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Earnings Per Share
 6 Months Ended
Mar. 31, 2016
Earnings Per Share [Abstract]  
EARNINGS PER SHARE
EARNINGS PER SHARE

The following table sets forth the numerators and denominators used in the computation of basic and diluted earnings per share. Options to purchase 6.4 million and 8.7 million shares of common stock were excluded from the computation of diluted earnings per share for the 2016 and 2015 periods, respectively, because their effect would have been antidilutive.
 
 
Three Months Ended 
 March 31,
 
Six Months Ended 
 March 31,
 
 
2016
 
2015
 
2016
 
2015
 
 
(In millions)
Numerator:
 
 
 
 
 
 
 
 
Net income
 
$
195.1

 
$
147.9

 
$
352.8

 
$
290.4

Denominator:
 
 
 
 
 
 
 
 
Denominator for basic earnings per share — weighted average common shares
 
370.2

 
365.8

 
369.7

 
365.4

Effect of dilutive securities:
 
 
 
 
 
 
 
 
Employee stock awards
 
3.5

 
3.6

 
3.9

 
3.4

Denominator for diluted earnings per share — adjusted weighted average common shares
 
373.7

 
369.4

 
373.6

 
368.8

 
 
 
 
 
 
 
 
 
Basic net income per common share
 
$
0.53

 
$
0.40

 
$
0.95

 
$
0.79

Net income per common share assuming dilution
 
$
0.52

 
$
0.40

 
$
0.94

 
$
0.79