DETAIL OF CERTAIN FINANCIAL STATEMENT ACCOUNTS - Summary of Balance Sheet Accounts (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
INVENTORIES:
Finished goods	$ 506.2	$ 926.2
Raw materials	272.5	293.2
Work-in-progress	101.6	124.1
Inventories	880.3	1,343.5
PROPERTY, PLANT AND EQUIPMENT, NET:
Property, plant and equipment, gross	1,375.7	1,383.9
Less: accumulated depreciation	(765.4)	(777.9)
Property, plant and equipment, net	610.3	606.0
OTHER ASSETS:
Operating lease right-of-use assets	262.6	288.9
Net deferred tax assets	189.8	143.5
Convertible debt investments	85.8	117.0
Accrued pension, postretirement and executive retirement assets	64.1	69.6
Loans receivable	0.0	32.8
Other	30.8	29.1
Other assets	633.1	680.9
OTHER CURRENT LIABILITIES:
Current lease liabilities	76.4	76.2
Advertising and promotional accruals	143.0	74.8
Payroll and other compensation accruals	51.2	44.2
Accrued taxes	28.5	29.4
Accrued interest	31.9	30.1
Other	119.2	142.3
Other current liabilities	450.2	397.0
OTHER NON-CURRENT LIABILITIES:
Non-current operating lease liabilities	220.1	223.2
Accrued pension, postretirement and executive retirement liabilities	76.7	82.1
Net deferred tax liabilities	1.1	8.5
Other	52.0	45.2
Other non-current liabilities	349.9	359.0
Machinery and equipment
PROPERTY, PLANT AND EQUIPMENT, NET:
Property, plant and equipment, gross	651.7	644.0
Buildings
PROPERTY, PLANT AND EQUIPMENT, NET:
Property, plant and equipment, gross	277.1	262.2
Land and improvements
PROPERTY, PLANT AND EQUIPMENT, NET:
Property, plant and equipment, gross	149.0	145.0
Construction in progress
PROPERTY, PLANT AND EQUIPMENT, NET:
Property, plant and equipment, gross	104.6	95.5
Software
PROPERTY, PLANT AND EQUIPMENT, NET:
Property, plant and equipment, gross	109.9	127.9
Furniture and fixtures
PROPERTY, PLANT AND EQUIPMENT, NET:
Property, plant and equipment, gross	62.3	65.4
Finance leases
PROPERTY, PLANT AND EQUIPMENT, NET:
Property, plant and equipment, gross	$ 21.1	$ 43.9