Segment Reporting - Loss from Equity Method Investments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
(Income) loss from equity method investments
(Income) loss from equity method investments	$ 4.1	$ 9.5	$ 12.7
Operating Segments [Member] | Tim Hortons [Member]
(Income) loss from equity method investments
(Income) loss from equity method investments	(7.9)	(0.3)
Operating Segments [Member] | Burger King [Member]
(Income) loss from equity method investments
(Income) loss from equity method investments	$ 12.0	$ 9.8	$ 12.7