Supplemental Financial Statement Information (Schedule Of Allowance For Doubtful Accounts) (Details) - Allowance for Doubtful Accounts - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Allowance for Doubtful Accounts
Balance at beginning of year	$ 4.6	$ 2.9	$ 2.9
Provision charged to expense, net of reversals	1.5	1.9	(0.4)
Write-offs, less recoveries, translation, other	(0.4)	(0.2)	0.4
Balance at end of year	$ 5.7	$ 4.6	$ 2.9