Franchise Arrangements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Franchisor Disclosure [Line Items]
Franchise arrangement period	20 years
Net property and equipment	$ 21,257.6	$ 23,117.6
Land	5,465.0	5,582.5
Accumulated depreciation and amortization of property and equipment	13,185.8	$ 14,574.8
Franchise Arrangements
Franchisor Disclosure [Line Items]
Net property and equipment	16,300.0
Land	4,500.0
Accumulated depreciation and amortization of property and equipment	$ 7,600.0