Property, Plant, and Equipment (Details) - USD ($)	Sep. 30, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Land	$ 18,900,000	$ 18,500,000
Buildings and Improvements, Gross	147,900,000	142,600,000
Machinery and Equipment, Gross	1,132,700,000	1,105,300,000
Capitalized Computer Software, Gross	62,500,000	60,200,000
Construction in Progress, Gross	62,000,000.0	38,500,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	1,074,900,000	$ 1,027,200,000
Non-Cash Investing Activity - Acqusition of PP&E	$ 5.8