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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 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:
 
Second Quarters
 
Six Months
 
2017
2016
 
2017
2016
Numerator (Dollars in millions):
 
 
 
 
 
Net Earnings
$
510

$
445

 
$
872

$
801

Dividend Equivalents on Restricted Stock
—

—

 
—

(1
)
Net Earnings, Attributable to Common Shareholders
$
510

445

 
$
872

800

 
 
 
 
 
 
Denominator (Units in millions):
 
 
 
 
 
Average Common Shares Outstanding
920

952

 
923

957

Other Potentially Dilutive Common Shares
4

—

 
3

1

Average Common Shares Outstanding, Assuming Dilution
924

952

 
926

958

 
 
 
 
 
 
Net Earnings Per Share, Basic
$
0.55

$
0.47

 
$
0.94

$
0.84

Net Earnings Per Share, Assuming Dilution
$
0.55

$
0.47

 
$
0.94

$
0.84