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Share-based compensation - Fair Value Inputs (Details)
12 Months Ended
Dec. 31, 2024
yr
$ / shares
Dec. 31, 2023
yr
$ / shares
Share-Based Payment Arrangements [Abstract]    
Weighted average stock price valuation (in canadian dollars per share) $ 61.80 $ 52.73
Weighted average exercise price (in canadian dollars per share) $ 61.80 $ 52.73
Risk-free interest rate 3.54% 3.14%
Expected life in years | yr 4.5 4.5
Expected dividend yield 0.00% 0.00%
Volatility 57.00% 64.00%
Weighted average fair value of options issued (in canadian dollars per share) $ 30.76 $ 28.44