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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment
NOTE 5—Property, plant and equipment:
Property, plant and equipment, net, consisted of the following:
 
    
December 31,
  
    
2020
     
2019
  
    
(U.S. $ in millions)
  
Machinery and equipment
    $ 5,245      $ 5,385  
Buildings
      2,720        2,839  
Computer equipment and other assets
      2,197        2,131  
Assets under construction and payments on account
      933        672  
Land
  
 
 292
 
  
 
 323  
 
  
 
 
 
  
 
 
  
 
  
 
 11,388
 
  
 
 11,350  
Less—accumulated depreciatio
n
      (5,092 )       (4,914 ) 
    
 
 
     
 
 
  
       $6,296        $6,436  
    
 
 
     
 
 
  
Depreciation expenses were $537 million, $609 million and $676 million in the years ended December 31, 2020, 2019 and 2018, respectively. During the years ended December 31, 2020, 2019 and 2018, Teva had impairments of
property
, plant and equipment in the amount of $416 million, $139 million and $500 million, respectively.
See note
15
.