Derivative Financial Instruments - Offsetting Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Offsetting Assets and liabilities [Line Items]
Asset Fair Value	$ 149	$ 145
Counterparty netting, Assets	(140)	(141)
Cash collateral netting, Assets	(7)	(1)
Securities collateral netting, Assets	(2)	0
Net receivables	0	3
Liability Fair Value	144	216
Counterparty netting, Liabilities	(140)	(141)
Cash collateral netting, Liabilities	(2)	(43)
Securities collateral netting, Liabilities	(1)	(28)
Net payables	1	4
Equity contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	0	55
Asset Fair Value	0	5
Liability Fair Value	0	5
Foreign exchange contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	601	711
Asset Fair Value	14	3
Liability Fair Value	15	39
Interest rate contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	9,576	12,567
Asset Fair Value	135	137
Liability Fair Value	129	171
Credit contracts
Offsetting Assets and liabilities [Line Items]
Notional Amount	110	188
Asset Fair Value	0	0
Liability Fair Value	$ 0	$ 1

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

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