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WORKERS' COMPENSATION INSURANCE AND RESERVES - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 23, 2016
Sep. 25, 2015
Sep. 23, 2016
Sep. 25, 2015
Dec. 25, 2015
Workers' Compensation Deductible Limit [Line Items]          
Workers' compensation claim deductible limit     $ 2.0    
Weighted average period - claim payments below deductible limit     5 years    
Payments made against self-insured claims     $ 55.6 $ 51.8  
Weighted average period - claim payments and receivables above deductible limit     16 years    
Excess claims $ 55.6   $ 55.6   $ 49.0
Workers' compensation claim receivables net of valuation allowance 51.6   51.6   $ 45.2
Workers' compensation expense $ 23.4 $ 24.7 $ 72.1 $ 69.1  
Below limit          
Workers' Compensation Deductible Limit [Line Items]          
Weighted average rate     1.70%   1.80%