Name:	aby_BaseErosionAntiAbuseTaxAppliesOnEntityThatExceedsTaxableIncomePercentage
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Refers to the percentage on limitation imposed on net interest expense, that exceeds earnings before interest and tax from 2022 onwards pursuant to Tax Cuts and Jobs Act of 2017.

No definition available.

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Refers to the percentage on limitation imposed on net interest expense, that exceeds earnings before interest, taxes, depreciation and amortization from 2018 to 2021 pursuant to Tax Cuts and Jobs Act of 2017.

No definition available.

Name:	aby_LimitationImposedOnNetInterestExpenseThatExceedsEarningsBeforeInterestTaxesDepreciationAndAmortizationPercentage
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Data Type:	num:percentItemType
Balance Type:	na
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Refers to the percentage on limitation imposed on taxable income for which net operating loss carryforward is allowed pursuant to Tax Cuts and Jobs Act of 2017.

No definition available.

Name:	aby_LimitationImposedOnNetOperatingLossArisingInTaxYearsOnTaxableIncomePercentage
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Data Type:	num:percentItemType
Balance Type:	na
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Refers to the applicable carryforward period for net operating loss pursuant to Tax Cuts and Jobs Act of 2017.

No definition available.

Name:	aby_NetOperatingLossApplicableCarryForwardPeriod
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to expenses not deductible and tax losses in determining taxable profit (tax loss).

No definition available.

Name:	aby_TaxEffectOfExpenseNotDeductibleAndTaxLossesInDeterminingTaxableProfitTaxLoss
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The amount that represents the difference between the income tax expense and the product of the accounting profit before tax multiplied by the applicable tax rate which is attributable to an ownership change under section 382 of the internal revenue code. One-time amount with no cash impact.

No definition available.

Name:	aby_TaxEffectOfUSInternalRevenueCodeSection382
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The tax expense (income) divided by the accounting profit. [Refer: Accounting profit]

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Name:	ifrs-full_AverageEffectiveTaxRate
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Data Type:	num:percentItemType
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The aggregate amount included in the determination of profit (loss) for the period in respect of current tax and deferred tax. [Refer: Current tax expense (income); Deferred tax expense (income)]

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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=26&date=2018-03-01&anchor=para_35_b_viii&doctype=Standard
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-Subparagraph h
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_23_h&doctype=Standard
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_79&doctype=Standard
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_i&doctype=Standard
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-Paragraph 82
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_82_d&doctype=Standard
-URIDate 2018-03-16

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-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

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-Name IFRS
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B13_g&doctype=Appendix&seq=2
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The amount of income tax relating to an entity's share of other comprehensive income of associates and joint ventures accounted for using the equity method. [Refer: Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax]

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- References

No definition available.

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The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that the entity does not separately disclose in the same statement or note. [Refer: Accounting profit; Applicable tax rate]

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The profit (loss) before tax expense or income. [Refer: Profit (loss)]

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-Name IFRS
-Number 8
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_28_b&doctype=Standard
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-Name IFRS
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_23&doctype=Standard
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-Name IAS
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_103&doctype=Standard
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-Name IAS
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_102&doctype=Standard
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-Name IFRS
-Number 5
-IssueDate 2018-01-01
-Paragraph 33
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=5&date=2018-03-01&anchor=para_33_b_i&doctype=Standard
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Name:	ifrs-full_ProfitLossBeforeTax
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to changes in the tax rate. [Refer: Accounting profit]

Name:	ifrs-full_TaxEffectFromChangeInTaxRate
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to foreign tax rates. [Refer: Accounting profit]

Name:	ifrs-full_TaxEffectOfForeignTaxRates
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

The amount that represents the difference between the tax expense (income) and the product of the accounting profit multiplied by the applicable tax rate(s) that relates to revenues that are exempt from taxation. [Refer: Accounting profit]

Name:	ifrs-full_TaxEffectOfRevenuesExemptFromTaxation2011
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

The product of the accounting profit multiplied by the applicable tax rate(s). [Refer: Accounting profit; Applicable tax rate]