v3.10.0.1

Corporate debt, Breakdown of corporate debt (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Corporate debt [Abstract]
Total Non-Current	$ 415,168	$ 574,176
Total Current	268,905	68,907
Credit Facilities with Financial Entities [Member]
Corporate debt [Abstract]
Total Non-Current	415,168	320,783
Total Current	11,580	65,833
Notes and Bonds [Member]
Corporate debt [Abstract]
Total Non-Current	0	253,393
Total Current	$ 257,325	$ 3,074

X

- Definition

The current portion of non-current credit facilities with financial entities, notes and bonds received at the corporate parent level.

+ References

No definition available.

+ Details

Name:	aby_CurrentPortionOfNoncurrentCreditFacilitiesNotesAndBondsReceived
Namespace Prefix:	aby_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The non-current portion of non-current credit facilities with financial entities, notes and bonds received at the corporate parent level.

+ References

No definition available.

+ Details

Name:	aby_NonCurrentPortionOfCreditFacilitiesNotesAndBondsReceived
Namespace Prefix:	aby_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_BorrowingsByNameAxis=aby_CreditFacilitiesWithFinancialEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_BorrowingsByNameAxis=aby_NotesAndBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: