CERTAIN NONTRADITIONAL LONG-DURATION CONTRACTS WITH GUARANTEES - PREDECESSOR COMPANY - Schedule of Deferred Sales Inducement (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Insurance [Abstract]
Beginning balance	$ 295	$ 715	$ 813
Capitalization	0	1	1
Amortization - Impact of assumption and experience unlocking and true-ups	(37)	15	103
Amortization - All other	(17)	(112)	(150)
Change in unrealized investment gains and losses	3	64	(52)
Other	0	(388)	0
Ending balance	$ 244	$ 295	$ 715