Additional Indebtedness Allowed Per Debt Covenants

No definition available.

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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

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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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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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- 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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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

- 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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Period Type:	duration

- Details

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Debt Narrative - Senior Unsecured Notes - Icahn Enterprises and Icahn Enterprises Holdings (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 29, 2014	Jan. 15, 2010	Jan. 24, 2014	Nov. 12, 2010	Jan. 21, 2014	Aug. 01, 2013	Jul. 02, 2012
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ (162)	$ 0	$ (10)
Icahn Enterprises Holdings [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt	(162)	0	(10)
Holding Company [Member]
Debt Instrument [Line Items]
Additional indebtedness allowed per debt covenants	930
Holding Company [Member] \| 5.875% senior unsecured notes due 2022 - Icahn Enterprises/Icahn Enterprises Holdings
Debt Instrument [Line Items]
Term Loan Facility				1,350
Proceeds from Issuance of Debt				1,340
Holding Company [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
Holding Company [Member] \| 6% senior unsecured notes due 2020 - Icahn Enterprises/Icahn Enterprises Holdings
Debt Instrument [Line Items]
Term Loan Facility									500
Interest rate, long-term debt					6.00%
Proceeds from Issuance of Debt				493
Holding Company [Member] \| Initial Notes [Member]
Debt Instrument [Line Items]
Gross proceeds from sale of senior unsecured notes					1,987
Holding Company [Member] \| 2016 Additional Notes [Member]
Debt Instrument [Line Items]
Term Loan Facility							200
Holding Company [Member] \| 7.75% senior unsecured notes due 2016 [Member]
Debt Instrument [Line Items]
Term Loan Facility					850
Interest rate, long-term debt					7.75%
Holding Company [Member] \| 8% senior unsecured notes due 2018 [Member]
Debt Instrument [Line Items]
Term Loan Facility					1,150
Interest rate, long-term debt					8.00%
Holding Company [Member] \| 2012 Additional Notes [Member]
Debt Instrument [Line Items]
Term Loan Facility										1,000
Holding Company [Member] \| 4.875% senior unsecured notes due 2019 - Icahn Enterprises/Icahn Enterprises Holdings
Debt Instrument [Line Items]
Term Loan Facility								1,275
Interest rate, long-term debt					4.875%
Proceeds from Issuance of Debt				1,269
Holding Company [Member] \| 3.50% senior unsecured notes due 2017 - Icahn Enterprises/Icahn Enterprises Holdings
Debt Instrument [Line Items]
Term Loan Facility								1,175
Interest rate, long-term debt					3.50%
Proceeds from Issuance of Debt				1,169
Holding Company [Member] \| 2010-2012 Notes [Member]
Debt Instrument [Line Items]
Use of portion of debt proceeds						3,500
Loss on extinguishment of debt	108
Senior unsecured notes [Member] \| 2018 Additional Notes [Member]
Debt Instrument [Line Items]
Term Loan Facility							300
Senior unsecured notes [Member] \| 2010 Additional Notes [Member]
Debt Instrument [Line Items]
Gross proceeds from sale of senior unsecured notes							$ 512