Derivative Instruments - Outstanding Derivative Instruments With Off-Balance-Sheet Risks (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 327,512	$ 324,318
Gross amount of recognized assets	17,275	12,436
Gross amount of recognized liabilities	19,645	15,006
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	71,410
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,200
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	250,790
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	112
Qualifying Hedges | Cash flow hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	6,175	6,360
Gross amount of recognized assets	538	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	1,345	1,698
Gross amount of recognized assets	106	181
Gross amount of recognized liabilities	5	47
Qualifying Hedges | Cash flow hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,830	4,662
Gross amount of recognized assets	432	423
Gross amount of recognized liabilities	83	78
Qualifying Hedges | Fair value hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,091	1,106
Gross amount of recognized assets	1	1
Gross amount of recognized liabilities	51	40
Qualifying Hedges | Fair value hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,066	1,081
Gross amount of recognized assets	1	1
Gross amount of recognized liabilities	50	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	1	1
Non-Qualifying Hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	68,999	90,829
Gross amount of recognized assets	54	636
Gross amount of recognized liabilities	230	979
Non-Qualifying Hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	345	306
Gross amount of recognized assets	11	11
Gross amount of recognized liabilities	6	6
Non-Qualifying Hedges | Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	250,790	225,626
Gross amount of recognized assets	15,539	10,244
Gross amount of recognized liabilities	6,332	4,227
Non-Qualifying Hedges | Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	112	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	668	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	1,132	940
Gross amount of recognized liabilities	$ 12,270	$ 9,077