Derivative Instruments - Outstanding Derivative Instruments With Off-Balance-Sheet Risks (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 368,559	$ 272,851
Fair Value, Asset	20,023	16,620
Fair Value, Liability	21,934	16,845
Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,994	5,370
Fair Value, Asset	424	558
Fair Value, Liability	137	60
Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	589	460
Fair Value, Asset	1	9
Fair Value, Liability	24	16
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	86,017
Interest rate contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	84,378	75,445
Fair Value, Asset	80	63
Fair Value, Liability	361	439
Interest rate contracts | Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,075	632
Fair Value, Asset	20	2
Fair Value, Liability	3	16
Interest rate contracts | Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	564	435
Fair Value, Asset	1	8
Fair Value, Liability	22	16
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,281
Foreign currency contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	337	348
Fair Value, Asset	16	30
Fair Value, Liability	5	2
Foreign currency contracts | Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,919	4,738
Fair Value, Asset	404	556
Fair Value, Liability	134	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	277,260
Equity market contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	277,260	191,171
Fair Value, Asset	16,790	13,072
Fair Value, Liability	6,489	3,879
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1
Credit contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1	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	204	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	188	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	2,320	1,970
Fair Value, Liability	$ 14,918	$ 12,449