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Earnings Per Common Share (EPS)
6 Months Ended
Jun. 30, 2011
Earnings Per Share [Abstract]  
Earnings Per Common Share (EPS)

13. Earnings Per Common Share (EPS)

The computations of basic and diluted EPS were as follows:

      Three Months Ended Six Months Ended
      June 30, June 30,
(Millions, except per share amounts) 2011  2010 2011  2010
Numerator:            
 Basic and diluted:            
  Income from continuing operations $1,295 $1,017 $2,472 $1,902
  Earnings allocated to participating share awards            
   and other items(a)  (15)  (13)  (30)  (25)
  Income from discontinued operations, net of tax  36    36  
  Net income attributable to common shareholders $1,316 $1,004 $2,478 $1,877
Denominator:            
 Basic: Weighted-average common stock  1,190  1,190  1,190  1,188
 Add: Weighted-average stock options (b)  7  7  7  6
 Diluted  1,197  1,197  1,197  1,194
                 
Basic EPS:            
 Income from continuing operations attributable to common            
  shareholders $1.08 $0.84 $2.05 $1.58
 Income from discontinued operations  0.03    0.03  
 Net income attributable to common shareholders $1.11 $0.84 $2.08 $1.58
Diluted EPS:            
 Income from continuing operations attributable to common            
  shareholders $1.07 $0.84 $2.04 $1.57
 Income from discontinued operations  0.03    0.03  
 Net income attributable to common shareholders $1.10 $0.84 $2.07 $1.57

(a)       The Company's unvested restricted stock awards, which include the right to receive non-forfeitable dividends or dividend equivalents, are considered participating securities. Calculations of EPS under the two-class method (i) exclude any dividends paid or owed on participating securities and any undistributed earnings considered to be attributable to participating securities from the numerator and (ii) exclude the participating securities from the denominator.

(b)       For the three and six months ended June 30, 2011, the dilutive effect of unexercised stock options excludes 19 million and 20 million options, respectively. For the three and six months ended June 30, 2010, the dilutive effect of unexercised stock options excludes 35 million and 38 million options, respectively. Such amounts for all periods were excluded from the computation of EPS because inclusion of the options would have been anti-dilutive.

Subordinated debentures of $750 million issued by the Company in 2006 would affect the EPS computation only in the unlikely event the Company fails to achieve specified performance measures related to the Company's tangible common equity and consolidated net income. In that circumstance the Company would reflect the additional common shares in the EPS computation.