Closed Block (Revenues and Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues
Premiums	$ 874	$ 922	$ 1,104
Net investment income	1,362	1,362	1,382
Net investment gains (losses)	(28)	7	(51)
Net derivative gains (losses)	15	0	33
Total revenues	2,223	2,291	2,468
Expenses
Policyholder benefits and claims	1,621	1,706	1,890
Policyholder dividends	354	366	458
Other expenses	82	86	90
Total expenses	2,057	2,158	2,438
Revenues, net of expenses before provision for income tax expense (benefit)	166	133	30
Provision for income tax expense (benefit)	36	28	6
Revenues, net of expenses and provision for income tax expense (benefit)	$ 130	$ 105	$ 24