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Financial Instruments and Risk Management (Fair Values of Derivative Instruments) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 30, 2017
Derivatives, Fair Value [Line Items]    
Fair value of assets and liabilities $ (15,861) $ (20,968)
Other current assets    
Derivatives, Fair Value [Line Items]    
Total derivative assets 2,171 1,600
Other current assets | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Total derivative assets 1,990 1,464
Other current assets | Non-hedges    
Derivatives, Fair Value [Line Items]    
Total derivative assets 181 136
Accrued liabilities    
Derivatives, Fair Value [Line Items]    
Total derivative liabilities 18,032 22,568
Accrued liabilities | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Total derivative liabilities 11,421 14,750
Accrued liabilities | Non-hedges    
Derivatives, Fair Value [Line Items]    
Total derivative liabilities $ 6,611 $ 7,818