Closed Block (Revenues and Expenses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Premiums	$ 218	$ 235
Net investment income	343	338
Net investment gains (losses)	(7)	4
Net derivative gains (losses)	5	(2)
Total revenues	559	575
Expenses
Policyholder benefits and claims	404	413
Policyholder dividends	90	97
Other expenses	20	22
Total expenses	514	532
Revenues, net of expenses before provision for income tax expense (benefit)	45	43
Provision for income tax expense (benefit)	10	9
Revenues, net of expenses and provision for income tax expense (benefit)	$ 35	$ 34