6 Financial income and expense
  | 
            
  | 
            2020  | 
            
  | 
            2019  | 
        
  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
Financial income  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
Interest income  | 
            
  | 
            17  | 
            
  | 
            9  | 
        
Fair value change in derivatives  | 
            
  | 
            27  | 
            
  | 
            20  | 
        
Unwinding of discounted receivables  | 
            
  | 
            -  | 
            
  | 
            1  | 
        
Total financial income  | 
            
  | 
            44  | 
            
  | 
            30  | 
        
  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
Financial expense  | 
            
  | 
            
  | 
            
  | 
            
  | 
        
Interest expense  | 
            
  | 
            (90)  | 
            
  | 
            (92)  | 
        
Interest relating to lease liabilities  | 
            
  | 
            (6)  | 
            
  | 
            (7)  | 
        
Interest relating to defined benefit plans  | 
            
  | 
            (4)  | 
            
  | 
            (7)  | 
        
Capitalized interest during construction  | 
            
  | 
            6  | 
            
  | 
            3  | 
        
Exchange differences  | 
            
  | 
            (4)  | 
            
  | 
            (2)  | 
        
Unwinding of discounted payables  | 
            
  | 
            (4)  | 
            
  | 
            (8)  | 
        
Sundry  | 
            
  | 
            (9)  | 
            
  | 
            (9)  | 
        
Total financial expense  | 
            
  | 
            (111)  | 
            
  | 
            (122)  | 
        
Financial income and expense  | 
            
  | 
            (67)  | 
            
  | 
            (92)  | 
        
In 2020, the interest rate applied in the capitalization of interest during construction was 3% (2019: 3%).