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Earnings Per Share (Tables)
6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Computation of Basic Earnings Per Share, Assuming Dilution
The following table sets forth the computation of basic earnings per share and earnings per share, assuming dilution:
 
Second Quarters
 
Six Months
 
2018
2017
 
2018
2017
Numerator (Dollars in millions):
 
 
 
 
 
Net Earnings
$
877

$
510

 
$
1,572

$
872

 
 
 
 
 
 
Denominator (Units in millions):
 
 
 
 
 
Average Common Shares Outstanding
864

920

 
875

923

Other Potentially Dilutive Common Shares
4

4

 
3

3

Average Common Shares Outstanding, Assuming Dilution
868

924

 
878

926

 
 
 
 
 
 
Net Earnings Per Share, Basic
$
1.02

$
0.55

 
$
1.80

$
0.94

Net Earnings Per Share, Assuming Dilution
$
1.01

$
0.55

 
$
1.79

$
0.94