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Commitments and Contingencies - Narrative (Details) |  | 12 Months Ended |
--- | --- | --- | ---
Aug. 19, 2024 USD ($) | Dec. 31, 2024 USD ($) lawsuit | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Jan. 31, 2023 USD ($)
Commitments and Contingencies |  |  |  |  |
Environmental loss contingency accrual |  | $ 3,000,000 | $ 19,000,000 |  |
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] |  | Accrued Liabilities | Accrued Liabilities |  |
Minimum Carbon Dioxide Supply |  |  |  |  | $ 15,000,000
Maximum fee payable |  |  |  |  | $ 45,000,000
Civil penalty | $ 1,500,000 |  |  |  |
Energy |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Expense (benefit) |  | $ 46,000,000 | $ 114,000,000 | $ 435,000,000 |
RFS position |  | 323,000,000 | $ 329,000,000 |  |
Insurance policies coverage limits |  | $ 50,000,000 |  |  |
Icahn Enterprises Holdings |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Affiliate ownership interest |  | 99.00% |  |  |
Icahn Enterprises G.P. | Mr. Icahn and affiliates |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Affiliate ownership in parent company general partner |  | 100.00% |  |  |
Icahn Enterprises Holdings | Mr. Icahn and affiliates |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Affiliate ownership interest |  | 86.00% |  |  |
Minimum | Mr. Icahn and affiliates |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Affiliate ownership interest |  | 80.00% |  |  |
Starfire Holding Corporation |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Ownership percentage by principal owner |  | 99.60% |  |  |
Pension funding indemnity agreement with subsidiary |  | $ 250,000,000 |  |  |
ACF |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Funded status of related party pension plan |  | $ 21,000,000 |  |  |
ACF | Minimum | Icahn Enterprises Holdings |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Ownership percentage by principal owner |  | 80.00% |  |  |
General partner | Carl C. Icahn |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Civil penalty | $ 500,000 |  |  |  |
Call option lawsuits | Energy |  |  |  |  |
Commitments and Contingencies |  |  |  |  |
Lawsuits relating to settlement | lawsuit |  | 2 |  |  |

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