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Net Interest Expense and Other Net Finance Expense - Schedule of Interest Expense (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of attribution of expenses by nature to their function [line items]    
Interest on credit facilities $ 53.9 $ 58.6
Interest on lease liabilities 29.5 24.6
Interest on other long-term debt 14.3 6.2
Total interest expense 117.8 102.7
Total interest income (14.2) (11.7)
Net interest expense 103.6 91.0
Other net finance expense 0.8 2.0
Net interest expense and other net finance expense 104.4 93.0
Senior unsecured notes    
Disclosure of attribution of expenses by nature to their function [line items]    
Interest on senior unsecured notes $ 20.1 $ 13.3