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Earnings Per Share
 6 Months Ended
Jun. 30, 2011
Earnings Per Share [Abstract]  
EARNINGS PER SHARE
3. EARNINGS PER SHARE
Basic earnings per share of common stock are computed using the weighted average of actual common shares outstanding during the relevant period as the denominator. The denominator for diluted earnings per share of common stock reflects the weighted average of common shares outstanding plus the potential additional common shares that would be issued if dilutive securities and other agreements to issue common stock were exercised. The following table reconciles basic and diluted earnings per share of common stock:
                                 
  Three Months     Six Months  
Reconciliation of Basic and Diluted Earnings per Share   Ended June 30     Ended June 30  
of Common Stock   2011     2010     2011     2010  
    (In millions, except per share amounts)  
 
                               
Earnings available to FirstEnergy Corp.
  $ 181     $ 265     $ 231     $ 420  
 
                       
Weighted average number of basic shares outstanding(1)
    418       304       380       304  
Assumed exercise of dilutive stock options and awards
    2       1       2       1  
 
                       
Weighted average number of diluted shares outstanding(1)
    420       305       382       305  
 
                       
 
                               
Basic earnings per share of common stock
  $ 0.43     $ 0.87     $ 0.61     $ 1.38  
 
                       
Diluted earnings per share of common stock
  $ 0.43     $ 0.87     $ 0.61     $ 1.37  
 
                       
     
(1)  
Includes 113 million shares issued to AE stockholders for the periods subsequent to the merger date. (See Note 2)