ACQUISITIONS - X-Elio (Details) - X-Elio € in Millions, $ in Millions	1 Months Ended
Dec. 31, 2019 EUR (€) MW	Dec. 31, 2019 USD ($) MW
Disclosure of detailed information about business combination [line items]
Proportion of ownership interest	50.00%
Solar power capacity	972	972
Amount of megawatts for assets under construction	1,000	1,000
Amount of megawatts for development pipeline	5,000	5,000
Economic interest in joint venture	12.50%
Investments in joint ventures	€ 124	$ 138

Amount Of Megawatts For Assets Under Construction

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- Definition

Amount Of Megawatts For Development Pipeline

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- Definition

Solar Power Capacity

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- Definition

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.

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The amount of investments in joint ventures in an entity's separate financial statements. [Refer: Joint ventures [member]]

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The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]]

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The proportion of the voting rights in a joint venture held by the entity. [Refer: Joint ventures [member]]

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