v3.20.4

Project debt, Movement in project debt and Significant foreign currency denominated debts (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Project debt [Abstract] |  |  |
Project debt | $ 5,237,614 | $ 4,852,348 | $ 5,091,114
Euro [Member] |  |  |
Project debt [Abstract] |  |  |
Project debt | 2,240,811 | 1,882,618 |
South African Rand [Member] |  |  |
Project debt [Abstract] |  |  |
Project debt | 355,414 | 384,313 |
Algerian Dinar [Member] |  |  |
Project debt [Abstract] |  |  |
Project debt | 115,606 | 24,331 |
All Foreign Currencies [Member] |  |  |
Project debt [Abstract] |  |  |
Project debt | $ 2,711,830 | $ 2,291,262 |

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- Definition The current and non-current portions of project debt issued at the project level under project finance. + References No definition available. + Details
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Namespace Prefix: | aby_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

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- Details
Name: | srt_CurrencyAxis=currency_ZAR
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_CurrencyAxis=currency_DZD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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