(Details) (USD $)	3 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Entity Information [Line Items]
Debt	$ 12,088,000,000us-gaap_DebtAndCapitalLeaseObligations	$ 11,588,000,000us-gaap_DebtAndCapitalLeaseObligations
Fair value of long-term debt	12,300,000,000us-gaap_LongTermDebtFairValue	11,600,000,000us-gaap_LongTermDebtFairValue
Cash held at consolidated affiliated partnerships and restricted cash	2,005,000,000	1,435,000,000
Restricted cash [Member]
Entity Information [Line Items]
Cash held at consolidated affiliated partnerships and restricted cash	2,000,000,000	1,300,000,000
Icahn Enterprises G.P. [Member]
Entity Information [Line Items]
General partner ownership percentage in Icahn Enterprises	1.00%
General partner ownership interest in Icahn Enterprises Holdings	1.00%
Aggregate general partner ownership interest of parent and operating subsidiary	1.99%
Mr. Icahn and his affiliates [Member]
Entity Information [Line Items]
Affiliate ownership interest in Icahn Enterprises (in units)	108,810,845
Affiliate ownership interest in Icahn Enterprises	88.40%
Icahn Enterprises Holdings [Member]
Entity Information [Line Items]
Percentage of equity ownership in operating subsidiary	99.00%
Debt	12,088,000,000	11,588,000,000
Cash held at consolidated affiliated partnerships and restricted cash	$ 2,005,000,000	$ 1,435,000,000

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Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Aggregate Ownership interest of Parent and Holding Company Subsidiaries

+ References

No definition available.

+ Details

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- Definition

Limited Liability Company (LLC) or Limited Partnership (LP), Members or Limited Partners, Ownership Interest, Units

+ References

No definition available.

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- Definition

Subsidiary of Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest

+ References

No definition available.

+ Details

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- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

Reference 1: 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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.13,16)

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

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

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- Definition

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-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 210.5-02.1)

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

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- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

No definition available.

+ Details

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