INVESTMENTS - Schedule of Fixed Maturities, Allowance for Credit Loss, Held-to-Maturity Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ (8)	$ (9)
Credit losses on securities where credit losses were not previously recorded	(1)	0
Increases in allowance on previously impaired securities	0	0
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	0	0
Balance, end of period	(9)	(9)
Corporate Securities
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	(2)	(2)
Credit losses on securities where credit losses were not previously recorded	0	0
Increases in allowance on previously impaired securities	0	0
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	0	0
Balance, end of period	(2)	(2)
Asset Backed Securities
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	(5)	(6)
Credit losses on securities where credit losses were not previously recorded	0	0
Increases in allowance on previously impaired securities	0	0
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	0	0
Balance, end of period	(5)	(6)
Foreign Corporate Securities
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	(1)	(1)
Credit losses on securities where credit losses were not previously recorded	(1)	0
Increases in allowance on previously impaired securities	0	0
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	0	0
Balance, end of period	$ (1)	$ (1)