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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
Beginning balance (in shares) at Dec. 31, 2023   349,540,266         200      
Balance as of Beginning of Period at Dec. 31, 2023 $ 14,173,892 $ 1,799,920 $ 8,460,876 $ 4,142,515 $ (33,737) $ 6,150,498 $ 0 $ 3,013,842 $ 3,136,612 $ 44
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net Income           159,977     159,977  
Dividends on Preferred Stock (1,880)     (1,880)   (490)     (490)  
Dividends on Common Stock (250,770)     (250,770)   (96,700)     (96,700)  
Capital Contributions from Eversource Parent           300,000   300,000    
Other Comprehensive Loss 5,200         (16)       (16)
Ending balance (in shares) at Mar. 31, 2024   351,379,414         200      
Balance as of End of Period at Mar. 31, 2024 $ 14,543,588 $ 1,806,385 8,537,591 4,413,593 (28,534) 6,513,269 $ 0 3,313,842 3,199,399 28
Beginning balance (in shares) at Dec. 31, 2024 366,608,052 366,608,052         200      
Balance as of Beginning of Period at Dec. 31, 2024 $ 15,039,387 $ 1,878,622 9,428,905 3,929,141 (26,472) 6,915,806 $ 0 3,788,842 3,127,105 (141)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net Income           167,175     167,175  
Dividends on Preferred Stock (1,880)     (1,880)   (490)     (490)  
Dividends on Common Stock (276,229)     (276,229)   (436,000)     (436,000)  
Capital Contributions from Eversource Parent           100,000   100,000    
Other Comprehensive Loss $ 2,500         (2)       (2)
Ending balance (in shares) at Mar. 31, 2025 367,307,083 367,307,083         200      
Balance as of End of Period at Mar. 31, 2025 $ 15,341,257 $ 1,878,622 $ 9,440,596 $ 4,203,700 $ (23,949) $ 6,746,489 $ 0 $ 3,888,842 $ 2,857,790 $ (143)