CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Income	$ 336,633	$ 310,558
Other Comprehensive Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	229	316
Changes in Unrealized Gains on Marketable Securities	160	655
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	1,559	1,225
Other Comprehensive Income (Loss), Net of Tax	1,948	2,196
Comprehensive Income Attributable to Noncontrolling Interests	(1,880)	(1,880)
Comprehensive Income Attributable to Common Shareholders	336,701	310,874
The Connecticut Light and Power Company
Net Income	118,738	110,471
Other Comprehensive Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	(7)	(6)
Changes in Unrealized Gains on Marketable Securities	6	23
Other Comprehensive Income (Loss), Net of Tax	(1)	17
Comprehensive Income Attributable to Common Shareholders	118,737	110,488
NSTAR Electric Company
Net Income	100,390	94,014
Other Comprehensive Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	109	110
Changes in Unrealized Gains on Marketable Securities	1	6
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	(43)	1
Other Comprehensive Income (Loss), Net of Tax	67	117
Comprehensive Income Attributable to Common Shareholders	100,457	94,131
Public Service Company of New Hampshire
Net Income	39,601	32,781
Other Comprehensive Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	269	269
Changes in Unrealized Gains on Marketable Securities	9	38
Other Comprehensive Income (Loss), Net of Tax	278	307
Comprehensive Income Attributable to Common Shareholders	$ 39,879	$ 33,088