v3.26.1
Shareholders' Equity - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Mar. 31, 2025
Jun. 30, 2026
Dec. 31, 2025
Aug. 06, 2025
Stockholders Equity [Line Items]            
Gain (loss) recorded on equity transactions       $ 0    
Number of shares authorized to be repurchased (in shares)           1,000,000,000
Stock repurchased, not yet settled (in shares)       13,782    
Remaining authorized repurchase amount $ 829,000,000     $ 829,000,000    
Issued Common Shares            
Stockholders Equity [Line Items]            
Exchange of Partnership exchangeable units for RBI common shares (in shares) 3,599,548 3,624 55,462      
Repurchase of common shares (in shares) 1,821,167     2,284,609    
Repurchase of common shares $ 137,000,000     $ 171,000,000    
Partnerships Exchangeable Units            
Stockholders Equity [Line Items]            
Exchange of Partnership exchangeable units for RBI common shares (in shares)       3,603,172    
Restaurant Brands International Limited Partnership            
Stockholders Equity [Line Items]            
Partnership exchangeable units economic interest (as a percent)       23.20% 24.00%  
Partnership exchangeable units economic interest (in shares) 105,753,373     105,753,373 109,356,545