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Property, Plant and Equipment (Tables)
9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
Property, plant and equipment by major asset class consists of the following:
(Dollars in millions)September 30, 2021December 31, 2020
Land, buildings and improvements$301 $294 
Plant and machinery212 186 
Equipment and other270 276 
Total property, plant and equipment, at cost783 756 
Less accumulated depreciation(427)(401)
Total property, plant and equipment, net$356 $355