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Summary of Significant Accounting Policies Restaurant Information by Ownership Type (Detail)
Dec. 31, 2024
Restaurant
Dec. 31, 2023
Restaurant
Dec. 31, 2022
Restaurant
Segment Reporting Information [Line Items]      
Number of Restaurants 43,477 41,822 40,275
Franchised restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 41,432 39,680 38,169
Company-operated restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 2,045 2,142 2,106
Conventional franchised | Franchised restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 22,077 21,818 21,720
Developmental licensed | Franchised restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 9,247 8,684 8,229
Affiliated | Franchised restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 10,108 9,178 8,220