Market Risk Benefits - Rollforward of market risk benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 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	200	45
Interest accrual	42	45
Attributed fees	252	216
Expected claims	(26)	(13)
Effect of changes in interest rates	524	(1,506)
Effect of changes in interest rate volatility	(77)	185
Effect of changes in equity markets	(427)	403
Effect of changes in equity index volatility	13	(1)
Actual outcome different from model expected outcome	73	121
Effect of changes in future expected policyholder behavior	0	0
Effect of changes in other future expected assumptions	(112)
Other, including foreign exchange	1	(2)
Balance, end of period, before effect of changes in our own credit risk	4,032	4,426
Effect of changes in our own credit risk	371	1,109
Balance, end of period	4,403	5,535
Less: Reinsured MRB, end of period	(89)	(120)
Net	4,314	5,415
Combined
Net amount at risk
Net amount at risk	1,757	768
GMDB
Net amount at risk
Net amount at risk	1,573	1,089
GMWB
Net amount at risk
Net amount at risk	68	294
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	191	40
Interest accrual	38	39
Attributed fees	235	197
Expected claims	(25)	(13)
Effect of changes in interest rates	478	(1,381)
Effect of changes in interest rate volatility	(73)	172
Effect of changes in equity markets	(391)	387
Effect of changes in equity index volatility	16	(2)
Actual outcome different from model expected outcome	72	105
Effect of changes in future expected policyholder behavior	0	0
Effect of changes in other future expected assumptions	(94)
Other, including foreign exchange	1	1
Balance, end of period, before effect of changes in our own credit risk	3,745	4,063
Effect of changes in our own credit risk	339	1,027
Balance, end of period	4,084	5,090
Less: Reinsured MRB, end of period	(89)	(120)
Net	$ 3,995	$ 4,970
Net amount at risk
Average attained age of contract holders by product	71 years	70 years
Individual Retirement | Combined
Net amount at risk
Net amount at risk	$ 1,726	$ 752
Individual Retirement | GMDB
Net amount at risk
Net amount at risk	1,307	903
Individual Retirement | GMWB
Net amount at risk
Net amount at risk	63	264
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	9	5
Interest accrual	4	6
Attributed fees	17	19
Expected claims	(1)	0
Effect of changes in interest rates	46	(125)
Effect of changes in interest rate volatility	(4)	13
Effect of changes in equity markets	(36)	16
Effect of changes in equity index volatility	(3)	1
Actual outcome different from model expected outcome	1	16
Effect of changes in future expected policyholder behavior	0	0
Effect of changes in other future expected assumptions	(18)
Other, including foreign exchange	0	(3)
Balance, end of period, before effect of changes in our own credit risk	287	363
Effect of changes in our own credit risk	32	82
Balance, end of period	319	445
Less: Reinsured MRB, end of period	0	0
Net	$ 319	$ 445
Net amount at risk
Average attained age of contract holders by product	64 years	63 years
Group Retirement | Combined
Net amount at risk
Net amount at risk	$ 31	$ 16
Group Retirement | GMDB
Net amount at risk
Net amount at risk	266	186
Group Retirement | GMWB
Net amount at risk
Net amount at risk	$ 5	$ 30