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Goodwill and Purchased Intangible Assets, Estimated Future Amortization Expense Intangible Assets (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
Remainder of 2015 $ 16.6us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2016 11.6us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2017 7.0us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2018 5.1us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2019 4.9us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Thereafter 5.3us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
Finite-lived intangible assets, net $ 50.5us-gaap_FiniteLivedIntangibleAssetsNet