Closed Block (Revenues and Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues
Premiums	$ 205	$ 216	$ 412	$ 434
Net investment income	330	342	655	685
Net investment gains (losses)	(42)	(13)	(59)	(20)
Net derivative gains (losses)	(7)	2	(8)	7
Total revenues	486	547	1,000	1,106
Expenses
Policyholder benefits and claims	379	415	766	819
Policyholder dividends	85	86	173	176
Other expenses	20	20	38	40
Total expenses	484	521	977	1,035
Revenues, net of expenses before provision for income tax expense (benefit)	2	26	23	71
Provision for income tax expense (benefit)	1	5	5	15
Revenues, net of expenses and provision for income tax expense (benefit)	$ 1	$ 21	$ 18	$ 56