Other Additional Liability Rollforward (Details) - Universal life - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Additional Liability, Long-Duration Insurance [Roll Forward]
Balance, beginning of period	$ 125	$ 127	$ 121	$ 133
Balance, beginning of period before shadow reserve adjustments					$ 127	$ 123	$ 127	$ 131
Effect of changes in cash flow assumptions					(5)	(5)	(2)	(2)
Effect of actual variances from expected experience					0	(1)	2	5
Adjusted beginning of period balance					122	117	127	134
Interest accrual	1	1	2	2
Excess death benefits	(2)	(4)	(2)	(12)
Attributed assessments	3	3	6	6
Effect of changes in interest rate assumptions	0	(4)	1	(7)
Balance, end of period before shadow reserve adjustments	124	123	124	123
Shadow reserve adjustments	(2)	(1)	(2)	(1)
Balance, end of period	122	122	122	122	$ 125	$ 121	$ 127	$ 133
Less reinsurance recoverable, end of period	7	6	7	6
Net other additional liability, after reinsurance recoverable	$ 129	$ 128	$ 129	$ 128
Weighted-average duration of the other additional liability in years	32 years	35 years	32 years	35 years