FAIR VALUE DISCLOSURES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Fair Value Inputs Assets Quantitative Information 1 [Line Items]
Fair value adjustments on GMIB asset	$ 126		$ 107
Fair value adjustments on amounts due from reinsurers	215		210
AFS fixed maturities transferred from Level 3 to Level 2	110	$ 549
AFS fixed maturities transferred from Level 2 to Level 3	$ 258	$ 2
Fair value measurement with unobservable inputs reconciliation recurring basis asset transfers percentage	3.90%	4.50%
Nonrecurring | Level 3
Fair Value Inputs Assets Quantitative Information 1 [Line Items]
Investments, fair value disclosure	$ 1,400		$ 635