Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023
Inventories
Raw materials and supplies	$ 87.3	$ 86.3
Work in process	95.8	91.1
Finished products	313.3	315.0
Total inventories	496.4	492.4
Other Current Assets
Prepaid expenses	78.8	72.5
Value added tax receivables	60.2	43.7
Income taxes receivable	18.5	18.9
Other	14.1	12.3
Total other current assets	171.6	147.4
Property, Plant and Equipment
Land	18.6	18.5
Buildings	144.3	142.6
Machinery and equipment	1,118.7	1,105.3
Capitalized software costs	61.6	60.2
Construction in progress	41.4	38.5
Total gross property, plant and equipment	1,384.6	1,365.1
Accumulated depreciation and amortization	(1,057.1)	(1,027.2)
Total property, plant and equipment, net	327.5	337.9
Other Current Liabilities
Accrued advertising and sales promotion	44.7	31.5
Accrued trade allowances	28.3	29.8
Accrued salaries, vacations and incentive compensation	42.8	65.4
Income taxes payable	8.6	11.9
Returns reserve	33.6	53.5
Value added tax payable	26.5	7.0
Accrued interest	25.2	25.0
Other	88.9	85.4
Total other current liabilities	298.6	309.5
Other Liabilities
Pensions and other retirement benefits	60.7	58.2
Other	115.5	121.5
Total other liabilities	$ 176.2	$ 179.7