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Summary of Significant Accounting Policies Restaurant Information by Ownership Type (Detail)
Dec. 31, 2022
Restaurant
Dec. 31, 2021
Restaurant
Dec. 31, 2020
Restaurant
Segment Reporting Information [Line Items]      
Number of Restaurants 40,275 40,031 39,198
Franchised restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 38,169 37,295 36,521
Company-operated restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 2,106 2,736 2,677
Conventional franchised | Franchised restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 21,720 21,607 21,712
Developmental licensed | Franchised restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 8,229 7,913 7,663
Affiliated | Franchised restaurants:      
Segment Reporting Information [Line Items]      
Number of Restaurants 8,220 7,775 7,146