ACCRUED WORKERS' COMPENSATION COSTS - Summary of Workers' Compensation Loss Reserve Activity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Total accrued costs, beginning of period	$ 189	$ 198
Incurred
Current year	16	17
Prior years	(6)	(5)
Total incurred	10	12
Paid
Current year	(1)	0
Prior years	(11)	(11)
Total paid	(12)	(11)
Total accrued costs, end of period	$ 187	$ 199