Property, Plant and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 28, 2018	Sep. 28, 2018
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 2,617.1	$ 2,549.7
Accumulated depreciation	(1,476.5)	(1,408.8)
Total property, plant and equipment, net	1,140.6	1,140.9
Land and improvements [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	11.7	11.6
Building and improvements [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	258.7	238.0
Furniture and fixtures [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	31.8	31.5
Machinery and equipment [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	2,151.6	2,089.6
Construction in progress [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 163.3	$ 179.0