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Defined Contribution and Deferred Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2012
Notes to Financial Statements [Abstract]  
Deferred compensation plans liabilities and investments
        As of December 31,   
        2012 2011   
Total liabilities (1)$ 386 $ 354   
Investments held to fund liabilities (2)  146   133   
Expenses for deferred compensation plans
        For the Years Ended December 31,
        2012 2011 2010
Employer matching contributions$ 7 $ 6 $ 6
Increase (decrease) in measurement of liabilities, net of total return swap  7   1   1
 Total plan expenses (income)$ 14 $ 7 $ 7

        For the Years Ended December 31,
        2012 2011 2010
Employer matching contributions$ 1 $ 1 $ 3
Increase (decrease) in measurement of liabilities, net of total return swap  2   -   3
 Total plan expenses (income)$ 3 $ 1 $ 6