Segment Reporting - Revenues by Operating Segment and Country (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue, Major Customer [Line Items]
Total revenues	$ 1,132.7	$ 1,040.2	$ 2,133.3	$ 1,958.7
Canada
Revenue, Major Customer [Line Items]
Total revenues	687.9	683.0	1,344.9	1,264.2
United States
Revenue, Major Customer [Line Items]
Total revenues	313.2	246.3	545.6	475.8
Other
Revenue, Major Customer [Line Items]
Total revenues	131.6	110.9	242.8	218.7
Tim Hortons
Revenue, Major Customer [Line Items]
Total revenues	772.3	759.8	1,505.9	1,417.6
Burger King
Revenue, Major Customer [Line Items]
Total revenues	293.7	280.4	560.7	541.1
Popeyes
Revenue, Major Customer [Line Items]
Total revenues	$ 66.7	$ 0.0	$ 66.7	$ 0.0