Financial Instruments and Risk Management (Schedule of Offsetting Assets and Liabilities) (Details) - FX contract - USD ($) $ in Millions	Jun. 30, 2024	Sep. 30, 2023
Derivative [Line Items]
Gross amounts of recognized assets	$ 4.7	$ 6.1
Gross amounts of recognized liabilities	(0.2)	(0.7)
Gross amounts offset in the balance sheet	0.0	(0.2)
Gross amounts offset in the balance sheet	0.0	0.4
Net amounts of assets presented in the balance sheet	4.7	5.9
Net amounts of liabilities presented in the balance sheet	$ (0.2)	$ (0.3)

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