FAIR VALUE DISCLOSURES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Fair Value Inputs Assets Quantitative Information 1 [Line Items]
Actual market movement effect	$ 1,300		$ 1,100
AFS fixed maturities transferred from Level 3 to Level 2	258	$ 8
AFS fixed maturities transferred from Level 2 to Level 3	$ 0	$ 70
AFS fixed maturities transferred between Level 2 and 3 (as a percent)	21.00%	1.30%
Level 3 | Nonrecurring
Fair Value Inputs Assets Quantitative Information 1 [Line Items]
Fair value measurements not included in quantitative information about level 3 fair value measurements	$ 531		$ 736