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Schedule I - Condensed Financial Information of Parent (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  | 1.99% |  |
Debt |  | $ 7,692 | $ 8,059 |
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 |  | $ (366) | 1,276 | $ (363)
Debt |  | $ 5,810 | 5,811 |
5.875% senior unsecured notes due 2022 | Icahn Enterprises (Parent) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Debt |  |  | $ 1,209 |
Interest rate on debt instrument |  | 6.25% | 6.25% |
6.750% senior unsecured notes due 2024 | Icahn Enterprises (Parent) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Debt |  | $ 499 | $ 499 |
Interest rate on debt instrument |  | 6.75% | 6.75% |
6.750% senior unsecured notes due 2024 | Icahn Enterprises (Parent) | Subsequent event |  |  |  |
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 |  | $ 1,105 | $ 1,106 |
Interest rate on debt instrument |  | 4.75% | 4.75% |
6.375% senior unsecured notes due 2025 | Icahn Enterprises (Parent) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Debt |  | $ 748 | $ 748 |
Interest rate on debt instrument |  | 6.375% | 6.375% |
6.250% senior unsecured notes due 2026 | Icahn Enterprises (Parent) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Debt |  | $ 1,250 | $ 1,250 |
Interest rate on debt instrument |  | 6.25% | 6.25% |
5.250% senior unsecured notes due 2027 | Icahn Enterprises (Parent) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Debt |  | $ 1,461 | $ 999 |
Interest rate on debt instrument |  | 5.25% | 5.25% |
4.375% senior unsecured note due 2029 | Icahn Enterprises (Parent) |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Debt |  | $ 747 |  |
Interest rate on debt instrument |  | 4.375% | 4.375% |
Icahn Enterprises G.P. | Icahn Enterprises Holdings |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
General partner ownership percentage in Icahn Enterprises |  | 1.00% |  |

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