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Net Income Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 09, 2013 | Jun. 12, 2013 | Feb. 28, 2013 | Dec. 31, 2015 | [1] | Sep. 30, 2015 | [1] | Jun. 30, 2015 | [1] | Mar. 31, 2015 | [1] | Dec. 31, 2014 | [1] | Sep. 30, 2014 | [1] | Jun. 30, 2014 | [1] | Mar. 31, 2014 | [1] | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net (loss) income attributable to Icahn Enterprises |  |  |  |  |  |  |  |  |  |  |  | $ (1,194) | $ (373) | $ 1,025
Limited partners |  |  |  |  |  |  |  |  |  |  |  | $ (1,170) | $ (366) | $ 1,005
Basic (loss) income per LP unit |  |  |  | $ (8.56) | $ (3.40) | $ 1.68 | $ 1.28 | $ (3.84) | $ (2.90) | $ 4.06 | $ (0.24) | $ (9.29) | $ (3.08) | $ 9.14
Basic weighted average LP units outstanding |  |  |  |  |  |  |  |  |  |  |  | 126,000,000 | 119,000,000 | 110,000,000
Dilutive securities, effect on earnings per unit from converison of debt securities |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2
Dilutive effect of variable rate convertible notes, Units |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000
Diluted (loss) income per LP unit |  |  |  | $ (8.56) | $ (3.40) | $ 1.68 | $ 1.27 | $ (3.84) | $ (2.90) | $ 4.06 | $ (0.24) | $ (9.29) | $ (3.08) | $ 9.07
Diluted weighted average LP units outstanding |  |  |  |  |  |  |  |  |  |  |  | 126,000,000 | 119,000,000 | 111,000,000
Partnership contributions |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 593
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unit distribution declared per share |  |  |  |  |  |  |  |  |  |  |  |  | $ 6.00 |
Units distributed to LP unitholders |  |  |  |  |  |  |  |  |  |  |  | 8,337,645 |  |
Icahn Enterprises G.P. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  | 1.00%
Principal Owners and Affiliates [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  |  |  |  |  |  |  |  |  |  | 89.00% |  |
Limited partners | Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Newly issued depositary units | 2,000,000 | 1,600,000 | 3,174,604 |  |  |  |  |  |  |  |  |  |  |
Equity issuance, per unit amount | $ 135.00 | $ 75.54 | $ 63.00 |  |  |  |  |  |  |  |  |  |  |
Underwriter option to purchase additional depositary units | 300,000 | 240,000 | 476,191 |  |  |  |  |  |  |  |  |  |  |
Proceeds from Issuance or Sale of Equity |  |  |  |  |  |  |  |  |  |  |  |  | $ 581 |
General partner |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Partnership contributions |  |  |  |  |  |  |  |  |  |  |  |  | $ 12 |
[1] | 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.

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