Segment Data Segment Data (Schedule of Sales by Geographical Area) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenue from External Customer [Line Items]
Net sales	$ 488.9	$ 469.1
United States
Revenue from External Customer [Line Items]
Net sales	254.2	271.8
International
Revenue from External Customer [Line Items]
Net sales	$ 234.7	$ 197.3