INVESTMENTS IN UNCONSOLIDATED AFFILIATES - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) company	Dec. 31, 2024 USD ($) company	Dec. 31, 2023 USD ($)	Feb. 13, 2024
Schedule of Equity Method Investments [Line Items]
Equity in Earnings/(Losses) of Subsidiaries			$ 19,900	$ 51,900	$ 15,500
Dividends received from equity method investees			20,700	20,500	20,100
Payments to acquire investments			701	929,688	1,680,473
Losses on Offshore Wind			284,000	464,019	2,167,000
Equity method investment, other than temporary impairment, after tax					1,950,000
Proceeds from sale, land, held-for-investment					318,000
Proceeds from Sales of Offshore Wind Investments			$ 0	$ 862,713	1,090,662
Number of companies that transmit hydro electricity imported from The Hydro-Quebec System in Canada | company			2	2
Tax Equity Investment in South Fork Wind
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)			100.00%
Investment tax credit				$ 459,000
Tax Equity Capital Contribution Agreement
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	100.00%
Payments to acquire investments	$ 528,000
North East Offshore and South Fork Class B Member, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)				50.00%
South Fork Wind And Revolution Wind
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)		50.00%				50.00%
Losses on Offshore Wind				$ 464,000
Equity method investment, other than temporary impairment, after tax				524,000
Proceeds from Sales of Offshore Wind Investments		$ 745,000
Uncommitted Lease Area
Schedule of Equity Method Investments [Line Items]
Payments to acquire investments				$ 863,000	$ 625,000
South Fork Wind, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)			50.00%		50.00%
Renewable Energy Investment Fund
Schedule of Equity Method Investments [Line Items]
Proceeds from Sales of Offshore Wind Investments					$ 147,600
Renewable Energy Investment Fund | Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Payments for charitable contributions					$ 20,000
Hydro-Quebec System
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)			14.50%	14.50%
Payments to acquire investments			$ 12,200	$ 11,500