Other Additional Liability Rollforward (Details) - Universal life - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Additional Liability, Long-Duration Insurance [Roll Forward]
Balance, beginning of period	$ 121	$ 133
Balance, beginning of period before shadow reserve adjustments			$ 123	$ 131
Effect of changes in cash flow assumptions			0	0
Effect of actual variances from expected experience			(1)	3
Adjusted beginning of period balance			122	134
Interest accrual	1	1
Excess death benefits	0	(8)
Attributed assessments	3	3
Effect of changes in interest rate assumptions	1	(3)
Balance, end of period before shadow reserve adjustments	127	127
Shadow reserve adjustments	(2)	0
Balance, end of period	125	127	$ 121	$ 133
Less reinsurance recoverable, end of period	6	5
Net other additional liability, after reinsurance recoverable	$ 131	$ 132
Weighted-average duration of the other additional liability	34 years	35 years