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(Details) - shares
12 Months Ended
Dec. 31, 2015
Dec. 31, 2013
Principal Owners and Affiliates [Member]    
Entity Information [Line Items]    
Affiliate ownership interest in Icahn Enterprises (in units) 117,033,818  
Affiliate ownership interest in Icahn Enterprises 89.00%  
Icahn Enterprises G.P. [Member]    
Entity Information [Line Items]    
General partner ownership percentage in Icahn Enterprises 1.00% 1.00%
General partner ownership interest in Icahn Enterprises Holdings 1.00%  
Aggregate general partner ownership interest of parent and operating subsidiary 1.99%  
Icahn Enterprises Holdings [Member]    
Entity Information [Line Items]    
Percentage of equity ownership in operating subsidiary 99.00%