Long-Term Debt - Schedule of Interest Expense, Net (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Debt Instrument [Line Items]
Amortization of deferred financing costs and debt issuance discount	$ 9.7	$ 2.6	$ 25.0	$ 7.8
Capital lease obligations	5.3	1.3	15.7	4.0
Other	0.7	0.3	2.3	0.9
Interest income	(0.9)	(0.8)	(3.3)	(2.8)
Interest expense, net	116.0	51.3	362.3	151.9
Interest Rate Caps [Member]
Debt Instrument [Line Items]
Interest expense		2.5		7.0
2014 Term Loan Facility [Member]
Debt Instrument [Line Items]
Interest expense	52.6		197.8
2015 Senior Notes [Member]
Debt Instrument [Line Items]
Interest expense	14.4		20.7
2014 Senior Notes [Member]
Debt Instrument [Line Items]
Interest expense	33.8		101.3
Tim Hortons Notes [Member]
Debt Instrument [Line Items]
Interest expense	$ 0.4		$ 2.8
2012 Term Loan Facility [Member]
Debt Instrument [Line Items]
Interest expense		12.8		38.3
2010 Senior Notes [Member]
Debt Instrument [Line Items]
Interest expense		19.6		58.8
2011 Discount Notes [Member]
Debt Instrument [Line Items]
Interest expense		$ 13.0		$ 37.9