Closed Block (Revenues and Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Premiums	$ 1,298	$ 1,498	$ 1,580
Net investment income	1,541	1,596	1,740
Net investment gains (losses)	(36)	(25)	(7)
Net derivative gains (losses)	18	(17)	12
Total revenues	2,821	3,052	3,325
Expenses
Policyholder benefits and claims	2,150	2,330	2,291
Policyholder dividends	621	791	924
Other expenses	96	104	111
Total expenses	2,867	3,225	3,326
Revenues, net of expenses before provision for income tax expense (benefit)	(46)	(173)	(1)
Provision for income tax expense (benefit)	(10)	(36)	(2)
Revenues, net of expenses and provision for income tax expense (benefit)	$ (36)	$ (137)	$ 1