Property, Plant and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Sep. 30, 2022
Property, Plant and Equipment
Total property, plant, and equipment, gross	$ 4,131.5	$ 4,111.1
Accumulated depreciation	(2,635.2)	(2,506.3)
Total property, plant, and equipment, net	1,496.3	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	570.9	555.6
Furniture and fixtures [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	74.4	70.1
Machinery and equipment [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	3,363.9	3,316.3
Construction in progress [Member]
Property, Plant and Equipment
Total property, plant, and equipment, gross	$ 110.5	$ 157.2