Leases - Summary of Property Revenue (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Lease Disclosure [Line Items]
Amortization of favorable and unfavorable income lease contracts, net	$ (10.1)	$ (3.5)	$ (0.9)
Total rental income	760.2	242.7	213.7
Franchise and Property Revenue [Member]
Lease Disclosure [Line Items]
Minimum	453.9	182.1	165.9
Contingent	281.7	38.1	25.0
Amortization of favorable and unfavorable income lease contracts, net	11.0	7.2	5.6
Total rental income	746.6	227.4	196.5
Earned income on direct financing leases	13.6	15.3	17.2
Total property revenues	$ 760.2	$ 242.7	$ 213.7