Other Expenses (Tables)

12 Months Ended

Sep. 30, 2021

Other Expenses [Abstract]

Schedule of Other Operating Cost and Expense, by Component

Other expenses consisted of the following, for the periods indicated.

	Year Ended September 30,
(in millions)	2021		2020		2019
Insurance	$	7.1	$	4.7	$	3.4
Office supplies and printing	1.3		1.8		1.9
Other clearing related expenses	4.0		2.8		2.5
Other non-income taxes	14.8		6.6		4.6
Contingent consideration, net	1.1		0.5		—
Other	18.0		13.2		10.8
Total other expenses	$	46.3	$	29.6	$	23.2