v3.26.1
Financial Instruments and Risk Management (Schedule of Fair Values of Derivative Instruments) (Details) - FX contract - USD ($)
$ in Millions
Mar. 31, 2026
Sep. 30, 2025
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 $ 2.6 $ (1.4)