Derivative Instruments - Outstanding Derivative Instruments With Off-Balance-Sheet Risks (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 272,851	$ 322,099
Gross amount of recognized assets	16,620	12,965
Gross amount of recognized liabilities	16,845	14,454
Cash flow hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,370	5,147
Gross amount of recognized assets	558	434
Gross amount of recognized liabilities	60	125
Fair value hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	460	475
Gross amount of recognized assets	9	1
Gross amount of recognized liabilities	16	40
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	76,512
Interest rate contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	75,445	90,829
Gross amount of recognized assets	63	636
Gross amount of recognized liabilities	439	979
Interest rate contracts | Cash flow hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	632	485
Gross amount of recognized assets	2	11
Gross amount of recognized liabilities	16	47
Interest rate contracts | Fair value hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	435	450
Gross amount of recognized assets	8	1
Gross amount of recognized liabilities	16	39
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,111
Foreign currency contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	348	306
Gross amount of recognized assets	30	11
Gross amount of recognized liabilities	2	6
Foreign currency contracts | Cash flow hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,738	4,662
Gross amount of recognized assets	556	423
Gross amount of recognized liabilities	44	78
Foreign currency contracts | Fair value hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	25	25
Gross amount of recognized assets	1	0
Gross amount of recognized liabilities	0	1
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	191,171
Equity market contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	191,171	225,251
Gross amount of recognized assets	13,072	10,244
Gross amount of recognized liabilities	3,879	4,227
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	57
Credit contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	57	91
Gross amount of recognized assets	0	0
Gross amount of recognized liabilities	0	0
LPR ceded derivative | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Gross amount of recognized assets	190	206
Gross amount of recognized liabilities	0	0
Reinsurance-related | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Gross amount of recognized assets	728	493
Gross amount of recognized liabilities	0	0
Indexed annuity ceded embedded derivatives | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Gross amount of recognized assets	1,970	940
Gross amount of recognized liabilities	$ 12,449	$ 9,077