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Summary of Significant Accounting Policies (Details)
$ in Millions
12 Months Ended
Dec. 26, 2023
USD ($)
restaurant
Dec. 27, 2022
USD ($)
restaurant
Dec. 28, 2021
Fiscal Year      
Length of fiscal year 364 days 364 days 364 days
Cash and Cash Equivalents      
Cash and cash equivalents included receivables from credit card entity | $ $ 27.8 $ 22.0  
Settlement period of credit card receivables, minimum 2 days    
Settlement period of credit card receivables, maximum 3 days    
Receivables      
Minimum number of days receivable are past due, warranting individual evaluation for collectability 120 days    
Franchise      
Principles of Consolidation      
Number of restaurants 106 100  
Franchise | Domestic      
Principles of Consolidation      
Number of restaurants   62  
Franchise | International      
Principles of Consolidation      
Number of restaurants 48 38  
Franchise | Domestic franchise restaurants      
Principles of Consolidation      
Number of restaurants 58    
Company-owned      
Principles of Consolidation      
Number of restaurants 635 597  
Minimum      
Fiscal Year      
Length of fiscal year 364 days    
Length of fiscal quarter 91 days    
Maximum      
Fiscal Year      
Length of fiscal year 371 days    
Length of fiscal quarter 98 days    
Unconsolidated | Franchise | Domestic franchise restaurants | Domestic      
Principles of Consolidation      
Number of restaurants 20 23  
Unconsolidated | Minimum | Franchise | Domestic franchise restaurants      
Principles of Consolidation      
Ownership percentage by entity 5.00% 5.00%  
Unconsolidated | Maximum | Franchise | Domestic franchise restaurants      
Principles of Consolidation      
Ownership percentage by entity 10.00% 10.00%  
Majority-owned | Company-owned      
Principles of Consolidation      
Number of restaurants 20 20