Closed Block (Revenues and Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues
Premiums	$ 371	$ 390	$ 738	$ 757
Net investment income	371	447	778	875
Net investment gains (losses)	10	(4)	(9)	(5)
Net derivative gains (losses)	(3)	9	23	12
Total revenues	749	842	1,530	1,639
Expenses
Policyholder benefits and claims	589	563	1,139	1,102
Policyholder dividends	217	231	436	459
Other expenses	25	28	52	57
Total expenses	831	822	1,627	1,618
Revenues, net of expenses before provision for income tax expense (benefit)	(82)	20	(97)	21
Provision for income tax expense (benefit)	(17)	4	(20)	4
Revenues, net of expenses and provision for income tax expense (benefit)	$ (65)	$ 16	$ (77)	$ 17