Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2023

Accounting Policies [Abstract]

Property, net

	September 30,
	2023		2022
Land and land improvements	$	0.7	$	0.7
Buildings and leasehold improvements	5.6		5.4
Machinery and equipment	14.1		12.6
Software	2.4		2.3
Construction in progress	1.2		0.5
	24.0		21.5
Accumulated depreciation	(15.5)		(13.5)
Property, net	$	8.5	$	8.0

Carrying amount of goodwill

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

Schedule of finite-lived intangible assets

	September 30, 2023						September 30, 2022
	Carrying Amount		Accumulated Amortization		Net Amount		Carrying Amount		Accumulated Amortization		Net Amount
Customer relationships	$	178.4	$	(97.2)	$	81.2	$	178.3	$	(84.9)	$	93.4
Trademarks and brands	194.0		(98.4)		95.6		195.1		(85.2)		109.9
Other intangible assets	3.1		(3.1)		—		3.1		(3.1)		—
Intangible assets, net	$	375.5	$	(198.7)	$	176.8	$	376.5	$	(173.2)	$	203.3