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Description of Business (Details) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2023 USD ($) product item	Dec. 31, 2022 USD ($)
Description of Business [Line Items]
Proceeds from partial sale of interests in consolidated subsidiaries		$ 158
Icahn Enterprises Holdings
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		99.00%
Icahn Enterprises Holdings | Icahn Enterprises G.P.
Description of Business [Line Items]
General partner ownership percentage in Icahn Enterprises		1.00%
Icahn Enterprises Holdings | Mr. Icahn and affiliates
Description of Business [Line Items]
Affiliate ownership interest		85.00%
Icahn Enterprises G.P.
Description of Business [Line Items]
Aggregate general partner ownership interest of parent and operating subsidiary		1.99%
CVR Refining
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		37.00%
CVR Energy | Energy Segment
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		66.00%
Viskase | Private Placement
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		90.00%
Investment Funds
Description of Business [Line Items]
Fair value of investment in subsidiary	$ 3,600	$ 3,600	$ 4,200
CVR Partners | CVR Energy
Description of Business [Line Items]
Percentage of equity ownership in operating subsidiary		100.00%
CVR Energy | Energy Segment
Description of Business [Line Items]
Proceeds from partial sale of interests in consolidated subsidiaries	$ 158
Vivus | Pharma Segment
Description of Business [Line Items]
Number of approved therapies | item		2
Number of product candidates in active clinical development | product		2

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Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Aggregate Ownership interest of Parent and Holding Company Subsidiaries

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