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Commitments and Contingencies - Narrative (Details) $ in Millions |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 22, 2021 USD ($) | Jun. 25, 2021 item | Jan. 27, 2021 USD ($) lawsuit | Dec. 31, 2020 USD ($) item | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Energy Segment |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Environmental loss contingency accrual |  |  |  | $ 11 | $ 12 | $ 11 |
Number of alleged violations count | item |  |  |  | 9 |  |  |
Number of additional alleged violations count | item |  |  |  | 8 |  |  |
Price of RINs |  |  |  |  | 435 | 190 | $ 43
Biofuel blending obligation |  |  |  | $ 214 | $ 494 | 214 |
Amount of quantifying alleged damages in excess | $ 300 |  |  |  |  |  |
Insurance policies coverage limits |  |  | $ 50 |  |  |  |
Number of lawsuits relating to insurance coverage | lawsuit |  |  | 2 |  |  |  |
Number of lawsuits relating to indemnity of insurance policies with threshold coverage | lawsuit |  |  | 1 |  |  |  |
Number of small refinery exemptions vacated by court | item |  | 3 |  |  |  |  |
Starfire Holding Corporation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Ownership percentage by principal owner |  |  |  |  | 99.60% |  |
Pension funding indemnity agreement with subsidiary |  |  |  |  | $ 250 |  |
ACF |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Funded status of related party pension plan |  |  |  |  | 66 |  |
Accrued expenses and other liabilities |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Environmental loss contingency accrual |  |  |  | $ 37 | $ 13 | $ 37 |
Icahn Enterprises Holdings |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Affiliate ownership interest |  |  |  |  | 99.00% |  |
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 |  |  |  |  | 88.00% |  |

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