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Commitments and Contingencies (Details)
$ in Millions
Sep. 25, 2021
USD ($)
ft²
Dec. 26, 2020
USD ($)
Sep. 26, 2020
USD ($)
Property, Plant and Equipment [Line Items]      
Contractual Obligation $ 93.8    
Letters of Credit Outstanding, Amount $ 46.5 $ 48.7 $ 50.4
Construction in Progress      
Property, Plant and Equipment [Line Items]      
Area Of Distribution Center | ft² 900,000