Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 19, 2018
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	QSP
Entity Registrant Name	Restaurant Brands International Limited Partnership
Entity Central Index Key	0001618755
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Partnership Exchangeable Units
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		217,543,591
Class A common units
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		202,006,067