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Earnings Per Share Earnings Per Share (Tables)
 3 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
Three Months Ended December 31,
 
2013
 
2012
Income from continuing operations
$
54.9

 
$
46.3

Income from discontinued operations
—

 
0.2

Net income
54.9

 
46.5

Earnings allocated to participating securities
(0.2
)
 
(0.3
)
Earnings available to common shareholders
$
54.7

 
$
46.2

 
 
 
 
Basic EPS:
 
 
 
Weighted-average common shares outstanding
85,312,326

 
90,303,191
 
 
 
 
Diluted EPS:
 
 
 
Basic weighted-average common shares outstanding
85,312,326

 
90,303,191

Dilutive stock options and other equity-based compensation awards
1,607,395

 
878,606

Participating restricted stock
(193,181
)
 
(122,859
)
Diluted weighted-average common shares outstanding
86,726,540

 
91,058,938
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
The shares included in the following table were not included in the computation of diluted earnings per share attributable to common shareholders because the exercise price of the options was greater than the average market price of the shares of Common Stock and therefore would have been anti-dilutive.
 
 
Three Months Ended December 31,
 
 
2013
 
2012
Stock options
 
638,200

 
2,087,728