Property, Plant and Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Mar. 30, 2018	Sep. 29, 2017
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 2,198.8	$ 2,059.0
Accumulated depreciation	(1,291.7)	(1,176.7)
Total property, plant and equipment, net	907.1	882.3
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	172.3	137.8
Furniture and fixtures [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	31.2	29.5
Machinery and equipment [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	1,834.7	1,715.3
Construction in progress [Member]
Property, Plant and Equipment
Total property, plant and equipment, gross	$ 149.0	$ 164.8