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	$ 369,678	$ 274,575
Gross amount of recognized assets	18,644	15,003
Gross amount of recognized liabilities	22,297	16,875
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	86,648
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,281
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	277,748
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1
Qualifying Hedges | Cash flow hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,994	5,968
Gross amount of recognized assets	424	712
Gross amount of recognized liabilities	137	60
Qualifying Hedges | Cash flow hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,075	1,230
Gross amount of recognized assets	20	156
Gross amount of recognized liabilities	3	16
Qualifying Hedges | Cash flow hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,919	4,738
Gross amount of recognized assets	404	556
Gross amount of recognized liabilities	134	44
Qualifying Hedges | Fair value hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,220	1,091
Gross amount of recognized assets	1	11
Gross amount of recognized liabilities	33	16
Qualifying Hedges | Fair value hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,195	1,066
Gross amount of recognized assets	1	10
Gross amount of recognized liabilities	31	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	84,378	75,445
Gross amount of recognized assets	80	63
Gross amount of recognized liabilities	361	439
Non-Qualifying Hedges | Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	337	348
Gross amount of recognized assets	16	30
Gross amount of recognized liabilities	5	2
Non-Qualifying Hedges | Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	277,748	191,666
Gross amount of recognized assets	16,790	13,072
Gross amount of recognized liabilities	6,489	3,879
Non-Qualifying Hedges | Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1	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	354	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	1,333	1,115
Gross amount of recognized liabilities	$ 14,918	$ 12,449