Separate Account Balances and Changes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 892
Balance, end of period	925	$ 892
Universal Life
Separate Account, Liability [Roll Forward]
Balance, beginning of period	892	959	$ 952
Interest credited before policy charges	42	38	37
Change in unrealized gains and losses impacting separate account liabilities	0	(85)	(22)
Benefit payments	(10)	(15)	(6)
Other	1	(5)	(2)
Balance, end of period	925	892	959
Cash surrender value	$ 917	$ 890	$ 870