v3.10.0.1

Nature of the business, Description (Details) | Mar. 09, 2018
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Algonquin [Member] |
Nature of the business [Abstract] |
Ownership interest | 25.00%

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

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