Segment Reporting - (Income) Loss from Equity Method Investments (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
(Income) Loss from Equity Method Investments:
(Income) loss from equity method investments	$ 9.2	$ 12.7	$ 4.1
Burger King [Member] | BK - U.S. & Canada [Member]
(Income) Loss from Equity Method Investments:
(Income) loss from equity method investments	(0.4)	5.5	2.4
Burger King [Member] | BK - EMEA [Member]
(Income) Loss from Equity Method Investments:
(Income) loss from equity method investments		0.3	(0.3)
Burger King [Member] | BK - LAC [Member]
(Income) Loss from Equity Method Investments:
(Income) loss from equity method investments			0.2
Burger King [Member] | BK - APAC [Member]
(Income) Loss from Equity Method Investments:
(Income) loss from equity method investments	10.2	6.9	1.8
Tim Hortons [Member]
(Income) Loss from Equity Method Investments:
(Income) loss from equity method investments	$ (0.6)