Cover - shares	6 Months Ended
	Jun. 30, 2023	Aug. 01, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2023
Document Transition Report	false
Entity File Number	001-36786
Entity Registrant Name	RESTAURANT BRANDS INTERNATIONAL INC.
Entity Incorporation, State or Country Code	Z4
Entity Tax Identification Number	98-1202754
Entity Address, Address Line One	130 King Street West, Suite 300
Entity Address, Postal Zip Code	M5X 1E1
Entity Address, City or Town	Toronto,
Entity Address, State or Province	ON
City Area Code	905
Local Phone Number	339-6011
Title of 12(b) Security	Common Shares, without par value
Trading Symbol	QSR
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		312,283,429
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001618756
Current Fiscal Year End Date	--12-31