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Financial Instruments Derivative Activities Table (Details) (USD $) In Millions, unless otherwise specified | Mar. 31, 2014
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Credit Default Swap, Selling Protection [Member] |
Derivative [Line Items] |
Long Notional Exposure | $ 0
Short Notional Exposure | 302
Equity swaps |
Derivative [Line Items] |
Long Notional Exposure | 1
Short Notional Exposure | 10,646
Foreign currency forwards |
Derivative [Line Items] |
Long Notional Exposure | 9
Short Notional Exposure | 1,727
Interest rate swap contracts |
Derivative [Line Items] |
Long Notional Exposure | 0
Short Notional Exposure | 63
Commodity contracts |
Derivative [Line Items] |
Long Notional Exposure | 52
Short Notional Exposure | $ 502

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- Definition Notional Exposure of Derivatives, Long Position + References No definition available. + Details
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Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Notional Exposure of Derivatives, Short Position + References No definition available. + Details
Name: | iep_NotionalExposureOfDerivativesShortPosition
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration