Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024	May 28, 2021
Total debt	$ 454.1	$ 452.7
Less deferred financing costs	3.5
Current portion of long-term debt	1.2	0.8
Long-term debt	450.4	448.7
Unsecured Debt [Member]
Senior notes	450.0	450.0
Total debt			$ 450.0
Less deferred financing costs	2.5	3.2
Other [Member]
Finance leases	$ 4.1	$ 2.7