Segment and Geographical Data (Schedule of Geographical Segment Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 2,223.5	$ 2,253.7	$ 2,251.6
Long-Lived Assets	432.6	379.9
Property, plant and equipment, net	369.3	349.1
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,204.1	1,261.8	1,326.1
Long-Lived Assets	223.7	227.9
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	1,019.4	991.9	$ 925.5
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	100.3	70.3
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 108.6	$ 81.7