Income Taxes (Schedule of Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Components of Deferred Tax Liabilities [Abstract]
Property, plant and equipment	$ (14.2)	$ (18.3)
Intangibles	(220.0)	(229.3)
Leasing assets	20.0	23.1
Other tax liabilities	(0.2)	(7.3)
Gross deferred tax liabilities	(254.4)	(278.0)
Components of Deferred Tax Assets [Abstract]
Accrued liabilities	50.8	54.2
Deferred and share-based compensation	14.5	14.4
Tax loss carryforwards and tax credits	69.4	51.1
Postretirement benefits other than pensions	0.9	1.3
Pension plans	12.9	28.0
Inventory differences	5.1	5.9
Lease liability	19.8	23.3
Deferred revenue	1.0	4.2
Other tax assets	7.3	9.4
Gross deferred tax assets	181.7	191.8
Valuation allowance	(20.9)	(21.5)
Net deferred tax liabilities	$ (93.6)	$ (107.7)