XML 45 R35.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Goodwill and Intangible Assets, Net (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill |
| September 30, 2018 |  | December 31, 2017
| Gross Carrying Amount |  | Accumulated Impairment |  | Net Carrying Value |  | Gross Carrying Amount |  | Accumulated Impairment |  | Net Carrying Value
| (in millions)
Automotive | $ | 322 |  |  | $ | — |  |  | $ | 322 |  |  | $ | 320 |  |  | $ | — |  |  | $ | 320 |
Railcar | 7 |  |  | — |  |  | 7 |  |  | 7 |  |  | — |  |  | 7 |
Food Packaging | 7 |  |  | — |  |  | 7 |  |  | 7 |  |  | — |  |  | 7 |
| $ | 336 |  |  | $ | — |  |  | $ | 336 |  |  | $ | 334 |  |  | $ | — |  |  | $ | 334 |
Intangible assets, net |
| September 30, 2018 |  | December 31, 2017
| Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Value
| (in millions)
Definite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 396 |  |  | $ | (129 | ) |  | $ | 267 |  |  | $ | 397 |  |  | $ | (115 | ) |  | $ | 282 |
Developed technology | 4 |  |  | (4 | ) |  | — |  |  | 4 |  |  | (4 | ) |  | — |
In-place leases | 90 |  |  | (73 | ) |  | 17 |  |  | 121 |  |  | (92 | ) |  | 29 |
Gasification technology license | 60 |  |  | (15 | ) |  | 45 |  |  | 60 |  |  | (14 | ) |  | 46 |
Other | 161 |  |  | (39 | ) |  | 122 |  |  | 149 |  |  | (24 | ) |  | 125 |
| $ | 711 |  |  | $ | (260 | ) |  | $ | 451 |  |  | $ | 731 |  |  | $ | (249 | ) |  | $ | 482 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks and brand names |  |  |  |  | $ | 62 |  |  |  |  |  |  | $ | 62 |
Intangible assets, net |  |  |  |  | $ | 513 |  |  |  |  |  |  | $ | 544 |

X
- Definition Schedule of Finite-Lived and Infinite-Lived Intangible Assets, Excluding Goodwill [Table Text Block] + References No definition available. + Details
Name: | iep_ScheduleOfFiniteLivedAndInfiniteLivedIntangibleAssetsTableTextBlock
Namespace Prefix: | iep_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
Name: | us-gaap_ScheduleOfGoodwillTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration