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Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Sep. 30, 2021
Unsecured Debt	$ 451.6	$ 452.2
Debt Issuance Costs, Net	(5.6)
Current portion of long-term debt	(0.8)	(1.0)
Long-term debt, excluding current maturities	446.1	445.9
Revolving Credit Facility [Member]
Debt Issuance Costs, Net	(0.7)
Secured Debt [Member]
Debt Issuance Costs, Net	(4.7)	(5.3)
Other [Member]
Unsecured Debt	1.6	2.2
Unsecured Debt [Member]
Debt Issuance Costs, Net	(4.6)
Unsecured Debt [Member] | 4.0% Senior Notes
Unsecured Debt	450.0
5.5% Senior Notes	$ 450.0	450.0
Unsecured Debt [Member] | 5.5% Senior Notes
Unsecured Debt		$ 450.0

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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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