ACQUISITIONS - Spanish CSP Portfolio (Details) - Spanish CSP Portfolio € in Millions, $ in Millions		12 Months Ended
Feb. 11, 2020 USD ($) facility MW	Dec. 31, 2020 USD ($)	Feb. 11, 2020 EUR (€) facility MW
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired	100.00%		100.00%
Number of concentrated solar power facilities \| facility	2		2
Solar power capacity \| MW	100		100
Consideration transferred, acquisition-date fair value	$ 121		€ 111
Acquisition costs (less than)	$ 1
Revenue of combined entity as if combination occurred at beginning of period		$ 99

Acquisition Costs

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- Definition

Number Of Concentrated Solar Power Facilities

+ References

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- Definition

Solar Power Capacity

+ References

No definition available.

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- Definition

The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2021-01-01
-Paragraph B64
-Subparagraph f
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

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- Definition

The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2021-01-01
-Paragraph B64
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- Definition

The revenue of the combined entity as though the acquisition date for all business combinations that occurred during the year had been as of the beginning of the annual reporting period. [Refer: Business combinations [member]; Revenue]

+ References

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