Intangible Assets, Net and Goodwill - Schedule of Intangible Assets, Net and Goodwill (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Finite And Indefinite Lived Intangible Assets [Line Items]
Identifiable assets, Gross	$ 1,116.3	$ 1,089.5
Goodwill	4,815.7	4,574.4
Identifiable assets, accumulated amortization	(253.8)	(214.3)
Indefinite lived intangible assets, Net	8,678.7	8,272.6
Identifiable assets, Net	862.5	875.2
Intangible assets, net	9,541.2	9,147.8
Tim Hortons [Member] | Trade Names [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets, Net	6,568.0	6,175.4
Burger King [Member] | Trade Names [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets, Net	2,110.7	2,097.2
Franchise Agreements [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Identifiable assets, Gross	666.7	653.0
Identifiable assets, accumulated amortization	(121.4)	(106.8)
Identifiable assets, Net	545.3	546.2
Favorable Lease [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Identifiable assets, Gross	449.6	436.5
Identifiable assets, accumulated amortization	(132.4)	(107.5)
Identifiable assets, Net	$ 317.2	$ 329.0