v3.8.0.1

Financial information by segment (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Financial information by segment [Abstract] |
Revenues and Further Adjusted EBITDA, assets and liabilities by operating segments and business sectors |
| a) | The following tables show Revenues and Further Adjusted EBITDA by operating segments and business sectors for the years 2017, 2016 and 2015:
| Revenue |  | Further Adjusted EBITDA |
| For the year ended December 31, |  | For the year ended December 31, |
Geography | 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016 |  | 2015 |
North America |  | $ | 332,705 |  |  | $ | 337,061 |  |  | $ | 328,139 |  |  | $ | 282,328 |  |  | $ | 284,691 |  |  | $ | 279,559 |
South America |  |  | 120,797 |  |  |  | 118,764 |  |  |  | 112,480 |  |  |  | 108,766 |  |  |  | 124,599 |  |  |  | 110,905 |
EMEA |  |  | 554,879 |  |  |  | 515,972 |  |  |  | 350,262 |  |  |  | 388,216 |  |  |  | 354,020 |  |  |  | 233,754 |
Total |  | $ | 1,008,381 |  |  | $ | 971,797 |  |  | $ | 790,881 |  |  | $ | 779,310 |  |  | $ | 763,310 |  |  | $ | 624,218 |
| Revenue |  | Further Adjusted EBITDA |
| For the year ended December 31, |  | For the year ended December 31, |
Business sectors | 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016 |  | 2015 |
Renewable energy |  | $ | 767,226 |  |  | $ | 724,325 |  |  | $ | 543,012 |  |  | $ | 569,193 |  |  | $ | 538,427 |  |  | $ | 413,933 |
Efficient natural gas |  |  | 119,784 |  |  |  | 128,046 |  |  |  | 138,717 |  |  |  | 106,140 |  |  |  | 106,492 |  |  |  | 107,671 |
Electric transmission lines |  |  | 95,096 |  |  |  | 95,137 |  |  |  | 86,393 |  |  |  | 87,695 |  |  |  | 104,795 |  |  |  | 89,047 |
Water |  |  | 26,275 |  |  |  | 24,288 |  |  |  | 22,759 |  |  |  | 16,282 |  |  |  | 13,596 |  |  |  | 13,567 |
Total |  | $ | 1,008,381 |  |  | $ | 971,797 |  |  | $ | 790,881 |  |  | $ | 779,310 |  |  | $ | 763,310 |  |  | $ | 624,218 |
The reconciliation of segment Further Adjusted EBITDA with the profit/(loss) attributable to the parent company is as follows:
|  | For the year ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Loss attributable to the Company |  | $ | (111,804 | ) |  | $ | (4,855 | ) |  | $ | (209,005 | )
Profit attributable to non-controlling interests |  |  | 6,917 |  |  |  | 6,522 |  |  |  | 10,819 |
Income tax |  |  | 119,837 |  |  |  | 1,666 |  |  |  | 23,790 |
Share of profits/(losses) of associates |  |  | (5,351 | ) |  |  | (6,646 | ) |  |  | (7,844 | )
Dividend from exchangeable preferred equity investment in ACBH (Note 21) |  |  | 10,383 |  |  |  | 27,948 |  |  |  | 18,400 |
Financial expense, net |  |  | 448,368 |  |  |  | 405,750 |  |  |  | 526,758 |
Depreciation, amortization, and impairment charges |  |  | 310,960 |  |  |  | 332,925 |  |  |  | 261,301 |
Total segment Further Adjusted EBITDA |  | $ | 779,310 |  |  | $ | 763,310 |  |  | $ | 624,219 |
Assets and liabilities by geography |
| b) | The assets and liabilities by operating segments (and business sector) at the end of 2017 and 2016 are as follows:
Assets and liabilities by geography as of December 31, 2017:
|  | North America |  |  | South America |  |  | EMEA |  |  | Balance as of December 31, 2017 |
Assets allocated |  |  |  |  |  |  |  |  |  |  |  |
Contracted concessional assets |  |  | 3,770,169 |  |  |  | 1,100,778 |  |  |  | 4,213,323 |  |  |  | 9,084,270 |
Investments carried under the equity method |  |  | - |  |  |  | - |  |  |  | 55,784 |  |  |  | 55,784 |
Current financial investments |  |  | 116,451 |  |  |  | 59,831 |  |  |  | 31,263 |  |  |  | 207,545 |
Cash and cash equivalents (project companies) |  |  | 149,236 |  |  |  | 42,548 |  |  |  | 329,078 |  |  |  | 520,862 |
Subtotal allocated |  |  | 4,035,856 |  |  |  | 1,203,157 |  |  |  | 4,629,448 |  |  |  | 9,868,461 |
Unallocated assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 210,378 |
Other current assets (including cash and cash equivalents at holding company level) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 413,500 |
Subtotal unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 623,878 |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,492,339 |
|  | North America |  |  | South America |  |  | EMEA |  |  | Balance as of December 31, 2017 |
Liabilities allocated |  |  |  |  |  |  |  |  |  |  |  |
Long-term and short-term project debt |  |  | 1,821,102 |  |  |  | 876,063 |  |  |  | 2,778,043 |  |  |  | 5,475,208 |
Grants and other liabilities |  |  | 1,593,048 |  |  |  | 810 |  |  |  | 42,202 |  |  |  | 1,636,060 |
Subtotal allocated |  |  | 3,414,150 |  |  |  | 876,873 |  |  |  | 2,820,245 |  |  |  | 7,111,268 |
Unallocated liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term and short-term corporate debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 643,083 |
Other non-current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 657,345 |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 185,190 |
Subtotal unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,485,618 |
Total liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,596,886 |
Equity unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,895,453 |
Total liabilities and equity unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,381,071 |
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,492,339 |
Assets and liabilities by geography as of December 31, 2016:
|  | North America |  |  | South America |  |  | EMEA |  |  | Balance as of December 31, 2016 |
Assets allocated |  |  |  |  |  |  |  |  |  |  |  |
Contracted concessional assets |  |  | 3,920,106 |  |  |  | 1,144,712 |  |  |  | 3,859,454 |  |  |  | 8,924,272 |
Investments carried under the equity method |  |  | - |  |  |  | - |  |  |  | 55,009 |  |  |  | 55,009 |
Current financial investments |  |  | 136,665 |  |  |  | 62,215 |  |  |  | 29,158 |  |  |  | 228,038 |
Cash and cash equivalents (project companies) |  |  | 185,970 |  |  |  | 40,015 |  |  |  | 246,671 |  |  |  | 472,656 |
Subtotal allocated |  |  | 4,242,741 |  |  |  | 1,246,942 |  |  |  | 4,190,291 |  |  |  | 9,679,975 |
Unallocated assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 272,664 |
Other current assets (including cash and cash equivalents at holding company level) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 345,160 |
Subtotal unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 617,824 |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,297,799 |
|  | North America |  |  | South America |  |  | EMEA |  |  | Balance as of December 31, 2016 |
Liabilities allocated |  |  |  |  |  |  |  |  |  |  |  |
Long-term and short-term project debt |  |  | 1,870,861 |  |  |  | 895,316 |  |  |  | 2,564,290 |  |  |  | 5,330,467 |
Grants and other liabilities |  |  | 1,575,303 |  |  |  | 1,512 |  |  |  | 35,230 |  |  |  | 1,612,045 |
Subtotal allocated |  |  | 3,446,164 |  |  |  | 896,828 |  |  |  | 2,599,520 |  |  |  | 6,942,512 |
Unallocated liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term and short-term corporate debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 668,201 |
Other non-current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 546,053 |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 181,922 |
Subtotal unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,396,176 |
Total liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,338,688 |
Equity unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,959,111 |
Total liabilities and equity unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,355,287 |
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,297,799 |
Assets and liabilities by business sectors | Assets and liabilities by business sectors as of December 31, 2017:
|  | Renewable energy |  |  | Efficient natural gas |  |  | Electric transmission lines |  |  | Water |  |  | Balance as of December 31, 2017 |
Assets allocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracted concessional assets |  |  | 7,436,362 |  |  |  | 660,387 |  |  |  | 897,269 |  |  |  | 90,252 |  |  |  | 9,084,270 |
Investments carried under the equity method |  |  | 12,419 |  |  |  | - |  |  |  | - |  |  |  | 43,365 |  |  |  | 55,784 |
Current financial investments |  |  | 17,249 |  |  |  | 116,430 |  |  |  | 59,289 |  |  |  | 14,577 |  |  |  | 207,545 |
Cash and cash equivalents (project companies) |  |  | 452,792 |  |  |  | 39,064 |  |  |  | 15,325 |  |  |  | 13,681 |  |  |  | 520,862 |
Subtotal allocated |  |  | 7,918,822 |  |  |  | 815,881 |  |  |  | 971,883 |  |  |  | 161,875 |  |  |  | 9,868,461 |
Unallocated assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 210,378 |
Other current assets (including cash and cash equivalents at holding company level) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 413,500 |
Subtotal unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 623,878 |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,492,339 |
|  | Renewable energy |  |  | Efficient natural gas |  |  | Electric transmission lines |  |  | Water |  |  | Balance as of December 31, 2017 |
Liabilities allocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term and short-term project debt |  |  | 4,162,596 |  |  |  | 579,173 |  |  |  | 698,346 |  |  |  | 35,093 |  |  |  | 5,475,208 |
Grants and other liabilities |  |  | 1,635,508 |  |  |  | 552 |  |  |  | - |  |  |  | - |  |  |  | 1,636,060 |
Subtotal allocated |  |  | 5,798,104 |  |  |  | 579,725 |  |  |  | 698,346 |  |  |  | 35,093 |  |  |  | 7,111,268 |
Unallocated liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term and short-term corporate debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 643,083 |
Other non-current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 657,345 |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 185,190 |
Subtotal unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,485,618 |
Total liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,596,886 |
Equity unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,895,453 |
Total liabilities and equity unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,381,071 |
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,492,339 |
Assets and liabilities by business sectors as of December 31, 2016:
|  | Renewable energy |  |  | Efficient natural gas |  |  | Electric transmission lines |  |  | Water |  |  | Balance as of December 31, 2016 |
Assets allocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contracted concessional assets |  |  | 7,255,308 |  |  |  | 646,927 |  |  |  | 929,005 |  |  |  | 93,032 |  |  |  | 8,924,272 |
Investments carried under the equity method |  |  | 12,953 |  |  |  | - |  |  |  | - |  |  |  | 42,056 |  |  |  | 55,009 |
Current financial investments |  |  | 13,661 |  |  |  | 136,644 |  |  |  | 62,215 |  |  |  | 15,518 |  |  |  | 228,038 |
Cash and cash equivalents (project companies) |  |  | 420,215 |  |  |  | 30,295 |  |  |  | 11,357 |  |  |  | 10,789 |  |  |  | 472,656 |
Subtotal allocated |  |  | 7,702,137 |  |  |  | 813,866 |  |  |  | 1,002,577 |  |  |  | 161,395 |  |  |  | 9,679,975 |
Unallocated assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 272,664 |
Other current assets (including cash and cash equivalents at holding company level) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 345,160 |
Subtotal unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 617,824 |
Total assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,297,799 |
|  | Renewable energy |  |  | Efficient natural gas |  |  | Electric transmission lines |  |  | Water |  |  | Balance as of December 31, 2016 |
Liabilities allocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term and short-term project debt |  |  | 3,979,096 |  |  |  | 598,256 |  |  |  | 711,517 |  |  |  | 41,598 |  |  |  | 5,330,467 |
Grants and other liabilities |  |  | 1,611,067 |  |  |  | 239 |  |  |  | 739 |  |  |  | - |  |  |  | 1,612,045 |
Subtotal allocated |  |  | 5,590,163 |  |  |  | 598,495 |  |  |  | 712,256 |  |  |  | 41,598 |  |  |  | 6,942,512 |
Unallocated liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term and short-term corporate debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 668,201 |
Other non-current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 546,053 |
Other current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 181,922 |
Subtotal unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,396,176 |
Total liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,338,688 |
Equity unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,959,111 |
Total liabilities and equity unallocated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,355,287 |
Total liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,297,799 |
Depreciation, amortization and impairment charges recognized |
| c) | The amount of depreciation, amortization and impairment charges recognized for the years ended December 31, 2017, 2016 and 2015 are as follows:
|  | For the year ended December 31, |
Depreciation, amortization and impairment by geography |  | 2017 |  |  | 2016 |  |  | 2015 |
North America |  |  | (123,726 | ) |  |  | (129,478 | ) |  |  | (129,091 | )
South America |  |  | (40,880 | ) |  |  | (62,387 | ) |  |  | (41,274 | )
EMEA |  |  | (146,354 | ) |  |  | (141,060 | ) |  |  | (90,936 | )
Total |  |  | (310,960 | ) |  |  | (332,925 | ) |  |  | (261,301 | )
| For the year ended December 31, |
Depreciation, amortization and impairment by business sectors | 2017 |  | 2016 |  | 2015 |
Renewable energy |  |  | (282,376 | ) |  |  | (304,235 | ) |  |  | (232,699 | )
Electric transmission lines |  |  | (28,584 | ) |  |  | (28,690 | ) |  |  | (28,602 | )
Total |  |  | (310,960 | ) |  |  | (332,925 | ) |  |  | (261,301 | )

X
- Definition The disclosure of depreciation, amortization and impairment charges recognised by geography and business sector. + References No definition available. + Details
Name: | aby_DisclosureOfDepreciationAmortizationAndImpairmentChargesRecognizedExplanatoryTableTextBlock
Namespace Prefix: | aby_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of geographical information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2016-01-13 -Paragraph 33 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2016-03-30&anchor=para_33&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_DisclosureOfGeographicalAreasExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of operating segments. [Refer: Operating segments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2016-01-13 -Paragraph 23 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2016-03-30&anchor=para_23&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the entity's products and services. [Refer: Products and services [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2016-01-13 -Paragraph 32 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2016-03-30&anchor=para_32&doctype=Standard -URIDate 2016-03-31 + Details
Name: | ifrs-full_DisclosureOfProductsAndServicesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration