Restructuring and Other Costs - Schedule of Acquisition, Integration and Divestiture Costs (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Restructuring Cost And Reserve [Line Items]
Acquisition costs			$ 1.9	$ 0.4
Integration costs			0.4	1.1
Divestiture costs			0.8	0.6
Other total	$ 2.4	$ (0.1)	3.1	2.1
Other Segments [Member]
Restructuring Cost And Reserve [Line Items]
Acquisition costs	1.5	(0.3)	1.9	0.4
Integration costs	0.2	(0.2)	0.4	1.1
Divestiture costs	0.7	0.4	0.8	0.6
Other total	$ 2.4	$ (0.1)	$ 3.1	$ 2.1

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