Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Sep. 29, 2017	Sep. 30, 2016
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 2,059.0	$ 1,767.8
Accumulated depreciation and amortization	(1,176.7)	(961.5)
Total property, plant and equipment, net	882.3	806.3
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	11.6	11.6
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	137.8	133.5
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	29.5	29.5
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	1,715.3	1,533.3
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 164.8	$ 59.9