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Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Asset Derivatives, Gross $ 7,000,000 [1] $ 6,000,000 [1]  
Asset Derivatives, Netting across contract types 0 [1],[2] 0 [1],[2]  
Asset Derivatives, Total 7,000,000 [1],[2] 6,000,000 [1],[2]  
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross 100,000,000 [3] 42,000,000 [3]  
Liability Derivatives, Netting across contract types 0 [2],[3] 0 [2],[3]  
Liability Derivatives, Total 100,000,000 [2],[3] 42,000,000 [2],[3]  
Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Asset Derivatives, Gross 0 [1] 3,000,000 [1]  
Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross 82,000,000 [3] 42,000,000 [3]  
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Asset Derivatives, Gross 0 [1] 3,000,000 [1]  
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross 10,000,000 [3] 0 [3]  
Not Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Derivative Asset, Fair Value, Net 7,000,000 [1] 0 [1]  
Not Designated as Hedging Instrument [Member] | Commodity contracts [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Derivative Liability, Fair Value, Net 8,000,000 [3] 0 [3]  
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Asset Derivatives, Gross   6,000,000 [1] 25,000,000 [1]
Asset Derivatives, Netting across contract types   0 [1],[4] (19,000,000) [1],[4]
Asset Derivatives, Total   6,000,000 [1],[5] 6,000,000 [1],[5]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross   42,000,000 [3] 103,000,000 [3]
Liability Derivatives, Netting across contract types   0 [3],[4] (19,000,000) [3],[4]
Liability Derivatives, Total   42,000,000 [3],[5] 84,000,000 [3],[5]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Asset Derivatives, Gross   3,000,000 [1] 1,000,000 [1]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Equity Contract [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross   42,000,000 [3] 2,000,000 [3]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Asset Derivatives, Gross   3,000,000 [1] 0 [1]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross   0 [3] 2,000,000 [3]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Asset Derivatives, Gross   0 [1] 24,000,000 [1]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Credit Risk Contract [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross   0 [3] 77,000,000 [3]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Futures Index Spread [Member] | Other Assets [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Asset Derivatives, Gross   0 [1] 0 [1]
Investment segment and Icahn Enterprises Holdings [Member] | Not Designated as Hedging Instrument [Member] | Futures Index Spread [Member] | Accrued Expenses and Other Liabilities [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross   0 [3] 22,000,000 [3]
Investment Funds [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Cash collateral posted for derivative positions 530,000,000 257,000,000 248,000,000
Icahn Enterprises Holdings [Member] | Futures Index Spread [Member]
      
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]      
Liability Derivatives, Gross   $ 0 $ 22,000,000
[1] Net asset derivatives are located within other assets in our consolidated balance sheets.
[2] Excludes netting of cash collateral received and posted. The total collateral posted at June 30, 2012 and December 31, 2011 was $530 million and $257 million, respectively, across all counterparties.
[3] Net liability derivatives are located within accrued expenses and other liabilities in our consolidated balance sheets.
[4] Represents the netting of receivables balances with payable balances for the same counterparty across contract types pursuant to netting agreements.
[5] Excludes netting of cash collateral received and posted. The total collateral posted at December 31, 2011 and 2010 was $257 million and $248 million, respectively, across all counterparties.