Financial Instruments and Risk Management (Schedule of Fair Values of Derivative Instruments) (Details) - FX contract - USD ($) $ in Millions |
Dec. 31, 2022 |
Sep. 30, 2022 |
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|---|---|---|---|---|
| Not designated as hedge | ||||
| Derivatives, Fair Value [Line Items] | ||||
| Estimated fair value of derivatives | [1] | $ (2.7) | $ 2.0 | |
| Cash flow hedge | Designated as hedge | ||||
| Derivatives, Fair Value [Line Items] | ||||
| Estimated fair value of derivatives | [1] | $ (0.7) | $ 11.3 | |
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