Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Sep. 27, 2019	Sep. 28, 2018
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 2,883.9	$ 2,549.7
Accumulated depreciation and amortization	(1,678.3)	(1,408.8)
Total property, plant and equipment, net	1,205.6	1,140.9
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	11.7	11.6
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	354.4	238.0
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	33.8	31.5
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	2,311.5	2,089.6
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 172.5	$ 179.0