Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2021	Sep. 30, 2021
Inventories
Raw materials and supplies	$ 65.2	$ 61.3
Work in process	85.7	83.4
Finished products	256.6	201.0
Total inventories	407.5	345.7
Other Current Assets
Miscellaneous receivables	31.2	30.3
Inventory returns receivable	0.7	0.9
Prepaid expenses	77.8	67.3
Value added tax collectible from customers	17.2	19.6
Income taxes receivable	30.1	29.1
Other	8.2	12.9
Total other current assets	165.2	160.1
Property, Plant and Equipment
Land	19.0	19.2
Buildings	144.5	144.5
Machinery and equipment	1,050.6	1,049.0
Capitalized software costs	56.7	57.0
Construction in progress	48.1	44.0
Total gross property, plant and equipment	1,318.9	1,313.7
Accumulated depreciation and amortization	(962.3)	(951.1)
Total property, plant and equipment, net	356.6	362.6
Other Current Liabilities
Accrued advertising, sales promotion and allowances	36.4	33.8
Accrued trade allowances	28.4	34.0
Accrued salaries, vacations and incentive compensation	27.9	66.4
Income taxes payable	7.2	9.8
Returns reserve	41.9	52.7
Restructuring reserve	2.5	5.5
Value added tax payable	5.8	4.6
Deferred compensation	6.5	5.9
Short term lease obligation	11.6	11.0
Customer advance payments	2.3	0.6
Dividends payable	8.2	8.2
Other	60.0	68.3
Total other current liabilities	238.7	300.8
Other Liabilities
Pensions and other retirement benefits	55.0	55.4
Deferred compensation	22.4	22.7
Noncurrent lease obligation	44.9	46.9
Other non-current liabilities	65.8	65.3
Total other liabilities	$ 188.1	$ 190.3