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Share-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Total number of shares authorized by the shareholders 23,000,000.0    
Remains available for future incentive awards 10,500,000    
Share-based compensation expense $ (85.5) $ (67.1) $ (55.7)
Share-based compensation expense, net of tax (64.8) (50.8) (42.2)
Aggregate intrinsic value of options exercised, in USD $ 210.2 159.8  
Percentage Of Awards Applied To Performance Condition 50.00%    
Percentage of Awards Applied to Market Condition 50.00%    
Stock options and RSUs [Member]      
Vesting period, in years 3 years    
Stock Option [Member]      
Total unrecognized compensation cost from stock option arrangements granted under the plan, in USD $ 12.3    
Restricted Stock Units (RSUs) [Member]      
Share-based compensation expense (27.3) $ (23.5) $ (19.7)
Total unrecognized compensation cost from stock option arrangements granted under the plan, in USD $ 25.2    
Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 161,978,000,000 208,046,000,000 195,930,000,000
Share-based compensation expense $ (36.4) $ (23.2) $ (20.7)
Average fair value of stock options granted, in dollars per share $ 332,850,000 $ 207,230,000 $ 170,310,000
Total unrecognized compensation cost from stock option arrangements granted under the plan, in USD $ 14.7    
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period 3 years    
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 268,922,000,000 425,444,000,000 430,496,000,000
Share-based compensation expense $ (17.9) $ (16.1) $ (14.1)
Average fair value of stock options granted, in dollars per share $ 79,090,000.00 $ 47,530,000 $ 35,960,000
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 112,227,000,000 214,425,000,000 139,730,000,000
Average fair value of stock options granted, in dollars per share $ 287,840,000 $ 184,350,000 $ 165,070,000.00