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INVENTORIES (Details) - USD ($)
$ in Millions
Sep. 29, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Materials, spares and supplies $ 460 $ 446
Work-in-process 2,696 2,161
Finished goods 318 390
Total inventories 3,474 2,997
Capitalized contract cost $ 585 $ 443