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PROPERTY, PLANT AND EQUIPMENT
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT
The major components of property, plant and equipment as of December 31, 2020 and 2019 consist of:
(in millions)20202019
Land$79 $79 
Buildings and improvements686 696 
Machinery and equipment1,722 1,606 
Other equipment and leasehold improvements360 369 
Equipment on operating lease65 56 
Construction in progress436 301 
3,348 3,107 
Accumulated depreciation(1,781)(1,641)
$1,567 $1,466 
Depreciation expense was $180 million, $178 million and $175 million for 2020, 2019 and 2018, respectively.