Reinsurance (Effects of Affiliated Reinsurance on Statements of Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Premiums
Reinsurance assumed	$ 18	$ 20	$ 20
Universal life and investment-type product policy fees
Reinsurance assumed	51	52	48
Other revenues
Reinsurance assumed	3	4	3
Policyholder benefits and claims
Reinsurance assumed	122	94	123
Change in market risk benefits
Reinsurance assumed	22	105	92
Other expenses
Reinsurance assumed	11	21	25
Affiliated Entity | Assumed Reinsurance
Premiums
Reinsurance assumed	9	8	6
Universal life and investment-type product policy fees
Reinsurance assumed	(1)	(1)	(1)
Other revenues
Reinsurance assumed	1	1	1
Policyholder benefits and claims
Reinsurance assumed	16	14	39
Change in market risk benefits
Reinsurance assumed	(19)	(112)	(92)
Other expenses
Reinsurance assumed	$ (11)	$ (3)	$ 0