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Goodwill and Other Intangible Assets (Schedule of Finite-Lived Intangible Assets, Future Amortization Expense) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]    
2020 $ 38.5  
2021 30.2  
2022 28.3  
2023 19.8  
2024 18.1  
2025 and thereafter 2.3  
Total $ 137.2 $ 112.6