Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Property, net

	September 30,
	2021		2020
Land and land improvements	$	0.8	$	0.8
Buildings and leasehold improvements	5.5		5.4
Machinery and equipment	12.6		14.2
Software	2.1		1.9
Construction in progress	0.6		0.3
	21.6		22.6
Accumulated depreciation	(12.7)		(12.4)
Property, net	$	8.9	$	10.2

Carrying amount of goodwill

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

Schedule of finite-lived intangible assets

	September 30, 2021						September 30, 2020
	Carrying Amount		Accumulated Amortization		Net Amount		Carrying Amount		Accumulated Amortization		Net Amount
Customer relationships	$	178.6	$	(75.3)	$	103.3	$	209.4	$	(76.9)	$	132.5
Trademarks and brands	195.1		(75.3)		119.8		213.4		(71.6)		141.8
Other intangible assets	3.1		(3.1)		—		3.1		(3.1)		—
Intangible assets, net	$	376.8	$	(153.7)	$	223.1	$	425.9	$	(151.6)	$	274.3

Impact from ASC 606 adoption

	Year Ended September 30, 2019
	As Reported Under ASC Topic 606		As Reported Under Prior Guidance		Impact of Adoption
Net Sales	$	854.4	$	863.2	$	(8.8)
Cost of goods sold	542.6		542.6		—
Gross Profit	311.8		320.6		(8.8)
Selling, general and administrative expenses	127.1		135.9		(8.8)
Amortization of intangible assets	22.2		22.2		—
Operating Profit	$	162.5	$	162.5	$	—