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Income Taxes - Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2015
Income Tax Disclosure [Abstract]      
Income Taxes Paid $ 14.6us-gaap_IncomeTaxesPaid $ 6.4us-gaap_IncomeTaxesPaid  
Subsequent Event [Line Items]      
Income Tax Expense (Benefit) 4.3us-gaap_IncomeTaxExpenseBenefit 16.7us-gaap_IncomeTaxExpenseBenefit  
Subsequent Event [Member]      
Subsequent Event [Line Items]      
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions     3.5us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Income Tax Expense (Benefit)     $ 2.3us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember