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COMMON SHARES (Tables)
6 Months Ended
Jun. 30, 2024
Equity [Abstract]  
Summary of Common Shares Authorized and Issued
The following table sets forth the Eversource parent common shares and the shares of common stock of CL&P, NSTAR Electric and PSNH that were authorized and issued, as well as the respective per share par values:  
 Shares
 Authorized as of June 30, 2024 and December 31, 2023Issued as of
 Par ValueJune 30, 2024December 31, 2023
Eversource$410,000,000 364,190,722 359,984,073 
CL&P$10 24,500,000 6,035,205 6,035,205 
NSTAR Electric$100,000,000 200 200 
PSNH$100,000,000 301 301