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Financial expenses-net
 12 Months Ended
Dec. 31, 2019
Financial Expenses-Net
NOTE 17—Financial expenses
—
net:
                         
 
Year ended December, 31
 
 
2019
 
  
2018
 
  
2017
 
 
(U.S. $ in millions)
 
Venezuela devaluation (1)
  $
—
     $
—
     $
42
 
Interest expenses and other bank charges
   
881
     
920
     
875
 
Income from investments
   
(41
 )    
(39
 )    
(84
 )
Foreign exchange (gains) losses
—
net
   
(15
 )    
13
     
65
 
Other, net (2)
   
(4
)     
65
     
(3
 )
                         
Total finance expense—net
  $
822
    $
959
    $
895
 
                         
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(1)
For further information regarding the Venezuela devaluation, refer to note 1a.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(2)
In 2018
,
Other, net comprised mainly of a make-whole payment of $46 million following early redemption of senior notes during 2018.