gains (less than $1 million)	$ 4,000,000	$ 0
Impaired losses related to securities	$ 0	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 146	$ 407
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale, net of income taxes of $126 and $56	405	184
Net unrealized gains (losses) on derivative financial instruments, net of income taxes of $117 and $31	377	99
Foreign currency translation adjustments, net of income taxes of $0 and $0	0	3
Net pension and postretirement benefit costs, net of income taxes of $2 and $1	6	2
Total other comprehensive income (loss), net of tax	788	288
Comprehensive income (loss)	934	695
Less: Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income (loss) attributable to Key	$ 934	$ 695

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Income taxes effect on net unrealized (losses) gains on securities available for sale	$ (126)	$ (56)
Income taxes effect on net unrealized gains (losses) on derivative financial instruments	(117)	(31)
Income taxes effect on foreign currency translation adjustments	0	0
Income taxes effect on net pension and postretirement benefit costs	$ 2	$ 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]	Series G 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]	Retained Earnings [Member]Series G 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						$ 1,450	$ 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						$ 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						946,000
Ending Balance, Common Shares (in shares) at Mar. 31, 2019							1,013,186,000
Ending Balance at Mar. 31, 2019						$ 1,450	$ 1,257	6,259	11,771					(4,283)	(530)	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance						1,450	1,257	6,259	11,771					(4,283)	(530)	2
Beginning Balance	17,038					$ 1,900	$ 1,257	6,295	12,469					(4,909)	26	0
Beginning Balance, Preferred Shares (in shares) at Dec. 31, 2019						1,396,000
Beginning Balance, Common Shares (in shares) at Dec. 31, 2019							977,189,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	17,411					$ 1,900	$ 1,257	6,222	12,174					(4,956)	814	0
Net income (loss)	146								146							0
Other comprehensive income (loss)	788														788
Deferred compensation								(1)
Cash dividends declared on common shares									(181)
Cash dividends declared on preferred stock										$ (7)	$ (8)	$ (6)	$ (6)
Open market common share repurchases (in shares)							(6,067,000)
Open market Common Share repurchases														(117)
Employee equity compensation program Common Share repurchases (in shares)							(1,795,000)
Employee equity compensation program Common Share repurchases								(72)						(35)
Common shares reissued (returned) for stock options and other employee benefit plans, shares							5,992,000
Common Shares reissued (returned) for stock options and other employee benefit plans								0						105
Net contribution from (distribution to) noncontrolling interests																0
Ending Balance, Preferred Shares (in shares) at Mar. 31, 2020		21,000	500,000	425,000	450,000	1,396,000
Ending Balance, Common Shares (in shares) at Mar. 31, 2020							975,319,000
Ending Balance at Mar. 31, 2020	17,411					$ 1,900	$ 1,257	6,222	12,174					(4,956)	814	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 17,411					$ 1,900	$ 1,257	$ 6,222	$ 12,174					$ (4,956)	$ 814	$ 0

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash dividends declared on common shares (in usd per share)	$ 0.185	$ 0.17
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	$ 0.353125
Series G Preferred Stock [Member]
Cash dividends declared on Preferred Stock (in usd per share)	$ 0.351563

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
OPERATING ACTIVITIES
Net income (loss)	$ 146	$ 407
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Provision for credit losses	359	62
Depreciation and amortization expense, net	54	58
Accretion of acquired loans	10	17
Increase in cash surrender value of corporate-owned life insurance	(29)	(28)
Stock-based compensation expense	25	25
Deferred income taxes (benefit)	(18)	99
Proceeds from sales of loans held for sale	2,687	2,045
Originations of loans held for sale, net of repayments	(3,256)	(1,679)
Net losses (gains) on sales of loans held for sale	(38)	(28)
Net losses (gains) on leased equipment	6	2
Net securities losses (gains)	(4)	0
Net losses (gains) on sales of fixed assets	2	(1)
Net decrease (increase) in trading account assets	245	(130)
Other operating activities, net	(362)	(289)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(173)	560
INVESTING ACTIVITIES
Net decrease (increase) in short-term investments, excluding acquisitions	(2,801)	50
Purchases of securities available for sale	(190)	(1,842)
Proceeds from sales of securities available for sale	583	0
Proceeds from prepayments and maturities of securities available for sale	1,176	655
Proceeds from prepayments and maturities of held-to-maturity securities	434	295
Purchases of held-to-maturity securities	(4)	(9)
Purchases of other investments	(91)	(16)
Proceeds from sales of other investments	2	7
Proceeds from prepayments and maturities of other investments	10	32
Net decrease (increase) in loans, excluding acquisitions, sales and transfers	(8,902)	(780)
Proceeds from sales of portfolio loans	54	61
Proceeds from corporate-owned life insurance	19	16
Purchases of premises, equipment, and software	(12)	(9)
Proceeds from sales of premises and equipment	0	1
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(9,722)	(1,539)
FINANCING ACTIVITIES
Net increase (decrease) in deposits, excluding acquisitions	3,434	866
Net increase (decrease) in short-term borrowings	5,958	83
Net proceeds from issuance of long-term debt	2,497	1,351
Payments on long-term debt	(1,506)	(1,000)
Open market Common Share repurchases	(117)	(167)
Employee equity compensation program Common Share repurchases	(35)	(32)
Net proceeds from reissuance of Common Shares	5	3
Cash dividends paid	(208)	(192)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	10,028	912
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	133	(67)
CASH AND DUE FROM BANKS AT BEGINNING OF PERIOD	732	678
CASH AND DUE FROM BANKS AT END OF PERIOD	865	611
Additional disclosures relative to cash flows:
Interest paid	267	306
Income taxes paid (refunded)	35	34
Noncash items:
Reduction of secured borrowing and related collateral	1	1
Loans transferred to portfolio from held for sale	10	5
Loans transferred to held for sale from portfolio	210	(10)
Loans transferred to OREO	92	0
CMBS risk retentions	12	9
ABS risk retentions	$ 11	$ 0

Basis of Presentation and Accou

Basis of Presentation and Accounting Policies	3 Months Ended
	Mar. 31, 2020
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 2019 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 2020 Measurement of Credit Losses on Financial Instruments (ASU 2016-13, ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2019-11, ASU 2020-02, ASU 2020-03) On January 1, 2020, we adopted ASU 2016-13, Financial Instruments - Credit Losses (ASC 326): Measurement of Credit Losses on Financial Instruments, which replaces the incurred-loss methodology that recognized losses when a probable threshold was met with an expected-loss methodology, specifically, recognizing current expected credit losses (CECL) for the remaining life of the asset at the time of origination or acquisition. The CECL methodology applies to loans, debt securities, and other financial assets and net investment in leases measured at amortized cost. It also applies to off-balance sheet credit exposures (loan commitments, standby letters of credit, financial guarantees, and other similar instruments). Assets in the scope of ASC 326 are presented at the net amount expected to be collected after deducting the allowance for credit losses from the amortized cost basis of the assets. ASC 326 also requires credit losses relating to available-for-sale debt securities that management does not intend to sell or believes that it is more likely than not they will be required to sell to be recorded through an allowance rather than a reduction of the carrying amount. ASC 326 replaces the purchased credit impaired concept of accounting, previously required under Subtopic 310-30, with a purchased financial assets with credit deterioration (PCD) concept. In accordance with ASC 326, we did not reassess whether recognized purchased credit impaired loans met the criteria of a PCD loan and modifications to individual acquired loans accounted for in pools were TDRs as of the date of adoption. At adoption, we elected to not maintain the pools of loans previously accounted for under Subtopic 310-30. The prospective application resulted in a $4 million adjustment to the amortized cost basis of PCD loans to reflect the addition to the allowance for loans and leases as of January 1, 2020. After the adjustment for the allowance for the loans and leases, the noncredit discount of $15 million will be accreted to interest income using the interest method based on the effective interest rate determined after the adjustment from credit losses as of January 1, 2020. The ASU requires use of a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. Results for reporting periods beginning after January 1, 2020, are presented under ASC 326 while prior period amounts continue to be reported in accordance with previously applicable GAAP. We posted an adjusting entry decreasing retained earnings as of January 1, 2020, by $230 million , net of deferred taxes of $71 million , for the cumulative effect of adopting ASC 326. The main drivers of the adjustment to retained earnings are summarized in the following table. Pre-ASC 326 Adoption Impact of ASC 326 Adoption As Reported Under ASC 326 in millions December 31, 2019 January 1, 2020 Allowance for credit losses Commercial Commercial and industrial $ 551 $ (141 ) $ 410 Real estate — commercial mortgage 143 16 159 Real estate — construction 22 (7 ) 15 Commercial lease financing 35 8 43 Total commercial loans 751 (124 ) 627 Consumer Real estate — residential mortgage 7 77 84 Home equity loans 31 147 178 Consumer direct loans 34 63 97 Credit cards 47 35 82 Consumer indirect loans 30 6 36 Total consumer loans 149 328 477 Total ALLL — continuing operations 900 204 1,104 Discontinued operations 10 31 41 Total ALLL 910 235 1,145 Accrued expense and other liabilities 75 70 145 Total allowance for credit losses $ 985 $ 305 $ 1,290 In conjunction with the adoption of ASC 326, the following are additional disclosures about our significant accounting policies related to CECL. Allowance for Held-to-Maturity Securities Debt securities that we have the intent and ability to hold until maturity are classified as held-to-maturity and are carried at cost and adjusted for amortization of premiums and accretion of discounts using the interest method. This method produces a constant rate of return on the adjusted carrying amount. Management classifies the held-to-maturity portfolio into the following major security types: agency residential collateralized mortgage obligations, agency residential mortgage-backed securities, agency commercial mortgage-backed securities, asset backed securities, and other. Management measures expected credit losses on held-to-maturity securities on a collective basis by major security type. The estimate of expected losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. We do not measure expected credit losses on held-to-maturity securities in which historical credit loss information adjusted for current conditions and reasonable and supportable forecasts results in an expectation that nonpayment of the amortized cost basis is zero. All of our mortgage-backed securities are issued by U.S. government-sponsored enterprises or GNMA, are highly rated by major rating agencies and have a long history of no credit losses. Other securities are comprised of State of Israel bonds denominated and paid in U.S. dollars. Israel bonds have a long history of no credit losses. Additionally, as of March 31, 2020, the State of Israel's credit rating remains "stable" among Fitch, Moody's, and S&P (A+, A1, A+). Allowance for Available-for-Sale Securities Debt securities that we intend to hold for an indefinite period of time but that may be sold in response to changes in interest rates, prepayment risk, liquidity needs, or other factors are classified as available-for-sale and reported at fair value. Realized gains and losses resulting from sales of securities using the specific identification method are included in “other income” on the income statement. Unrealized gains and losses (net of income taxes) are recorded in equity as a component of AOCI. For available-for-sale securities in an unrealized loss position, we first assess whether we intend to sell, or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis. If either of these criteria regarding intent or requirement to sell is met, the security's amortized cost basis is written down to fair value in “other income” on the income statement. For debt securities that do not meet the aforementioned criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, nature of the security, the underlying collateral, and the financial condition of the issuer, among other factors. If this assessment indicates a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for available-for-sale securities is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for available-for-sale securities is recognized in other comprehensive income. Changes in the allowance for available-for-sale securities are recorded as provision for (or reversal of) credit loss. Losses are charged against the allowance for available-for-sale securities when management believes the uncollectibility of an available-for-sale security is confirmed or when either criteria regarding intent or requirement to sell is met. Loans Accrued interest on loans is included in "other assets" on the balance sheet and is excluded from the calculation of the allowance for credit losses due to our charge-off policy to reverse accrued interest on nonperforming loans against interest income in a timely manner. Expected credit losses on net investments in leases, including any unguaranteed residual asset, are included in the ALLL. Purchased Credit Deteriorated (PCD) Loans In addition to originating loans, we also acquire loans through portfolio purchases or acquisitions of other financial services companies. Purchased loans that have evidence of more than insignificant credit deterioration since origination are deemed PCD loans. In accordance with ASC 326, we did not reassess whether recognized purchased credit impaired loans met the criteria of a PCD loan as of the date of adoption. PCD loans are initially recorded at fair value along with an allowance for credit losses determined using the same methodology as originated loans. The sum of the loan's purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through provision for credit losses. Nonperforming Loans Nonperforming loans are loans for which we do not accrue interest income, and include commercial and consumer loans and leases, as well as current year TDRs and nonaccruing TDR loans from prior years. Nonperforming loans do not include loans held for sale. Once a loan is designated nonaccrual, the interest accrued but not collected is reversed against interest income, and payments subsequently received are applied to principal until qualifying for return to accrual. Allowance for Loan and Lease Losses We estimate the ALLL using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. The ALLL is measured on a collective (pool) basis when similar risk characteristics exist. Our portfolio segments include commercial and consumer. Each of these two segments comprises multiple loan classes. Classes are characterized by similarities in initial measurement, risk attributes, and the manner in which we monitor and assess credit risk. The commercial segment is composed of commercial and industrial, commercial real estate, and commercial lease financing loan classes. The consumer lending segment is composed of residential mortgage, home equity, consumer direct, credit card, and consumer indirect loan classes. The ALLL represents our current estimate of lifetime credit losses inherent in our loan portfolio at the balance sheet date. In determining the ALLL, we estimate expected future losses for the loan's entire contractual term adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications. The ALLL is the sum of three components: (i) asset specific/ individual loan reserves; (ii) quantitative (formulaic or pooled) reserves; and (iii) qualitative (judgmental) reserves. Asset Specific / Individual Component Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not included in the collective evaluation. We have elected to apply the practical expedient to measure expected credit losses of a collateral dependent asset using the fair value of the collateral, less any costs to sell, when foreclosure is not probable, when repayment of the loan is expected to be provided substantially through the operation or sale of the collateral, and the borrower is experiencing financial difficulty. Individual reserves are determined as follows: • For commercial non-accruing loans greater than or equal to a defined dollar threshold, individual reserves are determined based on an analysis of the present value of the loan's expected future cash flows, the loan's observable market value, or the fair value of the collateral less costs to sell. • For commercial non-accruing loans below the defined dollar threshold, an established LGD percentage is multiplied by the loan balance and the results are aggregated for purposes of measuring specific reserve impairment. • The population of individually assessed consumer loans includes loans deemed collateral dependent, in addition to all TDRs. The expected loss for these loans is estimated based on the present value of the loan's expected future cash flows, except in instances where the loan is collateral dependent, in which case the loan is written down based on the collateral's fair market value less costs to sell. Quantitative Component We use a non-DCF factor-based approach to estimate expected credit losses that include component PD/LGD/EAD models as well as less complex estimation methods for smaller loan portfolios. • PD: This component model is used to estimate the likelihood that a borrower will cease making payments as agreed. The major contributors to this are the borrower credit attributes and macro-economic trends. The objective of the PD model is to produce default likelihood forecasts based on the observed loan-level information and projected paths of macroeconomic variables. • LGD: This component model is used to estimate the loss on a loan once a loan is in default. • EAD: Estimates the loan balance at the time the borrower stops making payments. For all term loans, an amortization based formulaic approach is used for account level EAD estimates. We calculate EAD using a portfolio specific method in each of our revolving product portfolios. For line products that are unconditionally cancellable, the balances will either use a paydown curve or be held flat through the life of the loan. Additional information about the critical estimates and judgments we make in developing these models is provided in the section “Allowance for loan and lease losses” under the heading” Critical Accounting Policies and Estimates” in Item 2 of this report. Qualitative Component The ALLL also includes identified qualitative factors related to idiosyncratic risk factors, changes in current economic conditions that may not be reflected in quantitatively derived results, and other relevant factors to ensure the ALLL reflects our best estimate of current expected credit losses. While our reserve methodologies strive to reflect all relevant risk factors, there continues to be uncertainty associated with, but not limited to, potential imprecision in the estimation process due to the inherent time lag of obtaining information and normal variations between estimates and actual outcomes. We provide additional reserves that are designed to provide coverage for losses attributable to such risks. The ALLL also includes factors that may not be directly measured in the determination of individual or collective reserves. Such qualitative factors may include: • The nature and volume of the institution’s financial assets; • The existence, growth, and effect of any concentrations of credit; • The volume and severity of past due financial assets, the volume of nonaccrual assets, and the volume and severity of adversely classified or graded assets; • The value of the underlying collateral for loans that are not collateral dependent; • The institution’s lending policies and procedures, including changes in underwriting standards and practices for collections, write-offs, and recoveries; • The quality of the institution’s credit review function; • The experience, ability, and depth of the institution’s lending, investment, collection, and other relevant management and staff; • The effect of other external factors such as the regulatory, legal and technological environments; competition; and events such as natural disasters; and • Actual and expected changes in international, national, regional, and local economic and business conditions and developments in which the institution operates that affect the collectability of financial assets. Liability for Credit Losses on Lending-Related Commitments The liability for credit losses on lending-related commitments, such as letters of credit and unfunded loan commitments, is included in “accrued expense and other liabilities” on the balance sheet. Expected credit losses are estimated over the contractual period in which we are exposed to credit risk via a contractual obligation unless that obligation is unconditionally cancellable by us. The liability for credit losses on lending-related commitments is adjusted as a provision for credit losses. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated useful life. Consistent with our estimation process on our loan and lease portfolio, we use a non-DCF factor-based approach to estimate expected credit losses that include component PD/LGD/EAD models as well as less complex estimation methods for smaller portfolios. Simplifying the Test for Goodwill Impairment (ASU 2017-04) On January 1, 2020, we adopted ASU 2017-04. The ASU amends ASC Topic 350, Intangibles - Goodwill and Other and eliminates the second step of the test for goodwill impairment. Under the new guidance, Key will compare the fair value of a reporting unit with its carrying amount. If the carrying amount exceeds the reporting unit’s fair value, we are required to recognize an impairment charge for this amount. The new method applies to all reporting units and the performance of a qualitative assessment is still allowable. We will monitor for impairment indicators and conduct our annual goodwill test as of October 1, 2020. The adoption of this accounting guidance must be applied prospectively and is not currently expected to have a material effect on our financial condition or results of operations. Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting (ASU 2020-04) This quarter we adopted ASU 2020-04 upon issuance. The amendments provide optional expedients and exceptions for certain contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of rate reform. The guidance is effective from the date of issuance until December 31, 2022. The guidance permits Key not to apply modification accounting or remeasure lease payments in lease contracts if the changes to the contract are related to the discontinuation of the reference rate. If certain criteria are met, the amendments also allow exceptions to the dedesignation criteria of the hedging relationship and the assessment of hedge effectiveness during the transition period. It also allows Key to make a one time election to sell, transfer, or both sell and transfer debt securities classified as held to maturity that reference a rate affected by reference rate reform and that are classified as held to maturity before January 1, 2020. This one time election may be made at any time after March 12, 2020, but no later than December 31, 2022. Key has not yet made a determination on whether it will make this election. At the time of adoption, the guidance did not have a significant impact on Key’s financial condition and results of operations. We will continue to assess the impact as the reference rate transition occurs over the next two years.

Earnings Per Common Share

Earnings Per Common Share	3 Months Ended
	Mar. 31, 2020
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 2020 2019 EARNINGS Income (loss) from continuing operations $ 145 $ 406 Less: Net income (loss) attributable to noncontrolling interests — — Income (loss) from continuing operations attributable to Key 145 406 Less: Dividends on Preferred Stock 27 20 Income (loss) from continuing operations attributable to Key common shareholders 118 386 Income (loss) from discontinued operations, net of taxes 1 1 Net income (loss) attributable to Key common shareholders $ 119 $ 387 WEIGHTED-AVERAGE COMMON SHARES Weighted-average Common Shares outstanding (000) 967,446 1,006,717 Effect of Common Share options and other stock awards 8,664 9,787 Weighted-average Common Shares and potential Common Shares outstanding (000) (a) 976,110 1,016,504 EARNINGS PER COMMON SHARE Income (loss) from continuing operations attributable to Key common shareholders $ .12 $ .38 Income (loss) from discontinued operations, net of taxes — — Net income (loss) attributable to Key common shareholders (b) .12 .38 Income (loss) from continuing operations attributable to Key common shareholders — assuming dilution $ .12 $ .38 Income (loss) from discontinued operations, net of taxes — assuming dilution — — Net income (loss) attributable to Key common shareholders — assuming dilution (b) .12 .38 (a) Assumes conversion of Common Share options and other stock awards and/or convertible preferred stock, as applicable. (b) EPS may not foot due to rounding.

Loan Portfolio

Loan Portfolio	3 Months Ended
	Mar. 31, 2020
Loans Receivables [Abstract]
Loan Portfolio	3. Loan Portfolio Loan Portfolio by Portfolio Segment and Financing Receivable (a) in millions March 31, 2020 December 31, 2019 Commercial and industrial (b) $ 55,983 $ 48,295 Commercial real estate: Commercial mortgage 13,548 13,491 Construction 1,710 1,558 Total commercial real estate loans 15,258 15,049 Commercial lease financing (c) 4,677 4,688 Total commercial loans 75,918 68,032 Residential — prime loans: Real estate — residential mortgage 7,498 7,023 Home equity loans 10,103 10,274 Total residential — prime loans 17,601 17,297 Consumer direct loans 3,833 3,513 Credit cards 1,041 1,130 Consumer indirect loans 4,805 4,674 Total consumer loans 27,280 26,614 Total loans (d) $ 103,198 $ 94,646 (a) Accrued interest of $241 million and $244 million at March 31, 2020 , and December 31, 2019 , respectively, presented in "other assets" on the Consolidated Balance Sheets is excluded from the amortized cost basis disclosed in this table. (b) Loan balances include $143 million and $144 million of commercial credit card balances at March 31, 2020 , and December 31, 2019 , respectively. (c) Commercial lease financing includes receivables held as collateral for a secured borrowing of $14 million and $15 million at March 31, 2020 , and December 31, 2019 , 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 20 (“ Long-Term Debt ”) beginning on page 163 of our 2019 Form 10-K. (d) Total loans exclude loans of $821 million at March 31, 2020 , and $865 million at December 31, 2019

Asset Quality

Asset Quality	3 Months Ended
	Mar. 31, 2020
Credit Loss [Abstract]
Asset Quality	4. Asset Quality ALLL We estimate the appropriate level of the ALLL on at least a quarterly basis. The methodology is described in Note 1 (" Basis of Presentation and Accounting Policies ") under the heading "Allowance for Loan and Lease Losses" of this report. The ALLL at March 31, 2020 represents our current estimate of lifetime 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, 2020 : in millions January 1, 2020 Provision Charge-offs Recoveries March 31, 2020 Commercial and Industrial $ 410 $ 187 $ (60 ) $ 5 $ 542 Commercial real estate: Real estate — commercial mortgage 159 50 (3 ) 1 207 Real estate — construction 15 10 — — 25 Total commercial real estate loans 174 60 (3 ) 1 232 Commercial lease financing 43 3 (2 ) — 44 Total commercial loans 627 250 (65 ) 6 818 Real estate — residential mortgage 84 5 — — 89 Home equity loans 178 8 (4 ) 2 184 Consumer direct loans 97 29 (12 ) 2 116 Credit cards 82 31 (11 ) 2 104 Consumer indirect loans 36 16 (9 ) 5 48 Total consumer loans 477 89 (36 ) 11 541 Total ALLL — continuing operations 1,104 339 (a) (101 ) 17 1,359 Discontinued operations 41 3 (2 ) 1 43 Total ALLL — including discontinued operations $ 1,145 $ 342 $ (103 ) $ 18 $ 1,402 (a) Excludes a provision for losses on lending-related commitments of $20 million . As described in Note 1 (" Basis of Presentation and Accounting Policies "), we estimate the ALLL using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. In our estimation of expected credit losses, we use a two year reasonable and supportable period across all products. Following this two year period in which supportable forecasts can be generated, for all modeled loan portfolios, we revert expected credit losses to a level that is consistent with our historical information by reverting the macroeconomic variables (model inputs) to their long run average. We revert to historical loss rates for less complex estimation methods for smaller portfolios. A 20 year fixed length look back period is used to calculate the long run average of the macroeconomic variables. A four quarter reversion period is used where the macroeconomic variables linearly revert to their long run average following the two year reasonable and supportable period. We develop our reasonable and supportable forecasts using relevant data including, but not limited to, changes in economic output, unemployment rates, property values, and other factors associated with the credit losses on financial assets. Some macroeconomic variables apply to all portfolio segments, while others are more portfolio specific. The following table discloses the most significant macroeconomic variables to each loan portfolio. Segment Portfolio Significant Macroeconomic Variables (a) Commercial Commercial and industrial BBB corporate bond rate (spread), GDP, industrial production, and unemployment rate Commercial real estate BBB corporate bond rate (spread), property and real estate price indices, and unemployment rate Commercial lease financing BBB corporate bond rate (spread), GDP, and unemployment rate Consumer Real estate — residential mortgage GDP, home price index, unemployment rate, and 30 year mortgage rate Home equity Home price index, unemployment rate, and 30 year mortgage rate Consumer direct Unemployment rate and U.S. household income Consumer indirect New vehicle sales and unemployment rate Credit cards Unemployment rate and U.S. household income Discontinued operations Unemployment rate (a) Variables include all transformations and interactions with other risk drivers. Additionally, variables may have varying impacts at different points in the economic cycle. In addition to macroeconomic drivers, portfolio attributes such as remaining term, outstanding balance, risk ratings, FICO, and delinquency also drive ALLL changes. Our ALLL models were designed to capture the correlation between economic and portfolio changes. As such, evaluating shifts in individual portfolio attributes and macroeconomic variables in isolation may not be indicative of past or future performance. Economic Outlook As of March 31, 2020 , the COVID-19 pandemic has created unprecedented economic stress and uncertainty in the US and globally. We used a third-party economic forecast updated in March 2020 to estimate our expected credit losses as of March 31, 2020. This forecast considered the global pandemic impact as well as the United States' monetary and fiscal response and we determined such forecast to be a reasonable view of the outlook for the global economy given the available information at current quarter ended. The scenario includes a notable economic slowdown over the next two years in markets in which we operate. GDP is expected to decline significantly during 2Q20, recovering in late 2020. The unemployment rate remains elevated over the next year, starting a steady improvement in the second half of 2021. As of quarter-end, many sectors of the economy have essentially shut down, consumer spending has slowed, unemployment claims have increased, and there has been a decline in oil prices. However, the monetary and fiscal policy response, including the CARES Act, is intended to assist both consumers and businesses. While cognizant of potentially more adverse economic outlooks, we also considered that the government’s stimulus efforts and programs instituted by the Federal Reserve will partially offset the economic contraction and, as such, the scenario selected reasonably captured the ultimate expected loss experience for our portfolio as of March 31, 2020 . To the extent we identified incremental credit risk that was not captured by the third party economic forecast, we addressed the risk through qualitative adjustments. As a result of the unprecedented economic uncertainty caused by the COVID-19 pandemic, our future loss estimates may vary considerably as a result of changes in the economy from our March 31, 2020 assumptions as well as the magnitude of the pandemic and impact of the United States' monetary and fiscal response becomes more defined. Commercial Segment The ALLL from continuing operations for the commercial segment increased by $191 million , or 30.5% , from January 1, 2020. The overall increase in the allowance is driven by 1) updated economic forecasts that capture expected deterioration triggered by the global COVID-19 pandemic, 2) the negative impact on our oil & gas portfolio due to commodity price declines, and 3) significant portfolio growth within pass rated credits. The primary economic forecast drivers in the current environment are the unemployment rate, which impacts all commercial portfolios, and real estate price indices, which predominately impact our commercial real estate portfolio. While oil & gas price forecasts are included as economic variables in our commercial and industrial portfolio, we performed a detailed review of our oil & gas portfolio and applied additional incremental reserves to address the recent decline in oil & gas prices. From January 1, 2020 to March 31, 2020, commercial loans grew by $7.9 billion , or 11.6% , with the substantial growth primarily concentrated in pass rated credits. Additional portfolio drivers include risk ratings and remaining term, which remained relatively flat quarter-over-quarter across product types. Consumer Segment The ALLL from continuing operations for the consumer segment increased by $64 million , or 13.4% , from January 1, 2020. The overall increase in the allowance is driven by updated economic forecasts that capture expected deterioration triggered by the global COVID-19 pandemic. The main driver in the economic forecast is the notable increase in unemployment levels, which is most impactful for our credit card portfolio. Deterioration in the HPI outlook is also contributing to the ALLL increase for the residential mortgage and home equity books. Incremental credit risk considerations as a result of the pandemic, which may not be captured by the updated economic forecasts, are addressed through qualitative adjustments. As it relates to changes in the ALLL due to portfolio factors, minimal shifts are largely driven by targeted portfolio growth across several segments and ongoing portfolio seasoning activity. 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 . Credit Risk Profile 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. The internal risk grades assigned to loans follow our definitions of Pass and Criticized, which are consistent with published definitions of regulatory risk classifications. Loans with a pass rating represent those loans not classified on our rating scale for problem credits, as minimal credit risk has been identified. Criticized loans are those loans that either have a potential weakness deserving management's close attention or have a well-defined weakness that may put full collection of contractual cash flows at risk. 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 tables below at the dates indicated. Most extensions of credit are subject to loan grading or scoring. Loan grades are assigned at the time of origination, verified by credit risk management, and periodically re-evaluated thereafter. This risk rating methodology blends our judgment with quantitative modeling. Commercial loans generally are assigned two internal risk ratings. The first rating reflects the probability that the borrower will default on an obligation; the second rating reflects expected recovery rates on the credit facility. Default probability is determined based on, among other factors, the financial strength of the borrower, an assessment of the borrower’s management, the borrower’s competitive position within its industry sector, and our view of industry risk in the context of the general economic outlook. Types of exposure, transaction structure, and collateral, including credit risk mitigants, affect the expected recovery assessment. Commercial Credit Exposure Credit Risk Profile by Creditworthiness Category and Vintage (a) As of March 31, 2020 Term Loans Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Amortized Cost Basis by Origination Year and Internal Risk Rating in millions 2019 2018 2017 2016 2015 Prior Total Commercial and Industrial Risk Rating: Pass $ 3,137 $ 7,197 $ 5,497 $ 3,517 $ 2,541 $ 3,947 $ 28,058 $ 145 $ 54,039 Criticized (Accruing) 6 56 129 177 110 169 1,004 16 1,667 Criticized (Nonaccruing) — 25 16 36 8 62 126 4 277 Total commercial and industrial 3,143 7,278 5,642 3,730 2,659 4,178 29,188 165 55,983 Real estate — commercial mortgage Risk Rating: Pass 726 3,346 2,074 1,067 1,011 3,774 1,089 42 13,129 Criticized (Accruing) — 6 21 51 40 205 7 2 332 Criticized (Nonaccruing) — — 1 3 1 77 4 1 87 Total real estate — commercial mortgage 726 3,352 2,096 1,121 1,052 4,056 1,100 45 13,548 Real estate — construction Risk Rating: Pass 36 509 703 326 69 21 14 3 1,681 Criticized (Accruing) — — — — 23 3 1 — 27 Criticized (Nonaccruing) — — — — 2 — — 2 Total real estate — construction 36 509 703 326 92 26 15 3 1,710 Commercial lease financing Risk Rating: Pass 313 1,348 763 697 345 1,162 — — 4,628 Criticized (Accruing) — 2 6 12 12 12 — — 44 Criticized (Nonaccruing) — — 1 1 3 — — — 5 Total commercial lease financing 313 1,350 770 710 360 1,174 — 4,677 Total commercial loans $ 4,218 $ 12,489 $ 9,211 $ 5,887 $ 4,163 $ 9,434 $ 30,303 $ 213 $ 75,918 (a) Accrued interest of $142 million , presented in Other Assets on the Consolidated Balance Sheets, was excluded from the amortized cost basis disclosed in this table. Consumer Credit Exposure Credit Risk Profile by FICO Score and Vintage (a) As of March 31, 2020 Term Loans Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Amortized Cost Basis by Origination Year and FICO Score in millions 2019 2018 2017 2016 2015 Prior Total Real estate — residential mortgage FICO Score: 750 and above $ 648 $ 1,923 $ 344 $ 368 $ 686 $ 1,662 — — $ 5,631 660 to 749 166 525 123 76 127 431 — — 1,448 Less than 660 5 36 28 12 33 223 — — 337 No Score — 4 3 7 5 63 — — 82 Total real estate — residential mortgage 819 2,488 498 463 851 2,379 — — 7,498 Home equity loans FICO Score: 750 and above 168 475 208 231 219 972 $ 2,898 $ 444 5,615 660 to 749 58 296 142 154 128 476 1,902 228 3,384 Less than 660 5 57 41 34 38 186 648 71 1,080 No Score 5 3 1 1 — 3 8 3 24 Total home equity loans 236 831 392 420 385 1,637 5,456 746 10,103 Consumer direct loans FICO Score: 750 and above 359 1,283 157 48 26 74 137 — 2,084 660 to 749 111 429 117 38 23 44 304 — 1,066 Less than 660 3 47 31 13 7 14 113 — 228 No Score 170 67 30 23 17 15 133 — 455 Total consumer direct loans 643 1,826 335 122 73 147 687 — 3,833 Credit cards FICO Score: 750 and above — — — — — — 459 — 459 660 to 749 — — — — — — 459 — 459 Less than 660 — — — — — — 122 — 122 No Score — — — — — — 1 — 1 Total credit cards — — — — — — 1,041 — 1,041 Consumer indirect loans FICO Score: 750 and above 383 1,066 476 278 124 114 — — 2,441 660 to 749 206 816 351 165 70 91 — — 1,699 Less than 660 38 259 154 89 47 48 — — 635 No Score 28 1 — — — 1 — — 30 Total consumer indirect loans 655 2,142 981 532 241 254 — — 4,805 Total consumer loans $ 2,353 $ 7,287 $ 2,206 $ 1,537 $ 1,550 $ 4,417 $ 7,184 $ 746 $ 27,280 (a) Accrued interest of $99 million , presented in Other Assets on the Consolidated Balance Sheets, was excluded from the amortized cost basis disclosed in this table. 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 ” Basis of Presentation and Accounting Policies ”) and Note 1 (“ Summary of Significant Accounting Policies ”) under the heading “Nonperforming Loans” beginning on page 101 of our 2019 Form 10-K. The following aging analysis of past due and current loans as of March 31, 2020 , and December 31, 2019 , provides further information regarding Key’s credit exposure. Aging Analysis of Loan Portfolio (a) March 31, 2020 Current 30-59 Days Past Due (b) 60-89 Days Past Due (b) 90 and Greater Days Past Due (b) Non-performing Loans (c) Total Past Due and Non-performing Loans (c) Total Loans (d) in millions LOAN TYPE Commercial and industrial $ 55,455 $ 100 $ 78 $ 73 $ 277 $ 528 $ 55,983 Commercial real estate: Commercial mortgage 13,381 28 34 18 87 167 13,548 Construction 1,702 4 — 2 2 8 1,710 Total commercial real estate loans 15,083 32 34 20 89 175 15,258 Commercial lease financing 4,644 14 5 9 5 33 4,677 Total commercial loans $ 75,182 $ 146 $ 117 $ 102 $ 371 $ 736 $ 75,918 Real estate — residential mortgage $ 7,397 $ 10 $ 2 $ — $ 89 $ 101 $ 7,498 Home equity loans 9,910 34 11 5 143 193 10,103 Consumer direct loans 3,801 17 4 7 4 32 3,833 Credit cards 1,015 7 5 11 3 26 1,041 Consumer indirect loans 4,740 32 8 3 22 65 4,805 Total consumer loans $ 26,863 $ 100 $ 30 $ 26 $ 261 $ 417 $ 27,280 Total loans $ 102,045 $ 246 $ 147 $ 128 $ 632 $ 1,153 $ 103,198 (a) Amounts in table represent amortized cost and exclude loans held for sale. (b) Accrued interest of $241 million presented in “other assets” on the Consolidated Balance Sheets is excluded from the amortized cost basis disclosed in this table. (c) PCI loans meeting nonperforming criteria were historically excluded from Key's nonperforming disclosures. As a result of CECL implementation on January 1, 2020, PCI loans became PCD loans. PCD loans that met the definition of nonperforming are now included in nonperforming disclosures. (d) Net of unearned income, net of deferred fees and costs, and unamortized discounts and premiums. December 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 in millions LOAN TYPE Commercial and industrial $ 47,768 $ 110 $ 52 $ 53 $ 264 $ 479 48 $ 48,295 Commercial real estate: Commercial mortgage 13,258 8 5 13 83 109 124 13,491 Construction 1,551 3 — 1 2 6 1 1,558 Total commercial real estate loans 14,809 11 5 14 85 115 125 15,049 Commercial lease financing 4,647 22 11 2 6 41 — 4,688 Total commercial loans $ 67,224 $ 143 $ 68 $ 69 $ 355 $ 635 173 $ 68,032 Real estate — residential mortgage $ 6,705 $ 7 $ 5 $ 1 $ 48 $ 61 $ 257 $ 7,023 Home equity loans 10,071 30 10 5 145 190 13 10,274 Consumer direct loans 3,484 10 5 7 4 26 3 3,513 Credit cards 1,104 6 5 12 3 26 — 1,130 Consumer indirect loans 4,609 32 8 3 22 65 — 4,674 Total consumer loans $ 25,973 $ 85 $ 33 $ 28 $ 222 $ 368 $ 273 $ 26,614 Total loans $ 93,197 $ 228 $ 101 $ 97 $ 577 $ 1,003 $ 446 $ 94,646 (a) Amounts in table represent recorded investment and exclude loans held for sale. Recorded investment represents the principal amount of the loan increased or decreased by 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. At March 31, 2020 , the approximate carrying amount of our commercial nonperforming loans outstanding represented 75% of their original contractual amount owed, total nonperforming loans outstanding represented 78% of their original contractual amount owed, and nonperforming assets in total were carried at 87% of their original contractual amount owed. Nonperforming loans reduced expected interest income by $6 million for the three months ended March 31, 2020 , and $8 million , for the three months ended March 31, 2019 . The amortized cost basis of nonperforming loans on nonaccrual status for which there is no related allowance for credit losses was $407 million at March 31, 2020 . Collateral-dependent Financial Assets We classify financial assets as collateral-dependent when our borrower is experiencing financial difficulty, and we expect repayment to be provided substantially through the operation or sale of the collateral. Our commercial loans have collateral that includes commercial machinery, commercial properties, and commercial real estate construction projects. Our consumer loans have collateral that includes residential real estate, automobiles, boats, and RVs. There were no significant changes in the extent to which collateral secures our collateral-dependent financial assets during the three months ended March 31, 2020 . 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. Our loan modifications are handled on a case-by-case basis and are negotiated to achieve mutually agreeable terms that maximize loan collectability and meet the borrower’s financial needs. The CARES Act and certain regulatory agencies recently issued guidance stating certain loan modifications to borrowers experiencing financial distress as a result of the economic impacts created by COVID-19 may not be required to be treated as TDRs under U.S GAAP. For COVID-19 related loan modifications which occurred from March 1, 2020, through March 31, 2020, and met the loan modification criteria under either the CARES Act or the criteria specified by the regulatory agencies, we elected to suspend TDR accounting for such loan modifications. Commitments outstanding to lend additional funds to borrowers whose loan terms have been modified in TDRs were $3 million and $5 million at March 31, 2020 , and December 31, 2019 , respectively. The consumer TDR other concession category in the table below primarily includes those borrowers’ debts that are discharged through Chapter 7 bankruptcy and have not been formally re-affirmed. At March 31, 2020 , and December 31, 2019 , the recorded investment of consumer residential mortgage loans in the process of foreclosure was approximately $71 million and $97 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 2020 2019 Consumer loans: Interest rate reduction $ 9 $ 4 Other 9 9 Total $ 18 $ 13 Total TDRs $ 18 $ 13 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 2020 2019 Balance at beginning of the period $ 347 $ 399 Additions 17 14 Payments (18 ) (39 ) Charge-offs (6 ) (9 ) Balance at end of period $ 340 $ 365 A further breakdown of TDRs included in nonperforming loans by loan category for the periods indicated are as follows: March 31, 2020 December 31, 2019 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 35 $ 65 $ 43 51 $ 72 $ 53 Commercial real estate: Commercial mortgage 7 64 58 6 64 58 Total commercial real estate loans 7 64 58 6 64 58 Total commercial loans 42 129 101 57 136 111 Real estate — residential mortgage 194 16 14 181 13 11 Home equity loans 625 38 37 713 42 41 Consumer direct loans 168 2 2 172 2 2 Credit cards 324 2 2 368 2 2 Consumer indirect loans 1,097 19 15 1,131 19 16 Total consumer loans 2,408 77 70 2,565 78 72 Total nonperforming TDRs 2,450 206 171 2,622 214 183 Prior-year accruing: (a) Commercial and industrial 5 30 25 6 30 25 Commercial real estate Commercial mortgage 1 1 — 1 — — Total commercial real estate loans 1 1 — 1 — — Total commercial loans 6 31 25 7 30 25 Real estate — residential mortgage 489 36 31 493 37 31 Home equity loans 1,839 110 90 1,751 104 84 Consumer direct loans 165 4 3 139 4 3 Credit cards 577 3 1 486 3 1 Consumer indirect loans 784 33 19 714 33 20 Total consumer loans 3,854 186 144 3,583 181 139 Total prior-year accruing TDRs 3,860 217 169 3,590 211 164 Total TDRs 6,310 $ 423 $ 340 6,212 $ 425 $ 347 (a) All TDRs that were restructured prior to January 1, 2020 , and January 1, 2019 , 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, 2020 , there were no commercial loan TDRs and 84 consumer loan TDRs with a combined recorded investment of $2 million that experienced payment defaults after modifications resulting in TDR status during 2019 . 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 . Liability for Credit Losses on Off Balance Sheet Exposures The liability for credit losses inherent in unfunded lending-related commitments, such as letters of credit and unfunded loan commitments, and certain financial guarantees is included in “accrued expense and other liabilities” on the balance sheet. Changes in the liability for credit losses on off balance sheet exposures are summarized as follows: Three months ended March 31, in millions 2020 2019 Balance at the end of the prior period $ 68 $ 64 Liability for credit losses on contingent guarantees at the end of the prior period 7 — Cumulative effect from change in accounting principle (a), (b) 66 — Balance at beginning of period 141 64 Provision (credit) for losses on off balance sheet exposures 20 (2 ) Balance at end of period $ 161 $ 62 (a) The cumulative effect from change in accounting principle relates to the January 1, 2020, adoption of ASU 2016-13. (b) Excludes $4 million related to the provision for other financial assets.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2020
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 2019 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, 2020 , and December 31, 2019 . March 31, 2020 December 31, 2019 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 — $ 556 — $ 556 — $ 843 — $ 843 States and political subdivisions — 19 — 19 — 30 — 30 Other mortgage-backed securities — 176 — 176 — 78 — 78 Other securities — 38 — 38 — 44 — 44 Total trading account securities — 789 — 789 — 995 — 995 Commercial loans — 6 — 6 — 45 — 45 Total trading account assets — 795 — 795 — 1,040 — 1,040 Securities available for sale: U.S. Treasury, agencies and corporations — 341 — 341 — 334 — 334 States and political subdivisions — 4 — 4 — 4 — 4 Agency residential collateralized mortgage obligations — 12,045 — 12,045 — 12,783 — 12,783 Agency residential mortgage-backed securities — 1,539 — 1,539 — 1,714 — 1,714 Agency commercial mortgage-backed securities — 6,869 — 6,869 — 6,997 — 6,997 Other securities — — $ 9 9 — — $ 11 11 Total securities available for sale — 20,798 9 20,807 — 21,832 11 21,843 Other investments: Principal investments: Direct — — 1 1 — — 1 1 Indirect (measured at NAV) (a) — — — 64 — — — 68 Total principal investments — — 1 65 — — 1 69 Equity investments: Direct — — 10 10 — — 12 12 Direct (measured at NAV) (a) — — — 1 — — — 1 Indirect (measured at NAV) (a) — — — 8 — — — 8 Total equity investments — — 10 19 — — 12 21 Total other investments — — 11 84 — — 13 90 Loans, net of unearned income (residential) — — 3 3 — — 4 4 Loans held for sale (residential) — 142 10 152 — 140 — 140 Derivative assets: Interest rate — 1,845 96 1,941 — 941 22 963 Foreign exchange 124 40 — 164 $ 49 18 — 67 Commodity — 704 — 704 — 208 — 208 Credit — 6 5 11 — — 1 1 Other — 34 23 57 — 9 5 14 Derivative assets 124 2,629 124 2,877 49 1,176 28 1,253 Netting adjustments (b) — — — (809 ) — — — (473 ) Total derivative assets 124 2,629 124 2,068 49 1,176 28 780 Accrued income and other assets — — — — — — — — Total assets on a recurring basis at fair value $ 124 $ 24,364 $ 157 $ 23,909 $ 49 $ 24,188 $ 56 $ 23,897 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions $ 124 $ 482 — $ 606 $ 19 $ 686 — $ 705 Derivative liabilities: Interest rate — 329 — 329 — 253 — 253 Foreign exchange 117 40 — 157 43 17 — 60 Commodity — 690 — 690 — 200 — 200 Credit — — $ 28 28 — 1 9 10 Other — 40 — 40 — 10 — 10 Derivative liabilities 117 1,099 28 1,244 43 481 9 533 Netting adjustments (b) — — — (595 ) — — — (335 ) Total derivative liabilities 117 1,099 28 649 43 481 9 198 Total liabilities on a recurring basis at fair value $ 241 $ 1,581 $ 28 $ 1,255 $ 62 $ 1,167 9 $ 903 (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, 2020, 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, 2020, 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, 2020 , as well as financial support provided for the three months ended March 31, 2020 , and March 31, 2019 . Financial support provided Three months ended March 31, March 31, 2020 2020 2019 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) 64 $ 20 $ — — $ 1 — Total $ 65 $ 20 — $ — $ 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, 2020 , 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 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, including: • Credit spreads and interest rates The unobservable internally derived assumptions include: • Loss given default • Internal risk assessments of customers and the remaining term of the underlying transactions The fair value represents an estimate of the amount that the risk participation counterparty would need to pay/receive as of the measurement date based on the probability of customer default on the swap transaction and the fair value of the underlying customer swap. Therefore, a higher loss probability and a lower credit rating would negatively affect the fair value of the risk participations and a lower loss probability and higher credit rating would positively affect the fair value of the risk participations. 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 measured at fair value on a recurring basis for the three months ended March 31, 2020 , and March 31, 2019 . 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, 2020 Securities available for sale Other securities $ 11 $ (2 ) — — — — — — — $ 9 — Other investments Principal investments Direct 1 — — $ — $ — — — — — 1 — Equity investments Direct 12 — (2 ) (a) — — — — $ — — 10 (2 ) (a) Loans held for sale (residential) — — — — — — $ 10 — — 10 — Loans, net of unearned income (residential) 4 — — — (1 ) — — — — 3 — Derivative instruments (b) Interest rate 22 — $ 19 (c) 11 (1 ) — — 55 (d) $ (10 ) (d) 96 — Credit (8 ) — (16 ) (c) 1 — — — — — (23 ) — Other (e) 5 — — — — — 18 — — 23 — 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 (a) 1 — — $ 1 $ (1 ) — — — — 1 — Equity investments Direct 7 — — — — — — $ 1 — 8 — Loans held for sale (residential) — — — — — — $ 1 — — 1 — Loans, net of unearned income (residential) 3 — — — — — — — — 3 — Derivative instruments (b) Interest rate 5 — $ 1 (c) — — — — 1 (d) $ (4 ) (d) 3 — Credit — — — (1 ) — $ — — — — (1 ) — Other (e) 3 — — — — — $ 1 — — 4 — (a) Realized and unrealized gains and losses on principal investments and other equity 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, 2020 , and December 31, 2019 . The following table presents our assets measured at fair value on a nonrecurring basis at March 31, 2020 , and December 31, 2019 : March 31, 2020 December 31, 2019 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 — $ — $ 33 $ 33 — — $ 76 $ 76 Accrued income and other assets — — 64 64 — 118 51 169 Total assets on a nonrecurring basis at fair value — $ — $ 97 $ 97 — 118 $ 127 $ 245 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 and student loans held for sale Through a quarterly analysis of our loan portfolios held for sale, which include both performing and nonperforming commercial loans and student 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, other repossessed personal property, and right-of-use assets (a) OREO, other repossessed properties, and right-of-use assets 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 (a) 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 benefits 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. Level 3 Mortgage Servicing Assets ( a) Refer to Note 8. Mortgage Servicing Assets Level 3 (a) Asset classes included in “Accrued income and other assets” on the Consolidated Balance Sheets Quantitative Information about Level 3 Fair Value Measurements The range and weighted-average of the significant unobservable inputs used to fair value our material Level 3 recurring and nonrecurring assets at March 31, 2020 , and December 31, 2019 , along with the valuation techniques used, are shown in the following table: Level 3 Asset (Liability) Valuation Technique Significant Unobservable Input Range (Weighted-Average) (b), (c) dollars in millions March 31, 2020 December 31, 2019 March 31, 2020 December 31, 2019 Recurring Securities available-for-sale: Other securities $ 9 $ 11 Discounted cash flows Discount rate N/A (14.82%) N/A (16.10%) Marketability discount N/A (30.00%) N/A (30.00%) Volatility factor N/A (43.00%) N/A (43.00%) Other investments: (a) Equity investments Direct 10 12 Discounted cash flows Discount rate 12.40 - 17.03% (14.75%) 13.91 - 17.24% (15.61%) Marketability discount N/A (30.00%) N/A (30.00%) Volatility factor N/A (51.00%) N/A (47.00%) Loans held for sale (residential) 10 — Market comparable pricing Comparability factor 104.15-107.01% (105.25%) N/A Loans, net of unearned income (residential) 3 4 Market comparable pricing Comparability factor 79.00-98.00% (91.07%) 79.00 - 98.00% (91.05%) Derivative instruments: Interest rate 96 22 Discounted cash flows Probability of default .02 - 100% (13.90%) .02 - 100% (5.40%) Internal risk rating 1 - 19 (9.178) 1 - 19 (9.168) Loss given default 0 - 1 (.476) 0 - 1 (.492) Credit (assets) 5 1 Discounted cash flows Probability of default .02 - 100% (13.30%) .02 - 100% (4.2%) Internal risk rating 1 - 19 (10.14) 1 - 19 (10.13) Loss given default 0 - 1 (.493) 0 - 1 (.498) Credit (liabilities) (28 ) (9 ) Discounted cash flows Probability of default .02 - 100% (25.19%) .02 - 100% (12.24%) Internal risk rating 1 - 19 (7.76) 1 - 19 (8.058) Loss given default 0 - 1 (.394) 0 - 1 (.411) Other (d) 23 5 Discounted cash flows Loan closing rates 27.34-99.31 % (74.08%) 37.71 - 99.69% (79.33%) Nonrecurring Impaired loans 33 76 Fair value of underlying collateral Discount rate 0 - 90.00% (23.00%) 0 - 60.00% (10.00%) Accrued income and other assets: OREO and other Level 3 assets (e) 2 5 Appraised value Appraised value N/M N/M (a) Principal investments, direct is excluded from this table as the balance at March 31, 2020 , and December 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. (e) Excludes $62 million and $46 million pertaining to mortgage servicing assets at March 31, 2020 and December 31, 2019 . Refer to Note 8 (“ Mortgage Servicing Assets ”) for significant unobservable inputs pertaining to these assets. 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, 2020 , and December 31, 2019 , are shown in the following tables. Assets and liabilities are further arranged by measurement category. March 31, 2020 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) $ 795 $ — $ 795 — — — $ 795 Other investments (b) 679 — — $ 606 $ 73 — 679 Loans, net of unearned income (residential) (d) 3 — — 3 — — 3 Loans held for sale (residential) (b) 152 — 142 10 — — 152 Derivative assets - trading (b) 2,008 124 2,563 124 — $ (803 ) (f) 2,008 Fair value - OCI Securities available for sale (b) 20,807 — 20,798 $ 9 — — 20,807 Derivative assets - hedging (b)(g) 60 — 66 — — (6 ) (f) 60 Amortized cost Held-to-maturity securities (c) 9,638 — 10,012 — — — 10,012 Loans, net of unearned income (d) 101,836 — — 99,535 — — 99,535 Loans held for sale (b) 1,991 — — 1,991 — — 1,991 Other Cash and short-term investments (a) 4,938 4,938 — — — — 4,938 LIABILITIES (by measurement category) Fair value - net income Derivative liabilities - trading (b) $ 649 $ 117 $ 1,096 28 — $ (592 ) (f) $ 649 Fair value - OCI Derivative liabilities - hedging (b)(g) — — 3 — — (3 ) (f) — Amortized cost Time deposits (e) 10,253 — 10,336 — — — 10,336 Short-term borrowings (a) 7,050 124 6,926 — — — 7,050 Long-term debt (e) 13,732 13,144 715 — — — 13,859 Other Deposits with no stated maturity (a) 105,051 — 105,051 — — — 105,051 December 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) $ 1,040 — $ 1,040 — — — $ 1,040 Other investments (b) 605 — — $ 528 $ 77 — 605 Loans, net of unearned income (residential) (d) 4 — — 4 — — 4 Loans held for sale (residential) (b) 140 — 140 — — — 140 Derivative assets - trading (b) 715 $ 49 985 28 — $ (347 ) (f) 715 Fair value - OCI Securities available for sale (b) 21,843 — 21,832 11 — — 21,843 Derivative assets - hedging (b)(g) 65 — 191 — — (126 ) (f) 65 Amortized cost Held-to-maturity securities (c) 10,067 — 10,116 — — — 10,116 Loans, net of unearned income (d) 93,742 — — 92,641 — — 92,641 Loans held for sale (b) 1,194 — — 1,194 — — 1,194 Other Cash and short-term investments (a) 2,004 2,004 — — — — 2,004 LIABILITIES (by measurement category) Fair value - net income Derivative liabilities - trading (b) $ 194 $ 43 $ 461 9 — $ (319 ) (f) $ 194 Fair value - OCI Derivative liabilities - hedging (b)(g) 4 — 20 — — (16 ) (f) 4 Amortized cost Time deposits (e) 11,652 — 11,752 — — — 11,752 Short-term borrowings (a) 1,092 19 1,073 — — — 1,092 Long-term debt (e) 12,448 12,694 249 — — — 12,943 Other Deposits with no stated maturity (a) 100,218 — 100,218 — — — 100,218 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 105 of our 2019 Form 10-K. DIscontin

Securities

Securities	3 Months Ended
	Mar. 31, 2020
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, 2020 December 31, 2019 in millions Amortized Cost (a) 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 $ 340 $ 1 — $ 341 $ 334 — — $ 334 States and political subdivisions 4 — — 4 4 — — 4 Agency residential collateralized mortgage obligations 11,705 342 $ 2 12,045 12,772 $ 82 $ 71 12,783 Agency residential mortgage-backed securities 1,472 67 — 1,539 1,677 41 4 1,714 Agency commercial mortgage-backed securities 6,597 277 5 6,869 6,898 139 40 6,997 Other securities 8 1 — 9 7 4 — 11 Total securities available for sale $ 20,126 $ 688 $ 7 $ 20,807 $ 21,692 $ 266 $ 115 $ 21,843 HELD-TO-MATURITY SECURITIES Agency residential collateralized mortgage obligations $ 5,354 $ 157 — $ 5,511 $ 5,692 $ 23 $ 49 $ 5,666 Agency residential mortgage-backed securities 390 19 — 409 409 6 — 415 Agency commercial mortgage-backed securities 3,868 198 — 4,066 3,940 78 9 4,009 Asset-backed securities 11 — — 11 11 — — 11 Other securities 15 — — 15 15 — — 15 Total held-to-maturity securities $ 9,638 $ 374 — $ 10,012 $ 10,067 $ 107 $ 58 $ 10,116 (a) Amortized cost amounts exclude accrued interest receivable which is recorded within “other assets” on the balance sheet. At March 31, 2020 , accrued interest receivable on available for sale securities and held-to-maturity securities totaled $42 million and $19 million , respectively. The following table summarizes available for sale securities in an unrealized loss position for which an allowance for credit losses has not been recorded as of March 31, 2020 , and December 31, 2019 . 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, 2020 Securities available for sale: Agency residential collateralized mortgage obligations $ 135 — (a) $ 416 $ 2 $ 551 $ 2 Agency residential mortgage-backed securities 10 — (a) 7 — (a) 17 — Agency commercial mortgage-backed securities 1,083 $ 5 — — 1,083 5 Other securities 1 — (a) — — 1 — Held-to-maturity securities: Agency residential collateralized mortgage obligations 8 — (a) 60 — (a) 68 — Asset-backed securities 2 — (a) — — 2 — Other securities 8 — (a) — — 8 — Total securities in an unrealized loss position $ 1,247 $ 5 $ 483 $ 2 $ 1,730 $ 7 December 31, 2019 Securities available for sale: U.S. Treasury, agencies, and corporations $ 30 — (b) $ 30 — (b) $ 60 — Agency residential collateralized mortgage obligations 3,432 $ 20 3,221 $ 51 6,653 $ 71 Agency residential mortgage-backed securities 33 — (b) 629 4 662 4 Agency commercial mortgage-backed securities 1,541 17 1,213 23 2,754 40 Held-to-maturity securities: Agency residential collateralized mortgage obligations 1,626 14 2,289 35 3,915 49 Agency residential mortgage-backed securities 56 — (b) — — 56 — Agency commercial mortgage-backed securities 518 9 — — 518 9 Asset-backed securities 11 — (b) — — 11 — Other securities 3 — (b) — — 3 — Total securities in an unrealized loss position $ 7,250 $ 60 $ 7,382 $ 113 $ 14,632 $ 173 (a) At March 31, 2020 , gross unrealized losses totaled less than $1 million for agency residential collateralized mortgage obligations, agency residential mortgage-backed securities, and other securities available for sale with a loss duration of less than 12 months. At March 31, 2020 , gross unrealized losses totaled less than $1 million for agency residential collateralized mortgage obligations, asset-backed securities, and other securities held-to-maturity with a loss duration of less than 12 months. At March 31, 2020 , gross unrealized losses totaled less than $1 million for agency residential mortgage-backed securities available for sale with a loss duration greater than 12 months or longer. At March 31, 2020 , gross unrealized losses totaled less than $1 million for agency residential collateralized mortgage obligations held-to-maturity with a loss duration greater than 12 months or longer. (b) At December 31, 2019 , gross unrealized losses totaled less than $1 million for U.S. Treasury, agencies, and corporations and agency residential mortgage-backed securities available for sale with a loss duration of less than 12 months. At December 31, 2019 , gross unrealized losses totaled less than $1 million for U.S. Treasury, Agencies, and Corporations securities available for sale with a loss duration greater than 12 months or longer. At December 31, 2019 , gross unrealized losses totaled less than $1 million for agency residential residential mortgage-backed securities, asset-backed securities, and other securities held-to-maturity with a loss duration of less than 12 months. Based on our evaluation at March 31, 2020 , under the new impairment model, an allowance for credit losses has not been recorded nor have unrealized losses been recognized into income. The issuers of the securities are of high credit quality and have a long history of no credit losses, management does not intend to sell and it is likely that management will not be required to sell the securities prior to their anticipated recovery, and the decline in fair value is largely attributed to changes in interest rates and other market conditions. The issuers continue to make timely principle and interest payments. At March 31, 2020 , securities available for sale and held-to-maturity securities totaling $8.4 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, 2020 Securities Available for Sale Held to Maturity Securities in millions Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 571 $ 577 $ 60 $ 61 Due after one through five years 14,660 15,101 6,690 6,881 Due after five through ten years 4,893 5,127 2,888 3,070 Due after ten years 2 2 — — Total $ 20,126 $ 20,807 $ 9,638 $ 10,012

Derivatives and Hedging Activit

Derivatives and Hedging Activities	3 Months Ended
	Mar. 31, 2020
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, 2020 , after taking into account the effects of bilateral collateral and master netting agreements, we had $60 million of derivative assets and less than $1 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 $2.1 billion and derivative liabilities of $649 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 105 of our 2019 Form 10-K. Our derivative strategies and related risk management objectives are described in Note 8 (“ Derivatives and Hedging Activities ”) beginning on page 134 of our 2019 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, 2020 , and December 31, 2019 . 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, 2020 December 31, 2019 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 $ 25,804 $ 66 $ 3 $ 39,208 $ 191 $ 20 Derivatives not designated as hedging instruments: Interest rate 77,335 1,875 326 71,209 772 233 Foreign exchange 6,340 164 157 6,572 67 60 Commodity 4,556 704 690 5,324 208 200 Credit 959 11 28 427 1 10 Other (a) 5,408 57 40 3,337 14 10 Total 94,598 2,811 1,241 86,869 1,062 513 Netting adjustments (b) — (809 ) (595 ) — (473 ) (335 ) Net derivatives in the balance sheet 120,402 2,068 649 126,077 780 198 Other collateral (c) — (3 ) — — (2 ) (42 ) Net derivative amounts $ 120,402 $ 2,065 $ 649 $ 126,077 $ 778 $ 156 (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, 2020 , 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, 2020 , and December 31, 2019 , related to cumulative basis adjustments for fair value hedges. March 31, 2020 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 $ 7,774 $ 533 December 31, 2019 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 $ 8,408 $ 240 (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 $9 million and $9 million at March 31, 2020 , and December 31, 2019 , respectively, Cash flow hedges. During the three -month period ended March 31, 2020 , 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, 2020 , we expect to reclassify an estimated $242 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 $86 million of net gains related to terminated cash flow hedges from AOCI to income during the next 12 months. As of March 31, 2020 , the maximum length of time over which we hedge forecasted transactions is 9 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, 2020 , and March 31, 2019 . Location and amount of net gains (losses) recognized in income on fair value and cash flow hedging relationships in millions Interest expense – long-term debt Interest income – loans Interest expense - deposits Other income Three months ended March 31, 2020 Total amounts presented in the consolidated statement of income $ (90 ) $ 1,026 $ (169 ) $ (88 ) Net gains (losses) on fair value hedging relationships Interest contracts Recognized on hedged items (294 ) — — — Recognized on derivatives designated as hedging instruments 311 — — — Net income (expense) recognized on fair value hedges $ 17 — — — Net gain (loss) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from AOCI into net income $ (1 ) $ 34 — — Net income (expense) recognized on cash flow hedges $ (1 ) $ 34 — — 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 ) — — Net investment hedges. We previously entered into foreign currency forward contracts to hedge our exposure to changes in the carrying value of our investments in foreign subsidiaries as a result of changes in the related foreign exchange rates. In December 2019, our last remaining net investment hedge was discontinued in connection with the substantial liquidation of the net assets of KEF’s Canadian subsidiary. Additional information regarding the discontinuance of this net investment hedge is provided in Note 8 ( Derivatives and Hedging Activities ) on page 137 of our 2019 Form 10-K. 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, 2020 , and March 31, 2019 , 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 Three months ended March 31, 2020 Cash Flow Hedges Interest rate $ 562 Interest income — Loans $ 34 Interest rate (5 ) Interest expense — Long-term debt (1 ) Interest rate (30 ) Investment banking and debt placement fees — Total $ 527 $ 33 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 ) 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, 2020 , and March 31, 2019 , and where they are recorded on the income statement. Three months ended March 31, 2020 Three months ended March 31, 2019 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 $ 11 — $ (9 ) $ 2 $ 8 — $ (2 ) $ 6 Foreign exchange 12 — — 12 10 — — 10 Commodity 2 — — 2 1 — — 1 Credit (16 ) — 1 (15 ) 1 — (7 ) (6 ) Other — 4 9 13 — — 1 1 Total net gains (losses) $ 9 4 $ 1 $ 14 $ 20 — $ (8 ) $ 12 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 $370 million was netted against derivative assets on the balance sheet at March 31, 2020 , compared to $207 million of cash collateral netted against derivative assets at December 31, 2019 . The cash collateral netted against derivative liabilities totaled $156 million at March 31, 2020 , and $69 million at December 31, 2019 . 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 138 of our 2019 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, 2020 December 31, 2019 Interest rate $ 1,744 $ 848 Foreign exchange 70 30 Commodity 559 95 Credit 8 — Other 57 14 Derivative assets before collateral 2,438 987 Less: Related collateral 370 207 Total derivative assets $ 2,068 $ 780 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. These types of transactions are primarily high dollar volume. We enter into bilateral collateral and master netting agreements with these counterparties. We clear certain types of derivative transactions with these counterparties, whereby central clearing organizations become the counterparties to our derivative contracts. In addition, we enter into derivative contracts through swap execution facilities. Swap clearing and swap execution facilities reduce our exposure to counterparty credit risk. At March 31, 2020 , we had gross exposure of $966 million to broker-dealers and banks. We had net exposure of $327 million after the application of master netting agreements and cash collateral, where such qualifying agreements exist. We had net exposure of $323 million after considering $4 million of additional collateral held in the form of securities. We enter into transactions using master netting agreements with clients to accommodate their business needs. In most cases, we mitigate our credit exposure by cross-collateralizing these transactions to the underlying loan collateral. For transactions that are not clearable, we mitigate our market risk by buying and selling U.S. Treasuries and Eurodollar futures or entering into offsetting positions. Due to the cross-collateralization to the underlying loan, we typically do not exchange cash or marketable securities collateral in connection with these transactions. To address the risk of default associated with these contracts, we have established a CVA reserve (included in “accrued income and other assets”) in the amount of $86 million at March 31, 2020 . The CVA is calculated from potential future exposures, expected recovery rates, and market-implied probabilities of default. At March 31, 2020 , we had gross exposure of $1.9 billion 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 $1.7 billion 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 $17 million as of March 31, 2020 , and $9 million as of December 31, 2019 . 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 139 of our 2019 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, 2020 , and December 31, 2019 . The notional amount represents the amount that the seller could be required to pay. The payment/performance risk shown in the table represents a weighted average of the default probabilities for all reference entities in the respective portfolios. These default probabilities are implied from observed credit indices in the credit default swap market, which are mapped to reference entities based on Key’s internal risk rating. March 31, 2020 December 31, 2019 dollars in millions Notional Amount Average Term (Years) Payment / Performance Risk Notional Amount Average Term (Years) Payment / Performance Risk Other $ 358 14.62 27.09 % $ 134 14.30 14.56 % Total credit derivatives sold $ 358 — — $ 134 — — 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, 2020 , 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, 2020 , 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 $106 million , which was comprised of $61 million in derivative assets and $167 million in derivative liabilities. We had $101 million in cash and securities collateral posted to cover those positions as of March 31, 2020 . There were no derivative contracts with credit risk contingent features held by KeyCorp at March 31, 2020 . 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, 2020 , and December 31, 2019 . 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, 2020 , and December 31, 2019 , 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, 2020 , and December 31, 2019 . 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, 2020 December 31, 2019 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 $ 1 $ 1 $ 1 $ 1 Two rating downgrades 1 1 1 1 Three rating downgrades 1 1 1 1 KeyBank’s long-term senior unsecured credit rating was four ratings above noninvestment grade at Moody’s and S&P as of March 31, 2020 , and December 31, 2019 . If KeyBank’s ratings had been downgraded below investment grade as of March 31, 2020 , or December 31, 2019 , payments of $3 million and $3 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, 2020 , or December 31, 2019 , no payments would have been required to either terminate the contracts or post additional collateral for those contracts in a net liability position, taking into account all collateral already posted.

Mortgage Servicing Assets

Mortgage Servicing Assets	3 Months Ended
	Mar. 31, 2020
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 2019 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 2020 2019 Balance at beginning of period $ 539 $ 502 Servicing retained from loan sales 24 18 Purchases 11 6 Amortization (29 ) (29 ) Temporary impairments (2 ) — Balance at end of period $ 543 $ 497 Fair value at end of period $ 655 $ 727 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, 2020 , and March 31, 2019 , along with the valuation techniques, are shown in the following table: dollars in millions March 31, 2020 March 31, 2019 Valuation Technique Significant Unobservable Input Range (Weighted Average) Discounted cash flow Expected defaults 0.97 - 2.00% (1.14%) 1.00 - 2.00% (1.14%) Residual cash flows discount rate 7.00 - 11.42% (9.24%) 7.00 - 15.00% (9.19%) Escrow earn rate 1.20 - 1.92% (1.67%) 2.22 - 3.70% (2.98%) Loan assumption rate 0.01 - 3.37% (1.32%) 0.00 - 3.18% (1.39%) 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 $50 million for the three-month period ended March 31, 2020 , and $46 million for the three-month period ended March 31, 2019 . This fee income was offset by $32 million of amortization for the three-month period ended March 31, 2020 , and $29 million for the three-month period ended March 31, 2019 . Both the contractual fee income and the amortization are recorded, net, in “commercial 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 2020 2019 Balance at beginning of period $ 46 $ 37 Servicing retained from loan sales 5 2 Purchases — — Amortization (2 ) (1 ) Temporary impairments (9 ) — Balance at end of period $ 40 $ 38 Fair value at end of period $ 41 $ 50 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, 2020 , and March 31, 2019 , along with the valuation techniques, are shown in the following table: dollars in millions March 31, 2020 March 31, 2019 Valuation Technique Significant Unobservable Input Range (Weighted Average) Discounted cash flow Prepayment speed 10.50 - 55.60% (17.16%) 9.32 - 58.76% (9.93%) Discount rate 7.50 - 8.50% (7.52%) 7.50 - 10.00% (7.54%) Servicing cost $62 - $8,375 ($68.14) $62 - $4,375 ($68.23) 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, 2020 , 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 $6 million for the three-month period ended March 31, 2020 , and $4 million for the three-month period ended March 31, 2019 . This fee income was offset by $2 million of amortization for the three-month period ended March 31, 2020 , and $1 million for the three-month period ended March 31, 2019 . Both the contractual fee income and the amortization are recorded, net, in “consumer mortgage income” on the income statement.

Leases

Leases	3 Months Ended
	Mar. 31, 2020
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. For more information on our leasing activity, see Note 10 (“Leases”) beginning on page 143 of our 2019 Form 10-K 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 income statement. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2020 2019 Sales-type and direct financing leases Interest income on lease receivable $ 28 $ 30 Interest income related to accretion of unguaranteed residual asset 3 3 Interest income on deferred fees and costs — — Total sales-type and direct financing lease income 31 33 Operating leases Operating lease income related to lease payments 34 33 Other operating leasing gains (4 ) 4 Total operating lease income and other leasing gains 30 37 Total lease income $ 61 $ 70
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. For more information on our leasing activity, see Note 10 (“Leases”) beginning on page 143 of our 2019 Form 10-K 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 income statement. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2020 2019 Sales-type and direct financing leases Interest income on lease receivable $ 28 $ 30 Interest income related to accretion of unguaranteed residual asset 3 3 Interest income on deferred fees and costs — — Total sales-type and direct financing lease income 31 33 Operating leases Operating lease income related to lease payments 34 33 Other operating leasing gains (4 ) 4 Total operating lease income and other leasing gains 30 37 Total lease income $ 61 $ 70
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. For more information on our leasing activity, see Note 10 (“Leases”) beginning on page 143 of our 2019 Form 10-K 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 income statement. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2020 2019 Sales-type and direct financing leases Interest income on lease receivable $ 28 $ 30 Interest income related to accretion of unguaranteed residual asset 3 3 Interest income on deferred fees and costs — — Total sales-type and direct financing lease income 31 33 Operating leases Operating lease income related to lease payments 34 33 Other operating leasing gains (4 ) 4 Total operating lease income and other leasing gains 30 37 Total lease income $ 61 $ 70
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. For more information on our leasing activity, see Note 10 (“Leases”) beginning on page 143 of our 2019 Form 10-K 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 income statement. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2020 2019 Sales-type and direct financing leases Interest income on lease receivable $ 28 $ 30 Interest income related to accretion of unguaranteed residual asset 3 3 Interest income on deferred fees and costs — — Total sales-type and direct financing lease income 31 33 Operating leases Operating lease income related to lease payments 34 33 Other operating leasing gains (4 ) 4 Total operating lease income and other leasing gains 30 37 Total lease income $ 61 $ 70
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. For more information on our leasing activity, see Note 10 (“Leases”) beginning on page 143 of our 2019 Form 10-K 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 income statement. The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2020 2019 Sales-type and direct financing leases Interest income on lease receivable $ 28 $ 30 Interest income related to accretion of unguaranteed residual asset 3 3 Interest income on deferred fees and costs — — Total sales-type and direct financing lease income 31 33 Operating leases Operating lease income related to lease payments 34 33 Other operating leasing gains (4 ) 4 Total operating lease income and other leasing gains 30 37 Total lease income $ 61 $ 70

Variable Interest Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2020
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 13 (“ Variable Interest Entities “) beginning on page 146 of our 2019 Form 10-K. LIHTC investments. We had $1.4 billion and $1.5 billion of investments in LIHTC operating partnerships at March 31, 2020 , and December 31, 2019 , 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, 2020 , and December 31, 2019 , we had liabilities of $504 million and $546 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, 2020 , and December 31, 2019 . 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 13 (“ Variable Interest Entities ”) beginning on page 146 of our 2019 Form 10-K. Unconsolidated VIEs in millions Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2020 LIHTC investments $ 6,401 $ 2,534 $ 1,823 December 31, 2019 LIHTC investments $ 6,405 $ 2,526 $ 1,846 We amortize our LIHTC investments over the period that we expect to receive the tax benefits. During the first three months of 2020 , we recognized $49 million of amortization and $46 million of tax credits associated with these investments within “income taxes” on our income statement. 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. 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 $64 million and $68 million at March 31, 2020 , and December 31, 2019 , 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, 2020 , and December 31, 2019 . Unconsolidated VIEs in millions Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2020 Indirect investments $ 12,221 $ 182 $ 84 December 31, 2019 Indirect investments $ 12,954 $ 205 $ 89 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, 2020 , and December 31, 2019 , that can be used to settle the entities’ obligations. The entities had no liabilities at March 31, 2020 , and December 31, 2019 , 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 13 (“ Variable Interest Entities “) beginning on page 146 of our 2019 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 $280 million at March 31, 2020 , and $282 million at December 31, 2019 . 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 $1 million and $1 million associated with these unconsolidated VIEs at March 31, 2020 , and December 31, 2019 , respectively. Additional information pertaining to our other unconsolidated VIEs is included in Note 13 (“ Variable Interest Entities “) under the heading “Other unconsolidated VIEs” on page 148 of our 2019 Form 10-K.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2020
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 13.4% for the first quarter of 2020 and 17.0% for the first quarter of 2019 . 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. Deferred Tax Asset At March 31, 2020 , we had a net deferred tax liability of $273 million , compared to a net deferred tax liability of $89 million at December 31, 2019 , which are both 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 no valuation allowance at March 31, 2020 , and December 31, 2019 . 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, 2020 , Key’s unrecognized tax benefits were $18 million . Pre-1988 Bank Reserves Acquired in a Business Combination Retained earnings of KeyBank included approximately $92 million of allocated bad debt deductions for which no income taxes have been recorded. Under current federal law, these reserves are subject to recapture into taxable income if KeyBank, or any successor, fails to maintain its bank status under the Internal Revenue Code or makes non-dividend distributions or distributions greater than its accumulated earnings and profits. No deferred tax liability has been established as these events are not expected to occur in the foreseeable future.

Acquisitions and Discontinued O

Acquisitions and Discontinued Operations	3 Months Ended
	Mar. 31, 2020
Business Combinations [Abstract]
Acquisitions and Discontinued Operations	12. Acquisition and Discontinued Operations Acquisition Laurel Road Digital Lending Business. On April 3, 2019, KeyBank acquired Laurel Road's digital lending business from Laurel Road Bank. Laurel Road Bank's three bank branches located in southeast Connecticut were 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 is accounted for as a business combination. During the second quarter of 2019, we recognized identifiable intangible assets with an estimated fair value of $37 million . We also recognized goodwill of $148 million in connection with this acquisition. Discontinued operations Discontinued operations primarily includes our government-guaranteed and private education lending business. At March 31, 2020 , and December 31, 2019 , approximately $821 million and $865 million , respectively, of education loans are included in discontinued assets on the consolidated balance sheets. Net interest income after provision for credit losses for this business is not material and is included in income (loss) from discontinued operations, net of taxes on the consolidated statements of income.

Securities Financing Activities

Securities Financing Activities	3 Months Ended
	Mar. 31, 2020
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 151 of our 2019 Form 10-K. The following table summarizes our securities financing agreements at March 31, 2020 , and December 31, 2019 : March 31, 2020 December 31, 2019 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 $ 4 $ (4 ) — — $ 5 $ (5 ) — — Total $ 4 $ (4 ) — — $ 5 $ (5 ) — — Offsetting of financial liabilities: Repurchase agreements (c) $ 194 $ (6 ) $ (188 ) — $ 187 $ (7 ) $ (180 ) — Total $ 194 $ (6 ) $ (188 ) — $ 187 $ (7 ) $ (180 ) — (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, 2020 , the carrying amount of assets pledged as collateral against repurchase agreements totaled $396 million . Assets pledged as collateral are reported in “securities available for sale” and “held-to-maturity securities” on our balance sheet. At March 31, 2020 , the liabilities associated with collateral pledged were solely comprised of customer sweep financing activity and had a carrying value of $188 million . The collateral pledged under customer sweep repurchase agreements is posted to a third-party custodian and cannot be sold or repledged by the secured party. The risk related to a decline in the market value of collateral pledged is minimal given the collateral's high credit quality and the overnight duration of the repurchase agreements.

Employee Benefits

Employee Benefits	3 Months Ended
	Mar. 31, 2020
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 18 (“ Employee Benefits ”) beginning on page 155 of our 2019 Form 10-K. Three months ended March 31, in millions 2020 2019 Interest cost on PBO $ 9 $ 11 Expected return on plan assets (10 ) (12 ) Amortization of losses 4 4 Settlement loss 4 — Net pension cost $ 7 $ 3

Trust Preferred Securities Issu

Trust Preferred Securities Issued by Unconsolidated Subsidiaries	3 Months Ended
	Mar. 31, 2020
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, 2020 KeyCorp Capital I $ 156 $ 6 $ 162 2.649 % 2028 KeyCorp Capital II 114 4 118 6.875 2029 KeyCorp Capital III 149 4 153 7.750 2029 HNC Statutory Trust III 19 1 20 3.083 2035 Willow Grove Statutory Trust I 19 1 20 2.051 2036 HNC Statutory Trust IV 17 1 18 3.050 2037 Westbank Capital Trust II 8 — 8 3.306 2034 Westbank Capital Trust III 8 — 8 3.306 2034 Total $ 490 $ 17 $ 507 5.213 % — December 31, 2019 $ 466 $ 17 $ 483 5.214 % — (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 $77 million at March 31, 2020 , and $57 million at December 31, 2019 . 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 $77 million at March 31, 2020 , and $57 million at December 31, 2019 . 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) The interest rates for the trust preferred securities issued by KeyCorp Capital II and KeyCorp Capital III are fixed. The trust preferred securities issued by KeyCorp Capital I have a floating interest rate, equal to three-month LIBOR plus 74 basis points, that reprices quarterly. The trust preferred securities issued by HNC Statutory Trust III have a floating interest rate, equal to three-month LIBOR plus 140 basis points, that reprices quarterly. The trust preferred securities issued by Willow Grove Statutory Trust I have a floating interest rate, equal to three-month LIBOR plus 131 basis points, that reprices quarterly. The trust preferred securities issued by HNC Statutory Trust IV have a floating interest rate, equal to three-month LIBOR plus 128 basis points, that reprices quarterly. The trust preferred securities issued by Westbank Capital Trust II and Westbank Capital Trust III each have a floating interest rate, equal to three-month LIBOR plus 219 basis points, that reprices quarterly. The total interest rates are weighted-average rates.

Contingent Liabilities and Guar

Contingent Liabilities and Guarantees	3 Months Ended
	Mar. 31, 2020
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, 2020 . 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 “Contingencies and Guarantees” beginning on page 108 of our 2019 Form 10-K. March 31, 2020 Maximum Potential Undiscounted Future Payments Liability Recorded in millions Financial guarantees: Standby letters of credit $ 3,352 $ 72 Recourse agreement with FNMA 5,098 20 Residential mortgage reserve 1,906 7 Written put options (a) 2,598 102 Total $ 12,954 $ 201 (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, 2020 , is low. Information pertaining to the nature of each of the guarantees listed below is included in Note 22 (“ Commitments, Contingent Liabilities, and Guarantees ”) under the heading “Guarantees” beginning on page 165 of our 2019 Form 10-K. Standby letters of credit. At March 31, 2020 , 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 15 years . Recourse agreement with FNMA. At March 31, 2020 , the outstanding commercial mortgage loans in this program had a weighted-average remaining term of 7.7 years , and the unpaid principal balance outstanding of loans sold by us as a participant was $17.1 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 30% of the principal balance of loans outstanding at March 31, 2020 . FNMA delegates responsibility for originating, underwriting, and servicing mortgages, and we assume a limited portion of the risk of loss during the remaining term on each commercial mortgage loan that we sell to FNMA. We maintain a reserve for such potential losses in an amount that we believe approximates the fair value of our liability in addition to the expected credit loss for the guarantee as described in Note 5 (“ Asset Quality “). Residential Mortgage Banking. At March 31, 2020 , the unpaid principal balance outstanding of loans sold by us in this program was $6.4 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 30% of the principal balance of loans outstanding at March 31, 2020 . Our liability for estimated repurchase obligations on loans sold, which is included in other liabilities on our balance sheet, was $7 million at March 31, 2020 . For more information on our residential mortgages, see Note 8 (“ Mortgage Servicing Assets “). Written put options. At March 31, 2020 , 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 of other off-balance sheet risk is included in Note 22 (“ Commitments, Contingent Liabilities, and Guarantees ”) under the heading “Other Off-Balance Sheet Risk” on page 168 of our 2019 Form 10-K.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
Accumulated Other Comprehensive Income	17. Accumulated Other Comprehensive Income Our changes in AOCI for the three months ended March 31, 2020 , and March 31, 2019 , 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, 2019 $ 115 $ 250 $ — $ (339 ) $ 26 Other comprehensive income before reclassification, net of income taxes 408 402 — — 810 Amounts reclassified from AOCI, net of income taxes (a) (3 ) (25 ) — 6 (22 ) Net current-period other comprehensive income, net of income taxes 405 377 — 6 788 Balance at March 31, 2020 $ 520 $ 627 $ — $ (333 ) $ 814 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 ) (a) See table below for details about these reclassifications. Our reclassifications out of AOCI for the three months ended March 31, 2020 , and March 31, 2019 , are as follows: Three months ended March 31, Affected Line Item in the Statement Where Net Income is Presented in millions 2020 2019 Unrealized gains (losses) on available for sale securities Realized gains $ 4 — Other income 4 — Income (loss) from continuing operations before income taxes 1 — Income taxes $ 3 — Income (loss) from continuing operations Unrealized gains (losses) on derivative financial instruments Interest rate $ 34 $ (24 ) Interest income — Loans Interest rate (1 ) (1 ) Interest expense — Long-term debt 33 (25 ) Income (loss) from continuing operations before income taxes 8 (6 ) Income taxes $ 25 (19 ) Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (4 ) $ (4 ) Other expense Settlement loss (4 ) — Other expense (8 ) (4 ) Income (loss) from continuing operations before income taxes (2 ) (1 ) Income taxes $ (6 ) (3 ) Income (loss) from continuing operations

Shareholders' Equity

Shareholders' Equity	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
Shareholders' Equity	18. Shareholders' Equity Comprehensive Capital Plan As previously reported and as authorized by the Board and pursuant to our 2019 capital plan (which is effective through the second quarter of 2020) submitted to and approved by the Federal Reserve, we have authority to repurchase up to $1.0 billion of our Common Shares. We completed $152 million of Common Share repurchases, including $117 million of Common Share repurchases in the open market and $35 million of Common Share repurchases related to employee equity compensation programs, in the first quarter of 2020 under this authorization. These repurchases were completed prior to our announcement on March 17, 2020, to temporarily suspend share repurchase activity in response to the COVID-19 pandemic. Consistent with our 2019 capital plan, the Board declared a quarterly dividend of $.185 per Common Share for the first quarter of 2020 . 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 2020 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 Fixed Rate Perpetual Non-Cumulative Series G 450 450,000 1 1,000 1/40th 25 .351563

Business Segment Reporting

Business Segment Reporting	3 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Business Segment Reporting	19. Business Segment Reporting 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, student loan refinancing, 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, 2020 , and March 31, 2019 . Three months ended March 31, Consumer Bank Commercial Bank Other Total Key dollars in millions 2020 2019 2020 2019 2020 2019 2020 2019 SUMMARY OF OPERATIONS Net interest income (TE) $ 590 $ 591 $ 410 $ 402 $ (11 ) $ (8 ) $ 989 $ 985 Noninterest income 230 214 219 300 28 22 477 536 Total revenue (TE) (a) 820 805 629 702 17 14 1,466 1,521 Provision for credit losses 140 45 214 16 5 1 359 62 Depreciation and amortization expense 21 23 36 29 35 36 92 88 Other noninterest expense 522 517 317 344 — 14 839 875 Income (loss) from continuing operations before income taxes (TE) 137 220 62 313 (23 ) (37 ) 176 496 Allocated income taxes and TE adjustments 32 52 (8 ) 63 7 (25 ) 31 90 Income (loss) from continuing operations 105 168 70 250 (30 ) (12 ) 145 406 Income (loss) from discontinued operations, net of taxes — — — — 1 1 1 1 Net income (loss) 105 168 70 250 (29 ) (11 ) 146 407 Less: Net income (loss) attributable to noncontrolling interests — — — — — — — — Net income (loss) attributable to Key $ 105 $ 168 $ 70 $ 250 $ (29 ) $ (11 ) $ 146 $ 407 AVERAGE BALANCES (b) Loans and leases $ 35,197 $ 31,321 $ 60,082 $ 57,267 $ 895 $ 1,061 $ 96,174 $ 89,649 Total assets (a) 38,460 34,732 69,383 64,873 38,385 40,515 146,228 140,120 Deposits 73,320 71,288 36,058 34,417 950 1,871 110,328 107,576 OTHER FINANCIAL DATA Net loan charge-offs (b) $ 43 $ 34 $ 40 $ 30 $ 1 — $ 84 $ 64 Return on average allocated equity (b) 12.18 % 21.27 % 6.00 % 22.60 % (1.33 )% (.61 )% 3.39 % 10.49 % Return on average allocated equity 12.18 21.27 6.00 22.60 (1.29 ) (.56 ) 3.41 10.51 Average full-time equivalent employees (c) 8,907 9,622 2,069 2,370 5,553 5,562 16,529 17,554 (a) Substantially all revenue generated by our major business segments is derived from clients that reside in the United States. Substantially all long-lived assets, including premises and equipment, capitalized software, and goodwill held by our major business segments, are located in the United States. (b) From continuing operations. (c) The number of average full-time equivalent employees was not adjusted for discontinued operations.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Mar. 31, 2020
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, 2020 , and March 31, 2019 . Three months ended March 31, 2020 Three months ended March 31, 2019 dollars in millions Consumer Bank Commercial Bank Total Contract Revenue Consumer Bank Commercial Bank Total Contract Revenue NONINTEREST INCOME Trust and investment services income $ 93 $ 19 $ 112 $ 85 $ 15 $ 100 Investment banking and debt placement fees — 47 47 — 45 45 Services charges on deposit accounts 56 28 84 54 27 81 Cards and payments income 38 26 64 37 26 63 Other noninterest income 2 — 2 3 — 3 Total revenue from contracts with customers $ 189 $ 120 $ 309 $ 179 $ 113 $ 292 Other noninterest income (a) $ 140 $ 222 Noninterest income from Other (b) 28 22 Total noninterest income $ 477 $ 536 (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, 2020 , and March 31, 2019 .

Basis of Presentation and Acc_2

Basis of Presentation and Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
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 2019 Form 10-K.
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 in 2020	Accounting Guidance Adopted in 2020 Measurement of Credit Losses on Financial Instruments (ASU 2016-13, ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2019-11, ASU 2020-02, ASU 2020-03) On January 1, 2020, we adopted ASU 2016-13, Financial Instruments - Credit Losses (ASC 326): Measurement of Credit Losses on Financial Instruments, which replaces the incurred-loss methodology that recognized losses when a probable threshold was met with an expected-loss methodology, specifically, recognizing current expected credit losses (CECL) for the remaining life of the asset at the time of origination or acquisition. The CECL methodology applies to loans, debt securities, and other financial assets and net investment in leases measured at amortized cost. It also applies to off-balance sheet credit exposures (loan commitments, standby letters of credit, financial guarantees, and other similar instruments). Assets in the scope of ASC 326 are presented at the net amount expected to be collected after deducting the allowance for credit losses from the amortized cost basis of the assets. ASC 326 also requires credit losses relating to available-for-sale debt securities that management does not intend to sell or believes that it is more likely than not they will be required to sell to be recorded through an allowance rather than a reduction of the carrying amount. ASC 326 replaces the purchased credit impaired concept of accounting, previously required under Subtopic 310-30, with a purchased financial assets with credit deterioration (PCD) concept. In accordance with ASC 326, we did not reassess whether recognized purchased credit impaired loans met the criteria of a PCD loan and modifications to individual acquired loans accounted for in pools were TDRs as of the date of adoption. At adoption, we elected to not maintain the pools of loans previously accounted for under Subtopic 310-30. The prospective application resulted in a $4 million adjustment to the amortized cost basis of PCD loans to reflect the addition to the allowance for loans and leases as of January 1, 2020. After the adjustment for the allowance for the loans and leases, the noncredit discount of $15 million will be accreted to interest income using the interest method based on the effective interest rate determined after the adjustment from credit losses as of January 1, 2020. The ASU requires use of a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. Results for reporting periods beginning after January 1, 2020, are presented under ASC 326 while prior period amounts continue to be reported in accordance with previously applicable GAAP. We posted an adjusting entry decreasing retained earnings as of January 1, 2020, by $230 million , net of deferred taxes of $71 million , for the cumulative effect of adopting ASC 326. The main drivers of the adjustment to retained earnings are summarized in the following table. Pre-ASC 326 Adoption Impact of ASC 326 Adoption As Reported Under ASC 326 in millions December 31, 2019 January 1, 2020 Allowance for credit losses Commercial Commercial and industrial $ 551 $ (141 ) $ 410 Real estate — commercial mortgage 143 16 159 Real estate — construction 22 (7 ) 15 Commercial lease financing 35 8 43 Total commercial loans 751 (124 ) 627 Consumer Real estate — residential mortgage 7 77 84 Home equity loans 31 147 178 Consumer direct loans 34 63 97 Credit cards 47 35 82 Consumer indirect loans 30 6 36 Total consumer loans 149 328 477 Total ALLL — continuing operations 900 204 1,104 Discontinued operations 10 31 41 Total ALLL 910 235 1,145 Accrued expense and other liabilities 75 70 145 Total allowance for credit losses $ 985 $ 305 $ 1,290 In conjunction with the adoption of ASC 326, the following are additional disclosures about our significant accounting policies related to CECL. Allowance for Held-to-Maturity Securities Debt securities that we have the intent and ability to hold until maturity are classified as held-to-maturity and are carried at cost and adjusted for amortization of premiums and accretion of discounts using the interest method. This method produces a constant rate of return on the adjusted carrying amount. Management classifies the held-to-maturity portfolio into the following major security types: agency residential collateralized mortgage obligations, agency residential mortgage-backed securities, agency commercial mortgage-backed securities, asset backed securities, and other. Management measures expected credit losses on held-to-maturity securities on a collective basis by major security type. The estimate of expected losses considers historical credit loss information that is adjusted for current conditions and reasonable and supportable forecasts. We do not measure expected credit losses on held-to-maturity securities in which historical credit loss information adjusted for current conditions and reasonable and supportable forecasts results in an expectation that nonpayment of the amortized cost basis is zero. All of our mortgage-backed securities are issued by U.S. government-sponsored enterprises or GNMA, are highly rated by major rating agencies and have a long history of no credit losses. Other securities are comprised of State of Israel bonds denominated and paid in U.S. dollars. Israel bonds have a long history of no credit losses. Additionally, as of March 31, 2020, the State of Israel's credit rating remains "stable" among Fitch, Moody's, and S&P (A+, A1, A+). Allowance for Available-for-Sale Securities Debt securities that we intend to hold for an indefinite period of time but that may be sold in response to changes in interest rates, prepayment risk, liquidity needs, or other factors are classified as available-for-sale and reported at fair value. Realized gains and losses resulting from sales of securities using the specific identification method are included in “other income” on the income statement. Unrealized gains and losses (net of income taxes) are recorded in equity as a component of AOCI. For available-for-sale securities in an unrealized loss position, we first assess whether we intend to sell, or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis. If either of these criteria regarding intent or requirement to sell is met, the security's amortized cost basis is written down to fair value in “other income” on the income statement. For debt securities that do not meet the aforementioned criteria, we evaluate whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, nature of the security, the underlying collateral, and the financial condition of the issuer, among other factors. If this assessment indicates a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis, a credit loss exists and an allowance for available-for-sale securities is recorded for the credit loss, limited by the amount that the fair value is less than the amortized cost basis. Any impairment that has not been recorded through an allowance for available-for-sale securities is recognized in other comprehensive income. Changes in the allowance for available-for-sale securities are recorded as provision for (or reversal of) credit loss. Losses are charged against the allowance for available-for-sale securities when management believes the uncollectibility of an available-for-sale security is confirmed or when either criteria regarding intent or requirement to sell is met. Loans Accrued interest on loans is included in "other assets" on the balance sheet and is excluded from the calculation of the allowance for credit losses due to our charge-off policy to reverse accrued interest on nonperforming loans against interest income in a timely manner. Expected credit losses on net investments in leases, including any unguaranteed residual asset, are included in the ALLL. Purchased Credit Deteriorated (PCD) Loans In addition to originating loans, we also acquire loans through portfolio purchases or acquisitions of other financial services companies. Purchased loans that have evidence of more than insignificant credit deterioration since origination are deemed PCD loans. In accordance with ASC 326, we did not reassess whether recognized purchased credit impaired loans met the criteria of a PCD loan as of the date of adoption. PCD loans are initially recorded at fair value along with an allowance for credit losses determined using the same methodology as originated loans. The sum of the loan's purchase price and allowance for credit losses becomes its initial amortized cost basis. The difference between the initial amortized cost basis and the par value of the loan is a noncredit discount or premium, which is amortized into interest income over the life of the loan. Subsequent changes to the allowance for credit losses are recorded through provision for credit losses. Nonperforming Loans Nonperforming loans are loans for which we do not accrue interest income, and include commercial and consumer loans and leases, as well as current year TDRs and nonaccruing TDR loans from prior years. Nonperforming loans do not include loans held for sale. Once a loan is designated nonaccrual, the interest accrued but not collected is reversed against interest income, and payments subsequently received are applied to principal until qualifying for return to accrual. Allowance for Loan and Lease Losses We estimate the ALLL using relevant available information, from internal and external sources, relating to past events, current conditions, and reasonable and supportable forecasts. The ALLL is measured on a collective (pool) basis when similar risk characteristics exist. Our portfolio segments include commercial and consumer. Each of these two segments comprises multiple loan classes. Classes are characterized by similarities in initial measurement, risk attributes, and the manner in which we monitor and assess credit risk. The commercial segment is composed of commercial and industrial, commercial real estate, and commercial lease financing loan classes. The consumer lending segment is composed of residential mortgage, home equity, consumer direct, credit card, and consumer indirect loan classes. The ALLL represents our current estimate of lifetime credit losses inherent in our loan portfolio at the balance sheet date. In determining the ALLL, we estimate expected future losses for the loan's entire contractual term adjusted for expected prepayments when appropriate. The contractual term excludes expected extensions, renewals, and modifications. The ALLL is the sum of three components: (i) asset specific/ individual loan reserves; (ii) quantitative (formulaic or pooled) reserves; and (iii) qualitative (judgmental) reserves. Asset Specific / Individual Component Loans that do not share risk characteristics are evaluated on an individual basis. Loans evaluated individually are not included in the collective evaluation. We have elected to apply the practical expedient to measure expected credit losses of a collateral dependent asset using the fair value of the collateral, less any costs to sell, when foreclosure is not probable, when repayment of the loan is expected to be provided substantially through the operation or sale of the collateral, and the borrower is experiencing financial difficulty. Individual reserves are determined as follows: • For commercial non-accruing loans greater than or equal to a defined dollar threshold, individual reserves are determined based on an analysis of the present value of the loan's expected future cash flows, the loan's observable market value, or the fair value of the collateral less costs to sell. • For commercial non-accruing loans below the defined dollar threshold, an established LGD percentage is multiplied by the loan balance and the results are aggregated for purposes of measuring specific reserve impairment. • The population of individually assessed consumer loans includes loans deemed collateral dependent, in addition to all TDRs. The expected loss for these loans is estimated based on the present value of the loan's expected future cash flows, except in instances where the loan is collateral dependent, in which case the loan is written down based on the collateral's fair market value less costs to sell. Quantitative Component We use a non-DCF factor-based approach to estimate expected credit losses that include component PD/LGD/EAD models as well as less complex estimation methods for smaller loan portfolios. • PD: This component model is used to estimate the likelihood that a borrower will cease making payments as agreed. The major contributors to this are the borrower credit attributes and macro-economic trends. The objective of the PD model is to produce default likelihood forecasts based on the observed loan-level information and projected paths of macroeconomic variables. • LGD: This component model is used to estimate the loss on a loan once a loan is in default. • EAD: Estimates the loan balance at the time the borrower stops making payments. For all term loans, an amortization based formulaic approach is used for account level EAD estimates. We calculate EAD using a portfolio specific method in each of our revolving product portfolios. For line products that are unconditionally cancellable, the balances will either use a paydown curve or be held flat through the life of the loan. Additional information about the critical estimates and judgments we make in developing these models is provided in the section “Allowance for loan and lease losses” under the heading” Critical Accounting Policies and Estimates” in Item 2 of this report. Qualitative Component The ALLL also includes identified qualitative factors related to idiosyncratic risk factors, changes in current economic conditions that may not be reflected in quantitatively derived results, and other relevant factors to ensure the ALLL reflects our best estimate of current expected credit losses. While our reserve methodologies strive to reflect all relevant risk factors, there continues to be uncertainty associated with, but not limited to, potential imprecision in the estimation process due to the inherent time lag of obtaining information and normal variations between estimates and actual outcomes. We provide additional reserves that are designed to provide coverage for losses attributable to such risks. The ALLL also includes factors that may not be directly measured in the determination of individual or collective reserves. Such qualitative factors may include: • The nature and volume of the institution’s financial assets; • The existence, growth, and effect of any concentrations of credit; • The volume and severity of past due financial assets, the volume of nonaccrual assets, and the volume and severity of adversely classified or graded assets; • The value of the underlying collateral for loans that are not collateral dependent; • The institution’s lending policies and procedures, including changes in underwriting standards and practices for collections, write-offs, and recoveries; • The quality of the institution’s credit review function; • The experience, ability, and depth of the institution’s lending, investment, collection, and other relevant management and staff; • The effect of other external factors such as the regulatory, legal and technological environments; competition; and events such as natural disasters; and • Actual and expected changes in international, national, regional, and local economic and business conditions and developments in which the institution operates that affect the collectability of financial assets. Liability for Credit Losses on Lending-Related Commitments The liability for credit losses on lending-related commitments, such as letters of credit and unfunded loan commitments, is included in “accrued expense and other liabilities” on the balance sheet. Expected credit losses are estimated over the contractual period in which we are exposed to credit risk via a contractual obligation unless that obligation is unconditionally cancellable by us. The liability for credit losses on lending-related commitments is adjusted as a provision for credit losses. The estimate includes consideration of the likelihood that funding will occur and an estimate of expected credit losses on commitments expected to be funded over its estimated useful life. Consistent with our estimation process on our loan and lease portfolio, we use a non-DCF factor-based approach to estimate expected credit losses that include component PD/LGD/EAD models as well as less complex estimation methods for smaller portfolios. Simplifying the Test for Goodwill Impairment (ASU 2017-04) On January 1, 2020, we adopted ASU 2017-04. The ASU amends ASC Topic 350, Intangibles - Goodwill and Other and eliminates the second step of the test for goodwill impairment. Under the new guidance, Key will compare the fair value of a reporting unit with its carrying amount. If the carrying amount exceeds the reporting unit’s fair value, we are required to recognize an impairment charge for this amount. The new method applies to all reporting units and the performance of a qualitative assessment is still allowable. We will monitor for impairment indicators and conduct our annual goodwill test as of October 1, 2020. The adoption of this accounting guidance must be applied prospectively and is not currently expected to have a material effect on our financial condition or results of operations. Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting (ASU 2020-04) This quarter we adopted ASU 2020-04 upon issuance. The amendments provide optional expedients and exceptions for certain contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of rate reform. The guidance is effective from the date of issuance until December 31, 2022. The guidance permits Key not to apply modification accounting or remeasure lease payments in lease contracts if the changes to the contract are related to the discontinuation of the reference rate. If certain criteria are met, the amendments also allow exceptions to the dedesignation criteria of the hedging relationship and the assessment of hedge effectiveness during the transition period. It also allows Key to make a one time election to sell, transfer, or both sell and transfer debt securities classified as held to maturity that reference a rate affected by reference rate reform and that are classified as held to maturity before January 1, 2020. This one time election may be made at any time after March 12, 2020, but no later than December 31, 2022. Key has not yet made a determination on whether it will make this election. At the time of adoption, the guidance did not have a significant impact on Key’s financial condition and results of operations. We will continue to assess the impact as the reference rate transition occurs over the next two years.

Basis of Presentation and Acc_3

Basis of Presentation and Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The main drivers of the adjustment to retained earnings are summarized in the following table. Pre-ASC 326 Adoption Impact of ASC 326 Adoption As Reported Under ASC 326 in millions December 31, 2019 January 1, 2020 Allowance for credit losses Commercial Commercial and industrial $ 551 $ (141 ) $ 410 Real estate — commercial mortgage 143 16 159 Real estate — construction 22 (7 ) 15 Commercial lease financing 35 8 43 Total commercial loans 751 (124 ) 627 Consumer Real estate — residential mortgage 7 77 84 Home equity loans 31 147 178 Consumer direct loans 34 63 97 Credit cards 47 35 82 Consumer indirect loans 30 6 36 Total consumer loans 149 328 477 Total ALLL — continuing operations 900 204 1,104 Discontinued operations 10 31 41 Total ALLL 910 235 1,145 Accrued expense and other liabilities 75 70 145 Total allowance for credit losses $ 985 $ 305 $ 1,290

Earnings Per Common Share (Tabl

Earnings Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2020
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 2020 2019 EARNINGS Income (loss) from continuing operations $ 145 $ 406 Less: Net income (loss) attributable to noncontrolling interests — — Income (loss) from continuing operations attributable to Key 145 406 Less: Dividends on Preferred Stock 27 20 Income (loss) from continuing operations attributable to Key common shareholders 118 386 Income (loss) from discontinued operations, net of taxes 1 1 Net income (loss) attributable to Key common shareholders $ 119 $ 387 WEIGHTED-AVERAGE COMMON SHARES Weighted-average Common Shares outstanding (000) 967,446 1,006,717 Effect of Common Share options and other stock awards 8,664 9,787 Weighted-average Common Shares and potential Common Shares outstanding (000) (a) 976,110 1,016,504 EARNINGS PER COMMON SHARE Income (loss) from continuing operations attributable to Key common shareholders $ .12 $ .38 Income (loss) from discontinued operations, net of taxes — — Net income (loss) attributable to Key common shareholders (b) .12 .38 Income (loss) from continuing operations attributable to Key common shareholders — assuming dilution $ .12 $ .38 Income (loss) from discontinued operations, net of taxes — assuming dilution — — Net income (loss) attributable to Key common shareholders — assuming dilution (b) .12 .38 (a) Assumes conversion of Common Share options and other stock awards and/or convertible preferred stock, as applicable. (b) EPS may not foot due to rounding.

Loan Portfolio (Tables)

Loan Portfolio (Tables)	3 Months Ended
	Mar. 31, 2020
Loans Receivables [Abstract]
Loans by Category	in millions March 31, 2020 December 31, 2019 Commercial and industrial (b) $ 55,983 $ 48,295 Commercial real estate: Commercial mortgage 13,548 13,491 Construction 1,710 1,558 Total commercial real estate loans 15,258 15,049 Commercial lease financing (c) 4,677 4,688 Total commercial loans 75,918 68,032 Residential — prime loans: Real estate — residential mortgage 7,498 7,023 Home equity loans 10,103 10,274 Total residential — prime loans 17,601 17,297 Consumer direct loans 3,833 3,513 Credit cards 1,041 1,130 Consumer indirect loans 4,805 4,674 Total consumer loans 27,280 26,614 Total loans (d) $ 103,198 $ 94,646 (a) Accrued interest of $241 million and $244 million at March 31, 2020 , and December 31, 2019 , respectively, presented in "other assets" on the Consolidated Balance Sheets is excluded from the amortized cost basis disclosed in this table. (b) Loan balances include $143 million and $144 million of commercial credit card balances at March 31, 2020 , and December 31, 2019 , respectively. (c) Commercial lease financing includes receivables held as collateral for a secured borrowing of $14 million and $15 million at March 31, 2020 , and December 31, 2019 , 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 20 (“ Long-Term Debt ”) beginning on page 163 of our 2019 Form 10-K. (d) Total loans exclude loans of $821 million at March 31, 2020 , and $865 million at December 31, 2019 , related to the discontinued operations of the education lending business.

Asset Quality (Tables)

Asset Quality (Tables)	3 Months Ended
	Mar. 31, 2020
Credit Loss [Abstract]
Financing Receivable, Allowance for Credit Loss	The changes in the ALLL by loan category for the periods indicated are as follows: Three months ended March 31, 2020 : in millions January 1, 2020 Provision Charge-offs Recoveries March 31, 2020 Commercial and Industrial $ 410 $ 187 $ (60 ) $ 5 $ 542 Commercial real estate: Real estate — commercial mortgage 159 50 (3 ) 1 207 Real estate — construction 15 10 — — 25 Total commercial real estate loans 174 60 (3 ) 1 232 Commercial lease financing 43 3 (2 ) — 44 Total commercial loans 627 250 (65 ) 6 818 Real estate — residential mortgage 84 5 — — 89 Home equity loans 178 8 (4 ) 2 184 Consumer direct loans 97 29 (12 ) 2 116 Credit cards 82 31 (11 ) 2 104 Consumer indirect loans 36 16 (9 ) 5 48 Total consumer loans 477 89 (36 ) 11 541 Total ALLL — continuing operations 1,104 339 (a) (101 ) 17 1,359 Discontinued operations 41 3 (2 ) 1 43 Total ALLL — including discontinued operations $ 1,145 $ 342 $ (103 ) $ 18 $ 1,402 (a) Excludes a provision for losses on lending-related commitments of $20 million . 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 .
Significant Macroeconomic Variables of Loan Portfolios	The following table discloses the most significant macroeconomic variables to each loan portfolio. Segment Portfolio Significant Macroeconomic Variables (a) Commercial Commercial and industrial BBB corporate bond rate (spread), GDP, industrial production, and unemployment rate Commercial real estate BBB corporate bond rate (spread), property and real estate price indices, and unemployment rate Commercial lease financing BBB corporate bond rate (spread), GDP, and unemployment rate Consumer Real estate — residential mortgage GDP, home price index, unemployment rate, and 30 year mortgage rate Home equity Home price index, unemployment rate, and 30 year mortgage rate Consumer direct Unemployment rate and U.S. household income Consumer indirect New vehicle sales and unemployment rate Credit cards Unemployment rate and U.S. household income Discontinued operations Unemployment rate
Financing Receivable Credit Quality Indicators	Credit Risk Profile by Creditworthiness Category and Vintage (a) As of March 31, 2020 Term Loans Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Amortized Cost Basis by Origination Year and Internal Risk Rating in millions 2019 2018 2017 2016 2015 Prior Total Commercial and Industrial Risk Rating: Pass $ 3,137 $ 7,197 $ 5,497 $ 3,517 $ 2,541 $ 3,947 $ 28,058 $ 145 $ 54,039 Criticized (Accruing) 6 56 129 177 110 169 1,004 16 1,667 Criticized (Nonaccruing) — 25 16 36 8 62 126 4 277 Total commercial and industrial 3,143 7,278 5,642 3,730 2,659 4,178 29,188 165 55,983 Real estate — commercial mortgage Risk Rating: Pass 726 3,346 2,074 1,067 1,011 3,774 1,089 42 13,129 Criticized (Accruing) — 6 21 51 40 205 7 2 332 Criticized (Nonaccruing) — — 1 3 1 77 4 1 87 Total real estate — commercial mortgage 726 3,352 2,096 1,121 1,052 4,056 1,100 45 13,548 Real estate — construction Risk Rating: Pass 36 509 703 326 69 21 14 3 1,681 Criticized (Accruing) — — — — 23 3 1 — 27 Criticized (Nonaccruing) — — — — 2 — — 2 Total real estate — construction 36 509 703 326 92 26 15 3 1,710 Commercial lease financing Risk Rating: Pass 313 1,348 763 697 345 1,162 — — 4,628 Criticized (Accruing) — 2 6 12 12 12 — — 44 Criticized (Nonaccruing) — — 1 1 3 — — — 5 Total commercial lease financing 313 1,350 770 710 360 1,174 — 4,677 Total commercial loans $ 4,218 $ 12,489 $ 9,211 $ 5,887 $ 4,163 $ 9,434 $ 30,303 $ 213 $ 75,918 (a) Accrued interest of $142 million , presented in Other Assets on the Consolidated Balance Sheets, was excluded from the amortized cost basis disclosed in this table. Consumer Credit Exposure Credit Risk Profile by FICO Score and Vintage (a) As of March 31, 2020 Term Loans Revolving Loans Amortized Cost Basis Revolving Loans Converted to Term Loans Amortized Cost Basis Amortized Cost Basis by Origination Year and FICO Score in millions 2019 2018 2017 2016 2015 Prior Total Real estate — residential mortgage FICO Score: 750 and above $ 648 $ 1,923 $ 344 $ 368 $ 686 $ 1,662 — — $ 5,631 660 to 749 166 525 123 76 127 431 — — 1,448 Less than 660 5 36 28 12 33 223 — — 337 No Score — 4 3 7 5 63 — — 82 Total real estate — residential mortgage 819 2,488 498 463 851 2,379 — — 7,498 Home equity loans FICO Score: 750 and above 168 475 208 231 219 972 $ 2,898 $ 444 5,615 660 to 749 58 296 142 154 128 476 1,902 228 3,384 Less than 660 5 57 41 34 38 186 648 71 1,080 No Score 5 3 1 1 — 3 8 3 24 Total home equity loans 236 831 392 420 385 1,637 5,456 746 10,103 Consumer direct loans FICO Score: 750 and above 359 1,283 157 48 26 74 137 — 2,084 660 to 749 111 429 117 38 23 44 304 — 1,066 Less than 660 3 47 31 13 7 14 113 — 228 No Score 170 67 30 23 17 15 133 — 455 Total consumer direct loans 643 1,826 335 122 73 147 687 — 3,833 Credit cards FICO Score: 750 and above — — — — — — 459 — 459 660 to 749 — — — — — — 459 — 459 Less than 660 — — — — — — 122 — 122 No Score — — — — — — 1 — 1 Total credit cards — — — — — — 1,041 — 1,041 Consumer indirect loans FICO Score: 750 and above 383 1,066 476 278 124 114 — — 2,441 660 to 749 206 816 351 165 70 91 — — 1,699 Less than 660 38 259 154 89 47 48 — — 635 No Score 28 1 — — — 1 — — 30 Total consumer indirect loans 655 2,142 981 532 241 254 — — 4,805 Total consumer loans $ 2,353 $ 7,287 $ 2,206 $ 1,537 $ 1,550 $ 4,417 $ 7,184 $ 746 $ 27,280 (a) Accrued interest of $99 million , presented in Other Assets on the Consolidated Balance Sheets, was excluded from the amortized cost basis disclosed in this table.
Past Due Loans Including Current Loans	The following aging analysis of past due and current loans as of March 31, 2020 , and December 31, 2019 , provides further information regarding Key’s credit exposure. Aging Analysis of Loan Portfolio (a) March 31, 2020 Current 30-59 Days Past Due (b) 60-89 Days Past Due (b) 90 and Greater Days Past Due (b) Non-performing Loans (c) Total Past Due and Non-performing Loans (c) Total Loans (d) in millions LOAN TYPE Commercial and industrial $ 55,455 $ 100 $ 78 $ 73 $ 277 $ 528 $ 55,983 Commercial real estate: Commercial mortgage 13,381 28 34 18 87 167 13,548 Construction 1,702 4 — 2 2 8 1,710 Total commercial real estate loans 15,083 32 34 20 89 175 15,258 Commercial lease financing 4,644 14 5 9 5 33 4,677 Total commercial loans $ 75,182 $ 146 $ 117 $ 102 $ 371 $ 736 $ 75,918 Real estate — residential mortgage $ 7,397 $ 10 $ 2 $ — $ 89 $ 101 $ 7,498 Home equity loans 9,910 34 11 5 143 193 10,103 Consumer direct loans 3,801 17 4 7 4 32 3,833 Credit cards 1,015 7 5 11 3 26 1,041 Consumer indirect loans 4,740 32 8 3 22 65 4,805 Total consumer loans $ 26,863 $ 100 $ 30 $ 26 $ 261 $ 417 $ 27,280 Total loans $ 102,045 $ 246 $ 147 $ 128 $ 632 $ 1,153 $ 103,198 (a) Amounts in table represent amortized cost and exclude loans held for sale. (b) Accrued interest of $241 million presented in “other assets” on the Consolidated Balance Sheets is excluded from the amortized cost basis disclosed in this table. (c) PCI loans meeting nonperforming criteria were historically excluded from Key's nonperforming disclosures. As a result of CECL implementation on January 1, 2020, PCI loans became PCD loans. PCD loans that met the definition of nonperforming are now included in nonperforming disclosures. (d) Net of unearned income, net of deferred fees and costs, and unamortized discounts and premiums. December 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 in millions LOAN TYPE Commercial and industrial $ 47,768 $ 110 $ 52 $ 53 $ 264 $ 479 48 $ 48,295 Commercial real estate: Commercial mortgage 13,258 8 5 13 83 109 124 13,491 Construction 1,551 3 — 1 2 6 1 1,558 Total commercial real estate loans 14,809 11 5 14 85 115 125 15,049 Commercial lease financing 4,647 22 11 2 6 41 — 4,688 Total commercial loans $ 67,224 $ 143 $ 68 $ 69 $ 355 $ 635 173 $ 68,032 Real estate — residential mortgage $ 6,705 $ 7 $ 5 $ 1 $ 48 $ 61 $ 257 $ 7,023 Home equity loans 10,071 30 10 5 145 190 13 10,274 Consumer direct loans 3,484 10 5 7 4 26 3 3,513 Credit cards 1,104 6 5 12 3 26 — 1,130 Consumer indirect loans 4,609 32 8 3 22 65 — 4,674 Total consumer loans $ 25,973 $ 85 $ 33 $ 28 $ 222 $ 368 $ 273 $ 26,614 Total loans $ 93,197 $ 228 $ 101 $ 97 $ 577 $ 1,003 $ 446 $ 94,646 (a) Amounts in table represent recorded investment and exclude loans held for sale. Recorded investment represents the principal amount of the loan increased or decreased by 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.
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 2020 2019 Consumer loans: Interest rate reduction $ 9 $ 4 Other 9 9 Total $ 18 $ 13 Total TDRs $ 18 $ 13
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 2020 2019 Balance at beginning of the period $ 347 $ 399 Additions 17 14 Payments (18 ) (39 ) Charge-offs (6 ) (9 ) Balance at end of period $ 340 $ 365
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, 2020 December 31, 2019 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 35 $ 65 $ 43 51 $ 72 $ 53 Commercial real estate: Commercial mortgage 7 64 58 6 64 58 Total commercial real estate loans 7 64 58 6 64 58 Total commercial loans 42 129 101 57 136 111 Real estate — residential mortgage 194 16 14 181 13 11 Home equity loans 625 38 37 713 42 41 Consumer direct loans 168 2 2 172 2 2 Credit cards 324 2 2 368 2 2 Consumer indirect loans 1,097 19 15 1,131 19 16 Total consumer loans 2,408 77 70 2,565 78 72 Total nonperforming TDRs 2,450 206 171 2,622 214 183 Prior-year accruing: (a) Commercial and industrial 5 30 25 6 30 25 Commercial real estate Commercial mortgage 1 1 — 1 — — Total commercial real estate loans 1 1 — 1 — — Total commercial loans 6 31 25 7 30 25 Real estate — residential mortgage 489 36 31 493 37 31 Home equity loans 1,839 110 90 1,751 104 84 Consumer direct loans 165 4 3 139 4 3 Credit cards 577 3 1 486 3 1 Consumer indirect loans 784 33 19 714 33 20 Total consumer loans 3,854 186 144 3,583 181 139 Total prior-year accruing TDRs 3,860 217 169 3,590 211 164 Total TDRs 6,310 $ 423 $ 340 6,212 $ 425 $ 347 (a) All TDRs that were restructured prior to January 1, 2020 , and January 1, 2019 , and are fully accruing.
Changes in Liability for Credit Losses on Off-Balance Sheet Exposures	Changes in the liability for credit losses on off balance sheet exposures are summarized as follows: Three months ended March 31, in millions 2020 2019 Balance at the end of the prior period $ 68 $ 64 Liability for credit losses on contingent guarantees at the end of the prior period 7 — Cumulative effect from change in accounting principle (a), (b) 66 — Balance at beginning of period 141 64 Provision (credit) for losses on off balance sheet exposures 20 (2 ) Balance at end of period $ 161 $ 62 (a) The cumulative effect from change in accounting principle relates to the January 1, 2020, adoption of ASU 2016-13. (b) Excludes $4 million related to the provision for other financial assets.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 , and December 31, 2019 . March 31, 2020 December 31, 2019 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 — $ 556 — $ 556 — $ 843 — $ 843 States and political subdivisions — 19 — 19 — 30 — 30 Other mortgage-backed securities — 176 — 176 — 78 — 78 Other securities — 38 — 38 — 44 — 44 Total trading account securities — 789 — 789 — 995 — 995 Commercial loans — 6 — 6 — 45 — 45 Total trading account assets — 795 — 795 — 1,040 — 1,040 Securities available for sale: U.S. Treasury, agencies and corporations — 341 — 341 — 334 — 334 States and political subdivisions — 4 — 4 — 4 — 4 Agency residential collateralized mortgage obligations — 12,045 — 12,045 — 12,783 — 12,783 Agency residential mortgage-backed securities — 1,539 — 1,539 — 1,714 — 1,714 Agency commercial mortgage-backed securities — 6,869 — 6,869 — 6,997 — 6,997 Other securities — — $ 9 9 — — $ 11 11 Total securities available for sale — 20,798 9 20,807 — 21,832 11 21,843 Other investments: Principal investments: Direct — — 1 1 — — 1 1 Indirect (measured at NAV) (a) — — — 64 — — — 68 Total principal investments — — 1 65 — — 1 69 Equity investments: Direct — — 10 10 — — 12 12 Direct (measured at NAV) (a) — — — 1 — — — 1 Indirect (measured at NAV) (a) — — — 8 — — — 8 Total equity investments — — 10 19 — — 12 21 Total other investments — — 11 84 — — 13 90 Loans, net of unearned income (residential) — — 3 3 — — 4 4 Loans held for sale (residential) — 142 10 152 — 140 — 140 Derivative assets: Interest rate — 1,845 96 1,941 — 941 22 963 Foreign exchange 124 40 — 164 $ 49 18 — 67 Commodity — 704 — 704 — 208 — 208 Credit — 6 5 11 — — 1 1 Other — 34 23 57 — 9 5 14 Derivative assets 124 2,629 124 2,877 49 1,176 28 1,253 Netting adjustments (b) — — — (809 ) — — — (473 ) Total derivative assets 124 2,629 124 2,068 49 1,176 28 780 Accrued income and other assets — — — — — — — — Total assets on a recurring basis at fair value $ 124 $ 24,364 $ 157 $ 23,909 $ 49 $ 24,188 $ 56 $ 23,897 LIABILITIES MEASURED ON A RECURRING BASIS Bank notes and other short-term borrowings: Short positions $ 124 $ 482 — $ 606 $ 19 $ 686 — $ 705 Derivative liabilities: Interest rate — 329 — 329 — 253 — 253 Foreign exchange 117 40 — 157 43 17 — 60 Commodity — 690 — 690 — 200 — 200 Credit — — $ 28 28 — 1 9 10 Other — 40 — 40 — 10 — 10 Derivative liabilities 117 1,099 28 1,244 43 481 9 533 Netting adjustments (b) — — — (595 ) — — — (335 ) Total derivative liabilities 117 1,099 28 649 43 481 9 198 Total liabilities on a recurring basis at fair value $ 241 $ 1,581 $ 28 $ 1,255 $ 62 $ 1,167 9 $ 903 (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.
Fair Value Measurement Inputs and 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, 2020, 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, 2020, 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 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 and student loans held for sale Through a quarterly analysis of our loan portfolios held for sale, which include both performing and nonperforming commercial loans and student 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, other repossessed personal property, and right-of-use assets (a) OREO, other repossessed properties, and right-of-use assets 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 (a) 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 benefits 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. Level 3 Mortgage Servicing Assets ( a) Refer to Note 8. Mortgage Servicing Assets Level 3 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 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, including: • Credit spreads and interest rates The unobservable internally derived assumptions include: • Loss given default • Internal risk assessments of customers and the remaining term of the underlying transactions The fair value represents an estimate of the amount that the risk participation counterparty would need to pay/receive as of the measurement date based on the probability of customer default on the swap transaction and the fair value of the underlying customer swap. Therefore, a higher loss probability and a lower credit rating would negatively affect the fair value of the risk participations and a lower loss probability and higher credit rating would positively affect the fair value of the risk participations. 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
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, 2020 , as well as financial support provided for the three months ended March 31, 2020 , and March 31, 2019 . Financial support provided Three months ended March 31, March 31, 2020 2020 2019 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) 64 $ 20 $ — — $ 1 — Total $ 65 $ 20 — $ — $ 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, 2020 , 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.
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 measured at fair value on a recurring basis for the three months ended March 31, 2020 , and March 31, 2019 . 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, 2020 Securities available for sale Other securities $ 11 $ (2 ) — — — — — — — $ 9 — Other investments Principal investments Direct 1 — — $ — $ — — — — — 1 — Equity investments Direct 12 — (2 ) (a) — — — — $ — — 10 (2 ) (a) Loans held for sale (residential) — — — — — — $ 10 — — 10 — Loans, net of unearned income (residential) 4 — — — (1 ) — — — — 3 — Derivative instruments (b) Interest rate 22 — $ 19 (c) 11 (1 ) — — 55 (d) $ (10 ) (d) 96 — Credit (8 ) — (16 ) (c) 1 — — — — — (23 ) — Other (e) 5 — — — — — 18 — — 23 — 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 (a) 1 — — $ 1 $ (1 ) — — — — 1 — Equity investments Direct 7 — — — — — — $ 1 — 8 — Loans held for sale (residential) — — — — — — $ 1 — — 1 — Loans, net of unearned income (residential) 3 — — — — — — — — 3 — Derivative instruments (b) Interest rate 5 — $ 1 (c) — — — — 1 (d) $ (4 ) (d) 3 — Credit — — — (1 ) — $ — — — — (1 ) — Other (e) 3 — — — — — $ 1 — — 4 — (a) Realized and unrealized gains and losses on principal investments and other equity 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 Nonrecurring Basis	The following table presents our assets measured at fair value on a nonrecurring basis at March 31, 2020 , and December 31, 2019 : March 31, 2020 December 31, 2019 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 — $ — $ 33 $ 33 — — $ 76 $ 76 Accrued income and other assets — — 64 64 — 118 51 169 Total assets on a nonrecurring basis at fair value — $ — $ 97 $ 97 — 118 $ 127 $ 245
Quantitative Information about Level 3 Fair Value Measurements	Level 3 Asset (Liability) Valuation Technique Significant Unobservable Input Range (Weighted-Average) (b), (c) dollars in millions March 31, 2020 December 31, 2019 March 31, 2020 December 31, 2019 Recurring Securities available-for-sale: Other securities $ 9 $ 11 Discounted cash flows Discount rate N/A (14.82%) N/A (16.10%) Marketability discount N/A (30.00%) N/A (30.00%) Volatility factor N/A (43.00%) N/A (43.00%) Other investments: (a) Equity investments Direct 10 12 Discounted cash flows Discount rate 12.40 - 17.03% (14.75%) 13.91 - 17.24% (15.61%) Marketability discount N/A (30.00%) N/A (30.00%) Volatility factor N/A (51.00%) N/A (47.00%) Loans held for sale (residential) 10 — Market comparable pricing Comparability factor 104.15-107.01% (105.25%) N/A Loans, net of unearned income (residential) 3 4 Market comparable pricing Comparability factor 79.00-98.00% (91.07%) 79.00 - 98.00% (91.05%) Derivative instruments: Interest rate 96 22 Discounted cash flows Probability of default .02 - 100% (13.90%) .02 - 100% (5.40%) Internal risk rating 1 - 19 (9.178) 1 - 19 (9.168) Loss given default 0 - 1 (.476) 0 - 1 (.492) Credit (assets) 5 1 Discounted cash flows Probability of default .02 - 100% (13.30%) .02 - 100% (4.2%) Internal risk rating 1 - 19 (10.14) 1 - 19 (10.13) Loss given default 0 - 1 (.493) 0 - 1 (.498) Credit (liabilities) (28 ) (9 ) Discounted cash flows Probability of default .02 - 100% (25.19%) .02 - 100% (12.24%) Internal risk rating 1 - 19 (7.76) 1 - 19 (8.058) Loss given default 0 - 1 (.394) 0 - 1 (.411) Other (d) 23 5 Discounted cash flows Loan closing rates 27.34-99.31 % (74.08%) 37.71 - 99.69% (79.33%) Nonrecurring Impaired loans 33 76 Fair value of underlying collateral Discount rate 0 - 90.00% (23.00%) 0 - 60.00% (10.00%) Accrued income and other assets: OREO and other Level 3 assets (e) 2 5 Appraised value Appraised value N/M N/M (a) Principal investments, direct is excluded from this table as the balance at March 31, 2020 , and December 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. (e) Excludes $62 million and $46 million pertaining to mortgage servicing assets at March 31, 2020 and December 31, 2019 . Refer to Note 8 (“ Mortgage Servicing Assets ”) for significant unobservable inputs pertaining to these assets.
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, 2020 , and December 31, 2019 , are shown in the following tables. Assets and liabilities are further arranged by measurement category. March 31, 2020 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) $ 795 $ — $ 795 — — — $ 795 Other investments (b) 679 — — $ 606 $ 73 — 679 Loans, net of unearned income (residential) (d) 3 — — 3 — — 3 Loans held for sale (residential) (b) 152 — 142 10 — — 152 Derivative assets - trading (b) 2,008 124 2,563 124 — $ (803 ) (f) 2,008 Fair value - OCI Securities available for sale (b) 20,807 — 20,798 $ 9 — — 20,807 Derivative assets - hedging (b)(g) 60 — 66 — — (6 ) (f) 60 Amortized cost Held-to-maturity securities (c) 9,638 — 10,012 — — — 10,012 Loans, net of unearned income (d) 101,836 — — 99,535 — — 99,535 Loans held for sale (b) 1,991 — — 1,991 — — 1,991 Other Cash and short-term investments (a) 4,938 4,938 — — — — 4,938 LIABILITIES (by measurement category) Fair value - net income Derivative liabilities - trading (b) $ 649 $ 117 $ 1,096 28 — $ (592 ) (f) $ 649 Fair value - OCI Derivative liabilities - hedging (b)(g) — — 3 — — (3 ) (f) — Amortized cost Time deposits (e) 10,253 — 10,336 — — — 10,336 Short-term borrowings (a) 7,050 124 6,926 — — — 7,050 Long-term debt (e) 13,732 13,144 715 — — — 13,859 Other Deposits with no stated maturity (a) 105,051 — 105,051 — — — 105,051 December 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) $ 1,040 — $ 1,040 — — — $ 1,040 Other investments (b) 605 — — $ 528 $ 77 — 605 Loans, net of unearned income (residential) (d) 4 — — 4 — — 4 Loans held for sale (residential) (b) 140 — 140 — — — 140 Derivative assets - trading (b) 715 $ 49 985 28 — $ (347 ) (f) 715 Fair value - OCI Securities available for sale (b) 21,843 — 21,832 11 — — 21,843 Derivative assets - hedging (b)(g) 65 — 191 — — (126 ) (f) 65 Amortized cost Held-to-maturity securities (c) 10,067 — 10,116 — — — 10,116 Loans, net of unearned income (d) 93,742 — — 92,641 — — 92,641 Loans held for sale (b) 1,194 — — 1,194 — — 1,194 Other Cash and short-term investments (a) 2,004 2,004 — — — — 2,004 LIABILITIES (by measurement category) Fair value - net income Derivative liabilities - trading (b) $ 194 $ 43 $ 461 9 — $ (319 ) (f) $ 194 Fair value - OCI Derivative liabilities - hedging (b)(g) 4 — 20 — — (16 ) (f) 4 Amortized cost Time deposits (e) 11,652 — 11,752 — — — 11,752 Short-term borrowings (a) 1,092 19 1,073 — — — 1,092 Long-term debt (e) 12,448 12,694 249 — — — 12,943 Other Deposits with no stated maturity (a) 100,218 — 100,218 — — — 100,218 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 105 of our 2019 Form 10-K.

Securities (Tables)

Securities (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 December 31, 2019 in millions Amortized Cost (a) 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 $ 340 $ 1 — $ 341 $ 334 — — $ 334 States and political subdivisions 4 — — 4 4 — — 4 Agency residential collateralized mortgage obligations 11,705 342 $ 2 12,045 12,772 $ 82 $ 71 12,783 Agency residential mortgage-backed securities 1,472 67 — 1,539 1,677 41 4 1,714 Agency commercial mortgage-backed securities 6,597 277 5 6,869 6,898 139 40 6,997 Other securities 8 1 — 9 7 4 — 11 Total securities available for sale $ 20,126 $ 688 $ 7 $ 20,807 $ 21,692 $ 266 $ 115 $ 21,843 HELD-TO-MATURITY SECURITIES Agency residential collateralized mortgage obligations $ 5,354 $ 157 — $ 5,511 $ 5,692 $ 23 $ 49 $ 5,666 Agency residential mortgage-backed securities 390 19 — 409 409 6 — 415 Agency commercial mortgage-backed securities 3,868 198 — 4,066 3,940 78 9 4,009 Asset-backed securities 11 — — 11 11 — — 11 Other securities 15 — — 15 15 — — 15 Total held-to-maturity securities $ 9,638 $ 374 — $ 10,012 $ 10,067 $ 107 $ 58 $ 10,116 (a) Amortized cost amounts exclude accrued interest receivable which is recorded within “other assets” on the balance sheet. At March 31, 2020 , accrued interest receivable on available for sale securities and held-to-maturity securities totaled $42 million and $19 million , respectively.
Schedule of Unrealized Loss on Investments	The following table summarizes available for sale securities in an unrealized loss position for which an allowance for credit losses has not been recorded as of March 31, 2020 , and December 31, 2019 . 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, 2020 Securities available for sale: Agency residential collateralized mortgage obligations $ 135 — (a) $ 416 $ 2 $ 551 $ 2 Agency residential mortgage-backed securities 10 — (a) 7 — (a) 17 — Agency commercial mortgage-backed securities 1,083 $ 5 — — 1,083 5 Other securities 1 — (a) — — 1 — Held-to-maturity securities: Agency residential collateralized mortgage obligations 8 — (a) 60 — (a) 68 — Asset-backed securities 2 — (a) — — 2 — Other securities 8 — (a) — — 8 — Total securities in an unrealized loss position $ 1,247 $ 5 $ 483 $ 2 $ 1,730 $ 7 December 31, 2019 Securities available for sale: U.S. Treasury, agencies, and corporations $ 30 — (b) $ 30 — (b) $ 60 — Agency residential collateralized mortgage obligations 3,432 $ 20 3,221 $ 51 6,653 $ 71 Agency residential mortgage-backed securities 33 — (b) 629 4 662 4 Agency commercial mortgage-backed securities 1,541 17 1,213 23 2,754 40 Held-to-maturity securities: Agency residential collateralized mortgage obligations 1,626 14 2,289 35 3,915 49 Agency residential mortgage-backed securities 56 — (b) — — 56 — Agency commercial mortgage-backed securities 518 9 — — 518 9 Asset-backed securities 11 — (b) — — 11 — Other securities 3 — (b) — — 3 — Total securities in an unrealized loss position $ 7,250 $ 60 $ 7,382 $ 113 $ 14,632 $ 173 (a) At March 31, 2020 , gross unrealized losses totaled less than $1 million for agency residential collateralized mortgage obligations, agency residential mortgage-backed securities, and other securities available for sale with a loss duration of less than 12 months. At March 31, 2020 , gross unrealized losses totaled less than $1 million for agency residential collateralized mortgage obligations, asset-backed securities, and other securities held-to-maturity with a loss duration of less than 12 months. At March 31, 2020 , gross unrealized losses totaled less than $1 million for agency residential mortgage-backed securities available for sale with a loss duration greater than 12 months or longer. At March 31, 2020 , gross unrealized losses totaled less than $1 million for agency residential collateralized mortgage obligations held-to-maturity with a loss duration greater than 12 months or longer. (b) At December 31, 2019 , gross unrealized losses totaled less than $1 million for U.S. Treasury, agencies, and corporations and agency residential mortgage-backed securities available for sale with a loss duration of less than 12 months. At December 31, 2019 , gross unrealized losses totaled less than $1 million for U.S. Treasury, Agencies, and Corporations securities available for sale with a loss duration greater than 12 months or longer. At December 31, 2019 , gross unrealized losses totaled less than $1 million for agency residential residential mortgage-backed securities, asset-backed securities, and other 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, 2020 Securities Available for Sale Held to Maturity Securities in millions Amortized Cost Fair Value Amortized Cost Fair Value Due in one year or less $ 571 $ 577 $ 60 $ 61 Due after one through five years 14,660 15,101 6,690 6,881 Due after five through ten years 4,893 5,127 2,888 3,070 Due after ten years 2 2 — — Total $ 20,126 $ 20,807 $ 9,638 $ 10,012

Derivatives and Hedging Activ_2

Derivatives and Hedging Activities (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 , and December 31, 2019 . 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, 2020 December 31, 2019 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 $ 25,804 $ 66 $ 3 $ 39,208 $ 191 $ 20 Derivatives not designated as hedging instruments: Interest rate 77,335 1,875 326 71,209 772 233 Foreign exchange 6,340 164 157 6,572 67 60 Commodity 4,556 704 690 5,324 208 200 Credit 959 11 28 427 1 10 Other (a) 5,408 57 40 3,337 14 10 Total 94,598 2,811 1,241 86,869 1,062 513 Netting adjustments (b) — (809 ) (595 ) — (473 ) (335 ) Net derivatives in the balance sheet 120,402 2,068 649 126,077 780 198 Other collateral (c) — (3 ) — — (2 ) (42 ) Net derivative amounts $ 120,402 $ 2,065 $ 649 $ 126,077 $ 778 $ 156 (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.
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, 2020 , and December 31, 2019 , related to cumulative basis adjustments for fair value hedges. March 31, 2020 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 $ 7,774 $ 533 December 31, 2019 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 $ 8,408 $ 240 (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 $9 million and $9 million at March 31, 2020 , and December 31, 2019 , respectively,
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, 2020 , and March 31, 2019 . Location and amount of net gains (losses) recognized in income on fair value and cash flow hedging relationships in millions Interest expense – long-term debt Interest income – loans Interest expense - deposits Other income Three months ended March 31, 2020 Total amounts presented in the consolidated statement of income $ (90 ) $ 1,026 $ (169 ) $ (88 ) Net gains (losses) on fair value hedging relationships Interest contracts Recognized on hedged items (294 ) — — — Recognized on derivatives designated as hedging instruments 311 — — — Net income (expense) recognized on fair value hedges $ 17 — — — Net gain (loss) on cash flow hedging relationships Interest contracts Realized gains (losses) (pre-tax) reclassified from AOCI into net income $ (1 ) $ 34 — — Net income (expense) recognized on cash flow hedges $ (1 ) $ 34 — — 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 ) — —
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, 2020 , and March 31, 2019 , 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 Three months ended March 31, 2020 Cash Flow Hedges Interest rate $ 562 Interest income — Loans $ 34 Interest rate (5 ) Interest expense — Long-term debt (1 ) Interest rate (30 ) Investment banking and debt placement fees — Total $ 527 $ 33 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 )
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, 2020 , and March 31, 2019 , and where they are recorded on the income statement. Three months ended March 31, 2020 Three months ended March 31, 2019 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 $ 11 — $ (9 ) $ 2 $ 8 — $ (2 ) $ 6 Foreign exchange 12 — — 12 10 — — 10 Commodity 2 — — 2 1 — — 1 Credit (16 ) — 1 (15 ) 1 — (7 ) (6 ) Other — 4 9 13 — — 1 1 Total net gains (losses) $ 9 4 $ 1 $ 14 $ 20 — $ (8 ) $ 12
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, 2020 December 31, 2019 Interest rate $ 1,744 $ 848 Foreign exchange 70 30 Commodity 559 95 Credit 8 — Other 57 14 Derivative assets before collateral 2,438 987 Less: Related collateral 370 207 Total derivative assets $ 2,068 $ 780
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, 2020 , and December 31, 2019 . The notional amount represents the amount that the seller could be required to pay. The payment/performance risk shown in the table represents a weighted average of the default probabilities for all reference entities in the respective portfolios. These default probabilities are implied from observed credit indices in the credit default swap market, which are mapped to reference entities based on Key’s internal risk rating. March 31, 2020 December 31, 2019 dollars in millions Notional Amount Average Term (Years) Payment / Performance Risk Notional Amount Average Term (Years) Payment / Performance Risk Other $ 358 14.62 27.09 % $ 134 14.30 14.56 % Total credit derivatives sold $ 358 — — $ 134 — —
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, 2020 , and December 31, 2019 . 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, 2020 , and December 31, 2019 , 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, 2020 , and December 31, 2019 . 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, 2020 December 31, 2019 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 $ 1 $ 1 $ 1 $ 1 Two rating downgrades 1 1 1 1 Three rating downgrades 1 1 1 1

Mortgage Servicing Assets (Tabl

Mortgage Servicing Assets (Tables)	3 Months Ended
	Mar. 31, 2020
Servicing Asset [Abstract]
Changes in Carrying Amount of Mortgage Servicing Assets	Changes in the carrying amount of commercial mortgage servicing assets are summarized as follows: Three months ended March 31, in millions 2020 2019 Balance at beginning of period $ 539 $ 502 Servicing retained from loan sales 24 18 Purchases 11 6 Amortization (29 ) (29 ) Temporary impairments (2 ) — Balance at end of period $ 543 $ 497 Fair value at end of period $ 655 $ 727 Changes in the carrying amount of residential mortgage servicing assets are summarized as follows: Three months ended March 31, in millions 2020 2019 Balance at beginning of period $ 46 $ 37 Servicing retained from loan sales 5 2 Purchases — — Amortization (2 ) (1 ) Temporary impairments (9 ) — Balance at end of period $ 40 $ 38 Fair value at end of period $ 41 $ 50
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, 2020 , and March 31, 2019 , along with the valuation techniques, are shown in the following table: dollars in millions March 31, 2020 March 31, 2019 Valuation Technique Significant Unobservable Input Range (Weighted Average) Discounted cash flow Expected defaults 0.97 - 2.00% (1.14%) 1.00 - 2.00% (1.14%) Residual cash flows discount rate 7.00 - 11.42% (9.24%) 7.00 - 15.00% (9.19%) Escrow earn rate 1.20 - 1.92% (1.67%) 2.22 - 3.70% (2.98%) Loan assumption rate 0.01 - 3.37% (1.32%) 0.00 - 3.18% (1.39%) March 31, 2020 , and March 31, 2019 , along with the valuation techniques, are shown in the following table: dollars in millions March 31, 2020 March 31, 2019 Valuation Technique Significant Unobservable Input Range (Weighted Average) Discounted cash flow Prepayment speed 10.50 - 55.60% (17.16%) 9.32 - 58.76% (9.93%) Discount rate 7.50 - 8.50% (7.52%) 7.50 - 10.00% (7.54%) Servicing cost $62 - $8,375 ($68.14) $62 - $4,375 ($68.23)

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Operating Lease, Lease Income	The components of equipment leasing income are summarized in the table below: Three months ended March 31, in millions 2020 2019 Sales-type and direct financing leases Interest income on lease receivable $ 28 $ 30 Interest income related to accretion of unguaranteed residual asset 3 3 Interest income on deferred fees and costs — — Total sales-type and direct financing lease income 31 33 Operating leases Operating lease income related to lease payments 34 33 Other operating leasing gains (4 ) 4 Total operating lease income and other leasing gains 30 37 Total lease income $ 61 $ 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 2020 2019 Sales-type and direct financing leases Interest income on lease receivable $ 28 $ 30 Interest income related to accretion of unguaranteed residual asset 3 3 Interest income on deferred fees and costs — — Total sales-type and direct financing lease income 31 33 Operating leases Operating lease income related to lease payments 34 33 Other operating leasing gains (4 ) 4 Total operating lease income and other leasing gains 30 37 Total lease income $ 61 $ 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 2020 2019 Sales-type and direct financing leases Interest income on lease receivable $ 28 $ 30 Interest income related to accretion of unguaranteed residual asset 3 3 Interest income on deferred fees and costs — — Total sales-type and direct financing lease income 31 33 Operating leases Operating lease income related to lease payments 34 33 Other operating leasing gains (4 ) 4 Total operating lease income and other leasing gains 30 37 Total lease income $ 61 $ 70

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 , and December 31, 2019 . 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 13 (“ Variable Interest Entities ”) beginning on page 146 of our 2019 Form 10-K. Unconsolidated VIEs in millions Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2020 LIHTC investments $ 6,401 $ 2,534 $ 1,823 December 31, 2019 LIHTC investments $ 6,405 $ 2,526 $ 1,846 March 31, 2020 , and December 31, 2019 . Unconsolidated VIEs in millions Total Assets Total Liabilities Maximum Exposure to Loss March 31, 2020 Indirect investments $ 12,221 $ 182 $ 84 December 31, 2019 Indirect investments $ 12,954 $ 205 $ 89

Securities Financing Activiti_2

Securities Financing Activities (Tables)	3 Months Ended
	Mar. 31, 2020
Banking and Thrift [Abstract]
Summarized Securities Financing Agreements	The following table summarizes our securities financing agreements at March 31, 2020 , and December 31, 2019 : March 31, 2020 December 31, 2019 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 $ 4 $ (4 ) — — $ 5 $ (5 ) — — Total $ 4 $ (4 ) — — $ 5 $ (5 ) — — Offsetting of financial liabilities: Repurchase agreements (c) $ 194 $ (6 ) $ (188 ) — $ 187 $ (7 ) $ (180 ) — Total $ 194 $ (6 ) $ (188 ) — $ 187 $ (7 ) $ (180 ) — (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.

Employee Benefits (Tables)

Employee Benefits (Tables)	3 Months Ended
	Mar. 31, 2020
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 18 (“ Employee Benefits ”) beginning on page 155 of our 2019 Form 10-K. Three months ended March 31, in millions 2020 2019 Interest cost on PBO $ 9 $ 11 Expected return on plan assets (10 ) (12 ) Amortization of losses 4 4 Settlement loss 4 — Net pension cost $ 7 $ 3

Trust Preferred Securities Is_2

Trust Preferred Securities Issued by Unconsolidated Subsidiaries (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 KeyCorp Capital I $ 156 $ 6 $ 162 2.649 % 2028 KeyCorp Capital II 114 4 118 6.875 2029 KeyCorp Capital III 149 4 153 7.750 2029 HNC Statutory Trust III 19 1 20 3.083 2035 Willow Grove Statutory Trust I 19 1 20 2.051 2036 HNC Statutory Trust IV 17 1 18 3.050 2037 Westbank Capital Trust II 8 — 8 3.306 2034 Westbank Capital Trust III 8 — 8 3.306 2034 Total $ 490 $ 17 $ 507 5.213 % — December 31, 2019 $ 466 $ 17 $ 483 5.214 % — (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 $77 million at March 31, 2020 , and $57 million at December 31, 2019 . 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 $77 million at March 31, 2020 , and $57 million at December 31, 2019 . 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) The interest rates for the trust preferred securities issued by KeyCorp Capital II and KeyCorp Capital III are fixed. The trust preferred securities issued by KeyCorp Capital I have a floating interest rate, equal to three-month LIBOR plus 74 basis points, that reprices quarterly. The trust preferred securities issued by HNC Statutory Trust III have a floating interest rate, equal to three-month LIBOR plus 140 basis points, that reprices quarterly. The trust preferred securities issued by Willow Grove Statutory Trust I have a floating interest rate, equal to three-month LIBOR plus 131 basis points, that reprices quarterly. The trust preferred securities issued by HNC Statutory Trust IV have a floating interest rate, equal to three-month LIBOR plus 128 basis points, that reprices quarterly. The trust preferred securities issued by Westbank Capital Trust II and Westbank Capital Trust III each have a floating interest rate, equal to three-month LIBOR plus 219 basis points, that reprices quarterly. The total interest rates are weighted-average rates.

Contingent Liabilities and Gu_2

Contingent Liabilities and Guarantees (Tables)	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Guarantees	The following table shows the types of guarantees that we had outstanding at March 31, 2020 . 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 “Contingencies and Guarantees” beginning on page 108 of our 2019 Form 10-K. March 31, 2020 Maximum Potential Undiscounted Future Payments Liability Recorded in millions Financial guarantees: Standby letters of credit $ 3,352 $ 72 Recourse agreement with FNMA 5,098 20 Residential mortgage reserve 1,906 7 Written put options (a) 2,598 102 Total $ 12,954 $ 201 (a) The maximum potential undiscounted future payments represent notional amounts of derivatives qualifying as guarantees.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
Changes in AOCI	Our changes in AOCI for the three months ended March 31, 2020 , and March 31, 2019 , 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, 2019 $ 115 $ 250 $ — $ (339 ) $ 26 Other comprehensive income before reclassification, net of income taxes 408 402 — — 810 Amounts reclassified from AOCI, net of income taxes (a) (3 ) (25 ) — 6 (22 ) Net current-period other comprehensive income, net of income taxes 405 377 — 6 788 Balance at March 31, 2020 $ 520 $ 627 $ — $ (333 ) $ 814 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 ) (a) See table below for details about these reclassifications.
Reclassifications Out of AOCI	Our reclassifications out of AOCI for the three months ended March 31, 2020 , and March 31, 2019 , are as follows: Three months ended March 31, Affected Line Item in the Statement Where Net Income is Presented in millions 2020 2019 Unrealized gains (losses) on available for sale securities Realized gains $ 4 — Other income 4 — Income (loss) from continuing operations before income taxes 1 — Income taxes $ 3 — Income (loss) from continuing operations Unrealized gains (losses) on derivative financial instruments Interest rate $ 34 $ (24 ) Interest income — Loans Interest rate (1 ) (1 ) Interest expense — Long-term debt 33 (25 ) Income (loss) from continuing operations before income taxes 8 (6 ) Income taxes $ 25 (19 ) Income (loss) from continuing operations Net pension and postretirement benefit costs Amortization of losses $ (4 ) $ (4 ) Other expense Settlement loss (4 ) — Other expense (8 ) (4 ) Income (loss) from continuing operations before income taxes (2 ) (1 ) Income taxes $ (6 ) (3 ) Income (loss) from continuing operations

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2020
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 2020 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 Fixed Rate Perpetual Non-Cumulative Series G 450 450,000 1 1,000 1/40th 25 .351563

Business Segment Reporting (Tab

Business Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 , and March 31, 2019 . Three months ended March 31, Consumer Bank Commercial Bank Other Total Key dollars in millions 2020 2019 2020 2019 2020 2019 2020 2019 SUMMARY OF OPERATIONS Net interest income (TE) $ 590 $ 591 $ 410 $ 402 $ (11 ) $ (8 ) $ 989 $ 985 Noninterest income 230 214 219 300 28 22 477 536 Total revenue (TE) (a) 820 805 629 702 17 14 1,466 1,521 Provision for credit losses 140 45 214 16 5 1 359 62 Depreciation and amortization expense 21 23 36 29 35 36 92 88 Other noninterest expense 522 517 317 344 — 14 839 875 Income (loss) from continuing operations before income taxes (TE) 137 220 62 313 (23 ) (37 ) 176 496 Allocated income taxes and TE adjustments 32 52 (8 ) 63 7 (25 ) 31 90 Income (loss) from continuing operations 105 168 70 250 (30 ) (12 ) 145 406 Income (loss) from discontinued operations, net of taxes — — — — 1 1 1 1 Net income (loss) 105 168 70 250 (29 ) (11 ) 146 407 Less: Net income (loss) attributable to noncontrolling interests — — — — — — — — Net income (loss) attributable to Key $ 105 $ 168 $ 70 $ 250 $ (29 ) $ (11 ) $ 146 $ 407 AVERAGE BALANCES (b) Loans and leases $ 35,197 $ 31,321 $ 60,082 $ 57,267 $ 895 $ 1,061 $ 96,174 $ 89,649 Total assets (a) 38,460 34,732 69,383 64,873 38,385 40,515 146,228 140,120 Deposits 73,320 71,288 36,058 34,417 950 1,871 110,328 107,576 OTHER FINANCIAL DATA Net loan charge-offs (b) $ 43 $ 34 $ 40 $ 30 $ 1 — $ 84 $ 64 Return on average allocated equity (b) 12.18 % 21.27 % 6.00 % 22.60 % (1.33 )% (.61 )% 3.39 % 10.49 % Return on average allocated equity 12.18 21.27 6.00 22.60 (1.29 ) (.56 ) 3.41 10.51 Average full-time equivalent employees (c) 8,907 9,622 2,069 2,370 5,553 5,562 16,529 17,554 (a) Substantially all revenue generated by our major business segments is derived from clients that reside in the United States. Substantially all long-lived assets, including premises and equipment, capitalized software, and goodwill held by our major business segments, are located in the United States. (b) From continuing operations. (c) The number of average full-time equivalent employees was not adjusted for discontinued operations.

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Mar. 31, 2020
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, 2020 , and March 31, 2019 . Three months ended March 31, 2020 Three months ended March 31, 2019 dollars in millions Consumer Bank Commercial Bank Total Contract Revenue Consumer Bank Commercial Bank Total Contract Revenue NONINTEREST INCOME Trust and investment services income $ 93 $ 19 $ 112 $ 85 $ 15 $ 100 Investment banking and debt placement fees — 47 47 — 45 45 Services charges on deposit accounts 56 28 84 54 27 81 Cards and payments income 38 26 64 37 26 63 Other noninterest income 2 — 2 3 — 3 Total revenue from contracts with customers $ 189 $ 120 $ 309 $ 179 $ 113 $ 292 Other noninterest income (a) $ 140 $ 222 Noninterest income from Other (b) 28 22 Total noninterest income $ 477 $ 536 (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.

Basis of Presentation and Acc_4

Basis of Presentation and Accounting Policies - Narrative (Details) $ in Millions	Jan. 01, 2020USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to amortized cost basis of PCD loans	$ 4
Noncredit discount on PCD loans	15
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect from changes in accounting principle	(230)	[1]
Retained Earnings [Member] | Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect from changes in accounting principle	230
Deferred taxes recognized on adoption	$ 71
[1]	Includes the impact of implementing ASU 2016-13, Financial Instruments - Credit Losses (ASC 326): Measurement of Credit Losses on Financial Instruments.

Basis of Presentation and Acc_5

Basis of Presentation and Accounting Policies - Measurement of Credit Losses (Details) - USD ($) $ in Millions	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	$ 1,359	$ 1,104	$ 900	$ 883	$ 883
Total ALLL	1,402	1,145	910	896	897
Accrued expense and other liabilities			75
Total allowance for credit losses			985
Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	818	627	751	737	743
Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	541	477	149	146	140
Commercial and Industrial [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	542	410	551	530	532
Commercial Mortgage Backed Securities [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses			143
Construction Loans [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	25	15	22	28	33
Commercial Lease Financing [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	44	43	35	35	36
Residential Mortgage [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses			7
Home Equity Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	184	178	31	36	35
Consumer Direct Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	116	97	34	33	30
Commercial Credit Card [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses			47
Consumer Indirect Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	48	36	30	22	20
As Reported Under ASC 326
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		1,104
Total ALLL		1,145
Accrued expense and other liabilities		145
Total allowance for credit losses		1,290
As Reported Under ASC 326 | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		627
As Reported Under ASC 326 | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		477
As Reported Under ASC 326 | Commercial and Industrial [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		410
As Reported Under ASC 326 | Commercial Mortgage Backed Securities [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		159
As Reported Under ASC 326 | Construction Loans [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		15
As Reported Under ASC 326 | Commercial Lease Financing [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		43
As Reported Under ASC 326 | Residential Mortgage [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		84
As Reported Under ASC 326 | Home Equity Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		178
As Reported Under ASC 326 | Consumer Direct Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		97
As Reported Under ASC 326 | Commercial Credit Card [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		82
As Reported Under ASC 326 | Consumer Indirect Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		36
Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		204
Total ALLL		235
Accrued expense and other liabilities		70
Total allowance for credit losses		305
Impact of ASC 326 Adoption | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		(124)
Impact of ASC 326 Adoption | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		328
Impact of ASC 326 Adoption | Commercial and Industrial [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		(141)
Impact of ASC 326 Adoption | Commercial Mortgage Backed Securities [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		16
Impact of ASC 326 Adoption | Construction Loans [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		(7)
Impact of ASC 326 Adoption | Commercial Lease Financing [Member] | Commercial Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		8
Impact of ASC 326 Adoption | Residential Mortgage [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		77
Impact of ASC 326 Adoption | Home Equity Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		147
Impact of ASC 326 Adoption | Consumer Direct Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		63
Impact of ASC 326 Adoption | Commercial Credit Card [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		35
Impact of ASC 326 Adoption | Consumer Indirect Loans [Member] | Consumer Loans [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		6
Discontinued Operations [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses	$ 43	41	$ 10	$ 13	$ 14
Discontinued Operations [Member] | As Reported Under ASC 326
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		41
Discontinued Operations [Member] | Impact of ASC 326 Adoption
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		$ 31

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, 2020	Mar. 31, 2019
EARNINGS
Income (loss) from continuing operations		$ 145	$ 406
Less: Net income (loss) attributable to noncontrolling interests		0	0
Income (loss) from continuing operations attributable to Key		145	406
Less: Dividends on Preferred Stock		27	20
Income (loss) from continuing operations attributable to Key common shareholders		118	386
Income (loss) from discontinued operations, net of taxes		1	1
Net income (loss) attributable to Key common shareholders		$ 119	$ 387
WEIGHTED-AVERAGE COMMON SHARES
Weighted-average common shares outstanding (000) (in shares)		967,446	1,006,717
Effect of common share options and other stock awards (in shares)		8,664	9,787
Weighted-average common shares and potential common shares outstanding (in shares)	[1]	976,110	1,016,504
EARNINGS PER COMMON SHARE
Income (loss) from continuing operations attributable to Key common shareholders (in usd per share)		$ 0.12	$ 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]	0.12	0.38
Income (loss) from continuing operations attributable to Key common shareholders - assuming dilution (in usd per share)		0.12	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]	$ 0.12	$ 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, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 103,198	$ 94,646
Accrued interest	241	244
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	75,918	68,032
Accrued interest	142
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	27,280	26,614
Accrued interest	99
Commercial and Industrial [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	55,983	48,295
Commercial Mortgage [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	13,548	13,491
Construction Loans [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,710	1,558
Commercial Credit Card [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	143	144
Commercial Credit Card [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,041	1,130
Commercial Real Estate [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	15,258	15,049
Commercial Lease Financing [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	4,677	4,688
Real Estate - Residential Mortgage [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	7,498	7,023
Home Equity Loans [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	10,103	10,274
Residential - Prime Loans [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	17,601	17,297
Consumer Direct Loans [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,833	3,513
Consumer Credit Card [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	1,041	1,130
Consumer Indirect Loans [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	4,805	4,674
Collateral Pledged [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	14	15
Education Lending [Member] | Discontinued Operations [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 821	$ 865

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, 2020	Mar. 31, 2019	Jan. 01, 2020	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 900	$ 883
Provision	339	64
Charge-offs	(101)	(87)
Recoveries	17	23
Ending balance	1,359	883
Total ALLL, including discontinued operations	1,402	896	$ 1,145	$ 910	$ 897
Total provision, including discontinued operations	342	66
Total charge-offs, including discontinued operations	103	91
Total recoveries, including discontinued operations	18	24
Provision for losses on lending-related commitments	20	(2)
Commercial Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	751	743
Provision	250	35
Charge-offs	(65)	(53)
Recoveries	6	12
Ending balance	818	737
Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	149	140
Provision	89	29
Charge-offs	(36)	(34)
Recoveries	11	11
Ending balance	541	146
Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	551	532
Provision	187	24
Charge-offs	(60)	(36)
Recoveries	5	10
Ending balance	542	530
Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		142
Provision	50	6
Charge-offs	(3)	(5)
Recoveries	1	1
Ending balance	207	144
Construction Loans [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	22	33
Provision	10	(1)
Charge-offs	0	(4)
Recoveries	0	0
Ending balance	25	28
Commercial Real Estate [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		175
Provision	60	5
Charge-offs	(3)	(9)
Recoveries	1	1
Ending balance	232	172
Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	35	36
Provision	3	6
Charge-offs	(2)	(8)
Recoveries	0	1
Ending balance	44	35
Real Estate - Residential Mortgage [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		7
Provision	5	1
Charge-offs	0	(1)
Recoveries	0	1
Ending balance	89	8
Home Equity Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	31	35
Provision	8	3
Charge-offs	(4)	(4)
Recoveries	2	2
Ending balance	184	36
Consumer Direct Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	34	30
Provision	29	12
Charge-offs	(12)	(10)
Recoveries	2	1
Ending balance	116	33
Credit Cards [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance		48
Provision	31	8
Charge-offs	(11)	(11)
Recoveries	2	2
Ending balance	104	47
Consumer Indirect Loans [Member] | Consumer Loans [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	30	20
Provision	16	5
Charge-offs	(9)	(8)
Recoveries	5	5
Ending balance	48	22
Discontinued Operations [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	10	14
Provision	3	2
Charge-offs	(2)	(4)
Recoveries	1	1
Ending balance	$ 43	$ 13

Asset Quality - Additional Info

Asset Quality - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020USD ($)SecurityLoan	Mar. 31, 2019USD ($)SecurityLoan	Dec. 31, 2019USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest	$ 241		$ 244
Percentage of carrying amount of our commercial nonperforming loans outstanding	75.00%
Percentage of nonperforming loans outstanding face value	78.00%
Percentage of loans held for sale and other nonperforming assets	87.00%
Net reduction to interest income	$ 6	$ 8
Commitments outstanding to lend additional funds to borrowers (less than $1 million)	3		5
Financial receivable, modifications, subsequent default, recorded investment	2	$ 2
Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest	142
Increase in commercial loans	$ 7,900
Increase in commercial loans, percent	11.60%
Number of loans | SecurityLoan	0	0
Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest	$ 99
Number of loans | SecurityLoan	84	74
Continuing Operations [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in ALLL	$ 191
Increase in ALLL, percent	30.50%
Continuing Operations [Member] | Consumer Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase in ALLL	$ 64
Increase in ALLL, percent	13.40%
Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonperforming loans on nonaccrual status with no allowance	$ 407
Real Estate - Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financial receivable, modifications, subsequent default, recorded investment	$ 71		$ 97

Asset Quality - Commerical Cred

Asset Quality - Commerical Credit Exposure (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 103,198	$ 94,646
Accrued interest	241	244
Commercial Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	4,218
2018	12,489
2017	9,211
2016	5,887
2015	4,163
Prior	9,434
Revolving Loans Amortized Cost Basis	30,303
Revolving Loans Converted to Term Loans Amortized Cost Basis	213
Total	75,918	68,032
Accrued interest	142
Commercial Loans [Member] | Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	3,143
2018	7,278
2017	5,642
2016	3,730
2015	2,659
Prior	4,178
Revolving Loans Amortized Cost Basis	29,188
Revolving Loans Converted to Term Loans Amortized Cost Basis	165
Total	55,983	48,295
Commercial Loans [Member] | Commercial and Industrial [Member] | Criticized Accruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	6
2018	56
2017	129
2016	177
2015	110
Prior	169
Revolving Loans Amortized Cost Basis	1,004
Revolving Loans Converted to Term Loans Amortized Cost Basis	16
Total	1,667
Commercial Loans [Member] | Commercial and Industrial [Member] | Criticized Nonaccruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	25
2017	16
2016	36
2015	8
Prior	62
Revolving Loans Amortized Cost Basis	126
Revolving Loans Converted to Term Loans Amortized Cost Basis	4
Total	277
Commercial Loans [Member] | Commercial and Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	3,137
2018	7,197
2017	5,497
2016	3,517
2015	2,541
Prior	3,947
Revolving Loans Amortized Cost Basis	28,058
Revolving Loans Converted to Term Loans Amortized Cost Basis	145
Total	54,039
Commercial Loans [Member] | Commercial Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	726
2018	3,352
2017	2,096
2016	1,121
2015	1,052
Prior	4,056
Revolving Loans Amortized Cost Basis	1,100
Revolving Loans Converted to Term Loans Amortized Cost Basis	45
Total	13,548	13,491
Commercial Loans [Member] | Commercial Mortgage [Member] | Criticized Accruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	6
2017	21
2016	51
2015	40
Prior	205
Revolving Loans Amortized Cost Basis	7
Revolving Loans Converted to Term Loans Amortized Cost Basis	2
Total	332
Commercial Loans [Member] | Commercial Mortgage [Member] | Criticized Nonaccruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	1
2016	3
2015	1
Prior	77
Revolving Loans Amortized Cost Basis	4
Revolving Loans Converted to Term Loans Amortized Cost Basis	1
Total	87
Commercial Loans [Member] | Commercial Mortgage [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	726
2018	3,346
2017	2,074
2016	1,067
2015	1,011
Prior	3,774
Revolving Loans Amortized Cost Basis	1,089
Revolving Loans Converted to Term Loans Amortized Cost Basis	42
Total	13,129
Commercial Loans [Member] | Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	36
2018	509
2017	703
2016	326
2015	92
Prior	26
Revolving Loans Amortized Cost Basis	15
Revolving Loans Converted to Term Loans Amortized Cost Basis	3
Total	1,710	1,558
Commercial Loans [Member] | Construction Loans [Member] | Criticized Accruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	0
2016	0
2015	23
Prior	3
Revolving Loans Amortized Cost Basis	1
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	27
Commercial Loans [Member] | Construction Loans [Member] | Criticized Nonaccruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	0
2016	0
Prior	2
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	2
Commercial Loans [Member] | Construction Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	36
2018	509
2017	703
2016	326
2015	69
Prior	21
Revolving Loans Amortized Cost Basis	14
Revolving Loans Converted to Term Loans Amortized Cost Basis	3
Total	1,681
Commercial Loans [Member] | Commercial Lease Financing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	313
2018	1,350
2017	770
2016	710
2015	360
Prior	1,174
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	4,677	$ 4,688
Commercial Loans [Member] | Commercial Lease Financing [Member] | Criticized Accruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	2
2017	6
2016	12
2015	12
Prior	12
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	44
Commercial Loans [Member] | Commercial Lease Financing [Member] | Criticized Nonaccruing [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	1
2016	1
2015	3
Prior	0
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	5
Commercial Loans [Member] | Commercial Lease Financing [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	313
2018	1,348
2017	763
2016	697
2015	345
Prior	1,162
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	$ 4,628

Asset Quality Asset Quality - C

Asset Quality Asset Quality - Consumer Credit Exposure (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 103,198	$ 94,646
Accrued interest	241	244
Consumer Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	2,353
2018	7,287
2017	2,206
2016	1,537
2015	1,550
Prior	4,417
Revolving Loans Amortized Cost Basis	7,184
Revolving Loans Converted to Term Loans Amortized Cost Basis	746
Total	27,280	26,614
Accrued interest	99
Consumer Loans [Member] | Real Estate - Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	819
2018	2,488
2017	498
2016	463
2015	851
Prior	2,379
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	7,498	7,023
Consumer Loans [Member] | Real Estate - Residential Mortgage [Member] | FICO Score, Greater Than 750 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	648
2018	1,923
2017	344
2016	368
2015	686
Prior	1,662
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	5,631
Consumer Loans [Member] | Real Estate - Residential Mortgage [Member] | FICO Score, 660 to 749 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	166
2018	525
2017	123
2016	76
2015	127
Prior	431
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	1,448
Consumer Loans [Member] | Real Estate - Residential Mortgage [Member] | FICO Score, Less than 660 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	5
2018	36
2017	28
2016	12
2015	33
Prior	223
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	337
Consumer Loans [Member] | Real Estate - Residential Mortgage [Member] | FICO Score, No Score [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	4
2017	3
2016	7
2015	5
Prior	63
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	82
Consumer Loans [Member] | Home Equity Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	236
2018	831
2017	392
2016	420
2015	385
Prior	1,637
Revolving Loans Amortized Cost Basis	5,456
Revolving Loans Converted to Term Loans Amortized Cost Basis	746
Total	10,103	10,274
Consumer Loans [Member] | Home Equity Loans [Member] | FICO Score, Greater Than 750 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	168
2018	475
2017	208
2016	231
2015	219
Prior	972
Revolving Loans Amortized Cost Basis	2,898
Revolving Loans Converted to Term Loans Amortized Cost Basis	444
Total	5,615
Consumer Loans [Member] | Home Equity Loans [Member] | FICO Score, 660 to 749 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	58
2018	296
2017	142
2016	154
2015	128
Prior	476
Revolving Loans Amortized Cost Basis	1,902
Revolving Loans Converted to Term Loans Amortized Cost Basis	228
Total	3,384
Consumer Loans [Member] | Home Equity Loans [Member] | FICO Score, Less than 660 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	5
2018	57
2017	41
2016	34
2015	38
Prior	186
Revolving Loans Amortized Cost Basis	648
Revolving Loans Converted to Term Loans Amortized Cost Basis	71
Total	1,080
Consumer Loans [Member] | Home Equity Loans [Member] | FICO Score, No Score [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	5
2018	3
2017	1
2016	1
2015	0
Prior	3
Revolving Loans Amortized Cost Basis	8
Revolving Loans Converted to Term Loans Amortized Cost Basis	3
Total	24
Consumer Loans [Member] | Consumer Direct Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	643
2018	1,826
2017	335
2016	122
2015	73
Prior	147
Revolving Loans Amortized Cost Basis	687
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	3,833	3,513
Consumer Loans [Member] | Consumer Direct Loans [Member] | FICO Score, Greater Than 750 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	359
2018	1,283
2017	157
2016	48
2015	26
Prior	74
Revolving Loans Amortized Cost Basis	137
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	2,084
Consumer Loans [Member] | Consumer Direct Loans [Member] | FICO Score, 660 to 749 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	111
2018	429
2017	117
2016	38
2015	23
Prior	44
Revolving Loans Amortized Cost Basis	304
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	1,066
Consumer Loans [Member] | Consumer Direct Loans [Member] | FICO Score, Less than 660 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	3
2018	47
2017	31
2016	13
2015	7
Prior	14
Revolving Loans Amortized Cost Basis	113
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	228
Consumer Loans [Member] | Consumer Direct Loans [Member] | FICO Score, No Score [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	170
2018	67
2017	30
2016	23
2015	17
Prior	15
Revolving Loans Amortized Cost Basis	133
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	455
Consumer Loans [Member] | Commercial Credit Card [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	0
2016	0
2015	0
Prior	0
Revolving Loans Amortized Cost Basis	1,041
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	1,041	1,130
Consumer Loans [Member] | Commercial Credit Card [Member] | FICO Score, Greater Than 750 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	0
2016	0
2015	0
Prior	0
Revolving Loans Amortized Cost Basis	459
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	459
Consumer Loans [Member] | Commercial Credit Card [Member] | FICO Score, 660 to 749 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	0
2016	0
2015	0
Prior	0
Revolving Loans Amortized Cost Basis	459
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	459
Consumer Loans [Member] | Commercial Credit Card [Member] | FICO Score, Less than 660 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	0
2016	0
2015	0
Prior	0
Revolving Loans Amortized Cost Basis	122
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	122
Consumer Loans [Member] | Commercial Credit Card [Member] | FICO Score, No Score [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	0
2018	0
2017	0
2016	0
2015	0
Prior	0
Revolving Loans Amortized Cost Basis	1
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	1
Consumer Loans [Member] | Consumer Indirect Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	655
2018	2,142
2017	981
2016	532
2015	241
Prior	254
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	4,805	$ 4,674
Consumer Loans [Member] | Consumer Indirect Loans [Member] | FICO Score, Greater Than 750 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	383
2018	1,066
2017	476
2016	278
2015	124
Prior	114
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	2,441
Consumer Loans [Member] | Consumer Indirect Loans [Member] | FICO Score, 660 to 749 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	206
2018	816
2017	351
2016	165
2015	70
Prior	91
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	1,699
Consumer Loans [Member] | Consumer Indirect Loans [Member] | FICO Score, Less than 660 [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	38
2018	259
2017	154
2016	89
2015	47
Prior	48
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	635
Consumer Loans [Member] | Consumer Indirect Loans [Member] | FICO Score, No Score [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2019	28
2018	1
2017	0
2016	0
2015	0
Prior	1
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term Loans Amortized Cost Basis	0
Total	$ 30

Asset Quality - Aging Analysis

Asset Quality - Aging Analysis of Past Due and Current Loans (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Current	$ 102,045	$ 93,197
Days Past Due	1,153	1,003
Purchased Credit Impaired		446
Total	103,198	94,646
Accrued interest	241	244
Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	75,182	67,224
Days Past Due	736	635
Purchased Credit Impaired		173
Total	75,918	68,032
Accrued interest	142
Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	26,863	25,973
Days Past Due	417	368
Purchased Credit Impaired		273
Total	27,280	26,614
Accrued interest	99
Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	55,455	47,768
Days Past Due	528	479
Purchased Credit Impaired		48
Total	55,983	48,295
Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	13,381	13,258
Days Past Due	167	109
Purchased Credit Impaired		124
Total	13,548	13,491
Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	1,702	1,551
Days Past Due	8	6
Purchased Credit Impaired		1
Total	1,710	1,558
Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	15,083	14,809
Days Past Due	175	115
Purchased Credit Impaired		125
Total	15,258	15,049
Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	4,644	4,647
Days Past Due	33	41
Purchased Credit Impaired		0
Total	4,677	4,688
Real Estate - Residential Mortgage [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	7,397	6,705
Days Past Due	101	61
Purchased Credit Impaired		257
Total	7,498	7,023
Home Equity Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	9,910	10,071
Days Past Due	193	190
Purchased Credit Impaired		13
Total	10,103	10,274
Consumer Direct Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	3,801	3,484
Days Past Due	32	26
Purchased Credit Impaired		3
Total	3,833	3,513
Commercial Credit Card [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Total	143	144
Commercial Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	1,015	1,104
Days Past Due	26	26
Purchased Credit Impaired		0
Total	1,041	1,130
Consumer Indirect Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Current	4,740	4,609
Days Past Due	65	65
Purchased Credit Impaired		0
Total	4,805	4,674
30-59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	246	228
30-59 Days Past Due [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	146	143
30-59 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	100	85
30-59 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	100	110
30-59 Days Past Due [Member] | Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	28	8
30-59 Days Past Due [Member] | Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	4	3
30-59 Days Past Due [Member] | Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	32	11
30-59 Days Past Due [Member] | Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	14	22
30-59 Days Past Due [Member] | Real Estate - Residential Mortgage [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	10	7
30-59 Days Past Due [Member] | Home Equity Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	34	30
30-59 Days Past Due [Member] | Consumer Direct Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	17	10
30-59 Days Past Due [Member] | Commercial Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	7	6
30-59 Days Past Due [Member] | Consumer Indirect Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	32	32
60-89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	147	101
60-89 Days Past Due [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	117	68
60-89 Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	30	33
60-89 Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	78	52
60-89 Days Past Due [Member] | Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	34	5
60-89 Days Past Due [Member] | Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	0	0
60-89 Days Past Due [Member] | Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	34	5
60-89 Days Past Due [Member] | Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	5	11
60-89 Days Past Due [Member] | Real Estate - Residential Mortgage [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	2	5
60-89 Days Past Due [Member] | Home Equity Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	11	10
60-89 Days Past Due [Member] | Consumer Direct Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	4	5
60-89 Days Past Due [Member] | Commercial Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	5	5
60-89 Days Past Due [Member] | Consumer Indirect Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	8	8
90 and Greater Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	128	97
90 and Greater Days Past Due [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	102	69
90 and Greater Days Past Due [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	26	28
90 and Greater Days Past Due [Member] | Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	73	53
90 and Greater Days Past Due [Member] | Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	18	13
90 and Greater Days Past Due [Member] | Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	2	1
90 and Greater Days Past Due [Member] | Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	20	14
90 and Greater Days Past Due [Member] | Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	9	2
90 and Greater Days Past Due [Member] | Real Estate - Residential Mortgage [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	0	1
90 and Greater Days Past Due [Member] | Home Equity Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	5	5
90 and Greater Days Past Due [Member] | Consumer Direct Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	7	7
90 and Greater Days Past Due [Member] | Commercial Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	11	12
90 and Greater Days Past Due [Member] | Consumer Indirect Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	3	3
Nonperforming Financial Instruments [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	632	577
Nonperforming Financial Instruments [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	371	355
Nonperforming Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	261	222
Nonperforming Financial Instruments [Member] | Commercial and Industrial [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	277	264
Nonperforming Financial Instruments [Member] | Commercial Mortgage [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	87	83
Nonperforming Financial Instruments [Member] | Commercial Real Estate: Construction [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	2	2
Nonperforming Financial Instruments [Member] | Commercial Real Estate Loans [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	89	85
Nonperforming Financial Instruments [Member] | Commercial Lease Financing [Member] | Commercial Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	5	6
Nonperforming Financial Instruments [Member] | Real Estate - Residential Mortgage [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	89	48
Nonperforming Financial Instruments [Member] | Home Equity Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	143	145
Nonperforming Financial Instruments [Member] | Consumer Direct Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	4	4
Nonperforming Financial Instruments [Member] | Commercial Credit Card [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	3	3
Nonperforming Financial Instruments [Member] | Consumer Indirect Loans [Member] | Consumer Loans [Member]
Financing Receivable, Past Due [Line Items]
Days Past Due	$ 22	$ 22

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, 2020	Mar. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Total commercial and consumer TDRs	$ 18	$ 13
Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Interest rate reduction	9	4
Other	9	9
Total	$ 18	$ 13

Asset Quality - Summary of Post

Asset Quality - Summary of Post-Modification Outstanding Recorded Investment TDRs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Financing Receivables, Modifications, Rollforward [Roll Forward]
Balance at beginning of the period	$ 347	$ 399
Additions	17	14
Payments	(18)	(39)
Charge-offs	(6)	(9)
Balance at end of period	$ 340	$ 365

Asset Quality - Breakdown of No

Asset Quality - Breakdown of Nonperforming TDRs by Loans Category (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020USD ($)SecurityLoan	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)SecurityLoan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	6,310		6,212
Pre-modification Outstanding Recorded Investment	$ 423		$ 425
Post-modification Outstanding Recorded Investment	$ 340		$ 347
Prior-Year Accruing [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	3,860		3,590
Pre-modification Outstanding Recorded Investment	$ 217		$ 211
Post-modification Outstanding Recorded Investment	$ 169		$ 164
Prior-Year Accruing [Member] | Commercial Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	6		7
Pre-modification Outstanding Recorded Investment	$ 31		$ 30
Post-modification Outstanding Recorded Investment	$ 25		$ 25
Prior-Year Accruing [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	3,854		3,583
Pre-modification Outstanding Recorded Investment	$ 186		$ 181
Post-modification Outstanding Recorded Investment	$ 144		$ 139
Nonperforming Financial Instruments [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	2,450		2,622
Pre-modification Outstanding Recorded Investment	$ 206		$ 214
Post-modification Outstanding Recorded Investment	$ 171		$ 183
Nonperforming Financial Instruments [Member] | Commercial Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	42		57
Pre-modification Outstanding Recorded Investment	$ 129		$ 136
Post-modification Outstanding Recorded Investment	$ 101		$ 111
Nonperforming Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	2,408		2,565
Pre-modification Outstanding Recorded Investment	$ 77		$ 78
Post-modification Outstanding Recorded Investment	$ 70		$ 72
Commercial and Industrial [Member] | Prior-Year Accruing [Member] | Commercial Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	5		6
Pre-modification Outstanding Recorded Investment	$ 30		$ 30
Post-modification Outstanding Recorded Investment	$ 25		$ 25
Commercial and Industrial [Member] | Nonperforming Financial Instruments [Member] | Commercial Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	35		51
Pre-modification Outstanding Recorded Investment	$ 65		$ 72
Post-modification Outstanding Recorded Investment	$ 43		$ 53
Commercial Mortgage [Member] | Prior-Year Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	1		1
Pre-modification Outstanding Recorded Investment	$ 1		$ 0
Post-modification Outstanding Recorded Investment	$ 0	$ 0
Commercial Mortgage [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	7		6
Pre-modification Outstanding Recorded Investment	$ 64		$ 64
Post-modification Outstanding Recorded Investment	$ 58	$ 58
Commercial Real Estate Loans [Member] | Prior-Year Accruing [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	1		1
Pre-modification Outstanding Recorded Investment	$ 1		$ 0
Post-modification Outstanding Recorded Investment	$ 0		$ 0
Commercial Real Estate Loans [Member] | Nonperforming Financial Instruments [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	7		6
Pre-modification Outstanding Recorded Investment	$ 64		$ 64
Post-modification Outstanding Recorded Investment	$ 58		$ 58
Real Estate - Residential Mortgage [Member] | Prior-Year Accruing [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	489		493
Pre-modification Outstanding Recorded Investment	$ 36		$ 37
Post-modification Outstanding Recorded Investment	$ 31		$ 31
Real Estate - Residential Mortgage [Member] | Nonperforming Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	194		181
Pre-modification Outstanding Recorded Investment	$ 16		$ 13
Post-modification Outstanding Recorded Investment	$ 14		$ 11
Home Equity Loans [Member] | Prior-Year Accruing [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	1,839		1,751
Pre-modification Outstanding Recorded Investment	$ 110		$ 104
Post-modification Outstanding Recorded Investment	$ 90		$ 84
Home Equity Loans [Member] | Nonperforming Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	625		713
Pre-modification Outstanding Recorded Investment	$ 38		$ 42
Post-modification Outstanding Recorded Investment	$ 37		$ 41
Consumer Direct Loans [Member] | Prior-Year Accruing [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	165		139
Pre-modification Outstanding Recorded Investment	$ 4		$ 4
Post-modification Outstanding Recorded Investment	$ 3		$ 3
Consumer Direct Loans [Member] | Nonperforming Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	168		172
Pre-modification Outstanding Recorded Investment	$ 2		$ 2
Post-modification Outstanding Recorded Investment	$ 2		$ 2
Consumer Credit Card [Member] | Prior-Year Accruing [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	577		486
Pre-modification Outstanding Recorded Investment	$ 3		$ 3
Post-modification Outstanding Recorded Investment	$ 1		$ 1
Consumer Credit Card [Member] | Nonperforming Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	324		368
Pre-modification Outstanding Recorded Investment	$ 2		$ 2
Post-modification Outstanding Recorded Investment	$ 2		$ 2
Consumer Indirect Loans [Member] | Prior-Year Accruing [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	784		714
Pre-modification Outstanding Recorded Investment	$ 33		$ 33
Post-modification Outstanding Recorded Investment	$ 19		$ 20
Consumer Indirect Loans [Member] | Nonperforming Financial Instruments [Member] | Consumer Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | SecurityLoan	1,097		1,131
Pre-modification Outstanding Recorded Investment	$ 19		$ 19
Post-modification Outstanding Recorded Investment	$ 15		$ 16

Asset Quality - Changes in Liab

Asset Quality - Changes in Liability for Credit Losses on Lending Related Commitments (Details) - USD ($) $ in Millions	Jan. 01, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at the end of the prior period	$ 68	$ 68	$ 64
Liability for credit losses on contingent guarantees at the end of the prior period				$ 7	$ 0
Cumulative effect from changes in accounting principle	66
Balance at beginning of period	141	161	62	$ 68	$ 64
Provision (credit) for losses on off balance sheet exposures		20	(2)
Balance at end of period	141	$ 161	$ 62
Other Financial Assets [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Cumulative effect from changes in accounting principle	$ 4

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	$ 795,000,000	$ 1,040,000,000
Securities available for sale	20,807,000,000	21,843,000,000
Loans, net of unearned income of $575 and $603	103,198,000,000	94,646,000,000
Loans held for sale (residential)		0
Derivative assets, netting adjustments	(809,000,000)		$ (473,000,000)
Total derivative assets	2,068,000,000	780,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, netting adjustments	(595,000,000)		$ (335,000,000)
US Treasury and Government [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	341,000,000	334,000,000
US States and Political Subdivisions Debt Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	4,000,000	4,000,000
Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	9,000,000	11,000,000
Residential Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	1,539,000,000	1,714,000,000
Other Mortgage-Backed Securities [Member] | Commercial Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	6,869,000,000	6,997,000,000
Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	789,000,000	995,000,000
Commercial loans	6,000,000	45,000,000
Total trading account assets	795,000,000	1,040,000,000
Securities available for sale	20,807,000,000	21,843,000,000
Total other investments	84,000,000	90,000,000
Loans, net of unearned income of $575 and $603	3,000,000	4,000,000
Loans held for sale (residential)	152,000,000	140,000,000
Derivative assets, gross	2,877,000,000	1,253,000,000
Derivative assets, netting adjustments	(809,000,000)	(473,000,000)
Total derivative assets	2,068,000,000	780,000,000
Accrued income and other assets	0	0
Total assets at fair value	23,909,000,000	23,897,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Total liabilities on a recurring basis at fair value	1,255,000,000	903,000,000
Recurring [Member] | US Treasury and Government [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	556,000,000	843,000,000
Securities available for sale	341,000,000	334,000,000
Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	19,000,000	30,000,000
Securities available for sale	4,000,000	4,000,000
Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	38,000,000	44,000,000
Securities available for sale	9,000,000	11,000,000
Recurring [Member] | Commercial Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	6,869,000,000	6,997,000,000
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	65,000,000	69,000,000
Recurring [Member] | Equity Investments Direct [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	10,000,000	12,000,000
Recurring [Member] | Equity Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	19,000,000	21,000,000
Recurring [Member] | Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	176,000,000	78,000,000
Recurring [Member] | Other Mortgage-Backed Securities [Member] | Residential Mortgage Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	1,539,000,000	1,714,000,000
Recurring [Member] | Short [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Short positions	606,000,000	705,000,000
Recurring [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	1,244,000,000	533,000,000
Derivative liabilities, netting adjustments	(595,000,000)	(335,000,000)
Total derivative liabilities	649,000,000	198,000,000
Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	1,941,000,000	963,000,000
Recurring [Member] | Interest Rate [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	329,000,000	253,000,000
Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	164,000,000	67,000,000
Recurring [Member] | Foreign Exchange [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	157,000,000	60,000,000
Recurring [Member] | Commodity [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	704,000,000	208,000,000
Recurring [Member] | Commodity [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	690,000,000	200,000,000
Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	11,000,000	1,000,000
Recurring [Member] | Credit [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	28,000,000	10,000,000
Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	57,000,000	14,000,000
Recurring [Member] | Other [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	40,000,000	10,000,000
Level 1 [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	0	0
Total other investments	0	0
Loans, net of unearned income of $575 and $603	0	0
Loans held for sale (residential)	0	0
Derivative assets, gross	124,000,000	49,000,000
Derivative assets, netting adjustments	0	0
Total derivative assets	124,000,000	49,000,000
Accrued income and other assets	0	0
Total assets at fair value	124,000,000	49,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Total liabilities on a recurring basis at fair value	241,000,000	62,000,000
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	0	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	124,000,000	19,000,000
Level 1 [Member] | Recurring [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	117,000,000	43,000,000
Derivative liabilities, netting adjustments	0	0
Total derivative liabilities	117,000,000	43,000,000
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	124,000,000	49,000,000
Level 1 [Member] | Recurring [Member] | Foreign Exchange [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	117,000,000	43,000,000
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	789,000,000	995,000,000
Commercial loans	6,000,000	45,000,000
Total trading account assets	795,000,000	1,040,000,000
Securities available for sale	20,798,000,000	21,832,000,000
Total other investments	0	0
Loans, net of unearned income of $575 and $603	0	0
Loans held for sale (residential)	142,000,000	140,000,000
Derivative assets, gross	2,629,000,000	1,176,000,000
Derivative assets, netting adjustments	0	0
Total derivative assets	2,629,000,000	1,176,000,000
Accrued income and other assets	0	0
Total assets at fair value	24,364,000,000	24,188,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Total liabilities on a recurring basis at fair value	1,581,000,000	1,167,000,000
Level 2 [Member] | Recurring [Member] | US Treasury and Government [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	556,000,000	843,000,000
Securities available for sale	341,000,000	334,000,000
Level 2 [Member] | Recurring [Member] | US States and Political Subdivisions Debt Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	19,000,000	30,000,000
Securities available for sale	4,000,000	4,000,000
Level 2 [Member] | Recurring [Member] | Other Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	38,000,000	44,000,000
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	6,869,000,000	6,997,000,000
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	0	0
Level 2 [Member] | Recurring [Member] | Equity Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	0	0
Level 2 [Member] | Recurring [Member] | Other Mortgage-Backed Securities [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total trading account securities	176,000,000	78,000,000
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	1,539,000,000	1,714,000,000
Level 2 [Member] | Recurring [Member] | Short [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Short positions	482,000,000	686,000,000
Level 2 [Member] | Recurring [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	1,099,000,000	481,000,000
Derivative liabilities, netting adjustments	0	0
Total derivative liabilities	1,099,000,000	481,000,000
Level 2 [Member] | Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	1,845,000,000	941,000,000
Level 2 [Member] | Recurring [Member] | Interest Rate [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	329,000,000	253,000,000
Level 2 [Member] | Recurring [Member] | Foreign Exchange [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	40,000,000	18,000,000
Level 2 [Member] | Recurring [Member] | Foreign Exchange [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	40,000,000	17,000,000
Level 2 [Member] | Recurring [Member] | Commodity [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	704,000,000	208,000,000
Level 2 [Member] | Recurring [Member] | Commodity [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	690,000,000	200,000,000
Level 2 [Member] | Recurring [Member] | Credit [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	6,000,000	0
Level 2 [Member] | Recurring [Member] | Credit [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	0	1,000,000
Level 2 [Member] | Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross	34,000,000	9,000,000
Level 2 [Member] | Recurring [Member] | Other [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	40,000,000	10,000,000
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	9,000,000	11,000,000
Total other investments	11,000,000	13,000,000
Loans, net of unearned income of $575 and $603	3,000,000	4,000,000
Loans held for sale (residential)	10,000,000	0
Derivative assets, gross	124,000,000	28,000,000
Derivative assets, netting adjustments	0	0
Total derivative assets	124,000,000	28,000,000
Accrued income and other assets	0	0
Total assets at fair value	157,000,000	56,000,000
LIABILITIES MEASURED ON A RECURRING BASIS
Total liabilities on a recurring basis at fair value	28,000,000	9,000,000
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	9,000,000	11,000,000
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
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		12,000,000
Level 3 [Member] | Recurring [Member] | Equity Investments [Member]
ASSETS MEASURED ON A RECURRING BASIS
Total other investments	10,000,000	12,000,000
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	28,000,000	9,000,000
Derivative liabilities, netting adjustments	0	0
Total derivative liabilities	28,000,000	9,000,000
Level 3 [Member] | Recurring [Member] | Interest Rate [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross		22,000,000
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	5,000,000	1,000,000
Level 3 [Member] | Recurring [Member] | Credit [Member] | Long [Member]
LIABILITIES MEASURED ON A RECURRING BASIS
Derivative liabilities, gross	28,000,000	9,000,000
Level 3 [Member] | Recurring [Member] | Other [Member]
ASSETS MEASURED ON A RECURRING BASIS
Derivative assets, gross		5,000,000
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	64,000,000	68,000,000
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	8,000,000	8,000,000
Collateralized Mortgage Obligations [Member] | Recurring [Member]
ASSETS MEASURED ON A RECURRING BASIS
Securities available for sale	12,045,000,000	12,783,000,000
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	12,045,000,000	12,783,000,000
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, 2020	Dec. 31, 2019	Mar. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other equity investments	$ 145,000,000		$ 134,000,000
Impairment loss (less than)	1,000,000
Discontinued Operations [Member] | Education Lending [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
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	679,000,000		605,000,000
Loans at fair value	3,000,000		4,000,000
Fair Value [Member] | Discontinued Operations [Member] | Education Lending [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	649,000,000		729,000,000
Carrying Amount [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	679,000,000		605,000,000
Loans at fair value	3,000,000		4,000,000
Carrying Amount [Member] | Discontinued Operations [Member] | Education Lending [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net of allowance	778,000,000		855,000,000
Level 3 [Member] | Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	606,000,000		528,000,000
Loans at fair value	3,000,000		$ 4,000,000
Recurring [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	84,000,000	$ 90,000,000
Liabilities measured at fair value on non recurring basis	1,255,000,000	903,000,000
Recurring [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments	11,000,000	13,000,000
Liabilities measured at fair value on non recurring basis	28,000,000	9,000,000
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

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, 2020	Mar. 31, 2019
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	$ 65
Unfunded Commitments	20
Funded Commitments	0	$ 1
Funded Other	0	1
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	0	1
Indirect Investments [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value	64
Unfunded Commitments	20
Funded Commitments	0	1
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, 2020	Mar. 31, 2019
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	$ 11	$ 20
Gains (Losses) Included in Other Comprehensive Income	(2)	5
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	9	25
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	12	7
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	(2)	0
Purchases	0	0
Sales	0	0
Settlements	0	0
Transfers Other	0	0
Transfers into Level 3	0	1
Transfers out of Level 3	0	0
End of Period Balance	10	8
Unrealized Gains (Losses) Included in Earnings	(2)	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	1
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	0	0
Purchases	0	1
Sales	0	(1)
Settlements	0	0
Transfers Other	0	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
Interest Rate [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	22	5
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	19	1
Purchases	11	0
Sales	(1)	0
Settlements	0	0
Transfers Other	0	0
Transfers into Level 3	55	1
Transfers out of Level 3	(10)	(4)
End of Period Balance	96	3
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	1	0
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	(16)	0
Purchases	1	(1)
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	(23)	(1)
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	5	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	18	1
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
End of Period Balance	23	4
Unrealized Gains (Losses) Included in Earnings	0	0
Loans Held For Sale (Residential) [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	0	0
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	10	1
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
End of Period Balance	10	1
Unrealized Gains (Losses) Included in Earnings	0	0
Loans, Net of Unearned Income (Residential) [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning of Period Balance	4	3
Gains (Losses) Included in Other Comprehensive Income	0	0
Gains (Losses) Included in Earnings	0	0
Purchases	0	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	3	3
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, 2020	Dec. 31, 2019	Mar. 31, 2019
ASSETS MEASURED ON A NONRECURRING BASIS
Impaired loans and leases	$ 33		$ 76
Accrued income and other assets	64		169
Total assets at fair value	97		$ 245
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	118
Total assets at fair value	0	118
Level 3 [Member]
ASSETS MEASURED ON A NONRECURRING BASIS
Impaired loans and leases	33	76
Accrued income and other assets	64	51
Total assets at fair value	$ 97	$ 127

Fair Value Measurements - Quant

Fair Value Measurements - Quantitative Information about Level 3 Fair Value Measurements (Details)	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Mar. 31, 2019USD ($)
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	$ 20,807,000,000	$ 21,843,000,000
Loans held for sale (residential)		0
Derivative assets	2,068,000,000	780,000,000
Mortgage servicing assets excluded from OREO	62,000,000	46,000,000
Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	20,807,000,000	21,843,000,000
Other investments	84,000,000	90,000,000
Loans held for sale (residential)	152,000,000	140,000,000
Derivative assets	2,068,000,000	780,000,000
Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	33,000,000		$ 76,000,000
Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	9,000,000	11,000,000
Other investments	11,000,000	13,000,000
Loans held for sale (residential)	10,000,000	0
Derivative assets	124,000,000	28,000,000
Level 3 [Member] | Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	33,000,000	$ 76,000,000
Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Other investments	$ 10,000,000
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	0.1240	0.1391
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	0.1703	0.1724
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	0.1475	0.1561
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	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	0.5100	0.4700
Valuation, Market Comparable Pricing [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Loans held for sale (residential)	$ 10,000,000
Loans, net of unearned income (residential)	$ 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 (residential), measurement input	1.0415
Loans, net of unearned income (residential), measurement input	0.7900	0.7900
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 (residential), measurement input	1.0701
Loans, net of unearned income (residential), measurement input	0.9800	0.9800
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 (residential), measurement input	1.0525
Loans, net of unearned income (residential), measurement input	0.9107	0.9105
Valuation, Fair Value Of Underlying Collateral [Member] | Level 3 [Member] | Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Impaired loans	$ 33,000,000
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	0
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	0.9000	0.6000
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	0.1000
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	$ 96,000,000
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	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	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	0.1390	0.0540
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	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	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	9.178	9.168
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	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	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	0.476	0.492
Credit [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets	$ 5,000,000
Derivative liabilities	$ (28,000,000)
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 assets, measurement input	0.0002	0.0002
Derivative liabilities, measurement input	0.0002	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 assets, measurement input	1	1
Derivative liabilities, measurement input	1	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 assets, measurement input	0.1330	0.042
Derivative liabilities, measurement input	0.2519	0.1224
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 assets, measurement input	1	1
Derivative liabilities, measurement input	1	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 assets, measurement input	19	19
Derivative liabilities, measurement input	19	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 assets, measurement input	10.14	10.13
Derivative liabilities, measurement input	7.76	8.06
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 assets, measurement input	0	0
Derivative liabilities, measurement input	0	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 assets, measurement input	1	1
Derivative liabilities, measurement input	1	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 assets, measurement input	0.493	0.498
Derivative liabilities, measurement input	0.394	0.411
Other [Member] | Valuation Technique, Discounted Cash Flow [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Derivative assets	$ 23,000,000
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	0.2734	0.3771
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	0.9931	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	0.7408	0.7933
Other Securities [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	$ 9,000,000	$ 11,000,000
Other Securities [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	9,000,000	11,000,000
Other Securities [Member] | Level 3 [Member] | Recurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Securities available for sale	9,000,000	$ 11,000,000
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	$ 9,000,000
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	0.1482	0.1610
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	0.3000
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	0.4300	0.4300
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

Fair Value Measurements - Fai_3

Fair Value Measurements - Fair Value Disclosures of Financial Instruments (Details) - USD ($)		Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
ASSETS
Trading account assets		$ 795,000,000	$ 1,040,000,000
Loans held for sale			0
Derivative assets		2,068,000,000	780,000,000
Securities available for sale		20,807,000,000	21,843,000,000
Amortized Cost		9,638,000,000	10,067,000,000
Held-to-maturity securities		10,012,000,000	10,116,000,000
Loans, net of allowance		103,198,000,000	94,646,000,000
Loans held for sale	[1]	2,143,000,000	1,334,000,000
LIABILITIES
Long-term debt		13,732,000,000	$ 12,448,000,000
Carrying Amount [Member]
ASSETS
Trading account assets		795,000,000		$ 1,040,000,000
Other investments		679,000,000		605,000,000
Loans, net of allowance		3,000,000		4,000,000
Loans held for sale		152,000,000		140,000,000
Securities available for sale		20,807,000,000		21,843,000,000
Amortized Cost		9,638,000,000		10,067,000,000
Loans, net of allowance		101,836,000,000		93,742,000,000
Loans held for sale		1,991,000,000		1,194,000,000
Cash and short-term investments		4,938,000,000		2,004,000,000
LIABILITIES
Time deposits		10,253,000,000		11,652,000,000
Short-term borrowings		7,050,000,000		1,092,000,000
Long-term debt		13,732,000,000		12,448,000,000
Deposits with no stated maturity		105,051,000,000		100,218,000,000
Fair Value [Member]
ASSETS
Trading account assets		795,000,000		1,040,000,000
Other investments		679,000,000		605,000,000
Loans, net of allowance		3,000,000		4,000,000
Loans held for sale		152,000,000		140,000,000
Securities available for sale		20,807,000,000		21,843,000,000
Held-to-maturity securities		10,012,000,000		10,116,000,000
Loans, net of allowance		99,535,000,000		92,641,000,000
Loans held for sale		1,991,000,000		1,194,000,000
Cash and short-term investments		4,938,000,000		2,004,000,000
LIABILITIES
Time deposits		10,336,000,000		11,752,000,000
Short-term borrowings		7,050,000,000		1,092,000,000
Long-term debt		13,859,000,000		12,943,000,000
Deposits with no stated maturity		105,051,000,000		100,218,000,000
Fair Value [Member] | Level 1 [Member]
ASSETS
Trading account assets		0		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		4,938,000,000		2,004,000,000
LIABILITIES
Time deposits		0		0
Short-term borrowings		124,000,000		19,000,000
Long-term debt		13,144,000,000		12,694,000,000
Deposits with no stated maturity		0		0
Fair Value [Member] | Level 2 [Member]
ASSETS
Trading account assets		795,000,000		1,040,000,000
Other investments		0		0
Loans, net of allowance		0		0
Loans held for sale		142,000,000		140,000,000
Securities available for sale		20,798,000,000		21,832,000,000
Held-to-maturity securities		10,012,000,000		10,116,000,000
Loans, net of allowance		0		0
Loans held for sale		0		0
Cash and short-term investments		0		0
LIABILITIES
Time deposits		10,336,000,000		11,752,000,000
Short-term borrowings		6,926,000,000		1,073,000,000
Long-term debt		715,000,000		249,000,000
Deposits with no stated maturity		105,051,000,000		100,218,000,000
Fair Value [Member] | Level 3 [Member]
ASSETS
Trading account assets		0		0
Other investments		606,000,000		528,000,000
Loans, net of allowance		3,000,000		4,000,000
Loans held for sale		10,000,000		0
Securities available for sale		9,000,000		11,000,000
Held-to-maturity securities		0		0
Loans, net of allowance		99,535,000,000		92,641,000,000
Loans held for sale		1,991,000,000		1,194,000,000
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		73,000,000		77,000,000
Derivatives Designated as Hedging Instruments [Member] | Carrying Amount [Member]
ASSETS
Derivative assets		60,000,000		65,000,000
LIABILITIES
Derivative liabilities		0		4,000,000
Derivatives Designated as Hedging Instruments [Member] | Fair Value [Member]
ASSETS
Derivative assets		60,000,000		65,000,000
Derivative assets, Netting Adjustment		(6,000,000)		(126,000,000)
LIABILITIES
Derivative liabilities		0		4,000,000
Derivative liabilities, Netting Adjustment		(3,000,000)		(16,000,000)
Derivatives Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 1 [Member]
ASSETS
Derivative assets		0		0
LIABILITIES
Derivative liabilities		0		0
Derivatives Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 2 [Member]
ASSETS
Derivative assets		66,000,000		191,000,000
LIABILITIES
Derivative liabilities		3,000,000		20,000,000
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		2,008,000,000		715,000,000
LIABILITIES
Derivative liabilities		649,000,000		194,000,000
Derivatives Not Designated as Hedging Instruments [Member] | Fair Value [Member]
ASSETS
Derivative assets		2,008,000,000		715,000,000
Derivative assets, Netting Adjustment		(803,000,000)		(347,000,000)
LIABILITIES
Derivative liabilities		649,000,000		194,000,000
Derivative liabilities, Netting Adjustment		(592,000,000)		(319,000,000)
Derivatives Not Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 1 [Member]
ASSETS
Derivative assets		124,000,000		49,000,000
LIABILITIES
Derivative liabilities		117,000,000		43,000,000
Derivatives Not Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 2 [Member]
ASSETS
Derivative assets		2,563,000,000		985,000,000
LIABILITIES
Derivative liabilities		1,096,000,000		461,000,000
Derivatives Not Designated as Hedging Instruments [Member] | Fair Value [Member] | Level 3 [Member]
ASSETS
Derivative assets		124,000,000		28,000,000
LIABILITIES
Derivative liabilities		$ 28,000,000		$ 9,000,000
[1]	Total loans held for sale include real estate — residential mortgage loans held for sale at fair value of $152 million at March 31, 2020 , and $140 million at December 31, 2019 .

Securities - Details of Securit

Securities - Details of Securities (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
SECURITIES AVAILABLE FOR SALE
Amortized Cost (a)	$ 20,126	$ 21,692
Gross Unrealized Gains	688	266
Gross Unrealized Losses	7	115
Fair Value	20,807	21,843
HELD-TO-MATURITY SECURITIES
Amortized Cost (a)	9,638	10,067
Gross Unrealized Gains	374	107
Gross Unrealized Losses	0	58
Fair Value	10,012	10,116
Accrued interest	241	244
US Treasury and Government [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost (a)	340	334
Gross Unrealized Gains	1	0
Gross Unrealized Losses	0	0
Fair Value	341	334
US States and Political Subdivisions Debt Securities [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost (a)	4	4
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	4	4
Collateralized Mortgage Obligations [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost (a)	11,705	12,772
Gross Unrealized Gains	342	82
Gross Unrealized Losses	2	71
Fair Value	12,045	12,783
HELD-TO-MATURITY SECURITIES
Amortized Cost (a)	5,354	5,692
Gross Unrealized Gains	157	23
Gross Unrealized Losses	0	49
Fair Value	5,511	5,666
Residential Mortgage Backed Securities [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost (a)	1,472	1,677
Gross Unrealized Gains	67	41
Gross Unrealized Losses	0	4
Fair Value	1,539	1,714
HELD-TO-MATURITY SECURITIES
Amortized Cost (a)	390	409
Gross Unrealized Gains	19	6
Gross Unrealized Losses	0	0
Fair Value	409	415
Asset-backed Securities [Member]
HELD-TO-MATURITY SECURITIES
Amortized Cost (a)	11	11
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	11	11
Other Securities [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost (a)	8	7
Gross Unrealized Gains	1	4
Gross Unrealized Losses	0	0
Fair Value	9	11
HELD-TO-MATURITY SECURITIES
Amortized Cost (a)	15	15
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	15	15
Other Mortgage-Backed Securities [Member] | Commercial Mortgage Backed Securities [Member]
SECURITIES AVAILABLE FOR SALE
Amortized Cost (a)	6,597	6,898
Gross Unrealized Gains	277	139
Gross Unrealized Losses	5	40
Fair Value	6,869	6,997
HELD-TO-MATURITY SECURITIES
Amortized Cost (a)	3,868	3,940
Gross Unrealized Gains	198	78
Gross Unrealized Losses	0	9
Fair Value	4,066	$ 4,009
Securities Available for Sale [Member]
HELD-TO-MATURITY SECURITIES
Accrued interest	42
Securities Held-to-maturity [Member]
HELD-TO-MATURITY SECURITIES
Accrued interest	$ 19

Securities - Available for Sale

Securities - Available for Sale Securities (Unrealized Loss Position) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Held-to-maturity securities:
Temporarily impaired securities, fair value, less than 12 months	$ 1,247	$ 7,250
Temporarily impaired securities, gross unrealized losses, less than 12 months	5	60
Temporarily impaired securities, fair value, 12 months or longer	483	7,382
Temporarily impaired securities, gross unrealized losses, 12 months or longer	2	113
Temporarily impaired securities, fair value	1,730	14,632
Temporarily impaired securities, gross unrealized losses	7	173
Collateralized Mortgage Obligations [Member]
Securities available for sale:
Fair value, less than 12 months	135	3,432
Gross unrealized losses, less than 12 months	1,000,000	20
Fair value, 12 months or longer	416	3,221
Gross unrealized losses, 12 months or longer	2	51
Fair value	551	6,653
Gross unrealized losses	2	71
Held-to-maturity securities:
Fair value, less than 12 months	8	1,626
Gross unrealized losses, less than 12 months	1,000,000	14
Fair value, 12 months or longer	60	2,289
Gross unrealized losses, 12 months or longer	1,000,000	35
Fair value	68	3,915
Gross unrealized losses	0	49
Commercial Mortgage Backed Securities [Member]
Securities available for sale:
Fair value, less than 12 months	1,083	1,541
Gross unrealized losses, less than 12 months	5	17
Fair value, 12 months or longer	0	1,213
Gross unrealized losses, 12 months or longer	0	23
Fair value	1,083	2,754
Gross unrealized losses		40
Held-to-maturity securities:
Fair value, less than 12 months		518
Gross unrealized losses, less than 12 months		9
Fair value, 12 months or longer		0
Gross unrealized losses, 12 months or longer		0
Fair value		518
Gross unrealized losses		9
Asset-backed Securities [Member]
Held-to-maturity securities:
Fair value, less than 12 months	2	11
Gross unrealized losses, less than 12 months	1,000,000	1,000,000
Fair value, 12 months or longer	0	0
Gross unrealized losses, 12 months or longer	0	0
Fair value	2	11
Gross unrealized losses	0	0
Other Securities [Member]
Securities available for sale:
Fair value, less than 12 months	1
Gross unrealized losses, less than 12 months	1,000,000
Fair value, 12 months or longer	0
Gross unrealized losses, 12 months or longer	0
Fair value	1
Gross unrealized losses	0
Held-to-maturity securities:
Fair value, less than 12 months	8	3
Gross unrealized losses, less than 12 months	1,000,000	1,000,000
Fair value, 12 months or longer	0	0
Gross unrealized losses, 12 months or longer	0	0
Fair value	8	3
Gross unrealized losses	0	0
US Treasury and Government [Member]
Securities available for sale:
Fair value, less than 12 months		30
Gross unrealized losses, less than 12 months		1,000,000
Fair value, 12 months or longer		30
Gross unrealized losses, 12 months or longer		1,000,000
Fair value		60
Gross unrealized losses		0
Other Mortgage-Backed Securities [Member] | Residential Mortgage Backed Securities [Member]
Securities available for sale:
Fair value, less than 12 months	10	33
Gross unrealized losses, less than 12 months	1,000,000	1,000,000
Fair value, 12 months or longer	7	629
Gross unrealized losses, 12 months or longer	1,000,000	4
Fair value	17	662
Gross unrealized losses	0	4
Held-to-maturity securities:
Fair value, less than 12 months		56
Gross unrealized losses, less than 12 months		1,000,000
Fair value, 12 months or longer		0
Gross unrealized losses, 12 months or longer		0
Fair value		56
Gross unrealized losses		$ 0
Other Mortgage-Backed Securities [Member] | Commercial Mortgage Backed Securities [Member]
Securities available for sale:
Gross unrealized losses	$ 5

Securities - Additional Informa

Securities - Additional Information (Details) $ in Billions	Mar. 31, 2020USD ($)
Investments, Debt and Equity Securities [Abstract]
Loans pledged as collateral	$ 8.4

Securities - Securities by Matu

Securities - Securities by Maturity (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Investments, Debt and Equity Securities [Abstract]
Amortized Cost of Securities Available for sale, Due in one year or less	$ 571
Amortized Cost of Securities Available for sale, Due after one through five years	14,660
Amortized Cost of Securities Available for sale, Due after five through ten years	4,893
Amortized Cost of Securities Available for sale, Due after ten years	2
Amortized Cost (a)	20,126	$ 21,692
Fair Value of Securities Available for sale, Due in one year or less	577
Fair Value of Securities Available for sale, Due after one through five years	15,101
Fair Value of Securities Available for sale, Due after five through ten years	5,127
Fair Value of Securities Available for sale, Due after ten years	2
Total Fair Value of Securities Available For Sale	20,807	21,843
Amortized Cost of Held-to-Maturity Securities, Due in one year or less	60
Amortized Cost of Held-to-Maturity Securities, Due after one through five years	6,690
Amortized Cost of Held-to-Maturity Securities, Due after five through ten years	2,888
Amortized Cost of Held-to-Maturity Securities, Due after ten years	0
Amortized Cost (a)	9,638	10,067
Fair Value of Held-to-Maturity Securities, Due in one year or less	61
Fair Value of Held-to-Maturity Securities, Due after one through five years	6,881
Fair Value of Held-to-Maturity Securities, Due after five through ten years	3,070
Fair Value of Held-to-Maturity Securities, Due after ten years	0
Total Fair Value of Held-to-Maturity Securities	$ 10,012	$ 10,116

Derivatives and Hedging Activ_3

Derivatives and Hedging Activities - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)derivativerating	Dec. 31, 2019USD ($)rating
Credit Derivatives [Line Items]
Derivative assets after effects of bilateral collateral and master netting agreements	$ 60
Derivative liabilities after effects of bilateral collateral and master netting agreements	1
Derivative assets not designated as hedging instruments after effects of bilateral collateral and master netting agreements, and a reserve for potential future losses	2,100
Derivative liabilities not designated as hedging instruments after effects of bilateral collateral and master netting agreements, and a reserve for potential future losses	649
Reclassify of after-tax net losses on derivative instruments from AOCI	$ 242
Length of time hedge in cash flow hedge	12 months
Reclassification of net losses related to terminated cash flow hedges from AOCI to income	$ (86)
Maximum length of time over which forecasted transactions are hedged, years	9 years
Cash collateral netted against derivative assets	$ 370	$ 207
Collateral netted against derivative liabilities	156	69
Gross exposure on derivatives, after taking into account the effects of bilateral collateral and master netting agreements	966
Net exposure on derivatives, after taking into account, the effects of bilateral collateral and master netting agreements	327
Over-collateralization on derivatives to broker-dealers and banks, after the application of master netting agreements and collateral	323
Additional collateral held in the form of securities	4
Default reserve associated with uncollateralized contracts	86
Gross exposure on derivatives after taking into account effects of master netting agreements	1,900
Net exposure on derivatives with clients after application of master netting agreements collateral and related reserve	1,700
Net liability position totaled	17	$ 9
Banking Subsidiary [Member]
Credit Derivatives [Line Items]
Net liability position totaled	106
Derivative assets included in net liability position	61
Derivative liabilities included in net liability position	(167)
Cash and securities collateral posted	$ 101
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	4
Banking Subsidiary [Member] | Maximum [Member] | Unsecured Debt [Member]
Credit Derivatives [Line Items]
Payments to terminate contracts (less than for the $1 million)	$ 3	$ 3

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, 2020	Mar. 31, 2019
Derivatives, Fair Value [Line Items]
Notional Amount	$ 120,402	$ 126,077
Derivative assets, netting adjustments	(809)	(473)
Derivative Assets, net	2,065	778
Derivative liabilities, netting adjustments	(595)	(335)
Derivative Liabilities, net	649	156
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	94,598	86,869
Derivative Assets	2,811	1,062
Derivative Liabilities	1,241	513
Interest Rate [Member] | Derivatives Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	25,804	39,208
Derivative Assets	66	191
Derivative Liabilities	3	20
Interest Rate [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	77,335	71,209
Derivative Assets	1,875	772
Derivative Liabilities	326	233
Foreign Exchange [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	6,340	6,572
Derivative Assets	164	67
Derivative Liabilities	157	60
Commodity [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	4,556	5,324
Derivative Assets	704	208
Derivative Liabilities	690	200
Credit [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	959	427
Derivative Assets	11	1
Derivative Liabilities	28	10
Other [Member] | Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	5,408	3,337
Derivative Assets	57	14
Derivative Liabilities	40	10
Net Derivatives [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	120,402	126,077
Derivative Assets, net	2,068	780
Derivative Liabilities, net	649	198
Counterparty And Cash Collateral Netting [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	0	0
Derivative Assets, net	(3)	(2)
Derivative Liabilities, net	$ 0	$ (42)

Derivatives and Hedging Activ_5

Derivatives and Hedging Activities - Cumulative Basis Adjustments on Fair Value Hedges (Details) - Long-term Debt [Member] - Interest Rate [Member] - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Carrying amount of hedged item	$ 7,774	$ 8,408
Hedge accounting basis adjustment	533	240
Derivatives Not Designated as Hedging Instruments [Member]
Derivatives, Fair Value [Line Items]
Hedge accounting basis adjustment	$ (9)	$ (9)

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, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Interest expense — Long-term debt		$ (90)	$ (120)
Interest income — Loans		1,026	1,066
Deposits		(169)	(202)
Other income	[1]	(88)	10
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		(294)	(93)
Recognized on derivatives designated as hedging instruments		311	82
Net income (expense) recognized on fair value hedges		17	(11)
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		34	(24)
Net income (expense) recognized on cash flow hedges		34	(24)
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, 2020 , net securities gains (losses) totaled $4 million . For the three months ended March 31, 2019 , net securities gains (losses) totaled less than $1 million . For the three months ended March 31, 2020 , and March 31, 2019 , Key did no t have any impairment losses related to securities.

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, 2020	Mar. 31, 2019
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	$ 527	$ 106
Net Gains (Losses) Reclassified From OCI Into Income	33	(25)
Interest Income [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	562	115
Net Gains (Losses) Reclassified From OCI Into Income	34	(24)
Interest Expense [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	(5)	(1)
Net Gains (Losses) Reclassified From OCI Into Income	(1)	(1)
Underwriting Discounts Fees And Commissions [Member] | Interest Rate [Member] | Cash Flow Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI	(30)	(5)
Net Gains (Losses) Reclassified From OCI Into Income	$ 0	0
Other Income [Member] | Foreign Exchange [Member] | Net Investment Hedges [Member]
Derivatives, Fair Value [Line Items]
Net Gains (Losses) Recognized in OCI		(3)
Net Gains (Losses) Reclassified From OCI Into Income		$ 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, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	$ 14	$ 12
Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	2	6
Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	12	10
Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	2	1
Credit [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(15)	(6)
Other Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	13	1
Corporate Services Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	9	20
Corporate Services Income [Member] | Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	11	8
Corporate Services Income [Member] | Foreign Exchange [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	12	10
Corporate Services Income [Member] | Commodity [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	2	1
Corporate Services Income [Member] | Credit [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(16)	1
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)	4	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)	4	0
Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	1	(8)
Other Income [Member] | Interest Rate [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	(9)	(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)	1	(7)
Other Income [Member] | Other Credit Derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total net gains (losses)	$ 9	$ 1

Derivatives and Hedging Activ_9

Derivatives and Hedging Activities - Fair Value of Derivative Assets by Type (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Credit Derivatives [Line Items]
Derivative assets before collateral	$ 2,438	$ 987
Less: Related collateral	370	207
Total derivative assets	2,068	780
Interest Rate [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	1,744	848
Foreign Exchange [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	70	30
Commodity [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	559	95
Credit [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	8	0
Other [Member]
Credit Derivatives [Line Items]
Derivative assets before collateral	$ 57	$ 14

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, 2020	Dec. 31, 2019
Credit Derivatives [Line Items]
Notional Amount	$ 358	$ 134
Average Term (Years)	0 years	0 years
Payment / Performance Risk	0.00%	0.00%
Other [Member]
Credit Derivatives [Line Items]
Notional Amount	$ 358	$ 134
Average Term (Years)	14 years 7 months 13 days	14 years 3 months 18 days
Payment / Performance Risk	27.09%	14.56%

Derivatives and Hedging Acti_11

Derivatives and Hedging Activities - Credit Risk Contingent Feature (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
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	1	$ 1
Standard & Poor's, A- Rating [Member] | Two Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	1	1
Standard & Poor's, A- Rating [Member] | Three Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	1	1
Moody's, A3 Rating [Member] | One Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	1	1
Moody's, A3 Rating [Member] | Two Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	1	1
Moody's, A3 Rating [Member] | Three Rating Downgrade [Member]
Credit Derivatives [Line Items]
Additional collateral aggregate fair value	$ 1	$ 1

Mortgage Servicing Assets - Cha

Mortgage Servicing Assets - Changes in Carrying Amount of Mortgage Servicing Assets (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Commercial Mortgage Backed Securities [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	$ 539	$ 502
Servicing retained from loan sales	24	18
Purchases	11	6
Amortization	(29)	(29)
Temporary impairments	(2)	0
Balance at end of period	543	497
Fair value at end of period	655	727
Residential Mortgage Backed Securities [Member]
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Balance at beginning of period	46	37
Servicing retained from loan sales	5	2
Purchases	0	0
Amortization	(2)	(1)
Temporary impairments	(9)	0
Balance at end of period	40	38
Fair value at end of period	$ 41	$ 50

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, 2020	Mar. 31, 2019
Commercial Mortgage Backed Securities [Member] | Minimum [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	0.97%	1.00%
Residual cash flows discount rate	7.00%	7.00%
Escrow earn rate	1.20%	2.22%
Loan assumption rate	0.01%	0.00%
Commercial Mortgage Backed Securities [Member] | Maximum [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	2.00%	2.00%
Residual cash flows discount rate	11.42%	15.00%
Escrow earn rate	1.92%	3.70%
Loan assumption rate	3.37%	3.18%
Commercial Mortgage Backed Securities [Member] | Weighted Average [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	1.14%	1.14%
Residual cash flows discount rate	9.24%	9.19%
Escrow earn rate	1.67%	2.98%
Loan assumption rate	1.32%	1.39%
Residential Mortgage Backed Securities [Member] | Minimum [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	7.50%	7.50%
Prepayment speed	10.50%	9.32%
Servicing cost	$ 62,000,000	$ 62,000,000
Residential Mortgage Backed Securities [Member] | Maximum [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	8.50%	10.00%
Prepayment speed	55.60%	58.76%
Servicing cost	$ 8,375,000,000	$ 4,375,000,000
Residential Mortgage Backed Securities [Member] | Weighted Average [Member]
Servicing Assets at Fair Value [Line Items]
Expected defaults	7.52%	7.54%
Prepayment speed	17.16%	9.93%
Servicing cost	$ 68,140,000	$ 68,230,000

Mortgage Servicing Assets - Add

Mortgage Servicing Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Commercial Mortgage Backed Securities [Member]
Servicing Assets at Fair Value [Line Items]
Contractual fee income from servicing commercial mortgage loans	$ 50	$ 46
Amortization of servicing commercial mortgage loans	32	29
Residential Mortgage Backed Securities [Member]
Servicing Assets at Fair Value [Line Items]
Contractual fee income from servicing commercial mortgage loans	6	4
Amortization of servicing commercial mortgage loans	$ 2	$ 1

Leases - Components of Equipmen

Leases - Components of Equipment Leasing Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Sales-type and direct financing leases
Interest income on lease receivable	$ 28	$ 30
Interest income related to accretion of unguaranteed residual asset	3	3
Interest income on deferred fees and costs	0	0
Total sales-type and direct financing lease income	31	33
Operating leases
Operating lease income related to lease payments	34	33
Other operating leasing gains	(4)	4
Total operating lease income and other leasing gains	30	37
Total lease income	$ 61	$ 70

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Variable Interest Entity [Line Items]
Investments in operating partnerships	$ 280,000,000	$ 282,000,000
Liabilities related to investments in qualified affordable housing projects	1,000,000	1,000,000
VIE, assets that can only be used to settle obligations	156,197,000,000		$ 144,988,000,000
VIE, liabilities	138,786,000,000		127,950,000,000
Recurring [Member]
Variable Interest Entity [Line Items]
Other investments	84,000,000		90,000,000
LIHTC Investments [Member]
Variable Interest Entity [Line Items]
Investments in operating partnerships	6,401,000,000		6,405,000,000
Liabilities related to investments in qualified affordable housing projects	2,534,000,000		2,526,000,000
Tax credit of investment	45,000,000
LIHTC Investments [Member] | Qualified affordable housing projects investment [Member]
Variable Interest Entity [Line Items]
Liabilities related to investments in qualified affordable housing projects	504,000,000		546,000,000
LIHTC Investments [Member] | Accrued Income And Other Assets [Member]
Variable Interest Entity [Line Items]
Investments in operating partnerships	1,400,000,000		1,500,000,000
LIHTC Investments [Member] | Investments [Member]
Variable Interest Entity [Line Items]
Amortization of investment	49,000,000	$ 46,000,000
Tax credit of investment	46,000,000
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	$ 64,000,000		$ 68,000,000

Variable Interest Entities - Su

Variable Interest Entities - Summary of Variable Interest Entities Information (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Variable Interest Entity [Line Items]
Total Assets	$ 280		$ 282
Total Liabilities	1		$ 1
LIHTC Investments [Member]
Variable Interest Entity [Line Items]
Total Assets	6,401	$ 6,405
Total Liabilities	2,534	2,526
Maximum Exposure to Loss	1,823	1,846
KCC Indirect Investments [Member]
Variable Interest Entity [Line Items]
Total Assets	12,221	12,954
Total Liabilities	182	205
Maximum Exposure to Loss	$ 84	$ 89

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Contingency [Line Items]
Total income tax expense (benefit), rate	13.40%	17.00%
Combined federal and state statutory tax rate	23.70%
Federal deferred tax asset	$ (273,000,000)	$ (89,000,000)
Valuation allowance	0
Key Corp [Member]
Income Tax Contingency [Line Items]
Unrecognized tax benefits	18,000,000
First Niagara Bank, N.A. [Member]
Income Tax Contingency [Line Items]
Allocated bad debt deductions	$ 92,000,000

Acquisitions and Discontinued_2

Acquisitions and Discontinued Operations - Additional Information (Details) $ in Millions	Mar. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Apr. 03, 2019Branch	Mar. 31, 2019USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Goodwill	$ 2,664	$ 2,664
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	821			$ 865
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
Intangible assets acquired	37
Goodwill	$ 148

Securities Financing Activiti_3

Securities Financing Activities - Summarized Securities Financing Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
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	0	0
Total	0	0
Repurchase agreements	(188)	(180)
Total	(188)	(180)
Federal Agency CMOs [Member]
Securities Financing Transaction [Line Items]
Assets pledged as collateral	396
Liabilities pledged as collateral	188
Gross Amounts Presented In Balance Sheets [Member]
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	4	5
Total	4	5
Repurchase agreements	194	187
Total	194	187
Netting Adjustments [Member]
Securities Financing Transaction [Line Items]
Reverse repurchase agreements	(4)	(5)
Total	(4)	(5)
Repurchase agreements	(6)	(7)
Total	$ (6)	$ (7)

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, 2020	Mar. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Interest cost on PBO	$ 9	$ 11
Expected return on plan assets	(10)	(12)
Amortization of losses	4	4
Settlement loss	4	0
Net pension/postretirement benefit cost	$ 7	$ 3

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, 2020	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Stock	$ 1,257	$ 1,257
Debentures adjustments related to financial instrument hedging	77	57
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	2.649%
KeyCorp Capital II [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 114
Common Stock	4
Principal Amount of of Debentures, Net of Discount	$ 118
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	$ 149
Common Stock	4
Principal Amount of of Debentures, Net of Discount	$ 153
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	3.083%
Willow Grove Statutory Trust I [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	2.051%
HNC Statutory Trust IV [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 17
Common Stock	1
Principal Amount of of Debentures, Net of Discount	$ 18
Interest Rate of Trust Preferred Securities and Debentures	3.05%
Westbank Capital Trust II [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 8
Common Stock	0
Principal Amount of of Debentures, Net of Discount	$ 8
Interest Rate of Trust Preferred Securities and Debentures	3.306%
Westbank Capital Trust III [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 8
Common Stock	0
Principal Amount of of Debentures, Net of Discount	$ 8
Interest Rate of Trust Preferred Securities and Debentures	3.306%
Business Trusts [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Trust Preferred Securities, Net of Discount	$ 490	466
Common Stock	17	17
Principal Amount of of Debentures, Net of Discount	$ 507	$ 483
Interest Rate of Trust Preferred Securities and Debentures	5.213%	5.214%
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, 2020USD ($)
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	$ 12,954
Liability Recorded	201
Written Put Options [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	2,598
Liability Recorded	102
Standby Letters of Credit [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	3,352
Liability Recorded	72
Recourse Agreement with FNMA [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	5,098
Liability Recorded	20
Residential Mortgage Reserve [Member]
Guarantor Obligations [Line Items]
Maximum Potential Undiscounted Future Payments	1,906
Liability Recorded	$ 7

Contingent Liabilities and Gu_4

Contingent Liabilities and Guarantees - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020USD ($)
Written Put Options [Member]
Commitments Contingencies And Guarantees [Line Items]
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
Recourse Agreement with FNMA [Member]
Commitments Contingencies And Guarantees [Line Items]
Weighted-average remaining term for outstanding commercial mortgage loans in years	7 years 8 months 12 days
Unpaid principal balance outstanding of loans sold	$ 17,100
Maximum potential amount of undiscounted future payments possibly required as percentage of principal balance of loans outstanding	30.00%
Residential Mortgage Reserve [Member]
Commitments Contingencies And Guarantees [Line Items]
Unpaid principal balance outstanding of loans sold	$ 6,400
Maximum potential amount of undiscounted future payments possibly required as percentage of principal balance of loans outstanding	30.00%
Liability for estimated repurchase obligations on loans sold	$ 7
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	15 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, 2020	Mar. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 17,038
Other comprehensive income before reclassification, net of income taxes	810	$ 266
Amounts reclassified from AOCI, net of income taxes	(22)	22
Total other comprehensive income (loss), net of tax	788	288
Ending Balance	17,411
Unrealized Gains (Losses) on Securities Available for Sale [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	115	(373)
Other comprehensive income before reclassification, net of income taxes	408	184
Amounts reclassified from AOCI, net of income taxes	(3)	0
Total other comprehensive income (loss), net of tax	405	184
Ending Balance	520	(189)
Unrealized Gains (Losses) on Derivative Financial Instruments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	250	(50)
Other comprehensive income before reclassification, net of income taxes	402	80
Amounts reclassified from AOCI, net of income taxes	(25)	19
Total other comprehensive income (loss), net of tax	377	99
Ending Balance	627	49
Foreign Currency Translation Adjustment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	0	(14)
Other comprehensive income before reclassification, net of income taxes	0	3
Amounts reclassified from AOCI, net of income taxes	0	0
Total other comprehensive income (loss), net of tax	0	3
Ending Balance	0	(11)
Net Pension and Postretirement Benefit Costs [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(339)	(381)
Other comprehensive income before reclassification, net of income taxes	0	(1)
Amounts reclassified from AOCI, net of income taxes	6	3
Total other comprehensive income (loss), net of tax	6	2
Ending Balance	(333)	(379)
AOCI Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	26	(818)
Total other comprehensive income (loss), net of tax	788	288
Ending Balance	$ 814	$ (530)

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income	[1]	$ (88)	$ 10
Interest income — Loans		1,026	1,066
Interest expense — Long-term debt		(90)	(120)
Income (loss) from continuing operations before income taxes		176	496
Income taxes		23	82
Other expense		515	563
INCOME (LOSS) FROM CONTINUING OPERATIONS		145	406
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Securities Available for Sale [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income		4	0
Income (loss) from continuing operations before income taxes		4	0
Income taxes		1	0
INCOME (LOSS) FROM CONTINUING OPERATIONS		3	0
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		33	(25)
Income taxes		8	(6)
INCOME (LOSS) FROM CONTINUING OPERATIONS		25	(19)
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		(8)	(4)
Income taxes		(2)	(1)
INCOME (LOSS) FROM CONTINUING OPERATIONS		(6)	(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]
Other expense		(4)	(4)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Pension and Postretirement Benefit Costs [Member] | Settlement Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense		(4)	0
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		34	(24)
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)
[1]	For the three months ended March 31, 2020 , net securities gains (losses) totaled $4 million . For the three months ended March 31, 2019 , net securities gains (losses) totaled less than $1 million . For the three months ended March 31, 2020 , and March 31, 2019 , Key did no t have any impairment losses related to securities.

Shareholders' Equity - Comprehe

Shareholders' Equity - Comprehensive Capital Plan (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Repurchase of common shares	$ 117,000,000	$ 167,000,000
Cash dividends declared on common shares (in usd per share)	$ 0.185	$ 0.17
2019 Capital Plan [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Authorized amount of share repurchases	$ 1,000,000,000
Common shares repurchased, value	152,000,000
Repurchase of common shares	117,000,000
Employee equity compensation program Common Share repurchases (less than)	$ 1,000,000
Cash dividends declared on common shares (in usd per share)	$ 0.185

Shareholders' Equity - Schedule

Shareholders' Equity - Schedule of Preferred Stock (Details)	Mar. 31, 2020USD ($)$ / 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
Series G Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, amount outstanding | $	$ 450,000,000
Preferred stock, shares authorized (in shares) | shares	450,000
Preferred stock, shares outstanding (in shares) | shares	450,000
Preferred stock, par value (in usd per share)	$ 1
Preferred stock, liquidation preference, value | $	$ 1,000
Depository Shares, Series G [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)	$ 0.351563

Business Segment Reporting - Ad

Business Segment Reporting - Additional Information (Details) $ in Millions	Mar. 31, 2020USD ($)Branchindustry_sector	Dec. 31, 2019USD ($)
Segment Reporting Information [Line Items]
Goodwill | $	$ 2,664	$ 2,664
Consumer Bank [Member]
Segment Reporting Information [Line Items]
Number Of State Branch Network | Branch	15
Commercial Bank [Member]
Segment Reporting Information [Line Items]
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, 2020USD ($)employee	Mar. 31, 2019USD ($)employee
SUMMARY OF OPERATIONS
Net interest income (TE)	$ 989	$ 985
Noninterest income	477	536
Total revenue (TE)	1,466	1,521
Provision for credit losses	359	62
Depreciation and amortization expense	92	88
Other noninterest expense	839	875
Income (loss) from continuing operations before income taxes (TE)	176	496
Allocated income taxes and TE adjustments	31	90
INCOME (LOSS) FROM CONTINUING OPERATIONS	145	406
Income (loss) from discontinued operations, net of taxes	1	1
NET INCOME (LOSS)	146	407
Less: Net income (loss) attributable to noncontrolling interests	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY	146	407
AVERAGE BALANCES
Loans and leases	96,174	89,649
Total assets	146,228	140,120
Deposits	110,328	107,576
OTHER FINANCIAL DATA
Net loan charge-offs	$ 84	$ 64
Return on average allocated equity, continuing operations	3.39%	10.49%
Return on average allocated equity	3.41%	10.51%
Average full-time equivalent employees | employee	16,529	17,554
Operating Segments [Member] | Consumer Bank [Member]
SUMMARY OF OPERATIONS
Net interest income (TE)	$ 590	$ 591
Noninterest income	230	214
Total revenue (TE)	820	805
Provision for credit losses	140	45
Depreciation and amortization expense	21	23
Other noninterest expense	522	517
Income (loss) from continuing operations before income taxes (TE)	137	220
Allocated income taxes and TE adjustments	32	52
INCOME (LOSS) FROM CONTINUING OPERATIONS	105	168
Income (loss) from discontinued operations, net of taxes	0	0
NET INCOME (LOSS)	105	168
Less: Net income (loss) attributable to noncontrolling interests	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY	105	168
AVERAGE BALANCES
Loans and leases	35,197	31,321
Total assets	38,460	34,732
Deposits	73,320	71,288
OTHER FINANCIAL DATA
Net loan charge-offs	$ 43	$ 34
Return on average allocated equity, continuing operations	12.18%	21.27%
Return on average allocated equity	12.18%	21.27%
Average full-time equivalent employees | employee	8,907	9,622
Operating Segments [Member] | Commercial Bank [Member]
SUMMARY OF OPERATIONS
Net interest income (TE)	$ 410	$ 402
Noninterest income	219	300
Total revenue (TE)	629	702
Provision for credit losses	214	16
Depreciation and amortization expense	36	29
Other noninterest expense	317	344
Income (loss) from continuing operations before income taxes (TE)	62	313
Allocated income taxes and TE adjustments	(8)	63
INCOME (LOSS) FROM CONTINUING OPERATIONS	70	250
Income (loss) from discontinued operations, net of taxes	0	0
NET INCOME (LOSS)	70	250
Less: Net income (loss) attributable to noncontrolling interests	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY	70	250
AVERAGE BALANCES
Loans and leases	60,082	57,267
Total assets	69,383	64,873
Deposits	36,058	34,417
OTHER FINANCIAL DATA
Net loan charge-offs	$ 40	$ 30
Return on average allocated equity, continuing operations	6.00%	22.60%
Return on average allocated equity	6.00%	22.60%
Average full-time equivalent employees | employee	2,069	2,370
Other [Member]
SUMMARY OF OPERATIONS
Net interest income (TE)	$ (11)	$ (8)
Noninterest income	28	22
Total revenue (TE)	17	14
Provision for credit losses	5	1
Depreciation and amortization expense	35	36
Other noninterest expense	0	14
Income (loss) from continuing operations before income taxes (TE)	(23)	(37)
Allocated income taxes and TE adjustments	7	(25)
INCOME (LOSS) FROM CONTINUING OPERATIONS	(30)	(12)
Income (loss) from discontinued operations, net of taxes	1	1
NET INCOME (LOSS)	(29)	(11)
Less: Net income (loss) attributable to noncontrolling interests	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO KEY	(29)	(11)
AVERAGE BALANCES
Loans and leases	895	1,061
Total assets	38,385	40,515
Deposits	950	1,871
OTHER FINANCIAL DATA
Net loan charge-offs	$ 1	$ 0
Return on average allocated equity, continuing operations	(1.33%)	(0.61%)
Return on average allocated equity	(1.29%)	(0.56%)
Average full-time equivalent employees | employee	5,553	5,562

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 309	$ 292
Noninterest income	477	536
Contract assets	0	0
Contract liabilities	0	0
Trust And Investment Services Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	112	100
Investment Banking And Debt Placement Fees [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	47	45
Service Charges On Deposit Accounts [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	84	81
Cards And Payments Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	64	63
Other Noninterest Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2	3
Noninterest income	140	222
Operating Segments [Member] | Consumer Bank [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	189	179
Operating Segments [Member] | Consumer Bank [Member] | Trust And Investment Services Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	93	85
Operating Segments [Member] | Consumer Bank [Member] | Investment Banking And Debt Placement Fees [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0
Operating Segments [Member] | Consumer Bank [Member] | Service Charges On Deposit Accounts [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	56	54
Operating Segments [Member] | Consumer Bank [Member] | Cards And Payments Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	38	37
Operating Segments [Member] | Consumer Bank [Member] | Other Noninterest Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	2	3
Operating Segments [Member] | Commercial Bank [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	120	113
Operating Segments [Member] | Commercial Bank [Member] | Trust And Investment Services Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	19	15
Operating Segments [Member] | Commercial Bank [Member] | Investment Banking And Debt Placement Fees [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	47	45
Operating Segments [Member] | Commercial Bank [Member] | Service Charges On Deposit Accounts [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	28	27
Operating Segments [Member] | Commercial Bank [Member] | Cards And Payments Income [Member]
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	26	26
Operating Segments [Member] | Commercial 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	$ 28	$ 22

Uncategorized Items - key-33120

Label	Element	Value
Commercial Real Estate [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	$ 174,000,000
Commercial Real Estate Commercial Mortgage [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	159,000,000
Consumer Credit Card [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	82,000,000
Real Estate Residential Mortgage [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss	us-gaap_FinancingReceivableAllowanceForCreditLosses	$ 84,000,000