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COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Noncontrolling Interest [Line Items]
Dividends on preferred stock	$ 7,519	$ 7,519	$ 7,519
Noncontrolling interest - preferred stock of subsidiaries	155,568	155,569
CL&P and NSTAR Electric
Noncontrolling Interest [Line Items]
Dividends on preferred stock	$ 7,500	$ 7,500	$ 7,500

X

- Definition

Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

+ References

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-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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-Topic 942
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- Definition

As of the reporting date, the carrying amount of noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. The noncontrolling interest holder's ownership (or holders' ownership) may be in the form of preferred shares (regardless of class), preferred partnership units (regardless of class), preferential membership interests, or any other form of preferred equity regardless of investee entity legal form.

+ References

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-Name Accounting Standards Codification
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