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Capital Stock (Option Grant Assumptions) (Details) - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Capital Stock [Abstract]      
Weighted-average fair value per share $ 68.08 $ 53.35 $ 39.34
Risk-free interest rate 1.80% 0.80% 1.40%
Expected dividend yield 1.00% 1.20% 1.00%
Expected stock price volatility 27.00% 26.90% 18.90%
Expected option life (years) 5 years 10 months 24 days 5 years 10 months 24 days 5 years 9 months 18 days