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Description of Business (Details)
$ in Billions
6 Months Ended
Jun. 30, 2023
USD ($)
item
product
Dec. 31, 2022
USD ($)
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 71.00%  
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 | $ $ 3.8 $ 4.2
CVR Partners | CVR Energy    
Description of Business [Line Items]    
Percentage of equity ownership in operating subsidiary 100.00%  
Vivus | Pharma Segment    
Description of Business [Line Items]    
Number Of Approved Therapies | item 2  
Number Of Product Candidate In Active Clinical Development | product 1