XML 53 R43.htm IDEA: XBRL DOCUMENT
v3.8.0.1

(Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jan. 31, 2018 | Jan. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Description of Business [Line Items] |  |  |  |  |
Payments to acquire additional interest in subsidiaries |  |  | $ 0 | $ 252 |
Icahn Enterprises Holdings |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 99.00% |  |
Payments to acquire additional interest in subsidiaries |  |  | $ 0 | $ 252 |
Investment Funds |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Fair value of interest in subsidiary |  |  | $ 3,200 |  | $ 3,000
CVR Refining |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 3.90% |  |
CVR Energy |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 82.00% |  |
ARI |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 62.20% |  |
Tropicana |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 83.90% |  |
Ferrous Resources |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 77.20% |  |
Viskase |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 78.60% |  |
Icahn Enterprises G.P. |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  | 1.00% |  |
General partner ownership interest in Icahn Enterprises Holdings |  |  | 1.00% |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  |  | 1.99% |  |
Mr. Icahn and affiliates |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  | 91.00% |  |
Automotive Segment | Federal-Mogul |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 100.00% |  |
Payments to acquire additional interest in subsidiaries |  | $ 305 |  |  |
Energy Segment | CVR Refining |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 66.00% |  |
Energy Segment | CVR Partners |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 34.00% |  |
Food Packaging Segment | Viskase |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Proceeds From Rights Offering | $ 50 |  |  |  |
Payments to Acquire Interest in Subsidiaries and Affiliates | $ 44 |  |  |  |

X
- Definition [Line Items] for Description of Business + References No definition available. + Details
Name: | iep_DescriptionofBusinessLineItems
Namespace Prefix: | iep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Aggregate Ownership interest of Parent and Holding Company Subsidiaries + References No definition available. + Details
Name: | iep_LimitedLiabilityCompanyLlcOrLimitedPartnershipLpManagingMemberOrGeneralPartnerAggregateOwnershipInterestOfParentAndHoldingCompanySubsidiaries
Namespace Prefix: | iep_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds From Rights Offering + References No definition available. + Details
Name: | iep_ProceedsFromRightsOffering
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Subsidiary of Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest + References No definition available. + Details
Name: | iep_SubsidiaryOfLimitedLiabilityCompanyLlcOrLimitedPartnershipLpManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix: | iep_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value of investment held in the subsidiary investment funds by the limited liability company or limited partnership. + References No definition available. + Details
Name: | iep_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterestFairValue
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow associated with the purchase of noncontrolling interest during the period. + References Reference 1: 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=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity). + References Reference 1: 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=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611443-123010 + Details
Name: | us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=iep_IcahnEnterprisesHoldingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_InvestmentFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_CvrRefiningLpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_CvrEnergyIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_AriMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_TropicanaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_FerrousResourcesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_ViskaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | iep_MembersOrPartnersAxis=iep_IcahnEnterprisesGPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | iep_MembersOrPartnersAxis=iep_PrincipalOwnersAndAffiliatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=iep_AutomotiveSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_FederalMogulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=iep_EnergySegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_CvrPartnersLpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=iep_FoodPackagingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |