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Derivative Instruments and Hedging Activities (Company's Derivative Positions and Their Impact on Financial Position) (Details) - Significant Other Observable Inputs (Level 2) - Designated as Hedging Instrument [Member] - Foreign exchange contracts - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 30, 2017
Non-trade amounts receivable    
Derivatives, Fair Value [Line Items]    
Asset derivatives $ 31.6 $ 32.2
Accrued liabilities    
Derivatives, Fair Value [Line Items]    
Liability derivatives $ 38.1 $ 29.6