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Franchise Arrangements - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Franchisor Disclosure [Line Items]    
Franchise arrangement period 20 years  
Net property and equipment $ 24,958,200,000 $ 24,160,000,000.0
Land 6,349,100,000 6,026,400,000
Accumulated depreciation and amortization of property and equipment 16,518,300,000 $ 14,890,900,000
Deferred collection amount of rental and royalty income 1  
Franchise Arrangements    
Franchisor Disclosure [Line Items]    
Net property and equipment 20,000,000,000.0  
Land 5,700,000,000  
Accumulated depreciation and amortization of property and equipment $ 12,100,000,000