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 9 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Share-Based Compensation.        
Share-based compensation costs (income) $ 1.1 $ (1.0) $ 6.2 $ 5.0
Less impact of income tax benefit (expense) 0.4 (0.4) 2.3 1.8
Share-based compensation costs (income), net of tax $ 0.7 $ (0.6) $ 3.9 $ 3.2
Performance-based targets for each grant period     3 years  
Stock based compensation        
Increase in number of shares issuable under stock compensation plans     3,900,000  
Time-Based stock awards
       
Stock based compensation        
Granted (in shares)     60,154  
Weighted average fair value of equity instruments other than options (in dollars per share)     $ 29.30  
Performance-based stock awards (maximum that can be earned)
       
Stock based compensation        
Granted (in shares)     582,391  
Weighted average fair value of equity instruments other than options (in dollars per share)     $ 28.56  
Shares granted included in performance-based stock awards whose payout level is based upon the Company's total shareholder return     187,847  
Performance measurement period used to determined shares granted included in performance-based stock awards     3 years  
Stock options
       
Stock based compensation        
Granted (in shares)     455,922  
Weighted average exercise price (in dollars per share)     $ 28.18  
Weighted average fair value of options granted (in dollars per share)     $ 6.97