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v2.4.1.9

Operating Units Automotive Segment (Details) (USD $) | 12 Months Ended | 3 Months Ended | 1 Months Ended
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | Jan. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |
Restructuring | $ 84,000,000 us-gaap_RestructuringCharges | $ 50,000,000 us-gaap_RestructuringCharges | $ 31,000,000 us-gaap_RestructuringCharges |  |
Goodwill, Period Increase (Decrease) | 32,000,000 us-gaap_GoodwillAcquiredDuringPeriod |  |  |  |
Automotive Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Restructuring | 86,000,000 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember | 40,000,000 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember | 26,000,000 us-gaap_RestructuringCharges / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember |  |
Goodwill, Period Increase (Decrease) | 32,000,000 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember |  |  |  |
Federal-Mogul [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Percentage of equity ownership in subsidiary | 80.70%us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest / dei_LegalEntityAxis = iep_FederalMogulMember |  |  |  |
Gross amount of transferred receivables under factoring arrangement | 306,000,000 us-gaap_InterestsContinuedToBeHeldByTransferorFairValue / dei_LegalEntityAxis = iep_FederalMogulMember | 271,000,000 us-gaap_InterestsContinuedToBeHeldByTransferorFairValue / dei_LegalEntityAxis = iep_FederalMogulMember |  |  |
Gross amount of transferred receivables under factoring arrangements qualifying as sales | 293,000,000 iep_GrossAccountsReceivableFactoredQualifyingAsSales / dei_LegalEntityAxis = iep_FederalMogulMember | 258,000,000 iep_GrossAccountsReceivableFactoredQualifyingAsSales / dei_LegalEntityAxis = iep_FederalMogulMember |  |  |
Proceeds from transferred receivables under factoring arrangements qualifying as sales | 1,700,000,000 us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers / dei_LegalEntityAxis = iep_FederalMogulMember | 1,500,000,000 us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers / dei_LegalEntityAxis = iep_FederalMogulMember | 1,500,000,000 us-gaap_CashFlowsBetweenTransfereeAndTransferorProceedsFromNewTransfers / dei_LegalEntityAxis = iep_FederalMogulMember |  |
Expenses associated with transferred receivables under factoring arrangements | 6,000,000 us-gaap_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale / dei_LegalEntityAxis = iep_FederalMogulMember | 7,000,000 us-gaap_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale / dei_LegalEntityAxis = iep_FederalMogulMember | 7,000,000 us-gaap_SecuritizationFinancialAssetForWhichTransferIsAccountedAsSaleGainLossOnSale / dei_LegalEntityAxis = iep_FederalMogulMember |  |
Maximum exposure associated with transferred receivables under factoring arrangements | 17,000,000 us-gaap_ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding / dei_LegalEntityAxis = iep_FederalMogulMember | 21,000,000 us-gaap_ContinuingInvolvementWithTransferredFinancialAssetsPrincipalAmountOutstanding / dei_LegalEntityAxis = iep_FederalMogulMember |  |  |
Restructuring | 86,000,000 us-gaap_RestructuringCharges / dei_LegalEntityAxis = iep_FederalMogulMember | 40,000,000 us-gaap_RestructuringCharges / dei_LegalEntityAxis = iep_FederalMogulMember | 26,000,000 us-gaap_RestructuringCharges / dei_LegalEntityAxis = iep_FederalMogulMember |  |
Restructuring and Related Cost, Expected Cost Remaining | 13,000,000 us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1 / dei_LegalEntityAxis = iep_FederalMogulMember |  |  |  |
Proceeds from rights offering |  |  |  | 500,000,000 iep_ProceedsFromRightsOffering / dei_LegalEntityAxis = iep_FederalMogulMember |
Restructuring 2013 [Member] [Member] | Federal-Mogul [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Restructuring | 82,000,000 us-gaap_RestructuringCharges / dei_LegalEntityAxis = iep_FederalMogulMember / us-gaap_RestructuringPlanAxis = iep_Restructuring2013MemberMember | 39,000,000 us-gaap_RestructuringCharges / dei_LegalEntityAxis = iep_FederalMogulMember / us-gaap_RestructuringPlanAxis = iep_Restructuring2013MemberMember |  |  |
Restructuring, expected cost | 134,000,000 us-gaap_RestructuringAndRelatedCostExpectedCost1 / dei_LegalEntityAxis = iep_FederalMogulMember / us-gaap_RestructuringPlanAxis = iep_Restructuring2013MemberMember |  |  |  |
Honeywell [Member] | Automotive Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  | 169,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = iep_HoneywellMember / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred |  |  |  |  | 15,000,000 us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred / us-gaap_BusinessAcquisitionAxis = iep_HoneywellMember / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember
Business Combination, Assets and Liabilities Arising from Contingencies, Amount Recognized, Net | 184,000,000 us-gaap_BusinessCombinationAssetsAndLiabilitiesArisingFromContingenciesAmountRecognized / us-gaap_BusinessAcquisitionAxis = iep_HoneywellMember / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember |  |  |  |
Business Combination, Acquisition Related Costs | 7,000,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_BusinessAcquisitionAxis = iep_HoneywellMember / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember |  |  |  |
Affinia [Member] | Automotive Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Payments to Acquire Businesses, Gross |  |  |  |  | 149,000,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = iep_AffiniaMember / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember
business combinations, recognized identifiable assets, net tangible assets | 71,000,000 iep_Businesscombinationsrecognizedidentifiableassetsnettangibleassets / us-gaap_BusinessAcquisitionAxis = iep_AffiniaMember / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember |  |  |  |
Goodwill, Period Increase (Decrease) | 26,000,000 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_BusinessAcquisitionAxis = iep_AffiniaMember / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember |  |  |  |
business combinations, recognized identifiable assets, net intangible assets | 51,000,000 iep_Businesscombinationsrecognizedidentifiableassetsnetintangibleassets / us-gaap_BusinessAcquisitionAxis = iep_AffiniaMember / us-gaap_StatementBusinessSegmentsAxis = iep_AutomotiveSegmentMember |  |  |  |
Employee Severance [Member] | Restructuring 2013 [Member] [Member] | Federal-Mogul [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Restructuring, expected cost | 127,000,000 us-gaap_RestructuringAndRelatedCostExpectedCost1 / dei_LegalEntityAxis = iep_FederalMogulMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_EmployeeSeveranceMember / us-gaap_RestructuringPlanAxis = iep_Restructuring2013MemberMember |  |  |  |
Facility Closing [Member] | Restructuring 2013 [Member] [Member] | Federal-Mogul [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Restructuring, expected cost | $ 7,000,000 us-gaap_RestructuringAndRelatedCostExpectedCost1 / dei_LegalEntityAxis = iep_FederalMogulMember / us-gaap_RestructuringCostAndReserveAxis = us-gaap_FacilityClosingMember / us-gaap_RestructuringPlanAxis = iep_Restructuring2013MemberMember |  |  |  |

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- Definition Gross accounts receivable under factoring facilities qualify as sales. + References No definition available. + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to items of consideration transferred in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1500-128463 + Details
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- Definition Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107314-111719 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition The carrying amount (fair value) as of the balance sheet date of the transferor's interests in transferred financial assets (typically securitized receivables, generally not involved in the collection of principal) following transfer of significant portions of such financial instruments to other parties. Such interests could be ancillary cash flows and interest-only strips. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=13989330&loc=d3e107314-111719 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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