Segment Data Segment Data (Schedule of Sales by Geographical Area) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue from External Customer [Line Items]
Net sales	$ 647.8	$ 650.0	$ 1,736.1	$ 1,717.5
United States
Revenue from External Customer [Line Items]
Net sales	373.7	391.6	983.0	1,031.3
International
Revenue from External Customer [Line Items]
Net sales	$ 274.1	$ 258.4	$ 753.1	$ 686.2