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Inventories - Schedule of Inventories (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Inventory Disclosure [Abstract]    
Materials, spares and supplies $ 661 $ 606
Work-in-process 2,617 2,338
Finished goods 196 188
Total inventories $ 3,474 $ 3,132