Restructuring and Other Costs - Schedule of Acquisition, Integration and Divestiture Costs (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Restructuring Cost And Reserve [Line Items]
Acquisition costs			$ 0.4	$ 0.7
Integration costs			0.2	1.3
Divestiture costs			0.1	0.2
Other total	$ 0.5	$ 1.1	0.7	2.2
Other Segments [Member]
Restructuring Cost And Reserve [Line Items]
Acquisition costs	0.2	0.5	0.4	0.7
Integration costs	0.2	0.4	0.2	1.3
Divestiture costs	0.1	0.2	0.1	0.2
Other total	$ 0.5	$ 1.1	$ 0.7	$ 2.2

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=123586518&loc=d3e1043-128460

Name:	us-gaap_BusinessCombinationAcquisitionRelatedCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration