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Inventories—Net (Tables)
12 Months Ended
Dec. 31, 2024
Inventory Disclosure [Abstract]  
Summary of Inventories
December 31,
2024
2023
(Dollars in millions)
Raw materials$230 $198 
Work in process18 21 
Finished products79 85 
$327 $304 
Less — Reserves(41)(41)
$286 $263