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Franchise Arrangements - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Franchisor Disclosure [Line Items]    
Franchise arrangement period 20 years  
Net property and equipment $ 23,117.6 $ 24,557.5
Land 5,582.5 5,788.4
Accumulated depreciation and amortization of property and equipment 14,574.8 $ 14,568.6
Franchise Arrangements    
Franchisor Disclosure [Line Items]    
Net property and equipment 14,900.0  
Land 4,400.0  
Accumulated depreciation and amortization of property and equipment $ 8,400.0