Separate Account Balances and Changes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 925
Balance, end of period	927
Universal life
Separate Account, Liability [Roll Forward]
Balance, beginning of period	925	$ 892
Interest credited before policy charges	10	10
Benefit payments	0	(2)
Other	(8)	(1)
Balance, end of period	927	899
Cash surrender value	$ 925	$ 896