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Share-Based Compensation (Compensation Expenses) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense $ (85.5) $ (67.1) $ (55.7)
Tax benefit (20.7) (16.3) (13.5)
Share-based compensation expense, net of tax (64.8) (50.8) (42.2)
Deferred Compensation, Share-based Payments      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense (3.9) (4.3) (1.2)
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense (17.9) (16.1) (14.1)
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense (27.3) (23.5) (19.7)
Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense (36.4) (23.2) (20.7)
Segment, Continuing Operations [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense, net of tax (64.8) (50.8) (42.6)
Segment, Discontinued Operations [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based compensation expense, net of tax $ 0.0 $ 0.0 $ 0.4