v3.10.0.1

Income Tax, Analysis of deferred tax assets and liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax assets | $ 136,066 | $ 165,136 | $ 202,891
Deferred tax liabilities | $ 211,000 | $ 186,583 | $ 95,037
Corporate tax rate | 21.00% | 35.00% |
Net operating losses | $ 387,000 |  |
Net tax credits for Operating losses carryforwards [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax assets | 55,835 | $ 71,219 |
Temporary differences derivatives financial instruments [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax assets | 79,865 | 93,719 |
Temporary differences derivatives financial instruments [Member] | Solar Plants in Spain [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax assets | 62,000 |  |
Temporary differences derivatives financial instruments [Member] | ACT [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax assets | 13,000 |  |
Temporary differences tax/book amortization [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax liabilities | 126,792 | 113,432 |
Temporary differences tax/book value of contracted concessional assets [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax liabilities | 73,793 | 66,247 |
Other temporary differences [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax assets | 366 | 198 |
Deferred tax liabilities | 10,415 | 6,904 |
Temporary difference for accelerated tax amortization [Member] | Solar Plants in Spain [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax liabilities | 74,000 | 51,000 |
Temporary difference for accelerated tax amortization [Member] | Solana and Mojave [Member] |  |  |
Deferred Tax Assets and Liabilities [Abstract] |  |  |
Deferred tax liabilities | $ 55,000 | $ 63,000 |

X
- Definition Amount of deferred tax asset attributable to net operating loss carryforwards. + References No definition available. + Details
Name: | aby_NetOperatingLossCarryforwards
Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ApplicableTaxRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_o&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_56&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DeferredTaxAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_g_i&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_54_o&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_56&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DeferredTaxLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=ifrs-full_UnusedTaxCreditsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=ifrs-full_UnrealisedForeignExchangeGainsLossesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | ifrs-full_TypesOfFinancialAssetsAxis=aby_ACTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=aby_TemporaryDifferenceTaxBookAmortizationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=aby_TemporaryDifferenceContractedConcessionalAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=ifrs-full_OtherTemporaryDifferencesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis=aby_TemporaryDifferenceForAcceleratedTaxAmortizationMember
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: |