Derivative Instruments - Outstanding Derivative Instruments With Off-Balance-Sheet Risks (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 309,155	$ 272,851
Fair Value, Asset	16,685	16,620
Fair Value, Liability	18,917	16,845
Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,928	5,370
Fair Value, Asset	345	558
Fair Value, Liability	159	60
Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	604	460
Fair Value, Asset	1	9
Fair Value, Liability	23	16
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	83,241
Interest rate contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	81,622	75,445
Fair Value, Asset	42	63
Fair Value, Liability	428	439
Interest rate contracts | Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,040	632
Fair Value, Asset	14	2
Fair Value, Liability	5	16
Interest rate contracts | Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	579	435
Fair Value, Asset	1	8
Fair Value, Liability	21	16
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,251
Foreign currency contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	338	348
Fair Value, Asset	14	30
Fair Value, Liability	7	2
Foreign currency contracts | Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,888	4,738
Fair Value, Asset	331	556
Fair Value, Liability	154	44
Foreign currency contracts | Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	25	25
Fair Value, Asset	0	1
Fair Value, Liability	2	0
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	220,601
Equity market contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	220,601	191,171
Fair Value, Asset	13,481	13,072
Fair Value, Liability	5,211	3,879
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	62
Credit contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	62	57
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	198	190
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	470	728
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	2,134	1,970
Fair Value, Liability	$ 13,089	$ 12,449