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(Details) (USD $) |  |  | 3 Months Ended | 0 Months Ended | 3 Months Ended |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2013 Icahn Enterprises G.P. [Member] | May 02, 2013 Principal Owners and Affiliates [Member] | Mar. 31, 2013 Principal Owners and Affiliates [Member] | Mar. 31, 2013 Restricted cash [Member] | Dec. 31, 2012 Restricted cash [Member] | Mar. 31, 2013 Icahn Enterprises G.P. [Member] | Mar. 31, 2013 Icahn Enterprises Holdings [Member] | Dec. 31, 2012 Icahn Enterprises Holdings [Member]
Entity Information [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  |  |  |  |  | 99.00% |
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% |  |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises (in units) |  |  |  |  | 97,764,251 |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  |  | 90.60% | 90.50% |  |  |  |  |
Debt | $ 8,184,000,000 | $ 8,548,000,000 |  |  |  |  |  |  | $ 8,176,000,000 | $ 8,540,000,000
Fair value of long-term debt | 8,300,000,000 | 8,600,000,000 |  |  |  |  |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | $ 1,424,000,000 | $ 1,419,000,000 |  |  |  | $ 1,300,000,000 | $ 700,000,000 |  | $ 1,424,000,000 | $ 1,419,000,000

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