Segment Reporting - Reconciliation of Segment Income to Net Income (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Acquisition accounting impact on cost of sales				$ 0.8
Impact of equity method investments	$ 4.5	$ 6.4	$ (14.0)	4.7
Other operating expenses (income), net	(11.3)	35.2	29.5	72.8
EBITDA	467.5	348.0	840.1	620.9
Depreciation and amortization	43.5	45.9	85.5	94.7
Income from operations	424.0	302.1	754.6	526.2
Interest expense, net	117.2	123.2	232.3	246.3
(Gain) loss on early extinguishment of debt		39.9		39.6
Income tax expense	59.2	45.2	106.4	95.9
Net income	247.6	93.8	415.9	144.4
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	479.1	427.8	886.9	782.9
Operating Segments [Member] | Tim Hortons [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	279.0	234.9	506.8	419.3
Operating Segments [Member] | Burger King [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	200.1	192.9	380.1	363.6
Unallocated Management G&A [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Share-based compensation and non-cash incentive compensation expense	11.3	8.1	19.2	22.0
Acquisition accounting impact on cost of sales		(1.0)		0.8
Integration costs	3.8		6.0
Impact of equity method investments	7.8	10.1	(7.9)	11.0
Other operating expenses (income), net	$ (11.3)	35.2	$ 29.5	72.8
Unallocated Management G&A [Member] | Tim Hortons [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
TH transaction and restructuring costs		$ 27.4		$ 55.4