PROPERTY, PLANT AND EQUIPMENT (Schedule of Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 27, 2020
Property, Plant and Equipment [Line Items]
Finance leases	$ 2,182	$ 2,182
PP&E, gross	5,860,133	5,744,183
Accumulated depreciation	(3,182,746)	(3,086,692)
PP&E, net	2,677,387	2,657,491
Land
Property, Plant and Equipment [Line Items]
PP&E	251,602	255,171
Buildings
Property, Plant and Equipment [Line Items]
PP&E	1,972,410	1,983,823
Machinery and equipment
Property, Plant and Equipment [Line Items]
PP&E	3,305,901	3,230,199
Autos and trucks
Property, Plant and Equipment [Line Items]
PP&E	73,227	73,647
Construction-in-progress
Property, Plant and Equipment [Line Items]
PP&E	$ 254,811	$ 199,161

Amount, before accumulated amortization, of right-of-use asset from finance lease.

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Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease.

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Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

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