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Intangible Assets And Goodwill (Future Estimated Amortization Expense) (Details)
$ in Millions
Mar. 31, 2017
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Remainder of 2017 $ 71.5
2018 94.7
2019 94.7
2020 94.7
2021 94.7
2022 94.7
Thereafter $ 1,422.8