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Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Accounting Policies [Line Items] |  |  |
Debt | $ 7,126 |  | $ 7,692
Fair value of long-term debt | 7,000 |  | 7,800
Restricted cash | 3,801 |  | 2,115
Accumulated other comprehensive loss | $ (74) |  | (74)
Icahn Enterprises G.P. |  |  |
Accounting Policies [Line Items] |  |  |
Aggregate general partner ownership interest of parent and operating subsidiary | 1.99% |  |
Icahn Enterprises Holdings |  |  |
Accounting Policies [Line Items] |  |  |
Percentage of equity ownership in operating subsidiary | 99.00% |  |
Icahn Enterprises Holdings LP |  |  |
Accounting Policies [Line Items] |  |  |
Affiliate ownership interest | 98.01% |  |
Cash held at consolidated affiliated partnerships |  |  |
Accounting Policies [Line Items] |  |  |
Restricted cash | $ 2,084 |  | 102
Restricted cash |  |  |
Accounting Policies [Line Items] |  |  |
Restricted cash | 1,717 |  | 2,013
Real Estate Segment |  |  |
Accounting Policies [Line Items] |  |  |
Debt | 1 |  | 1
Restricted cash | 12 |  | 11
Food Packaging Segment |  |  |
Accounting Policies [Line Items] |  |  |
Debt | $ 158 |  | $ 155
Lessee term | 10 years 4 months 24 days |  | 10 years 6 months
Energy Segment |  |  |
Accounting Policies [Line Items] |  |  |
Debt | $ 1,595 |  | $ 1,660
Restricted cash | $ 7 |  | $ 7
Lessee term | 4 years 1 month 6 days |  | 4 years 1 month 6 days
Remaining performance obligation expected to be recognized as revenue within one year | $ 6 |  |
Remaining performance obligation for contracts with an original expected duration of more than one year | 10 |  |
Deferred revenue | 81 |  | $ 87
Recorded revenue | 17 | $ 8 |
Automotive Segment |  |  |
Accounting Policies [Line Items] |  |  |
Debt | 20 |  | 26
Restricted cash | $ 17 |  | $ 17
Lessee term | 4 years 4 months 24 days |  | 4 years 10 months 24 days
Deferred revenue | $ 42 |  | $ 42
Recorded revenue | $ 6 | $ 6 |

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