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Net Income Per LP Unit (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 0 Months Ended |  | 0 Months Ended | 3 Months Ended | 0 Months Ended
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Apr. 16, 2013 Depositary units [Member] | Feb. 11, 2013 Depositary units [Member] | Mar. 31, 2013 Depositary units [Member] | May 02, 2013 Principal Owners and Affiliates [Member] | Mar. 31, 2013 Principal Owners and Affiliates [Member] | Feb. 28, 2013 Limited partners Depositary units [Member] | Feb. 28, 2013 General partner
Earnings Per LP Unit [Line Items] |  |  |  |  |  |  |  |  |
Net income attributable to Icahn Enterprises | $ 277 | $ 49 |  |  |  |  |  |  |
Net income attributable to Icahn Enterprises allocable to limited partners (98.01% allocation) | 271 | 48 |  |  |  |  |  |  |
Basic income per LP unit | 2.56 | 0.48 |  |  |  |  |  |  |
Basic weighted average LP units outstanding | 106,000,000 | 99,000,000 |  |  |  |  |  |  |
Dilutive effect of variable rate convertible notes (income) | 2 |  |  |  |  |  |  |  |
Dilutive effect of variable rate convertible notes (units) | 2,000,000 |  |  |  |  |  |  |  |
Dilutive effect of unit distribution declared (income) | 0 |  |  |  |  |  |  |  |
Dilutive effect of unit distribution declared (units) | 1,000,000 |  |  |  |  |  |  |  |
Diluted income per LP unit | 2.50 | 0.48 |  |  |  |  |  |  |
Diluted weighted average LP units outstanding | 109,000,000 | 99,000,000 |  |  |  |  |  |  |
Amount of antidilutive securities excluded from computation of earnings per share |  | 5,000,000 |  |  |  |  |  |  |
Units issues in connection with equity offering (ones) |  |  |  |  |  |  |  | 3,174,604 |
Equity offering per share amount (ones) |  |  |  |  |  |  |  | $ 63.00 |
Proceeds from equity offering | 556 | 0 |  |  |  |  |  | 194 |
Proceeds from equity offerings | 198 | 510 |  |  |  |  |  |  | 4
Underwriter option to purchase additional depositary units |  |  |  |  |  |  |  | 476,191 |
Distribution declared per depositary unit |  |  |  | $ 1.00 |  |  |  |  |
Units distributed as part of quartelry distribution |  |  | 1,521,946 |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  |  |  |  | 90.60% | 90.50% |  |
Distribution payable |  |  |  |  | $ 105 |  |  |  |

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