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Commitments and Contingencies Energy Minimum Required Payments Table (Details) (Energy Segment [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 bbl
CVR Energy, Inc. [Member] |  |
Loss Contingencies [Line Items] |  |
2015 | $ 126 us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary / dei_LegalEntityAxis = iep_CvrEnergyIncMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember |
2016 | 109 us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary / dei_LegalEntityAxis = iep_CvrEnergyIncMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember |
2017 | 107 us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary / dei_LegalEntityAxis = iep_CvrEnergyIncMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember |
2018 | 106 us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary / dei_LegalEntityAxis = iep_CvrEnergyIncMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember |
2019 | 105 us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary / dei_LegalEntityAxis = iep_CvrEnergyIncMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember |
Thereafter | 718 us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears / dei_LegalEntityAxis = iep_CvrEnergyIncMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember |
Total future minimum payments for unconditional purhcase obligations | 1,271 us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount / dei_LegalEntityAxis = iep_CvrEnergyIncMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember | [1]
Petroleum Transportation [Member] | CRRM [Member] |  |
Loss Contingencies [Line Items] |  |
Unconditional purchase obligation for petroleum transportation, payable ratably over nine years | $ 800 iep_UnrecordedUnconditionalPurchaseObligationsDueRatablyOverNineYears / dei_LegalEntityAxis = iep_CrrmMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = iep_PetroleumTransportationMember |
Term of unconditional purchase obligation for petroleum transportation | 20 years |
Number of barrels of petroleum to be transported pursuant to unconditional purchase obligation | 25,000 iep_UnrecordedUnconditionalPurchaseObligationsNumberOfBarrelsToBeTransported / dei_LegalEntityAxis = iep_CrrmMember / us-gaap_StatementBusinessSegmentsAxis = iep_EnergySegmentMember / us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis = iep_PetroleumTransportationMember |
[1] | This amount includes $800 million payable ratably over sixteen years pursuant to petroleum transportation service agreements between CRRM and each of TransCanada Keystone Limited Partnership and TransCanada Keystone Pipeline, LP (together, "TransCanada"). The purchase obligation reflects the exchange rate between the Canadian dollar and the U.S. dollar as of December 31, 2014, where applicable. Under the agreements, CRRM receives transportation of at least 25,000 barrels per day of crude oil with a delivery point at Cushing, Oklahoma for a term of 20 years on TransCanada's Keystone pipeline system. CRRM began receiving crude oil under the agreements in the first quarter of 2011.

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- Definition Unrecorded Unconditional Purchase Obligations, Due Ratably over Nine Years + References No definition available. + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
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- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
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