DAC, VOBA, AND DSI - PREDECESSOR COMPANY - Schedule of Changes in VOBA (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement in Deferred Sales Inducements [Roll Forward]
Balance, beginning of period	$ 25	$ 28	$ 27
Amortization - Impact of assumption and experience unlocking and true-ups	(2)	4
Amortization - All other	(2)	(6)
Interest	0	2
Change due to unrealized investment gains and losses	1	1
Balance, end of period	$ 25	$ 28