XML 57 R48.htm IDEA: XBRL DOCUMENT v3.22.1
Share-Based Compensation and Capital Stock - Weighted Average Assumptions Of Black-Scholes Option-Pricing Model (Details) - Stock options
3 Months Ended
Mar. 31, 2022
$ / shares
Share-Based Compensation and Capital Stock [Line Items]  
Risk-free interest rate 1.92%
Expected volatility 29.39%
Expected life of stock option 5 years 10 months 24 days
Dividend yield 0.65%
Requisite service period 4 years
Contractual life 10 years
Weighted average fair value of options granted (in usd per share) $ 43.25