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ACCRUED WORKERS' COMPENSATION COSTS - Schedule of Workers' Compensation Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Insurance [Abstract]            
Total accrued costs, end of period $ 178 $ 178 $ 189 $ 192 $ 189 $ 198
Collateral paid to carriers and offset against accrued costs (5)   (7)      
Total accrued costs, net of carrier collateral offset 173   182      
Payable in less than 1 year
(net of collateral paid to carriers of $1 and $2 at September 30, 2023 and December 31, 2022, respectively) 51   54      
Payable in more than 1 year 
(net of collateral paid to carriers of $4 and $5 at September 30, 2023 and December 31, 2022, respectively) 122   128      
Total accrued costs, net of carrier collateral offset 173   182      
Net of collateral paid to carriers, payable in less than one year 1   2      
Net of collateral paid to carriers, payable in more than 1 year $ 4   $ 5