Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Jun. 30, 2024	Sep. 30, 2023
Inventories
Raw materials and supplies	$ 80.3	$ 86.3
Work in process	88.8	91.1
Finished products	286.8	315.0
Total inventories	455.9	492.4
Other Current Assets
Prepaid expenses	76.1	72.5
Value added tax receivables	44.8	43.7
Income taxes receivable	16.4	18.9
Other	14.4	12.3
Total other current assets	151.7	147.4
Property, Plant and Equipment
Land	18.6	18.5
Buildings	144.2	142.6
Machinery and equipment	1,115.8	1,105.3
Capitalized software costs	61.9	60.2
Construction in progress	41.9	38.5
Total gross property, plant and equipment	1,382.4	1,365.1
Accumulated depreciation and amortization	(1,057.0)	(1,027.2)
Total property, plant and equipment, net	325.4	337.9
Other Current Liabilities
Accrued advertising and sales promotion	51.0	31.5
Accrued trade allowances	29.5	29.8
Accrued salaries, vacations and incentive compensation	53.3	65.4
Income taxes payable	18.2	11.9
Returns reserve	41.4	53.5
Value added tax payable	10.2	7.0
Accrued interest	9.6	25.0
Other	91.8	85.4
Total other current liabilities	305.0	309.5
Other Liabilities
Pensions and other retirement benefits	57.3	58.2
Other	111.7	121.5
Total other liabilities	$ 169.0	$ 179.7