Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

v2.4.0.6
Earnings Per Share (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Income per common share        
Net income basic and diluted $ 21.3 $ 22.5 $ 80.0 $ 82.6
Weighted average shares outstanding - basic (in shares) 62.3 62.1 62.1 62.0
Effect of dilutive stock options and unvested time based restricted stock awards 0.2   0.3  
Weighted average shares outstanding - diluted (in shares) 62.5 62.1 62.4 62.0
Restricted stock units and stock option awards
       
Income per common share        
Stock-based awards excluded from the computation of diluted earnings per share (in shares)     2.0 2.0
Performance-based stock awards
       
Income per common share        
Stock-based awards excluded from the computation of diluted earnings per share as related performance period is not yet complete (in shares)     1.8 1.7