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NATURE OF OPERATIONS (Details) - Restaurant
Jun. 26, 2024
Dec. 27, 2023
Class of Stock [Line Items]    
Number of restaurants 547  
Company-operated    
Class of Stock [Line Items]    
Number of restaurants 311  
Licensed    
Class of Stock [Line Items]    
Number of restaurants 236  
Shake Shack Inc.    
Class of Stock [Line Items]    
Ownership percent of noncontrolling interest 94.10% 93.30%