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Share Repurchase Programs (Tables)
9 Months Ended
Sep. 30, 2012
Share Repurchase Programs [Abstract]  
Share Repurchase Program
                 

Program

  Amount
Authorized
    Number of
Shares
Repurchased
 
    (In millions)     (In millions)  
     

July 2008 – October 2008

  $ 400       5.9  

May 2009 – July 2009

    250       3.7  

July 2009 – January 2010

    750       9.7  

February 2010 – May 2010

    250       3.3  

August 2010 * – August 2011

    1,400       15.0  

August 2011 – February 2012

    750       6.7  

August 2012 –

    500       0.7  
   

 

 

   

 

 

 

Total

  $ 4,300       45.0