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Earnings Per Share (Tables)
3 Months Ended
Aug. 31, 2019
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following is a reconciliation from basic earnings per common share to diluted earnings per common share. The computations of diluted earnings per common share excluded options, including shares under ESPPs, to purchase an additional 19.1 million and 3.1 million shares of common stock outstanding for the three months ended August 31, 2019 and 2018, respectively, because the options were anti-dilutive.
 
THREE MONTHS ENDED AUGUST 31,
(Dollars in millions, except per share data)
2019
2018
Net income available to common stockholders
$
1,367

$
1,092

Determination of shares:
 
 
Weighted average common shares outstanding
1,562.4

1,594.0

Assumed conversion of dilutive stock options and awards
35.1

40.4

DILUTED WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
1,597.5

1,634.4

Earnings per common share:
 
 
Basic
$
0.87

$
0.69

Diluted
$
0.86

$
0.67