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Other CARES Act Provisions (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 29, 2021
Dec. 30, 2020
Unusual or Infrequent Item, or Both [Line Items]    
Employee retention tax credit, $ 0.8 $ 2.6
Social security taxes 3.1  
Costs of company restaurant sales    
Unusual or Infrequent Item, or Both [Line Items]    
Employee retention tax credit, 0.3 0.9
General and administrative expenses    
Unusual or Infrequent Item, or Both [Line Items]    
Employee retention tax credit, $ 0.5 $ 1.7