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Share Capital and Employee Compensation Plans - Assumptions (Details)
12 Months Ended
Dec. 31, 2023
year
$ / shares
Dec. 31, 2022
year
$ / shares
Disclosure of share-based payment arrangements [Abstract]    
Expected life (years) | year 4.5 4.5
Expected volatility 30.10% 44.30%
Expected dividend yield 2.70% 2.70%
Risk-free interest rate 3.80% 3.40%
Weighted average exercise price (CAD$) $ 21.18 $ 22.95
Weighted average fair value (CAD$) $ 6.01 $ 7.69