Reserve for Future Policy Benefits and Contractholder Funds - Schedule of Contractholder Funds Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Contractholder funds activity
Beginning balance	$ 879	$ 890	$ 857
Deposits	130	133	118
Interest credited	34	32	34
Benefits	(14)	(21)	(41)
Surrenders and partial withdrawals	(21)	(28)	(23)
Contract charges	(119)	(117)	(111)
Other adjustments	(1)	(10)	56
Ending balance	888	879	890
Components of contractholder funds	$ 888	$ 879	$ 890
Weighted-average crediting rate	4.21%	4.28%	4.29%
Net amount at risk	$ 11,359	$ 11,610	$ 11,682
Cash surrender value	726	719	725
Interest- sensitive life
Contractholder funds activity
Beginning balance	829	835
Ending balance	842	829	835
Components of contractholder funds	842	829	835
Fixed annuities
Contractholder funds activity
Beginning balance	50	55
Ending balance	46	50	55
Components of contractholder funds	$ 46	$ 50	$ 55