NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Income	$ 493,039	$ 445,326
Other Comprehensive Income, Net of Tax:
Changes in Funded Status of SERP Benefit Plan	1,971	1,516
Qualified Cash Flow Hedging Instruments	5	5
Changes in Unrealized Gains/(Losses) on Marketable Securities	1,254	(817)
Other Comprehensive Income (Loss), Net of Tax	3,230	704
Comprehensive Income Attributable to Common Shareholders	494,389	444,150
NSTAR Electric Company
Net Income	133,813	92,739
Other Comprehensive Income, Net of Tax:
Changes in Funded Status of SERP Benefit Plan	(33)	(44)
Qualified Cash Flow Hedging Instruments	5	5
Changes in Unrealized Gains/(Losses) on Marketable Securities	12	(8)
Other Comprehensive Income (Loss), Net of Tax	(16)	(47)
Comprehensive Income Attributable to Common Shareholders	$ 133,797	$ 92,692