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WORKERS' COMPENSATION INSURANCE AND RESERVES (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 29, 2012
Jul. 01, 2011
Jun. 29, 2012
Jul. 01, 2011
Dec. 30, 2011
Workers' Compensation Insurance and Reserves [Abstract]          
Workers' compensation claim deductible limit     $ 2.0    
Weighted average discount rate - claims below deductible limit     2.40%    
Weighted average period - claim payments below deductible limit     4 years 6 months    
Workers' compensation liability 192.7   192.7   191.8
Weighted average discount rate - claims and receivables above deductible limit     4.40%    
Weighted average period - claim payments and receivables above deductible limit     18 years 10 months 24 days    
Workers' compensation liability - claim payments and receivables above deductible limit 27.3   27.3   27.4
Workers compensation valuation allowance 7.2   7.2   7.3
Workers' compensation claim receivables net of valuation allowance 20.1   20.1   20.1
Workers' compensation expense $ 13.9 $ 12.4 $ 25.4 $ 22.6