Property, Plant and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 30, 2016	Sep. 30, 2016
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 1,819.7	$ 1,767.8
Accumulated depreciation	(1,018.2)	(961.5)
Total property, plant and equipment, net	801.5	806.3
Land and improvements [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	11.6	11.6
Building and improvements [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	135.4	133.5
Furniture and fixtures [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	29.8	29.5
Machinery and equipment [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	1,548.4	1,533.3
Construction in progress [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 94.5	$ 59.9