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Earnings Per Common Share
 6 Months Ended
Jun. 30, 2011
Earnings Per Common Share [Abstract]  
Earnings Per Common Share
Note 21.  Earnings Per Common Share
 
Basic earnings per common share (EPS) is calculated by dividing net earnings applicable to common shareholders by the weighted average number of common shares outstanding. Common shares outstanding includes common stock and RSUs for which no future service is required as a condition to the delivery of the underlying common stock. Diluted EPS includes the determinants of basic EPS and, in addition reflects the dilutive effect of the common stock deliverable for stock warrants and options and for RSUs for which future service is required as a condition to the delivery of the underlying common stock. The firm treats unvested share-based payment awards that have non-forfeitable rights to dividends or dividend equivalents as a separate class of securities in calculating EPS.
 
The table below presents the computations of basic and diluted EPS.
 
                                     
 
    Three Months
 		    Six Months 
    Ended June     Ended June 
in millions, except per share amounts   2011     2010     2011     2010      
 
Numerator for basic and diluted EPS — net earnings applicable to common shareholders
  $ 1,052     $ 453     $ 1,960     $ 3,749      
Denominator for basic EPS — weighted average number of common shares
    531.9       539.8       536.2       542.9      
Effect of dilutive securities:
                                   
RSUs
    14.3       14.2       13.4       13.2      
Stock options and warrants
    23.3       26.4       26.8       29.1      
 
 
Dilutive potential common shares
    37.6       40.6       40.2       42.3      
 
 
Denominator for diluted EPS — weighted average number of common shares and dilutive potential common shares
    569.5       580.4       576.4       585.2      
Basic EPS
  $ 1.96     $ 0.82     $ 3.62     $ 6.87      
Diluted EPS
    1.85       0.78       3.40       6.41      
 
 
 
In the table above, unvested share-based payment awards that have non-forfeitable rights to dividends or dividend equivalents are treated as a separate class of securities in calculating EPS. The impact of applying this methodology was a reduction to basic EPS of $0.02 for both the three months ended June 2011 and June 2010, and $0.04 for both the six months ended June 2011 and June 2010.
 
The diluted EPS computations in the table above do not include the antidilutive effect as follows:
 
                                     
 
    Three Months
 		    Six Months 
    Ended June     Ended June 
in millions   2011     2010     2011     2010      
 
Number of antidilutive RSUs and common shares underlying antidilutive stock options and warrants
    6.5       6.1       6.3       6.0