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Goodwill and Intangible Assets (Schedule Of Expected Annual Amortization Expense Related To Intangible Assets For The Next Five Years) (Details)
$ in Millions
Jun. 30, 2017
USD ($)
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]  
Remaining 2017 $ 5.0
2018 15.8
2019 14.0
2020 11.5
2021 8.5
Thereafter $ 6.0