OTHER FINANCIAL INFORMATION (Property, Plant, And Equipment By Major Classification) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019	Dec. 28, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	$ 1,329.9		$ 1,329.9		$ 1,373.7
Less: Accumulated Depreciation	(780.5)		(780.5)		(768.7)
Net Property, Plant and Equipment	549.4		549.4		605.0
Asset Impairments	0.0	$ 0.0	4.3	$ 10.0
Impairment charge on transfer of assets to held for sale				$ 5.1
Land and Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	75.3		75.3		80.3
Buildings and Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	285.0		$ 285.0		305.2
Buildings and Improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life			3 years
Buildings and Improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life			50 years
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	$ 969.6		$ 969.6		$ 988.2
Machinery and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life			3 years
Machinery and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life			15 years