Derivative Financial Instruments - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Offsetting Assets and liabilities [Line Items]
Asset Fair Value	$ 349	$ 321
Liability Fair Value	346	331
Counterparty netting, Assets	(306)	(263)
Counterparty netting, Liabilities	(306)	(263)
Cash collateral netting, Assets	(37)	(51)
Cash collateral netting, Liabilities	(36)	(64)
Securities collateral netting, Assets	(5)	(6)
Securities collateral netting, Liabilities	(4)	(1)
Net receivables	1	1
Net payables	0	3
Foreign exchange contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	675	641
Asset Fair Value	47	60
Liability Fair Value	3	2
Interest rate contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	18,692	8,736
Asset Fair Value	302	261
Liability Fair Value	340	327
Credit contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	138	141
Asset Fair Value	0	0
Liability Fair Value	$ 3	$ 2

Amount of obligation to return cash collateral under master netting arrangements offset against derivative assets.

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, after effect of master netting arrangement and deduction of obligation to return financial collateral not offset and financial instrument subject to master netting arrangement not offset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative not subject to master netting arrangement or similar agreement.

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Amount of right to receive cash collateral under master netting arrangements offset against derivative liabilities.

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Nominal or face amount used to calculate payment on derivative.

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[Line Items] for Offsetting Assets and Liabilities [Table]

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