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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Nov. 28, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Starfire Holding Corporation |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Ownership percentage by principal owner |  | 99.60% |  |
Pension funding indemnity agreement with subsidiary |  | $ 250.0 |  |
ACF |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Funded status of related party pension plan |  | $ 32.0 |  |
Icahn Enterprises Holdings |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Affiliate ownership interest |  | 99.00% |  |
Icahn Enterprises Holdings | Viskase And ACF Industries LLC [Member] | Minimum |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Ownership percentage by principal owner |  | 80.00% |  |
Mr. Icahn and affiliates | Minimum |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Affiliate ownership interest |  | 80.00% |  |
Mr. Icahn and affiliates | Icahn Enterprises G.P. |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Affiliate ownership in parent company general partner |  | 100.00% |  |
Mr. Icahn and affiliates | Icahn Enterprises Holdings |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Affiliate ownership interest |  | 85.00% |  |
Energy Segment |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental loss contingency accrual |  | $ 22.0 | $ 12.0 |
Amount of quantifying alleged damages |  | 6.8 |  |
Price of RINs |  | 435.0 | 435.0 | $ 190.0
RFS position |  | 692.0 | 494.0 |
Insurance policies coverage limits | $ 50.0 |  |  |
Energy Segment | Call option lawsuits |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Litigation settlement paid |  | 79.0 |  |
Accrued expenses and other liabilities |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental loss contingency accrual |  | $ 22.0 | $ 13.0 |

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