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Earnings Per Common Share (Tables)
12 Months Ended
Sep. 30, 2011
Earnings Per Common Share 
Calculated Earnings Per Share
   
Years Ended September 30
 
   
2011
   
2010
   
2009
 
                   
Net income (loss) attributable to common shareholders
  $ 133.3     $ 125.3     $ (405.0 )
                         
Average shares outstanding - Basic
    63,164       62,934       62,581  
Add potential effect of exercise of stock options
                       
and other unvested equity awards
    735       805       -  
Average shares outstanding - Diluted
    63,899       63,739       62,581  
                         
Net Income (Loss) Attributable to Common Shareholders
                       
per Common Share - Basic
  $ 2.11     $ 1.99     $ (6.47 )
                         
Net Income (Loss) Attributable to Common Shareholders
                       
per Common Share - Diluted
  $ 2.09     $ 1.97     $ (6.47 )