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ACCRUED WORKERS' COMPENSATION COSTS (Tables)
12 Months Ended
Dec. 31, 2020
Insurance [Abstract]  
Summary of Activities for Unpaid Claims, Claims Adjustment Expenses and Workers' Compensation Liabilities
The following table summarizes the accrued workers’ compensation cost activity for the years ended December 31, 2020, 2019 and 2018:
Year Ended December 31,
(in millions)202020192018
Total accrued costs, beginning of year$214 $238 $255 
Incurred
Current year64 72 80 
Prior years(20)(31)(28)
Total incurred44 41 52 
Paid
Current year(8)(14)(12)
Prior years(45)(51)(57)
Total paid(53)(65)(69)
Total accrued costs, end of year$205 $214 $238 
The following tables summarize workers' compensation liabilities on the consolidated balance sheets:
(in millions)December 31, 2020December 31, 2019
Total accrued costs, end of year$205 $214 
Collateral paid to carriers and offset against accrued costs(8)(9)
Total accrued costs, net of carrier collateral offset$197 $205 
Payable in less than 1 year
(net of collateral paid to carriers of $3 as of December 31, 2020 and 2019)
$59 61
Payable in more than 1 year
(net of collateral paid to carriers of $5 and $6 as of December 31, 2020 and 2019, respectively)
138 144 
Total accrued costs, net of carrier collateral offset$197 $205