Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Commitments And Contingencies [Abstract]
Estimated costs associated with environmental remediation activities	$ 12.2	$ 4.0
Product liability accruals	9.2	9.8
Product warranty accruals	7.2	7.8
Inventory write-offs associated with product safety recall		4.1	$ 15.0
Customer losses, returned or disposed product		2.0	7.1
Incremental costs to dispose of product and operational expenses	$ 0.7	$ 12.9	$ 13.7