NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Other Comprehensive Income, Net of Tax:
Comprehensive Income Attributable to Common Shareholders	$ 606,971	$ 553,311
NSTAR Electric Company
Net Income	165,950	167,175
Other Comprehensive Income, Net of Tax:
Changes in Funded Status of SERP Benefit Plan	(32)	(7)
Qualified Cash Flow Hedging Instruments	5	5
Other Comprehensive Loss, Net of Tax	(27)	(2)
Comprehensive Income Attributable to Common Shareholders	$ 165,923	$ 167,173