Description of Business and Organization - Additional Information (Details)	Mar. 31, 2019 Restaurant Country
Basis Of Presentation [Line Items]
Number of restaurants in operation	25,809
Number of countries in which company and franchise restaurants operated (more than) | Country	100
Percentage of franchised Tim Hortons, Burger King, and Popeyes restaurants	100.00%
Tim Hortons
Basis Of Presentation [Line Items]
Number of restaurants in operation	4,866
Burger King
Basis Of Presentation [Line Items]
Number of restaurants in operation	17,823
Popeyes
Basis Of Presentation [Line Items]
Number of restaurants in operation	3,120