Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Accounting Policies [Line Items]
Debt	$ 7,127		$ 7,692
Fair value of long-term debt	6,400		7,800
Restricted cash	$ 4,778		2,115
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	$ 3,640		102
Restricted cash
Accounting Policies [Line Items]
Restricted cash	1,138		2,013
Energy Segment
Accounting Policies [Line Items]
Debt	1,593		1,660
Restricted cash	7		7
Remaining performance obligation expected to be recognized as revenue within one year	2
Remaining performance obligation for contracts with an original expected duration of more than one year	7
Deferred revenue	65		87
Recorded revenue	86	$ 30
Automotive Segment
Accounting Policies [Line Items]
Debt	15		26
Restricted cash	10		17
Deferred revenue	43		$ 42
Recorded revenue	$ 19	$ 18

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

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Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable.

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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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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

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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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