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Earnings Per Share
 6 Months Ended
Jun. 30, 2013
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Earnings Per Share

Note 12: Earnings Per Share

Basic earnings per share excludes dilution and is computed by dividing income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflects the dilutive effect of all stock options, warrants and other items outstanding during the period that could potentially result in the issuance of common stock. For the three months ended June 30, 2013 and 2012, there were 26,762,203 and 28,737,819, respectively, of stock options and warrants outstanding that were not included in the diluted earnings per share calculation because they were antidilutive. For the six months ended June 30, 2013 and 2012, there were 27,563,460 and 28,812,255, respectively, of stock options and warrants outstanding that were not included in the diluted earnings per share calculation because they were antidilutive.

The following table presents the computation of basic and diluted earnings per share for the three and six months ended June 30, 2013 and 2012:

              
   Three Months Ended June 30, Six Months Ended June 30,
$ in millions except share and per share amounts 2013 2012 2013  2012
Net income (loss) $(178) $581 $(14) $591
Basic weighted average shares (1)  193,104,610  193,926,953  193,810,351  193,700,328
Effect of common stock equivalents:            
 Stock options and warrants  0  1,014,280  0  1,063,289
Diluted weighted average shares  193,104,610  194,941,233  193,810,351  194,763,617
Net income (loss) per common share:            
 Basic $(0.92) $2.99 $(0.07) $3.05
 Diluted $(0.92) $2.98 $(0.07) $3.03
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(1) - Includes 4,490,348 and 5,597,797 of unvested restricted stock and units that receive nonforfeitable dividends or dividend equivalents for the three months ended June 30,
 2013 and 2012, respectively. Includes 5,303,456 and 5,400,564 of unvested restricted stock and units that receive nonforfeitable dividends or dividend equivalents for the
 six months ended June 30, 2013 and 2012, respectively.