INVESTMENTS - Schedule of Fixed Maturities, Allowance for Credit Loss, Available-for-Sale Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ (46)	$ (27)
Credit losses on securities where credit losses were not previously recorded	(23)	(12)
Increases in allowance on previously impaired securities	(1)	(21)
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	22	14
Balance, end of period	(48)	(46)
Corporate securities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	(45)	(19)
Credit losses on securities where credit losses were not previously recorded	(23)	(11)
Increases in allowance on previously impaired securities	(1)	(20)
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	21	6
Balance, end of period	(47)	(45)
Asset-backed securities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	0	(8)
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	8
Balance, end of period	0	0
Foreign Corporate Securities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	(1)	0
Credit losses on securities where credit losses were not previously recorded	0	(1)
Increases in allowance on previously impaired securities	0	0
Decreases in allowance on previously impaired securities	0	0
Reduction in allowance due to disposals	1	1
Balance, end of period	$ 0	$ (1)