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Property, Plant and Equipment
 9 Months Ended
Sep. 30, 2025
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
Property, plant and equipment by major asset class consists of the following:
(Dollars in millions)September 30, 2025December 31, 2024
Land, buildings and improvements$389 $380 
Plant and machinery207 203 
Equipment and other453 382 
Total property, plant and equipment, at cost1,049 965 
Less accumulated depreciation(572)(525)
Total property, plant and equipment, net $477 $440 
Depreciation expense related to property, plant and equipment was $18 million and $53 million for the three and nine months ended September 30, 2025, respectively, and $17 million and $51 million for the three and nine months ended September 30, 2024, respectively.