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Earnings Per Share (Tables)
 9 Months Ended
Jun. 30, 2020
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted The following table sets forth the computation of basic and diluted earnings per share under the two-class method (in millions, except per share data):

 

 

Three Months Ended

 

 

Nine Months Ended

 

 

 

June 30,

 

 

June 30,

 

 

 

2020

 

 

2019

 

 

2020

 

 

2019

 

Numerator:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Net income attributable to common stockholders

 

$

178.5

 

 

$

252.6

 

 

$

465.1

 

 

$

552.1

 

Less: Distributed and undistributed income

   available to participating securities

 

 

—

 

 

 

—

 

 

 

(0.1

)

 

 

—

 

Distributed and undistributed income available to

   common stockholders

 

$

178.5

 

 

$

252.6

 

 

$

465.0

 

 

$

552.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Denominator:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Basic weighted average shares outstanding

 

 

259.4

 

 

 

257.3

 

 

 

258.9

 

 

 

256.2

 

Effect of dilutive stock options and non-

   participating securities

 

 

1.0

 

 

 

1.3

 

 

 

1.3

 

 

 

2.9

 

Diluted weighted average shares outstanding

 

 

260.4

 

 

 

258.6

 

 

 

260.2

 

 

 

259.1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Basic earnings per share attributable to common

   stockholders

 

$

0.69

 

 

$

0.98

 

 

$

1.80

 

 

$

2.15

 

Diluted earnings per share attributable to common

   stockholders

 

$

0.69

 

 

$

0.98

 

 

$

1.79

 

 

$

2.13