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EMPLOYEE BENEFIT PLANS - Schedule of Other Changes in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Pension expense    
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Before Tax [Roll Forward]    
Other comprehensive income (loss), beginning balance $ 56 $ 68
Net gain (loss) arising during period 19 7
Actuarial loss (gain) 4 4
Curtailment loss recognized 0 0
Other comprehensive income (loss), ending balance 33 56
Post-Retirement Plan    
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Before Tax [Roll Forward]    
Other comprehensive income (loss), beginning balance (14) (4)
Net gain (loss) arising during period 1 10
Prior Service credit (cost) arising during period 0 0
Actuarial loss (gain) (2) 0
Prior service cost 0 0
Other comprehensive income (loss), ending balance $ (12) $ (14)