Additional Indebtedness Allowed Per Debt Covenants

No definition available.

Name:	iep_AdditionalIndebtednessAllowedPerDebtCovenants
Namespace Prefix:	iep_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Use of portion of debt proceeds

+ References

No definition available.

+ Details

Name:	iep_UseOfPortionOfDebtProceeds
Namespace Prefix:	iep_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 50

-Section 40

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 50

-Section 40

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629

+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=iep_IcahnEnterprisesHoldingsMember
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Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorDebtObligationsMember
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Debt Narrative - Senior Unsecured Notes - Icahn Enterprises (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 29, 2014	Aug. 01, 2013	Jan. 15, 2010	Jan. 21, 2014
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 2	$ 126
Senior unsecured notes [Member]
Debt Instrument [Line Items]
Additional indebtedness allowed per debt covenants	792
Senior unsecured notes [Member] \| 2022 Notes [Member]
Debt Instrument [Line Items]
Term Loan Facility			1,350
Proceeds from Issuance of Debt			1,340
Senior unsecured notes [Member] \| 2020 Notes [Member]
Debt Instrument [Line Items]
Term Loan Facility				500
Interest rate, long-term debt					6.00%
Proceeds from Issuance of Debt			493
Senior unsecured notes [Member] \| Additional 2020 Notes [Member]
Debt Instrument [Line Items]
Term Loan Facility						1,200
Interest rate, long-term debt			5.875%
Proceeds from Issuance of Debt			1,217
Senior unsecured notes [Member] \| 2019 Notes [Member]
Debt Instrument [Line Items]
Term Loan Facility						1,275
Interest rate, long-term debt					4.875%
Proceeds from Issuance of Debt			1,269
Senior unsecured notes [Member] \| 2017 Notes [Member]
Debt Instrument [Line Items]
Term Loan Facility						1,175
Interest rate, long-term debt					3.50%
Proceeds from Issuance of Debt			1,169
Senior unsecured notes [Member] \| 2010-2012 Notes [Member]
Debt Instrument [Line Items]
Use of portion of debt proceeds		3,500
Loss on extinguishment of debt		108
Icahn Enterprises Holdings [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 2	$ 126