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Financial investments, Restructuring agreement of Abengoa (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
mi
Aug. 02, 2019
Dec. 31, 2018
USD ($)
Restructuring Agreement [Abstract]      
Other noncurrent receivable $ 73,375   $ 35,065
Restricted cash included in current other receivables 76,900   $ 78,900
Monterrey [Member]      
Restructuring Agreement [Abstract]      
Percentage interest acquired   30.00%  
Other noncurrent receivable 21,300    
Befesa Agua Tenes, S.L.U. [Member]      
Restructuring Agreement [Abstract]      
Other noncurrent receivable $ 10,900    
Ten West Link [Member]      
Restructuring Agreement [Abstract]      
Percentage interest acquired 12.50%    
Length of transmission lines | mi 114    
Rioglass [Member]      
Restructuring Agreement [Abstract]      
Percentage interest acquired 15.12%