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Net Income Attributable to Company Per Share
 6 Months Ended
Jun. 30, 2011
Net Income Attributable to Company Per Share [Abstract]  
Net Income Attributable to Company Per Share
11. Net Income Attributable to Company Per Share
The following table sets forth the computation of weighted average basic and diluted shares outstanding (in millions, except per share data):
                                 
    Three Months Ended     Six Months Ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Numerator:
                               
Net income attributable to Company
  $ 481     $ 401     $ 888     $ 823  
 
                       
Denominator:
                               
Basic—weighted average common shares outstanding
    422       417       421       417  
Dilutive effect of employee stock options and other unvested stock awards
    3       2       3       2  
 
                       
Diluted outstanding shares
    425       419       424       419  
 
                       
Net income attributable to Company per share:
                               
Basic
  $ 1.14     $ 0.96     $ 2.11     $ 1.97  
 
                       
Diluted
  $ 1.13     $ 0.96     $ 2.10     $ 1.96  
 
                       
Cash dividends per share
  $ 0.11     $ 0.10     $ 0.22     $ 0.20  
 
                       
In addition, the Company had stock options outstanding that were anti-dilutive totaling 2 million and 3 million shares for the three and six months ended June 30, 2011, respectively, and 6 million and 5 million shares for the three and six months ended June 30, 2010, respectively.