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Schedule I - Condensed Financial Information of Parent (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Feb. 28, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  |  | 1.99% |  |
Debt | $ 7,207 |  | $ 7,207 | $ 7,096 |
Icahn Enterprises Holdings |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Affiliate ownership interest |  |  | 99.00% |  |
Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Net investment in and advances from subsidiaries |  |  | $ 629 | 264 | $ (366)
Debt | 4,847 |  | $ 4,847 | 5,309 |
Cash and cash equivalents on hand, used to discharge debt | $ 376 |  |  |  |
6.750% senior unsecured notes due 2024 | Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Repayment of senior notes |  | $ 500 |  |  |
Interest rate on debt instrument |  | 6.75% |  |  |
4.750% senior unsecured notes due 2024 | Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Debt |  |  |  | $ 1,103 |
Interest rate on debt instrument | 4.75% |  | 4.75% | 4.75% |
6.375% senior unsecured notes due 2025 | Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Debt | $ 749 |  | $ 749 | $ 749 |
Interest rate on debt instrument | 6.375% |  | 6.375% | 6.375% |
6.250% senior unsecured notes due 2026 | Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Debt | $ 1,238 |  | $ 1,238 | $ 1,250 |
Interest rate on debt instrument | 6.25% |  | 6.25% | 6.25% |
5.250% senior unsecured notes due 2027 | Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Debt | $ 1,454 |  | $ 1,454 | $ 1,460 |
Interest rate on debt instrument | 5.25% |  | 5.25% | 5.25% |
4.375% senior unsecured notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Debt | $ 698 |  | $ 698 |  |
Interest rate on debt instrument | 4.375% |  | 4.375% |  |
9.750% senior unsecured notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Debt face amount | $ 700 |  | $ 700 |  |
Interest rate on debt instrument | 9.75% |  | 9.75% | 9.75% |
Icahn Enterprises G.P. | Icahn Enterprises Holdings |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
General partner ownership percentage in Icahn Enterprises |  |  | 1.00% |  |
Icahn Enterprises G.P. | 4.375% senior unsecured notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |
Debt | $ 708 |  | $ 708 | $ 747 |

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