INVESTMENTS - Investment Gains (Losses), Net (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net Investment Income [Line Items]
Investment gains (losses), net	$ (1)	$ (5)
Fixed maturities
Net Investment Income [Line Items]
Investment gains (losses), net	0	(5)
Mortgage loans on real estate
Net Investment Income [Line Items]
Investment gains (losses), net	$ (1)	$ 0