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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment
NOTE 5—Property, plant and equipment:
Property, plant and equipment, net, consisted of the following:
 
    
December 31,
  
    
2021
     
2020
  
    
(U.S. $ in millions)
  
Machinery and equipment
    $ 5,098      $ 5,245  
Buildings
      2,568        2,720  
Computer equipment and other assets
      2,261        2,197  
Assets under construction and payments on account
      1,034        933  
Land
      262        292  
    
 
 
     
 
 
  
       11,223        11,388  
Less—accumulated depreciation
      (5,241 )       (5,092 ) 
    
 
 
     
 
 
  
     $5,982      $6,296  
    
 
 
     
 
 
  
Depreciation expenses were $528 million, $537 million and $609 million in the years ended December 31, 2021, 2020 and 2019, respectively. During the years ended December 31, 2021, 2020 and 2019, Teva recorded impairments of property, plant and equipment in the amount of $160 million, $416 million and $139 million, respectively. See note 15.