v3.22.0.1
Financial information by segment, Assets and liabilities by geography (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Assets allocated [Abstract]        
Contracted concessional assets $ 8,021,568 $ 8,155,418    
Investments carried under the equity method 294,581 116,614 $ 139,925  
Current financial investments 207,379 200,084    
Cash and cash equivalents (project companies) 622,689 868,501 562,795 $ 631,542
Total assets 9,751,930 9,938,354    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 5,036,193 5,237,614 4,852,348  
Grants and other liabilities 1,263,744 1,229,767    
Long-term and short-term corporate debt 1,023,071 993,725 723,791  
Total liabilities 8,003,325 8,197,473    
Equity 1,748,605 1,740,881 $ 1,714,856 $ 1,756,112
Total liabilities and equity 9,751,930 9,938,354    
North America [Member]        
Assets allocated [Abstract]        
Contracted concessional assets 3,355,669 3,073,785    
Investments carried under the equity method 253,221 74,660    
Current financial investments 135,224 129,264    
Cash and cash equivalents (project companies) 171,744 206,344    
Total assets 3,915,858 3,484,053    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 1,792,739 1,623,284    
Grants and other liabilities 1,051,679 1,078,974    
Total liabilities 2,844,418 2,702,258    
South America [Member]        
Assets allocated [Abstract]        
Contracted concessional assets 1,231,276 1,211,952    
Investments carried under the equity method 0 0    
Current financial investments 28,155 27,836    
Cash and cash equivalents (project companies) 74,149 70,861    
Total assets 1,333,580 1,310,649    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 887,497 902,500    
Grants and other liabilities 14,445 11,355    
Total liabilities 901,942 913,855    
EMEA [Member]        
Assets allocated [Abstract]        
Contracted concessional assets 3,434,623 3,869,681    
Investments carried under the equity method 41,360 41,954    
Current financial investments 44,000 42,984    
Cash and cash equivalents (project companies) 287,655 255,530    
Total assets 3,807,638 4,210,149    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 2,355,957 2,711,830    
Grants and other liabilities 197,620 139,438    
Total liabilities 2,553,577 2,851,268    
Allocated [Member]        
Assets allocated [Abstract]        
Contracted concessional assets 8,021,568 8,155,418    
Investments carried under the equity method 294,581 116,614    
Current financial investments 207,379 200,084    
Cash and cash equivalents (project companies) 533,548 532,735    
Total assets 9,057,076 9,004,851    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 5,036,193 5,237,614    
Grants and other liabilities 1,263,744 1,229,767    
Total liabilities 6,299,937 6,467,381    
Unallocated [Member]        
Assets allocated [Abstract]        
Other non-current assets 268,876 242,044    
Other current assets (including cash and cash equivalents at holding company level) 425,978 691,459    
Total assets 694,854 933,503    
Liabilities allocated [Abstract]        
Long-term and short-term corporate debt 1,023,071 993,725    
Other non-current liabilities 532,312 589,107    
Other current liabilities 148,005 147,260    
Total liabilities 1,703,388 1,730,092    
Equity 1,748,605 1,740,881    
Total liabilities and equity $ 3,451,993 $ 3,470,973