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Subsequent Events - Additional Information (Details) - $ / shares
12 Months Ended
Apr. 06, 2022
Feb. 15, 2022
Jan. 05, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Forecast            
Subsequent Event [Line Items]            
Cash dividend paid per common share (in dollars per share) $ 0.54          
Partnership exchangeable units            
Subsequent Event [Line Items]            
Cash dividend declared by board (in dollars per share)       $ 2.12 $ 2.08 $ 2.00
Subsequent event            
Subsequent Event [Line Items]            
Cash dividend paid per common share (in dollars per share)     $ 0.53      
Cash dividend declared by board (in dollars per share)   $ 0.54        
Subsequent event | Partnership exchangeable units | Restaurant Brands International Limited Partnership            
Subsequent Event [Line Items]            
Partnership exchangeable unit (in dollars per share)   $ 0.54 $ 0.53