Financial Instruments and Risk Management (Schedule of Fair Values of Derivative Instruments) (Details) - FX contract - USD ($) $ in Millions |
Mar. 31, 2025 |
Sep. 30, 2024 |
|---|---|---|
| Not designated as hedge | ||
| Derivatives, Fair Value [Line Items] | ||
| Estimated fair value of derivatives | $ 0.0 | $ 0.1 |
| Cash flow hedge | Designated as hedge | ||
| Derivatives, Fair Value [Line Items] | ||
| Estimated fair value of derivatives | $ 0.7 | $ (2.4) |