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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2017
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:
 
First Quarters
 
2017
2016
Numerator (Dollars in millions):
 
 
Net Earnings
$
362

$
356

 
 
 
Denominator (Units in millions):
 
 
Average Common Shares Outstanding
927

962

Other Potentially Dilutive Common Shares
2

1

Average Common Shares Outstanding, Assuming Dilution
929

963

 
 
 
Net Earnings Per Share, Basic
$
0.39

$
0.37

Net Earnings Per Share, Assuming Dilution
$
0.39

$
0.37