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Stock-Based Incentive Plan (Tables)
6 Months Ended
Jun. 30, 2011
Stock-Based Incentive Plan  
Stock Option Activity
     Number of Shares
Under Option
    Weighted
Average
Exercise Price
per Share
 

Outstanding at December 31, 2010

     23,840,049      $ 15.99   

Options granted

     4,292,178        22.73   

Options exercised

     (4,100,541     15.01   

Options forfeited

     (301,880     17.59   
          

Outstanding at June 30, 2011

     23,729,806      $ 17.36   
          

Vested and expected to vest at June 30, 2011

     22,459,361      $ 17.28   
          

Options exercisable at June 30, 2011

     14,640,269      $ 16.11   
          
Status of Company's Nonvested Restricted Stock and Restricted Stock Unit Awards and Changes
     Number of
Restricted
Stock Awards
    Weighted  Average
Grant-Date
Fair Value per Share
 

Nonvested at December 31, 2010

     2,339,410      $ 15.36   

Granted

     1,134,908        22.71   

Released

     (967,950     12.79   

Forfeited

     (46,910     15.77   
          

Nonvested at June 30, 2011

     2,459,458      $ 19.75