Equity Method Investments - Summary of Franchise and Property Revenue (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues from affiliates:
Franchise royalties	$ 249.8	$ 239.2	$ 477.6	$ 455.0
Property revenues	198.0	197.5	369.3	376.0
Franchise fees and other revenue	33.8	37.7	62.7	77.2
Total	481.6	474.4	909.6	908.2
Affiliates [Member]
Revenues from affiliates:
Franchise royalties	31.6	23.9	59.3	44.3
Property revenues	7.6	7.2	14.2	14.2
Franchise fees and other revenue	4.3	2.2	7.9	3.4
Total	$ 43.5	$ 33.3	$ 81.4	$ 61.9