NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Income	$ 341,543	$ 351,289
Other Comprehensive Income, Net of Tax:
Comprehensive Income Attributable to Common Shareholders	347,744	351,267	$ 861,644	$ 1,085,986
NSTAR Electric Company
Net Income	164,711	188,084	433,267	400,260
Other Comprehensive Income, Net of Tax:
Changes in Funded Status of SERP Benefit Plan	(35)	(61)	(100)	(132)
Qualified Cash Flow Hedging Instruments	5	5	15	15
Changes in Unrealized (Losses)/Gains on Marketable Securities	0	(6)	12	(19)
Other Comprehensive (Loss)/Income, Net of Tax	(30)	(62)	(73)	(136)
Comprehensive Income Attributable to Common Shareholders	$ 164,681	$ 188,022	$ 433,194	$ 400,124