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Commitments and Contingencies (Narratives) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Other Commitments [Line Items]      
Royalty expense $ 190.0 $ 206.1 $ 243.5
Rent expense 171.6 188.7 186.1
Contingent rent expense 8.2 $ 10.5 $ 13.3
Purchase obligations $ 357.3    
Minimum      
Other Commitments [Line Items]      
Percentage of royalties 5.00%    
Maximum      
Other Commitments [Line Items]      
Percentage of royalties 15.00%