Shareholders' Equity - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Aug. 31, 2023
Stockholders Equity [Line Items]
Number of shares authorized to be repurchased (in shares)			1,000,000,000
Remaining authorized repurchase amount	$ 500
Partnerships Exchangeable Units
Stockholders Equity [Line Items]
Exchange of partnership exchangeable units for RBI common shares (in shares)	2,220
Restaurant Brands International Limited Partnership
Stockholders Equity [Line Items]
Partnership exchangeable units economic interest	29.70%	29.90%
Partnership exchangeable units economic interest (in shares)	133,595,544	133,597,764