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ACCRUED WORKERS' COMPENSATION COSTS - Schedule of Workers' Compensation Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Insurance [Abstract]        
Total accrued costs, end of period $ 175 $ 175 $ 187 $ 189
Collateral paid to carriers and offset against accrued costs (4) (5)    
Total accrued costs, net of carrier collateral offset 171 170    
Payable in less than 1 year
(net of collateral paid to carriers of $1 and $1 at March 31, 2024 and December 31, 2023, respectively) 51 50    
Payable in more than 1 year 
(net of collateral paid to carriers of $3 and $4 at March 31, 2024 and December 31, 2023, respectively) 120 120    
Total accrued costs, net of carrier collateral offset 171 170    
Net of collateral paid to carriers, payable in less than one year 1 1    
Net of collateral paid to carriers, payable in more than 1 year $ 3 $ 4