Derivative Financial Instruments - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Offsetting Assets and liabilities [Line Items]
Asset Fair Value	$ 270	$ 321
Liability Fair Value	318	331
Counterparty netting, Assets	(219)	(263)
Counterparty netting, Liabilities	(219)	(263)
Cash collateral netting, Assets	(44)	(51)
Cash collateral netting, Liabilities	(94)	(64)
Securities collateral netting, Assets	(6)	(6)
Securities collateral netting, Liabilities	(2)	(1)
Net receivables	1	1
Net payables	3	3
Foreign exchange contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	676	641
Asset Fair Value	50	60
Liability Fair Value	2	2
Interest rate contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	8,831	8,736
Asset Fair Value	220	261
Liability Fair Value	313	327
Credit contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	141	141
Asset Fair Value	0	0
Liability Fair Value	$ 3	$ 2

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

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