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Inventories (Tables)
12 Months Ended
Dec. 31, 2023
Inventory Disclosure [Abstract]  
Schedule of Inventories
Inventories consisted of the following (in millions):
20232022
Materials, spares and supplies
$606 $599 
Work-in-process2,338 2,297 
Finished goods188 192 
Total inventories$3,132 $3,088