Accumulated Other Comprehensive Loss (Schedule of Reclassifications out of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 30, 2024		Sep. 30, 2023	Sep. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Deferred gain (loss) on hedging activity, net of tax		$ 4.6		$ 4.8	$ (5.5)
Reclassification to earnings		2.9		1.4
Gain (Loss) from Litigation Settlement		3.9		(6.3)	(7.5)	[1]
intellectual property claim against a third party
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (Loss) from Litigation Settlement				4.9	$ 7.5
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
OCI gain (loss) on cash flow hedge, reclassification before tax		5.9		8.0
OCI gain (loss) on cash flow hedge, reclassification, tax		1.9		2.5
Deferred gain (loss) on hedging activity, net of tax		4.0		5.5
Amortization of defined benefit pension and postretirement items, actuarial losses, before tax		(1.5)	[2]	(1.4)
Amortization or settlement recognition of net (loss) gain	[2]	0.0		(7.9)
Amortization of defined benefit pension and postretirement items, tax		(0.4)		(2.4)
Amortization of defined benefit pension and postretirement items, after tax		(1.1)		(6.9)
Reclassification to earnings		$ 2.9		$ (1.4)

[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.

[2] These AOCI components are included in the computation of net periodic benefit cost. See Note 14 of Notes to Consolidated Financial Statements.