Deferred Acquisition Costs and Deferred Sales Inducement Costs (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Balances of and changes in DAC
Balance at the beginning of the period	$ 2,673	$ 2,742
Capitalization of acquisition costs	155	178
Amortization	(238)	(127)
Amortization, impact of valuation assumptions review	100	14
Impact of change in net unrealized (gains) losses on securities	(61)	(175)
Balance at the end of the period	2,429	2,604
Balances of and changes in DSIC
Balance at the beginning of the period	216	249
Deferred Sale Inducement Cost, Capitalization	1	1
Amortization	(19)	(14)
Amortization, impact of valuation assumptions review	16	0
Impact of change in net unrealized (gains) losses on securities	(1)	(21)
Balance at the end of the period	$ 181	$ 215