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Product Warranties
 6 Months Ended
Mar. 31, 2018
Guarantees [Abstract]  
Product Warranties
Product Warranties
Product warranty activity was as follows:
 
 
Balance at
Beginning of
Period
 
Provisions
 
Acquired
 
Settlements/
Adjustments
 
Balance at
End of Period
Six Months Ended:
 
 
 
 
 
 
 
 
 
March 31, 2018
$
17.0

 
$
8.4

 
$
—

 
$
(9.6
)
 
$
15.8

April 1, 2017
$
5.0

 
$
4.6

 
$
9.9

 
$
(4.1
)
 
$
15.4