Accumulated Other Comprehensive Loss (Schedule of Reclassifications out of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Sep. 30, 2022	Sep. 30, 2023		Sep. 30, 2022	Sep. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Deferred gain (loss) on hedging activity, net of tax			$ 4.8		$ (5.5)	$ (4.3)
Reclassification to earnings			(1.4)		(1.7)
Gain (Loss) Related to Litigation Settlement			(6.3)		(7.5)	$ 0.0	[1]
intellectual property claim against a third party
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (Loss) Related to Litigation Settlement		$ 7.5	4.9
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			8.0		11.2
OCI gain (loss) on cash flow hedge, reclassification, tax			2.5		3.6
Deferred gain (loss) on hedging activity, net of tax			5.5		7.6
Amortization of defined benefit pension and postretirement items, actuarial losses, before tax			(1.4)	[2]	(6.1)
Amortization or settlement recognition of net (loss) gain	[2]		(7.9)		(1.8)
Amortization of defined benefit pension and postretirement items, tax			(2.4)		(2.0)
Amortization of defined benefit pension and postretirement items, after tax			(6.9)		(5.9)
Reclassification to earnings			$ (1.4)		$ 1.7

[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.

[2] These AOCI components are included in the computation of net periodic benefit cost. See Note 12 of Notes to Consolidated Financial Statements.