CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Revenues	$ 2,122,538	$ 1,953,128	$ 4,948,378	$ 4,326,854
Operating Expenses:
Purchased Power, Fuel and Transmission	650,087	630,132	1,648,578	1,506,703
Operations and Maintenance	411,147	332,055	876,689	674,117
Depreciation	274,647	240,516	545,352	476,727
Amortization	5,611	23,397	113,624	73,172
Energy Efficiency Programs	128,955	115,354	317,018	263,747
Taxes Other Than Income Taxes	200,486	178,019	409,944	359,613
Total Operating Expenses	1,670,933	1,519,473	3,911,205	3,354,079
Operating Income, Net	451,605	433,655	1,037,173	972,775
Interest Expense	145,435	134,285	283,201	269,000
Other Income, Net	46,619	30,243	80,820	54,347
Income Before Income Tax Expense	352,789	329,613	834,792	758,122
Income Tax Expense	86,389	75,501	200,370	167,379
Net Income	266,400	254,112	634,422	590,743
Net Income Attributable to Noncontrolling Interests	1,880	1,880	3,759	3,759
Net Income Attributable to Common Shareholders	$ 264,520	$ 252,232	$ 630,663	$ 586,984
Basic Earnings Per Common Share (in dollars per share)	$ 0.77	$ 0.75	$ 1.83	$ 1.75
Diluted Earnings Per Common Share (in dollars per share)	$ 0.77	$ 0.75	$ 1.83	$ 1.75
Weighted Average Common Shares Outstanding:
Basic (in shares)	343,844,626	337,946,663	343,761,435	334,524,452
Diluted (in shares)	344,435,696	338,561,649	344,385,193	335,749,404
The Connecticut Light and Power Company
Operating Revenues	$ 829,597	$ 817,421	$ 1,816,871	$ 1,717,124
Operating Expenses:
Purchased Power, Fuel and Transmission	308,137	315,398	681,411	690,115
Operations and Maintenance	152,394	134,633	327,814	270,230
Depreciation	84,423	79,718	167,828	158,152
Amortization of Regulatory (Liabilities)/Assets, Net	(15,059)	(5,698)	47,716	850
Energy Efficiency Programs	29,524	32,347	65,097	67,826
Taxes Other Than Income Taxes	83,886	79,867	175,278	162,855
Total Operating Expenses	643,305	636,265	1,465,144	1,350,028
Operating Income, Net	186,292	181,156	351,727	367,096
Interest Expense	42,614	38,722	81,592	76,605
Other Income, Net	9,879	8,459	14,787	10,357
Income Before Income Tax Expense	153,557	150,893	284,922	300,848
Income Tax Expense	38,001	33,622	70,967	64,839
Net Income	115,556	117,271	213,955	236,009
NSTAR Electric Company
Operating Revenues	687,375	660,971	1,424,418	1,394,804
Operating Expenses:
Purchased Power, Fuel and Transmission	191,137	192,304	417,615	434,742
Operations and Maintenance	136,356	115,831	279,576	238,149
Depreciation	83,917	79,520	166,710	157,865
Amortization of Regulatory (Liabilities)/Assets, Net	(2,528)	19,604	15,890	46,612
Energy Efficiency Programs	64,273	56,756	139,373	125,423
Taxes Other Than Income Taxes	54,126	50,583	108,776	99,306
Total Operating Expenses	527,281	514,598	1,127,940	1,102,097
Operating Income, Net	160,094	146,373	296,478	292,707
Interest Expense	37,195	32,955	69,501	63,972
Other Income, Net	21,915	13,112	38,727	25,350
Income Before Income Tax Expense	144,814	126,530	265,704	254,085
Income Tax Expense	33,902	29,062	60,868	56,228
Net Income	110,912	97,468	204,836	197,857
Public Service Company of New Hampshire
Operating Revenues	278,849	255,224	572,284	531,592
Operating Expenses:
Purchased Power, Fuel and Transmission	80,513	82,560	172,122	176,698
Operations and Maintenance	56,537	54,017	111,201	101,146
Depreciation	29,825	24,750	59,293	49,084
Amortization of Regulatory (Liabilities)/Assets, Net	26,274	11,563	44,821	31,673
Energy Efficiency Programs	9,365	8,786	19,713	18,150
Taxes Other Than Income Taxes	23,453	20,457	45,603	40,158
Total Operating Expenses	225,967	202,133	452,753	416,909
Operating Income, Net	52,882	53,091	119,531	114,683
Interest Expense	13,821	14,607	28,452	29,087
Other Income, Net	4,260	3,626	8,427	6,817
Income Before Income Tax Expense	43,321	42,110	99,506	92,413
Income Tax Expense	8,688	10,478	20,197	21,180
Net Income	$ 34,633	$ 31,632	$ 79,309	$ 71,233