ACQUISITIONS - Northern Ireland Wind (Details) - Northern Ireland Wind £ in Millions, $ in Millions	1 Months Ended
Mar. 31, 2018 USD ($)	Oct. 31, 2018 GBP (£)	Oct. 31, 2018 USD ($)
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired	100.00%
Consideration transferred, acquisition-date fair value		£ 22	$ 28
Percentage of voting equity interests retained by Brookfield		40.00%	40.00%
Acquisition costs (less than)	$ 1

Business Combination, Acquisition Related Costs1

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- Definition

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

+ 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
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-IssueDate 2018-01-01
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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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
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-IssueDate 2018-01-01
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