Supplemental Financial Statement Information (Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Inventories
Raw materials and supplies	$ 127.6	$ 113.5
Work in process	248.4	258.5
Finished products	281.3	277.7
Total inventories	657.3	649.7
Other Current Assets
Miscellaneous receivables	22.8	20.8
Prepaid expenses	80.6	83.6
Value added tax collectible from customers	30.5	30.6
Other	29.5	37.0
Total other current assets	163.4	172.0
Property, plant and equipment
Land	12.8	12.9
Buildings	139.2	135.2
Machinery and equipment	813.8	832.9
Construction in progress	68.8	69.7
Finance leases	55.6	39.2
Total gross property	1,090.2	1,089.9
Accumulated depreciation	(710.1)	(726.2)
Total property, plant and equipment, net	380.1	363.7
Other Current Liabilities
Accrued advertising, sales promotion and allowances	19.9	12.9
Accrued trade promotions	53.3	52.7
Accrued freight and warehousing	42.6	35.1
Accrued salaries, vacations and incentive compensation	69.5	57.9
Accrued interest expense	20.4	20.5
Restructuring and related costs reserve	21.5	17.1
Income taxes payable	22.5	36.9
Other	104.1	92.5
Total other current liabilities	353.8	325.6
Other Liabilities
Pensions and other retirement benefits	47.5	55.0
Deferred compensation	17.2	17.4
Mandatory transition tax	7.1	12.8
Restructuring Reserve	0.2	2.5
Other non-current liabilities	31.1	47.8
Total other liabilities	$ 103.1	$ 135.5