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Related Party Notes Receivable, Net (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Related Party Notes Receivable, Net |  |  |
Related party notes receivable, gross | $ 19 |  |
Less: Allowance for expected credit losses | 12 |  | $ 12
Related party notes receivable, net | 7 |  | $ 11
Allowance for expected credit losses: |  |  |
Beginning Balance | 12 |  |
Write-offs | 0 | $ 116 |
Ending Balance | $ 12 |  |

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- Definition The amount of allowance for expected credit losses on related party notes receivable. + References No definition available. + Details
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Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | iep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of allowance for expected credit losses on related party notes receivable, write-offs. + References No definition available. + Details
Name: | iep_ExpectedCreditLossesOnRelatedPartyNotesReceivableWriteOffs
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of related party notes receivable, gross. + References No definition available. + Details
Name: | iep_RelatedPartyNotesReceivableGross
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | iep_RelatedPartyNotesReceivableNetAbstract
Namespace Prefix: | iep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(5)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479617/946-210-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481990/310-10-45-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant