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Related-Party Disclosures - Schedule of Compensation of Key Management Personnel and Directors of the Company (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Related Party [Abstract]    
Salaries and other short-term employment benefits $ 18.0 $ 15.5
Directors’ fees 1.2 0.7
Share-based compensation 20.1 36.8
Total compensation $ 39.3 $ 53.0