Accumulated Other Comprehensive Loss (Schedule of Reclassifications out of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
OCI Cash flow hedges reclass to earnings, before tax	$ (0.1)	$ 0.5
Reclassifications to earnings	(0.5)	(0.1)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
OCI Cash flow hedge, reclassification to earnings, tax	(0.1)	0.1
Other comprehensive income, reclassification to earnings, cash flow hedges, after tax	0.0	0.4
Amortization of defined benefit pension and postretirement items, actuarial losses, before tax	(0.7)	(0.6)
Amortization of defined benefit pension and postretirement items, tax	(0.2)	(0.1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax, Total	0.5	0.5
Reclassifications to earnings	(0.5)	(0.1)
Other expense (income), net | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
OCI Cash flow hedges reclass to earnings, before tax	$ (0.1)	$ 0.5