Derivative Instruments - Outstanding Derivative Instruments With Off-Balance-Sheet Risks (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 311,720	$ 324,318
Gross amount of recognized assets	16,284	12,436
Gross amount of recognized liabilities	18,354	15,006
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	75,251
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,117
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	231,313
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	39
Qualifying Hedges | Cash flow hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	6,305	6,360
Gross amount of recognized assets	709	604
Gross amount of recognized liabilities	88	125
Qualifying Hedges | Cash flow hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,583	1,698
Gross amount of recognized assets	242	181
Gross amount of recognized liabilities	28	47
Qualifying Hedges | Cash flow hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,722	4,662
Gross amount of recognized assets	467	423
Gross amount of recognized liabilities	60	78
Qualifying Hedges | Fair value hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,101	1,106
Gross amount of recognized assets	2	1
Gross amount of recognized liabilities	32	40
Qualifying Hedges | Fair value hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,076	1,081
Gross amount of recognized assets	2	1
Gross amount of recognized liabilities	32	39
Qualifying Hedges | Fair value hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	25	25
Gross amount of recognized assets	0	0
Gross amount of recognized liabilities	0	1
Non-Qualifying Hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	72,592	90,829
Gross amount of recognized assets	771	636
Gross amount of recognized liabilities	1,027	979
Non-Qualifying Hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	370	306
Gross amount of recognized assets	13	11
Gross amount of recognized liabilities	3	6
Non-Qualifying Hedges | Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	231,313	225,626
Gross amount of recognized assets	13,816	10,244
Gross amount of recognized liabilities	5,953	4,227
Non-Qualifying Hedges | Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	39	91
Gross amount of recognized assets	0	0
Gross amount of recognized liabilities	0	0
Non-Qualifying Hedges | Reinsurance-related
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Gross amount of recognized assets	0	0
Gross amount of recognized liabilities	355	552
Non-Qualifying Hedges | RILA, fixed indexed annuity and IUL contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Gross amount of recognized assets	973	940
Gross amount of recognized liabilities	$ 10,896	$ 9,077