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	$ 325,799	$ 322,099
Fair Value, Asset	18,321	12,965
Fair Value, Liability	18,968	14,454
Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,577	5,147
Fair Value, Asset	450	434
Fair Value, Liability	87	125
Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	460	475
Fair Value, Asset	1	1
Fair Value, Liability	43	40
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	70,181
Interest rate contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	68,999	90,829
Fair Value, Asset	54	636
Fair Value, Liability	230	979
Interest rate contracts | Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	747	485
Fair Value, Asset	18	11
Fair Value, Liability	4	47
Interest rate contracts | Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	435	450
Fair Value, Asset	1	1
Fair Value, Liability	42	39
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,200
Foreign currency contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	345	306
Fair Value, Asset	11	11
Fair Value, Liability	6	6
Foreign currency contracts | Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,830	4,662
Fair Value, Asset	432	423
Fair Value, Liability	83	78
Foreign currency contracts | Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	25	25
Fair Value, Asset	0	0
Fair Value, Liability	1	1
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	250,306
Equity market contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	250,306	225,251
Fair Value, Asset	15,539	10,244
Fair Value, Liability	6,332	4,227
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	112
Credit contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	112	91
Fair Value, Asset	0	0
Fair Value, Liability	0	0
LPR ceded derivative | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Fair Value, Asset	202	206
Fair Value, Liability	0	0
Reinsurance-related | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Fair Value, Asset	103	493
Fair Value, Liability	0	0
RILA, fixed indexed annuity and IUL contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Fair Value, Asset	1,961	940
Fair Value, Liability	$ 12,270	$ 9,077