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v3.19.1

(Details) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jan. 29, 2019 | Jan. 31, 2018 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 05, 2018
Description of Business [Line Items] |  |  |  |  |  |
Payments to acquire additional interest in subsidiaries |  |  | $ 241 | $ 0 |  |
Icahn Enterprises Holdings |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 99.00% |  |  |
Payments to acquire additional interest in subsidiaries |  |  | $ 241 | 0 |  |
Investment Funds |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
Fair value of interest in subsidiary |  |  | $ 4,800 |  | $ 5,100 |
CVR Refining |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 3.90% |  |  |
CVR Energy |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 70.80% |  |  |
Ferrous Resources |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 77.20% |  |  |
Aggregate consideration for business to be disposed of |  |  |  |  |  | $ 550
Icahn Enterprises G.P. |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  | 1.00% |  |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  |  | 1.99% |  |  |
Icahn Enterprises G.P. | Icahn Enterprises Holdings |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  | 1.00% |  |  |
Mr. Icahn and affiliates |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
Affiliate ownership interest in Icahn Enterprises |  |  | 91.70% |  |  |
Energy Segment | CVR Refining |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 80.60% |  |  |
Payments to acquire additional interest in subsidiaries | $ 241 |  |  |  |  |
Railcar Segment | ARL [Member] |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
(Loss) gain on disposition of assets, net |  |  |  | $ 4 |  |
aggregate consideration for business disposed of |  |  |  |  | $ 15 |
Food Packaging Segment | Viskase |  |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  | 78.60% | 74.60% |  |
Contribution to subsidiary |  | $ 44 |  |  |  |
Proceeds from subsidiary rights offering |  | $ 50 |  |  |  |

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