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Related Party Transactions (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 27, 2023
USD ($)
restaurant
Jun. 28, 2022
USD ($)
restaurant
Jun. 27, 2023
USD ($)
restaurant
Jun. 28, 2022
USD ($)
restaurant
Franchise        
Related Party Transactions        
Number of restaurants 95 96 95 96
Four Franchise Restaurants and One Majority-Owned Company Restaurant [Member] | Franchise fees        
Related Party Transactions        
Fees received from franchise and license restaurants | $ $ 0.5 $ 0.5 $ 1.0 $ 0.9
Revenues | $ $ 0.5 $ 0.5 $ 1.0 $ 0.9
Officers, directors and shareholders | Majority-owned        
Related Party Transactions        
Number of restaurants 1 1 1 1
Officers, directors and shareholders | Franchise        
Related Party Transactions        
Number of restaurants 4 4 4 4