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Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Accounting Policies [Line Items] |  |  |
Total assets | $ 17,988 |  | $ 20,858
Debt | 6,625 |  | 7,207
Fair value of long-term debt | 6,400 |  | 6,900
Restricted cash | $ 3,442 |  | 2,995
Icahn Enterprises Holdings |  |  |
Accounting Policies [Line Items] |  |  |
Percentage of equity ownership in operating subsidiary | 99.00% |  |
Cash held at consolidated affiliated partnerships |  |  |
Accounting Policies [Line Items] |  |  |
Restricted cash | $ 1,631 |  | 1,068
Restricted cash |  |  |
Accounting Policies [Line Items] |  |  |
Restricted cash | 1,811 |  | 1,927
Primary beneficiary |  |  |
Accounting Policies [Line Items] |  |  |
Total assets | 106 |  |
Energy |  |  |
Accounting Policies [Line Items] |  |  |
Total assets | 4,522 |  | 5,259
Debt | 1,584 |  | 2,185
Restricted cash |  |  | 7
Remaining performance obligation for contracts with an original expected duration of more than one year | 32 |  |
Deferred revenue | 38 |  | 49
Recorded revenue | 13 | $ 46 |
Automotive Segment |  |  |
Accounting Policies [Line Items] |  |  |
Total assets | 1,964 |  | 2,019
Debt | 27 |  | 33
Restricted cash | 7 |  | 9
Deferred revenue | 42 |  | $ 45
Recorded revenue | 12 | $ 13 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Energy |  |  |
Accounting Policies [Line Items] |  |  |
Remaining performance obligation expected to be recognized as revenue within one year | $ 8 |  |
Remaining performance obligation for contracts with an original expected duration of more than one year | 1 year |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Energy |  |  |
Accounting Policies [Line Items] |  |  |
Remaining performance obligation expected to be recognized as revenue within one year | $ 11 |  |
Remaining performance obligation for contracts with an original expected duration of more than one year | 1 year |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Energy |  |  |
Accounting Policies [Line Items] |  |  |
Remaining performance obligation expected to be recognized as revenue within one year | $ 10 |  |
Remaining performance obligation for contracts with an original expected duration of more than one year | 1 year |  |

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