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Inventories
 3 Months Ended
Mar. 31, 2025
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consisted of the following as of March 31, 2025 and December 31, 2024:

(dollars in millions)March 31, 2025December 31, 2024
Raw materials and work-in-process$127 $134 
Finished goods459 423 
Total$586 $557 

Raw materials, work-in-process and finished goods are net of valuation write-downs of $85 million and $82 million as of March 31, 2025 and December 31, 2024, respectively.