ACCRUED WORKERS' COMPENSATION COSTS - Schedule of Workers' Compensation Loss Reserve Activity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Total accrued costs, beginning of period	$ 187	$ 199	$ 189	$ 198
Incurred
Current year	18	16	34	33
Prior years	(17)	(15)	(23)	(20)
Total incurred	1	1	11	13
Paid
Current year	(1)	(2)	(2)	(2)
Prior years	(9)	(9)	(20)	(20)
Total paid	(10)	(11)	(22)	(22)
Total accrued costs, end of period	$ 178	$ 189	$ 178	$ 189