v3.21.2
Financial information by segment, Assets and liabilities by geography (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Assets allocated [Abstract]        
Contracted concessional assets $ 8,173,917 $ 8,155,418    
Investments carried under the equity method 296,762 116,614    
Current financial investments 207,801 200,084    
Cash and cash equivalents (project companies) 763,545 868,501 $ 788,895 $ 562,795
Total assets 10,052,618 9,938,354    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 5,278,880 5,237,614    
Grants and other liabilities 1,271,460 1,229,767    
Long-term and short-term corporate debt 1,030,079 993,725    
Total liabilities 8,291,029 8,197,473    
Equity 1,761,589 1,740,881 $ 1,642,047 $ 1,714,856
Total liabilities and equity 10,052,618 9,938,354    
North America [Member]        
Assets allocated [Abstract]        
Contracted concessional assets 3,396,242 3,073,785    
Investments carried under the equity method 256,250 74,660    
Current financial investments 135,664 129,264    
Cash and cash equivalents (project companies) 242,677 206,344    
Total assets 4,030,633 3,484,053    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 1,843,700 1,623,284    
Grants and other liabilities 1,066,410 1,078,974    
Total liabilities 2,910,110 2,702,258    
South America [Member]        
Assets allocated [Abstract]        
Contracted concessional assets 1,219,002 1,211,952    
Investments carried under the equity method 13 0    
Current financial investments 27,846 27,836    
Cash and cash equivalents (project companies) 79,908 70,861    
Total assets 1,326,769 1,310,649    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 902,983 902,500    
Grants and other liabilities 14,399 11,355    
Total liabilities 917,382 913,855    
EMEA [Member]        
Assets allocated [Abstract]        
Contracted concessional assets 3,558,673 3,869,681    
Investments carried under the equity method 40,699 41,954    
Current financial investments 44,291 42,984    
Cash and cash equivalents (project companies) 362,014 255,530    
Total assets 4,005,677 4,210,149    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 2,532,197 2,711,830    
Grants and other liabilities 190,651 139,438    
Total liabilities 2,722,848 2,851,268    
Allocated [Member]        
Assets allocated [Abstract]        
Contracted concessional assets 8,173,917 8,155,418    
Investments carried under the equity method 296,762 116,614    
Current financial investments 207,801 200,084    
Cash and cash equivalents (project companies) 684,599 532,735    
Total assets 9,363,079 9,004,851    
Liabilities allocated [Abstract]        
Long-term and short-term project debt 5,278,880 5,237,614    
Grants and other liabilities 1,271,460 1,229,767    
Total liabilities 6,550,340 6,467,381    
Unallocated [Member]        
Assets allocated [Abstract]        
Other non-current assets 253,170 242,044    
Other current assets (including cash and cash equivalents at holding company level) 436,369 691,459    
Total assets 689,539 933,503    
Liabilities allocated [Abstract]        
Long-term and short-term corporate debt 1,030,079 993,725    
Other non-current liabilities 552,251 589,107    
Other current liabilities 158,359 147,260    
Total liabilities 1,740,689 1,730,092    
Equity 1,761,589 1,740,881    
Total liabilities and equity $ 3,502,278 $ 3,470,973