Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation (Details)

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Share-Based Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Share-Based Compensation    
Share-based compensation costs $ 5.3 $ 2.5
Income tax benefit 2.0 0.9
Share-based compensation costs, net-of-tax $ 3.3 $ 1.6
Stock options
   
Restricted stock units (RSUs) and Performance-based stock units (PBUs)    
Granted (in shares) 504,440  
Weighted average exercise price (in dollars per share) $ 22.26  
Time-Based stock awards
   
Restricted stock units (RSUs) and Performance-based stock units (PBUs)    
Granted (in shares) 2,214  
Weighted average grant date fair value (in dollars per share) $ 18.62  
Performance-based stock awards (maximum that can be earned)
   
Restricted stock units (RSUs) and Performance-based stock units (PBUs)    
Granted (in shares) 662,051  
Weighted average grant date fair value (in dollars per share) $ 22.26