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

No definition available.

Name:	iep_DebtInstrumentRepurchasePercentageOfPrincipalAmount
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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

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=34725769&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

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Balance Type:	na
Period Type:	instant

- Details

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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

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Balance Type:	credit
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
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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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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Balance Type:	debit
Period Type:	duration

Debt Narrative - Debt and Credit Facilities - Energy (Details) (USD $)	9 Months Ended				0 Months Ended	12 Months Ended									9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 CVR Second Lien Notes [Member] Energy Segment [Member]	Jan. 29, 2014 2022 Notes [Member] Senior unsecured notes [Member]	Oct. 23, 2012 2022 Notes [Member] Energy Segment [Member] Senior unsecured notes [Member]	Dec. 31, 2013 Debt repurchase percentage of principal amount authorized if change of control [Member] 2022 Notes [Member] Senior unsecured notes [Member]	Sep. 30, 2014 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member] Energy Segment [Member]	Dec. 31, 2013 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member] Energy Segment [Member]	Dec. 01, 2012 CRLLC [Member] ABL Credit Facility [Member] Revolving Credit Facility [Member] Energy Segment [Member]	Dec. 01, 2012 CRLLC [Member] ABL Credit Facility [Member] Letter of Credit [Member] Energy Segment [Member]	Sep. 30, 2014 CRLLC [Member] Letter of Credit [Member] Revolving Credit Facility [Member] Energy Segment [Member]	Apr. 13, 2011 CRNF [Member] Term Loan [Member] Energy Segment [Member]	Sep. 30, 2014 CRNF [Member] Revolving Credit Facility [Member] Energy Segment [Member]	Apr. 13, 2011 CRNF [Member] Revolving Credit Facility [Member] Energy Segment [Member]	Sep. 30, 2014 CRNF [Member] Base Rate [Member] Energy Segment [Member]	Sep. 30, 2014 CRNF [Member] EuroDollar [Member] Energy Segment [Member]
Debt Instrument [Line Items]
Term Loan Facility				$ 1,350,000,000	$ 500,000,000							$ 125,000,000
Interest rate, long-term debt					6.50%
Gain on extinguishment of debt	(162,000,000)	5,000,000	5,000,000
Gross proceeds from sale of senior unsecured notes					493,000,000
Redemption percentage of principal amount						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%