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Product Warranty Obligations (Tables)
 12 Months Ended
Sep. 30, 2014
Product Warranties Disclosures [Abstract]  
Changes in the product warranty obligations
Changes in product warranty obligations are (in millions):
 
 
September 30,
 
 
2014
 
2013
Balance at beginning of period
 
$
36.9

 
$
37.8

Warranties recorded at time of sale
 
31.3

 
32.0

Adjustments to pre-existing warranties
 
(5.3
)
 
0.8

Settlements of warranty claims
 
(28.8
)
 
(33.7
)
Balance at end of period
 
$
34.1

 
$
36.9