XML 124 R58.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Investments and Related Matters Investment Segment (Details) (Investment Segment [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value of equity method investment under fair value option | $ 1 iep_FairValueOfEquityMethodInvestmentUnderFairValueOption | $ 1 iep_FairValueOfEquityMethodInvestmentUnderFairValueOption |
Portion of trading (losses) gains that relates to trading securities still held at balance sheet date | (570)us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss | 2,900 us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss | 697 us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss
Equity Method Investments [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Fair value option, recorded gains (losses) | $ 1 us-gaap_FairValueOptionChangesInFairValueGainLoss1 / us-gaap_InvestmentTypeAxis = us-gaap_EquityMethodInvestmentsMember / us-gaap_StatementBusinessSegmentsAxis = iep_InvestmentSegmentMember | $ 140 us-gaap_FairValueOptionChangesInFairValueGainLoss1 / us-gaap_InvestmentTypeAxis = us-gaap_EquityMethodInvestmentsMember / us-gaap_StatementBusinessSegmentsAxis = iep_InvestmentSegmentMember | $ 310 us-gaap_FairValueOptionChangesInFairValueGainLoss1 / us-gaap_InvestmentTypeAxis = us-gaap_EquityMethodInvestmentsMember / us-gaap_StatementBusinessSegmentsAxis = iep_InvestmentSegmentMember

X
- Definition Fair Value of Equity Method Investment Under Fair Value Option + References No definition available. + Details
Name: | iep_FairValueOfEquityMethodInvestmentUnderFairValueOption
Namespace Prefix: | iep_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 + Details
Name: | us-gaap_FairValueOptionChangesInFairValueGainLoss1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of unrealized holding gain (loss) recognized in the income statement for investments in debt and equity securities and other forms of securities that provide ownership interests classified as trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(c)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560 + Details
Name: | us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_EquityMethodInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |