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Debt (Schedule of Debt) (Details) - USD ($)
$ in Millions
Dec. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]    
Total debt $ 441.2 $ 630.9
Less current portion 0.9 25.0
Long-term debt 440.3 605.9
Debt issuance costs 4.7 3.8
U.S. revolving line of credit    
Debt Instrument [Line Items]    
Total debt 440.3 441.0
U.S. term loan    
Debt Instrument [Line Items]    
Total debt 0.0 189.9
Notes Payable to Banks    
Debt Instrument [Line Items]    
Total debt $ 0.9 $ 0.0