Segment Data Segment Data (Schedule of Sales by Geographical Area) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue from External Customer [Line Items]
Net sales	$ 627.2	$ 647.8	$ 1,686.3	$ 1,736.1
United States
Revenue from External Customer [Line Items]
Net sales	344.7	373.7	928.0	983.0
International
Revenue from External Customer [Line Items]
Net sales	$ 282.5	$ 274.1	$ 758.3	$ 753.1