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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Capital Surplus, Paid In
Retained Earnings
Accumulated Other Comprehensive Loss
NSTAR Electric
NSTAR Electric
Common Stock
NSTAR Electric
Capital Surplus, Paid In
NSTAR Electric
Retained Earnings
NSTAR Electric
Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2020   342,954,023         200      
Balance at Dec. 31, 2020 $ 14,063,566 $ 1,789,092 $ 8,015,663 $ 4,613,201 $ (76,411) $ 4,521,418 $ 0 $ 1,993,942 $ 2,527,167 $ 309
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net Income 368,023     368,023   93,924     93,924  
Dividends on Preferred Stock (1,880)     (1,880)   (490)     (490)  
Dividends on Common Stock (206,913)     (206,913)   (206,400)     (206,400)  
Other Comprehensive (Loss)/Income, Net of Tax 1,188       1,188 61       61
Balance (in shares) at Mar. 31, 2021   343,434,298         200      
Balance at Mar. 31, 2021 $ 14,233,420 $ 1,789,092 8,016,118 4,772,431 (75,223) 4,408,513 $ 0 1,993,942 2,414,201 370
Balance (in shares) at Dec. 31, 2021 344,403,196 344,403,196         200      
Balance at Dec. 31, 2021 $ 14,599,844 $ 1,789,092 8,098,514 5,005,391 (42,275) 4,973,019 $ 0 2,253,942 2,718,576 501
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net Income 445,326     445,326   92,739     92,739  
Dividends on Preferred Stock (1,880)     (1,880)   (490)     (490)  
Dividends on Common Stock (219,768)     (219,768)   (71,900)     (71,900)  
Other Comprehensive (Loss)/Income, Net of Tax $ 704       704 (47)       (47)
Balance (in shares) at Mar. 31, 2022 344,850,272 344,850,272         200      
Balance at Mar. 31, 2022 $ 14,836,690 $ 1,789,092 $ 8,102,618 $ 5,229,069 $ (41,571) $ 4,993,321 $ 0 $ 2,253,942 $ 2,738,925 $ 454