Supplemental Financial Information - Condensed Consolidating Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Sales	$ 490.5	$ 499.5
Franchise and property revenues	428.0	433.8
Total revenues	918.5	933.3
Cost of sales	388.2	433.2
Franchise and property expenses	104.2	129.1
Selling, general and administrative expenses	73.2	111.0
(Income) loss from equity method investments	(18.5)	(1.7)
Other operating expenses (income), net	40.8	37.6
Total operating costs and expenses	587.9	709.2
Income from operations	330.6	224.1
Interest expense, net	115.1	123.1
(Gain) loss on early extinguishment of debt		(0.3)
Income before income taxes	215.5	101.3
Income tax expense	47.2	50.7
Net income	168.3	50.6
Net income	168.3	50.6
Net income attributable to noncontrolling interests	0.9	1.0
Partnership preferred unit distributions	67.5	68.7
Net income (loss) attributable to common unitholders / shareholders	99.9	(19.1)
Total comprehensive income (loss)	534.3	(707.5)
Borrowers [Member]
Revenues:
Sales	490.5	499.5
Franchise and property revenues	428.0	433.8
Total revenues	918.5	933.3
Cost of sales	388.2	433.2
Franchise and property expenses	104.2	129.1
Selling, general and administrative expenses	73.2	111.0
(Income) loss from equity method investments	(18.5)	(1.7)
Other operating expenses (income), net	40.8	37.6
Total operating costs and expenses	587.9	709.2
Income from operations	330.6	224.1
Interest expense, net	115.1	123.1
(Gain) loss on early extinguishment of debt		(0.3)
Income before income taxes	215.5	101.3
Income tax expense	47.2	50.7
Net income	168.3	50.6
Net income	168.3	50.6
Net income attributable to noncontrolling interests	0.9	1.0
Net income (loss) attributable to common unitholders / shareholders	167.4	49.6
Total comprehensive income (loss)	534.3	(707.5)
Restaurant Brands International Limited Partnership [Member]
Revenues:
Equity in earnings of consolidated subsidiaries	168.3	50.6
Net income	168.3	50.6
Net income attributable to noncontrolling interests	0.9	1.0
Partnership preferred unit distributions	67.5	68.7
Net income (loss) attributable to common unitholders / shareholders	99.9	(19.1)
Total comprehensive income (loss)	534.3	(707.5)
Eliminations [Member]
Revenues:
Equity in earnings of consolidated subsidiaries	(168.3)	(50.6)
Net income	(168.3)	(50.6)
Net income attributable to noncontrolling interests	(0.9)	(1.0)
Net income (loss) attributable to common unitholders / shareholders	(167.4)	(49.6)
Total comprehensive income (loss)	$ (534.3)	$ 707.5