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INVENTORIES (Tables)
9 Months Ended
Sep. 26, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventories, Net Inventories consisted of the following (in millions):
September 26,
2021
December 31,
2020
Materials, spares and supplies$627 $612 
Work-in-process
2,079 2,693 
Finished goods197 240 
Total inventories$2,903 $3,545