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Product Warranty Obligations (Tables)
9 Months Ended
Jun. 30, 2011
Product Warranty Obligations [Abstract]  
Product Warranty Obligations
                 
    Nine Months Ended  
    June 30,  
    2011     2010  
 
               
Balance at beginning of period
  $ 37.3     $ 32.1  
Warranties recorded at time of sale
    27.3       30.6  
Adjustments to pre-existing warranties
    (3.0 )     (1.2 )
Settlements of warranty claims
    (24.2 )     (25.3 )
 
           
 
               
Balance at end of period
  $ 37.4     $ 36.2