CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Revenues	$ 1,988,512	$ 2,039,706	$ 5,856,458	$ 5,862,525
Operating Expenses:
Purchased Power, Fuel and Transmission	651,776	665,810	1,955,129	2,001,929
Operations and Maintenance	300,421	324,734	933,400	965,584
Depreciation	194,466	181,288	571,152	531,781
Amortization of Regulatory Assets, Net	41,848	43,942	58,058	56,223
Energy Efficiency Programs	129,205	149,121	391,761	405,962
Taxes Other Than Income Taxes	168,193	164,942	479,648	479,219
Total Operating Expenses	1,485,909	1,529,837	4,389,148	4,440,698
Operating Income/(Loss)	502,603	509,869	1,467,310	1,421,827
Interest Expense	108,719	99,865	319,477	298,568
Other Income, Net	21,184	13,641	56,304	23,689
Income Before Income Tax Expense	415,068	423,645	1,204,137	1,146,948
Income Tax Expense	152,818	156,446	447,921	428,186
Net Income	262,250	267,199	756,216	718,762
Net Income Attributable to Noncontrolling Interests	1,880	1,880	5,639	5,639
Net Income Attributable to Common Shareholders	$ 260,370	$ 265,319	$ 750,577	$ 713,123
Basic and Diluted Earnings Per Common Share (in dollars per share)	$ 0.82	$ 0.83	$ 2.36	$ 2.24
Dividends Declared Per Common Share (in dollars per share)	$ 0.48	$ 0.45	$ 1.43	$ 1.34
Weighted Average Common Shares Outstanding:
Basic (in shares)	317,393,029	317,787,836	317,415,848	317,696,823
Diluted (in shares)	317,949,396	318,577,079	318,007,042	318,511,609
The Connecticut Light And Power Company
Operating Revenues	$ 774,762	$ 760,037	$ 2,173,629	$ 2,175,141
Operating Expenses:
Purchased Power, Fuel and Transmission	259,005	253,509	711,154	760,613
Operations and Maintenance	123,107	123,034	359,834	356,409
Depreciation	63,727	57,675	184,275	172,175
Amortization of Regulatory Assets, Net	34,574	23,418	58,799	30,308
Energy Efficiency Programs	37,739	44,381	106,483	117,969
Taxes Other Than Income Taxes	79,067	81,948	223,482	227,981
Total Operating Expenses	597,219	583,965	1,644,027	1,665,455
Operating Income/(Loss)	177,543	176,072	529,602	509,686
Interest Expense	36,313	36,083	106,577	108,561
Other Income, Net	7,509	3,669	14,070	10,881
Income Before Income Tax Expense	148,739	143,658	437,095	412,006
Income Tax Expense	52,595	57,026	159,450	155,453
Net Income	96,144	86,632	277,645	256,553
NSTAR Electric Company
Operating Revenues	725,701	780,462	1,913,548	1,985,979
Operating Expenses:
Purchased Power, Fuel and Transmission	259,400	291,382	689,784	764,907
Operations and Maintenance	92,571	96,282	266,203	279,932
Depreciation	56,200	54,695	167,598	159,151
Amortization of Regulatory Assets, Net	9,845	9,621	17,806	18,275
Energy Efficiency Programs	71,615	84,717	198,803	212,882
Taxes Other Than Income Taxes	37,052	35,050	99,090	101,800
Total Operating Expenses	526,683	571,747	1,439,284	1,536,947
Operating Income/(Loss)	199,018	208,715	474,264	449,032
Interest Expense	24,488	21,101	69,962	62,206
Other Income, Net	3,426	5,022	8,703	7,524
Income Before Income Tax Expense	177,956	192,636	413,005	394,350
Income Tax Expense	69,796	75,440	161,320	154,493
Net Income	108,160	117,196	251,685	239,857
Public Service Company Of New Hampshire
Operating Revenues	250,032	266,946	733,572	727,753
Operating Expenses:
Purchased Power, Fuel and Transmission	57,099	59,833	179,289	155,700
Operations and Maintenance	63,669	64,183	191,153	187,184
Depreciation	32,084	29,646	95,266	86,524
Amortization of Regulatory Assets/(Liabilities), Net	2,835	14,158	(10,658)	14,490
Energy Efficiency Programs	4,007	3,983	11,040	10,862
Taxes Other Than Income Taxes	22,936	20,460	66,935	64,543
Total Operating Expenses	182,630	192,263	533,025	519,303
Operating Income/(Loss)	67,402	74,683	200,547	208,450
Interest Expense	12,896	12,397	38,676	37,386
Other Income, Net	1,229	574	2,883	1,007
Income Before Income Tax Expense	55,735	62,860	164,754	172,071
Income Tax Expense	22,012	24,345	65,128	66,242
Net Income	33,723	38,515	99,626	105,829
Western Massachusetts Electric Company
Operating Revenues	126,335	124,042	377,214	368,533
Operating Expenses:
Purchased Power, Fuel and Transmission	34,828	32,178	109,553	104,406
Operations and Maintenance	21,528	24,125	65,769	68,018
Depreciation	12,546	11,567	36,844	34,414
Amortization of Regulatory Assets/(Liabilities), Net	286	1,102	(563)	3,305
Energy Efficiency Programs	10,996	12,389	29,739	33,593
Taxes Other Than Income Taxes	10,779	10,609	31,403	30,440
Total Operating Expenses	90,963	91,970	272,745	274,176
Operating Income/(Loss)	35,372	32,072	104,469	94,357
Interest Expense	6,321	6,222	18,752	18,298
Other Income, Net	1,060	179	1,409	133
Income Before Income Tax Expense	30,111	26,029	87,126	76,192
Income Tax Expense	12,504	10,018	34,680	30,089
Net Income	$ 17,607	$ 16,011	$ 52,446	$ 46,103