Restructuring Charges (Schedule of Charges Related to Restructuring Activities) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 1.1	$ 1.9	$ 5.0	$ 2.8
Other Restructuring Costs	1.9	1.1	4.7	3.0
Restructuring and related costs	3.2	3.2	10.0	6.0
Restructuring Reserve	2.1		2.1		$ 4.6
Asset Impairment and Accelerated Depreciation	$ 0.2	0.2	$ 0.3	0.2
Restructuring Charges, including amounts included in Cost of Products Sold		0.2		0.2
Restructuring Charges, Including Amounts in Selling, General and Administrative Expenses		$ 0.0		0.1
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Restructuring Charges, Including Amounts in Selling, General and Administrative Expenses				$ 0.1