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Retirement Benefits Schedule of Net Funded Status (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Compensation and Retirement Disclosure [Abstract]    
Funded status, end of year $ (2.3)us-gaap_DefinedBenefitPlanFundedStatusOfPlan $ (12.6)us-gaap_DefinedBenefitPlanFundedStatusOfPlan
Other noncurrent liabilities (2.3)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent (12.6)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
Net amounts recognized $ (2.3)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet $ (12.6)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet