Market Risk Benefits - Rollforward of market risk benefits (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Market Risk Benefit [Roll Forward]
Balance, beginning of year	$ 4,034	$ 7,034
Balance, beginning of year, before effect of changes in our own credit risk	3,569	4,933
Issuances	398	108
Interest accrual	86	94
Attributed fees	475	446
Expected claims	(49)	(29)
Effect of changes in interest rates	37	(3,134)
Effect of changes in interest rate volatility	(88)	192
Effect of changes in equity markets	(921)	1,694
Effect of changes in equity index volatility	4	(46)
Actual outcome different from model expected outcome	105	143
Effect of changes in other future expected assumptions	(123)
Other, including foreign exchange	(2)	(6)
Balance, end of period, before effect of changes in our own credit risk	3,491	4,395
Effect of changes in our own credit risk	611	375
Balance, end of period	4,102	4,770
Less: Reinsured MRB, end of period	(79)	(110)
Net	4,023	4,660
Combined
Net amount at risk
Net amount at risk	1,458	2,063
GMDB
Net amount at risk
Net amount at risk	1,280	2,224
GMWB
Net amount at risk
Net amount at risk	60	63
Individual Retirement
Market Risk Benefit [Roll Forward]
Balance, beginning of year	3,738	6,452
Balance, beginning of year, before effect of changes in our own credit risk	3,297	4,518
Issuances	379	97
Interest accrual	78	83
Attributed fees	442	409
Expected claims	(48)	(28)
Effect of changes in interest rates	34	(2,864)
Effect of changes in interest rate volatility	(84)	180
Effect of changes in equity markets	(843)	1,558
Effect of changes in equity index volatility	8	(42)
Actual outcome different from model expected outcome	93	130
Effect of changes in other future expected assumptions	(94)
Other, including foreign exchange	0	2
Balance, end of period, before effect of changes in our own credit risk	3,262	4,043
Effect of changes in our own credit risk	564	355
Balance, end of period	3,826	4,398
Less: Reinsured MRB, end of period	(79)	(110)
Net	$ 3,747	$ 4,288
Net amount at risk
Average attained age of contract holders by product	70 years	70 years
Individual Retirement | Combined
Net amount at risk
Net amount at risk	$ 1,435	$ 2,052
Individual Retirement | GMDB
Net amount at risk
Net amount at risk	1,068	1,828
Individual Retirement | GMWB
Net amount at risk
Net amount at risk	56	58
Group Retirement
Market Risk Benefit [Roll Forward]
Balance, beginning of year	296	582
Balance, beginning of year, before effect of changes in our own credit risk	272	415
Issuances	19	11
Interest accrual	8	11
Attributed fees	33	37
Expected claims	(1)	(1)
Effect of changes in interest rates	3	(270)
Effect of changes in interest rate volatility	(4)	12
Effect of changes in equity markets	(78)	136
Effect of changes in equity index volatility	(4)	(4)
Actual outcome different from model expected outcome	12	13
Effect of changes in other future expected assumptions	(29)
Other, including foreign exchange	(2)	(8)
Balance, end of period, before effect of changes in our own credit risk	229	352
Effect of changes in our own credit risk	47	20
Balance, end of period	276	372
Less: Reinsured MRB, end of period	0	0
Net	$ 276	$ 372
Net amount at risk
Average attained age of contract holders by product	64 years	64 years
Group Retirement | Combined
Net amount at risk
Net amount at risk	$ 23	$ 11
Group Retirement | GMDB
Net amount at risk
Net amount at risk	212	396
Group Retirement | GMWB
Net amount at risk
Net amount at risk	$ 4	$ 5