Other Additional Liability Rollforward (Details) - Universal life - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Jun. 30, 2023	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Additional Liability, Long-Duration Insurance [Roll Forward]
Balance, beginning of period	$ 122	$ 122	$ 121	$ 133
Balance, beginning of period before shadow reserve adjustments					$ 124	$ 123	$ 123	$ 131
Effect of changes in cash flow assumptions					0	(5)	0	(2)
Effect of actual variances from expected experience					2	1	1	6
Adjusted beginning of period balance					126	119	124	135
Interest accrual	1	1	3	3
Excess death benefits	(4)	(2)	(6)	(14)
Attributed assessments	3	3	9	9
Effect of changes in interest rate assumptions	(5)	(4)	(4)	(11)
Balance, end of period before shadow reserve adjustments	121	122	121	122
Shadow reserve adjustments	(2)	(3)	(2)	(3)
Balance, end of period	119	119	119	119	$ 122	$ 121	$ 122	$ 133
Less reinsurance recoverable, end of period	7	5	7	5
Net other additional liability, after reinsurance recoverable	$ 126	$ 124	$ 126	$ 124
Weighted-average duration of the other additional liability in years	32 years	34 years	32 years	34 years