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INVESTMENTS IN UNCONSOLIDATED AFFILIATES - Narrative (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) company | Dec. 31, 2020 USD ($) company | Dec. 31, 2019 USD ($) | Feb. 08, 2019
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity in earnings of unconsolidated affiliates, net of impairment | $ 14,200 | $ 14,200 | $ 42,200 |
Dividends received from equity method investees | $ 21,600 | $ 21,800 | 48,900 |
Number of companies that transmit hydro electricity imported from The Hydro-Quebec System in Canada | company | 2 | 2 |  |
Payments to acquire investments | $ 327,385 | $ 239,673 | $ 416,337 |
Offshore Wind Business - North East Offshore |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Carrying amount of equity method investments in excess of the underlying equity in net assets | 300,400 | $ 264,100 |  |
Goodwill | $ 168,900 |  |  |
Ownership interest | 50.00% |  |  |
Revolution Wind And South Fork Wind |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership interest |  |  |  | 50.00%
Hydro-Quebec System |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership interest | 14.50% | 14.50% |  |
Payments to acquire investments | $ 9,000 | $ 8,600 |  |
Renewable Energy Fund |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Other-than-temporary impairment |  | $ 2,800 |  |

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- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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