CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net Income	$ 285,046	$ 348,140	$ 919,468	$ 938,883
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	115	602	967	1,218
Changes in Unrealized (Losses)/Gains on Marketable Securities	(106)	(134)	(569)	295
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	2,468	1,693	4,148	3,149
Net OCI	2,477	2,161	4,546	4,662
Comprehensive Income Attributable to Noncontrolling Interests	(1,880)	(1,880)	(5,639)	(5,639)
Comprehensive Income Attributable to Common Shareholders	285,643	348,421	918,375	937,906
The Connecticut Light and Power Company
Net Income	70,153	120,097	284,107	356,106
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	(7)	(7)	(20)	(20)
Changes in Unrealized (Losses)/Gains on Marketable Securities	(2)	(4)	(18)	11
Net OCI	(9)	(11)	(38)	(9)
Comprehensive Income Attributable to Common Shareholders	70,144	120,086	284,069	356,097
NSTAR Electric Company
Net Income	177,451	165,728	382,287	363,585
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	5	109	293	327
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1)	(1)	(5)	2
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	(40)	(43)	(122)	(129)
Net OCI	(36)	65	166	200
Comprehensive Income Attributable to Common Shareholders	177,415	165,793	382,453	363,785
Public Service Company of New Hampshire
Net Income	44,143	47,151	123,452	118,384
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	109	268	673	806
Changes in Unrealized (Losses)/Gains on Marketable Securities	(6)	(8)	(33)	17
Net OCI	103	260	640	823
Comprehensive Income Attributable to Common Shareholders	$ 44,246	$ 47,411	$ 124,092	$ 119,207