v3.10.0.1

Nature of the business, Financing arrangements (Details) - Abengoa [Member]		9 Months Ended	12 Months Ended
	Mar. 09, 2018	Sep. 30, 2018	Dec. 31, 2017
Financing arrangements [Abstract]
Minimum ownership requirement percentage		16.00%	35.00%
Ownership interest	16.50%	16.47%
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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- 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
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- Definition

The proportion of ownership interests in the entity held by non-controlling interests.

+ References

No definition available.

+ Details

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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

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- Details

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