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INVENTORIES (Tables)
9 Months Ended
Sep. 27, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories Inventories consisted of the following:
September 27, 2020December 29, 2019
 (In thousands)
Raw materials and work-in-process$778,118 $800,749 
Finished products427,667 425,919 
Operating supplies45,561 82,447 
Maintenance materials and parts77,358 74,420 
Total inventories$1,328,704 $1,383,535