Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

 v2.3.0.11
Stock-Based Compensation (Details) (USD $)
In Millions, except Share data
3 Months Ended 9 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Stock-Based Compensation        
Stock-based compensation costs $ 2.3 $ 2.4 $ 8.5 $ 7.4
Income tax benefit 0.8 0.9 3.2 2.7
Stock-based compensation costs, net-of-tax $ 1.5 $ 1.5 $ 5.3 $ 4.7
Restricted stock units (RSUs)
       
Restricted stock units (RSUs) and Performance-based stock units (PBUs)        
Granted (in shares)     99,631  
Weighted average grant date fair value (in dollars per share)     $ 21.61  
Performance-based stock units (PBUs, maximum that can be earned)
       
Restricted stock units (RSUs) and Performance-based stock units (PBUs)        
Granted (in shares)     587,481  
Weighted average grant date fair value (in dollars per share)     $ 19.66  
Stock options
       
Restricted stock units (RSUs) and Performance-based stock units (PBUs)        
Granted (in shares)     555,679  
Weighted average exercise price (in dollars per share) $ 19.78   $ 19.78