Derivative Instruments - Outstanding Derivative Instruments With Off-Balance-Sheet Risks (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 259,142	$ 329,918
Fair Value, Asset	16,681	18,915
Fair Value, Liability	18,716	21,259
Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	6,544	6,222
Fair Value, Asset	480	392
Fair Value, Liability	97	132
Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	442	442
Fair Value, Asset	1	1
Fair Value, Liability	1	2
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	90,006
Interest rate contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	88,019	84,814
Fair Value, Asset	124	64
Fair Value, Liability	326	321
Interest rate contracts | Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,570	1,300
Fair Value, Asset	8	12
Fair Value, Liability	10	7
Interest rate contracts | Fair value hedges: | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	417	417
Fair Value, Asset	1	1
Fair Value, Liability	0	0
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,321
Foreign currency contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	322	289
Fair Value, Asset	14	12
Fair Value, Liability	3	4
Foreign currency contracts | Change in foreign currency exchange rate adjustment | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,974	4,922
Fair Value, Asset	472	380
Fair Value, Liability	87	125
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	2
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	163,576
Equity market contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	163,576	238,134
Fair Value, Asset	12,886	15,560
Fair Value, Liability	4,845	5,685
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	239
Credit contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	239	17
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	169	202
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	536	202
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	2,471	2,482
Fair Value, Liability	$ 13,444	$ 15,115