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Stock-Based Compensation (Schedule of Share-Based Payment Arrangement, Expensed and Capitalized, Amount) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Employee Stock Option |  |  |  |
Share-Based Payment Arrangement, Additional Disclosure [Abstract] |  |  |  |
Share-Based Payment Arrangement, Expense | $ 1.1 | $ 1.1 | $ 2.2 | $ 2.1
Share-Based Payment Arrangement, Expense, Tax Benefit | 0.3 | 0.3 | 0.6 | 0.6
Share-Based Payment Arrangement, Amount Capitalized | 0.5 | 0.6 | 1.0 | 1.1
Other Equity Awards [Member] |  |  |  |
Share-Based Payment Arrangement, Additional Disclosure [Abstract] |  |  |  |
Share-Based Payment Arrangement, Expense | 9.8 | 10.1 | 19.7 | 17.8
Share-Based Payment Arrangement, Expense, Tax Benefit | 2.5 | 2.6 | 5.0 | 4.6
Share-Based Payment Arrangement, Amount Capitalized | $ 4.6 | $ 4.4 | $ 9.1 | $ 7.6

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