Commitments and Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Legal settlement	$ (3.9)	$ 6.3	$ 7.5	[1]
SKU rationalization charges	0.0	1.7	(22.5)
Loss Contingencies [Line Items]
Gain (Loss) from Litigation Settlement	3.9	(6.3)	(7.5)	[1]
Other Commitments [Line Items]
Gain (Loss) from Litigation Settlement	3.9	(6.3)	(7.5)	[1]
AccruedEnvironmentalLiability	7.9	9.3
Gain Contingencies [Line Items]
Gain (Loss) from Litigation Settlement	$ 3.9	(6.3)	(7.5)	[1]
VAT matter
Commitments and Contingencies Disclosure [Abstract]
Legal settlement		(2.2)
Loss Contingencies [Line Items]
Gain (Loss) from Litigation Settlement		2.2
Other Commitments [Line Items]
Gain (Loss) from Litigation Settlement		2.2
Gain Contingencies [Line Items]
Gain (Loss) from Litigation Settlement		2.2
intellectual property claim against a third party
Commitments and Contingencies Disclosure [Abstract]
Legal settlement		(4.9)	(7.5)
Loss Contingencies [Line Items]
Gain (Loss) from Litigation Settlement		4.9	7.5
Other Commitments [Line Items]
Gain (Loss) from Litigation Settlement		4.9	7.5
Gain Contingencies [Line Items]
Gain (Loss) from Litigation Settlement		$ 4.9	$ 7.5

[1] Includes pre-tax SG&A of $3.9 for fiscal 2024 for the settlement of certain legal matters. Includes pre-tax income in SG&A of $$6.3, net of other costs of $0.8, in fiscal 2023 related to the favorable resolution of legal matters. (7)Includes pre-tax loss of $3.1 for fiscal 2024, on an equity method investment and a related note receivable as a result of a new contractual agreement. (8)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.