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Subsequent Events - Additional Information (Details) - $ / shares
1 Months Ended 3 Months Ended
Apr. 06, 2021
Apr. 29, 2021
Mar. 31, 2021
Mar. 31, 2020
Subsequent Event [Line Items]        
Cash dividend declared by board (in usd per share)     $ 0.81 $ 0.77
Subsequent Event        
Subsequent Event [Line Items]        
Common stock dividends paid (in usd per share) $ 0.53      
Cash dividend declared by board (in usd per share)   $ 0.53    
Partnership exchangeable units | Restaurant Brands International Limited Partnership | Subsequent Event        
Subsequent Event [Line Items]        
Cash dividend paid per exchangeable unit (in usd per unit) $ 0.53 $ 0.53