Consolidated Statements of Equity - USD ($) $ in Millions	Total	Issued Common Shares [Member]	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Class A Common Units [Member]	Partnerships Exchangeable Units [Member]
Beginning Balance at Dec. 31, 2013	$ 1,516.2	$ 3.5	$ 1,239.9	$ 225.5	$ 54.6	$ (7.3)
Beginning Balance, shares at Dec. 31, 2013		352,200,000
Stock option exercises	0.4		0.4
Stock option exercises, shares		100,000
Share-based compensation	25.8		25.8
Issuance of common stock, value	3.3		3.3
Issuance of common stock, shares		100,000
Dividends paid on common shares	(105.6)			(105.6)
Retirement of treasury stock			(7.3)			$ 7.3
Retirement of treasury stock, Shares		(300,000)
Transfer of additional paid-in capital balance to common shares		$ 1,262.1	$ (1,262.1)
BKW reorganization into Partnership		$ (1,265.6)		(50.3)				$ 569.8	$ 746.1
BKW reorganization into Partnership, Shares		(352,100,000)						87,000,000	265,000,000
Issuance of Class A Common units to RBI for acquisition of Tim Hortons	3,783.1							$ 3,783.1
Issuance of Class A Common units to RBI for acquisition of Tim Hortons, shares								106,600,000
Issuance of Class A Common units to RBI for issuance and exercise of Warrant	247.6							$ 247.6
Issuance of Class A Common units to RBI for issuance and exercise of Warrant, shares								8,400,000
Allocation of Partnership equity interests								$ (2,285.5)	$ 2,285.5
Accretion of Partnership preferred units	(546.4)							(236.6)	(309.8)
Preferred unit distributions	(13.8)							(6.0)	(7.8)
Capital contribution from RBI Inc.	0.1							0.1
Noncontrolling interest from acquisition of Tim Hortons	1.1						$ 1.1
Net income (loss)	(268.9)			(69.6)			0.2	(86.4)	(113.1)
Other comprehensive income (loss)	(303.1)				(303.1)
Preferred unit distributions	(13.8)							(6.0)	(7.8)
Capital contribution from RBI Inc.	0.1							0.1
Net income (loss)	(268.9)			$ (69.6)			0.2	(86.4)	(113.1)
Other comprehensive income (loss)	(303.1)				(303.1)
Ending Balance at Dec. 31, 2014	4,339.8				(248.5)		1.3	$ 1,986.1	$ 2,600.9
Ending Balance, shares at Dec. 31, 2014								202.0
Ending Balance, shares at Dec. 31, 2014									265.0
Distributions declared on Class A common units	(89.1)							$ (89.1)
Distributions declared on partnership exchangeable units	(116.6)								$ (116.6)
Preferred unit distributions	(271.2)							(118.2)	(153.0)
Capital contribution from RBI Inc.	55.5							55.5
Net income (loss)	511.7						3.4	222.1	286.2
Other comprehensive income (loss)	(1,219.3)				(1,219.3)
Preferred unit distributions	(271.2)							(118.2)	(153.0)
Repurchase of Partnership exchangeable units	$ (293.7)								$ (293.7)
Repurchase of Partnership exchangeable units, shares									(8,150,003)
Exchange of Partnership exchangeable units for RBI common shares								820.3	$ (820.3)
Exchange of Partnership exchange units for RBI common shares, shares	(31,302,135)								(23,152,132)
Capital contribution from RBI Inc.	$ 55.5							55.5
Restaurant VIE distributions	(4.0)						(4.0)
Net income (loss)	511.7						3.4	222.1	$ 286.2
Other comprehensive income (loss)	(1,219.3)				(1,219.3)
Ending Balance at Dec. 31, 2015	2,913.1				(1,467.8)		0.7	$ 2,876.7	$ 1,503.5
Ending Balance, shares at Dec. 31, 2015								202,006,067
Ending Balance, shares at Dec. 31, 2015									233,739,648
Distributions declared on Class A common units	(144.8)							$ (144.8)
Distributions declared on partnership exchangeable units	$ (140.9)								$ (140.9)
Stock option exercises, shares	1,598,000
Preferred unit distributions	$ (270.0)							(136.5)	(133.5)
Capital contribution from RBI Inc.	63.4							63.4
Net income (loss)	955.9						3.5	482.1	470.3
Other comprehensive income (loss)	112.4				112.4
Preferred unit distributions	(270.0)							(136.5)	(133.5)
Exchange of Partnership exchangeable units for RBI common shares								223.2	$ (223.2)
Exchange of Partnership exchange units for RBI common shares, shares									(6,744,244)
Capital contribution from RBI Inc.	63.4							63.4
Restaurant VIE distributions	(0.1)						(0.1)
Net income (loss)	955.9						3.5	482.1	$ 470.3
Other comprehensive income (loss)	112.4				112.4
Ending Balance at Dec. 31, 2016	$ 3,489.0				$ (1,355.4)		$ 4.1	$ 3,364.1	$ 1,476.2
Ending Balance, shares at Dec. 31, 2016								202,006,067
Ending Balance, shares at Dec. 31, 2016									226,995,404