Represents the fair value of assets for which the fair value option was elected.

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Financing And Other Receivables, Allowance For Credit Loss And Off-Balance Sheet, Credit Loss, Liability

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Other Assets, Allowance for Credit Loss

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Accounting Policies - Impact of CECL Standard Adoption (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 01, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures	$ 450		$ 318
Other			0
Total allowance			3,060
Retained earnings	41,885		42,215
Income taxes	145	$ 248
Total commercial lending
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures	344		316
Total consumer lending
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures	$ 106		2
Cumulative Effect, Period of Adoption, Adjustment \| Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures				$ 179
Other				19
Total allowance			700	661
Retained earnings				(671)
Fair Value - Assets			200
Income taxes			$ 200
Cumulative Effect, Period of Adoption, Adjustment \| Total commercial lending \| Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures				53
Cumulative Effect, Period of Adoption, Adjustment \| Total consumer lending \| Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures				126
Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures				497
Other				19
Total allowance				3,721
Retained earnings				41,544
Cumulative Effect, Period of Adoption, Adjusted Balance \| Total commercial lending
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures				369
Cumulative Effect, Period of Adoption, Adjusted Balance \| Total consumer lending
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Off-balance sheet credit exposures				$ 128