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Supplemental Statement of Operations Information (Tables)
 12 Months Ended
Sep. 30, 2019
Supplemental Income Statement Elements [Abstract]  
Schedule of Operations, Supplemental Disclosures [Table Text Block]
Selected supplemental statement of operations information is presented below.
 
2019
 
2018
 
2017
 
(in millions)
Included in selling, general and administrative expenses:
 
 
 
 
 
Research and development
$
14.3

 
$
11.6

 
$
12.1

Advertising
7.1

 
7.1

 
5.2

Interest expense, net:
 
 
 
 
 
5.5% Senior Notes
$
24.8

 
$
7.5

 
$
—

Term Loan
—

 
14.4

 
19.1

Deferred financing costs amortization
1.2

 
1.6

 
1.8

ABL Agreement
0.6

 
0.6

 
0.8

Interest rate swap contracts
—

 
0.6

 
1.9

   Capitalized interest
(3.0
)
 
—

 
—

Other interest expense
(0.2
)
 
0.6

 
0.6

 
23.3

 
25.3

 
24.2

Interest income
(3.5
)
 
(4.4
)
 
(2.0
)
 
$
19.8

 
$
20.9

 
$
22.2