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Earnings Per Share (Tables)
 6 Months Ended
Mar. 31, 2022
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

 

 

Six Months Ended

 

 

 

March 31,

 

 

March 31,

 

 

 

2022

 

 

2021

 

 

2022

 

 

2021

 

Numerator:

 

 

 

 

 

 

 

 

 

 

 

 

Net income attributable to common stockholders

 

$

39.9

 

 

$

112.5

 

 

$

222.2

 

 

$

264.5

 

Less: Distributed and undistributed income
   available to participating securities

 

 

(0.1

)

 

 

(0.1

)

 

 

(0.1

)

 

 

(0.1

)

Distributed and undistributed income available to
   common stockholders

 

$

39.8

 

 

$

112.4

 

 

$

222.1

 

 

$

264.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Denominator:

 

 

 

 

 

 

 

 

 

 

 

 

Basic weighted average shares outstanding

 

 

263.4

 

 

 

264.9

 

 

 

264.0

 

 

 

263.8

 

Effect of dilutive stock options and non-
   participating securities

 

 

1.9

 

 

 

2.1

 

 

 

2.1

 

 

 

2.1

 

Diluted weighted average shares outstanding

 

 

265.3

 

 

 

267.0

 

 

 

266.1

 

 

 

265.9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Basic earnings per share attributable to common
   stockholders

 

$

0.15

 

 

$

0.42

 

 

$

0.84

 

 

$

1.00

 

Diluted earnings per share attributable to
   common stockholders

 

$

0.15

 

 

$

0.42

 

 

$

0.83

 

 

$

0.99