Shares used to calculate earnings per share
9 Months Ended
Sep. 30, 2011
Weighted Average Number of Shares Outstanding Reconciliation [Abstract] 
Shares used to calculate earnings per share

Note 3 – Shares used to calculate earnings per share

 

Shares used to calculate earnings per share were as follows:

 

    Three Months Nine Months  
    Ended September 30, Ended September 30, 
 (In millions) 2011 2010 2011 2010 
            
 Weighted-average shares:         
  Basic (a)  48.0  47.8  47.8  48.4 
  Effect of dilutive stock options and awards  0.1  0.1  0.3  0.3 
  Diluted  48.1  47.9  48.1  48.7 
            
 Antidilutive stock options and awards excluded from denominator  2.7  2.7  2.2  2.6 

(a)              We have deferred compensation plans for directors and certain of our employees. Amounts owed to participants are denominated in common stock units. Each unit represents one share of common stock. The number of shares used to calculate basic earnings per share includes the weighted-average units credited to employees and directors under the deferred compensation plans. Accordingly, included in basic shares are weighted-average units of 1.2 million in the three months and 1.1 million in nine months ended September 30, 2011, and 1.0 million in the three months and 0.9 million in nine months ended September 30, 2010.