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(Details) (USD $)
3 Months Ended 0 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2013
Icahn Enterprises G.P. [Member]
May 02, 2013
Principal Owners and Affiliates [Member]
Mar. 31, 2013
Principal Owners and Affiliates [Member]
Mar. 31, 2013
Restricted cash [Member]
Dec. 31, 2012
Restricted cash [Member]
Mar. 31, 2013
Icahn Enterprises G.P. [Member]
Mar. 31, 2013
Icahn Enterprises Holdings [Member]
Dec. 31, 2012
Icahn Enterprises Holdings [Member]
Entity Information [Line Items]                    
Percentage of equity ownership in operating subsidiary                 99.00%  
General partner ownership percentage in Icahn Enterprises     1.00%              
General partner ownership interest in Icahn Enterprises Holdings               1.00%    
Aggregate general partner ownership interest of parent and operating subsidiary     1.99%              
Affiliate ownership interest in Icahn Enterprises (in units)         97,764,251          
Affiliate ownership interest in Icahn Enterprises       90.60% 90.50%          
Debt $ 8,184,000,000 $ 8,548,000,000             $ 8,176,000,000 $ 8,540,000,000
Fair value of long-term debt 8,300,000,000 8,600,000,000                
Cash held at consolidated affiliated partnerships and restricted cash $ 1,424,000,000 $ 1,419,000,000       $ 1,300,000,000 $ 700,000,000   $ 1,424,000,000 $ 1,419,000,000