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Discontinued Operations (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Mar. 31, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Former Business Ownership Interest           100.00%
Gain On Reconsolidation $ 0   $ 0 $ 144 $ 0  
Notes Receivable, Fair Value Disclosure   88        
Fair Value Inputs, Discount Rate   12.00%        
Former Venezuela Operations [Memeber]
           
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Cash Payments Received Related To Former Venezuela Operations Settlement   98        
Cash Installments Related to Former Venezuela Operations Settlement   $ 15        
Maximum [Member]
           
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Fair Value Inputs, Probability of Default   100.00%        
Minimum [Member]
           
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Fair Value Inputs, Probability of Default   15.00%