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Product Warranty Obligations (Tables)
 3 Months Ended
Dec. 31, 2014
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability
Changes in product warranty obligations for the three months ended December 31, 2014 and 2013 are (in millions):
 
Three Months Ended
December 31,
 
2014
 
2013
Balance at beginning of period
$
34.1

 
$
36.9

Accruals for warranties issued during the current period
6.9

 
7.7

Adjustments to pre-existing warranties
0.5

 
—

Settlements of warranty claims
(7.9
)
 
(8.0
)
Balance at end of period
$
33.6

 
$
36.6