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Other Expenses (Notes)
 6 Months Ended
Mar. 31, 2018
Other Expenses [Abstract]  
Other Expenses [Text Block]
Other Expenses
Other expenses for the three and six months ended March 31, 2018 and 2017 consisted of the following:
 
Three Months Ended March 31,
 
Six Months Ended March 31,
(in millions)
2018
 
2017
 
2018
 
2017
Contingent consideration, net
$
—

 
$
0.1

 
$
—

 
$
0.1

Insurance
0.6

 
0.8

 
1.2

 
1.3

Advertising, meetings and conferences
3.4

 
1.2

 
4.3

 
2.1

Office supplies and printing
0.4

 
0.5

 
0.8

 
1.1

Other clearing related expenses
0.5

 
0.3

 
1.0

 
0.7

Other non-income taxes
1.3

 
1.2

 
2.5

 
2.3

Other
2.5

 
2.5

 
4.6

 
4.6

Total other expenses
$
8.7

 
$
6.6

 
$
14.4

 
$
12.2