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Inventories (Tables)
12 Months Ended
Dec. 31, 2024
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of the following (in millions):
20242023
Materials, spares and supplies
$661 $606 
Work-in-process2,617 2,338 
Finished goods196 188 
Total inventories$3,474 $3,132