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Inventories (Tables)
3 Months Ended
Mar. 31, 2023
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
Inventories consists of the following:
(Dollars in millions)March 31, 2023December 31, 2022
Raw materials$80 $83 
Work in progress272 224 
Finished goods12 12 
Total $364 $319