Other Expenses (Tables)

12 Months Ended

Sep. 30, 2023

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)	2023		2022		2021
Non-income taxes	$	16.8	$	13.5	$	14.8
Insurance	11.1		10.8		7.1
Employee related expenses	10.1		9.6		7.0
Other direct business expenses	14.8		10.0		6.3
Membership fees	3.4		3.3		2.8
Director and public company expenses	2.3		1.8		1.5
Office expenses	1.9		1.7		1.3
Other expenses	6.0		9.9		5.5
Total other expenses	$	66.4	$	60.6	$	46.3