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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other Comprehensive Income/(Loss), Net of Tax:
Comprehensive Income/(Loss) Attributable to Common Shareholders	$ 818,918	$ (436,556)	$ 1,407,729
NSTAR Electric Company
Net Income/(Loss)	636,353	544,528	492,428
Other Comprehensive Income/(Loss), Net of Tax:
Changes in Funded Status of SERP Benefit Plan	(205)	(272)	(221)
Qualified Cash Flow Hedging Instruments	20	20	20
Changes in Unrealized Gains/(Losses) on Marketable Securities	0	12	(16)
Other Comprehensive Income/(Loss), Net of Tax	(185)	(240)	(217)
Comprehensive Income/(Loss) Attributable to Common Shareholders	$ 636,168	$ 544,288	$ 492,211

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