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ACCRUED WORKERS' COMPENSATION COSTS - Schedule of Workers' Compensation Loss Reserve Activity (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]        
Total accrued costs, beginning of period $ 154 $ 178 $ 175 $ 189
Incurred        
Current year 8 13 37 47
Prior years 6 (2) (23) (25)
Total incurred 14 11 14 22
Paid        
Current year (3) (4) (5) (6)
Prior years (10) (7) (29) (27)
Total paid (13) (11) (34) (33)
Total accrued costs, end of period $ 155 $ 178 $ 155 $ 178