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Net Income Per LP Unit (Details) (USD $) In Millions, except Share data, unless otherwise specified | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 1 Months Ended | 12 Months Ended |  | 1 Months Ended | 0 Months Ended
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Jan. 20, 2012 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Nov. 30, 2012 Depositary Units [Member] | Aug. 31, 2012 Depositary Units [Member] | Jul. 31, 2012 Depositary Units [Member] | May 31, 2012 Depositary Units [Member] | Apr. 30, 2012 Depositary Units [Member] | Mar. 30, 2012 Depositary Units [Member] | Feb. 28, 2012 Depositary Units [Member] | Dec. 01, 2011 Depositary Units [Member] | Jan. 20, 2012 Depositary Units [Member] | Dec. 31, 2011 Depositary Units [Member] | Dec. 31, 2010 Depositary Units [Member] | Dec. 27, 2011 Depositary Units [Member] | Jan. 20, 2012 Principal Owners and Affiliates [Member] Depositary Units [Member] | Nov. 02, 2012 Dividend Declared [Member] Depositary Units [Member]
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) from continuing operations attributable to Icahn Enterprises |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 396 |  | $ 750 | $ 200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to parent, allocated to general partner before traditional parntership allocation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (9) | [1] | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to parent, subject to allocation amongst partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 387 |  | 750 | 200 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Limited partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 379 |  | 735 | 195 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 196 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income from discontinued operations attributable to Icahn Enterprises allocable to limited partners |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 | (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic income (loss) per LP unit, continuing operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.75 |  | 8.35 | 2.28 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic income (loss) per LP unit, discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00 |  | 0.00 | (0.01) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic income (loss) per LP unit |  | 0.06 | [2],[3],[4],[5] | 0.73 | [2],[3],[4],[5] | 2.44 | [2],[3],[4],[5] | 0.47 | [2],[3],[4],[5] | 2.90 | [2],[3],[4],[5] | (0.43) | [2],[3],[4],[5] | 3.22 | [2],[3],[4],[5] | 2.67 | [2],[3],[4],[5] | 3.75 |  | 8.35 | 2.27 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average LP units outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 101,000,000 |  | 88,000,000 | 86,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dilutive securities, effect on earnings per unit from converison of debt securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dilutive effect of variable rate convertible notes, Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dilutive effect of variable rate convertible notes, Income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dilutive effect of preferred stock conversion, Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted income (loss) per LP unit, continuing operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.75 |  | 8.15 | 2.27 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted income (loss) per LP unit, discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.00 |  | 0.00 | (0.01) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted income (loss) per LP unit |  | 0.06 | [2],[3],[4],[5] | 0.73 | [2],[3],[4],[5] | 2.37 | [2],[3],[4],[5] | 0.47 | [2],[3],[4],[5] | 2.81 | [2],[3],[4],[5] | (0.43) | [2],[3],[4],[5] | 3.12 | [2],[3],[4],[5] | 2.59 | [2],[3],[4],[5] | 3.75 |  | 8.15 | 2.26 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted weighted average LP units outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 101,000,000 |  | 93,000,000 | 87,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Antidilutive securities excluded from computation of earnings per unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000,000 |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution made to limited partner depositary unitholders, cash and depositary unit distributions declared, per unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.35 |  | $ 0.35 |  | $ 0.35 |  |  |  |  |  |  | $ 0.35
Distribution made to limited partner depositary unitholders, cash distributions declared, per unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.10 |  | $ 0.10 |  | $ 0.10 |  |  |  |  |  |  | $ 0.10
Distribution made to limited partner depositary unitholders, depositary unit distributions declared, per unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.25 |  | $ 0.25 |  | $ 0.25 |  |  |  |  |  |  | $ 0.25
Ratio of unit distributed per depositary unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.006277 |  | 0.005357 |  | 0.006269 |  |  |  |  |  |  | 0.005978
Units issued as a unit distribution |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 621,064 | 627,651 |  | 532,190 |  | 619,585 |  |  |  |  |  |  |  |
Impact of unit distributions on prior years' income per LP unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.20 | $ 0.05 |  |  |
Impact of Unit Distributions on Restatement of Earnings Per Share, Diluted |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.18 | $ 0.06 |  |  |
Intended proceeds from rights offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500 |  |  |  |  |  |
Rights received per depositary unit held |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.15881 |  |
Rights' subscription price per depositary unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 36.7933 |  |
Aggregate depositary units distributed in connection with rights offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,590,238 |  |  |  | 12,995,584 |
Proceeds from rights offering |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 500 |  |  |  |  |
Cancellation of treasury units (in units) | 1,137,200 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Amount represents net income allocable to the general partner for the period May 5, 2012 through August 23, 2012, the period in which Mr. Icahn and his affiliates' ownership in IEP Energy, other than Icahn Enterprises' ownership, were considered under common control. On August 24, 2012, Mr. Icahn and his affiliates contributed this interest to us in exchange for our depositary units. See Note 5, "Related Party Transactions-Energy," for further discussion regarding this transaction.
[2] | As a result of unit distributions made on March 30, 2012, May 31, 2012, August 31, 2012 and November 30, 2012, basic and diluted income (loss) per LP unit presented above reflects a restatement of the respective amounts previously reported on each of Icahn Enterprises' Form 10-Q's filed in 2012 to the extent such unit distributions occurred subsequent to the period of the report covered by each respective Form 10-Q.
[3] | Basic and diluted income (loss) per LP unit is computed separately for each quarter and therefore, the sum of such quarterly per LP unit amounts may differ from the total for the year.
[4] | We consolidated the results of CVR effective May 5, 2012.
[5] | Our second quarter 2012 results were restated due to (i) a purchase price allocation adjustment of $23 million related to an inventory step-up made during the fourth quarter 2012 related to the CVR acquisition and the common control impact of Mr. Icahn's transfer of his interest in IEP Energy to us made in the third quarter of 2012 and (ii) an adjustment of $21 million for a derivative related to a certain investment held by the Holding Company.

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