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Schedule I - Condensed Financial Information of Parent (Details) - USD ($) $ in Millions |  | 1 Months Ended | 2 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 16, 2024 | Dec. 31, 2024 | Apr. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Nov. 30, 2024 | Aug. 31, 2024 | Jul. 13, 2024 | May 31, 2024
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Aggregate general partner ownership interest of parent and operating subsidiary |  |  |  |  |  | 1.99% |  |  |  |  |  |
Debt |  | $ 6,809 |  | $ 7,207 | $ 7,207 | $ 6,809 | $ 7,207 |  |  |  |  |
Repayments of Holding Company senior notes |  |  |  |  |  | (1,229) | (1,159) | $ (500) |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  | 8 | 13 | 2 |  |  |  |
Total cash paid |  |  |  |  |  | $ 168 |  |  |  |  |  |
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 |  |  |  |  |  | $ 320 | 629 | 264 |  |  |  |
Debt |  | 4,699 |  | 4,847 | 4,847 | 4,699 | 4,847 |  |  |  |  |
Extinguishment of debt, amount |  |  | $ 177 |  | 57 |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  | 8 | 13 | (1) |  |  |  |
Aggregate principal amount |  |  | 177 |  |  |  |  |  |  |  |  |
Total cash paid |  |  | 168 |  |  |  |  |  |  |  |  |
Repurchase amount |  |  |  | 92 | 92 |  | 92 |  |  |  |  |
Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 4,699 |  | 4,847 | 4,847 | 4,699 | 4,847 |  |  |  |  |
Extinguishment of debt, amount |  |  | 177 |  | 57 |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt |  |  |  |  |  | $ 8 | 13 | $ (2) |  |  |  |
Aggregate principal amount |  |  | 177 |  |  |  |  |  |  |  |  |
Total cash paid |  |  | 168 |  |  |  |  |  |  |  |  |
Repurchase amount |  |  |  | 92 | 92 |  | 92 |  |  |  |  |
4.750% senior unsecured notes due 2024 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  | $ 35 | $ 35 |  | $ 35 |  |  |  |  |
Interest rate on debt instrument (in percent) |  |  |  | 4.75% | 4.75% |  | 4.75% |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  | $ 376 |  |  |  |  |  |  |  |
4.750% senior unsecured notes due 2024 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  | $ 35 | $ 35 |  | $ 35 |  |  |  |  |
Interest rate on debt instrument (in percent) |  |  |  | 4.75% | 4.75% |  | 4.75% |  |  |  |  |
Proceeds from Issuance of Debt |  |  |  | $ 376 |  |  |  |  |  |  |  |
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 (in percent) |  | 6.375% |  | 6.375% | 6.375% | 6.375% | 6.375% |  |  |  |  | 6.375%
6.375% senior unsecured notes due 2025 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  |  |  | $ 749 | $ 749 |  | $ 749 |  |  |  |  |
Interest rate on debt instrument (in percent) |  | 6.375% |  | 6.375% | 6.375% | 6.375% | 6.375% |  |  |  | 6.375% |
6.250% senior unsecured notes due 2026 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 719 |  | $ 1,238 | $ 1,238 | $ 719 | $ 1,238 |  |  |  |  |
Debt face amount |  |  | $ 12 | $ 12 | $ 12 |  | $ 12 |  |  |  |  |
Repayments of Holding Company senior notes | $ 500 |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt instrument (in percent) | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% |  | 6.25% |  |  |
Debt redemption |  | $ 21 |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  | $ 52 |  |  |  |  |  |  |  |  |
6.250% senior unsecured notes due 2026 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 719 |  | $ 1,238 | $ 1,238 | $ 719 | $ 1,238 |  |  |  |  |
Debt face amount |  |  | $ 12 | $ 12 | $ 12 |  | $ 12 |  |  |  |  |
Repayments of Holding Company senior notes | $ 500 |  |  |  |  |  |  |  |  |  |  |
Interest rate on debt instrument (in percent) | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% | 6.25% |  | 6.25% |  |  |
Debt redemption |  | $ 21 |  |  |  |  |  |  |  |  |  |
Aggregate principal amount |  |  | $ 52 |  |  |  |  |  |  |  |  |
5.250% senior unsecured notes due 2027 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 1,384 |  | $ 1,454 | $ 1,454 | $ 1,384 | $ 1,454 |  |  |  |  |
Debt face amount |  |  | $ 5 |  |  |  |  |  |  |  |  |
Interest rate on debt instrument (in percent) |  | 5.25% | 5.25% | 5.25% | 5.25% | 5.25% | 5.25% |  | 5.25% |  |  |
Aggregate principal amount |  |  | $ 73 |  |  |  |  |  |  |  |  |
4.375% senior unsecured notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 656 |  | $ 708 | $ 708 | $ 656 | $ 708 |  |  |  |  |
Interest rate on debt instrument (in percent) |  | 4.375% | 4.375% | 4.375% | 4.375% | 4.375% | 4.375% |  | 4.375% |  |  |
Aggregate principal amount |  |  | $ 52 |  |  |  |  |  |  |  |  |
4.375% senior unsecured notes due 2029 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 656 |  | $ 708 | $ 708 | $ 656 | $ 708 |  |  |  |  |
Interest rate on debt instrument (in percent) |  | 4.375% | 4.375% | 4.375% | 4.375% | 4.375% | 4.375% |  | 4.375% |  |  |
Aggregate principal amount |  |  | $ 52 |  |  |  |  |  |  |  |  |
9.750% senior unsecured notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 698 |  | $ 698 | $ 698 | $ 698 | $ 698 |  |  |  |  |
Debt face amount |  |  |  | $ 700 | $ 700 |  | $ 700 |  |  | $ 700 |  |
Interest rate on debt instrument (in percent) |  | 9.75% |  | 9.75% | 9.75% | 9.75% | 9.75% |  |  | 9.75% |  |
9.750% senior unsecured notes due 2029 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 698 |  | $ 698 | $ 698 | $ 698 | $ 698 |  |  |  |  |
Debt face amount |  |  |  | $ 700 | $ 700 |  | $ 700 |  |  | $ 700 |  |
Interest rate on debt instrument (in percent) |  | 9.75% |  | 9.75% | 9.75% | 9.75% | 9.75% |  |  | 9.75% |  |
10.000% senior notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 495 |  |  |  | $ 495 |  |  |  |  |  |
Interest rate on debt instrument (in percent) |  | 10.00% |  |  |  | 10.00% |  |  |  |  |  |
9.000% senior notes due 2030 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 747 |  |  |  | $ 747 |  |  |  |  |  |
Interest rate on debt instrument (in percent) |  | 9.00% |  | 9.00% | 9.00% | 9.00% | 9.00% |  |  |  |  |
5.250% senior unsecured notes due 2027 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  | $ 5 | $ 5 |  | $ 5 |  |  |  |  |
Interest rate on debt instrument (in percent) |  |  |  | 5.25% | 5.25% |  | 5.25% |  |  |  |  |
5.250% senior unsecured notes due 2027 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 1,384 |  | $ 1,454 | $ 1,454 | $ 1,384 | $ 1,454 |  |  |  |  |
Debt face amount |  |  | $ 5 | $ 5 | $ 5 |  | $ 5 |  |  |  |  |
Interest rate on debt instrument (in percent) |  | 5.25% | 5.25% | 5.25% | 5.25% | 5.25% | 5.25% |  | 5.25% |  |  |
Aggregate principal amount |  |  | $ 73 |  |  |  |  |  |  |  |  |
9.000% senior notes due 2030 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  |  | $ 750 |  | $ 750
Interest rate on debt instrument (in percent) |  |  |  |  |  |  |  |  | 9.00% | 9.00% |  | 9.00%
9.000% senior notes due 2030 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 747 |  |  |  | $ 747 |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  |  | $ 750 |  | $ 750
Interest rate on debt instrument (in percent) |  | 9.00% |  | 9.00% | 9.00% | 9.00% | 9.00% |  | 9.00% | 9.00% |  | 9.00%
Unregistered 9.750% senior notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  |  | $ 700 |  |
Interest rate on debt instrument (in percent) |  |  |  |  |  |  |  |  |  | 9.75% |  |
Unregistered 9.750% senior notes due 2029 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  |  | $ 700 |  |
Interest rate on debt instrument (in percent) |  |  |  |  |  |  |  |  |  | 9.75% |  |
Unregistered 9.000% senior notes due 2030 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  |  | $ 750 |  |
Interest rate on debt instrument (in percent) |  |  |  |  |  |  |  |  |  | 9.00% |  |
Unregistered 9.000% senior notes due 2030 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  |  | $ 750 |  |
Interest rate on debt instrument (in percent) |  |  |  |  |  |  |  |  |  | 9.00% |  |
10.000% senior notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  | $ 500 |  |  |
Interest rate on debt instrument (in percent) |  |  |  |  |  |  |  |  | 10.00% |  |  |
10.000% senior notes due 2029 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt |  | $ 495 |  |  |  | $ 495 |  |  |  |  |  |
Debt face amount |  |  |  |  |  |  |  |  | $ 500 |  |  |
Interest rate on debt instrument (in percent) |  | 10.00% |  | 10.00% | 10.00% | 10.00% | 10.00% |  | 10.00% |  |  |
4.375% senior unsecured notes due 2029 | Icahn Enterprises (Parent) |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  | $ 40 | $ 40 |  | $ 40 |  |  |  |  |
Interest rate on debt instrument (in percent) |  |  |  | 4.375% | 4.375% |  | 4.375% |  |  |  |  |
Repurchase amount |  |  |  | $ 84 | $ 84 |  | $ 84 |  |  |  |  |
4.375% senior unsecured notes due 2029 | Holding Company |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt face amount |  |  |  | $ 40 | $ 40 |  | $ 40 |  |  |  |  |
Interest rate on debt instrument (in percent) |  |  |  | 4.375% | 4.375% |  | 4.375% |  |  |  |  |
Repurchase amount |  | $ 84 |  |  |  | $ 84 |  |  |  |  |  |

X
- Definition Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Aggregate Ownership interest of Parent and Holding Company Subsidiaries + References No definition available. + Details
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