Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2025

Accounting Policies [Abstract]

Property, net

	September 30,
	2025		2024
Land and land improvements	$	0.8	$	0.8
Buildings and leasehold improvements	5.5		4.5
Machinery and equipment	15.5		14.3
Software	1.4		1.2
Construction in progress	10.0		0.6
	33.2		21.4
Accumulated depreciation	(14.2)		(12.2)
Property, net	$	19.0	$	9.2

Carrying amount of goodwill

Goodwill, gross	$	180.7
Accumulated impairment losses	(114.8)
Goodwill	$	65.9

Schedule of finite-lived intangible assets

	September 30, 2025						September 30, 2024
	Carrying Amount		Accumulated Amortization		Net Amount		Carrying Amount		Accumulated Amortization		Net Amount
Customer relationships	$	160.8	$	(103.4)	$	57.4	$	160.7	$	(94.6)	$	66.1
Trademarks and brands	164.5		(96.9)		67.6		164.4		(88.7)		75.7
Other intangible assets	3.1		(3.1)		—		3.1		(3.1)		—
Intangible assets, net	$	328.4	$	(203.4)	$	125.0	$	328.2	$	(186.4)	$	141.8