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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Denominator For Basic And Diluted Earnings Per Share
The denominator for basic and diluted earnings per share for the three and nine months ended September 30, 2013 and 2012 was as follows:
 
Three Months Ended 
 September 30

Nine Months Ended 
 September 30
 
2013
 
2012
 
2013
 
2012
Denominator for basic earnings per share – weighted average shares
297.4

 
318.9

 
300.0

 
327.2

Effect of dilutive securities – employee stock options, non-vested restricted stock awards and convertible debentures
7.1

 
3.0

 
4.5

 
3.5

Denominator for diluted earnings per share
304.5

 
321.9

 
304.5

 
330.7