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Description of Business and Basis of Presentation (Details) (USD $)
 6 Months Ended 12 Months Ended 6 Months Ended 6 Months Ended 2 Months Ended 6 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2012
Restricted cash [Member]
Dec. 31, 2011
Restricted cash [Member]
Jun. 30, 2012
Principal Owners and Affiliates [Member]
Dec. 31, 2011
Principal Owners and Affiliates [Member]
Jun. 30, 2012
Icahn Enterprises G.P. [Member]
Jun. 30, 2012
Icahn Enterprises Holdings [Member]
Dec. 31, 2011
Icahn Enterprises Holdings [Member]
Jun. 30, 2012
Icahn Enterprises G.P. [Member]
Jun. 30, 2012
Energy Segment [Member]
Jun. 30, 2012
Nitrogen Fertilizer [Member]
Energy Segment [Member]
Jun. 30, 2012
Minimum [Member]
Refineries [Member]
Energy Segment [Member]
Jun. 30, 2012
Maximum [Member]
Refineries [Member]
Energy Segment [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 operating subsidiary                   1.00%        
Aggregate general partner ownership interest of parent and operating subsidiary             1.99%              
Affiliate ownership interest in Icahn Enterprises (in units)         93,309,237                  
Affiliate ownership interest in Icahn Enterprises         93.00% 92.60%                
Carrying value of long-term debt $ 8,205,000,000 $ 6,473,000,000           $ 3,770,000,000 $ 3,056,000,000   $ 907,000,000      
Fair value of long-term debt 8,400,000,000 6,500,000,000                        
Cash held at consolidated affiliated partnerships and restricted cash 1,372,000,000 4,979,000,000 1,000,000,000 4,800,000,000       2,000,000 16,000,000   0      
Planned major maintenance                     $ 2,000,000      
Planned major maintenance (in years)                       2 years 4 years 5 years