Restructuring Charges (Narrative) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 17,100,000	$ 16,200,000	$ 30,100,000
Restructuring and Related Cost, Expected Cost	19
Project Fuel
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred to date		163,700,000
Obsolescence | Cost of products sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs			600,000
IT enablement | Selling, general and administrative expense
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	300,000	900,000	$ 8,700,000
IT enablement | Cost of products sold
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 200,000	$ 0