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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Other Commitments [Line Items]      
Royalty expense $ 173.0 $ 190.0 $ 206.1
Rent expense 166.6 171.6 188.7
Contingent rent expense 6.8 $ 8.2 $ 10.5
Purchase obligations $ 370.9    
Minimum      
Other Commitments [Line Items]      
Percentage of royalties 7.00%    
Maximum      
Other Commitments [Line Items]      
Percentage of royalties 15.00%