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Description of Business and Basis of Presentation (Details) (USD $) |  |  |  |  | 6 Months Ended | 12 Months Ended | 6 Months Ended |  | 6 Months Ended | 2 Months Ended | 6 Months Ended
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Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2012 Restricted cash [Member] | Dec. 31, 2011 Restricted cash [Member] | Jun. 30, 2012 Principal Owners and Affiliates [Member] | Dec. 31, 2011 Principal Owners and Affiliates [Member] | Jun. 30, 2012 Icahn Enterprises G.P. [Member] | Jun. 30, 2012 Icahn Enterprises Holdings [Member] | Dec. 31, 2011 Icahn Enterprises Holdings [Member] | Jun. 30, 2012 Icahn Enterprises G.P. [Member] | Jun. 30, 2012 Energy Segment [Member] | Jun. 30, 2012 Nitrogen Fertilizer [Member] Energy Segment [Member] | Jun. 30, 2012 Minimum [Member] Refineries [Member] Energy Segment [Member] | Jun. 30, 2012 Maximum [Member] Refineries [Member] Energy Segment [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 operating subsidiary |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  |  |  |  |  |  | 1.99% |  |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises (in units) |  |  |  |  | 93,309,237 |  |  |  |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  |  |  | 93.00% | 92.60% |  |  |  |  |  |  |  |
Carrying value of long-term debt | $ 8,205,000,000 | $ 6,473,000,000 |  |  |  |  |  | $ 3,770,000,000 | $ 3,056,000,000 |  | $ 907,000,000 |  |  |
Fair value of long-term debt | 8,400,000,000 | 6,500,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Cash held at consolidated affiliated partnerships and restricted cash | 1,372,000,000 | 4,979,000,000 | 1,000,000,000 | 4,800,000,000 |  |  |  | 2,000,000 | 16,000,000 |  | 0 |  |  |
Planned major maintenance |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |
Planned major maintenance (in years) |  |  |  |  |  |  |  |  |  |  |  | 2 years | 4 years | 5 years

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