Reserve for Future Policy Benefits and Contractholder Funds - Schedule of Contractholder Funds Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Contractholder funds activity
Beginning balance	$ 888	$ 879	$ 890
Deposits	129	130	133
Interest credited	34	34	32
Benefits	(13)	(14)	(21)
Surrenders and partial withdrawals	(25)	(21)	(28)
Contract charges	(118)	(119)	(117)
Other adjustments	(5)	(1)	(10)
Ending balance	890	888	879
Components of contractholder funds	$ 890	$ 888	$ 879
Weighted-average crediting rate	4.23%	4.21%	4.28%
Net amount at risk	$ 10,735	$ 11,359	$ 11,610
Cash surrender value	740	726	719
Interest-sensitive life insurance
Contractholder funds activity
Beginning balance	842	829
Ending balance	851	842	829
Components of contractholder funds	851	842	829
Fixed annuities
Contractholder funds activity
Beginning balance	46	50
Ending balance	39	46	50
Components of contractholder funds	$ 39	$ 46	$ 50