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Borrowing Arrangements (Components Of Long-Term Debt) (Details) - USD ($) $ in Millions	Jun. 30, 2021	May 28, 2021	Sep. 30, 2020	Jun. 12, 2018
Debt instrument	$ 452.1		$ 452.5
Deferred financing costs	(5.5)		(4.9)
Current portion of long-term debt	(1.0)		(1.1)
Long-term debt	445.6		446.5
Other [Member]
Debt instrument	2.1		2.5
4.0% Senior Notes [Member]
5.5% Senior Notes		$ 450.0
4.0% Senior Notes [Member] | Senior Notes
5.5% Senior Notes	450.0		0.0
5.5% Notes
5.5% Senior Notes				$ 450.0
5.5% Notes | Senior Notes
5.5% Senior Notes	$ 0.0		$ 450.0

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- Definition

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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