Financial Instruments and Risk Management (Schedule of Gains and Losses on Derivative Instruments) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Derivative Instruments, Gain (Loss) [Line Items]
OCI Cash flow hedges reclass to earnings, before tax	$ (0.1)	$ 0.5
FX contract | Not designated as hedge
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in income	0.6	0.9
FX contract | Cash flow hedge | Designated as hedge
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized Gain (Loss) on Interest Rate Cash Flow Hedges, Pretax, Accumulated Other Comprehensive Income (Loss)	$ 2.1	$ 7.7