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COMMITMENTS AND CONTINGENCIES - Obligations disclosures (Details) - Self-Insurance - USD ($)
$ in Millions
Dec. 29, 2019
Dec. 30, 2018
Loss Contingencies [Line Items]    
Estimated Insurance Recoveries $ 1.6 $ 1.9
Additional disclosures    
Undiscounted ultimate losses of all self-insurance reserves related to our workers' compensation liabilities, net of insurance recoveries $ 11.7 $ 12.3
Discount rate of ultimate losses (as a percent) 1.60% 3.10%
Present value of self-insurance reserves $ 10.6 $ 10.7