Financial Instruments and Risk Management (Schedule of Fair Values of Derivative Instruments) (Details) - FX contract - USD ($) $ in Millions		Sep. 30, 2023	Sep. 30, 2022
Not designated as hedging instrument
Derivatives, Fair Value [Line Items]
Estimated fair value of derivatives	[1]	$ 0.9	$ 2.0
Cash flow hedging | Designated as hedging instrument
Derivatives, Fair Value [Line Items]
Estimated fair value of derivatives	[1]	$ 4.4	$ 11.3

[1] All derivative assets are presented in Other current assets or Other assets. All derivative liabilities are presented in Other current liabilities or Other liabilities.