Derivative Financial Instruments - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Offsetting Assets and liabilities [Line Items]
Asset Fair Value	$ 175	$ 149
Liability Fair Value	210	144
Counterparty netting, Assets	(165)	(140)
Counterparty netting, Liabilities	(165)	(140)
Cash collateral netting, Assets	(6)	(7)
Cash collateral netting, Liabilities	(24)	(2)
Securities collateral netting, Assets	(3)	(2)
Securities collateral netting, Liabilities	(20)	(1)
Net receivables	1	0
Net payables	1	1
Foreign exchange contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	637	601
Asset Fair Value	17	14
Liability Fair Value	11	15
Interest rate contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	10,311	9,576
Asset Fair Value	158	135
Liability Fair Value	198	129
Credit contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	146	110
Asset Fair Value	0	0
Liability Fair Value	$ 1	$ 0

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

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