Segment and Geographical Data (Schedule of Geographical Segment Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 534.1	$ 650.0	$ 598.4	$ 469.1	$ 536.9	$ 623.8	$ 547.7	$ 463.3	$ 2,251.6	$ 2,171.7	$ 2,087.3
Long-Lived Assets	371.0				366.1				371.0	366.1
Property, plant and equipment, net	337.9				345.5				337.9	345.5
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,326.1	1,306.5	1,183.6
Long-Lived Assets	221.6				239.3				221.6	239.3
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									925.5	865.2	$ 903.7
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	73.7				61.1				73.7	61.1
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-Lived Assets	$ 75.7				$ 65.7				$ 75.7	$ 65.7