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Intangible Assets and Goodwill - Estimated Future Amortization Expense (Details)
$ in Millions
Sep. 30, 2015
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2015 $ 12.1
2016 38.3
2017 35.2
2018 19.2
2019 9.0
Thereafter 12.1
Total $ 125.9