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Employee Benefit Plans Funded Status of Plans (Additional Information) (Details) (Pension Plans, Defined Benefit, USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Pension Plans, Defined Benefit
    
Pension and Other Postretirement Defined Benefit Plans, Liabilities $ 85us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember		 $ 80us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= us-gaap_PensionPlansDefinedBenefitMember