Other Additional Liability Rollforward (Details) - Universal Life - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Additional Liability, Long-Duration Insurance [Roll Forward]
Balance, beginning of period	$ 121	$ 133	$ 116
Balance, beginning of period before shadow reserve adjustments	123	131	113
Effect of changes in cash flow assumptions	(6)	(1)	4
Effect of actual variances from expected experience	0	6	0
Adjusted beginning of period balance	117	136	117
Interest accrual	4	4	4
Excess death benefits	(6)	(18)	(4)
Attributed assessments	12	12	12
Effect of changes in interest rate assumptions	2	(11)	2
Balance, end of period before shadow reserve adjustments	129	123	131
Shadow reserve adjustments	1	2	(2)
Balance, end of period	128	121	133
Less reinsurance recoverable, end of period	6	5	3
Net other additional liability, after reinsurance recoverable	$ 134	$ 126	$ 136
Weighted-average duration of the other additional liability	32 years	34 years	35 years