Equity Method Investments - Summary of Franchise and Property Revenues (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues from affiliates:
Franchise royalties	$ 308.7	$ 249.8	$ 550.7	$ 477.6
Property revenues	189.3	198.0	364.3	369.3
Franchise fees and other revenue	32.6	33.8	65.8	62.7
Total	530.6	481.6	980.8	909.6
Affiliates
Revenues from affiliates:
Franchise royalties	43.4	31.6	81.9	59.3
Property revenues	6.6	7.6	12.9	14.2
Franchise fees and other revenue	5.3	4.3	11.0	7.9
Total	$ 55.3	$ 43.5	$ 105.8	$ 81.4