Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Jun. 30, 2020	Sep. 30, 2019
Inventories
Raw materials and supplies	$ 54.4	$ 55.1
Work in process	69.0	66.5
Finished products	200.1	235.6
Total inventories	323.5	357.2
Other Current Assets
Miscellaneous receivables	18.9	14.9
Inventory returns receivable	1.4	4.9
Prepaid expenses	67.7	65.0
Value added tax collectible from customers	21.1	23.0
Income taxes receivable	18.4	29.1
Other	10.4	3.1
Total other current assets	137.9	140.0
Property, Plant and Equipment
Land	18.9	18.7
Buildings	138.9	137.4
Machinery and equipment	999.0	992.3
Capitalized software costs	46.5	47.8
Construction in progress	32.9	40.9
Total gross property, plant and equipment	1,236.2	1,237.1
Accumulated depreciation and amortization	(869.9)	(841.1)
Total property, plant and equipment, net	366.3	396.0
Other Current Liabilities
Accrued advertising, sales promotion and allowances	56.7	51.9
Accrued trade allowances	26.5	26.2
Accrued salaries, vacations and incentive compensation	53.7	51.5
Income taxes payable	13.6	11.5
Returns reserve	43.0	60.4
Restructuring reserve	6.9	9.5
Value added tax payable	5.9	3.6
Deferred compensation	6.6	10.4
Short term lease obligation	9.8	0.0
Customer advance payments	1.4	1.7
Other	60.4	78.7
Total other current liabilities	284.5	305.4
Other Liabilities
Pensions and other retirement benefits	147.7	149.8
Deferred compensation	27.3	30.3
Long-term income taxes payable	35.3	0.0
Other non-current liabilities	82.2	78.8
Total other liabilities	$ 292.5	$ 258.9