Intangible Assets, Net and Goodwill - Schedule of Intangible Assets, Net and Goodwill (Detail) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Finite And Indefinite Lived Intangible Assets [Line Items]
Identifiable assets, Gross	$ 1,168.7	$ 1,091.1
Identifiable assets, accumulated amortization	(322.6)	(282.1)
Identifiable assets, Net	846.1	809.0
Indefinite lived intangible assets:	9,995.5	8,419.0
Intangible assets, net	10,841.6	9,228.0
Goodwill	5,683.7	4,675.1
Tim Hortons
Finite And Indefinite Lived Intangible Assets [Line Items]
Goodwill	4,214.4	4,087.8
Tim Hortons | Trade names
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets:	6,547.7	6,341.6
Burger King
Finite And Indefinite Lived Intangible Assets [Line Items]
Goodwill	601.5	587.3
Burger King | Trade names
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets:	2,128.8	2,077.4
Popeyes
Finite And Indefinite Lived Intangible Assets [Line Items]
Goodwill	867.8	0.0
Popeyes | Trade names
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite lived intangible assets:	1,319.0	0.0
Franchise Agreements
Finite And Indefinite Lived Intangible Assets [Line Items]
Identifiable assets, Gross	716.3	655.1
Identifiable assets, accumulated amortization	(150.6)	(132.4)
Identifiable assets, Net	565.7	522.7
Off-Market Favorable Lease
Finite And Indefinite Lived Intangible Assets [Line Items]
Identifiable assets, Gross	452.4	436.0
Identifiable assets, accumulated amortization	(172.0)	(149.7)
Identifiable assets, Net	$ 280.4	$ 286.3