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Share-based Payments (Summary of Stock Option Activity) (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Stock options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding beginning balance, Common shares under option 2,730,295  
Granted, Common shares under option 0  
Assumed in acquisition, Common shares under option 187,727  
Exercised, Common shares under option (19,729)  
Forfeited, Common shares under option (52,978)  
Outstanding ending balance, Common shares under option 2,845,315 2,730,295
Exercisable, Common shares under option 2,069,936  
Outstanding beginning balance, Weighted average exercise price (per share) $ 46.88  
Assumed in acquisition, Weighted average exercise price (per share) 50.96  
Exercised, Weighted average exercise price (per share) 34.01  
Forfeited, Weighted average exercise price (per share) 45.33  
Outstanding ending balance, Weighted average exercise price (per share) 47.26 $ 46.88
Exercisable, Weighted average exercise price (per share) $ 43.61  
Outstanding, Weighted average remaining contractual life (in years) 6 years 6 months 7 years 3 months 18 days
Exercisable, Weighted average remaining contractual life (in years) 5 years 9 months 18 days  
Outstanding beginning balance, Aggregate intrinsic value $ 31.2  
Assumed in acquisition, Aggregate intrinsic value 1.7  
Exercised, Aggregate intrinsic value 0.5  
Outstanding ending balance, Aggregate intrinsic value 28.7 $ 31.2
Exercisable, Aggregate intrinsic value $ 27.8  
Premium Priced Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding beginning balance, Common shares under option 1,118,432  
Granted, Common shares under option 0  
Forfeited, Common shares under option (38,635)  
Outstanding ending balance, Common shares under option 1,079,797 1,118,432
Outstanding beginning balance, Weighted average exercise price (per share) $ 91.26  
Forfeited, Weighted average exercise price (per share) 91.19  
Outstanding ending balance, Weighted average exercise price (per share) $ 91.26 $ 91.26
Outstanding, Weighted average remaining contractual life (in years) 4 years 3 months 18 days 4 years 8 months 12 days