DAC, VOBA, AND DSI - PREDECESSOR COMPANY - Schedule of Deferred Policy Acquisition (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Balance, beginning of period	$ 567	$ 4,238	$ 4,456
Capitalization of commissions, sales and issue expenses	0	200	339
Amortization - Impact of assumption and experience unlocking and true-ups	(69)	4	170
Amortization - All other	(35)	(384)	(574)
Change due to unrealized investment gains and losses	6	347	(154)
Other	0	(3,838)	1
Balance, end of period	$ 469	$ 567	$ 4,238