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Goodwill and Other Intangible Assets (Schedule of Finite-Lived Intangible Assets, Future Amortization Expense) (Details) - USD ($)
$ in Millions
Jun. 30, 2016
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]    
Remainder of 2016 $ 9.3  
2017 18.1  
2018 17.6  
2019 12.8  
2020 7.6  
2021 and thereafter 4.3  
Net Book Value $ 69.7 $ 110.5