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MARKET RISKS AND CONCENTRATIONS (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Concentration Risk [Line Items]    
Aggregate carrying amount of net assets 454.5us-gaap_AssetsNet $ 359.0us-gaap_AssetsNet
Trade accounts and other receivables [Member]    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 10.80%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember		  
Net sales [Member]    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 8.20%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember		  
Workforce subject to collective bargaining agreements [Member]    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 38.10%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember