INVESTMENTS - Schedule of Held-to-Maturity, Allowance for Credit Loss Rollforward (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ (9)	$ (9)
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	(8)	(8)
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	(6)	(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	(6)	(6)
Foreign Corporate
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	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	$ (1)	$ (1)