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Stock-Based Payments (Compensation Expense And Income Tax Benefit Recognized) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 83.7 $ 84.8 $ 76.4
Income tax benefit recognized $ 14.2 $ 13.2 $ 20.6