v3.10.0.1

Financial information by segment, Assets and liabilities by business sectors (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Assets allocated [Abstract] |  |  |  |
Contracted concessional assets | $ 8,549,181 | $ 9,084,270 |  |
Investments carried under the equity method | 53,419 | 55,784 | $ 55,009 |
Current financial investments | 240,834 | 210,138 |  |
Cash and cash equivalents (project companies) | 631,542 | 669,387 | 594,811 | $ 514,712
Total assets | 9,919,031 | 10,492,339 |  |
Liabilities allocated [Abstract] |  |  |  |
Long-term and short-term project debt | 5,091,114 | 5,475,208 | 5,330,467 |
Grants and other liabilities | 1,658,126 | 1,636,060 |  |
Long-term and short-term corporate debt | 684,073 | 643,083 |  |
Total liabilities | 8,162,919 | 8,596,886 |  |
Equity | 1,756,112 | 1,895,453 | $ 1,959,111 | $ 2,023,501
Total liabilities and equity | 9,919,031 | 10,492,339 |  |
Renewable Energy [Member] |  |  |  |
Assets allocated [Abstract] |  |  |  |
Contracted concessional assets | 6,998,020 | 7,436,362 |  |
Investments carried under the equity method | 10,257 | 12,419 |  |
Current financial investments | 15,396 | 17,249 |  |
Cash and cash equivalents (project companies) | 453,096 | 452,792 |  |
Total assets | 7,476,769 | 7,918,822 |  |
Liabilities allocated [Abstract] |  |  |  |
Long-term and short-term project debt | 3,868,626 | 4,162,596 |  |
Grants and other liabilities | 1,656,146 | 1,635,508 |  |
Total liabilities | 5,524,772 | 5,798,104 |  |
Efficient Natural Gas [Member] |  |  |  |
Assets allocated [Abstract] |  |  |  |
Contracted concessional assets | 580,997 | 660,387 |  |
Investments carried under the equity method | 0 | 0 |  |
Current financial investments | 147,192 | 116,430 |  |
Cash and cash equivalents (project companies) | 45,625 | 39,064 |  |
Total assets | 773,814 | 815,881 |  |
Liabilities allocated [Abstract] |  |  |  |
Long-term and short-term project debt | 545,123 | 579,173 |  |
Grants and other liabilities | 161 | 552 |  |
Total liabilities | 545,284 | 579,725 |  |
Electric Transmission Lines [Member] |  |  |  |
Assets allocated [Abstract] |  |  |  |
Contracted concessional assets | 882,980 | 897,269 |  |
Investments carried under the equity method | 0 | 0 |  |
Current financial investments | 61,102 | 59,289 |  |
Cash and cash equivalents (project companies) | 14,043 | 15,325 |  |
Total assets | 958,125 | 971,883 |  |
Liabilities allocated [Abstract] |  |  |  |
Long-term and short-term project debt | 647,820 | 698,346 |  |
Grants and other liabilities | 1,025 | 0 |  |
Total liabilities | 648,845 | 698,346 |  |
Water [Member] |  |  |  |
Assets allocated [Abstract] |  |  |  |
Contracted concessional assets | 87,184 | 90,252 |  |
Investments carried under the equity method | 43,162 | 43,365 |  |
Current financial investments | 15,562 | 14,577 |  |
Cash and cash equivalents (project companies) | 11,686 | 13,681 |  |
Total assets | 157,594 | 161,875 |  |
Liabilities allocated [Abstract] |  |  |  |
Long-term and short-term project debt | 29,545 | 35,093 |  |
Grants and other liabilities | 794 | 0 |  |
Total liabilities | 30,339 | 35,093 |  |
Allocated [Member] |  |  |  |
Assets allocated [Abstract] |  |  |  |
Contracted concessional assets | 8,549,181 | 9,084,270 |  |
Investments carried under the equity method | 53,419 | 55,784 |  |
Current financial investments | 239,252 | 207,545 |  |
Cash and cash equivalents (project companies) | 524,450 | 520,862 |  |
Total assets | 9,366,302 | 9,868,461 |  |
Liabilities allocated [Abstract] |  |  |  |
Long-term and short-term project debt | 5,091,114 | 5,475,208 |  |
Grants and other liabilities | 1,658,126 | 1,636,060 |  |
Total liabilities | 6,749,240 | 7,111,268 |  |
Unallocated [Member] |  |  |  |
Assets allocated [Abstract] |  |  |  |
Other non-current assets | 188,736 | 210,378 |  |
Other current assets (including cash and cash equivalents at holding company level) | 363,993 | 413,500 |  |
Total assets | 552,729 | 623,878 |  |
Liabilities allocated [Abstract] |  |  |  |
Long-term and short-term corporate debt | 684,073 | 643,083 |  |
Other non-current liabilities | 523,827 | 657,345 |  |
Other current liabilities | 205,779 | 185,190 |  |
Total liabilities | 1,413,679 | 1,485,618 |  |
Equity | 1,756,112 | 1,895,453 |  |
Total liabilities and equity | $ 3,169,791 | $ 3,381,071 |  |

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