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Description of Business (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 07, 2021 | Dec. 31, 2022 USD ($) shares | Oct. 31, 2020 USD ($) shares | Dec. 31, 2021 USD ($) | Dec. 31, 2022 USD ($) segment item
Description of Business [Line Items] |  |  |  |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  |  |  |  | 1.99%
Purchase of additional interests in consolidated subsidiaries |  |  |  |  | $ (1)
Number of Operating Segments | segment |  |  |  |  | 2
Disposal Group Not Discontinued Operation Gain Loss On Disposal Statement Of Income Extensible List Not Disclosed Flag |  |  |  | true |
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | PSC Metals |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of interest sold | 100.00% |  |  |  |
Proceeds from sale of equity interests |  |  |  | $ 163 |
Pretax gain on disposition of assets |  |  |  | $ 323 |
Icahn Enterprises Holdings |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  | 99.00%
Affiliate ownership interest |  |  |  |  | 99.00%
Icahn Enterprises Holdings | Icahn Enterprises G.P. |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  |  |  | 1.00%
Icahn Enterprises Holdings | Mr. Icahn and affiliates |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Affiliate ownership interest |  |  |  |  | 85.00%
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%
Affiliate ownership interest |  |  |  |  | 98.01%
CVR Refining |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  | 37.00%
CVR Energy | Energy Segment |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  | 71.00%
Viskase |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Common stock shares acquired | shares |  | 1,123,363 |  |  |
Amount of common stock shares acquired |  | $ 1 |  |  |
Viskase | Private Placement |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Percentage of equity ownership in operating subsidiary |  |  |  |  | 90.00%
Common stock shares acquired | shares |  |  | 50,000,000 |  |
Amount of common stock shares acquired |  |  | $ 100 |  |
Investment Funds |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Fair value of investment in subsidiary |  | 4,200 |  |  | $ 4,200
Vivus | Pharma Segment |  |  |  |  |
Description of Business [Line Items] |  |  |  |  |
Number Of Approved Therapies | item |  |  |  |  | 2
Number Of Product Candidate In Active Clinical Development | item |  |  |  |  | 1
Fair value of debt securities |  | 183 |  |  | $ 183
Consideration Including Exit policy |  | 81 |  |  | 81
Contingent Liability |  | $ 3 |  |  | 3
Repayments of Debt |  |  |  |  | $ 63

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