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COMMON SHARES (Tables)
3 Months Ended
Mar. 31, 2022
Equity [Abstract]  
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 March 31, 2022 and December 31, 2021Issued as of
 Par ValueMarch 31, 2022December 31, 2021
Eversource$380,000,000 357,818,402 357,818,402 
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