v3.10.0.1
Project debt, Movements of project debt (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Total Project Debt [Abstract]      
Beginning balance   $ 5,475,208 $ 5,330,467
Increases   393,007 356,734
Decreases   (620,767) (551,691)
Debt refinancing IFRS 9 impact $ (36,600)    
Changes in the scope of the consolidated financial statements   81,362  
Currency translation differences   (162,455) 339,698
Reclassifications   0 0
Ending balance   5,091,114 5,475,208
IFRS 9 Adjustment [Member]      
Total Project Debt [Abstract]      
First time application of IFRS 9   (39,599)  
Debt refinancing IFRS 9 impact   (36,642)  
Project Debt - Long-term [member]      
Total Project Debt [Abstract]      
Beginning balance   5,228,917 4,629,184
Increases   105,466 52,027
Decreases   (98,450) (42,560)
Changes in the scope of the consolidated financial statements   79,016  
Currency translation differences   (150,019) 316,646
Reclassifications   (262,030) 273,620
Ending balance   4,826,659 5,228,917
Project Debt - Long-term [member] | IFRS 9 Adjustment [Member]      
Total Project Debt [Abstract]      
First time application of IFRS 9   (39,599)  
Debt refinancing IFRS 9 impact   (36,642)  
Project Debt - Short-term [Member]      
Total Project Debt [Abstract]      
Beginning balance   246,291 701,283
Increases   288,541 304,707
Decreases   (522,317) (509,131)
Changes in the scope of the consolidated financial statements   2,346  
Currency translation differences   (12,436) 23,052
Reclassifications   262,030 (273,620)
Ending balance   264,455 $ 246,291
Project Debt - Short-term [Member] | IFRS 9 Adjustment [Member]      
Total Project Debt [Abstract]      
First time application of IFRS 9   0  
Debt refinancing IFRS 9 impact   $ 0