Property, Plant, and Equipment (Schedule of Property, Plant and Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Sep. 30, 2025
Property, Plant and Equipment [Line Items]
Land	$ 16.7	$ 16.7
Buildings and Improvements, Gross	116.2	114.8
Machinery and Equipment, Gross	980.4	984.4
Capitalized Computer Software, Gross	68.5	68.2
Construction in Progress, Gross	70.9	62.1
Property, Plant and Equipment, Gross	1,252.7	1,246.2
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(960.2)	(951.2)
Property, plant and equipment, net	292.5	295.0
Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Feminine Care
Property, Plant and Equipment [Line Items]
Property, plant and equipment, net	$ 73.9	$ 74.3

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service.

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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Amount before accumulated depreciation of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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