v3.25.2
COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Noncontrolling Interest [Line Items]              
Dividends on preferred stock $ 1,880 $ 1,880 $ 1,880 $ 1,880      
Noncontrolling interest attributed to preferred stock of subsidiaries 155,568       $ 155,568   $ 155,568
CL&P and NSTAR              
Noncontrolling Interest [Line Items]              
Dividends on preferred stock $ 1,900   $ 1,900   $ 3,800 $ 3,800