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Commitments and Contingencies (Details) - USD ($)
$ in Millions
Jun. 29, 2019
Dec. 29, 2018
Jun. 30, 2018
Commitments and Contingencies Disclosure [Abstract]      
Purchase Obligation, Due Second Year $ 0.0    
Letters of Credit Outstanding, Amount $ 37.3 $ 33.5 $ 39.9