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ACCRUED WORKERS' COMPENSATION COSTS - Schedule of Workers' Compensation Loss Reserve Activity (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] |  |  |  |
Total accrued costs, beginning of period | $ 175 | $ 187 | $ 175 | $ 189
Incurred |  |  |  |
Current year | 14 | 18 | 30 | 34
Prior years | (26) | (17) | (30) | (23)
Total incurred | (12) | 1 | 0 | 11
Paid |  |  |  |
Current year | (1) | (1) | (2) | (2)
Prior years | (8) | (9) | (19) | (20)
Total paid | (9) | (10) | (21) | (22)
Total accrued costs, end of period | $ 154 | $ 178 | $ 154 | $ 178

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