Debt Instrument, Repurchase Percentage of Principal Amount, excluding accrued and unpaid interest

No definition available.

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Period Type:	duration

- Definition

Line of credit facility, incremental borrowing increase

+ References

No definition available.

+ Details

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

- Definition

Line of Credit Facility, Maximum Borrowing Capacity, Letters of Credit Sublimit as a Percentage of Total Facility Commitment

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of Credit Facility, Potential Increase in Maximum Borrowing Capacity if Covenant Requirements Met

+ References

No definition available.

+ Details

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

- Definition

Redemption of debt instrument, premium written off

+ References

No definition available.

+ Details

Name:	iep_RedemptionOfDebtInstrumentPremiumWrittenOff
Namespace Prefix:	iep_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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=6584090&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
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

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

- Details

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

- Definition

The amount of debt premium that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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=6584090&loc=d3e28878-108400

+ Details

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

- 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

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

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

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

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

Debt Narrative - Debt and Credit Facilities - Energy (Details) (Energy Segment [Member], USD $)	0 Months Ended	9 Months Ended	0 Months Ended									0 Months Ended		9 Months Ended				9 Months Ended		0 Months Ended
	Oct. 23, 2012	Sep. 30, 2013 CVR Second Lien Notes [Member]	Oct. 23, 2012 2022 Notes [Member] Senior unsecured notes [Member]	Apr. 06, 2010 CVR Issuers [Member] CVR First Lien Notes [Member] Term Loan [Member]	Apr. 06, 2010 CVR Issuers [Member] CVR Second Lien Notes [Member] Term Loan [Member]	Dec. 15, 2011 CVR Issuers [Member] Additional CVR Notes [Member] Term Loan [Member]	Sep. 30, 2013 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member]	Dec. 31, 2012 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member]	Dec. 01, 2012 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member]	Dec. 01, 2012 CRLLC [Member] ABL Credit Facility [Member] Letter of Credit [Member]	Sep. 30, 2013 CRLLC [Member] Letter of Credit [Member] Revolving Credit Facility [Member]	Jun. 04, 2012 CRLLC [Member] Debt repurchase percentage of principal amount authorized if change of control [Member] CVR Notes [Member] Term Loan [Member]	May 04, 2012 CRLLC [Member] Debt repurchase percentage of principal amount authorized if change of control [Member] CVR Notes [Member] Term Loan [Member]	Sep. 30, 2013 CRLLC [Member] Debt repurchase percentage of principal amount authorized if change of control [Member] CVR Notes [Member] Term Loan [Member]	Apr. 13, 2011 CRNF [Member] Term Loan [Member]	Sep. 30, 2013 CRNF [Member] Revolving Credit Facility [Member]	Apr. 13, 2011 CRNF [Member] Revolving Credit Facility [Member]	Sep. 30, 2013 CRNF [Member] Base Rate [Member]	Sep. 30, 2013 CRNF [Member] EuroDollar [Member]	Oct. 23, 2012 Extinguishment of Debt, Type [Domain]	Oct. 23, 2012 Payment of accrued interest [Member]	Oct. 23, 2012 Payment of premium [Member]
Debt Instrument [Line Items]
Term Loan Facility			$ 500,000,000	$ 275,000,000	$ 225,000,000	$ 200,000,000									$ 125,000,000
Interest rate, long-term debt			6.50%	9.00%	10.875%	9.00%
Gain on extinguishment of debt		5,000,000
Use of portion of debt proceeds	323,000,000																			348,000,000	2,000,000	23,000,000
Gross proceeds from sale of senior unsecured notes			493,000,000
Debt Instrument, Unamortized Premium													54,000,000
Redemption of debt instrument, premium written off														25,000,000
Redemption percentage of principal amount												101.00%	101.00%
Line of credit facility																	25,000,000
Senior credit facility, maximum borrowing availability							373,000,000		400,000,000
Line of credit facility, incremental borrowing increase									200,000,000
Letters of credit sublimit as a percentage of total facility commitment										10.00%
Line of credit facility, potential increase in maximum borrowing capacity if covenant requirements met																	50,000,000
Line of credit facility, outstanding borowings							$ 27,000,000	$ 0			$ 0					$ 0
Percentage spread on debt																		2.50%	3.50%