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Net Income Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions |  |  |  |  |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 15, 2017 | Aug. 02, 2017 | Jun. 13, 2017 | May 03, 2017 | Apr. 18, 2017 | Feb. 27, 2017 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to Icahn Enterprises |  |  |  |  |  |  | $ 597 | $ (16) | $ 2,132 | $ (922)
Net income (loss) attributable to Icahn Enterprises allocable to limited partners (98.01% allocation) |  |  |  |  |  |  | $ 586 | $ (16) | $ 2,090 | $ (904)
Basic income (loss) per LP unit |  |  |  |  |  |  | $ 3.53 | $ (0.12) | $ 13.23 | $ (6.70)
Basic weighted average LP units outstanding |  |  |  |  |  |  | 166,000,000 | 139,000,000 | 158,000,000 | 135,000,000
Diluted income (loss) per LP unit |  |  |  |  |  |  | $ 3.53 | $ (0.12) | $ 13.23 | $ (6.70)
Diluted weighted average LP units outstanding |  |  |  |  |  |  | 166,000,000 | 139,000,000 | 158,000,000 | 135,000,000
Units issued in connection with rights offering (number of units) |  |  |  |  |  |  |  |  | 11,171,104 |
Units issued in connection with rights offering (value) |  |  |  |  |  |  |  |  | $ 600 |
Distribution declared per LP unit |  | $ 1.50 |  | $ 1.50 |  | $ 1.50 |  |  |  |
Units distributed to LP unitholders | 4,272,982 |  | 4,556,977 |  | 4,335,685 |  |  |  |  |
Restricted units vested during period (number of units) |  |  |  |  |  |  | 2,388 |  | 5,418 |
Mr. Icahn and affiliates |  |  |  |  |  |  |  |  |  |
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |  |
Units issued in connection with rights offering (number of units) |  |  |  |  |  |  |  |  | 10,525,105 |

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