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(Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Principal Owners and Affiliates [Member]
Entity Information [Line Items]
Affiliate ownership interest in Icahn Enterprises (in units)	108,810,845iep_LimitedLiabilityCompanyLlcOrLimitedPartnershipLpMembersOrLimitedPartnersOwnershipInterestUnits / iep_MembersOrPartnersAxis = iep_PrincipalOwnersAndAffiliatesMember
Affiliate ownership interest in Icahn Enterprises	88.40%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest / iep_MembersOrPartnersAxis = iep_PrincipalOwnersAndAffiliatesMember
Icahn Enterprises G.P. [Member]
Entity Information [Line Items]
General partner ownership percentage in Icahn Enterprises	1.00%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest / iep_MembersOrPartnersAxis = iep_IcahnEnterprisesGPMember	1.00%us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest / iep_MembersOrPartnersAxis = iep_IcahnEnterprisesGPMember
General partner ownership interest in Icahn Enterprises Holdings	1.00%iep_SubsidiaryOfLimitedLiabilityCompanyLlcOrLimitedPartnershipLpManagingMemberOrGeneralPartnerOwnershipInterest / iep_MembersOrPartnersAxis = iep_IcahnEnterprisesGPMember
Aggregate general partner ownership interest of parent and operating subsidiary	1.99%iep_LimitedLiabilityCompanyLlcOrLimitedPartnershipLpManagingMemberOrGeneralPartnerAggregateOwnershipInterestOfParentAndHoldingCompanySubsidiaries / iep_MembersOrPartnersAxis = iep_IcahnEnterprisesGPMember
Icahn Enterprises Holdings [Member]
Entity Information [Line Items]
Percentage of equity ownership in operating subsidiary	99.00%us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest / dei_LegalEntityAxis = iep_IcahnEnterprisesHoldingsMember

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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

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The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

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-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

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