CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Income	$ 291,260	$ 262,250	$ 807,332	$ 756,216
Other Comprehensive (Loss)/Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	432	519	1,627	1,567
Changes in Unrealized (Losses)/Gains on Marketable Securities	(136)	(1,872)	(724)	733
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	1,110	673	5,918	(633)
Net OCI	1,406	(680)	6,821	1,667
Comprehensive Income Attributable to Noncontrolling Interests	(1,880)	(1,880)	(5,639)	(5,639)
Comprehensive Income Attributable to Common Shareholders	290,786	259,690	808,514	752,244
The Connecticut Light and Power Company
Net Income	100,330	96,144	298,610	277,645
Other Comprehensive (Loss)/Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	(7)	96	58	298
Changes in Unrealized (Losses)/Gains on Marketable Securities	(5)	(64)	(21)	25
Net OCI	(12)	32	37	323
Comprehensive Income Attributable to Common Shareholders	100,318	96,176	298,647	277,968
NSTAR Electric Company
Net Income	140,595	125,766	305,666	304,130
Other Comprehensive (Loss)/Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	110	109	328	328
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1)	(18)	(6)	7
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	1	(4)	3	(12)
Net OCI	110	87	325	323
Comprehensive Income Attributable to Common Shareholders	140,705	125,853	305,991	304,453
Public Service Company of New Hampshire
Net Income	40,666	33,723	101,537	99,626
Other Comprehensive (Loss)/Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	268	291	835	872
Changes in Unrealized (Losses)/Gains on Marketable Securities	(7)	(112)	(36)	43
Net OCI	261	179	799	915
Comprehensive Income Attributable to Common Shareholders	$ 40,927	$ 33,902	$ 102,336	$ 100,541