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Goodwill and Other Intangible Assets (Schedule of Finite-Lived Intangible Assets, Future Amortization Expense) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]    
Remainder of 2020 $ 10.2  
2021 31.2  
2022 29.2  
2023 25.4  
2024 14.7  
2025 and thereafter 2.6  
Net Book Value $ 113.3 $ 137.2