v3.8.0.1

Nature of the business, Financing arrangements (Details) - Abengoa [Member] |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 09, 2018 | Mar. 31, 2018 | Dec. 31, 2017
Financing arrangements [Abstract] |  |  |
Minimum ownership requirement percentage |  | 16.00% | 35.00%
Ownership interest | 16.50% | 16.47% |
Percentage of outstanding shares pledged as collateral |  | 16.44% |
Remaining ownership percentage |  | 16.47% |
Solana and Mojave [Member] |  |  |
Financing arrangements [Abstract] |  |  |
Minimum ownership requirement percentage | 16.00% | 16.00% |

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- References No definition available. + Details
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Namespace Prefix: | aby_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- 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

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- Definition The percentage of outstanding shares of the entity that are pledged as collateral under various financing arrangements. + References No definition available. + Details
Name: | aby_PercentageOfOutstandingSharesPledgedAsCollateral
Namespace Prefix: | aby_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- 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

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- Definition Refers to the remaining ownership percentage that entity intends to sell in a private transaction. + References No definition available. + Details
Name: | aby_RemainingOwnershipPercentageEntityIntendsToSell
Namespace Prefix: | aby_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | dei_LegalEntityAxis=aby_AbengoaSAMember
Namespace Prefix: |
Data Type: | na
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Period Type: |

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