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Inventories-Net (Tables)
3 Months Ended
Mar. 31, 2023
Inventory Disclosure [Abstract]  
Summary of Inventories
March 31,
2023
December 31,
2022
(Dollars in millions)
Raw materials$208 $203 
Work in process21 18 
Finished products108 80 
 337 301 
Less—Reserves(36)(31)
$301 $270