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Financing Receivable, Before Allowance For Credit Losses, Consumer Installments

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Year in which contingent commitments to qualified affordable housing project investments are expected to be paid, in YYYY format.

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Amount of investment in qualified affordable housing projects.

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Face (par) amount of debt instrument at time of issuance.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates.

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Variable Interest Entities - Additional Information (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) investment	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)	Aug. 31, 2023 USD ($)
Secured Debt [Member]
Variable Interest Entity
Principal amount				$ 79
LLCs designed for the purpose of purchasing pools of residual interests in leases
Variable Interest Entity
Number of co-investments \| investment	3
Ownership percentage (more than)	50.00%
Variable Interest Entity, Not Primary Beneficiary \| Loans provided to VIEs
Variable Interest Entity
Unfunded commitment amounts	$ 2,300		$ 2,100
Variable Interest Entity, Not Primary Beneficiary \| CDC investments
Variable Interest Entity
CDC investments	1,800		1,600
Unfunded commitments in qualifying LIHTC investments	$ 665		684
Variable Interest Entity, Not Primary Beneficiary \| CDC investments \| Minimum
Variable Interest Entity
Unfunded commitments, year expected to be funded	2024
Variable Interest Entity, Not Primary Beneficiary \| CDC investments \| Maximum
Variable Interest Entity
Unfunded commitments, year expected to be funded	2040
Variable Interest Entity, Not Primary Beneficiary \| Private equity investments
Variable Interest Entity
Unfunded commitment amounts	$ 166		$ 170
Capital contribution to private equity investments	$ 14	$ 12
Variable Interest Entity, Primary Beneficiary \| Secured Debt [Member]
Variable Interest Entity
Principal amount				1,580
Variable Interest Entity, Primary Beneficiary \| Automobile loan
Variable Interest Entity
Indirect secured consumer loans				$ 1,740