XML 134 R54.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Fair Value Measurements Narrative (Details) (Investment Segment [Member], USD $) In Millions, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2013
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
Change in fair value of loan from 1 percent change in risk premium | 2.00%
Level 3 [Member] |
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
Unrealized losses included in earnings related to Level 3 investments | $ 4

X
- Definition Fair Value, Option, Changes in Instrument Specific Credit Risk, Effect of One Percent Change to Risk Premium on Fair Value in Percentage of Change + References No definition available. + Details
Name: | iep_FairValueOptionChangesInInstrumentSpecificCreditRiskEffectOfOnePercentChangeToRiskPremiumOnFairValueInPercentageOfChange
Namespace Prefix: | iep_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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