OTHER FINANCIAL INFORMATION (Property, Plant, And Equipment By Major Classification) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Dec. 28, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	$ 1,320,000,000.0		$ 1,320,000,000.0		$ 1,373,700,000
Less: Accumulated Depreciation	(763,300,000)		(763,300,000)		(768,700,000)
Net Property, Plant and Equipment	556,700,000		556,700,000		605,000,000.0
Asset Impairments	2,800,000	$ 0	4,300,000	$ 10,000,000.0
Impairment charge on transfre of assets to held for sale		$ 0		$ 5,100,000
Land and Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	74,000,000.0		74,000,000.0		80,300,000
Buildings and Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	282,300,000		282,300,000		305,200,000
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment	$ 963,700,000		$ 963,700,000		$ 988,200,000
Minimum | Buildings and Improvements
Property, Plant and Equipment [Line Items]
Useful life			3 years
Minimum | Machinery and Equipment
Property, Plant and Equipment [Line Items]
Useful life			3 years
Maximum | Buildings and Improvements
Property, Plant and Equipment [Line Items]
Useful life			50 years
Maximum | Machinery and Equipment
Property, Plant and Equipment [Line Items]
Useful life			15 years