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Debt Narrative - Debt Facilities - Automotive (Details) (Automotive Segment [Member], USD $)	3 Months Ended	12 Months Ended				3 Months Ended
	Mar. 31, 2014 Tranche C Loan [Member]	Dec. 31, 2013 Revolving Credit Facility [Member] Debt Facility [Member]	Dec. 06, 2013 Revolving Credit Facility [Member] Debt Facility [Member]	Mar. 31, 2014 Letter of Credit [Member] Debt Facility [Member]	Dec. 31, 2013 Letter of Credit [Member] Debt Facility [Member]	Mar. 31, 2014 Term Loan [Member] Debt Facility [Member]
Debt Instrument [Line Items]
Term of Interest Rate Derivatives						5 years
Revolving credit facility, unused borrowing availability		$ 550,000,000	$ 540,000,000
Line of credit, aggregate principal amount due upon acceleration		300,000,000
Amount deposited in term letter of credit account under credit facility	50,000,000
Letters of credit outstanding				$ 38,000,000	$ 39,000,000

X

- Definition

Amount deposited in term letter of credit account under credit facility

+ References

No definition available.

+ Details

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Namespace Prefix:	iep_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Line of credit, aggregate principal amount due upon acceleration

+ References

No definition available.

+ Details

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

X

- Definition

Term of Interest Rate Derivatives

+ References

No definition available.

+ Details

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Namespace Prefix:	iep_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

X

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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