Closed Block (Revenues and Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues
Premiums	$ 207	$ 218
Net investment income	325	343
Net investment gains (losses)	(17)	(7)
Net derivative gains (losses)	(1)	5
Total revenues	514	559
Expenses
Policyholder benefits and claims	387	404
Policyholder dividends	88	90
Other expenses	18	20
Total expenses	493	514
Revenues, net of expenses before provision for income tax expense (benefit)	21	45
Provision for income tax expense (benefit)	4	10
Revenues, net of expenses and provision for income tax expense (benefit)	$ 17	$ 35