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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]      
Pension tax effect $ (3.4)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent $ (2.0)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent  
Derivative instruments, tax effect (0.9)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax (0.8)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax (0.7)us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax
Foreign currency adjustments, tax effect     $ (2.7)us-gaap_OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToNoncontrollingInterest