Commitments and Contingencies (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Legal settlement			$ 6.3	$ 7.5	$ 0.0	[1]
SKU rationalization charges			1.7	(22.5)	0.0
Loss Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement			(6.3)	(7.5)	0.0	[1]
Other Commitments [Line Items]
Gain (Loss) Related to Litigation Settlement			(6.3)	(7.5)	0.0	[1]
AccruedEnvironmentalLiability	$ 9.3		9.3
Gain Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement			(6.3)	$ (7.5)	$ 0.0	[1]
VAT matter
Commitments and Contingencies Disclosure [Abstract]
Legal settlement	(2.2)
Loss Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement	2.2
Other Commitments [Line Items]
Gain (Loss) Related to Litigation Settlement	2.2
Gain Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement	$ 2.2
intellectual property claim against a third party
Commitments and Contingencies Disclosure [Abstract]
Legal settlement		$ (7.5)	(4.9)
Loss Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement		7.5	4.9
Other Commitments [Line Items]
Gain (Loss) Related to Litigation Settlement		7.5	4.9
Gain Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement		$ 7.5	$ 4.9

[1] Includes pre-tax SG&A of $6.3 and $7.5 for fiscal 2023 and 2022, respectively, related to the resolution of legal matters. See Note 17 of the Notes to Consolidated Financial Statements. (6)Includes pre-tax SG&A of $3.4 for the fiscal 2022 related to the estimated settlement of prior years’ value-added tax audits in Germany.