v3.10.0.1
Significant accounting policies, Lease (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
Contracted concessional assets $ 8,549,181 $ 9,084,270  
Deferred tax assets 136,066 165,136 $ 202,891
Long- term project debt 4,826,659 5,228,917  
Grants and other liabilities 1,658,126 1,636,060  
Deferred tax liabilities 211,000 186,583 $ 95,037
Other Reserves 95,011 80,968  
Retained Earnings (449,274) (477,214)  
Financial assets $ 1,161,441 1,169,216  
Other Reserves [Member]      
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
IFRS 9 Adjustments, hedge accounting   1,326  
Retained Earnings [Member]      
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
IFRS 9 Adjustments, expected credit losses [1]   (38,182)  
IFRS 9 Adjustments, modifications of financial liabilities   27,695  
IFRS 9 Adjustments, hedge accounting   (1,326)  
Long-term Project Debt [Member]      
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
IFRS 9 Adjustments, modifications of financial liabilities   (39,599)  
Grants and Other Liabilities [Member]      
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
IFRS 16 adjustments   62,982  
Deferred Tax Liabilities [Member]      
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
IFRS 9 Adjustments, modifications of financial liabilities   8,849  
Contracted Concessional Assets [Member]      
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
IFRS 9 Adjustments, expected credit losses [1]   (53,048)  
IFRS 16 adjustments   62,982  
Financial assets   936,004  
Deferred Tax Assets [Member]      
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
IFRS 9 Adjustments, expected credit losses [1]   14,866  
IFRS 9 Adjustments, modifications of financial liabilities   (3,055)  
Restated [Member]      
Disclosure of expected impact of initial application of new standards or interpretations [abstract]      
Contracted concessional assets   9,094,204  
Deferred tax assets   176,947  
Long- term project debt   5,189,318  
Grants and other liabilities   1,699,042  
Deferred tax liabilities   195,432  
Other Reserves   82,294  
Retained Earnings   $ (489,027)  
[1] The expected credit losses provision only applies to the contracted concessional assets recorded as financial assets for an amount before provision of $936,004 thousand as of December 31, 2017 (see Note 6).