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Summary of Significant Accounting Policies Concentration of Risk (Details)
12 Months Ended
Jan. 03, 2021
countries
distributors
number_of_restaurants
customers
states
Concentration Risk  
Number of Customers Accounting for More Than 10% of Revenues | customers 0
Number of Restaurants 6,828
U.S.  
Concentration Risk  
Number of Main In-line Distributors | distributors 1
Number of Additional In-line Distributors | distributors 4
Number of States Where Restaurants are Located | states 50
International  
Concentration Risk  
Number of Countries Entity Operates (Including Canada) | countries 30
Entity Operated Units  
Concentration Risk  
Number of Restaurants 361
Entity Operated Units | International  
Concentration Risk  
Number of Restaurants 0
Main In-line Distributor Risk | U.S.  
Concentration Risk  
Concentration Risk, Percentage 67.00%
Additional In-line Distributor Risk | U.S.  
Concentration Risk  
Concentration Risk, Percentage 32.00%
Geographic Concentration Risk | International  
Concentration Risk  
Concentration Risk, Percentage 10.00%