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Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Not Designated as Hedging Instrument [Member] | Other Assets [Member]
    
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]    
Asset Derivatives, Gross $ 7 [1] $ 6 [1]
Asset Derivatives, Netting across contract types 0 [1],[2] 0 [1],[2]
Asset Derivatives, Total 7 [1],[2] 6 [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 [3] 42 [3]
Liability Derivatives, Netting across contract types 0 [2],[3] 0 [2],[3]
Liability Derivatives, Total 100 [2],[3] 42 [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 [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 [3] 42 [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 [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 [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 [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 [3] 0 [3]
Investment Funds [Member]
    
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items]    
Cash collateral posted for derivative positions $ 530 $ 257
[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.