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Commitments and Contingencies Commitments and Contingencies (Details) (USD $)
 0 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 3 Months Ended 12 Months Ended
May 02, 2013
Principal Owners and Affiliates [Member]
Mar. 31, 2013
Principal Owners and Affiliates [Member]
Mar. 31, 2013
ACF [Member]
Dec. 31, 2012
ACF [Member]
Mar. 31, 2013
Starfire Holding Corporation [Member]
Mar. 31, 2013
Automotive Segment [Member]
Dec. 31, 2012
Automotive Segment [Member]
Aug. 12, 2010
Tropicana [Member]
Gaming Segment [Member]
Mar. 31, 2013
PSC Metals [Member]
Metals Segment [Member]
Dec. 31, 2012
PSC Metals [Member]
Metals Segment [Member]
Mar. 31, 2013
PSC Metals [Member]
Metals Segment [Member]
Cleveland OH Scrap Processing Facility [Member]
Dec. 31, 2011
PSC Metals [Member]
Metals Segment [Member]
Cleveland OH Scrap Processing Facility [Member]
Mar. 31, 2013
WPH [Member]
Home Fashion Segment [Member]
Dec. 31, 2012
WPH [Member]
Home Fashion Segment [Member]
Mar. 31, 2013
Federal-Mogul [Member]
Automotive Segment [Member]
Dec. 31, 2012
Federal-Mogul [Member]
Automotive Segment [Member]
Mar. 31, 2013
Icahn Enterprises G.P. [Member]
Principal Owners and Affiliates [Member]
Dec. 31, 2011
CRNF [Member]
Energy Segment [Member]
Dec. 31, 2010
CRNF [Member]
Energy Segment [Member]
Dec. 31, 2009
CRNF [Member]
Energy Segment [Member]
Dec. 31, 2008
CRNF [Member]
Energy Segment [Member]
Loss Contingencies [Line Items]                                          
Accrued environmental liabilities           $ 14,000,000 $ 15,000,000   $ 29,000,000 $ 29,000,000     $ 1,000,000 $ 1,000,000              
Possible material additional losses, above and beyond best estimate of required remediation costs                             42,000,000            
Asset Retirement Obligation                             29,000,000 29,000,000          
Compensatory damages sought               100,000,000                          
Average increase in annual property tax expense                                   11,000,000 12,000,000 11,000,000 11,000,000
Negotiated settlement to resolve Port Refinery environmental matter                 225,000                     11,000,000  
Number of scrap processing facilities requiring refrigerant extraction services                     11                    
Number of years refrigerant extraction services must be offered at scrap processing facilities                     3 years                    
Costs associated with required injunctive relief, low estimate                     800,000                    
Costs associated with required injunctive relief, high estimate                     1,700,000                    
Civil penalty assessed and paid                       199,000                  
Affiliate ownership in parent company general partner                                 100.00%        
Affiliate ownership interest 90.60% 90.50%                                      
Defined Benefit Plan, Funded Status of Plan     127,000,000 130,000,000                                  
Ownership Percentage by Mr. Icahn         100.00%                                
Subsidiary Indemnity Agreement, Pension Funding Contingencies As A Result of Being In The Controlled Group, Distribution Limitation, Net Worth Floor         $ 250,000,000