ACCRUED WORKERS' COMPENSATION COSTS - Schedule of Workers' Compensation Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Insurance [Abstract]
Total accrued costs, end of year	$ 175	$ 189	$ 198	$ 205
Collateral paid to carriers and offset against accrued costs	(5)	(7)
Total accrued costs, net of carrier collateral offset	170	182
Payable in less than 1 year (net of collateral paid to carriers)	50	54
Payable in more than 1 year (net of collateral paid to carriers)	120	128
Collateral paid, current	1	2
Collateral paid, noncurrent	$ 4	$ 5