ACCRUED WORKERS' COMPENSATION COSTS - Schedule of Activities in Liability for Unpaid Claims and Claims Adjustment Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liability for Unpaid Claims and Claims Adjustment Expense
Total accrued costs, beginning of year	$ 189	$ 198	$ 205
Incurred
Current year	66	68	66
Prior years	(36)	(32)	(23)
Total incurred	30	36	43
Paid
Current year	(10)	(10)	(10)
Prior years	(34)	(35)	(40)
Total paid	(44)	(45)	(50)
Total accrued costs, end of year	$ 175	$ 189	$ 198