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Note 6 - Financial Results
 12 Months Ended
Dec. 31, 2017
Statement Line Items [Line Items]  
Disclosure of finance income (cost) [text block]
6
Financial results
 
(all amounts in thousands of U.S. dollars)   Year ended December 31,  
    2017     2016     2015  
             
Interest Income    
51,525
      
60,405
      
39,516
  
Net result on changes in FV of financial assets at FVTPL    
(3,920
 )    
5,799
      
(4,942
 )
Finance income    
47,605
      
66,204
      
34,574
  
Finance cost    
(27,072
 )    
(22,329
 )    
(23,058
 )
Net foreign exchange transactions results (*)    
(48,955
 )    
(2,146
 )    
(13,301
 )
Foreign exchange derivatives contracts results (**)    
(8,996
 )    
(31,310
 )    
30,468
  
Other    
14,392
      
11,447
      
(14,473
 )
Other financial results    
(43,559
 )    
(22,009
 )    
2,694
  
Net financial results    
(23,026
 )    
21,866
      
14,210
  
From discontinued operations    
9
      
88
      
382
  
     
(23,017
 )    
21,954
      
14,592
  
 
During
2015
Tenaris has derecognized all its fixed income financial instruments categorized as available for sale.
 
(*)In
2017
and
2016
includes the negative impact from Euro appreciation against the U.S. dollar on Euro denominated intercompany liabilities in subsidiaries with functional currency U.S. Dollar, largely offset by an increase in currency translation adjustment reserve from an Italian subsidiary.
 
(**) In
2016
includes the negative impact from Brazilian Real appreciation against the U.S. dollar on hedging instruments and of Cash and cash equivalent and Other investments denominated in U.S. dollar in subsidiaries which functional currency is the Brazilian real, partially offset by an increase in currency translation adjustment reserve from the Brazilian subsidiaries.