Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Unsecured Debt	$ 452.5	$ 452.1
Debt Issuance Costs, Net	(6.2)
Current portion of long-term debt	(1.1)	(0.9)
Long-term debt, excluding current maturities	446.5	445.4
Revolving Credit Facility [Member]
Unsecured Debt	0.0	0.0
Debt Issuance Costs, Net	(1.3)
Secured Debt [Member]
Debt Issuance Costs, Net	(4.9)	(5.8)
Other [Member]
Unsecured Debt	2.5	2.1
Unsecured Debt [Member]
Unsecured Debt		450.0
5.5% Senior Notes	450.0	$ 450.0
Debt Issuance Costs, Net	$ (4.9)

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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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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