v3.20.4

Project debt, Movement in project debt, split between cash and non-cash items (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Project debt [Abstract]
Beginning balance	$ 4,852,348	$ 5,091,114
Cash flow	(254,495)	(531,726)
Non-cash changes	639,763	292,960
Ending balance	$ 5,237,614	$ 4,852,348

X

- Definition

The current and non-current portions of project debt issued at the project level under project finance.

+ References

No definition available.

+ Details

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

X

- Definition

The change in current and non-current portions of project debt issued at the project level under project finance during the period - cash movement.

+ References

No definition available.

+ Details

Name:	aby_MovementInLongTermAndShortTermProjectDebtCashFlows
Namespace Prefix:	aby_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The change due to current and non-current portions of project debt issued at the project level under project finance during the period - non-cash movement.

+ References

No definition available.

+ Details

Name:	aby_MovementInLongTermAndShortTermProjectDebtNonCashCharges
Namespace Prefix:	aby_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	aby_ProjectDebtAbstract
Namespace Prefix:	aby_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration