XML 53 R43.htm IDEA: XBRL DOCUMENT
v3.10.0.1

(Details) - USD ($) $ in Millions |  | 1 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 27, 2018 | Jan. 31, 2018 | Jan. 31, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Apr. 16, 2018 | Apr. 10, 2018
Description of Business [Line Items] |  |  |  |  |  |  |  |  |
Payments to acquire additional interest in subsidiaries |  |  |  | $ 0 | $ 254 |  |  |  |
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 | $ 254 |  |  |  |
Investment Funds |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |
Fair value of interest in subsidiary |  |  |  | $ 3,300 |  | $ 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% |  |  |  |  |
Aggregate consideration for business to be disposed of |  |  |  |  |  |  |  | $ 1,850 |
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% |  | 74.60% |  |  |
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 |  |  |  | 91.30% |  |  |  |  |
Automotive Segment | Federal-Mogul |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  | 100.00% |  |  | 82.00% |  |
Payments to acquire additional interest in subsidiaries |  |  | $ 305 |  |  |  |  |  |
Aggregate consideration for business to be disposed of |  |  |  |  |  |  |  |  | $ 5,400
Cash consideration to be received for business to be disposed of |  |  |  |  |  |  |  |  | $ 800
Total equity consideration to be received for business to be disposed of (in shares) |  |  |  |  |  |  |  |  | 29,500,000
Non-voting equity consideration to be received for business to be disposed of (in shares) |  |  |  |  |  |  |  |  | 23,800,000
Optional reduction in in non-voting equity consideration for business to be disposed of (in shares) |  |  |  |  |  |  |  |  | 7,300,000
Contract termination fee for business to be disposed of |  |  |  |  |  |  |  |  | $ 200
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 subsidiary rights offering |  | $ 50 |  |  |  |  |  |  |
Payments for additional investment in subsidiary |  | $ 44 |  |  |  |  |  |  |
Subsequent event | CVR Refining |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |
Common units validly tendered and not properly withdrawn (common units) | 21,625,106 |  |  |  |  |  |  |  |
Subsequent event | CVR Energy |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary | 70.80% |  |  |  |  |  |  |  |
Subsidiary common stock issued in exchange for additional interest in CVRR (shares) | 13,699,505 |  |  |  |  |  |  |  |
Subsequent event | Energy Segment | CVR Refining |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary | 84.50% |  |  |  |  |  |  |  |

X
- Definition Aggregate consideration for business to be disposed of + References No definition available. + Details
Name: | iep_Aggregateconsiderationforbusinesstobedisposedof
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition cash consideration for business to be disposed of + References No definition available. + Details
Name: | iep_Cashconsiderationforbusinesstobedisposedof
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Common units validly tendered and not properly withdrawn + References No definition available. + Details
Name: | iep_Commonunitsvalidlytenderedandnotproperlywithdrawn
Namespace Prefix: | iep_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition consideration in non-voting shares for business to be disposed of + References No definition available. + Details
Name: | iep_Considerationinnonvotingsharesforbusinesstobedisposedof
Namespace Prefix: | iep_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition consideration in shares for business to be disposed of + References No definition available. + Details
Name: | iep_Considerationinsharesforbusinesstobedisposedof
Namespace Prefix: | iep_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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 reduction in consideration in non-voting shares for business to be disposed of + References No definition available. + Details
Name: | iep_Reductioninconsiderationinnonvotingsharesforbusinesstobedisposedof
Namespace Prefix: | iep_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition shares of subsidiary common stock + References No definition available. + Details
Name: | iep_Sharesofsubsidiarycommonstock
Namespace Prefix: | iep_
Data Type: | xbrli:sharesItemType
Balance Type: | na
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 termination clause + References No definition available. + Details
Name: | iep_Terminationclause
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: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |