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PROPERTIES AND ACCUMULATED DEPRECIATION
12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
PROPERTIES AND ACCUMULATED DEPRECIATION PROPERTIES AND ACCUMULATED DEPRECIATION
 December 31,
(Dollars in millions)20242023
Properties
Land$111 $114 
Buildings1,531 1,482 
Machinery and equipment11,566 10,750 
Construction in progress777 1,228 
Properties and equipment at cost$13,985 $13,574 
Less:  Accumulated depreciation8,370 8,026 
Net properties$5,615 $5,548 

Depreciation expense was $419 million, $405 million, and $384 million for 2024, 2023, and 2022, respectively.

Cumulative construction-period interest of $117 million and $100 million, reduced by accumulated depreciation of $51 million and $46 million, is included in net properties at December 31, 2024 and 2023, respectively.

Eastman capitalized $17 million, $18 million, and $9 million of interest in 2024, 2023, and 2022, respectively.