CERTAIN NONTRADITIONAL LONG-DURATION CONTRACTS WITH GUARANTEES - PREDECESSOR COMPANY - Schedule of Liabilities for Guarantee Benefits (Details) - New York Variable Annuities - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Additional Liability, Long-Duration Insurance [Roll Forward]
Beginning balance	$ 4,281	$ 18,128	$ 12,527
Incurred guarantee benefits	(649)	(4,933)	5,637
Paid guarantee benefits	(8)	(43)	(73)
Change in unrealized investment gains and losses	(1)	(38)	37
Other		(8,833)
Ending balance	3,623	4,281	18,128
GMDB
Additional Liability, Long-Duration Insurance [Roll Forward]
Beginning balance	216	789	682
Incurred guarantee benefits	18	(5)	139
Paid guarantee benefits	(8)	(43)	(69)
Change in unrealized investment gains and losses	(1)	(38)	37
Other		(487)
Ending balance	225	216	789
GMAB/GMWB/ GMIWB
Additional Liability, Long-Duration Insurance [Roll Forward]
Beginning balance	4,060	17,314	11,823
Incurred guarantee benefits	(667)	(4,924)	5,491
Paid guarantee benefits	0	0	0
Change in unrealized investment gains and losses	0	0	0
Other		(8,330)
Ending balance	3,393	4,060	17,314
GMIB
Additional Liability, Long-Duration Insurance [Roll Forward]
Beginning balance	5	25	22
Incurred guarantee benefits	0	(4)	7
Paid guarantee benefits	0	0	(4)
Change in unrealized investment gains and losses	0	0	0
Other		(16)
Ending balance	$ 5	$ 5	$ 25