Segment Reporting - Reconciliation of Segment Income to Net Income (Loss) (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	$ 531.1	$ 479.1	$ 974.4	$ 886.9
Impact of equity method investments	(0.9)	(4.5)	4.8	14.0
Other operating expenses (income), net	46.8	(11.3)	60.6	29.5
EBITDA	459.8	467.5	839.3	840.1
Depreciation and amortization	45.4	43.5	88.7	85.5
Income from operations	414.4	424.0	750.6	754.6
Interest expense, net	128.0	117.2	239.4	232.3
Loss on early extinguishment of debt	0.0	0.0	20.4	0.0
Income tax expense	42.9	59.2	80.7	106.4
Net income	243.5	247.6	410.1	415.9
Operating Segments \| Tim Hortons
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	281.1	279.0	537.3	506.8
Operating Segments \| Burger King
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	216.8	200.1	403.9	380.1
Operating Segments \| Popeyes
Segment Reporting, Revenue Reconciling Item [Line Items]
Segment income	33.2	0.0	33.2	0.0
Unallocated Management G&A
Segment Reporting, Revenue Reconciling Item [Line Items]
Share-based compensation and non-cash incentive compensation expense	11.9	11.3	30.4	19.2
Integration costs	0.0	3.8	0.0	6.0
Impact of equity method investments	4.1	7.8	1.2	(7.9)
Other operating expenses (income), net	46.8	(11.3)	60.6	29.5
Popeyes Acquisition
Segment Reporting, Revenue Reconciling Item [Line Items]
PLK Transaction costs	8.5	$ 0.0	$ 42.9	$ 0.0
Popeyes Acquisition \| Selling, General and Administrative Expenses
Segment Reporting, Revenue Reconciling Item [Line Items]
PLK Transaction costs	$ 34.4

Adjusted earnings before interest tax depreciation and amortization.

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Depreciation and amortization excluding depreciation and amortization included in other (income) expenses, net.

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