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Debt (Schedule Of Debt) (Detail) - USD ($)
$ in Millions
Sep. 29, 2017
Dec. 30, 2016
Debt Instrument [Line Items]    
Total debt $ 695.8 $ 619.9
Less: Short-term debt 135.4 130.3
Long-term debt 560.4 489.6
Uncommitted Facilities [Member]    
Debt Instrument [Line Items]    
Total debt 135.0 130.0
Senior Notes [Member]    
Debt Instrument [Line Items]    
Principal amount 400.0 400.0
Unamortized discount on Notes (2.3) (2.5)
Debt issuance costs (2.2) (2.4)
Note Payable Fair Value 427.1 410.6
Promissory Notes And Other Debt [Member]    
Debt Instrument [Line Items]    
Principal amount 0.9 0.5
Total debt 1.3 0.8
Note Payable Fair Value 1.3 0.8
2014 Credit Facility [Member] | Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Total debt $ 164.0 $ 94.0