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	$ 310,850	$ 274,575
Gross amount of recognized assets	15,249	15,003
Gross amount of recognized liabilities	19,056	16,875
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	84,470
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,251
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	221,067
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	62
Qualifying Hedges | Cash flow hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	6,526	5,968
Gross amount of recognized assets	474	712
Gross amount of recognized liabilities	158	60
Qualifying Hedges | Cash flow hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,638	1,230
Gross amount of recognized assets	143	156
Gross amount of recognized liabilities	4	16
Qualifying Hedges | Cash flow hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,888	4,738
Gross amount of recognized assets	331	556
Gross amount of recognized liabilities	154	44
Qualifying Hedges | Fair value hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,235	1,091
Gross amount of recognized assets	2	11
Gross amount of recognized liabilities	23	16
Qualifying Hedges | Fair value hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,210	1,066
Gross amount of recognized assets	2	10
Gross amount of recognized liabilities	21	16
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	1
Gross amount of recognized liabilities	2	0
Non-Qualifying Hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	81,622	75,445
Gross amount of recognized assets	42	63
Gross amount of recognized liabilities	428	439
Non-Qualifying Hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	338	348
Gross amount of recognized assets	14	30
Gross amount of recognized liabilities	7	2
Non-Qualifying Hedges | Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	221,067	191,666
Gross amount of recognized assets	13,481	13,072
Gross amount of recognized liabilities	5,211	3,879
Non-Qualifying Hedges | Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	62	57
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	140	30
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	1,236	1,115
Gross amount of recognized liabilities	$ 13,089	$ 12,449