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Share-Based Compensation (Tables)
9 Months Ended
Jun. 30, 2013
Share-Based Compensation [Abstract]  
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
Share-based compensation cost recognized in the consolidated income statement is summarized below:
               
   Three Months Ended   Nine Months Ended 
   30 June   30 June 
   2013  2012   2013  2012 
 Before-Tax Share-Based Compensation Cost$ 10.6 $ 8.8  $ 33.0 $ 36.2 
 Income tax benefit  (3.8)   (3.1)    (11.9)   (13.0) 
 After-Tax Share-Based Compensation Cost$ 6.8 $ 5.7  $ 21.1 $ 23.2 
               
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
    
 Expected volatility28.6%–30.4%
 Expected dividend yield2.4%
 Expected life (in years)7.3–9.1 
 Risk-free interest rate1.2%–1.5%