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Financial Instruments Derivative Activities Table (Details) (USD $) In Millions, unless otherwise specified | Jun. 30, 2012
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Credit default swaps [Member] |
Primary underlying risk: |
Long Notional Exposure | $ 8
Short Notional Exposure | 0
Equity swaps [Member] |
Primary underlying risk: |
Long Notional Exposure | 4
Short Notional Exposure | 9,340
Foreign currency fowards [Member] |
Primary underlying risk: |
Long Notional Exposure | 77
Short Notional Exposure | 1,428
Interest rate swap contracts [Member] |
Primary underlying risk: |
Long Notional Exposure | 1,253
Short Notional Exposure | 0
Commodity contracts [Member] |
Primary underlying risk: |
Long Notional Exposure | 81
Short Notional Exposure | $ 7

X
- Definition Notional Exposure of Derivatives, Long Position + References No definition available. + Details
Name: | iep_NotionalExposureOfDerivativesLongPosition
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
Name: | iep_PrimaryUnderlyingRiskAbstract
Namespace Prefix: | iep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration