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Defined Contribution and Deferred Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2011
Notes to Financial Statements [Abstract]  
Deferred compensation plans liabilities and investments
        As of December 31,    
        2011 2010    
Total liabilities (1)$ 354 $ 363    
Investments held to fund liabilities (2)  133   130    
Expenses for deferred compensation plans
        For the Years Ended December 31, 
        2011 2010 2009 
Employer matching contributions$ 6 $ 6 $ 4 
Increase (decrease) in measurement of liabilities, net of total         
 return swap  1   1   (5) 
  Total plan expenses (income)$ 7 $ 7 $ (1) 

        For the Years Ended December 31, 
        2011 2010 2009 
Employer matching contributions$ 1 $ 3 $ 1 
Increase (decrease) in measurement of liabilities, net of total         
 return swap  -   3   3 
  Total plan expenses (income)$ 1 $ 6 $ 4