[Line Items] for Description of Business

No definition available.

Name:	iep_DescriptionofBusinessLineItems
Namespace Prefix:	iep_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of interest sold.

+ References

No definition available.

+ Details

Name:	iep_DisposalGroupIncludingDiscontinuedOperationPercentageOfInterestSold
Namespace Prefix:	iep_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of approved therapies.

+ References

No definition available.

+ Details

Name:	iep_NumberOfApprovedTherapies
Namespace Prefix:	iep_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of product candidate in active clinical development.

+ References

No definition available.

+ Details

Name:	iep_NumberOfProductCandidateInActiveClinicalDevelopment
Namespace Prefix:	iep_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- 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

- 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://fasb.org/us-gaap/role/ref/legacyRef
-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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

+ References

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

+ Details

Name:	us-gaap_NumberOfOperatingSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=iep_PscMetalLlcDisposalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=iep_IcahnEnterprisesHoldingsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	iep_MembersOrPartnersAxis=iep_IcahnEnterprisesGPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	iep_MembersOrPartnersAxis=iep_PrincipalOwnersAndAffiliatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=iep_IcahnEnterprisesGPMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=iep_CvrRefiningLpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=iep_CvrEnergyIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_OwnershipAxis=iep_ViskaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=iep_InvestmentFundsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=iep_VivusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=iep_PharmaSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Description of Business (Details) $ in Billions		6 Months Ended
Description of Business (Details) $ in Billions	Dec. 07, 2021	Jun. 30, 2022 USD ($) product company item	Dec. 31, 2021 USD ($)
Description of Business [Line Items]
Number of Operating Segments \| company		2
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| PSC Metals
Description of Business [Line Items]
Percentage of interest sold	100.00%
Icahn Enterprises Holdings
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		99.00%
Icahn Enterprises Holdings \| Icahn Enterprises G.P.
Description of Business [Line Items]
General partner ownership percentage in Icahn Enterprises		1.00%
Icahn Enterprises Holdings \| Mr. Icahn and affiliates
Description of Business [Line Items]
Affiliate ownership interest		86.00%
Icahn Enterprises G.P.
Description of Business [Line Items]
Aggregate general partner ownership interest of parent and operating subsidiary		1.99%
CVR Refining
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		37.00%
CVR Energy \| Energy Segment
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		71.00%
Viskase \| Private Placement
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		89.00%
Investment Funds
Description of Business [Line Items]
Fair value of investment in subsidiary \| $		$ 4.5	$ 4.2
Vivus \| Pharma Segment
Description of Business [Line Items]
Number Of Approved Therapies \| item		2
Number Of Product Candidate In Active Clinical Development \| product		1