Closed Block (Revenues and Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Premiums	$ 310	$ 359	$ 955	$ 1,097
Net investment income	390	420	1,165	1,198
Net investment gains (losses)	(7)	1	(12)	(8)
Net derivative gains (losses)	12	(16)	19	7
Total revenues	705	764	2,127	2,294
Expenses
Policyholder benefits and claims	522	575	1,588	1,714
Policyholder dividends	127	136	478	572
Other expenses	24	27	73	79
Total expenses	673	738	2,139	2,365
Revenues, net of expenses before provision for income tax expense (benefit)	32	26	(12)	(71)
Provision for income tax expense (benefit)	6	5	(3)	(15)
Revenues, net of expenses and provision for income tax expense (benefit)	$ 26	$ 21	$ (9)	$ (56)