NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Income	$ 445,326	$ 368,023
Other Comprehensive Income (Loss), Net of Tax:
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	1,516	1,517
Qualified Cash Flow Hedging Instruments	5	407
Changes in Unrealized Losses on Marketable Securities	(817)	(736)
Net OCI	704	1,188
Comprehensive Income Attributable to Common Shareholders	444,150	367,331
NSTAR Electric Company
Net Income	92,739	93,924
Other Comprehensive Income (Loss), Net of Tax:
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	(44)	(41)
Qualified Cash Flow Hedging Instruments	5	109
Changes in Unrealized Losses on Marketable Securities	(8)	(7)
Net OCI	(47)	61
Comprehensive Income Attributable to Common Shareholders	$ 92,692	$ 93,985