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Subsequent Events - Additional Information (Details) - $ / shares
1 Months Ended 3 Months Ended
Apr. 03, 2019
Apr. 29, 2019
Mar. 31, 2019
Mar. 31, 2018
Subsequent Event [Line Items]        
Cash dividend declared by board (in usd per share)     $ 0.63 $ 0.55
Subsequent Event        
Subsequent Event [Line Items]        
Cash dividend paid per common share (in usd per share) $ 0.50      
Cash dividend declared by board (in usd per share)   $ 0.5    
Partnership Exchangeable Units | Restaurant Brands International Limited Partnership | Subsequent Event        
Subsequent Event [Line Items]        
Cash dividend paid per exchangeable unit (in usd per share) $ 0.5 $ 0.5