Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Balances of and changes in DAC
Balance at the beginning of the period	$ 2,673	$ 2,742
Capitalization of acquisition costs	102	116
Amortization	(255)	(45)
Impact of change in net unrealized (gains) losses on securities	(43)	(123)
Balance at the end of the period	2,477	2,690
Balances of and changes in DSIC
Balance at the beginning of the period	216	249
Deferred Sale Inducement Cost, Capitalization	1	1
Amortization	(18)	(6)
Impact of change in net unrealized (gains) losses on securities	(5)	(19)
Balance at the end of the period	$ 194	$ 225