v3.10.0.1

Derivative financial instruments, Breakdown of fair value amounts (Details) - Interest Rate Derivatives [Member] - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Euros [Member] |  |
Breakdown of fair value amount of derivative financial instruments [Abstract] |  |
Percent of notional amount of debt hedged in next 12 months | 100.00% |
Percentage of notional amount of debt hedged in year two | 75.00% |
Cash Flow Hedge [Member] |  |
Breakdown of fair value amount of derivative financial instruments [Abstract] |  |
Assets | $ 11,571 | $ 8,230
Liabilities | $ 279,152 | $ 329,731

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- Definition The percentage of the notional amount of the entity's debt hedged with interest rate swaps and options for next twelve months. + References No definition available. + Details
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Period Type: | duration

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- Definition The percentage of the notional amount of the entity's debt hedged with interest rate swaps and options for year two. + References No definition available. + Details
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Namespace Prefix: | aby_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 24A -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24A_a&doctype=Standard -URIDate 2018-03-16 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 24A -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24A_a&doctype=Standard -URIDate 2018-03-16 + Details
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Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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