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Goodwill - Schedule of Goodwill Allocated (Details) - CAD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure of information for cash-generating units [line items]    
Goodwill $ 2,346.4 $ 2,184.3
Cash-generating units    
Disclosure of information for cash-generating units [line items]    
Goodwill 2,346.4 2,184.3
Cash-generating units | Canada    
Disclosure of information for cash-generating units [line items]    
Goodwill 359.5 359.5
Cash-generating units | United States    
Disclosure of information for cash-generating units [line items]    
Goodwill 1,408.0 1,304.9
Cash-generating units | Global    
Disclosure of information for cash-generating units [line items]    
Goodwill $ 578.9 $ 519.9