v3.10.0.1

Related parties (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Nov. 30, 2017 | Feb. 24, 2017 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Details of Balances [Abstract] |  |  |  |  |  |  |
Total non-current payables with related parties |  |  |  |  | $ 141,031 | $ 78,734 |
Income from the purchase of the long-term operation and maintenance payable |  |  |  |  |  | 38,955 | $ 0
Transactions With Related Party [Abstract] |  |  |  |  |  |  |
Financial income |  |  |  |  |  | 36,603 | 1,131
Financial expenses |  |  |  |  |  | (306,340) | (308,570)
Dividends retained from Abengoa |  | $ 10,400 |  |  |  |  |
Repayment of project debt |  |  |  |  |  | 248,904 | 388,755
Related Parties [Member] |  |  |  |  |  |  |
Details of Balances [Abstract] |  |  |  |  |  |  |
Credit receivables (current) |  |  |  |  | 10,544 | 8,256 |
Total current receivables with related parties |  |  |  |  | 10,544 | 8,256 |
Trade payables (current) |  |  |  |  | 63,409 | 39,007 |
Total current payables with related parties |  |  |  |  | 63,409 | 39,007 |
Credit payables (non-current) |  |  |  |  | 141,031 | 78,734 |
Total non-current payables with related parties |  |  |  |  | 141,031 | 78,734 |
Transactions With Related Party [Abstract] |  |  |  |  |  |  |
Dividends retained from Abengoa |  |  |  |  |  |  | 10,400
Subsidiaries [Member] |  |  |  |  |  |  |
Transactions With Related Party [Abstract] |  |  |  |  |  |  |
Services rendered |  |  |  |  |  | 0 | 3,495
Services received |  |  |  |  |  | (82,506) | (82,012)
Financial income |  |  |  |  |  | 3,062 | 36
Financial expenses |  |  |  |  |  | (1,042) | $ (898)
Abengoa [Member] |  |  |  |  |  |  |
Details of Balances [Abstract] |  |  |  |  |  |  |
Accrued Operation and Maintenance payable |  |  |  |  | 57,300 |  |
Payment for debt extinguishment |  |  |  |  |  | 18,300 |
Income from the purchase of the long-term operation and maintenance payable |  |  |  |  |  | $ 39,000 |
Transactions With Related Party [Abstract] |  |  |  |  |  |  |
Term to maintain guarantees and letters of credit |  |  |  |  |  | 5 years |
Guarantees amount |  |  |  |  |  | $ 23,000 |
Guarantees amount replaced |  |  | $ 112,000 |  |  |  |
Guarantees amount canceled |  |  | $ 55,000 |  |  |  |
Abengoa [Member] | Solana [Member] |  |  |  |  |  |  |
Transactions With Related Party [Abstract] |  |  |  |  |  |  |
Performance consideration received | $ 120,000 |  |  |  |  |  |
Performance obligations proceeds applied to project debt | 95,000 |  |  |  |  |  |
Performance obligations proceeds applied to additional plant repairs | 25,000 |  |  |  |  |  |
Other obligations per semester | $ 6,500 |  |  |  |  |  |
Recognition period of other contingent obligations considered |  |  |  |  |  | 8 years 6 months |
Performance obligations proceeds received from Abengoa |  |  |  | $ 77,500 | 42,500 |  |
Repayment of project debt |  |  |  | $ 52,500 | $ 42,500 |  |
Abengoa [Member] | Solana and Mojave [Member] |  |  |  |  |  |  |
Transactions With Related Party [Abstract] |  |  |  |  |  |  |
Minimum ownership requirement percentage | 16.00% |  |  |  |  |  |

X
- Definition The amount of current credit receivables due from related parties. + References No definition available. + Details
Name: | aby_CurrentCreditReceivablesDueFromRelatedParties
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of current trade payables due to related parties. + References No definition available. + Details
Name: | aby_CurrentTradePayablesToRelatedParties
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Dividends retained from Abengoa related to the preferred equity investment in Abengoa Concessoes Brasil Holding (ACBH), which is a subsidiary of Abengoa engaged in the development, construction, investment and management of contracted concessions in Brazil, comprised mostly of transmission lines. Retention is based on the underlying investment agreement supported by the additional agreement reached with Abengoa in the third quarter of 2016. + References No definition available. + Details
Name: | aby_DividendsRetained
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This element represents income from the purchase and settlement of the long-term operation and maintenance payable. + References No definition available. + Details
Name: | aby_GainOnSettlementOfLongTermOperationAndMaintenancePayable
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The canceled amount of guarantees previously issued by a related party related to operations of technical nature. + References No definition available. + Details
Name: | aby_GuaranteesAmountCanceled
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Refers to guarantees issued by a related party on behalf of or for the benefit of the entity. + References No definition available. + Details
Name: | aby_GuaranteesAmountRelatedPartyTransactions
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum percentage of ownership in a concessional asset required that will trigger a change of ownership clause for project financing arrangements. + References No definition available. + Details
Name: | aby_MinimumOwnershipRequirementPercentage
Namespace Prefix: | aby_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of non-current credit payables due to related parties + References No definition available. + Details
Name: | aby_NonCurrentCreditPayablesToRelatedParties
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of trade payables related to long-term operation and maintenance services. + References No definition available. + Details
Name: | aby_NoncurrentTradePayablesOperationAndMaintenance
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of contingent liabilities recognized that the entity does not separately disclose in the same statement or note. + References No definition available. + Details
Name: | aby_OtherContingentObligations
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for the payment of accrued long-term operation and maintenance payable. + References No definition available. + Details
Name: | aby_PaymentForDebtExtinguishment
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of consideration received by Solana as a performance compensation conditioned by a signed consent with DOE. + References No definition available. + Details
Name: | aby_PerformanceObligationsConsiderationReceived
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of performance obligations proceeds used for additional repairs of plant. + References No definition available. + Details
Name: | aby_PerformanceObligationsProceedsAmountUsedForAdditionalRepairsOfThePlant
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The estimated amount of project debt to be prepaid from performance obligations proceeds. + References No definition available. + Details
Name: | aby_PerformanceObligationsProceedsEstimatedPrepaidAmountProjectDebt
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The performance obligations proceeds received resulting from related party transactions. + References No definition available. + Details
Name: | aby_PerformanceObligationsReceivedFromRelatedPartyTransactions
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The recognition period of other contingent obligations considered. + References No definition available. + Details
Name: | aby_RecognitionPeriodOfOtherContingentObligationsConsidered
Namespace Prefix: | aby_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to the replacement amount of guarantees previously issued by Abengoa related to operations of technical nature. + References No definition available. + Details
Name: | aby_ReplacementOfGuaranteesAmount
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period of time Abengoa agreed to maintain any guarantees and letters of credit under a revolving credit line in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | aby_TermToMaintainGuaranteesAndLettersOfCredit
Namespace Prefix: | aby_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of costs associated with financing activities of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 82 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_82_b&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_FinanceCosts
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of income associated with interest and other financing activities of the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_FinanceIncome
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of non-current payables due to related parties. [Refer: Related parties [member]; Payables to related parties] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_NoncurrentPayablesToRelatedParties
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 17 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_17_d&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of revenue arising from the rendering of services in related party transactions. [Refer: Revenue; Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2018-01-01 -Paragraph 21 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_21_c&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of services received in related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 24 -IssueDate 2018-01-01 -Paragraph 21 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2018-03-01&anchor=para_21_c&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ServicesReceivedRelatedPartyTransactions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of current payables due to related parties. [Refer: Related parties [member]; Payables to related parties] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of current receivables due from related parties. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_b&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_RelatedPartiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=aby_AbengoaSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IntangibleAssetsMaterialToEntityAxis=aby_SolanaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_IntangibleAssetsMaterialToEntityAxis=aby_SolanaAndMojaveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |