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Note 17: Financial Instruments (Detail) - Financial Instruments (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Marketable securities    
Long-term held-to-maturity $ 23  
23  
Debt    
Short-term debt 42 152
38  
Long-term debt 1,434 1,363
1,160  
Debt subject to compromise 2,968  
103  
Debt Subject to Compromise [Member]
   
Debt    
Debt subject to compromise $ 683