INVESTMENTS - Schedule of Allowance for Credit Loss Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ (56)	$ (29)	$ (46)	$ (27)
Credit losses on securities where credit losses were not previously recorded	(2)	(5)	(14)	(8)
Increases in allowance on previously impaired securities	0	(1)	0	(1)
Decreases in allowance on previously impaired securities	0	0	0	0
Reduction in allowance due to disposals	1	8	4	9
Balance, end of period	(57)	(27)	(57)	(27)
Corporate Securities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	(55)	(20)	(45)	(19)
Credit losses on securities where credit losses were not previously recorded	(2)	(5)	(14)	(7)
Increases in allowance on previously impaired securities	0	(1)	0	(1)
Decreases in allowance on previously impaired securities	0	0	0	0
Reduction in allowance due to disposals	1	0	4	1
Balance, end of period	(55)	(26)	(55)	(26)
Asset Backed Securities
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	(8)	0	(8)
Credit losses on securities where credit losses were not previously recorded	0	0	0	0
Increases in allowance on previously impaired securities	0	0	0	0
Decreases in allowance on previously impaired securities	0	0	0	0
Reduction in allowance due to disposals	0	8	0	8
Balance, end of period	0	0	0	0
Foreign Corporate
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	(1)	(1)	(1)	0
Credit losses on securities where credit losses were not previously recorded	0	0	0	(1)
Increases in allowance on previously impaired securities	0	0	0	0
Decreases in allowance on previously impaired securities	0	0	0	0
Reduction in allowance due to disposals	0	0	0	0
Balance, end of period	$ (1)	$ (2)	$ (1)	$ (2)