XML 68 R58.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Goodwill and Intangible Assets, Net Definite-lived and Indefinite-lived Intangible Assets Table (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Definite-lived intangible assets: [Abstract] |  |
Gross carrying amount of definite-lived intangible assets | $ 1,571 | $ 1,570
Accumulated amortization of definite-lived intangible assets | (813) | (788)
Net carrying amount of definite-lived intangible assets | 758 | 782
Indefinite-lived intangible assets: [Abstract] |  |
Net carrying amount of indefinite-lived intangible assets | 353 | 353
Intangible assets, net | 1,111 | 1,135
Trademarks and brand names |  |
Indefinite-lived intangible assets: [Abstract] |  |
Net carrying amount of indefinite-lived intangible assets | 316 | 316
Gaming licenses |  |
Indefinite-lived intangible assets: [Abstract] |  |
Net carrying amount of indefinite-lived intangible assets | 37 | 37
Customer relationships |  |
Definite-lived intangible assets: [Abstract] |  |
Gross carrying amount of definite-lived intangible assets | 1,084 | 1,084
Accumulated amortization of definite-lived intangible assets | (555) | (538)
Net carrying amount of definite-lived intangible assets | 529 | 546
Developed technology |  |
Definite-lived intangible assets: [Abstract] |  |
Gross carrying amount of definite-lived intangible assets | 143 | 143
Accumulated amortization of definite-lived intangible assets | (118) | (117)
Net carrying amount of definite-lived intangible assets | 25 | 26
In-place leases |  |
Definite-lived intangible assets: [Abstract] |  |
Gross carrying amount of definite-lived intangible assets | 121 | 121
Accumulated amortization of definite-lived intangible assets | (95) | (92)
Net carrying amount of definite-lived intangible assets | 26 | 29
Gasification technology license |  |
Definite-lived intangible assets: [Abstract] |  |
Gross carrying amount of definite-lived intangible assets | 60 | 60
Accumulated amortization of definite-lived intangible assets | (14) | (14)
Net carrying amount of definite-lived intangible assets | 46 | 46
Other |  |
Definite-lived intangible assets: [Abstract] |  |
Gross carrying amount of definite-lived intangible assets | 163 | 162
Accumulated amortization of definite-lived intangible assets | (31) | (27)
Net carrying amount of definite-lived intangible assets | $ 132 | $ 135

X
- Definition Finite-Lived Intangible Assets, Gross and Net [Abstract] + References No definition available. + Details
Name: | iep_FiniteLivedIntangibleAssetsGrossAndNetAbstract
Namespace Prefix: | iep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Indefinite-Lived Intangible Assets, Gross and Net [Abstract] + References No definition available. + Details
Name: | iep_IndefiniteLivedIntangibleAssetsGrossAndNetAbstract
Namespace Prefix: | iep_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_IntangibleAssetsNetExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksAndTradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=iep_GamingLicenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_DevelopedTechnologyRightsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=iep_GasificationTechnologyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_UnclassifiedIndefinitelivedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |