Restructuring Charges (Schedule of Charges Related to Restructuring Activities) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 1.3
Other Restructuring Costs	0.9
Total restructuring	$ 2.2	$ 4.4
Project Fuel
Restructuring Cost and Reserve [Line Items]
Severance Costs		2.3
Asset Impairment and Accelerated Depreciation		0.1
Other Restructuring Costs		2.0
Total restructuring		4.4
IT enablement | Project Fuel | Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Total restructuring		$ 0.6