XML 98 R55.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

(Details) - USD ($) $ in Millions |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2019 | Jan. 29, 2019 | Dec. 05, 2018 | Oct. 01, 2018 | Aug. 01, 2018 | Aug. 31, 2018 | Jan. 31, 2018 | Aug. 31, 2017 | Jan. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Affiliate ownership interest |  |  |  |  |  |  |  |  |  |  |  | 98.01% |  |
Purchase of additional interests in consolidated subsidiaries |  |  |  |  |  |  |  |  |  |  |  | $ 241 | $ 5 | $ 349
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  | 253 | 84 | 2,163
Proceeds from disposition of assets |  |  |  |  |  |  |  |  |  |  |  | 505 | 3,370 | 1,983
Seller financing secured mortgages resulting from disposition of assets |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 375
Energy Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  | 4 | (6) | (3)
Automotive Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  | (4) | (1) | 5
Food Packaging Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Real Estate Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  | $ 89 |  | $ 456 |  |  |  | 0 | 89 | 496
Proceeds from disposition of assets |  |  |  |  |  | $ 179 |  | 225 |  |  |  |  |  |
Seller financing secured mortgages resulting from disposition of assets |  |  |  |  |  |  |  | 375 |  |  |  |  |  |
Total consideration received from sale of asset |  |  |  |  |  |  |  | 600 |  |  |  |  |  |
Real Estate Segment | First Mortgage |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Seller financing secured mortgages resulting from disposition of assets |  |  |  |  |  |  |  | 345 |  |  |  |  |  |
Real Estate Segment | Second Mortgage |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Seller financing secured mortgages resulting from disposition of assets |  |  |  |  |  |  |  | $ 30 |  |  |  |  |  |
Railcar Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  | 0 | 5 | 1,664
Mining Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  | $ 252 | (3) | 0
Icahn Enterprises Holdings |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  |  |  |  |  |  |  |  | 99.00% |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  | $ 253 | 84 | 2,163
Proceeds from disposition of assets |  |  |  |  |  |  |  |  |  |  |  | 505 | 3,370 | 1,983
Investment Funds |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of investment in subsidiary |  |  |  |  |  |  |  |  |  | $ 4,300 | $ 5,100 | $ 4,300 | $ 5,100 |
CVR Refining | Energy Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  | 3.90% |  |  |  |  |  |  |  |  |  |  |  |
Common units validly tendered and not properly withdrawn |  |  |  |  | 21,625,106 |  |  |  |  |  |  |  |  |
Purchase of additional interests in consolidated subsidiaries |  | $ 241 |  |  |  |  |  |  |  |  |  |  |  |
CVR Partners | Energy Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  |  |  |  |  |  |  |  | 34.40% |  |
CVR Energy | Energy Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  | 80.60% |  |  |  |  |  |  |  |  |  | 70.80% |  |
Equity issued to acquire additional interest in consolidated subsidiary (number of units) |  |  |  |  | 13,699,549 |  |  |  |  |  |  |  |  |
Change in equity as a result of acquisition of additional interest in consolidated subsidiary |  |  |  |  | $ 99 |  |  |  |  |  |  |  |  |
Viskase | Food Packaging Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  |  |  |  |  |  |  |  | 78.60% | 74.60% |
Proceeds from rights offering |  |  |  |  |  |  | $ 50 |  |  |  |  |  |  |
Contribution to subsidiary |  |  |  |  |  |  | $ 44 |  |  |  |  |  |  |
ARL | Railcar Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  |  | $ 5 | 1,700
Proceeds from disposition of assets |  |  |  |  |  |  |  |  |  |  |  |  | $ 17 |
aggregate consideration for business disposed of |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,800
Ferrous Resources | Mining Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary | 77.20% |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  |  | $ 252 |  |
Proceeds from disposition of assets |  |  |  |  |  |  |  |  |  |  |  | $ 463 |  |
Aggregate consideration for business to be disposed of |  |  | $ 550 |  |  |  |  |  |  |  |  |  |  |
Federal-Mogul |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 82.00%
Purchase of additional interests in consolidated subsidiaries |  |  |  |  |  |  |  |  | $ 305 |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  | $ 251 |  |  |  |
Proceeds from disposition of assets |  |  |  | $ 800 |  |  |  |  |  |  |  |  |  |
consideration in shares for business disposed of |  |  |  | 29,500,000 |  |  |  |  |  |  |  |  |  |
consideration in non-voting shares for business disposed of |  |  |  | 23,800,000 |  |  |  |  |  |  |  |  |  |
consideration in voting shares for business disposed of |  |  |  | 5,700,000 |  |  |  |  |  |  |  |  |  |
investment, ownership percentage |  |  |  | 9.90% |  |  |  |  |  |  |  |  |  |
fair market value of shares obtained as consideration for business disposed of |  |  |  | $ 1,200 |  |  |  |  |  |  |  |  |  |
Tropicana |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  |  |  |  |  |  |  |  |  | 83.90% | 72.50%
Purchase of additional interests in consolidated subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 95
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  | 779 |  |  |
Proceeds from disposition of assets |  |  |  | 1,500 |  |  |  |  |  |  |  |  |  |
aggregate consideration for business disposed of |  |  |  | $ 1,800 |  |  |  |  |  |  |  |  |  |
Subsidiary repurchase of treasury stock |  |  |  |  |  |  |  |  |  |  |  |  |  | 36
ARI |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on disposition of assets, net |  |  |  |  |  |  |  |  |  |  | $ 400 |  |  |
Proceeds from disposition of assets |  |  | $ 831 |  |  |  |  |  |  |  |  |  |  |
ADS and Precision Tune | Automotive Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 162
Mr. Icahn and affiliates |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Affiliate ownership interest |  |  |  |  |  |  |  |  |  |  |  | 92.00% |  |
Icahn Enterprises G.P. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  |  |  |  |  |  |  |  |  |  |  | 1.99% |  |
Icahn Enterprises G.P. | Icahn Enterprises Holdings |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |

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

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 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 disposed of + References No definition available. + Details
Name: | iep_Considerationinnonvotingsharesforbusinessdisposedof
Namespace Prefix: | iep_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Definition Contribution to subsidiary + References No definition available. + Details
Name: | iep_Contributiontosubsidiary
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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 fair market value of shares obtained as consideration for business disposed of + References No definition available. + Details
Name: | iep_Fairmarketvalueofsharesobtainedasconsiderationforbusinessdisposedof
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Ownership percentage in a non-consolidated entity by non-controlling owner + References No definition available. + Details
Name: | iep_Investmentownershippercentage
Namespace Prefix: | iep_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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 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 Subsidiary repurchase of treasury stock + References No definition available. + Details
Name: | iep_Subsidiaryrepurchaseoftreasurystock
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Total consideration received from sale of asset + References No definition available. + Details
Name: | iep_Totalconsiderationreceivedfromsaleofasset
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents a sale (new stock issuance) by a subsidiary to noncontrolling interests (third parties, parties directly or indirectly unrelated to parent) during the period. The capital transaction by subsidiary does not result in a loss of control by the parent, but does effect a change in total (consolidated) equity attributable to the parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 + Details
Name: | us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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 -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + 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 -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://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_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The value of the noncash (or part noncash) consideration received in a transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of a transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
Name: | us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&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 business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireBusinessesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate cash proceeds received from a combination of transactions in which noncurrent assets are sold, which may include the sale of a business, an investment in an affiliate (including an equity method investee), property, plant and equipment and intangible assets. Excludes sales of trading, available-for-sale, and held-to-maturity securities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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://fasb.org/us-gaap/role/ref/legacyRef -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: | us-gaap_StatementBusinessSegmentsAxis=iep_EnergySegmentMember
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: | us-gaap_StatementBusinessSegmentsAxis=iep_FoodPackagingSegmentMember
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: | iep_MortgageTypeAxis=us-gaap_FirstMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | iep_MortgageTypeAxis=us-gaap_SecondMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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_CvrPartnersLpMember
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_ViskaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=iep_ArlMember
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_FederalMogulMember
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_AriMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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