INVENTORIES (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Materials, spares and supplies	$ 640	$ 606
Work-in-process	2,443	2,338
Finished goods	195	188
Total inventories	3,278	3,132
Capitalized contract cost	$ 1,100	$ 989