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WORKERS' COMPENSATION INSURANCE AND RESERVES - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 26, 2015
Jun. 27, 2014
Jun. 26, 2015
Jun. 27, 2014
Dec. 26, 2014
Workers' Compensation Deductible Limit [Line Items]          
Workers' compensation claim deductible limit     $ 2.0    
Weighted average period - claim payments below deductible limit     4 years 6 months    
Payments made against self-insured claims     $ 34.4 $ 29.8  
Weighted average period - claim payments and receivables above deductible limit     14 years 8 months 12 days    
Excess claims $ 44.5   $ 44.5   $ 42.6
Workers' compensation claim receivables net of valuation allowance 40.6   40.6   $ 38.7
Workers' compensation expense $ 22.9 $ 17.5 $ 44.4 $ 33.5  
Below limit          
Workers' Compensation Deductible Limit [Line Items]          
Weighted average rate     1.60%   1.70%