v3.10.0.1

Equity (Details) $ / shares in Units, $ in Thousands |  |  |  | 6 Months Ended |
--- | --- | --- | --- | --- | ---
May 11, 2018 $ / shares | Mar. 09, 2018 | Feb. 27, 2018 $ / shares | Jun. 30, 2018 USD ($) Vote $ / shares shares | Dec. 31, 2017 USD ($)
Equity [Abstract] |  |  |  |  |
Share capital | $ |  |  |  | $ 10,022 | $ 10,022
Shares outstanding (in shares) | shares |  |  |  | 100,217,260 |
Nominal value per share (in dollars per share) | $ / shares |  |  |  | $ 0.10 |
Voting right per share | Vote |  |  |  | 1 |
Treasury shares held (in shares) | shares |  |  |  | 0 |
Increase (decrease) in treasury shares (in shares) | shares |  |  |  | 0 |
Fourth Quarter [Member] |  |  |  |  |
Equity [Abstract] |  |  |  |  |
Dividend declared and paid (in dollars per share) | $ / shares |  |  | $ 0.31 |  |
First Quarter [Member] |  |  |  |  |
Equity [Abstract] |  |  |  |  |
Dividend declared and paid (in dollars per share) | $ / shares | $ 0.32 |  |  |  |
Abengoa [Member] |  |  |  |  |
Equity [Abstract] |  |  |  |  |
Ownership interest |  | 16.50% |  | 16.47% |
Algonquin [Member] |  |  |  |  |
Equity [Abstract] |  |  |  |  |
Ownership interest |  | 25.00% |  |  |

X
- Definition The number of treasure shares purchased, sold, issued or cancelled during the period. + References No definition available. + Details
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Namespace Prefix: | aby_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interests in the entity held by non-controlling interests. + References No definition available. + Details
Name: | aby_ProportionOfOwnershipInterestsHeldByNoncontrollingInterestsInReportingEntity
Namespace Prefix: | aby_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of previously-issued common shares repurchased by the issuing entity and held in treasury. + References No definition available. + Details
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Namespace Prefix: | aby_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of voting rights granted for each share owned. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition The amount of dividends paid per ordinary share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 34 -IssueDate 2017-01-01 -Paragraph 16A -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=34&date=2017-03-01&anchor=para_16A_f&doctype=Standard -URIDate 2017-03-09 + Details
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Balance Type: | na
Period Type: | duration

X
- Definition The nominal value of capital issued. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_e&doctype=Standard -URIDate 2017-03-09 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_79_a_iv&doctype=Standard -URIDate 2017-03-09 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The nominal value per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 79 -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_79_a_iii&doctype=Standard -URIDate 2017-03-09 + Details
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Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
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- Details
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Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |