Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2022

Accounting Policies [Abstract]

Property, net

	September 30,
	2022		2021
Land and land improvements	$	0.7	$	0.8
Buildings and leasehold improvements	5.4		5.5
Machinery and equipment	12.6		12.6
Software	2.3		2.1
Construction in progress	0.5		0.6
	21.5		21.6
Accumulated depreciation	(13.5)		(12.7)
Property, net	$	8.0	$	8.9

Carrying amount of goodwill

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

Schedule of finite-lived intangible assets

	September 30, 2022						September 30, 2021
	Carrying Amount		Accumulated Amortization		Net Amount		Carrying Amount		Accumulated Amortization		Net Amount
Customer relationships	$	178.3	$	(84.9)	$	93.4	$	178.6	$	(75.3)	$	103.3
Trademarks and brands	195.1		(85.2)		109.9		195.1		(75.3)		119.8
Other intangible assets	3.1		(3.1)		—		3.1		(3.1)		—
Intangible assets, net	$	376.5	$	(173.2)	$	203.3	$	376.8	$	(153.7)	$	223.1

Impact from ASC 606 adoption