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ACCRUED WORKERS' COMPENSATION COSTS - Summary of Workers' Compensation Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Mar. 31, 2022
Dec. 31, 2021
Insurance [Abstract]        
Total accrued costs, end of period $ 187 $ 189 $ 199 $ 198
Collateral paid to carriers and offset against accrued costs (6) (7)    
Total accrued costs, net of carrier collateral offset 181 182    
Payable in less than 1 year (net of collateral paid to carriers) 54 54    
Payable in more than 1 year (net of collateral paid to carriers) 127 128    
Total accrued costs, net of carrier collateral offset 181 182    
Net of collateral paid to carriers, payable in less than one year (2) (2)    
Net of collateral paid to carriers, payable in more than 1 year $ (4) $ 5