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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Recorded revenue with respect to deferred revenue Outstanding

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount of short-term and long-term debt and lease obligation.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

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