Other Operating Expenses (Income), net - Other Operating Expenses (Income), Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income and Expenses [Abstract]
Net losses on disposal of assets, restaurant closures and refranchisings	$ 17.7	$ 22.0	$ 25.4
Litigation settlements and reserves, net	1.6	1.3	4.0
Net losses on derivatives		37.3	290.9
Net losses (gains) on foreign exchange	(20.1)	46.7	(3.8)
Other, net	0.1	(1.8)	10.9
Other operating expenses (income), net	$ (0.7)	$ 105.5	$ 327.4