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Net Income Per LP Unit (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended | 9 Months Ended | 0 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 25, 2014 Depositary units [Member] | Jun. 30, 2014 Depositary units [Member] | Apr. 22, 2014 Depositary units [Member] | Feb. 25, 2014 Depositary units [Member] | Sep. 30, 2014 Icahn Enterprises G.P. [Member] | Sep. 30, 2014 Principal Owners and Affiliates [Member] | Jul. 31, 2014 Limited partners Depositary units [Member] | May 05, 2014 Limited partners Depositary units [Member] | Feb. 28, 2013 Limited partners Depositary units [Member] | Sep. 30, 2014 Limited partners Depositary units [Member] | Sep. 30, 2014 General partner | Nov. 03, 2014 Partnership Interest [Member] Principal Owners and Affiliates [Member]
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income attributable to Icahn Enterprises | $ (355) | $ 472 | $ 105 | $ 803 |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation) | (348) | 463 | 103 | 787 |  |  |  |  |  |  |  |  |  |  |  |
Basic (loss) income per LP unit | $ (2.90) | $ 4.13 | $ 0.87 | $ 7.22 |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average LP units outstanding | 120,000,000 | 112,000,000 | 118,000,000 | 109,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |
Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Dilutive effect of unit distribution declared (income) |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Dilutive effect of unit distribution declared (units) |  | 1,000,000 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Diluted (loss) income per LP unit | $ (2.90) | $ 4.10 | $ 0.87 | $ 7.17 |  |  |  |  |  |  |  |  |  |  |  |
Diluted weighted average LP units outstanding | 120,000,000 | 113,000,000 | 118,000,000 | 110,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Units issues in connection with equity offering (ones) |  |  |  |  |  |  |  |  |  |  |  |  | 3,174,604 |  |  |
Equity offering per share amount (ones) |  |  |  |  |  |  |  |  |  |  |  |  | $ 63.00 |  |  |
Underwriter option to purchase additional depositary units |  |  |  |  |  |  |  |  |  |  |  |  | 476,191 |  |  |
Proceeds from equity offering |  |  | 188 | 1,308 |  |  |  |  |  |  |  |  |  | 194 |  |
Proceeds from equity offerings |  |  | $ 0 | $ 317 |  |  |  |  |  |  |  |  |  |  | $ 4 |
General partner ownership percentage in Icahn Enterprises |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |
Distribution declared per depositary unit |  |  |  |  |  |  |  | $ 1.50 |  |  | $ 1.50 | $ 1.50 |  |  |  |
Distribution Made to Limited Partner, Unit Distribution |  |  |  |  | 1,446,074 | 1,555,003 | 1,574,448 |  |  |  |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  |  |  |  |  |  |  |  | 88.30% |  |  |  |  |  | 88.30%

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