Derivative Instruments - Outstanding Derivative Instruments With Off-Balance-Sheet Risks (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	$ 322,099	$ 255,322
Gross amount of recognized assets	12,965	7,952
Gross amount of recognized liabilities	14,454	8,052
Cash flow hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	5,147	5,760
Gross amount of recognized assets	434	647
Gross amount of recognized liabilities	125	250
Fair value hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	475	524
Gross amount of recognized assets	1	2
Gross amount of recognized liabilities	40	44
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	91,764
Interest rate contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	90,829	105,977
Gross amount of recognized assets	636	709
Gross amount of recognized liabilities	979	935
Interest rate contracts | Cash flow hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	485	1,377
Gross amount of recognized assets	11	4
Gross amount of recognized liabilities	47	232
Interest rate contracts | Fair value hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	450	524
Gross amount of recognized assets	1	2
Gross amount of recognized liabilities	39	44
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,993
Foreign currency contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	306	395
Gross amount of recognized assets	11	27
Gross amount of recognized liabilities	6	2
Foreign currency contracts | Cash flow hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,662	4,383
Gross amount of recognized assets	423	643
Gross amount of recognized liabilities	78	18
Foreign currency contracts | Fair value hedges | Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	25	0
Gross amount of recognized assets	0	0
Gross amount of recognized liabilities	1	0
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	225,251
Equity market contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	225,251	142,653
Gross amount of recognized assets	10,244	5,135
Gross amount of recognized liabilities	4,227	2,035
Commodity contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	13
Gross amount of recognized assets	0	14
Gross amount of recognized liabilities	0	3
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	91
Credit contracts | Non-Qualifying Hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	91	0
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	206	212
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	493	681
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	940	525
Gross amount of recognized liabilities	$ 9,077	$ 4,783