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INVESTMENTS - Schedule of Roll Forward of Allowance for Credit Losses of Fixed Maturities, Available for Sale (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]    
Beginning Balance $ (54) $ (30)
Credit losses on securities where credit losses were not previously recorded (24) (26)
Increases in allowance on previously impaired securities (1) (21)
Decreases in allowance on previously impaired securities 0
Reduction in allowance due to disposals 30 23
Balance, end of period (48) (54)
Corporate Securities    
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]    
Beginning Balance (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
Reduction in allowance due to disposals 22 6
Balance, end of period (47) (45)
Asset-Backed Securities    
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]    
Beginning Balance 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
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]    
Beginning Balance (10) (3)
Credit losses on securities where credit losses were not previously recorded 0 (16)
Increases in allowance on previously impaired securities 0 (1)
Decreases in allowance on previously impaired securities 0
Reduction in allowance due to disposals 8 10
Balance, end of period $ (1) $ (10)