DAC, VOBA, DSI, and DFEL (DSI) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in DSI [Roll Forward]
Balance as of beginning-of-year	$ 213	$ 234	$ 248
Deferrals	5	7	26
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(26)	(20)	(29)
Unlocking		(1)	(3)
Adjustment related to realized (gains) losses	3	(1)	2
Adjustment related to unrealized (gains) losses	8	(6)	(10)
Balance as of end-of-year	$ 203	$ 213	$ 234