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Other income (Tables)
 12 Months Ended
Dec. 31, 2019
Other income [Abstract]  
Other Income (Expense)
Other income (expenses) as of December 31, 2019, 2018 and 2017, is summarized as follows:
 
  
2019
  
2018
  
2017
 
Gain (loss) from the sale of subsidiaries (see Note 5)
 
$
279,744
  
$
111,484
  
$
(273,032
)
Other, net
  
(472
)
  
664
   
1,554
 
Recoveries of taxes paid in prior years, net of expenses for recovery
  
(16,595
)
  
(3,919
)
  
43,884
 
Cancellation of projects
  
(18,944
)
  
(5,604
)
  
(13,127
)
Gain from loss of control of subsidiary TMMDM (see Note 5)
  
-
   
-
   
3,458,467
 
Goodwill impairment (see Note 5)
  
(9,826
)
  
-
   
-
 
  
$
233,907
  
$
102,625
  
$
3,217,746