DAC, VOBA, DSI, and DFEL (DFEL) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in DFEL [Abstract]
Balance as of beginning-of-year	$ 401	$ 650	$ 2,769
Business acquired (sold) through reinsurance	(290)
Deferrals	1,015	1,003	1,095
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(595)	(538)	(544)
Unlocking	(387)	(275)	(426)
Adjustment related to realized (gains) losses	(10)	25
Adjustment related to unrealized (gains) losses	281	(468)	(2,244)
Balance as of end-of-year	415	401	$ 650
Cumulative Effect, Period of Adoption, Adjustment [Member]
Changes in DFEL [Abstract]
Balance as of beginning-of-year	$ 4
Amortization, net of interest:
Balance as of end-of-year		$ 4