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	$ 324,318	$ 257,459
Gross amount of recognized assets	12,436	7,594
Gross amount of recognized liabilities	15,006	8,052
Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	93,608
Foreign currency contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	4,993
Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	225,626
Credit contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	91
Qualifying Hedges | Cash flow hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	6,360	6,973
Gross amount of recognized assets	604	766
Gross amount of recognized liabilities	125	250
Qualifying Hedges | Cash flow hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,698	2,590
Gross amount of recognized assets	181	123
Gross amount of recognized liabilities	47	232
Qualifying Hedges | Cash flow hedges | Foreign currency contracts
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
Qualifying Hedges | Fair value hedges
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,106	1,155
Gross amount of recognized assets	1	2
Gross amount of recognized liabilities	40	44
Qualifying Hedges | Fair value hedges | Interest rate contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	1,081	1,155
Gross amount of recognized assets	1	2
Gross amount of recognized liabilities	39	44
Qualifying Hedges | Fair value hedges | Foreign currency contracts
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
Non-Qualifying Hedges | Interest rate contracts
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
Non-Qualifying Hedges | Foreign currency contracts
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
Non-Qualifying Hedges | Equity market contracts
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	225,626	142,946
Gross amount of recognized assets	10,244	5,135
Gross amount of recognized liabilities	4,227	2,035
Non-Qualifying Hedges | Commodity contracts
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
Non-Qualifying Hedges | Credit contracts
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
Non-Qualifying Hedges | Reinsurance-related
Outstanding derivative instruments with off-balance-sheet risks
Notional Amounts	0	0
Gross amount of recognized assets	0	416
Gross amount of recognized liabilities	552	0
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	940	525
Gross amount of recognized liabilities	$ 9,077	$ 4,783