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Intangible Assets And Goodwill (Future Estimated Amortization Expense) (Details)
$ in Millions
Mar. 31, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Remainder of 2020 $ 231.7
2021 308.9
2022 308.5
2023 307.2
2024 300.5
2025 300.3
Thereafter $ 2,790.8