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Summary of Significant Accounting Policies Other Intangible Assets and Deferred Financing Costs (Details)
 12 Months Ended
Dec. 30, 2018
Computer software | Minimum  
Finite-Lived Intangible Assets  
Finite-Lived Intangible Asset, Useful Life 1 year
Computer software | Maximum  
Finite-Lived Intangible Assets  
Finite-Lived Intangible Asset, Useful Life 5 years
Reacquired rights under franchise agreements | Minimum  
Finite-Lived Intangible Assets  
Finite-Lived Intangible Asset, Useful Life 4 years
Reacquired rights under franchise agreements | Maximum  
Finite-Lived Intangible Assets  
Finite-Lived Intangible Asset, Useful Life 20 years
Franchise agreements  
Finite-Lived Intangible Assets  
Finite-Lived Intangible Asset, Useful Life 20 years