v3.25.4
Financial Instruments and Risk Management - Derivative Instruments, Gain (Loss) (Details) - Not Designated as Hedging Instrument - Foreign currency contracts - USD ($)
$ in Millions
3 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Sep. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]      
Estimated Fair Value Liability $ 0.2   $ (0.5)
Gain (Loss) Recognized in Income $ (0.9) $ (8.4)