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INVENTORIES (Tables)
6 Months Ended
Jun. 28, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventories Inventories consisted of the following:
June 28, 2020December 29, 2019
 (In thousands)
Raw materials and work-in-process$789,375  $800,749  
Finished products439,657  425,919  
Operating supplies45,440  82,447  
Maintenance materials and parts72,669  74,420  
Total inventories$1,347,141  $1,383,535