
Note 13.	Per Share Data

Basic loss per common share is calculated by dividing net loss by the weighted average number of common shares outstanding during the period. Diluted earnings (loss) per common share adjusts basic earnings (loss) per common share, computed using the treasury stock method, for the effects of potentially dilutive common shares, if the effect is not antidilutive. Potentially dilutive common shares issuable under our equity-based compensation plans where the average market price exceeded the exercise price were 34 million and 12 million shares as of June 30, 2013 and 2012, respectively. In addition, as of June 30, 2013, all 590 million shares issuable under the Convertible Bond were treated as potentially dilutive securities. However, all such potentially dilutive shares were antidilutive for the three and six-month periods ended June 30, 2013 and 2012 and, therefore, have no effect on our determination of dilutive weighted average number of shares outstanding.