XML 54 R44.htm IDEA: XBRL DOCUMENT v3.25.3

Description of Business (Details) $ in Millions	1 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) item shares	Aug. 31, 2025 USD ($)	Mar. 31, 2025 USD ($) shares	Sep. 30, 2025 USD ($) item	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) item shares	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Description of Business [Line Items]
Pre-tax gain on disposition of assets				$ 218	$ (1)	$ 262	$ (6)
Energy
Description of Business [Line Items]
Pre-tax gain on disposition of assets				(4)		(4)	$ (1)
Real Estate Segment
Description of Business [Line Items]
Pre-tax gain on disposition of assets		$ 223		223		$ 271
Real Estate Segment | TEB LLC
Description of Business [Line Items]
Total consideration		$ 247
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
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary						70.00%
Viskase | Private Placement
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary						92.00%
Additional common stock (in shares) | shares	7,042,254		7,142,858
Additional common stock value	$ 5		$ 15
CVR Partners | Energy
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary						3.00%
Investment Funds
Description of Business [Line Items]
Fair value of investment in subsidiary	$ 2,400			$ 2,400		$ 2,400		$ 2,700
CVR Partners | CVR Energy
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary						100.00%
Vivus | Pharma
Description of Business [Line Items]
Number of approved therapies | item						2
Number of product candidates in active clinical development | item						2
Number of product candidates | item	2			2		2
CVR Energy
Description of Business [Line Items]
Purchase of additional interests in consolidated subsidiaries						$ 65
Number of shares acquired | shares						3,726,090
CVR Partners
Description of Business [Line Items]
Number of partnership units acquired | shares						98,082
Purchase price						$ 7

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

X

- 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

X

- Definition

The number of partnership units acquired during the period.

+ References

No definition available.

+ Details

Name:	iep_NumberOfPartnershipUnitsAcquired
Namespace Prefix:	iep_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- Definition

Number of product candidates in early stage development.

+ References

No definition available.

+ Details

Name:	iep_NumberOfProductCandidatesInEarlyStageDevelopment
Namespace Prefix:	iep_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the number of shares acquired.

+ References

No definition available.

+ Details

Name:	iep_NumberOfSharesAcquired
Namespace Prefix:	iep_
Data Type:	xbrli:sharesItemType
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

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

+ Details

Name:	us-gaap_GainLossOnDispositionOfAssets1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482987/272-10-50-3

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482987/272-10-50-3

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Cash outflow related to the acquisition or continued holding of limited partnership interests held for investment purposes.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireLimitedPartnershipInterests
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockConsiderationReceivedPerTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
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

No definition available.

+ Details

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

X

- Details

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

X

- Details

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=iep_TebLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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

X

- Details

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