XML 18 R46.htm IDEA: XBRL DOCUMENT v2.4.1.9
Operating Units Other Segments (Details) (USD $)
3 Months Ended 0 Months Ended
Mar. 31, 2015
Oct. 02, 2013
Dec. 31, 2014
Real Estate Segment [Member]      
Segment Reporting Information [Line Items]      
Number of Real Estate commercial rental properties 28us-gaap_NumberOfRealEstateProperties
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
   
Pledged assets 30,000,000us-gaap_PledgedAssetsNotSeparatelyReportedOnStatementOfFinancialPosition
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
  $ 31,000,000us-gaap_PledgedAssetsNotSeparatelyReportedOnStatementOfFinancialPosition
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
ARI [Member]      
Segment Reporting Information [Line Items]      
Percentage of equity ownership in subsidiary 55.60%us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
/ dei_LegalEntityAxis
= iep_AriMember
   
Viskase [Member]      
Segment Reporting Information [Line Items]      
Percentage of equity ownership in subsidiary 73.30%us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
/ dei_LegalEntityAxis
= iep_ViskaseMember
   
Nnumber of Manufacturing Facilities 9iep_NnumberOfManufacturingFacilities
/ dei_LegalEntityAxis
= iep_ViskaseMember
   
Number of Distribution Centers 9iep_NumberOfDistributionCenters
/ dei_LegalEntityAxis
= iep_ViskaseMember
   
Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage 70.00%iep_DisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToForeignCountriesPercentage
/ dei_LegalEntityAxis
= iep_ViskaseMember
   
ARL [Member]      
Segment Reporting Information [Line Items]      
Percentage of equity ownership in subsidiary 75.00%us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
/ dei_LegalEntityAxis
= iep_ArlMember
   
ARL [Member] | Railcar Segment [Member]      
Segment Reporting Information [Line Items]      
Percentage of equity ownership in subsidiary   75.00%us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
/ dei_LegalEntityAxis
= iep_ArlMember
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RailcarSegmentMember
 
MASSACHUSETTS | Real Estate Segment [Member]      
Segment Reporting Information [Line Items]      
Number of units of residential housing in future development 267iep_NumberOfUnitsOfResidentialHousingInFutureDevelopment
/ iep_LocationOfOperationsStateOrCountryAxis
= stpr_MA
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember
   
FLORIDA | Real Estate Segment [Member]      
Segment Reporting Information [Line Items]      
Number of units of residential housing in future development 1,327iep_NumberOfUnitsOfResidentialHousingInFutureDevelopment
/ iep_LocationOfOperationsStateOrCountryAxis
= stpr_FL
/ us-gaap_StatementBusinessSegmentsAxis
= iep_RealEstateSegmentMember