Property, Plant and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment
Total property, plant, and equipment, gross	$ 4,140.8	$ 4,111.1
Accumulated depreciation	(2,716.4)	(2,506.3)
Total property, plant, and equipment, net	1,424.4	1,604.8
Land and improvements [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	11.8	11.9
Building and improvements [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	586.8	555.6
Furniture and fixtures [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	73.9	70.1
Machinery and equipment [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	3,387.7	3,316.3
Construction in progress [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	$ 80.6	$ 157.2