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Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Debt Issuance Costs, Net	$ 4.6
Current portion of long-term debt	0.7	$ 0.8
Long-term debt, excluding current maturities	446.7	446.1
Long-term Debt, Gross	451.3	451.6
Revolving Credit Facility [Member]
Debt Issuance Costs, Net	0.5
Other [Member]
Finance Lease, Liability	1.3	1.6
Unsecured Debt [Member]
5.5% Senior Notes	450.0	450.0
Debt Issuance Costs, Net	3.9	$ 4.7
Long-term Debt, Gross	$ 450.0
Unsecured Debt [Member] | 5.5% Senior Notes
Unsecured Debt			$ 450.0

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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