Eversource Energy (ES) 10-Q 4 Aug 22 2022 Q2 Quarterly report Financial data

COVER PAGE

COVER PAGE - shares	6 Months Ended
	Jun. 30, 2022	Jul. 31, 2022
Document And Entity [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity Registrant Name	EVERSOURCE ENERGY
Entity Incorporation, State or Country Code	MA
Entity Address, Address Line One	300 Cadwell Drive
Entity Address, City or Town	Springfield
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01104
City Area Code	800
Local Phone Number	286-5000
Entity File Number	001-05324
Entity Tax Identification Number	04-2147929
Title of 12(b) Security	Common Shares, $5.00 par value per share
Trading Symbol	ES
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Smaller Reporting Company	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		346,443,316
Entity Central Index Key	0000072741
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false
The Connecticut Light and Power Company
Document And Entity [Line Items]
Entity Registrant Name	THE CONNECTICUT LIGHT AND POWER COMPANY
Entity Incorporation, State or Country Code	CT
Entity Address, Address Line One	107 Selden Street
Entity Address, City or Town	Berlin
Entity Address, State or Province	CT
Entity Address, Postal Zip Code	06037-1616
City Area Code	800
Local Phone Number	286-5000
Entity File Number	000-00404
Entity Tax Identification Number	06-0303850
Entity Filer Category	Non-accelerated Filer
Entity Smaller Reporting Company	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		6,035,205
Entity Central Index Key	0000023426
Current Fiscal Year End Date	--12-31
NSTAR Electric Company
Document And Entity [Line Items]
Entity Registrant Name	NSTAR ELECTRIC COMPANY
Entity Incorporation, State or Country Code	MA
Entity Address, Address Line One	800 Boylston Street
Entity Address, City or Town	Boston
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	02199
City Area Code	800
Local Phone Number	286-5000
Entity File Number	001-02301
Entity Tax Identification Number	04-1278810
Entity Filer Category	Non-accelerated Filer
Entity Smaller Reporting Company	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		200
Entity Central Index Key	0000013372
Current Fiscal Year End Date	--12-31
Public Service Company of New Hampshire
Document And Entity [Line Items]
Entity Registrant Name	PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE
Entity Incorporation, State or Country Code	NH
Entity Address, Address Line One	Energy Park
Entity Address, Address Line Two	780 North Commercial Street
Entity Address, City or Town	Manchester
Entity Address, State or Province	NH
Entity Address, Postal Zip Code	03101-1134
City Area Code	800
Local Phone Number	286-5000
Entity File Number	001-06392
Entity Tax Identification Number	02-0181050
Entity Filer Category	Non-accelerated Filer
Entity Smaller Reporting Company	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		301
Entity Central Index Key	0000315256
Current Fiscal Year End Date	--12-31

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 29,540	$ 66,773
Receivables, Net (net of allowance for uncollectible accounts)	1,345,904	1,226,069
Unbilled Revenues	177,472	210,879
Fuel, Materials, Supplies and REC Inventory	262,421	267,547
Regulatory Assets	1,163,411	1,129,093
Prepayments and Other Current Assets	289,295	369,759
Total Current Assets	3,268,043	3,270,120
Property, Plant and Equipment, Net	34,407,210	33,377,650
Deferred Debits and Other Assets:
Total Long-Term Regulatory Assets	4,569,236	4,586,709
Goodwill	4,477,756	4,477,269
Investments in Unconsolidated Affiliates	1,719,878	1,436,293
Prepaid Pension and PBOP	446,780	271,987
Marketable Securities	400,516	460,347
Other Long-Term Assets	626,821	611,769
Total Deferred Debits and Other Assets	12,240,987	11,844,374
Total Assets	49,916,240	48,492,144
Current Liabilities:
Notes Payable	98,800	1,505,450
Long-Term Debt – Current Portion	1,265,463	1,193,097
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	1,353,506	1,672,230
Regulatory Liabilities	759,733	602,432
Other Current Liabilities	739,833	830,620
Total Current Liabilities	4,260,545	5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	4,770,063	4,597,120
Regulatory Liabilities	3,886,914	3,866,251
Derivative Liabilities	188,736	235,387
Asset Retirement Obligations	505,055	500,111
Accrued Pension, SERP and PBOP	194,546	242,463
Other Long-Term Liabilities	881,729	971,080
Total Deferred Credits and Other Liabilities	10,427,043	10,412,412
Long-Term Debt	19,583,770	17,023,577
Rate Reduction Bonds	432,097	453,702
Noncontrolling Interest – Preferred Stock of Subsidiaries	155,570	155,570
Common Shareholders' Equity:
Common Shares	1,796,056	1,789,092
Capital Surplus, Paid In	8,242,346	8,098,514
Retained Earnings	5,301,054	5,005,391
Accumulated Other Comprehensive (Loss)/Income	(42,864)	(42,275)
Treasury Stock	(239,377)	(250,878)
Common Shareholders' Equity	15,057,215	14,599,844
Commitments and Contingencies (Note 9)
Total Liabilities and Capitalization	$ 49,916,240	$ 48,492,144

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for uncollectible accounts	$ 457,846	$ 417,406

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Operating Revenues	$ 2,572,641	$ 2,122,538	$ 6,043,951	$ 4,948,378
Operating Expenses:
Purchased Power, Fuel and Transmission	940,541	650,087	2,330,237	1,648,578
Operations and Maintenance	452,174	411,147	924,608	876,689
Depreciation	294,238	274,647	583,568	545,352
Amortization	70,409	5,611	307,357	113,624
Energy Efficiency Programs	136,679	128,955	336,163	317,018
Taxes Other Than Income Taxes	223,031	200,486	443,395	409,944
Total Operating Expenses	2,117,072	1,670,933	4,925,328	3,911,205
Operating Income	455,569	451,605	1,118,623	1,037,173
Interest Expense	160,090	145,435	313,334	283,201
Other Income, Net	93,861	46,619	165,422	80,820
Income Before Income Tax Expense	389,340	352,789	970,711	834,792
Income Tax Expense	95,598	86,389	231,643	200,370
Net Income	293,742	266,400	739,068	634,422
Net Income Attributable to Noncontrolling Interests	1,880	1,880	3,759	3,759
Net Income Attributable to Common Shareholders	$ 291,862	$ 264,520	$ 735,309	$ 630,663
Basic EPS (in dollars per share)	$ 0.84	$ 0.77	$ 2.13	$ 1.83
Diluted EPS (in dollars per share)	$ 0.84	$ 0.77	$ 2.13	$ 1.83
Weighted Average Common Shares Outstanding:
Basic (in shares)	345,893,714	343,844,626	345,525,030	343,761,435
Diluted (in shares)	346,295,478	344,435,696	345,978,306	344,385,193

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 293,742	$ 266,400	$ 739,068	$ 634,422
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	5	445	10	852
Changes in Unrealized (Losses)/Gains on Marketable Securities	(505)	273	(1,323)	(463)
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	(793)	163	724	1,680
Net OCI	(1,293)	881	(589)	2,069
Comprehensive Income Attributable to Noncontrolling Interests	(1,880)	(1,880)	(3,759)	(3,759)
Comprehensive Income Attributable to Common Shareholders	$ 290,569	$ 265,401	$ 734,720	$ 632,732

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Capital Surplus, Paid In	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Balance (in shares) at Dec. 31, 2020		342,954,023
Balance at Dec. 31, 2020	$ 14,063,566	$ 1,789,092	$ 8,015,663	$ 4,613,201	$ (76,411)	$ (277,979)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	368,023			368,023
Dividends on Common Stock	(206,913)			(206,913)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	(15,727)		(15,727)
Issuance of Treasury Shares (in shares)		480,275
Issuance of Treasury Shares	25,163		16,182			8,981
Other Comprehensive (Loss)/Income, Net of Tax	1,188				1,188
Balance (in shares) at Mar. 31, 2021		343,434,298
Balance at Mar. 31, 2021	14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	(268,998)
Balance (in shares) at Dec. 31, 2020		342,954,023
Balance at Dec. 31, 2020	14,063,566	$ 1,789,092	8,015,663	4,613,201	(76,411)	(277,979)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	634,422
Dividends on Preferred Stock	(3,800)
Other Comprehensive (Loss)/Income, Net of Tax	2,069
Balance (in shares) at Jun. 30, 2021		343,601,103
Balance at Jun. 30, 2021	14,311,889	$ 1,789,092	8,032,959	4,830,058	(74,342)	(265,878)
Balance (in shares) at Mar. 31, 2021		343,434,298
Balance at Mar. 31, 2021	14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	(268,998)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	266,400			266,400
Dividends on Common Stock	(206,893)			(206,893)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	6,162		6,162
Issuance of Treasury Shares (in shares)		166,805
Issuance of Treasury Shares	13,799		10,679			3,120
Other Comprehensive (Loss)/Income, Net of Tax	881				881
Balance (in shares) at Jun. 30, 2021		343,601,103
Balance at Jun. 30, 2021	$ 14,311,889	$ 1,789,092	8,032,959	4,830,058	(74,342)	(265,878)
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	(250,878)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	445,326			445,326
Dividends on Common Stock	(219,768)			(219,768)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	(16,538)		(16,538)
Issuance of Treasury Shares (in shares)		447,076
Issuance of Treasury Shares	29,002		20,642			8,360
Other Comprehensive (Loss)/Income, Net of Tax	704				704
Balance (in shares) at Mar. 31, 2022		344,850,272
Balance at Mar. 31, 2022	$ 14,836,690	$ 1,789,092	8,102,618	5,229,069	(41,571)	(242,518)
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	(250,878)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	739,068
Dividends on Preferred Stock	(3,800)
Other Comprehensive (Loss)/Income, Net of Tax	$ (589)
Balance (in shares) at Jun. 30, 2022	346,411,029	346,411,029
Balance at Jun. 30, 2022	$ 15,057,215	$ 1,796,056	8,242,346	5,301,054	(42,864)	(239,377)
Balance (in shares) at Mar. 31, 2022		344,850,272
Balance at Mar. 31, 2022	14,836,690	$ 1,789,092	8,102,618	5,229,069	(41,571)	(242,518)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	293,742			293,742
Dividends on Common Stock	(219,877)			(219,877)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		1,392,804
Issuance of Common Shares	128,106	$ 6,964	121,142
Long-Term Incentive Plan Activity	9,070		9,070
Issuance of Treasury Shares (in shares)		167,953
Issuance of Treasury Shares	14,481		11,340			3,141
Capital Stock Expense	(1,824)		(1,824)
Other Comprehensive (Loss)/Income, Net of Tax	$ (1,293)				(1,293)
Balance (in shares) at Jun. 30, 2022	346,411,029	346,411,029
Balance at Jun. 30, 2022	$ 15,057,215	$ 1,796,056	$ 8,242,346	$ 5,301,054	$ (42,864)	$ (239,377)

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021
Statement of Stockholders' Equity [Abstract]
Dividends on Common Shares (in dollars per share)	$ 0.6375	$ 0.6375	$ 0.6025	$ 0.6025
Par value (in dollars per share)	$ 5

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net Income	$ 739,068	$ 634,422
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	583,568	545,352
Deferred Income Taxes	126,970	120,390
Uncollectible Expense	30,032	27,683
Pension, SERP and PBOP Income, Net	(80,404)	(6,391)
Pension and PBOP Contributions	(52,400)	(72,400)
Regulatory (Under)/Over Recoveries, Net	(226,238)	18,252
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	(64,909)	28,583
Amortization	307,357	113,624
Cost of Removal Expenditures	(169,863)	(95,593)
Other	(75,916)	(58,472)
Changes in Current Assets and Liabilities:
Accounts Receivables from Subsidiaries	(176,132)	(85,261)
Taxes Receivable/Accrued, Net	85,071	(9,113)
Accounts Payable	(83,550)	(285,670)
Other Current Assets and Liabilities, Net	(100,835)	(67,961)
Net Cash Flows Provided by Operating Activities	841,819	807,445
Investing Activities:
Investments in Property, Plant and Equipment	(1,549,081)	(1,423,223)
Proceeds from Sales of Marketable Securities	168,997	253,842
Purchases of Marketable Securities	(152,741)	(240,729)
Investments in Unconsolidated Affiliates, Net	(277,001)	(100,527)
Other Investing Activities	10,771	12,661
Net Cash Flows Used in Investing Activities	(1,799,055)	(1,497,976)
Financing Activities:
Proceeds from issuance of common shares, net of issuance costs	126,282	0
Cash Dividends on Common Shares	(427,931)	(402,211)
Cash Dividends on Preferred Stock	(3,759)	(3,759)
(Decrease)/Increase in Notes Payable	(1,317,950)	753,175
Repayment of Rate Reduction Bonds	(21,605)	(21,605)
Issuance of Long-Term Debt	3,350,000	1,525,000
Retirement of Long-Term Debt	(770,000)	(1,022,000)
Other Financing Activities	(42,133)	(35,008)
Net Cash Flows Provided by/(Used in) Financing Activities	892,904	793,592
Net (Decrease)/Increase in Cash and Restricted Cash	(64,332)	103,061
Cash and Restricted Cash - Beginning of Period	221,008	264,950
Cash and Restricted Cash - End of Period	$ 156,676	$ 368,011

THE CONNECTICUT LIGHT AND POWER

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 29,540	$ 66,773
Receivables, Net (net of allowance for uncollectible accounts)	1,345,904	1,226,069
Unbilled Revenues	177,472	210,879
Fuel, Materials, Supplies and REC Inventory	262,421	267,547
Regulatory Assets	1,163,411	1,129,093
Prepayments and Other Current Assets	289,295	369,759
Total Current Assets	3,268,043	3,270,120
Property, Plant and Equipment, Net	34,407,210	33,377,650
Deferred Debits and Other Assets:
Total Long-Term Regulatory Assets	4,569,236	4,586,709
Other Long-Term Assets	626,821	611,769
Total Deferred Debits and Other Assets	12,240,987	11,844,374
Total Assets	49,916,240	48,492,144
Current Liabilities:
Long-Term Debt – Current Portion	1,265,463	1,193,097
Accounts Payable	1,353,506	1,672,230
Regulatory Liabilities	759,733	602,432
Other Current Liabilities	739,833	830,620
Total Current Liabilities	4,260,545	5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	4,770,063	4,597,120
Regulatory Liabilities	3,886,914	3,866,251
Derivative Liabilities	188,736	235,387
Other Long-Term Liabilities	881,729	971,080
Total Deferred Credits and Other Liabilities	10,427,043	10,412,412
Long-Term Debt	19,583,770	17,023,577
Noncontrolling Interest – Preferred Stock of Subsidiaries	155,570	155,570
Common Shareholders' Equity:
Common Shares	1,796,056	1,789,092
Capital Surplus, Paid In	8,242,346	8,098,514
Retained Earnings	5,301,054	5,005,391
Accumulated Other Comprehensive Income	(42,864)	(42,275)
Common Shareholders' Equity	15,057,215	14,599,844
Commitments and Contingencies (Note 9)
Total Liabilities and Capitalization	49,916,240	48,492,144
The Connecticut Light and Power Company
Current Assets:
Cash	9,203	55,804
Receivables, Net (net of allowance for uncollectible accounts)	596,847	447,774
Accounts Receivable from Affiliated Companies	39,881	43,944
Unbilled Revenues	52,711	56,787
Fuel, Materials, Supplies and REC Inventory	75,004	60,264
Regulatory Assets	396,447	371,609
Prepayments and Other Current Assets	74,350	120,257
Total Current Assets	1,244,443	1,156,439
Property, Plant and Equipment, Net	11,090,981	10,803,543
Deferred Debits and Other Assets:
Total Long-Term Regulatory Assets	1,663,820	1,713,161
Other Long-Term Assets	307,045	276,513
Total Deferred Debits and Other Assets	1,970,865	1,989,674
Total Assets	14,306,289	13,949,656
Current Liabilities:
Notes Payable to Eversource Parent	67,500	0
Long-Term Debt – Current Portion	400,000	0
Accounts Payable	450,260	533,454
Accounts Payable to Affiliated Companies	92,316	132,578
Regulatory Liabilities	337,240	266,489
Derivative Liabilities	75,872	73,528
Other Current Liabilities	140,253	141,955
Total Current Liabilities	1,563,441	1,148,004
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,594,027	1,562,102
Regulatory Liabilities	1,217,711	1,193,259
Derivative Liabilities	188,736	235,387
Other Long-Term Liabilities	180,950	179,824
Total Deferred Credits and Other Liabilities	3,181,424	3,170,572
Long-Term Debt	3,815,946	4,215,379
Noncontrolling Interest – Preferred Stock of Subsidiaries	116,200	116,200
Common Shareholders' Equity:
Common Shares	60,352	60,352
Capital Surplus, Paid In	3,210,765	3,010,765
Retained Earnings	2,357,968	2,228,133
Accumulated Other Comprehensive Income	193	251
Common Shareholders' Equity	5,629,278	5,299,501
Commitments and Contingencies (Note 9)
Total Liabilities and Capitalization	$ 14,306,289	$ 13,949,656

THE CONNECTICUT LIGHT AND POW_2

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Allowance for uncollectible accounts	$ 457,846	$ 417,406
The Connecticut Light and Power Company
Allowance for uncollectible accounts	$ 192,744	$ 181,319

THE CONNECTICUT LIGHT AND POW_3

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues	$ 2,572,641	$ 2,122,538	$ 6,043,951	$ 4,948,378
Operating Expenses:
Purchased Power, Fuel and Transmission	940,541	650,087	2,330,237	1,648,578
Operations and Maintenance	452,174	411,147	924,608	876,689
Depreciation	294,238	274,647	583,568	545,352
Energy Efficiency Programs	136,679	128,955	336,163	317,018
Taxes Other Than Income Taxes	223,031	200,486	443,395	409,944
Total Operating Expenses	2,117,072	1,670,933	4,925,328	3,911,205
Operating Income	455,569	451,605	1,118,623	1,037,173
Interest Expense	160,090	145,435	313,334	283,201
Other Income, Net	93,861	46,619	165,422	80,820
Income Before Income Tax Expense	389,340	352,789	970,711	834,792
Income Tax Expense	95,598	86,389	231,643	200,370
Net Income	293,742	266,400	739,068	634,422
The Connecticut Light and Power Company
Operating Revenues	1,035,682	829,597	2,321,514	1,816,871
Operating Expenses:
Purchased Power, Fuel and Transmission	421,000	308,137	944,463	681,411
Operations and Maintenance	169,004	152,394	326,065	327,814
Depreciation	88,233	84,423	175,498	167,828
Amortization of Regulatory Assets/(Liabilities), Net	42,772	(15,059)	212,522	47,716
Energy Efficiency Programs	29,780	29,524	65,177	65,097
Taxes Other Than Income Taxes	95,778	83,886	186,151	175,278
Total Operating Expenses	846,567	643,305	1,909,876	1,465,144
Operating Income	189,115	186,292	411,638	351,727
Interest Expense	42,175	42,614	82,761	81,592
Other Income, Net	19,800	9,879	39,363	14,787
Income Before Income Tax Expense	166,740	153,557	368,240	284,922
Income Tax Expense	40,902	38,001	89,426	70,967
Net Income	$ 125,838	$ 115,556	$ 278,814	$ 213,955

THE CONNECTICUT LIGHT AND POW_4

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income	$ 293,742	$ 266,400	$ 739,068	$ 634,422
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	5	445	10	852
Changes in Unrealized (Losses)/Gains on Marketable Securities	(505)	273	(1,323)	(463)
Net OCI	(1,293)	881	(589)	2,069
Comprehensive Income Attributable to Common Shareholders	290,569	265,401	734,720	632,732
The Connecticut Light and Power Company
Net Income	125,838	115,556	278,814	213,955
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	(7)	(6)	(13)	(13)
Changes in Unrealized (Losses)/Gains on Marketable Securities	(16)	9	(45)	(16)
Net OCI	(23)	3	(58)	(29)
Comprehensive Income Attributable to Common Shareholders	$ 125,815	$ 115,559	$ 278,756	$ 213,926

THE CONNECTICUT LIGHT AND POW_5

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus, Paid In	Retained Earnings	Accumulated Other Comprehensive Loss	The Connecticut Light and Power Company	The Connecticut Light and Power Company Common Stock	The Connecticut Light and Power Company Capital Surplus, Paid In	The Connecticut Light and Power Company Retained Earnings	The Connecticut Light and Power Company Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2020		342,954,023					6,035,205
Balance at Dec. 31, 2020	$ 14,063,566	$ 1,789,092	$ 8,015,663	$ 4,613,201	$ (76,411)	$ 5,044,786	$ 60,352	$ 2,810,765	$ 2,173,367	$ 302
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	368,023			368,023		98,398			98,398
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(206,913)			(206,913)		(70,100)			(70,100)
Other Comprehensive (Loss)/Income, Net of Tax	1,188				1,188	(32)				(32)
Balance (in shares) at Mar. 31, 2021		343,434,298					6,035,205
Balance at Mar. 31, 2021	14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	5,071,662	$ 60,352	2,810,765	2,200,275	270
Balance (in shares) at Dec. 31, 2020		342,954,023					6,035,205
Balance at Dec. 31, 2020	14,063,566	$ 1,789,092	8,015,663	4,613,201	(76,411)	5,044,786	$ 60,352	2,810,765	2,173,367	302
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	634,422					213,955
Dividends on Preferred Stock	(3,800)
Other Comprehensive (Loss)/Income, Net of Tax	2,069					(29)
Balance (in shares) at Jun. 30, 2021		343,601,103					6,035,205
Balance at Jun. 30, 2021	14,311,889	$ 1,789,092	8,032,959	4,830,058	(74,342)	5,115,731	$ 60,352	2,810,765	2,244,341	273
Balance (in shares) at Mar. 31, 2021		343,434,298					6,035,205
Balance at Mar. 31, 2021	14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	5,071,662	$ 60,352	2,810,765	2,200,275	270
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	266,400			266,400		115,556			115,556
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(206,893)			(206,893)		(70,100)			(70,100)
Other Comprehensive (Loss)/Income, Net of Tax	881				881	3				3
Balance (in shares) at Jun. 30, 2021		343,601,103					6,035,205
Balance at Jun. 30, 2021	$ 14,311,889	$ 1,789,092	8,032,959	4,830,058	(74,342)	5,115,731	$ 60,352	2,810,765	2,244,341	273
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196					6,035,205
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	5,299,501	$ 60,352	3,010,765	2,228,133	251
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	445,326			445,326		152,977			152,977
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(219,768)			(219,768)		(73,100)			(73,100)
Capital Contributions from Eversource Parent						100,000		100,000
Other Comprehensive (Loss)/Income, Net of Tax	704				704	(35)				(35)
Balance (in shares) at Mar. 31, 2022		344,850,272					6,035,205
Balance at Mar. 31, 2022	$ 14,836,690	$ 1,789,092	8,102,618	5,229,069	(41,571)	5,477,953	$ 60,352	3,110,765	2,306,620	216
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196					6,035,205
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	5,299,501	$ 60,352	3,010,765	2,228,133	251
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	739,068					278,814
Dividends on Preferred Stock	(3,800)
Other Comprehensive (Loss)/Income, Net of Tax	$ (589)					(58)
Balance (in shares) at Jun. 30, 2022	346,411,029	346,411,029					6,035,205
Balance at Jun. 30, 2022	$ 15,057,215	$ 1,796,056	8,242,346	5,301,054	(42,864)	5,629,278	$ 60,352	3,210,765	2,357,968	193
Balance (in shares) at Mar. 31, 2022		344,850,272					6,035,205
Balance at Mar. 31, 2022	14,836,690	$ 1,789,092	8,102,618	5,229,069	(41,571)	5,477,953	$ 60,352	3,110,765	2,306,620	216
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	293,742			293,742		125,838			125,838
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(219,877)			(219,877)		(73,100)			(73,100)
Capital Contributions from Eversource Parent						100,000		100,000
Other Comprehensive (Loss)/Income, Net of Tax	$ (1,293)				(1,293)	(23)				(23)
Balance (in shares) at Jun. 30, 2022	346,411,029	346,411,029					6,035,205
Balance at Jun. 30, 2022	$ 15,057,215	$ 1,796,056	$ 8,242,346	$ 5,301,054	$ (42,864)	$ 5,629,278	$ 60,352	$ 3,210,765	$ 2,357,968	$ 193

THE CONNECTICUT LIGHT AND POW_6

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net Income	$ 739,068	$ 634,422
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	583,568	545,352
Deferred Income Taxes	126,970	120,390
Uncollectible Expense	30,032	27,683
Pension, SERP and PBOP (Income)/Expense, Net	(80,404)	(6,391)
Pension and PBOP Contributions	(52,400)	(72,400)
Regulatory (Under)/Over Recoveries, Net	(226,238)	18,252
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	(64,909)	28,583
Cost of Removal Expenditures	(169,863)	(95,593)
Other	(75,916)	(58,472)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(176,132)	(85,261)
Taxes Receivable/Accrued, Net	85,071	(9,113)
Accounts Payable	(83,550)	(285,670)
Other Current Assets and Liabilities, Net	(100,835)	(67,961)
Net Cash Flows Provided by Operating Activities	841,819	807,445
Investing Activities:
Investments in Property, Plant and Equipment	(1,549,081)	(1,423,223)
Other Investing Activities	10,771	12,661
Net Cash Flows Used in Investing Activities	(1,799,055)	(1,497,976)
Financing Activities:
Cash Dividends on Common Shares	(427,931)	(402,211)
Cash Dividends on Preferred Stock	(3,759)	(3,759)
Issuance of Long-Term Debt	3,350,000	1,525,000
Other Financing Activities	(42,133)	(35,008)
Net Cash Flows Provided by/(Used in) Financing Activities	892,904	793,592
Net (Decrease)/Increase in Cash and Restricted Cash	(64,332)	103,061
Cash and Restricted Cash - Beginning of Period	221,008	264,950
Cash and Restricted Cash - End of Period	156,676	368,011
The Connecticut Light and Power Company
Operating Activities:
Net Income	278,814	213,955
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	175,498	167,828
Deferred Income Taxes	15,782	41,886
Uncollectible Expense	6,701	6,614
Pension, SERP and PBOP (Income)/Expense, Net	(14,532)	3,803
Pension and PBOP Contributions	0	(37,880)
Regulatory (Under)/Over Recoveries, Net	(141,830)	(50,704)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	(64,909)	28,583
Amortization of Regulatory Assets/(Liabilities), Net	212,522	47,716
Cost of Removal Expenditures	(37,103)	(38,031)
Other	(23,311)	(24,106)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(170,500)	(104,262)
Taxes Receivable/Accrued, Net	18,735	33,049
Accounts Payable	(20,845)	(80,007)
Other Current Assets and Liabilities, Net	3,563	15,513
Net Cash Flows Provided by Operating Activities	238,585	223,957
Investing Activities:
Investments in Property, Plant and Equipment	(414,407)	(393,323)
Other Investing Activities	424	157
Net Cash Flows Used in Investing Activities	(413,983)	(393,166)
Financing Activities:
Cash Dividends on Common Shares	(146,200)	(140,200)
Cash Dividends on Preferred Stock	(2,779)	(2,779)
Capital Contributions from Eversource Parent	200,000	0
Issuance of Long-Term Debt	0	425,000
(Decrease)/Increase in Notes Payable to Eversource Parent	67,500	0
Other Financing Activities	0	(5,180)
Net Cash Flows Provided by/(Used in) Financing Activities	118,521	276,841
Net (Decrease)/Increase in Cash and Restricted Cash	(56,877)	107,632
Cash and Restricted Cash - Beginning of Period	74,788	99,809
Cash and Restricted Cash - End of Period	$ 17,911	$ 207,441

NSTAR ELECTRIC COMPANY AND SUBS

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 29,540	$ 66,773
Receivables, Net (net of allowance for uncollectible accounts)	1,345,904	1,226,069
Unbilled Revenues	177,472	210,879
Fuel, Materials, Supplies and REC Inventory	262,421	267,547
Regulatory Assets	1,163,411	1,129,093
Prepayments and Other Current Assets	289,295	369,759
Total Current Assets	3,268,043	3,270,120
Property, Plant and Equipment, Net	34,407,210	33,377,650
Deferred Debits and Other Assets:
Total Long-Term Regulatory Assets	4,569,236	4,586,709
Prepaid Pension and PBOP	446,780	271,987
Other Long-Term Assets	626,821	611,769
Total Deferred Debits and Other Assets	12,240,987	11,844,374
Total Assets	49,916,240	48,492,144
Current Liabilities:
Notes Payable	98,800	1,505,450
Long-Term Debt – Current Portion	1,265,463	1,193,097
Accounts Payable	1,353,506	1,672,230
Regulatory Liabilities	759,733	602,432
Other Current Liabilities	739,833	830,620
Total Current Liabilities	4,260,545	5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	4,770,063	4,597,120
Regulatory Liabilities	3,886,914	3,866,251
Other Long-Term Liabilities	881,729	971,080
Total Deferred Credits and Other Liabilities	10,427,043	10,412,412
Long-Term Debt	19,583,770	17,023,577
Preferred Stock Not Subject to Mandatory Redemption	155,570	155,570
Common Shareholders' Equity:
Common Shares	1,796,056	1,789,092
Capital Surplus, Paid In	8,242,346	8,098,514
Retained Earnings	5,301,054	5,005,391
Accumulated Other Comprehensive Income	(42,864)	(42,275)
Common Shareholders' Equity	15,057,215	14,599,844
Commitments and Contingencies (Note 9)
Total Liabilities and Capitalization	49,916,240	48,492,144
NSTAR Electric Company
Current Assets:
Cash	5,349	745
Receivables, Net (net of allowance for uncollectible accounts)	397,799	405,674
Accounts Receivable from Affiliated Companies	27,235	67,420
Unbilled Revenues	47,088	37,497
Fuel, Materials, Supplies and REC Inventory	71,229	116,712
Taxes Receivable	22,329	80,617
Regulatory Assets	419,718	443,956
Prepayments and Other Current Assets	28,303	22,397
Total Current Assets	1,019,050	1,175,018
Property, Plant and Equipment, Net	11,149,405	10,876,614
Deferred Debits and Other Assets:
Total Long-Term Regulatory Assets	1,260,785	1,135,231
Prepaid Pension and PBOP	484,746	441,426
Other Long-Term Assets	179,517	171,657
Total Deferred Debits and Other Assets	1,925,048	1,748,314
Total Assets	14,093,503	13,799,946
Current Liabilities:
Notes Payable	63,000	162,500
Notes Payable to Eversource Parent	3,200	0
Long-Term Debt – Current Portion	400,000	400,000
Accounts Payable	353,625	490,915
Accounts Payable to Affiliated Companies	100,487	129,575
Obligations to Third Party Suppliers	125,800	116,273
Renewable Portfolio Standards Compliance Obligations	59,387	100,200
Regulatory Liabilities	274,139	228,248
Other Current Liabilities	57,366	84,303
Total Current Liabilities	1,437,004	1,712,014
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,645,526	1,579,508
Regulatory Liabilities	1,571,705	1,559,072
Other Long-Term Liabilities	276,267	347,934
Total Deferred Credits and Other Liabilities	3,493,498	3,486,514
Long-Term Debt	4,029,660	3,585,399
Preferred Stock Not Subject to Mandatory Redemption	43,000	43,000
Common Shareholders' Equity:
Common Shares	0	0
Capital Surplus, Paid In	2,303,942	2,253,942
Retained Earnings	2,785,972	2,718,576
Accumulated Other Comprehensive Income	427	501
Common Shareholders' Equity	5,090,341	4,973,019
Commitments and Contingencies (Note 9)
Total Liabilities and Capitalization	$ 14,093,503	$ 13,799,946

NSTAR ELECTRIC COMPANY AND SU_2

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Allowance for uncollectible accounts	$ 457,846	$ 417,406
NSTAR Electric
Allowance for uncollectible accounts	$ 100,534	$ 97,005

NSTAR ELECTRIC COMPANY AND SU_3

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues	$ 2,572,641	$ 2,122,538	$ 6,043,951	$ 4,948,378
Operating Expenses:
Purchased Power, Fuel and Transmission	940,541	650,087	2,330,237	1,648,578
Operations and Maintenance	452,174	411,147	924,608	876,689
Depreciation	294,238	274,647	583,568	545,352
Energy Efficiency Programs	136,679	128,955	336,163	317,018
Taxes Other Than Income Taxes	223,031	200,486	443,395	409,944
Total Operating Expenses	2,117,072	1,670,933	4,925,328	3,911,205
Operating Income	455,569	451,605	1,118,623	1,037,173
Interest Expense	160,090	145,435	313,334	283,201
Other Income, Net	93,861	46,619	165,422	80,820
Income Before Income Tax Expense	389,340	352,789	970,711	834,792
Income Tax Expense	95,598	86,389	231,643	200,370
Net Income	293,742	266,400	739,068	634,422
NSTAR Electric Company
Operating Revenues	783,650	687,375	1,646,825	1,424,418
Operating Expenses:
Purchased Power, Fuel and Transmission	236,789	191,137	550,537	417,615
Operations and Maintenance	149,094	136,356	313,956	279,576
Depreciation	89,701	83,917	178,734	166,710
Amortization of Regulatory Assets/(Liabilities), Net	20,022	(2,528)	49,367	15,890
Energy Efficiency Programs	69,290	64,273	149,522	139,373
Taxes Other Than Income Taxes	60,891	54,126	120,664	108,776
Total Operating Expenses	625,787	527,281	1,362,780	1,127,940
Operating Income	157,863	160,094	284,045	296,478
Interest Expense	38,984	37,195	77,206	69,501
Other Income, Net	34,259	21,915	63,490	38,727
Income Before Income Tax Expense	153,138	144,814	270,329	265,704
Income Tax Expense	33,701	33,902	58,152	60,868
Net Income	$ 119,437	$ 110,912	$ 212,177	$ 204,836

NSTAR ELECTRIC COMPANY AND SU_4

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income	$ 293,742	$ 266,400	$ 739,068	$ 634,422
Other Comprehensive Income (Loss), Net of Tax:
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	(793)	163	724	1,680
Qualified Cash Flow Hedging Instruments	5	445	10	852
Changes in Unrealized (Losses)/Gains on Marketable Securities	(505)	273	(1,323)	(463)
Net OCI	(1,293)	881	(589)	2,069
Comprehensive Income Attributable to Common Shareholders	290,569	265,401	734,720	632,732
NSTAR Electric Company
Net Income	119,437	110,912	212,177	204,836
Other Comprehensive Income (Loss), Net of Tax:
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	(27)	(40)	(72)	(81)
Qualified Cash Flow Hedging Instruments	5	179	10	288
Changes in Unrealized (Losses)/Gains on Marketable Securities	(5)	2	(12)	(5)
Net OCI	(27)	141	(74)	202
Comprehensive Income Attributable to Common Shareholders	$ 119,410	$ 111,053	$ 212,103	$ 205,038

NSTAR ELECTRIC COMPANY AND SU_5

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus, Paid In	Retained Earnings	Accumulated Other Comprehensive Loss	NSTAR Electric	NSTAR Electric Common Stock	NSTAR Electric Capital Surplus, Paid In	NSTAR Electric Retained Earnings	NSTAR Electric Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2020		342,954,023					200
Balance at Dec. 31, 2020	$ 14,063,566	$ 1,789,092	$ 8,015,663	$ 4,613,201	$ (76,411)	$ 4,521,418	$ 0	$ 1,993,942	$ 2,527,167	$ 309
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	368,023			368,023		93,924			93,924
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(206,913)			(206,913)		(206,400)			(206,400)
Other Comprehensive (Loss)/Income, Net of Tax	1,188				1,188	61				61
Balance (in shares) at Mar. 31, 2021		343,434,298					200
Balance at Mar. 31, 2021	14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	4,408,513	$ 0	1,993,942	2,414,201	370
Balance (in shares) at Dec. 31, 2020		342,954,023					200
Balance at Dec. 31, 2020	14,063,566	$ 1,789,092	8,015,663	4,613,201	(76,411)	4,521,418	$ 0	1,993,942	2,527,167	309
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	634,422					204,836
Dividends on Preferred Stock	(3,800)
Other Comprehensive (Loss)/Income, Net of Tax	2,069					202
Balance (in shares) at Jun. 30, 2021		343,601,103					200
Balance at Jun. 30, 2021	14,311,889	$ 1,789,092	8,032,959	4,830,058	(74,342)	4,502,276	$ 0	2,053,942	2,447,823	511
Balance (in shares) at Mar. 31, 2021		343,434,298					200
Balance at Mar. 31, 2021	14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	4,408,513	$ 0	1,993,942	2,414,201	370
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	266,400			266,400		110,912			110,912
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(206,893)			(206,893)		(76,800)			(76,800)
Capital Contributions from Eversource Parent						60,000		60,000
Other Comprehensive (Loss)/Income, Net of Tax	881				881	141				141
Balance (in shares) at Jun. 30, 2021		343,601,103					200
Balance at Jun. 30, 2021	$ 14,311,889	$ 1,789,092	8,032,959	4,830,058	(74,342)	4,502,276	$ 0	2,053,942	2,447,823	511
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196					200
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	4,973,019	$ 0	2,253,942	2,718,576	501
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	445,326			445,326		92,739			92,739
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(219,768)			(219,768)		(71,900)			(71,900)
Other Comprehensive (Loss)/Income, Net of Tax	704				704	(47)				(47)
Balance (in shares) at Mar. 31, 2022		344,850,272					200
Balance at Mar. 31, 2022	$ 14,836,690	$ 1,789,092	8,102,618	5,229,069	(41,571)	4,993,321	$ 0	2,253,942	2,738,925	454
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196					200
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	4,973,019	$ 0	2,253,942	2,718,576	501
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	739,068					212,177
Dividends on Preferred Stock	(3,800)
Other Comprehensive (Loss)/Income, Net of Tax	$ (589)					(74)
Balance (in shares) at Jun. 30, 2022	346,411,029	346,411,029					200
Balance at Jun. 30, 2022	$ 15,057,215	$ 1,796,056	8,242,346	5,301,054	(42,864)	5,090,341	$ 0	2,303,942	2,785,972	427
Balance (in shares) at Mar. 31, 2022		344,850,272					200
Balance at Mar. 31, 2022	14,836,690	$ 1,789,092	8,102,618	5,229,069	(41,571)	4,993,321	$ 0	2,253,942	2,738,925	454
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	293,742			293,742		119,437			119,437
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(219,877)			(219,877)		(71,900)			(71,900)
Capital Contributions from Eversource Parent						50,000		50,000
Other Comprehensive (Loss)/Income, Net of Tax	$ (1,293)				(1,293)	(27)				(27)
Balance (in shares) at Jun. 30, 2022	346,411,029	346,411,029					200
Balance at Jun. 30, 2022	$ 15,057,215	$ 1,796,056	$ 8,242,346	$ 5,301,054	$ (42,864)	$ 5,090,341	$ 0	$ 2,303,942	$ 2,785,972	$ 427

NSTAR ELECTRIC COMPANY AND SU_6

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net Income	$ 739,068	$ 634,422
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	583,568	545,352
Deferred Income Taxes	126,970	120,390
Uncollectible Expense	30,032	27,683
Pension and PBOP Contributions	(52,400)	(72,400)
Regulatory (Under)/Over Recoveries, Net	(226,238)	18,252
Cost of Removal Expenditures	(169,863)	(95,593)
Other	(75,916)	(58,472)
Changes in Current Assets and Liabilities:
Accounts Receivables from Subsidiaries	(176,132)	(85,261)
Taxes Receivable/Accrued, Net	85,071	(9,113)
Accounts Payable	(83,550)	(285,670)
Other Current Assets and Liabilities, Net	(100,835)	(67,961)
Net Cash Flows Provided by Operating Activities	841,819	807,445
Investing Activities:
Investments in Property, Plant and Equipment	(1,549,081)	(1,423,223)
Other Investing Activities	10,771	12,661
Net Cash Flows Used in Investing Activities	(1,799,055)	(1,497,976)
Financing Activities:
Cash Dividends on Common Shares	(427,931)	(402,211)
Cash Dividends on Preferred Stock	(3,759)	(3,759)
Issuance of Long-Term Debt	3,350,000	1,525,000
Retirement of Long-Term Debt	(770,000)	(1,022,000)
(Decrease)/Increase in Notes Payable	(1,317,950)	753,175
Other Financing Activities	(42,133)	(35,008)
Net Cash Flows Provided by/(Used in) Financing Activities	892,904	793,592
Net (Decrease)/Increase in Cash and Restricted Cash	(64,332)	103,061
Cash and Restricted Cash - Beginning of Period	221,008	264,950
Cash and Restricted Cash - End of Period	156,676	368,011
NSTAR Electric
Operating Activities:
Net Income	212,177	204,836
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	178,734	166,710
Deferred Income Taxes	42,476	28,742
Uncollectible Expense	8,688	7,394
Pension, SERP and PBOP Expense, Net of Contributions	(27,750)	(12,990)
Pension and PBOP Contributions	(10,000)	(10,000)
Regulatory (Under)/Over Recoveries, Net	(106,074)	(12,562)
Amortization of Regulatory Assets/(Liabilities), Net	49,367	15,890
Cost of Removal Expenditures	(26,337)	(26,968)
Payment of Withheld Property Taxes	(76,084)	0
Other	(24,635)	(13,347)
Changes in Current Assets and Liabilities:
Accounts Receivables from Subsidiaries	35,107	(49,324)
Taxes Receivable/Accrued, Net	58,289	57,584
Accounts Payable	(98,187)	(88,729)
Other Current Assets and Liabilities, Net	(18,644)	(21,349)
Net Cash Flows Provided by Operating Activities	197,127	245,887
Investing Activities:
Investments in Property, Plant and Equipment	(443,978)	(426,053)
Other Investing Activities	118	43
Net Cash Flows Used in Investing Activities	(443,860)	(426,010)
Financing Activities:
Cash Dividends on Common Shares	(143,800)	(283,200)
Cash Dividends on Preferred Stock	(980)	(980)
Issuance of Long-Term Debt	450,000	300,000
Retirement of Long-Term Debt	0	(250,000)
Capital Contributions from Eversource Parent	50,000	60,000
Increase in Notes Payable to Eversource Parent	3,200	200
(Decrease)/Increase in Notes Payable	(99,500)	360,500
Other Financing Activities	(7,642)	(5,909)
Net Cash Flows Provided by/(Used in) Financing Activities	251,278	180,611
Net (Decrease)/Increase in Cash and Restricted Cash	4,545	488
Cash and Restricted Cash - Beginning of Period	18,179	17,410
Cash and Restricted Cash - End of Period	$ 22,724	$ 17,898

PUBLIC SERVICE COMPANY OF NEW H

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 29,540	$ 66,773
Receivables, Net (net of allowance for uncollectible accounts)	1,345,904	1,226,069
Unbilled Revenues	177,472	210,879
Fuel, Materials, Supplies and REC Inventory	262,421	267,547
Regulatory Assets	1,163,411	1,129,093
Prepayments and Other Current Assets	289,295	369,759
Total Current Assets	3,268,043	3,270,120
Property, Plant and Equipment, Net	34,407,210	33,377,650
Deferred Debits and Other Assets:
Total Long-Term Regulatory Assets	4,569,236	4,586,709
Other Long-Term Assets	626,821	611,769
Total Deferred Debits and Other Assets	12,240,987	11,844,374
Total Assets	49,916,240	48,492,144
Current Liabilities:
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	1,353,506	1,672,230
Regulatory Liabilities	759,733	602,432
Other Current Liabilities	739,833	830,620
Total Current Liabilities	4,260,545	5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	4,770,063	4,597,120
Regulatory Liabilities	3,886,914	3,866,251
Other Long-Term Liabilities	881,729	971,080
Total Deferred Credits and Other Liabilities	10,427,043	10,412,412
Long-Term Debt	19,583,770	17,023,577
Rate Reduction Bonds	432,097	453,702
Common Shareholders' Equity:
Common Shares	1,796,056	1,789,092
Capital Surplus, Paid In	8,242,346	8,098,514
Retained Earnings	5,301,054	5,005,391
Accumulated Other Comprehensive (Loss)/Income	(42,864)	(42,275)
Common Shareholders' Equity	15,057,215	14,599,844
Commitments and Contingencies (Note 9)
Total Liabilities and Capitalization	49,916,240	48,492,144
PSNH
Current Assets:
Cash	133	15
Receivables, Net (net of allowance for uncollectible accounts)	151,444	124,232
Accounts Receivable from Affiliated Companies	7,792	17,156
Unbilled Revenues	48,161	53,937
Fuel, Materials, Supplies and REC Inventory	40,810	25,930
Regulatory Assets	93,225	107,169
Special Deposits	30,935	31,390
Prepayments and Other Current Assets	24,592	22,109
Total Current Assets	397,092	381,938
Property, Plant and Equipment, Net	3,820,237	3,656,462
Deferred Debits and Other Assets:
Total Long-Term Regulatory Assets	643,745	679,182
Other Long-Term Assets	19,797	23,202
Total Deferred Debits and Other Assets	663,542	702,384
Total Assets	4,880,871	4,740,784
Current Liabilities:
Notes Payable to Eversource Parent	89,300	110,600
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	179,824	166,452
Accounts Payable to Affiliated Companies	26,994	43,485
Regulatory Liabilities	106,554	120,176
Other Current Liabilities	54,772	63,005
Total Current Liabilities	500,654	546,928
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	543,771	537,978
Regulatory Liabilities	393,673	381,366
Other Long-Term Liabilities	43,188	64,264
Total Deferred Credits and Other Liabilities	980,632	983,608
Long-Term Debt	1,164,229	1,163,833
Rate Reduction Bonds	432,097	453,702
Common Shareholders' Equity:
Common Shares	0	0
Capital Surplus, Paid In	1,268,134	1,088,134
Retained Earnings	535,180	504,556
Accumulated Other Comprehensive (Loss)/Income	(55)	23
Common Shareholders' Equity	1,803,259	1,592,713
Commitments and Contingencies (Note 9)
Total Liabilities and Capitalization	$ 4,880,871	$ 4,740,784

PUBLIC SERVICE COMPANY OF NEW_2

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Allowance for uncollectible accounts	$ 457,846	$ 417,406
PSNH
Allowance for uncollectible accounts	$ 27,314	$ 24,331

PUBLIC SERVICE COMPANY OF NEW_3

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating Revenues	$ 2,572,641	$ 2,122,538	$ 6,043,951	$ 4,948,378
Operating Expenses:
Purchased Power, Fuel and Transmission	940,541	650,087	2,330,237	1,648,578
Operations and Maintenance	452,174	411,147	924,608	876,689
Depreciation	294,238	274,647	583,568	545,352
Energy Efficiency Programs	136,679	128,955	336,163	317,018
Taxes Other Than Income Taxes	223,031	200,486	443,395	409,944
Total Operating Expenses	2,117,072	1,670,933	4,925,328	3,911,205
Operating Income	455,569	451,605	1,118,623	1,037,173
Interest Expense	160,090	145,435	313,334	283,201
Other Income, Net	93,861	46,619	165,422	80,820
Income Before Income Tax Expense	389,340	352,789	970,711	834,792
Income Tax Expense	95,598	86,389	231,643	200,370
Net Income	293,742	266,400	739,068	634,422
PSNH
Operating Revenues	307,055	278,849	646,482	572,284
Operating Expenses:
Purchased Power, Fuel and Transmission	110,803	80,513	236,647	172,122
Operations and Maintenance	66,730	56,537	126,303	111,201
Depreciation	31,557	29,825	62,810	59,293
Amortization of Regulatory Assets/(Liabilities), Net	9,218	26,274	36,052	44,821
Energy Efficiency Programs	8,817	9,365	17,535	19,713
Taxes Other Than Income Taxes	25,261	23,453	48,046	45,603
Total Operating Expenses	252,386	225,967	527,393	452,753
Operating Income	54,669	52,882	119,089	119,531
Interest Expense	14,757	13,821	28,402	28,452
Other Income, Net	7,782	4,260	15,292	8,427
Income Before Income Tax Expense	47,694	43,321	105,979	99,506
Income Tax Expense	10,656	8,688	23,355	20,197
Net Income	$ 37,038	$ 34,633	$ 82,624	$ 79,309

PUBLIC SERVICE COMPANY OF NEW_4

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net Income	$ 293,742	$ 266,400	$ 739,068	$ 634,422
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	5	445	10	852
Changes in Unrealized (Losses)/Gains on Marketable Securities	(505)	273	(1,323)	(463)
Net OCI	(1,293)	881	(589)	2,069
Comprehensive Income Attributable to Common Shareholders	290,569	265,401	734,720	632,732
PSNH
Net Income	37,038	34,633	82,624	79,309
Other Comprehensive Income (Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	0	266	0	564
Changes in Unrealized (Losses)/Gains on Marketable Securities	(30)	16	(78)	(27)
Net OCI	(30)	282	(78)	537
Comprehensive Income Attributable to Common Shareholders	$ 37,008	$ 34,915	$ 82,546	$ 79,846

PUBLIC SERVICE COMPANY OF NEW_5

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Common Stock	Capital Surplus, Paid In	Retained Earnings	Accumulated Other Comprehensive Loss	PSNH	PSNH Common Stock	PSNH Capital Surplus, Paid In	PSNH Retained Earnings	PSNH Accumulated Other Comprehensive Loss
Balance (in shares) at Dec. 31, 2020		342,954,023					301
Balance at Dec. 31, 2020	$ 14,063,566	$ 1,789,092	$ 8,015,663	$ 4,613,201	$ (76,411)	$ 1,542,539	$ 0	$ 928,134	$ 615,018	$ (613)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	368,023			368,023		44,676			44,676
Dividends on Common Stock	(206,913)			(206,913)		(25,200)			(25,200)
Other Comprehensive (Loss)/Income, Net of Tax	1,188				1,188	255				255
Balance (in shares) at Mar. 31, 2021		343,434,298					301
Balance at Mar. 31, 2021	14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	1,562,270	$ 0	928,134	634,494	(358)
Balance (in shares) at Dec. 31, 2020		342,954,023					301
Balance at Dec. 31, 2020	14,063,566	$ 1,789,092	8,015,663	4,613,201	(76,411)	1,542,539	$ 0	928,134	615,018	(613)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	634,422					79,309
Other Comprehensive (Loss)/Income, Net of Tax	2,069					537
Balance (in shares) at Jun. 30, 2021		343,601,103					301
Balance at Jun. 30, 2021	14,311,889	$ 1,789,092	8,032,959	4,830,058	(74,342)	1,571,985	$ 0	1,088,134	483,927	(76)
Balance (in shares) at Mar. 31, 2021		343,434,298					301
Balance at Mar. 31, 2021	14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	1,562,270	$ 0	928,134	634,494	(358)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	266,400			266,400		34,633			34,633
Dividends on Common Stock	(206,893)			(206,893)		(185,200)			(185,200)
Capital Contributions from Eversource Parent						160,000		160,000
Other Comprehensive (Loss)/Income, Net of Tax	881				881	282				282
Balance (in shares) at Jun. 30, 2021		343,601,103					301
Balance at Jun. 30, 2021	$ 14,311,889	$ 1,789,092	8,032,959	4,830,058	(74,342)	1,571,985	$ 0	1,088,134	483,927	(76)
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196					301
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	1,592,713	$ 0	1,088,134	504,556	23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	445,326			445,326		45,586			45,586
Dividends on Common Stock	(219,768)			(219,768)		(26,000)			(26,000)
Other Comprehensive (Loss)/Income, Net of Tax	704				704	(48)				(48)
Balance (in shares) at Mar. 31, 2022		344,850,272					301
Balance at Mar. 31, 2022	$ 14,836,690	$ 1,789,092	8,102,618	5,229,069	(41,571)	1,612,251	$ 0	1,088,134	524,142	(25)
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196					301
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	1,592,713	$ 0	1,088,134	504,556	23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	739,068					82,624
Other Comprehensive (Loss)/Income, Net of Tax	$ (589)					(78)
Balance (in shares) at Jun. 30, 2022	346,411,029	346,411,029					301
Balance at Jun. 30, 2022	$ 15,057,215	$ 1,796,056	8,242,346	5,301,054	(42,864)	1,803,259	$ 0	1,268,134	535,180	(55)
Balance (in shares) at Mar. 31, 2022		344,850,272					301
Balance at Mar. 31, 2022	14,836,690	$ 1,789,092	8,102,618	5,229,069	(41,571)	1,612,251	$ 0	1,088,134	524,142	(25)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	293,742			293,742		37,038			37,038
Dividends on Common Stock	(219,877)			(219,877)		(26,000)			(26,000)
Capital Contributions from Eversource Parent						180,000		180,000
Other Comprehensive (Loss)/Income, Net of Tax	$ (1,293)				(1,293)	(30)				(30)
Balance (in shares) at Jun. 30, 2022	346,411,029	346,411,029					301
Balance at Jun. 30, 2022	$ 15,057,215	$ 1,796,056	$ 8,242,346	$ 5,301,054	$ (42,864)	$ 1,803,259	$ 0	$ 1,268,134	$ 535,180	$ (55)

PUBLIC SERVICE COMPANY OF NEW_6

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities:
Net Income	$ 739,068	$ 634,422
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	583,568	545,352
Deferred Income Taxes	126,970	120,390
Uncollectible Expense	30,032	27,683
Pension, SERP and PBOP Income, Net	(80,404)	(6,391)
Regulatory Over/(Underrecoveries), Net	(226,238)	18,252
Cost of Removal Expenditures	(169,863)	(95,593)
Other	(75,916)	(58,472)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(176,132)	(85,261)
Taxes Receivable/Accrued, Net	85,071	(9,113)
Accounts Payable	(83,550)	(285,670)
Other Current Assets and Liabilities, Net	(100,835)	(67,961)
Net Cash Flows Provided by Operating Activities	841,819	807,445
Investing Activities:
Investments in Property, Plant and Equipment	(1,549,081)	(1,423,223)
Other Investing Activities	10,771	12,661
Net Cash Flows Used in Investing Activities	(1,799,055)	(1,497,976)
Financing Activities:
Cash Dividends on Common Shares	(427,931)	(402,211)
Issuance of Long-Term Debt	3,350,000	1,525,000
Retirement of Long-Term Debt	(770,000)	(1,022,000)
Repayment of Rate Reduction Bonds	(21,605)	(21,605)
Other Financing Activities	(42,133)	(35,008)
Net Cash Flows Provided by/(Used in) Financing Activities	892,904	793,592
Net (Decrease)/Increase in Cash and Restricted Cash	(64,332)	103,061
Cash and Restricted Cash - Beginning of Period	221,008	264,950
Cash and Restricted Cash - End of Period	156,676	368,011
PSNH
Operating Activities:
Net Income	82,624	79,309
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	62,810	59,293
Deferred Income Taxes	3,137	(842)
Uncollectible Expense	4,544	3,226
Pension, SERP and PBOP Income, Net	(8,118)	(1,868)
Regulatory Over/(Underrecoveries), Net	(1,744)	(6,965)
Amortization of Regulatory Assets/(Liabilities), Net	36,052	44,821
Cost of Removal Expenditures	(16,560)	(13,164)
Other	4,436	587
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(17,306)	(3,717)
Taxes Receivable/Accrued, Net	10,138	9,183
Accounts Payable	15,920	(29,320)
Other Current Assets and Liabilities, Net	(35,559)	(2,240)
Net Cash Flows Provided by Operating Activities	140,374	138,303
Investing Activities:
Investments in Property, Plant and Equipment	(226,975)	(134,256)
Other Investing Activities	726	270
Net Cash Flows Used in Investing Activities	(226,249)	(133,986)
Financing Activities:
Cash Dividends on Common Shares	(52,000)	(210,400)
Capital Contributions from Eversource Parent	180,000	160,000
Issuance of Long-Term Debt	0	350,000
Retirement of Long-Term Debt	0	(282,000)
Repayment of Rate Reduction Bonds	(21,605)	(21,605)
(Decrease)/Increase in Notes Payable to Eversource Parent	(21,300)	2,300
Other Financing Activities	(47)	(2,941)
Net Cash Flows Provided by/(Used in) Financing Activities	85,048	(4,646)
Net (Decrease)/Increase in Cash and Restricted Cash	(827)	(329)
Cash and Restricted Cash - Beginning of Period	35,126	39,555
Cash and Restricted Cash - End of Period	$ 34,299	$ 39,226

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES A. Basis of Presentation Eversource Energy is a public utility holding company primarily engaged, through its wholly-owned regulated utility subsidiaries, in the energy delivery business. Eversource Energy's wholly-owned regulated utility subsidiaries consist of CL&P, NSTAR Electric and PSNH (electric utilities), Yankee Gas, NSTAR Gas and Eversource Gas Company of Massachusetts (EGMA) (natural gas utilities), and Aquarion (water utilities). Eversource provides energy delivery and/or water service to approximately 4.4 million electric, natural gas and water customers through ten regulated utilities in Connecticut, Massachusetts and New Hampshire. The unaudited condensed consolidated financial statements of Eversource, NSTAR Electric and PSNH include the accounts of each of their respective subsidiaries. Intercompany transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements of Eversource, NSTAR Electric and PSNH and the unaudited condensed financial statements of CL&P are herein collectively referred to as the "financial statements." The combined notes to the financial statements have been prepared pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures included in annual financial statements prepared in accordance with GAAP have been omitted pursuant to such rules and regulations. The accompanying financial statements should be read in conjunction with the Combined Notes to Financial Statements included in Item 8, "Financial Statements and Supplementary Data," of the Eversource 2021 Form 10-K, which was filed with the SEC on February 17, 2022. The preparation of the financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The financial statements contain, in the opinion of management, all adjustments (including normal, recurring adjustments) necessary to present fairly Eversource's, CL&P's, NSTAR Electric's and PSNH's financial position as of June 30, 2022 and December 31, 2021, and the results of operations, comprehensive income and common shareholders' equity for the three and six months ended June 30, 2022 and 2021 and the cash flows for the six months ended June 30, 2022 and 2021. The results of operations and comprehensive income for the three and six months ended June 30, 2022 and 2021 and the cash flows for the six months ended June 30, 2022 and 2021 are not necessarily indicative of the results expected for a full year. CYAPC and YAEC are inactive regional nuclear power companies engaged in the long-term storage of their spent nuclear fuel. Eversource consolidates the operations of CYAPC and YAEC because CL&P's, NSTAR Electric's and PSNH's combined ownership and voting interests in each of these entities is greater than 50 percent. Intercompany transactions between CL&P, NSTAR Electric, PSNH and the CYAPC and YAEC companies have been eliminated in consolidation of the Eversource financial statements. Eversource holds several equity ownership interests that are not consolidated and are accounted for under the equity method. Eversource's utility subsidiaries' electric, natural gas and water distribution and transmission businesses are subject to rate-regulation that is based on cost recovery and meets the criteria for application of accounting guidance for entities with rate-regulated operations, which considers the effect of regulation on the differences in the timing of the recognition of certain revenues and expenses from those of other businesses and industries. See Note 2, "Regulatory Accounting," for further information. Certain reclassifications of prior period data were made in the accompanying financial statements to conform to the current period presentation. B. Allowance for Uncollectible Accounts Receivables, Net on the balance sheets primarily includes trade receivables from retail customers and customers related to wholesale transmission contracts, wholesale market sales, sales of RECs, and property rentals. Receivables, Net also includes customer receivables for the purchase of electricity from a competitive third party supplier, the current portion of customer energy efficiency loans, property damage receivables and other miscellaneous receivables. There is no material concentration of receivables. Receivables are recorded at amortized cost, net of a credit loss provision (or allowance for uncollectible accounts). Receivables are presented net of expected credit losses at estimated net realizable value by maintaining an allowance for uncollectible accounts. The current expected credit loss (CECL) model is applied to receivables for purposes of calculating the allowance for uncollectible accounts. This model is based on expected losses and results in the recognition of estimated expected credit losses, including uncollectible amounts for both billed and unbilled revenues, over the life of the receivable at the time a receivable is recorded. The allowance for uncollectible accounts is determined based upon a variety of judgments and factors, including an aging-based quantitative assessment that applies an estimated uncollectible percentage to each receivable aging category. Factors in determining credit loss include historical collection, write-off experience, analysis of delinquency statistics, and management's assessment of collectability from customers, including current conditions, customer payment trends, the impact on customer bills because of energy usage trends and changes in rates, flexible payment plans and financial hardship arrearage management programs being offered to customers, reasonable forecasts, and expectations of future collectability and collection efforts. Management continuously assesses the collectability of receivables and adjusts estimates based on actual experience and future expectations based on economic conditions, collection efforts and other factors. Management also monitors the aging analysis of receivables to determine if there are changes in the collections of accounts receivable. Receivable balances are written off against the allowance for uncollectible accounts when the customer accounts are no longer in service and these balances are deemed to be uncollectible. Management concluded that the reserve balance as of June 30, 2022 adequately reflected the collection risk and net realizable value for its receivables. As of June 30, 2022 and December 31, 2021, the total amount incurred as a result of COVID-19 included in the allowance for uncollectible accounts was $63.1 million and $55.3 million at Eversource, $20.4 million and $23.9 million at CL&P, and $7.5 million and $9.0 million at NSTAR Electric, respectively. At our Connecticut and Massachusetts utilities, the COVID-19 related uncollectible amounts were deferred either as incremental regulatory costs or deferred through existing regulatory tracking mechanisms that recover uncollectible energy supply costs, as management believes it is probable that these costs will ultimately be recovered from customers in future rates. No COVID-19 related uncollectible amounts were deferred at PSNH as a result of a July 2021 NHPUC order. Based on the status of our COVID-19 regulatory dockets, policies and practices in the jurisdictions in which we operate, we believe the state regulatory commissions in Connecticut and Massachusetts will allow us to recover our incremental uncollectible customer receivable costs associated with COVID-19. The PURA allows CL&P and Yankee Gas to accelerate the recovery of accounts receivable balances attributable to qualified customers under financial or medical duress (uncollectible hardship accounts receivable) outstanding for greater than 180 days and 90 days, respectively. The DPU allows NSTAR Electric, NSTAR Gas and EGMA to recover in rates amounts associated with certain uncollectible hardship accounts receivable. These uncollectible hardship customer account balances are included in Regulatory Assets or Other Long-Term Assets on the balance sheets. Hardship customers are protected from shut-off in certain circumstances, and historical collection experience has reflected a higher default risk as compared to the rest of the receivable population. Management uses a higher credit risk profile for this pool of trade receivables as compared to non-hardship receivables. The allowance for uncollectible hardship accounts is included in the total uncollectible allowance balance. The total allowance for uncollectible accounts is included in Receivables, Net on the balance sheets. The activity in the allowance for uncollectible accounts by portfolio segment as of June 30 th is as follows: Eversource CL&P NSTAR Electric PSNH (Millions of Dollars) Hardship Accounts Retail (Non-Hardship), Total Allowance Hardship Accounts Retail (Non-Hardship), Total Allowance Hardship Accounts Retail (Non-Hardship), Total Allowance Total Allowance Three Months Ended 2022 Beginning Balance $ 225.5 $ 206.7 $ 432.2 $ 140.1 $ 40.4 $ 180.5 $ 39.7 $ 55.1 $ 94.8 $ 26.2 Uncollectible Expense — 12.9 12.9 — 2.9 2.9 — 4.0 4.0 2.0 Uncollectible Costs Deferred (1) 21.4 12.6 34.0 15.0 2.2 17.2 5.4 2.4 7.8 0.1 Write-Offs (4.6) (21.1) (25.7) (3.3) (6.2) (9.5) (0.1) (7.7) (7.8) (1.3) Recoveries Collected 0.4 4.0 4.4 0.3 1.3 1.6 — 1.7 1.7 0.3 Ending Balance $ 242.7 $ 215.1 $ 457.8 $ 152.1 $ 40.6 $ 192.7 $ 45.0 $ 55.5 $ 100.5 $ 27.3 Six Months Ended 2022 Beginning Balance $ 226.1 $ 191.3 $ 417.4 $ 144.6 $ 36.7 $ 181.3 $ 43.3 $ 53.7 $ 97.0 $ 24.3 Uncollectible Expense — 30.0 30.0 — 6.7 6.7 — 8.7 8.7 4.5 Uncollectible Costs Deferred (1) 22.4 27.3 49.7 11.0 — 11.0 2.1 7.8 9.9 1.1 Write-Offs (6.9) (43.1) (50.0) (4.4) (6.7) (11.1) (0.4) (18.3) (18.7) (3.1) Recoveries Collected 1.1 9.6 10.7 0.9 3.9 4.8 — 3.6 3.6 0.5 Ending Balance $ 242.7 $ 215.1 $ 457.8 $ 152.1 $ 40.6 $ 192.7 $ 45.0 $ 55.5 $ 100.5 $ 27.3 Eversource CL&P NSTAR Electric PSNH (Millions of Dollars) Hardship Accounts Retail (Non-Hardship), Total Allowance Hardship Accounts Retail (Non-Hardship), Total Allowance Hardship Accounts Retail (Non-Hardship), Total Allowance Total Allowance Three Months Ended 2021 Beginning Balance $ 197.3 $ 194.4 $ 391.7 $ 138.4 $ 36.7 $ 175.1 $ 31.1 $ 58.2 $ 89.3 $ 17.3 Uncollectible Expense — 11.4 11.4 — 2.8 2.8 — 3.5 3.5 2.0 Uncollectible Costs Deferred (1) 16.6 24.5 41.1 9.3 8.3 17.6 4.9 6.9 11.8 (0.3) Write-Offs (3.4) (18.1) (21.5) (2.3) (5.4) (7.7) (0.1) (7.7) (7.8) (2.0) Recoveries Collected 0.2 2.9 3.1 0.2 0.8 1.0 — 1.2 1.2 0.2 Ending Balance $ 210.7 $ 215.1 $ 425.8 $ 145.6 $ 43.2 $ 188.8 $ 35.9 $ 62.1 $ 98.0 $ 17.2 Six Months Ended 2021 Beginning Balance $ 194.8 $ 164.1 $ 358.9 $ 129.1 $ 28.3 $ 157.4 $ 39.7 $ 51.9 $ 91.6 $ 17.2 Uncollectible Expense — 27.7 27.7 — 6.6 6.6 — 7.4 7.4 3.2 Uncollectible Costs Deferred (1) 22.0 51.6 73.6 21.2 15.7 36.9 (3.5) 15.2 11.7 0.8 Write-Offs (6.7) (34.8) (41.5) (5.2) (9.3) (14.5) (0.3) (15.2) (15.5) (4.5) Recoveries Collected 0.6 6.5 7.1 0.5 1.9 2.4 — 2.8 2.8 0.5 Ending Balance $ 210.7 $ 215.1 $ 425.8 $ 145.6 $ 43.2 $ 188.8 $ 35.9 $ 62.1 $ 98.0 $ 17.2 (1) These expected credit losses are deferred as regulatory costs on the balance sheets, as these amounts are ultimately recovered in rates. Amounts include uncollectible costs for hardship accounts and other customer receivables, including uncollectible amounts related to uncollectible energy supply costs and COVID-19. C. Fair Value Measurements Fair value measurement guidance is applied to derivative contracts that are not elected or designated as "normal purchases" or "normal sales" (normal) and to the marketable securities held in trusts. Fair value measurement guidance is also applied to valuations of the investments used to calculate the funded status of pension and PBOP plans, the nonrecurring fair value measurements of nonfinancial assets such as goodwill, long-lived assets, equity method investments, AROs, and in the valuation of acquisitions. The fair value measurement guidance was also applied in estimating the fair value of preferred stock, long-term debt and RRBs. Fair Value Hierarchy: In measuring fair value, Eversource uses observable market data when available in order to minimize the use of unobservable inputs. Inputs used in fair value measurements are categorized into three fair value hierarchy levels for disclosure purposes. The entire fair value measurement is categorized based on the lowest level of input that is significant to the fair value measurement. Eversource evaluates the classification of assets and liabilities measured at fair value on a quarterly basis. The levels of the fair value hierarchy are described below: Level 1 - Inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 - Inputs are quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which all significant inputs are observable. Level 3 - Quoted market prices are not available. Fair value is derived from valuation techniques in which one or more significant inputs or assumptions are unobservable. Where possible, valuation techniques incorporate observable market inputs that can be validated to external sources such as industry exchanges, including prices of energy and energy-related products. Uncategorized - Investments that are measured at net asset value are not categorized within the fair value hierarchy. Determination of Fair Value: The valuation techniques and inputs used in Eversource's fair value measurements are described in Note 4, "Derivative Instruments," Note 5, "Marketable Securities," and Note 10, "Fair Value of Financial Instruments," to the financial statements. D. Other Income, Net The components of Other Income, Net on the statements of income were as follows: For the Three Months Ended June 30, 2022 June 30, 2021 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Pension, SERP and PBOP Non-Service $ 54.9 $ 16.2 $ 21.4 $ 6.7 $ 22.1 $ 4.3 $ 10.2 $ 2.7 AFUDC Equity 11.2 2.8 6.1 0.6 9.2 1.7 6.2 0.3 Equity in Earnings of Unconsolidated Affiliates (1) 16.6 — 0.1 — 4.7 — 0.1 — Investment Income/(Loss) 1.3 (0.7) 0.5 0.1 1.9 1.2 0.6 0.3 Interest Income 9.5 1.5 6.1 0.4 8.4 2.7 4.8 0.9 Other 0.4 — 0.1 — 0.3 — — 0.1 Total Other Income, Net $ 93.9 $ 19.8 $ 34.3 $ 7.8 $ 46.6 $ 9.9 $ 21.9 $ 4.3 For the Six Months Ended June 30, 2022 June 30, 2021 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Pension, SERP and PBOP Non-Service $ 109.2 $ 32.1 $ 42.4 $ 13.3 $ 42.2 $ 7.0 $ 20.2 $ 5.4 AFUDC Equity 21.1 5.6 11.0 1.0 18.4 3.4 12.4 0.9 Equity in Earnings of Unconsolidated Affiliates (1) 17.1 — 0.1 — 8.4 — 0.2 — Investment Income/(Loss) 1.1 (1.1) 0.2 0.3 1.3 1.5 0.8 0.4 Interest Income 16.1 2.8 9.6 0.7 9.9 2.8 4.9 1.6 Other 0.8 — 0.2 — 0.6 0.1 0.2 0.1 Total Other Income, Net $ 165.4 $ 39.4 $ 63.5 $ 15.3 $ 80.8 $ 14.8 $ 38.7 $ 8.4 (1) Equity in earnings of unconsolidated affiliates includes $12.2 million of pre-tax unrealized gains associated with an investment in a renewable energy fund for the three and six months ended June 30, 2022. For the three and six months ended June 30, 2021, equity in earnings of unconsolidated affiliates included $2.1 million of pre-tax unrealized gains associated with this investment. E. Investments in Unconsolidated Affiliates Investments in entities that are not consolidated are included in long-term assets on the balance sheets and earnings impacts from these equity investments are included in Other Income, Net on the statements of income. Eversource's investments included the following: (Millions of Dollars) Ownership Interest As of June 30, 2022 As of December 31, 2021 Offshore Wind Business - North East Offshore 50 % $ 1,487.1 $ 1,213.6 Natural Gas Pipeline - Algonquin Gas Transmission, LLC 15 % 119.3 121.9 Renewable Energy Investment Fund 90 % 88.4 76.5 Other various 25.1 24.3 Total Investments in Unconsolidated Affiliates $ 1,719.9 $ 1,436.3 Offshore Wind Business: Eversource’s offshore wind business includes a 50 percent ownership interest in North East Offshore, which holds PPAs and contracts for the Revolution Wind, South Fork Wind and Sunrise Wind projects, as well as an undeveloped offshore lease area. The offshore wind investment includes capital expenditures for the three offshore wind projects, as well as capitalized costs related to future development, acquisition costs of offshore lease areas, and capitalized interest. Cash flows used in investing activities presented in Investments in Unconsolidated Affiliates, Net on the statements of cash flows relates to capital contributions in the offshore wind investment. On May 4, 2022, Eversource announced that it had initiated a strategic review of its offshore wind investment portfolio. As part of that review, Eversource is exploring strategic alternatives that could result in a potential sale of all, or part, of its 50 percent interest in its offshore wind partnership with Ørsted. Eversource has advanced its strategic review process and is working with its advisors on the outreach strategy and marketing materials, which will aid the Company in evaluating the alternatives available for its wind investment. In late July, Eversource started preliminary and targeted outreach to potential buyers. Eversource expects to complete this review during 2022. Eversource’s strategic review of its offshore wind investment does not impact the June 30, 2022 financial statements. F. Other Taxes Eversource's companies that serve customers in Connecticut collect gross receipts taxes levied by the state of Connecticut from their customers. These gross receipts taxes are recorded separately with collections in Operating Revenues and with payments in Taxes Other Than Income Taxes on the statements of income as follows: For the Three Months Ended For the Six Months Ended (Millions of Dollars) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 Eversource $ 44.5 $ 39.9 $ 93.1 $ 88.5 CL&P 39.0 35.4 76.8 74.6 As agents for state and local governments, Eversource's companies that serve customers in Connecticut and Massachusetts collect certain sales taxes that are recorded on a net basis with no impact on the statements of income. G. Supplemental Cash Flow Information Non-cash investing activities include plant additions included in Accounts Payable as follows: (Millions of Dollars) As of June 30, 2022 As of June 30, 2021 Eversource $ 357.2 $ 344.8 CL&P 96.7 66.4 NSTAR Electric 75.1 103.8 PSNH 49.6 33.9 The following table reconciles cash as reported on the balance sheets to the cash and restricted cash balance as reported on the statements of cash flows: As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Cash as reported on the Balance Sheets $ 29.5 $ 9.2 $ 5.3 $ 0.1 $ 66.8 $ 55.8 $ 0.7 $ — Restricted cash included in: Special Deposits 90.8 8.7 17.4 30.9 78.2 18.7 17.4 31.4 Marketable Securities 17.2 — — 0.1 31.3 0.3 0.1 0.5 Other Long-Term Assets 19.2 — — 3.2 44.7 — — 3.2 Cash and Restricted Cash as reported on the Statements of Cash Flows $ 156.7 $ 17.9 $ 22.7 $ 34.3 $ 221.0 $ 74.8 $ 18.2 $ 35.1 Special Deposits represent cash collections related to the PSNH RRB customer charges that are held in trust, required ISO-NE cash deposits, and CYAPC and YAEC cash balances. The December 31, 2021 balance also included a $10 million customer assistance fund to provide bill payment assistance to certain existing non-hardship and hardship customers carrying arrearages at CL&P established under the terms of the PURA-approved October 2021 settlement agreement. Those customers were provided with $10 million of bill forgiveness in the first quarter of 2022, which represented a non-cash transaction. Special Deposits are included in Current Assets on the balance sheets. Restricted cash included in Marketable Securities represents money market funds held in trusts to fund certain non-qualified executive benefits and restricted trusts to fund CYAPC and YAEC's spent nuclear fuel storage obligations. Restricted cash also includes an Energy Relief Fund for energy efficiency and clean energy measures in the Merrimack Valley and an additional energy efficiency program established under the terms of the EGMA 2020 settlement agreement. As of June 30, 2022, $20.0 million of this restricted cash was recorded as short-term in Special Deposits and $15.9 million was recorded in Other Long-Term Assets. As of December 31, 2021, this restricted cash totaled $41.5 million and was recorded in Other Long-Term Assets on the balance sheet.

REGULATORY ACCOUNTING

REGULATORY ACCOUNTING	6 Months Ended
	Jun. 30, 2022
Regulated Operations [Abstract]
REGULATORY ACCOUNTING	REGULATORY ACCOUNTING Eversource's utility companies are subject to rate regulation that is based on cost recovery and meets the criteria for application of accounting guidance for rate-regulated operations, which considers the effect of regulation on the timing of the recognition of certain revenues and expenses. The regulated companies' financial statements reflect the effects of the rate-making process. The rates charged to the customers of Eversource's regulated companies are designed to collect each company's costs to provide service, plus a return on investment. The application of accounting guidance for rate-regulated enterprises results in recording regulatory assets and liabilities. Regulatory assets represent the deferral of incurred costs that are probable of future recovery in customer rates. Regulatory assets are amortized as the incurred costs are recovered through customer rates. Regulatory liabilities represent either revenues received from customers to fund expected costs that have not yet been incurred or probable future refunds to customers. Management believes it is probable that each of the regulated companies will recover its respective investments in long-lived assets and the regulatory assets that have been recorded. If management were to determine that it could no longer apply the accounting guidance applicable to rate-regulated enterprises, or if management could not conclude it is probable that costs would be recovered from customers in future rates, the applicable costs would be charged to net income in the period in which the determination is made. Regulatory Assets: The components of regulatory assets were as follows: As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Benefit Costs $ 1,435.0 $ 267.6 $ 397.2 $ 116.7 $ 1,481.0 $ 272.4 $ 395.5 $ 118.9 Storm Costs, Net 1,250.1 733.8 455.0 61.3 1,102.7 695.6 341.3 65.8 Regulatory Tracking Mechanisms 979.0 306.1 368.7 68.3 1,050.5 333.6 376.6 85.4 Income Taxes, Net 798.0 476.6 113.6 13.9 790.7 470.5 112.6 17.5 Securitized Stranded Costs 457.3 — — 457.3 478.9 — — 478.9 Goodwill-related 289.4 — 248.4 — 297.8 — 255.7 — Derivative Liabilities 213.3 213.3 — — 249.2 249.2 — — Asset Retirement Obligations 121.0 34.7 64.1 4.2 115.0 33.6 59.8 4.1 Other Regulatory Assets 189.5 28.1 33.5 15.2 150.0 29.9 37.7 15.8 Total Regulatory Assets 5,732.6 2,060.2 1,680.5 736.9 5,715.8 2,084.8 1,579.2 786.4 Less: Current Portion 1,163.4 396.4 419.7 93.2 1,129.1 371.6 444.0 107.2 Total Long-Term Regulatory Assets $ 4,569.2 $ 1,663.8 $ 1,260.8 $ 643.7 $ 4,586.7 $ 1,713.2 $ 1,135.2 $ 679.2 Regulatory Costs in Long-Term Assets: Eversource's regulated companies had $286.8 million (including $123.2 million for CL&P, $91.1 million for NSTAR Electric and $1.3 million for PSNH) and $252.5 million (including $114.9 million for CL&P, $85.0 million for NSTAR Electric and $3.4 million for PSNH) of additional regulatory costs as of June 30, 2022 and December 31, 2021, respectively, that were included in long-term assets on the balance sheets. These amounts represent incurred costs for which recovery has not yet been specifically approved by the applicable regulatory agency. However, based on regulatory policies or past precedent on similar costs, management believes it is probable that these costs will ultimately be approved and recovered from customers in rates. As of June 30, 2022 and December 31, 2021, these regulatory costs included incremental COVID-19 related non-tracked uncollectible expense deferred of $37.6 million and $33.0 million at Eversource, $15.3 million and $18.0 million at CL&P, and $4.8 million and $6.1 million at NSTAR Electric, respectively. Regulatory Liabilities: The components of regulatory liabilities were as follows: As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH EDIT due to Tax Cuts and Jobs Act of 2017 $ 2,646.1 $ 989.4 $ 962.1 $ 353.0 $ 2,685.2 $ 996.1 $ 984.5 $ 359.2 Cost of Removal 653.9 113.6 395.0 19.0 649.6 100.1 381.0 17.2 Regulatory Tracking Mechanisms 701.9 319.4 232.7 99.8 448.4 182.0 185.1 107.0 Deferred Portion of Non-Service Income 209.7 23.3 115.2 21.8 148.3 12.0 90.7 14.9 Benefit Costs 116.0 — 92.4 — 133.5 — 107.4 — AFUDC - Transmission 88.9 44.9 44.0 — 81.0 43.2 37.8 — CL&P Settlement Agreement and Storm 6.4 6.4 — — 81.3 81.3 — — Other Regulatory Liabilities 223.7 57.9 4.4 6.7 241.4 45.1 0.8 3.3 Total Regulatory Liabilities 4,646.6 1,554.9 1,845.8 500.3 4,468.7 1,459.8 1,787.3 501.6 Less: Current Portion 759.7 337.2 274.1 106.6 602.4 266.5 228.2 120.2 Total Long-Term Regulatory Liabilities $ 3,886.9 $ 1,217.7 $ 1,571.7 $ 393.7 $ 3,866.3 $ 1,193.3 $ 1,559.1 $ 381.4

PROPERTY, PLANT AND EQUIPMENT A

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION	6 Months Ended
	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION	PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION The following tables summarize property, plant and equipment by asset category: Eversource As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) Distribution - Electric $ 18,001.8 $ 17,679.1 Distribution - Natural Gas 6,819.5 6,694.8 Transmission - Electric 13,229.5 12,882.4 Distribution - Water 1,940.2 1,900.9 Solar 200.9 200.9 Utility 40,191.9 39,358.1 Other (1) 1,630.1 1,469.5 Property, Plant and Equipment, Gross 41,822.0 40,827.6 Less: Accumulated Depreciation Utility (9,046.9) (8,885.2) Other (640.1) (580.1) Total Accumulated Depreciation (9,687.0) (9,465.3) Property, Plant and Equipment, Net 32,135.0 31,362.3 Construction Work in Progress 2,272.2 2,015.4 Total Property, Plant and Equipment, Net $ 34,407.2 $ 33,377.7 As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) CL&P NSTAR PSNH CL&P NSTAR PSNH Distribution - Electric $ 7,252.7 $ 8,265.0 $ 2,524.4 $ 7,117.6 $ 8,105.5 $ 2,496.2 Transmission - Electric 5,986.3 5,207.0 2,037.9 5,859.0 5,090.5 1,934.6 Solar — 200.9 — — 200.9 — Property, Plant and Equipment, Gross 13,239.0 13,672.9 4,562.3 12,976.6 13,396.9 4,430.8 Less: Accumulated Depreciation (2,589.2) (3,311.0) (911.9) (2,572.1) (3,227.3) (908.4) Property, Plant and Equipment, Net 10,649.8 10,361.9 3,650.4 10,404.5 10,169.6 3,522.4 Construction Work in Progress 441.2 787.5 169.8 399.0 707.0 134.1 Total Property, Plant and Equipment, Net $ 11,091.0 $ 11,149.4 $ 3,820.2 $ 10,803.5 $ 10,876.6 $ 3,656.5 (1) These assets are primarily comprised of computer software, hardware and equipment at Eversource Service and buildings at The Rocky River Realty Company.

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTS The electric and natural gas companies purchase and procure energy and energy-related products, which are subject to price volatility, for their customers. The costs associated with supplying energy to customers are recoverable from customers in future rates. These regulated companies manage the risks associated with the price volatility of energy and energy-related products through the use of derivative and non-derivative contracts. Many of the derivative contracts meet the definition of, and are designated as, normal and qualify for accrual accounting under the applicable accounting guidance. The costs and benefits of derivative contracts that meet the definition of normal are recognized in Operating Expenses on the statements of income as electricity or natural gas is delivered. Derivative contracts that are not designated as normal are recorded at fair value as current or long-term Derivative Assets or Derivative Liabilities on the balance sheets. For the electric and natural gas companies, regulatory assets or regulatory liabilities are recorded to offset the fair values of derivatives, as contract settlement amounts are recovered from, or refunded to, customers in their respective energy supply rates. The gross fair values of derivative assets and liabilities with the same counterparty are offset and reported as net Derivative Assets or Derivative Liabilities, with current and long-term portions, on the balance sheets. The following table presents the gross fair values of contracts, categorized by risk type, and the net amounts recorded as current or long-term derivative assets or liabilities: As of June 30, 2022 As of December 31, 2021 CL&P (Millions of Dollars) Fair Value Hierarchy Commodity Supply and Price Risk Netting (1) Net Amount Commodity Supply and Price Risk Netting (1) Net Amount Current Derivative Assets Level 3 $ 15.2 $ (0.5) $ 14.7 $ 14.7 $ (1.0) $ 13.7 Long-Term Derivative Assets Level 3 37.7 (1.1) 36.6 46.9 (0.9) 46.0 Current Derivative Liabilities Level 3 (75.9) — (75.9) (73.5) — (73.5) Long-Term Derivative Liabilities Level 3 (188.7) — (188.7) (235.4) — (235.4) (1) Amounts represent derivative assets and liabilities that Eversource elected to record net on the balance sheets. These amounts are subject to master netting agreements or similar agreements for which the right of offset exists. Derivative Contracts at Fair Value with Offsetting Regulatory Amounts Commodity Supply and Price Risk Management : As required by regulation, CL&P, along with UI, has capacity-related contracts with generation facilities. CL&P has a sharing agreement with UI, with 80 percent of the costs or benefits of each contract borne by or allocated to CL&P and 20 percent borne by or allocated to UI. The combined capacities of these contracts as of both June 30, 2022 and December 31, 2021 were 675 MW. The capacity contracts extend through 2026 and obligate both CL&P and UI to make or receive payments on a monthly basis to or from the generation facilities based on the difference between a set capacity price and the capacity market price received in the ISO-NE capacity markets. For the three months ended June 30, 2022 and 2021, there were gains of $2.6 million and $0.9 million, respectively, deferred as regulatory costs, which reflect the change in fair value associated with Eversource's derivative contracts. For the six months ended June 30, 2022 and 2021, there were gains of $8.8 million and losses of $10.2 million, respectively. Fair Value Measurements of Derivative Instruments The fair value of derivative contracts classified as Level 3 utilizes both significant observable and unobservable inputs. The fair value is modeled using income techniques, such as discounted cash flow valuations adjusted for assumptions related to exit price. Valuations of derivative contracts using a discounted cash flow methodology include assumptions regarding the timing and likelihood of scheduled payments and also reflect non-performance risk, including credit, using the default probability approach based on the counterparty's credit rating for assets and the Company's credit rating for liabilities. Significant observable inputs for valuations of these contracts include energy-related product prices in future years for which quoted prices in an active market exist. Valuations incorporate estimates of premiums or discounts that would be required by a market participant to arrive at an exit price, using historical market transactions adjusted for the terms of the contract. Fair value measurements categorized in Level 3 of the fair value hierarchy are prepared by individuals with expertise in valuation techniques, pricing of energy-related products, and accounting requirements. The following is a summary of the significant unobservable inputs utilized in the valuations of the derivative contracts classified as Level 3: As of June 30, 2022 As of December 31, 2021 CL&P Range Average Period Covered Range Average Period Covered Forward Reserve Prices $ 0.50 — $0.50 $ 0.50 per kW-Month 2022 - 2024 $ 0.50 — $1.15 $ 0.82 per kW-Month 2022 - 2024 Exit price premiums of 3.9 percent through 8.2 percent, or a weighted average of 7.1 percent, are also Level 3 significant unobservable inputs applied to these contracts and reflect the uncertainty and illiquidity premiums that would be required based on the most recent market activity available for similar type contracts. The risk premium was weighted by the relative fair value of the net derivative instruments. As of December 31, 2021, Level 3 unobservable inputs also utilized in the valuation of CL&P’s capacity-related contracts included capacity prices of $2.61 per kW-Month over the period 2025 through 2026. Beginning in the first quarter of 2022, these capacity price inputs are now observable. Significant increases or decreases in future capacity or forward reserve prices in isolation would decrease or increase, respectively, the fair value of the derivative liability. Any increases in risk premiums would increase the fair value of the derivative liability. Changes in these fair values are recorded as a regulatory asset or liability and do not impact net income. The following table presents changes in the Level 3 category of derivative assets and derivative liabilities measured at fair value on a recurring basis. The derivative assets and liabilities are presented on a net basis. CL&P For the Three Months Ended June 30, For the Six Months Ended June 30, (Millions of Dollars) 2022 2021 2022 2021 Derivatives, Net: Fair Value as of Beginning of Period $ (229.4) $ (293.1) $ (249.2) $ (293.1) Net Realized/Unrealized Gains/(Losses) Included in Regulatory Assets 2.6 0.9 8.8 (11.5) Settlements 13.5 12.5 27.1 24.9 Fair Value as of End of Period $ (213.3) $ (279.7) $ (213.3) $ (279.7)

MARKETABLE SECURITIES

MARKETABLE SECURITIES	6 Months Ended
	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
MARKETABLE SECURITIES	MARKETABLE SECURITIES Eversource holds marketable securities that are primarily used to fund certain non-qualified executive benefits. The trusts that hold these marketable securities are not subject to regulatory oversight by state or federal agencies. Eversource’s marketable securities also include the CYAPC and YAEC legally restricted trusts that each hold equity and available-for-sale debt securities to fund the spent nuclear fuel removal obligations of their nuclear fuel storage facilities. Equity and available-for-sale debt marketable securities are recorded at fair value, with the current portion recorded in Prepayments and Other Current Assets and the long-term portion recorded in Marketable Securities on the balance sheets. Equity Securities: Unrealized gains and losses on equity securities held in Eversource's non-qualified executive benefit trust are recorded in Other Income, Net on the statements of income. The fair value of these equity securities as of June 30, 2022 and December 31, 2021 was $26.4 million and $40.2 million, respectively. For the three months ended June 30, 2022 and 2021, there were unrealized losses of $4.7 million and unrealized gains of $1.9 million recorded in Other Income, Net related to these equity securities, respectively. For the six months ended June 30, 2022 and 2021, there were unrealized losses of $9.1 million and unrealized gains of $3.0 million recorded in Other Income, Net related to these equity securities, respectively. Eversource's equity securities also include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts, which had fair values of $182.4 million and $214.0 million as of June 30, 2022 and December 31, 2021, respectively. Unrealized gains and losses for these spent nuclear fuel trusts are subject to regulatory accounting treatment and are recorded in Marketable Securities with the corresponding offset to long-term liabilities on the balance sheets, with no impact on the statements of income. Available-for-Sale Debt Securities: The following is a summary of the available-for-sale debt securities: As of June 30, 2022 As of December 31, 2021 Eversource (Millions of Dollars) Amortized Cost Pre-Tax Pre-Tax Fair Value Amortized Cost Pre-Tax Pre-Tax Fair Value Debt Securities $ 207.9 $ 0.5 $ (12.3) $ 196.1 $ 214.5 $ 5.1 $ (0.2) $ 219.4 Eversource's debt securities include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts in the amounts of $174.4 million and $189.9 million as of June 30, 2022 and December 31, 2021, respectively. Unrealized gains and losses on available-for-sale debt securities held in Eversource's non-qualified benefit trust are recorded in Accumulated Other Comprehensive Income, excluding amounts related to credit losses or losses on securities intended to be sold, which are recorded in Other Income, Net. There have been no significant unrealized losses and no credit losses for the three and six months ended June 30, 2022 and 2021, and no allowance for credit losses as of June 30, 2022. Factors considered in determining whether a credit loss exists include adverse conditions specifically affecting the issuer, the payment history, ratings and rating changes of the security, and the severity of the impairment. For asset-backed debt securities, underlying collateral and expected future cash flows are also evaluated. Debt securities included in Eversource's non-qualified benefit trust portfolio are investment-grade bonds with a lower default risk based on their credit quality. As of June 30, 2022, the contractual maturities of available-for-sale debt securities were as follows: Eversource (Millions of Dollars) Amortized Cost Fair Value Less than one year (1) $ 18.5 $ 18.4 One to five years 57.6 56.7 Six to ten years 41.2 38.0 Greater than ten years 90.6 83.0 Total Debt Securities $ 207.9 $ 196.1 (1) Amounts in the Less than one year category include securities in the CYAPC and YAEC spent nuclear fuel trusts, which are restricted and are classified in long-term Marketable Securities on the balance sheets. Realized Gains and Losses: Realized gains and losses are recorded in Other Income, Net for Eversource's benefit trust and are offset in long-term liabilities for CYAPC and YAEC. Eversource utilizes the specific identification basis method for the Eversource non-qualified benefit trust, and the average cost basis method for the CYAPC and YAEC spent nuclear fuel trusts to compute the realized gains and losses on the sale of marketable securities. Fair Value Measurements: The following table presents the marketable securities recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy: Eversource (Millions of Dollars) As of June 30, 2022 As of December 31, 2021 Level 1: Mutual Funds and Equities $ 208.8 $ 254.2 Money Market Funds 17.2 31.3 Total Level 1 $ 226.0 $ 285.5 Level 2: U.S. Government Issued Debt Securities (Agency and Treasury) $ 84.2 $ 81.3 Corporate Debt Securities 54.9 65.3 Asset-Backed Debt Securities 9.6 12.6 Municipal Bonds 13.8 12.3 Other Fixed Income Securities 16.4 16.6 Total Level 2 $ 178.9 $ 188.1 Total Marketable Securities $ 404.9 $ 473.6

SHORT-TERM AND LONG-TERM DEBT

SHORT-TERM AND LONG-TERM DEBT	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
SHORT-TERM AND LONG-TERM DEBT	SHORT-TERM AND LONG-TERM DEBT Short-Term Debt - Commercial Paper Programs and Credit Agreements : Eversource parent has a $2.00 billion commercial paper program allowing Eversource parent to issue commercial paper as a form of short-term debt. Eversource parent, CL&P, PSNH, NSTAR Gas, Yankee Gas, EGMA and Aquarion Water Company of Connecticut are parties to a five-year $2.00 billion revolving credit facility, which terminates on October 15, 2026. This revolving credit facility serves to backstop Eversource parent's $2.00 billion commercial paper program. NSTAR Electric has a $650 million commercial paper program allowing NSTAR Electric to issue commercial paper as a form of short-term debt. NSTAR Electric is also a party to a five-year $650 million revolving credit facility, which terminates on October 15, 2026. This revolving credit facility serves to backstop NSTAR Electric's $650 million commercial paper program. The amount of borrowings outstanding and available under the commercial paper programs were as follows: Borrowings Outstanding as of Available Borrowing Capacity as of Weighted-Average Interest Rate as of June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 (Millions of Dollars) Eversource Parent Commercial Paper Program $ 124.5 $ 1,343.0 $ 1,875.5 $ 657.0 1.81 % 0.31 % NSTAR Electric Commercial Paper Program 63.0 162.5 587.0 487.5 1.63 % 0.14 % There were no borrowings outstanding on the revolving credit facilities as of June 30, 2022 or December 31, 2021. CL&P and PSNH have uncommitted line of credit agreements totaling $450 million and $300 million, respectively, which will expire on May 12, 2023. There are no borrowings outstanding on either the CL&P or PSNH uncommitted line of credit agreements as of June 30, 2022. Amounts outstanding under the commercial paper programs are included in Notes Payable and classified in current liabilities on the Eversource and NSTAR Electric balance sheets, as all borrowings are outstanding for no more than 364 days at one time. As a result of the NSTAR Gas long-term debt issuance in July 2022, $88.7 million of commercial paper borrowings under the Eversource parent commercial paper program were reclassified as Long-Term Debt as of June 30, 2022. Intercompany Borrowings: Eversource parent uses its available capital resources to provide loans to its subsidiaries to assist in meeting their short-term borrowing needs. Eversource parent records intercompany interest income from its loans to subsidiaries, which is eliminated in consolidation. Intercompany loans from Eversource parent to its subsidiaries are eliminated in consolidation on Eversource's balance sheets. As of June 30, 2022, there were intercompany loans from Eversource parent to CL&P of $67.5 million, to PSNH of $89.3 million, and to a subsidiary of NSTAR Electric of $3.2 million. As of December 31, 2021, there were intercompany loans from Eversource parent to PSNH of $110.6 million. Intercompany loans from Eversource parent are included in Notes Payable to Eversource Parent and classified in current liabilities on the respective subsidiary's balance sheets. Sources and Uses of Cash: The Company expects the future operating cash flows of Eversource, CL&P, NSTAR Electric and PSNH, along with existing borrowing availability and access to both debt and equity markets, will be sufficient to meet any working capital and future operating requirements, and capital investment forecasted opportunities. Availability under Long-Term Debt Issuance Authorizations: On June 14, 2022, the DPU approved NSTAR Gas’ request for authorization to issue up to $325 million in long-term debt through December 31, 2024. Long-Term Debt Issuances and Repayments: The following table summarizes long-term debt issuances and repayments: (Millions of Dollars) Issuance/(Repayment) Issue Date or Repayment Date Maturity Date Use of Proceeds for Issuance/ NSTAR Electric: 4.55% 2022 Debentures $ 450.0 May 2022 June 2052 Repaid short-term debt, paid capital expenditures and working capital Other: Eversource Parent 2.90% Series V Senior Notes 650.0 February 2022 March 2027 Repaid Series K Senior Notes at maturity and short-term debt Eversource Parent 3.38% Series W Senior Notes 650.0 February 2022 March 2032 Repaid Series K Senior Notes at maturity and short-term debt Eversource Parent 4.20% Series X Senior Notes 900.0 June 2022 June 2024 Repaid short-term debt and paid working capital Eversource Parent 4.60% Series Y Senior Notes 600.0 June 2022 July 2027 Repaid short-term debt and paid working capital Eversource Parent 2.75% Series K Senior Notes (750.0) March 2022 March 2022 Paid at maturity Yankee Gas 8.48% Series B First Mortgage Bonds (20.0) March 2022 March 2022 Paid at maturity EGMA 4.70% Series C First Mortgage Bonds 100.0 June 2022 June 2052 Repaid short-term debt, paid capital expenditures and for general corporate purposes NSTAR Gas 4.40% Series V First Mortgage Bonds 125.0 July 2022 August 2032 Repaid short-term debt, paid capital expenditures and for general corporate purposes

RATE REDUCTION BONDS AND VARIAB

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES	6 Months Ended
	Jun. 30, 2022
Rate Reduction Bonds and Variable Interest Entity [Abstract]
RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES	RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES Rate Reduction Bonds: In May 2018, PSNH Funding, a wholly-owned subsidiary of PSNH, issued $635.7 million of securitized RRBs in multiple tranches with a weighted average interest rate of 3.66 percent, and final maturity dates ranging from 2026 to 2035. The RRBs are expected to be repaid by February 1, 2033. RRB payments consist of principal and interest and are paid semi-annually, beginning on February 1, 2019. The RRBs were issued pursuant to a finance order issued by the NHPUC in January 2018 to recover remaining costs resulting from the divestiture of PSNH’s generation assets. PSNH Funding was formed solely to issue RRBs to finance PSNH's unrecovered remaining costs associated with the divestiture of its generation assets. PSNH Funding is considered a VIE primarily because the equity capitalization is insufficient to support its operations. PSNH has the power to direct the significant activities of the VIE and is most closely associated with the VIE as compared to other interest holders. Therefore, PSNH is considered the primary beneficiary and consolidates PSNH Funding in its consolidated financial statements. The following tables summarize the impact of PSNH Funding on PSNH's balance sheets and income statements: (Millions of Dollars) PSNH Balance Sheets: As of June 30, 2022 As of December 31, 2021 Restricted Cash - Current Portion (included in Current Assets) $ 30.7 $ 31.1 Restricted Cash - Long-Term Portion (included in Other Long-Term Assets) 3.2 3.2 Securitized Stranded Cost (included in Regulatory Assets) 457.3 478.9 Other Regulatory Liabilities (included in Regulatory Liabilities) 5.2 5.4 Accrued Interest (included in Other Current Liabilities) 7.2 7.5 Rate Reduction Bonds - Current Portion 43.2 43.2 Rate Reduction Bonds - Long-Term Portion 432.1 453.7 (Millions of Dollars) PSNH Income Statements: For the Three Months Ended For the Six Months Ended June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net) $ 10.8 $ 10.8 $ 21.6 $ 21.6 Interest Expense on RRB Principal (included in Interest Expense) 4.3 4.6 8.7 9.3

PENSION BENEFITS AND POSTRETIRE

PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION	6 Months Ended
	Jun. 30, 2022
Postemployment Benefits [Abstract]
PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION	PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSIONEversource provides defined benefit retirement plans (Pension Plans) that cover eligible employees. In addition to the Pension Plans, Eversource maintains non-qualified defined benefit retirement plans (SERP Plans), which provide benefits in excess of Internal Revenue Code limitations to eligible participants consisting of current and retired employees. Eversource also provides defined benefit postretirement plans (PBOP Plans) that provide life insurance and a health reimbursement arrangement created for the purpose of reimbursing retirees and dependents for health insurance premiums and certain medical expenses to eligible employees that meet certain age and service eligibility requirements. The components of net periodic benefit plan expense/(income) for the Pension, SERP and PBOP Plans, prior to amounts capitalized as Property, Plant and Equipment or deferred as regulatory assets/(liabilities) for future recovery or refund, are shown below. The service cost component of net periodic benefit plan expense/(income), less the capitalized portion, is included in Operations and Maintenance expense on the statements of income. The remaining components of net periodic benefit plan expense/(income), less the deferred portion, are included in Other Income, Net on the statements of income. Pension, SERP and PBOP expense/(income) reflected in the statements of cash flows for CL&P, NSTAR Electric and PSNH does not include intercompany allocations of net periodic benefit plan expense/(income), as these amounts are cash settled on a short-term basis. Pension and SERP PBOP For the Three Months Ended June 30, 2022 For the Three Months Ended June 30, 2022 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Service Cost $ 17.5 $ 4.7 $ 3.4 $ 1.7 $ 3.0 $ 0.5 $ 0.5 $ 0.3 Interest Cost 38.6 7.8 8.2 4.2 5.1 0.9 1.3 0.6 Expected Return on Plan Assets (130.7) (26.5) (32.1) (14.0) (22.6) (2.8) (10.6) (1.7) Actuarial Losses, net 28.4 4.0 8.1 1.9 — — — — Prior Service Cost/(Credit) 0.3 — 0.1 — (5.4) 0.3 (4.2) 0.1 Total Net Periodic Benefit Plan Income $ (45.9) $ (10.0) $ (12.3) $ (6.2) $ (19.9) $ (1.1) $ (13.0) $ (0.7) Intercompany Income Allocations N/A $ (4.1) $ (3.2) $ (0.9) N/A $ (0.9) $ (0.9) $ (0.3) Pension and SERP PBOP For the Six Months Ended June 30, 2022 For the Six Months Ended June 30, 2022 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 35.2 $ 9.2 $ 7.0 $ 3.5 $ 5.8 $ 1.0 $ 1.0 $ 0.5 Interest Cost 77.2 15.6 16.3 8.4 10.1 1.8 2.6 1.1 Expected Return on Plan Assets (262.4) (53.1) (64.1) (28.1) (45.0) (5.6) (21.2) (3.3) Actuarial Losses, net 59.1 8.2 16.6 4.1 — — — — Prior Service Cost/(Credit) 0.7 — 0.2 — (10.8) 0.5 (8.5) 0.2 Total Net Periodic Benefit Plan Income $ (90.2) $ (20.1) $ (24.0) $ (12.1) $ (39.9) $ (2.3) $ (26.1) $ (1.5) Intercompany Income Allocations N/A $ (7.9) $ (6.1) $ (1.7) N/A $ (1.8) $ (1.8) $ (0.6) Pension and SERP PBOP For the Three Months Ended June 30, 2021 For the Three Months Ended June 30, 2021 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 18.4 $ 5.5 $ 3.9 $ 2.2 $ 3.3 $ 0.6 $ 0.6 $ 0.3 Interest Cost 27.1 6.7 6.7 3.6 4.2 0.8 1.1 0.4 Expected Return on Plan Assets (87.4) (21.7) (27.1) (11.8) (19.8) (2.6) (9.2) (1.5) Actuarial Loss 47.8 10.8 15.3 5.2 1.3 0.4 0.5 0.1 Prior Service Cost/(Credit) 0.3 — 0.1 — (5.3) 0.3 (4.2) 0.1 Total Net Periodic Benefit Plan Expense/(Income) $ 6.2 $ 1.3 $ (1.1) $ (0.8) $ (16.3) $ (0.5) $ (11.2) $ (0.6) Intercompany Expense/(Income) Allocations N/A $ 2.3 $ 2.5 $ 0.7 N/A $ (0.6) $ (0.6) $ (0.2) Pension and SERP PBOP For the Six Months Ended June 30, 2021 For the Six Months Ended June 30, 2021 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 39.7 $ 11.8 $ 7.9 $ 4.4 $ 6.8 $ 1.2 $ 1.2 $ 0.6 Interest Cost 59.7 14.0 13.4 7.2 8.6 1.6 2.2 0.9 Expected Return on Plan Assets (196.3) (43.3) (54.0) (23.7) (39.5) (5.2) (18.5) (3.0) Actuarial Loss 109.4 23.8 30.8 10.1 3.9 0.8 1.1 0.3 Prior Service Cost/(Credit) 0.6 — 0.2 — (10.6) 0.5 (8.4) 0.2 Total Net Periodic Benefit Plan Expense/(Income) $ 13.1 $ 6.3 $ (1.7) $ (2.0) $ (30.8) $ (1.1) $ (22.4) $ (1.0) Intercompany Expense/(Income) Allocations N/A $ 3.6 $ 4.0 $ 1.2 N/A $ (0.9) $ (1.0) $ (0.3)

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES A. Environmental Matters Eversource, CL&P, NSTAR Electric and PSNH are subject to environmental laws and regulations intended to mitigate or remove the effect of past operations and improve or maintain the quality of the environment. These laws and regulations require the removal or the remedy of the effect on the environment of the disposal or release of certain specified hazardous substances at current and former operating sites. Eversource, CL&P, NSTAR Electric and PSNH have an active environmental auditing and training program and each believes it is substantially in compliance with all enacted laws and regulations. The number of environmental sites and related reserves for which remediation or long-term monitoring, preliminary site work or site assessment is being performed are as follows: As of June 30, 2022 As of December 31, 2021 Number of Sites Reserve Number of Sites Reserve Eversource 62 $ 121.3 61 $ 115.4 CL&P 14 14.3 14 13.9 NSTAR Electric 11 3.6 11 3.3 PSNH 9 6.3 9 6.3 Included in the number of sites and reserve amounts above are former MGP sites that were operated several decades ago and manufactured natural gas from coal and other processes, which resulted in certain by-products remaining in the environment that may pose a potential risk to human health and the environment, for which Eversource may have potential liability. The reserve balances related to these former MGP sites were $110.5 million and $105.6 million as of June 30, 2022 and December 31, 2021, respectively, and related primarily to the natural gas business segment. These reserve estimates are subjective in nature as they take into consideration several different remediation options at each specific site. The reliability and precision of these estimates can be affected by several factors, including new information concerning either the level of contamination at the site, the extent of Eversource's, CL&P's, NSTAR Electric's and PSNH's responsibility for remediation or the extent of remediation required, recently enacted laws and regulations or changes in cost estimates due to certain economic factors. It is possible that new information or future developments could require a reassessment of the potential exposure to required environmental remediation. As this information becomes available, management will continue to assess the potential exposure and adjust the reserves accordingly. B. Long-Term Contractual Arrangements The following is an update to the current status of long-term contractual arrangements set forth in Note 13B of the Eversource 2021 Form 10-K. Renewable Energy : Renewable energy contracts include non-cancelable commitments under contracts of NSTAR Electric for the purchase of energy and RECs from renewable energy facilities. NSTAR Electric (Millions of Dollars) 2022 2023 2024 2025 2026 Thereafter Total Renewable Energy $ 50.4 $ 78.3 $ 269.4 $ 315.8 $ 322.1 $ 5,812.2 $ 6,848.2 The table includes long-term commitments of NSTAR Electric pertaining to the Vineyard Wind LLC contract awarded under the Massachusetts Clean Energy 83C procurement solicitation. NSTAR Electric, along with other Massachusetts distribution companies, entered into 20-year contracts to purchase electricity generated by this 800 megawatt offshore wind project. Construction on the Vineyard Wind project commenced in 2022. Estimated energy costs under this contract are expected to begin when the facilities are in service in 2024 and range between $240 million and $375 million per year und er NSTAR Electric’s 20-year contract, totaling approximately $6.0 billion. C. Guarantees and Indemnifications In the normal course of business, Eversource parent provides credit assurances on behalf of its subsidiaries, including CL&P, NSTAR Electric and PSNH, in the form of guarantees. Management does not anticipate a material impact to net income or cash flows as a result of these various guarantees and indemnifications. Guarantees issued on behalf of unconsolidated entities, including equity method offshore wind investments, for which Eversource parent is the guarantor, are recorded at fair value as a liability on the balance sheet at the inception of the guarantee. Eversource regularly reviews performance risk under these guarantee arrangements, and in the event it becomes probable that Eversource parent will be required to perform under the guarantee, the amount of probable payment will be recorded. The fair value of guarantees issued on behalf of unconsolidated entities are recorded within Other Long-Term Liabilities on the balance sheet, and were $4.7 million and $7.3 million as of June 30, 2022 and December 31, 2021, respectively. The following table summarizes Eversource parent's exposure to guarantees and indemnifications of its subsidiaries and affiliates to external parties, and primarily relates to its offshore wind business: As of June 30, 2022 Company (Obligor) Description Maximum Exposure Expiration Dates North East Offshore LLC Construction-related purchase agreements with third-party contractors (1) $ 889.9 (1) Sunrise Wind LLC Construction-related purchase agreements with third-party contractors (2) 353.9 2025 - 2026 Revolution Wind, LLC Construction-related purchase agreements with third-party contractors (3) 353.8 2024 - 2027 South Fork Wind, LLC Construction-related purchase agreements with third-party contractors (4) 165.1 2023 - 2026 Eversource Investment LLC Funding and indemnification obligations of North East Offshore LLC (5) 100.9 (5) South Fork Wind, LLC Power Purchase Agreement Security (6) 7.1 (6) Sunrise Wind LLC OREC capacity production (7) 2.2 (7) Bay State Wind LLC Real estate purchase 2.5 2023 South Fork Wind, LLC Transmission interconnection 1.2 — Eversource Investment LLC Letters of Credit (8) 4.3 — Various Surety bonds (9) 35.7 2022 - 2023 Eversource Service Lease payments for real estate 0.6 2024 (1) Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, North East Offshore LLC (NEO), under which Eversource parent agreed to guarantee 50 percent of NEO’s performance of obligations under certain purchase agreements with third-party contractors, in an aggregate amount not to exceed $1.3 billion with an expiration date in 2025. Eversource parent also issued a separate guarantee to Ørsted on behalf of NEO, under which Eversource parent agreed to guarantee 50 percent of NEO’s payment obligations under certain offshore wind project construction-related agreements with Ørsted in an aggregate amount not to exceed $62.5 million and expiring upon full performance of the guaranteed obligation. Any amounts paid under this guarantee to Ørsted will count toward, but not increase, the maximum amount of the Funding Guarantee described in Note 5, below. (2) Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an aggregate amount not to exceed $464.7 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from March 2025 and April 2026 and (ii) full performance of the guaranteed obligations. (3) Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Revolution Wind, LLC, whereby Eversource parent will guarantee Revolution Wind, LLC's performance of certain obligations, in an aggregate amount not to exceed $409.3 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from October 2024 and November 2027 and (ii) full performance of the guaranteed obligations. (4) Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations in connection with construction-related purchase agreements. Under these guarantees, Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in a total aggregate amount not to exceed $207.1 million. Eversource parent’s obligations under these guarantees expire upon the earlier of (i) dates ranging from June 2023 and August 2026 and (ii) full performance of the guaranteed obligations. (5) Eversource parent issued a guarantee (Funding Guarantee) on behalf of Eversource Investment LLC (EI), its wholly-owned subsidiary that holds a 50 percent ownership interest in NEO, under which Eversource parent agreed to guarantee certain funding obligations and certain indemnification payments of EI under the operating agreement of NEO, in an amount not to exceed $910 million. The guaranteed obligations include payment of EI's funding obligations during the construction phase of NEO’s underlying offshore wind projects and indemnification obligations associated with third party credit support for its investment in NEO. Eversource parent’s obligations under the Funding Guarantee expire upon the full performance of the guaranteed obligations. (6) Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in an amount not to exceed $7.1 million, under a Power Purchase Agreement between the Long Island Power Authority and South Fork Wind, LLC (the Agreement). The guarantee expires upon the later of (i) the end of the Agreement term and (ii) full performance of the guarantee obligations. (7) Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an amount not to exceed $15.4 million, under the Offshore Wind Renewable Energy Certificate Purchase and Sale Agreement (the Agreement). The Agreement was executed by and between the New York State Energy Research and Development Authority (NYSERDA) and Sunrise Wind LLC. The guarantee expires upon the full performance of the guaranteed obligations. (8) On September 16, 2020, Eversource parent entered into a guarantee on behalf of EI, which holds Eversource's investments in offshore wind-related equity method investments, under which Eversource parent would guarantee EI's obligations under a letter of credit facility with a financial institution that EI may request in an aggregate amount of up to approximately $25 million. In January 2022, Eversource parent issued two letters of credit on behalf of South Fork Wind, LLC related to future decommissioning obligations of certain onshore transmission assets totaling $4.3 million. (9) Surety bond expiration dates reflect termination dates, the majority of which will be renewed or extended. Certain surety bonds contain credit ratings triggers that would require Eversource parent to post collateral in the event that the unsecured debt credit ratings of Eversource parent are downgraded. D. Spent Nuclear Fuel Obligations - Yankee Companies CL&P, NSTAR Electric and PSNH have plant closure and fuel storage cost obligations to the Yankee Companies, which have each completed the physical decommissioning of their respective nuclear power facilities and are now engaged in the long-term storage of their spent fuel. The Yankee Companies fund these costs through litigation proceeds received from the DOE and, to the extent necessary, through wholesale, FERC-approved rates charged under power purchase agreements with several New England utilities, including CL&P, NSTAR Electric and PSNH. CL&P, NSTAR Electric and PSNH, in turn recover these costs from their customers through state regulatory commission-approved retail rates. The Yankee Companies collect amounts that management believes are adequate to recover the remaining plant closure and fuel storage cost estimates for the respective plants. Management believes CL&P and NSTAR Electric will recover their shares of these obligations from their customers. PSNH has recovered its total share of these costs from its customers. Spent Nuclear Fuel Litigation: The Yankee Companies have filed complaints against the DOE in the Court of Federal Claims seeking monetary damages resulting from the DOE's failure to accept delivery of, and provide for a permanent facility to store, spent nuclear fuel pursuant to the terms of the 1983 spent fuel and high-level waste disposal contracts between the Yankee Companies and the DOE. The court previously awarded the Yankee Companies damages for Phases I, II, III and IV of litigation resulting from the DOE's failure to meet its contractual obligations. These Phases covered damages incurred in the years 1998 through 2016, and the awarded damages have been received by the Yankee Companies with certain amounts of the damages refunded to their customers. DOE Phase V Damages - On March 25, 2021, each of the Yankee Companies filed a fifth set of lawsuits against the DOE in the Court of Federal Claims. The Yankee Companies filed claims seeking monetary damages totaling $120.4 million for CYAPC, YAEC and MYAPC, resulting from the DOE's failure to begin accepting spent nuclear fuel for disposal covering the years from 2017 to 2020 (DOE Phase V). The DOE Phase V trial is expected to begin in the third quarter of 2023. E. FERC ROE Complaints Four separate complaints were filed at the FERC by combinations of New England state attorneys general, state regulatory commissions, consumer advocates, consumer groups, municipal parties and other parties (collectively, the Complainants). In each of the first three complaints, filed on October 1, 2011, December 27, 2012, and July 31, 2014, respectively, the Complainants challenged the NETOs' base ROE of 11.14 percent that had been utilized since 2005 and sought an order to reduce it prospectively from the date of the final FERC order and for the separate 15-month complaint periods. In the fourth complaint, filed April 29, 2016, the Complainants challenged the NETOs' base ROE billed of 10.57 percent and the maximum ROE for transmission incentive (incentive cap) of 11.74 percent, asserting that these ROEs were unjust and unreasonable. The ROE originally billed during the period October 1, 2011 (beginning of the first complaint period) through October 15, 2014 consisted of a base ROE of 11.14 percent and incentives up to 13.1 percent. On October 16, 2014, the FERC set the base ROE at 10.57 percent and the incentive cap at 11.74 percent for the first complaint period. This was also effective for all prospective billings to customers beginning October 16, 2014. This FERC order was vacated on April 14, 2017 by the U.S. Court of Appeals for the D.C. Circuit (the Court). All amounts associated with the first complaint period have been refunded, which totaled $38.9 million (pre-tax and excluding interest) at Eversource and reflected both the base ROE and incentive cap prescribed by the FERC order. The refund consisted of $22.4 million for CL&P, $13.7 million for NSTAR Electric and $2.8 million for PSNH. Eversource has recorded a reserve of $39.1 million (pre-tax and excluding interest) for the second complaint period as of both June 30, 2022 and December 31, 2021. This reserve represents the difference between the billed rates during the second complaint period and a 10.57 percent base ROE and 11.74 percent incentive cap. The reserve consisted of $21.4 million for CL&P, $14.6 million for NSTAR Electric and $3.1 million for PSNH as of both June 30, 2022 and December 31, 2021. On October 16, 2018, FERC issued an order on all four complaints describing how it intends to address the issues that were remanded by the Court. FERC proposed a new framework to determine (1) whether an existing ROE is unjust and unreasonable and, if so, (2) how to calculate a replacement ROE. Initial briefs were filed by the NETOs, Complainants and FERC Trial Staff on January 11, 2019 and reply briefs were filed on March 8, 2019. The NETOs' brief was supportive of the overall ROE methodology determined in the October 16, 2018 order provided the FERC does not change the proposed methodology or alter its implementation in a manner that has a material impact on the results. The FERC order included illustrative calculations for the first complaint using FERC's proposed frameworks with financial data from that complaint. Those illustrative calculations indicated that for the first complaint period, for the NETOs, which FERC concludes are of average financial risk, the preliminary just and reasonable base ROE is 10.41 percent and the preliminary incentive cap on total ROE is 13.08 percent. If the results of the illustrative calculations were included in a final FERC order for each of the complaint periods, then a 10.41 percent base ROE and a 13.08 percent incentive cap would not have a significant impact on our financial statements for all of the complaint periods. These preliminary calculations are not binding and do not represent what we believe to be the most likely outcome of a final FERC order. On November 21, 2019, FERC issued Opinion No. 569 affecting the two pending transmission ROE complaints against the Midcontinent ISO (MISO) transmission owners, in which FERC adopted a new methodology for determining base ROEs. Various parties sought rehearing. On December 23, 2019, the NETOs filed supplementary materials in the NETOs' four pending cases to respond to this new methodology because of the uncertainty of the applicability to the NETOs' cases. On May 21, 2020, the FERC issued its order in Opinion No. 569-A on the rehearing of the MISO transmission owners' cases, in which FERC again changed its methodology for determining the MISO transmission owners' base ROEs. On November 19, 2020, the FERC issued Opinion No. 569-B denying rehearing of Opinion No. 569-A and reaffirmed the methodology previously adopted in Opinion No. 569-A. The new methodology differs significantly from the methodology proposed by FERC in its October 16, 2018 order to determine the NETOs' base ROEs in its four pending cases. FERC Opinion Nos. 569-A and 569-B are currently under appeal with the Court. Given the significant uncertainty regarding the applicability of the FERC opinions in the MISO transmission owners' two complaint cases to the NETOs' pending four complaint cases, Eversource concluded that there is no reasonable basis for a change to the reserve or recognized ROEs for any of the complaint periods at this time. As well, Eversource cannot reasonably estimate a range of loss for any of the four complaint proceedings at this time. Eversource, CL&P, NSTAR Electric and PSNH currently record revenues at the 10.57 percent base ROE and incentive cap at 11.74 percent established in the October 16, 2014 FERC order. A change of 10 basis points to the base ROE used to establish the reserves would impact Eversource's after-tax earnings by an average of approximately $3 million for each of the four 15-month complaint periods. F. Eversource and NSTAR Electric Boston Harbor Civil Action In 2016, the United States Attorney on behalf of the United States Army Corps of Engineers filed a civil action in the United States District Court for the District of Massachusetts against NSTAR Electric, HEEC, and the Massachusetts Water Resources Authority (together with NSTAR Electric and HEEC, the "Defendants"). The action alleged that the Defendants failed to comply with certain permitting requirements related to the placement of the HEEC-owned electric distribution cable beneath Boston Harbor. The parties reached a settlement pursuant to which HEEC agreed to install a new 115kV distribution cable across Boston Harbor to Deer Island, utilizing a different route, and remove portions of the existing cable. Construction of the new distribution cable was completed in August 2019, and removal of the portions of the existing cable was completed in January 2020. NSTAR Electric and HEEC continue to finalize the resolution of certain long-term environmental restoration efforts, as required under the current permit. Upon completion of these restoration efforts and subsequent resolution with the United States Army Corps of Engineers, such litigation is expected to be dismissed with prejudice. G. CL&P Regulatory Matters CL&P Tropical Storm Isaias Response Investigation: In August 2020, PURA opened a docket to investigate the preparation for and response to Tropical Storm Isaias by Connecticut utilities, including CL&P. On April 28, 2021, PURA issued a final decision on CL&P’s compliance with its emergency response plan that concluded CL&P failed to comply with certain storm performance standards and was imprudent in certain instances. Specifically, PURA concluded that CL&P did not satisfy the performance standards for managing its municipal liaison program, timely removing electrical hazards from blocked roads, communicating critical information to its customers, or meeting its obligation to secure adequate external contractor and mutual aid resources in a timely manner. Based on its findings, PURA ordered CL&P to adjust its future rates in a pending or future rate proceeding to reflect a monetary penalty in the form of a downward adjustment of 90 basis points in its allowed rate of return on equity (ROE), which is currently 9.25 percent. In its decision, PURA explained that additional monetary penalties and further enforcement orders pursuant to Connecticut statute would be considered in a separate proceeding that was initiated on May 6, 2021.

FAIR VALUE OF FINANCIAL INSTRUM

FAIR VALUE OF FINANCIAL INSTRUMENTS	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
FAIR VALUE OF FINANCIAL INSTRUMENTS	FAIR VALUE OF FINANCIAL INSTRUMENTS The following methods and assumptions were used to estimate the fair value of each of the following financial instruments: Preferred Stock, Long-Term Debt and Rate Reduction Bonds: The fair value of CL&P's and NSTAR Electric's preferred stock is based upon pricing models that incorporate interest rates and other market factors, valuations or trades of similar securities and cash flow projections. The fair value of long-term debt and RRB debt securities is based upon pricing models that incorporate quoted market prices for those issues or similar issues adjusted for market conditions, credit ratings of the respective companies and treasury benchmark yields. The fair values provided in the table below are classified as Level 2 within the fair value hierarchy. Carrying amounts and estimated fair values are as follows: Eversource CL&P NSTAR Electric PSNH (Millions of Dollars) Carrying Fair Carrying Fair Carrying Fair Carrying Fair As of June 30, 2022: Preferred Stock Not Subject to Mandatory Redemption $ 155.6 $ 146.9 $ 116.2 $ 107.2 $ 43.0 $ 39.7 $ — $ — Long-Term Debt 20,849.2 19,531.4 4,215.9 4,053.3 4,429.7 4,295.6 1,164.2 1,027.2 Rate Reduction Bonds 475.3 465.0 — — — — 475.3 465.0 As of December 31, 2021: Preferred Stock Not Subject to Mandatory Redemption $ 155.6 $ 166.3 $ 116.2 $ 122.3 $ 43.0 $ 44.0 $ — $ — Long-Term Debt 18,216.7 19,636.3 4,215.4 4,848.9 3,985.4 4,453.5 1,163.8 1,220.6 Rate Reduction Bonds 496.9 543.3 — — — — 496.9 543.3 Derivative Instruments and Marketable Securities: Derivative instruments and investments in marketable securities are carried at fair value. For further information, see Note 4, "Derivative Instruments," and Note 5, "Marketable Securities," to the financial statements. See Note 1C, "Summary of Significant Accounting Policies – Fair Value Measurements," for the fair value measurement policy and the fair value hierarchy.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)	ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) The changes in accumulated other comprehensive income/(loss) by component, net of tax, are as follows: For the Six Months Ended June 30, 2022 For the Six Months Ended June 30, 2021 Eversource (Millions of Dollars) Qualified Unrealized Defined Total Qualified Unrealized Defined Total Balance as of Beginning of Period $ (0.4) $ 0.4 $ (42.3) $ (42.3) $ (1.4) $ 1.1 $ (76.1) $ (76.4) OCI Before Reclassifications — (1.3) (2.5) (3.8) — (0.5) (2.4) (2.9) Amounts Reclassified from AOCI — — 3.2 3.2 0.9 — 4.1 5.0 Net OCI — (1.3) 0.7 (0.6) 0.9 (0.5) 1.7 2.1 Balance as of End of Period $ (0.4) $ (0.9) $ (41.6) $ (42.9) $ (0.5) $ 0.6 $ (74.4) $ (74.3) Defined benefit plan OCI amounts before reclassifications relate to actuarial gains and losses that arose during the year and were recognized in AOCI. The unamortized actuarial gains and losses and prior service costs on the defined benefit plans are amortized from AOCI into Other Income, Net over the average future employee service period, and are reflected in amounts reclassified from AOCI.

COMMON SHARES

COMMON SHARES	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
COMMON SHARES	COMMON SHARES The following table sets forth the Eversource parent common shares and the shares of common stock of CL&P, NSTAR Electric and PSNH that were authorized and issued, as well as the respective per share par values: Shares Authorized as of June 30, 2022 and December 31, 2021 Issued as of Par Value June 30, 2022 December 31, 2021 Eversource $ 5 380,000,000 359,211,206 357,818,402 CL&P $ 10 24,500,000 6,035,205 6,035,205 NSTAR Electric $ 1 100,000,000 200 200 PSNH $ 1 100,000,000 301 301 Common Share Issuances and 2022 Equity Distribution Agreement: On May 11, 2022, Eversource entered into an equity distribution agreement pursuant to which it may offer and sell up to $1.2 billion of its common shares from time to time through an “at-the-market” (ATM) equity offering program. Eversource may issue and sell its common shares through its sales agents during the term of this agreement. Shares may be offered in transactions on the New York Stock Exchange, in the over-the-counter market, through negotiated transactions or otherwise. Sales may be made at either market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. During the second quarter of 2022, Eversource issued 1,392,804 common shares, which resulted in proceeds of $126.3 million, net of issuance costs. Eversource used the net proceeds received for general corporate purposes. Treasury Shares: As of June 30, 2022 and December 31, 2021, there were 12,800,177 and 13,415,206 Eversource common shares held as treasury shares, respectively. As of June 30, 2022 and December 31, 2021, there we re 346,411,029 and 344,403,196 Eversource common shares outstanding, respectively.

COMMON SHAREHOLDERS' EQUITY AND

COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS	COMMON SHARES The following table sets forth the Eversource parent common shares and the shares of common stock of CL&P, NSTAR Electric and PSNH that were authorized and issued, as well as the respective per share par values: Shares Authorized as of June 30, 2022 and December 31, 2021 Issued as of Par Value June 30, 2022 December 31, 2021 Eversource $ 5 380,000,000 359,211,206 357,818,402 CL&P $ 10 24,500,000 6,035,205 6,035,205 NSTAR Electric $ 1 100,000,000 200 200 PSNH $ 1 100,000,000 301 301 Common Share Issuances and 2022 Equity Distribution Agreement: On May 11, 2022, Eversource entered into an equity distribution agreement pursuant to which it may offer and sell up to $1.2 billion of its common shares from time to time through an “at-the-market” (ATM) equity offering program. Eversource may issue and sell its common shares through its sales agents during the term of this agreement. Shares may be offered in transactions on the New York Stock Exchange, in the over-the-counter market, through negotiated transactions or otherwise. Sales may be made at either market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. During the second quarter of 2022, Eversource issued 1,392,804 common shares, which resulted in proceeds of $126.3 million, net of issuance costs. Eversource used the net proceeds received for general corporate purposes. Treasury Shares: As of June 30, 2022 and December 31, 2021, there were 12,800,177 and 13,415,206 Eversource common shares held as treasury shares, respectively. As of June 30, 2022 and December 31, 2021, there we re 346,411,029 and 344,403,196 Eversource common shares outstanding, respectively.

EARNINGS PER SHARE

EARNINGS PER SHARE	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE Basic EPS is computed based upon the weighted average number of common shares outstanding during each period. Diluted EPS is computed on the basis of the weighted average number of common shares outstanding plus the potential dilutive effect of certain share-based compensation awards as if they were converted into outstanding common shares. The dilutive effect of unvested RSU and performance share awards is calculated using the treasury stock method. RSU and performance share awards are included in basic weighted average common shares outstanding as of the date that all necessary vesting conditions have been satisfied. For the three and six months ended June 30, 2022 and 2021, there were no antidilutive share awards excluded from the computation of diluted EPS. The following table sets forth the components of basic and diluted EPS: Eversource (Millions of Dollars, except share information) For the Three Months Ended For the Six Months Ended June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 Net Income Attributable to Common Shareholders $ 291.9 $ 264.5 $ 735.3 $ 630.7 Weighted Average Common Shares Outstanding: Basic 345,893,714 343,844,626 345,525,030 343,761,435 Dilutive Effect 401,764 591,070 453,276 623,758 Diluted 346,295,478 344,435,696 345,978,306 344,385,193 Basic and Diluted EPS $ 0.84 $ 0.77 $ 2.13 $ 1.83

REVENUES

REVENUES	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
REVENUES	REVENUES The following tables present operating revenues disaggregated by revenue source: For the Three Months Ended June 30, 2022 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,004.8 $ 218.5 $ — $ 35.3 $ — $ — $ 1,258.6 Commercial 664.1 122.6 — 16.7 — (1.4) 802.0 Industrial 88.9 43.5 — 1.1 — (5.1) 128.4 Total Retail Tariff Sales Revenues 1,757.8 384.6 — 53.1 — (6.5) 2,189.0 Wholesale Transmission Revenues — — 334.5 — 25.1 (266.4) 93.2 Wholesale Market Sales Revenues 212.6 33.2 — 0.9 — — 246.7 Other Revenues from Contracts with Customers 18.4 1.2 3.2 2.3 310.6 (309.8) 25.9 Amortization of/(Reserve for) Revenues Subject to Refund (1) 6.5 — 0.7 (0.4) — — 6.8 Total Revenues from Contracts with Customers 1,995.3 419.0 338.4 55.9 335.7 (582.7) 2,561.6 Alternative Revenue Programs 6.8 (3.0) 119.0 (1.4) — (113.2) 8.2 Other Revenues (2) 2.3 0.2 0.2 0.1 — — 2.8 Total Operating Revenues $ 2,004.4 $ 416.2 $ 457.6 $ 54.6 $ 335.7 $ (695.9) $ 2,572.6 For the Six Months Ended June 30, 2022 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 2,191.0 $ 775.3 $ — $ 63.4 $ — $ — $ 3,029.7 Commercial 1,325.5 380.1 — 31.3 — (2.5) 1,734.4 Industrial 178.5 111.6 — 2.2 — (9.6) 282.7 Total Retail Tariff Sales Revenues 3,695.0 1,267.0 — 96.9 — (12.1) 5,046.8 Wholesale Transmission Revenues — — 780.7 — 49.6 (631.1) 199.2 Wholesale Market Sales Revenues 578.1 66.7 — 1.7 — — 646.5 Other Revenues from Contracts with Customers 36.1 2.2 7.0 4.2 669.7 (662.9) 56.3 Amortization of/(Reserve for) Revenues Subject to Refund (1) 64.9 — 0.7 (0.7) — — 64.9 Total Revenues from Contracts with Customers 4,374.1 1,335.9 788.4 102.1 719.3 (1,306.1) 6,013.7 Alternative Revenue Programs 11.5 7.2 104.0 0.8 — (99.6) 23.9 Other Revenues (2) 5.1 0.7 0.4 0.2 — — 6.4 Total Operating Revenues $ 4,390.7 $ 1,343.8 $ 892.8 $ 103.1 $ 719.3 $ (1,405.7) $ 6,044.0 For the Three Months Ended June 30, 2021 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 882.1 $ 174.2 $ — $ 36.0 $ — $ — $ 1,092.3 Commercial 594.1 89.6 — 16.1 — (1.3) 698.5 Industrial 82.0 34.8 — 1.1 — (4.4) 113.5 Total Retail Tariff Sales Revenues 1,558.2 298.6 — 53.2 — (5.7) 1,904.3 Wholesale Transmission Revenues — — 416.9 — 20.3 (345.9) 91.3 Wholesale Market Sales Revenues 97.2 15.7 — 1.0 — — 113.9 Other Revenues from Contracts with Customers 25.1 1.0 3.4 1.2 309.7 (307.0) 33.4 Total Revenues from Contracts with Customers 1,680.5 315.3 420.3 55.4 330.0 (658.6) 2,142.9 Alternative Revenue Programs (4.8) (3.4) (9.3) (2.7) — (1.2) (21.4) Other Revenues (2) 0.8 (0.1) 0.2 0.1 — — 1.0 Total Operating Revenues $ 1,676.5 $ 311.8 $ 411.2 $ 52.8 $ 330.0 $ (659.8) $ 2,122.5 For the Six Months Ended June 30, 2021 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,948.1 $ 641.1 $ — $ 63.7 $ — $ — $ 2,652.9 Commercial 1,154.0 297.4 — 29.8 — (2.7) 1,478.5 Industrial 165.0 90.8 — 2.2 — (8.0) 250.0 Total Retail Tariff Sales Revenues 3,267.1 1,029.3 — 95.7 — (10.7) 4,381.4 Wholesale Transmission Revenues — — 811.2 — 39.5 (666.9) 183.8 Wholesale Market Sales Revenues 246.3 42.0 — 1.8 — — 290.1 Other Revenues from Contracts with Customers 43.4 2.4 6.8 2.4 633.5 (628.3) 60.2 Total Revenues from Contracts with Customers 3,556.8 1,073.7 818.0 99.9 673.0 (1,305.9) 4,915.5 Alternative Revenue Programs 18.2 18.6 (6.6) (0.9) — 1.0 30.3 Other Revenues (2) 1.9 — 0.5 0.2 — — 2.6 Total Operating Revenues $ 3,576.9 $ 1,092.3 $ 811.9 $ 99.2 $ 673.0 $ (1,304.9) $ 4,948.4 For the Three Months Ended June 30, 2022 For the Three Months Ended June 30, 2021 (Millions of Dollars) CL&P NSTAR Electric PSNH CL&P NSTAR Electric PSNH Revenues from Contracts with Customers Retail Tariff Sales Residential $ 526.1 $ 326.9 $ 151.8 $ 440.8 $ 304.7 $ 136.6 Commercial 255.3 327.8 81.7 215.7 296.1 82.8 Industrial 36.0 30.6 22.3 28.4 29.1 24.5 Total Retail Tariff Sales Revenues 817.4 685.3 255.8 684.9 629.9 243.9 Wholesale Transmission Revenues 115.8 163.6 55.1 195.7 160.1 61.1 Wholesale Market Sales Revenues 143.4 47.8 21.4 68.1 18.9 10.2 Other Revenues from Contracts with Customers 7.5 11.8 3.0 9.5 15.3 4.4 Amortization of Revenues Subject to Refund (1) 7.2 — — — — — Total Revenues from Contracts with Customers 1,091.3 908.5 335.3 958.2 824.2 319.6 Alternative Revenue Programs 92.2 14.3 19.3 (1.1) (15.3) 2.3 Other Revenues (2) 0.2 1.6 0.7 (0.2) 0.7 0.5 Eliminations (148.0) (140.7) (48.2) (127.3) (122.2) (43.6) Total Operating Revenues $ 1,035.7 $ 783.7 $ 307.1 $ 829.6 $ 687.4 $ 278.8 For the Six Months Ended June 30, 2022 For the Six Months Ended June 30, 2021 (Millions of Dollars) CL&P NSTAR Electric PSNH CL&P NSTAR Electric PSNH Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,125.2 $ 731.5 $ 334.3 $ 986.6 $ 667.1 $ 294.4 Commercial 497.5 659.1 170.1 429.9 564.4 160.6 Industrial 69.5 64.7 44.3 65.2 53.6 46.2 Total Retail Tariff Sales Revenues 1,692.2 1,455.3 548.7 1,481.7 1,285.1 501.2 Wholesale Transmission Revenues 325.0 328.8 126.9 384.6 307.2 119.4 Wholesale Market Sales Revenues 423.4 105.6 49.1 177.8 43.4 25.1 Other Revenues from Contracts with Customers 15.3 23.4 5.7 16.8 27.0 7.6 Amortization of Revenues Subject to Refund (1) 65.6 — — — — — Total Revenues from Contracts with Customers 2,521.5 1,913.1 730.4 2,060.9 1,662.7 653.3 Alternative Revenue Programs 93.4 6.1 16.0 7.8 (1.5) 5.3 Other Revenues (2) 0.3 3.6 1.6 0.1 1.8 0.5 Eliminations (293.7) (276.0) (101.5) (251.9) (238.6) (86.8) Total Operating Revenues $ 2,321.5 $ 1,646.8 $ 646.5 $ 1,816.9 $ 1,424.4 $ 572.3 (1) Amortization of Revenues Subject to Refund within the Electric Distribution segment in the second quarter and first half of 2022 represents customer credits being distributed to CL&P’s customers on retail electric bills as a result of the October 2021 CL&P settlement agreement and the 2021 civil penalty for non-compliance with storm performance standards. Total customer credits as a result of the 2021 settlement and civil penalty were $93.4 million. The settlement amount of $65 million was refunded over a two-month billing period from December 1, 2021 to January 31, 2022 and the civil penalty of $28.4 million is being refunded over a one year billing period, which began September 1, 2021. Other Revenues also include lease revenues under lessor accounting guidance

SEGMENT INFORMATION

SEGMENT INFORMATION	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION Eversource is organized into the Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution reportable segments and Other based on a combination of factors, including the characteristics of each segments' services, the sources of operating revenues and expenses and the regulatory environment in which each segment operates. These reportable segments represent substantially all of Eversource's total consolidated revenues. Revenues from the sale of electricity, natural gas and water primarily are derived from residential, commercial and industrial customers and are not dependent on any single customer. The Electric Distribution reportable segment includes the results of NSTAR Electric's solar power facilities. Eversource's reportable segments are determined based upon the level at which Eversource's chief operating decision maker assesses performance and makes decisions about the allocation of company resources. The remainder of Eversource's operations is presented as Other in the tables below and primarily consists of 1) the equity in earnings of Eversource parent from its subsidiaries and intercompany interest income, both of which are eliminated in consolidation, and interest expense related to the debt of Eversource parent, 2) the revenues and expenses of Eversource Service, most of which are eliminated in consolidation, 3) the operations of CYAPC and YAEC, 4) the results of other unregulated subsidiaries, which are not part of its core business, and 5) Eversource parent's equity ownership interests that are not consolidated, which primarily include the offshore wind business, a natural gas pipeline owned by Enbridge, Inc., and a renewable energy investment fund. In the ordinary course of business, Yankee Gas, NSTAR Gas and EGMA purchase natural gas transmission services from the Enbridge, Inc. natural gas pipeline project described above. These affiliate transaction costs total $77.7 million annually and are classified as Purchased Power, Fuel and Transmission on the Eversource statements of income. Each of Eversource's subsidiaries, including CL&P, NSTAR Electric and PSNH, has one reportable segment. Cash flows used for investments in plant included in the segment information below are cash capital expenditures that do not include amounts incurred but not paid, cost of removal, AFUDC related to equity funds, and the capitalized portions of pension and PBOP expense. Eversource's segment information is as follows: For the Three Months Ended June 30, 2022 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 2,004.4 $ 416.2 $ 457.6 $ 54.6 $ 335.7 $ (695.9) $ 2,572.6 Depreciation and Amortization (198.1) (39.1) (83.3) (12.5) (33.2) 1.6 (364.6) Other Operating Expenses (1,636.1) (360.7) (141.3) (27.0) (279.4) 692.1 (1,752.4) Operating Income $ 170.2 $ 16.4 $ 233.0 $ 15.1 $ 23.1 $ (2.2) $ 455.6 Interest Expense $ (60.3) $ (16.7) $ (37.5) $ (8.4) $ (53.5) $ 16.3 $ (160.1) Other Income, Net 53.0 10.6 9.3 2.1 354.3 (335.4) 93.9 Net Income Attributable to Common Shareholders 129.0 7.7 151.5 9.0 316.0 (321.3) 291.9 For the Six Months Ended June 30, 2022 Eversource (Millions of Dollars) Electric Distribution Natural Gas Distribution Electric Transmission Water Distribution Other Eliminations Total Operating Revenues $ 4,390.7 $ 1,343.8 $ 892.8 $ 103.1 $ 719.3 $ (1,405.7) $ 6,044.0 Depreciation and Amortization (549.7) (91.1) (165.3) (24.8) (63.4) 3.3 (891.0) Other Operating Expenses (3,481.7) (1,018.0) (270.5) (54.1) (610.9) 1,400.8 (4,034.4) Operating Income $ 359.3 $ 234.7 $ 457.0 $ 24.2 $ 45.0 $ (1.6) $ 1,118.6 Interest Expense $ (119.8) $ (32.5) $ (70.6) $ (16.5) $ (100.3) $ 26.4 $ (313.3) Other Income, Net 100.5 20.8 18.2 4.2 850.2 (828.5) 165.4 Net Income Attributable to Common Shareholders 269.9 171.7 300.0 12.7 784.7 (803.7) 735.3 Cash Flows Used for Investments in Plant 541.8 275.4 543.6 65.6 122.7 — 1,549.1 For the Three Months Ended June 30, 2021 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 1,676.5 $ 311.8 $ 411.2 $ 52.8 $ 330.0 $ (659.8) $ 2,122.5 Depreciation and Amortization (132.3) (34.6) (74.5) (11.5) (28.4) 1.1 (280.2) Other Operating Expenses (1,360.3) (257.7) (121.9) (25.4) (285.7) 660.3 (1,390.7) Operating Income $ 183.9 $ 19.5 $ 214.8 $ 15.9 $ 15.9 $ 1.6 $ 451.6 Interest Expense $ (61.1) $ (14.6) $ (32.6) $ (8.1) $ (41.8) $ 12.8 $ (145.4) Other Income, Net 29.9 4.6 6.8 0.9 309.2 (304.8) 46.6 Net Income Attributable to Common Shareholders 121.6 4.1 137.6 8.9 282.7 (290.4) 264.5 For the Six Months Ended June 30, 2021 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 3,576.9 $ 1,092.3 $ 811.9 $ 99.2 $ 673.0 $ (1,304.9) $ 4,948.4 Depreciation and Amortization (354.3) (80.3) (148.0) (22.8) (55.7) 2.1 (659.0) Other Operating Expenses (2,890.8) (793.6) (237.3) (50.5) (585.2) 1,305.2 (3,252.2) Operating Income $ 331.8 $ 218.4 $ 426.6 $ 25.9 $ 32.1 $ 2.4 $ 1,037.2 Interest Expense $ (114.4) $ (28.5) $ (65.3) $ (16.0) $ (83.4) $ 24.4 $ (283.2) Other Income, Net 50.6 8.5 12.2 1.9 733.4 (725.8) 80.8 Net Income Attributable to Common Shareholders 214.9 151.6 273.0 12.6 677.6 (699.0) 630.7 Cash Flows Used for Investments in Plant 510.4 305.9 443.2 53.8 109.9 — 1,423.2 The following table summarizes Eversource's segmented total assets: Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total As of June 30, 2022 $ 26,238.1 $ 7,351.4 $ 12,938.6 $ 2,592.4 $ 23,833.9 $ (23,038.2) $ 49,916.2 As of December 31, 2021 25,411.2 7,215.9 12,377.8 2,551.1 22,674.7 (21,738.6) 48,492.1

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Eversource Energy is a public utility holding company primarily engaged, through its wholly-owned regulated utility subsidiaries, in the energy delivery business. Eversource Energy's wholly-owned regulated utility subsidiaries consist of CL&P, NSTAR Electric and PSNH (electric utilities), Yankee Gas, NSTAR Gas and Eversource Gas Company of Massachusetts (EGMA) (natural gas utilities), and Aquarion (water utilities). Eversource provides energy delivery and/or water service to approximately 4.4 million electric, natural gas and water customers through ten regulated utilities in Connecticut, Massachusetts and New Hampshire. The unaudited condensed consolidated financial statements of Eversource, NSTAR Electric and PSNH include the accounts of each of their respective subsidiaries. Intercompany transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements of Eversource, NSTAR Electric and PSNH and the unaudited condensed financial statements of CL&P are herein collectively referred to as the "financial statements." The combined notes to the financial statements have been prepared pursuant to the rules and regulations of the SEC. Certain information and footnote disclosures included in annual financial statements prepared in accordance with GAAP have been omitted pursuant to such rules and regulations. The accompanying financial statements should be read in conjunction with the Combined Notes to Financial Statements included in Item 8, "Financial Statements and Supplementary Data," of the Eversource 2021 Form 10-K, which was filed with the SEC on February 17, 2022. The preparation of the financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. The financial statements contain, in the opinion of management, all adjustments (including normal, recurring adjustments) necessary to present fairly Eversource's, CL&P's, NSTAR Electric's and PSNH's financial position as of June 30, 2022 and December 31, 2021, and the results of operations, comprehensive income and common shareholders' equity for the three and six months ended June 30, 2022 and 2021 and the cash flows for the six months ended June 30, 2022 and 2021. The results of operations and comprehensive income for the three and six months ended June 30, 2022 and 2021 and the cash flows for the six months ended June 30, 2022 and 2021 are not necessarily indicative of the results expected for a full year. CYAPC and YAEC are inactive regional nuclear power companies engaged in the long-term storage of their spent nuclear fuel. Eversource consolidates the operations of CYAPC and YAEC because CL&P's, NSTAR Electric's and PSNH's combined ownership and voting interests in each of these entities is greater than 50 percent. Intercompany transactions between CL&P, NSTAR Electric, PSNH and the CYAPC and YAEC companies have been eliminated in consolidation of the Eversource financial statements. Eversource holds several equity ownership interests that are not consolidated and are accounted for under the equity method. Eversource's utility subsidiaries' electric, natural gas and water distribution and transmission businesses are subject to rate-regulation that is based on cost recovery and meets the criteria for application of accounting guidance for entities with rate-regulated operations, which considers the effect of regulation on the differences in the timing of the recognition of certain revenues and expenses from those of other businesses and industries. See Note 2, "Regulatory Accounting," for further information. Certain reclassifications of prior period data were made in the accompanying financial statements to conform to the current period presentation.
Allowance for Uncollectible Accounts	Allowance for Uncollectible Accounts Receivables, Net on the balance sheets primarily includes trade receivables from retail customers and customers related to wholesale transmission contracts, wholesale market sales, sales of RECs, and property rentals. Receivables, Net also includes customer receivables for the purchase of electricity from a competitive third party supplier, the current portion of customer energy efficiency loans, property damage receivables and other miscellaneous receivables. There is no material concentration of receivables. Receivables are recorded at amortized cost, net of a credit loss provision (or allowance for uncollectible accounts). Receivables are presented net of expected credit losses at estimated net realizable value by maintaining an allowance for uncollectible accounts. The current expected credit loss (CECL) model is applied to receivables for purposes of calculating the allowance for uncollectible accounts. This model is based on expected losses and results in the recognition of estimated expected credit losses, including uncollectible amounts for both billed and unbilled revenues, over the life of the receivable at the time a receivable is recorded. The allowance for uncollectible accounts is determined based upon a variety of judgments and factors, including an aging-based quantitative assessment that applies an estimated uncollectible percentage to each receivable aging category. Factors in determining credit loss include historical collection, write-off experience, analysis of delinquency statistics, and management's assessment of collectability from customers, including current conditions, customer payment trends, the impact on customer bills because of energy usage trends and changes in rates, flexible payment plans and financial hardship arrearage management programs being offered to customers, reasonable forecasts, and expectations of future collectability and collection efforts. Management continuously assesses the collectability of receivables and adjusts estimates based on actual experience and future expectations based on economic conditions, collection efforts and other factors. Management also monitors the aging analysis of receivables to determine if there are changes in the collections of accounts receivable. Receivable balances are written off against the allowance for uncollectible accounts when the customer accounts are no longer in service and these balances are deemed to be uncollectible. Management concluded that the reserve balance as of June 30, 2022 adequately reflected the collection risk and net realizable value for its receivables. As of June 30, 2022 and December 31, 2021, the total amount incurred as a result of COVID-19 included in the allowance for uncollectible accounts was $63.1 million and $55.3 million at Eversource, $20.4 million and $23.9 million at CL&P, and $7.5 million and $9.0 million at NSTAR Electric, respectively. At our Connecticut and Massachusetts utilities, the COVID-19 related uncollectible amounts were deferred either as incremental regulatory costs or deferred through existing regulatory tracking mechanisms that recover uncollectible energy supply costs, as management believes it is probable that these costs will ultimately be recovered from customers in future rates. No COVID-19 related uncollectible amounts were deferred at PSNH as a result of a July 2021 NHPUC order. Based on the status of our COVID-19 regulatory dockets, policies and practices in the jurisdictions in which we operate, we believe the state regulatory commissions in Connecticut and Massachusetts will allow us to recover our incremental uncollectible customer receivable costs associated with COVID-19. The PURA allows CL&P and Yankee Gas to accelerate the recovery of accounts receivable balances attributable to qualified customers under financial or medical duress (uncollectible hardship accounts receivable) outstanding for greater than 180 days and 90 days, respectively. The DPU allows NSTAR Electric, NSTAR Gas and EGMA to recover in rates amounts associated with certain uncollectible hardship accounts receivable. These uncollectible hardship customer account balances are included in Regulatory Assets or Other Long-Term Assets on the balance sheets. Hardship customers are protected from shut-off in certain circumstances, and historical collection experience has reflected a higher default risk as compared to the rest of the receivable population. Management uses a higher credit risk profile for this pool of trade receivables as compared to non-hardship receivables. The allowance for uncollectible hardship accounts is included in the total uncollectible allowance balance.
Fair Value Measurements	Fair Value Measurements Fair value measurement guidance is applied to derivative contracts that are not elected or designated as "normal purchases" or "normal sales" (normal) and to the marketable securities held in trusts. Fair value measurement guidance is also applied to valuations of the investments used to calculate the funded status of pension and PBOP plans, the nonrecurring fair value measurements of nonfinancial assets such as goodwill, long-lived assets, equity method investments, AROs, and in the valuation of acquisitions. The fair value measurement guidance was also applied in estimating the fair value of preferred stock, long-term debt and RRBs. Fair Value Hierarchy: In measuring fair value, Eversource uses observable market data when available in order to minimize the use of unobservable inputs. Inputs used in fair value measurements are categorized into three fair value hierarchy levels for disclosure purposes. The entire fair value measurement is categorized based on the lowest level of input that is significant to the fair value measurement. Eversource evaluates the classification of assets and liabilities measured at fair value on a quarterly basis. The levels of the fair value hierarchy are described below: Level 1 - Inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 - Inputs are quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations in which all significant inputs are observable. Level 3 - Quoted market prices are not available. Fair value is derived from valuation techniques in which one or more significant inputs or assumptions are unobservable. Where possible, valuation techniques incorporate observable market inputs that can be validated to external sources such as industry exchanges, including prices of energy and energy-related products. Uncategorized - Investments that are measured at net asset value are not categorized within the fair value hierarchy.
Other Taxes	Other TaxesEversource's companies that serve customers in Connecticut collect gross receipts taxes levied by the state of Connecticut from their customers. These gross receipts taxes are recorded separately with collections in Operating Revenues and with payments in Taxes Other Than Income Taxes on the statements of incomeAs agents for state and local governments, Eversource's companies that serve customers in Connecticut and Massachusetts collect certain sales taxes that are recorded on a net basis with no impact on the statements of income.

SUMMARY OF SIGNIFICANT ACCOUN_3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Allowance for Uncollectible Accounts	The activity in the allowance for uncollectible accounts by portfolio segment as of June 30 th is as follows: Eversource CL&P NSTAR Electric PSNH (Millions of Dollars) Hardship Accounts Retail (Non-Hardship), Total Allowance Hardship Accounts Retail (Non-Hardship), Total Allowance Hardship Accounts Retail (Non-Hardship), Total Allowance Total Allowance Three Months Ended 2022 Beginning Balance $ 225.5 $ 206.7 $ 432.2 $ 140.1 $ 40.4 $ 180.5 $ 39.7 $ 55.1 $ 94.8 $ 26.2 Uncollectible Expense — 12.9 12.9 — 2.9 2.9 — 4.0 4.0 2.0 Uncollectible Costs Deferred (1) 21.4 12.6 34.0 15.0 2.2 17.2 5.4 2.4 7.8 0.1 Write-Offs (4.6) (21.1) (25.7) (3.3) (6.2) (9.5) (0.1) (7.7) (7.8) (1.3) Recoveries Collected 0.4 4.0 4.4 0.3 1.3 1.6 — 1.7 1.7 0.3 Ending Balance $ 242.7 $ 215.1 $ 457.8 $ 152.1 $ 40.6 $ 192.7 $ 45.0 $ 55.5 $ 100.5 $ 27.3 Six Months Ended 2022 Beginning Balance $ 226.1 $ 191.3 $ 417.4 $ 144.6 $ 36.7 $ 181.3 $ 43.3 $ 53.7 $ 97.0 $ 24.3 Uncollectible Expense — 30.0 30.0 — 6.7 6.7 — 8.7 8.7 4.5 Uncollectible Costs Deferred (1) 22.4 27.3 49.7 11.0 — 11.0 2.1 7.8 9.9 1.1 Write-Offs (6.9) (43.1) (50.0) (4.4) (6.7) (11.1) (0.4) (18.3) (18.7) (3.1) Recoveries Collected 1.1 9.6 10.7 0.9 3.9 4.8 — 3.6 3.6 0.5 Ending Balance $ 242.7 $ 215.1 $ 457.8 $ 152.1 $ 40.6 $ 192.7 $ 45.0 $ 55.5 $ 100.5 $ 27.3 Eversource CL&P NSTAR Electric PSNH (Millions of Dollars) Hardship Accounts Retail (Non-Hardship), Total Allowance Hardship Accounts Retail (Non-Hardship), Total Allowance Hardship Accounts Retail (Non-Hardship), Total Allowance Total Allowance Three Months Ended 2021 Beginning Balance $ 197.3 $ 194.4 $ 391.7 $ 138.4 $ 36.7 $ 175.1 $ 31.1 $ 58.2 $ 89.3 $ 17.3 Uncollectible Expense — 11.4 11.4 — 2.8 2.8 — 3.5 3.5 2.0 Uncollectible Costs Deferred (1) 16.6 24.5 41.1 9.3 8.3 17.6 4.9 6.9 11.8 (0.3) Write-Offs (3.4) (18.1) (21.5) (2.3) (5.4) (7.7) (0.1) (7.7) (7.8) (2.0) Recoveries Collected 0.2 2.9 3.1 0.2 0.8 1.0 — 1.2 1.2 0.2 Ending Balance $ 210.7 $ 215.1 $ 425.8 $ 145.6 $ 43.2 $ 188.8 $ 35.9 $ 62.1 $ 98.0 $ 17.2 Six Months Ended 2021 Beginning Balance $ 194.8 $ 164.1 $ 358.9 $ 129.1 $ 28.3 $ 157.4 $ 39.7 $ 51.9 $ 91.6 $ 17.2 Uncollectible Expense — 27.7 27.7 — 6.6 6.6 — 7.4 7.4 3.2 Uncollectible Costs Deferred (1) 22.0 51.6 73.6 21.2 15.7 36.9 (3.5) 15.2 11.7 0.8 Write-Offs (6.7) (34.8) (41.5) (5.2) (9.3) (14.5) (0.3) (15.2) (15.5) (4.5) Recoveries Collected 0.6 6.5 7.1 0.5 1.9 2.4 — 2.8 2.8 0.5 Ending Balance $ 210.7 $ 215.1 $ 425.8 $ 145.6 $ 43.2 $ 188.8 $ 35.9 $ 62.1 $ 98.0 $ 17.2 (1) These expected credit losses are deferred as regulatory costs on the balance sheets, as these amounts are ultimately recovered in rates. Amounts include uncollectible costs for hardship accounts and other customer receivables, including uncollectible amounts related to uncollectible energy supply costs and COVID-19.
Components of Other Income, Net	The components of Other Income, Net on the statements of income were as follows: For the Three Months Ended June 30, 2022 June 30, 2021 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Pension, SERP and PBOP Non-Service $ 54.9 $ 16.2 $ 21.4 $ 6.7 $ 22.1 $ 4.3 $ 10.2 $ 2.7 AFUDC Equity 11.2 2.8 6.1 0.6 9.2 1.7 6.2 0.3 Equity in Earnings of Unconsolidated Affiliates (1) 16.6 — 0.1 — 4.7 — 0.1 — Investment Income/(Loss) 1.3 (0.7) 0.5 0.1 1.9 1.2 0.6 0.3 Interest Income 9.5 1.5 6.1 0.4 8.4 2.7 4.8 0.9 Other 0.4 — 0.1 — 0.3 — — 0.1 Total Other Income, Net $ 93.9 $ 19.8 $ 34.3 $ 7.8 $ 46.6 $ 9.9 $ 21.9 $ 4.3 For the Six Months Ended June 30, 2022 June 30, 2021 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Pension, SERP and PBOP Non-Service $ 109.2 $ 32.1 $ 42.4 $ 13.3 $ 42.2 $ 7.0 $ 20.2 $ 5.4 AFUDC Equity 21.1 5.6 11.0 1.0 18.4 3.4 12.4 0.9 Equity in Earnings of Unconsolidated Affiliates (1) 17.1 — 0.1 — 8.4 — 0.2 — Investment Income/(Loss) 1.1 (1.1) 0.2 0.3 1.3 1.5 0.8 0.4 Interest Income 16.1 2.8 9.6 0.7 9.9 2.8 4.9 1.6 Other 0.8 — 0.2 — 0.6 0.1 0.2 0.1 Total Other Income, Net $ 165.4 $ 39.4 $ 63.5 $ 15.3 $ 80.8 $ 14.8 $ 38.7 $ 8.4 (1) Equity in earnings of unconsolidated affiliates includes $12.2 million of pre-tax unrealized gains associated with an investment in a renewable energy fund for the three and six months ended June 30, 2022. For the three and six months ended June 30, 2021, equity in earnings of unconsolidated affiliates included $2.1 million of pre-tax unrealized gains associated with this investment.
Investments in Unconsolidated Affiliates	Eversource's investments included the following: (Millions of Dollars) Ownership Interest As of June 30, 2022 As of December 31, 2021 Offshore Wind Business - North East Offshore 50 % $ 1,487.1 $ 1,213.6 Natural Gas Pipeline - Algonquin Gas Transmission, LLC 15 % 119.3 121.9 Renewable Energy Investment Fund 90 % 88.4 76.5 Other various 25.1 24.3 Total Investments in Unconsolidated Affiliates $ 1,719.9 $ 1,436.3 Offshore Wind Business: Eversource’s offshore wind business includes a 50 percent ownership interest in North East Offshore, which holds PPAs and contracts for the Revolution Wind, South Fork Wind and Sunrise Wind projects, as well as an undeveloped offshore lease area. The offshore wind investment includes capital expenditures for the three offshore wind projects, as well as capitalized costs related to future development, acquisition costs of offshore lease areas, and capitalized interest. Cash flows used in investing activities presented in Investments in Unconsolidated Affiliates, Net on the statements of cash flows relates to capital contributions in the offshore wind investment.
Other Taxes	These gross receipts taxes are recorded separately with collections in Operating Revenues and with payments in Taxes Other Than Income Taxes on the statements of income as follows: For the Three Months Ended For the Six Months Ended (Millions of Dollars) June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 Eversource $ 44.5 $ 39.9 $ 93.1 $ 88.5 CL&P 39.0 35.4 76.8 74.6
Non-cash Investing Activities	Non-cash investing activities include plant additions included in Accounts Payable as follows: (Millions of Dollars) As of June 30, 2022 As of June 30, 2021 Eversource $ 357.2 $ 344.8 CL&P 96.7 66.4 NSTAR Electric 75.1 103.8 PSNH 49.6 33.9
Reconciliation of Cash Balances to Cash and Restricted Cash	The following table reconciles cash as reported on the balance sheets to the cash and restricted cash balance as reported on the statements of cash flows: As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Cash as reported on the Balance Sheets $ 29.5 $ 9.2 $ 5.3 $ 0.1 $ 66.8 $ 55.8 $ 0.7 $ — Restricted cash included in: Special Deposits 90.8 8.7 17.4 30.9 78.2 18.7 17.4 31.4 Marketable Securities 17.2 — — 0.1 31.3 0.3 0.1 0.5 Other Long-Term Assets 19.2 — — 3.2 44.7 — — 3.2 Cash and Restricted Cash as reported on the Statements of Cash Flows $ 156.7 $ 17.9 $ 22.7 $ 34.3 $ 221.0 $ 74.8 $ 18.2 $ 35.1

REGULATORY ACCOUNTING (Tables)

REGULATORY ACCOUNTING (Tables)	6 Months Ended
	Jun. 30, 2022
Regulated Operations [Abstract]
Components of Regulatory Assets	The components of regulatory assets were as follows: As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Benefit Costs $ 1,435.0 $ 267.6 $ 397.2 $ 116.7 $ 1,481.0 $ 272.4 $ 395.5 $ 118.9 Storm Costs, Net 1,250.1 733.8 455.0 61.3 1,102.7 695.6 341.3 65.8 Regulatory Tracking Mechanisms 979.0 306.1 368.7 68.3 1,050.5 333.6 376.6 85.4 Income Taxes, Net 798.0 476.6 113.6 13.9 790.7 470.5 112.6 17.5 Securitized Stranded Costs 457.3 — — 457.3 478.9 — — 478.9 Goodwill-related 289.4 — 248.4 — 297.8 — 255.7 — Derivative Liabilities 213.3 213.3 — — 249.2 249.2 — — Asset Retirement Obligations 121.0 34.7 64.1 4.2 115.0 33.6 59.8 4.1 Other Regulatory Assets 189.5 28.1 33.5 15.2 150.0 29.9 37.7 15.8 Total Regulatory Assets 5,732.6 2,060.2 1,680.5 736.9 5,715.8 2,084.8 1,579.2 786.4 Less: Current Portion 1,163.4 396.4 419.7 93.2 1,129.1 371.6 444.0 107.2 Total Long-Term Regulatory Assets $ 4,569.2 $ 1,663.8 $ 1,260.8 $ 643.7 $ 4,586.7 $ 1,713.2 $ 1,135.2 $ 679.2
Components of Regulatory Liabilities	The components of regulatory liabilities were as follows: As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH EDIT due to Tax Cuts and Jobs Act of 2017 $ 2,646.1 $ 989.4 $ 962.1 $ 353.0 $ 2,685.2 $ 996.1 $ 984.5 $ 359.2 Cost of Removal 653.9 113.6 395.0 19.0 649.6 100.1 381.0 17.2 Regulatory Tracking Mechanisms 701.9 319.4 232.7 99.8 448.4 182.0 185.1 107.0 Deferred Portion of Non-Service Income 209.7 23.3 115.2 21.8 148.3 12.0 90.7 14.9 Benefit Costs 116.0 — 92.4 — 133.5 — 107.4 — AFUDC - Transmission 88.9 44.9 44.0 — 81.0 43.2 37.8 — CL&P Settlement Agreement and Storm 6.4 6.4 — — 81.3 81.3 — — Other Regulatory Liabilities 223.7 57.9 4.4 6.7 241.4 45.1 0.8 3.3 Total Regulatory Liabilities 4,646.6 1,554.9 1,845.8 500.3 4,468.7 1,459.8 1,787.3 501.6 Less: Current Portion 759.7 337.2 274.1 106.6 602.4 266.5 228.2 120.2 Total Long-Term Regulatory Liabilities $ 3,886.9 $ 1,217.7 $ 1,571.7 $ 393.7 $ 3,866.3 $ 1,193.3 $ 1,559.1 $ 381.4

PROPERTY, PLANT AND EQUIPMENT_2

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION (Tables)	6 Months Ended
	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Summary of Property, Plant, and Equipment	The following tables summarize property, plant and equipment by asset category: Eversource As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) Distribution - Electric $ 18,001.8 $ 17,679.1 Distribution - Natural Gas 6,819.5 6,694.8 Transmission - Electric 13,229.5 12,882.4 Distribution - Water 1,940.2 1,900.9 Solar 200.9 200.9 Utility 40,191.9 39,358.1 Other (1) 1,630.1 1,469.5 Property, Plant and Equipment, Gross 41,822.0 40,827.6 Less: Accumulated Depreciation Utility (9,046.9) (8,885.2) Other (640.1) (580.1) Total Accumulated Depreciation (9,687.0) (9,465.3) Property, Plant and Equipment, Net 32,135.0 31,362.3 Construction Work in Progress 2,272.2 2,015.4 Total Property, Plant and Equipment, Net $ 34,407.2 $ 33,377.7 As of June 30, 2022 As of December 31, 2021 (Millions of Dollars) CL&P NSTAR PSNH CL&P NSTAR PSNH Distribution - Electric $ 7,252.7 $ 8,265.0 $ 2,524.4 $ 7,117.6 $ 8,105.5 $ 2,496.2 Transmission - Electric 5,986.3 5,207.0 2,037.9 5,859.0 5,090.5 1,934.6 Solar — 200.9 — — 200.9 — Property, Plant and Equipment, Gross 13,239.0 13,672.9 4,562.3 12,976.6 13,396.9 4,430.8 Less: Accumulated Depreciation (2,589.2) (3,311.0) (911.9) (2,572.1) (3,227.3) (908.4) Property, Plant and Equipment, Net 10,649.8 10,361.9 3,650.4 10,404.5 10,169.6 3,522.4 Construction Work in Progress 441.2 787.5 169.8 399.0 707.0 134.1 Total Property, Plant and Equipment, Net $ 11,091.0 $ 11,149.4 $ 3,820.2 $ 10,803.5 $ 10,876.6 $ 3,656.5 (1) These assets are primarily comprised of computer software, hardware and equipment at Eversource Service and buildings at The Rocky River Realty Company.

DERIVATIVE INSTRUMENTS (Tables)

DERIVATIVE INSTRUMENTS (Tables)	6 Months Ended
	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Fair Values and Net Amounts of Contracts	The following table presents the gross fair values of contracts, categorized by risk type, and the net amounts recorded as current or long-term derivative assets or liabilities: As of June 30, 2022 As of December 31, 2021 CL&P (Millions of Dollars) Fair Value Hierarchy Commodity Supply and Price Risk Netting (1) Net Amount Commodity Supply and Price Risk Netting (1) Net Amount Current Derivative Assets Level 3 $ 15.2 $ (0.5) $ 14.7 $ 14.7 $ (1.0) $ 13.7 Long-Term Derivative Assets Level 3 37.7 (1.1) 36.6 46.9 (0.9) 46.0 Current Derivative Liabilities Level 3 (75.9) — (75.9) (73.5) — (73.5) Long-Term Derivative Liabilities Level 3 (188.7) — (188.7) (235.4) — (235.4) (1) Amounts represent derivative assets and liabilities that Eversource elected to record net on the balance sheets. These amounts are subject to master netting agreements or similar agreements for which the right of offset exists.
Summary of Level 3 Derivative Contracts and Significant Unobservable Inputs Used	The following is a summary of the significant unobservable inputs utilized in the valuations of the derivative contracts classified as Level 3: As of June 30, 2022 As of December 31, 2021 CL&P Range Average Period Covered Range Average Period Covered Forward Reserve Prices $ 0.50 — $0.50 $ 0.50 per kW-Month 2022 - 2024 $ 0.50 — $1.15 $ 0.82 per kW-Month 2022 - 2024
Changes in the Level 3 Category of Derivative Assets Measured at Fair Value on a Recurring Basis	The following table presents changes in the Level 3 category of derivative assets and derivative liabilities measured at fair value on a recurring basis. The derivative assets and liabilities are presented on a net basis. CL&P For the Three Months Ended June 30, For the Six Months Ended June 30, (Millions of Dollars) 2022 2021 2022 2021 Derivatives, Net: Fair Value as of Beginning of Period $ (229.4) $ (293.1) $ (249.2) $ (293.1) Net Realized/Unrealized Gains/(Losses) Included in Regulatory Assets 2.6 0.9 8.8 (11.5) Settlements 13.5 12.5 27.1 24.9 Fair Value as of End of Period $ (213.3) $ (279.7) $ (213.3) $ (279.7)

MARKETABLE SECURITIES (Tables)

MARKETABLE SECURITIES (Tables)	6 Months Ended
	Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Summary of Available-for-Sale Debt Securities	The following is a summary of the available-for-sale debt securities: As of June 30, 2022 As of December 31, 2021 Eversource (Millions of Dollars) Amortized Cost Pre-Tax Pre-Tax Fair Value Amortized Cost Pre-Tax Pre-Tax Fair Value Debt Securities $ 207.9 $ 0.5 $ (12.3) $ 196.1 $ 214.5 $ 5.1 $ (0.2) $ 219.4
Contractual Maturities of Available-for-Sale Debt Securities	As of June 30, 2022, the contractual maturities of available-for-sale debt securities were as follows: Eversource (Millions of Dollars) Amortized Cost Fair Value Less than one year (1) $ 18.5 $ 18.4 One to five years 57.6 56.7 Six to ten years 41.2 38.0 Greater than ten years 90.6 83.0 Total Debt Securities $ 207.9 $ 196.1 (1) Amounts in the Less than one year category include securities in the CYAPC and YAEC spent nuclear fuel trusts, which are restricted and are classified in long-term Marketable Securities on the balance sheets.
Marketable Securities Recorded at Fair Value on a Recurring Basis by Level	The following table presents the marketable securities recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy: Eversource (Millions of Dollars) As of June 30, 2022 As of December 31, 2021 Level 1: Mutual Funds and Equities $ 208.8 $ 254.2 Money Market Funds 17.2 31.3 Total Level 1 $ 226.0 $ 285.5 Level 2: U.S. Government Issued Debt Securities (Agency and Treasury) $ 84.2 $ 81.3 Corporate Debt Securities 54.9 65.3 Asset-Backed Debt Securities 9.6 12.6 Municipal Bonds 13.8 12.3 Other Fixed Income Securities 16.4 16.6 Total Level 2 $ 178.9 $ 188.1 Total Marketable Securities $ 404.9 $ 473.6

SHORT-TERM AND LONG-TERM DEBT (

SHORT-TERM AND LONG-TERM DEBT (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Borrowings Outstanding and Available under the Commercial Paper Programs	The amount of borrowings outstanding and available under the commercial paper programs were as follows: Borrowings Outstanding as of Available Borrowing Capacity as of Weighted-Average Interest Rate as of June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 June 30, 2022 December 31, 2021 (Millions of Dollars) Eversource Parent Commercial Paper Program $ 124.5 $ 1,343.0 $ 1,875.5 $ 657.0 1.81 % 0.31 % NSTAR Electric Commercial Paper Program 63.0 162.5 587.0 487.5 1.63 % 0.14 %
Summary of Long-Term Debt Issuance and Repayments	The following table summarizes long-term debt issuances and repayments: (Millions of Dollars) Issuance/(Repayment) Issue Date or Repayment Date Maturity Date Use of Proceeds for Issuance/ NSTAR Electric: 4.55% 2022 Debentures $ 450.0 May 2022 June 2052 Repaid short-term debt, paid capital expenditures and working capital Other: Eversource Parent 2.90% Series V Senior Notes 650.0 February 2022 March 2027 Repaid Series K Senior Notes at maturity and short-term debt Eversource Parent 3.38% Series W Senior Notes 650.0 February 2022 March 2032 Repaid Series K Senior Notes at maturity and short-term debt Eversource Parent 4.20% Series X Senior Notes 900.0 June 2022 June 2024 Repaid short-term debt and paid working capital Eversource Parent 4.60% Series Y Senior Notes 600.0 June 2022 July 2027 Repaid short-term debt and paid working capital Eversource Parent 2.75% Series K Senior Notes (750.0) March 2022 March 2022 Paid at maturity Yankee Gas 8.48% Series B First Mortgage Bonds (20.0) March 2022 March 2022 Paid at maturity EGMA 4.70% Series C First Mortgage Bonds 100.0 June 2022 June 2052 Repaid short-term debt, paid capital expenditures and for general corporate purposes NSTAR Gas 4.40% Series V First Mortgage Bonds 125.0 July 2022 August 2032 Repaid short-term debt, paid capital expenditures and for general corporate purposes

RATE REDUCTION BONDS AND VARI_2

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES (Tables)	6 Months Ended
	Jun. 30, 2022
Rate Reduction Bonds and Variable Interest Entity [Abstract]
Summary of the Impact of Funding on the Balance Sheets and Income Statements	The following tables summarize the impact of PSNH Funding on PSNH's balance sheets and income statements: (Millions of Dollars) PSNH Balance Sheets: As of June 30, 2022 As of December 31, 2021 Restricted Cash - Current Portion (included in Current Assets) $ 30.7 $ 31.1 Restricted Cash - Long-Term Portion (included in Other Long-Term Assets) 3.2 3.2 Securitized Stranded Cost (included in Regulatory Assets) 457.3 478.9 Other Regulatory Liabilities (included in Regulatory Liabilities) 5.2 5.4 Accrued Interest (included in Other Current Liabilities) 7.2 7.5 Rate Reduction Bonds - Current Portion 43.2 43.2 Rate Reduction Bonds - Long-Term Portion 432.1 453.7 (Millions of Dollars) PSNH Income Statements: For the Three Months Ended For the Six Months Ended June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net) $ 10.8 $ 10.8 $ 21.6 $ 21.6 Interest Expense on RRB Principal (included in Interest Expense) 4.3 4.6 8.7 9.3

PENSION BENEFITS AND POSTRETI_2

PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION (Tables)	6 Months Ended
	Jun. 30, 2022
Postemployment Benefits [Abstract]
Components of Net Periodic Benefit Expense/(Income)	The components of net periodic benefit plan expense/(income) for the Pension, SERP and PBOP Plans, prior to amounts capitalized as Property, Plant and Equipment or deferred as regulatory assets/(liabilities) for future recovery or refund, are shown below. The service cost component of net periodic benefit plan expense/(income), less the capitalized portion, is included in Operations and Maintenance expense on the statements of income. The remaining components of net periodic benefit plan expense/(income), less the deferred portion, are included in Other Income, Net on the statements of income. Pension, SERP and PBOP expense/(income) reflected in the statements of cash flows for CL&P, NSTAR Electric and PSNH does not include intercompany allocations of net periodic benefit plan expense/(income), as these amounts are cash settled on a short-term basis. Pension and SERP PBOP For the Three Months Ended June 30, 2022 For the Three Months Ended June 30, 2022 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Service Cost $ 17.5 $ 4.7 $ 3.4 $ 1.7 $ 3.0 $ 0.5 $ 0.5 $ 0.3 Interest Cost 38.6 7.8 8.2 4.2 5.1 0.9 1.3 0.6 Expected Return on Plan Assets (130.7) (26.5) (32.1) (14.0) (22.6) (2.8) (10.6) (1.7) Actuarial Losses, net 28.4 4.0 8.1 1.9 — — — — Prior Service Cost/(Credit) 0.3 — 0.1 — (5.4) 0.3 (4.2) 0.1 Total Net Periodic Benefit Plan Income $ (45.9) $ (10.0) $ (12.3) $ (6.2) $ (19.9) $ (1.1) $ (13.0) $ (0.7) Intercompany Income Allocations N/A $ (4.1) $ (3.2) $ (0.9) N/A $ (0.9) $ (0.9) $ (0.3) Pension and SERP PBOP For the Six Months Ended June 30, 2022 For the Six Months Ended June 30, 2022 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 35.2 $ 9.2 $ 7.0 $ 3.5 $ 5.8 $ 1.0 $ 1.0 $ 0.5 Interest Cost 77.2 15.6 16.3 8.4 10.1 1.8 2.6 1.1 Expected Return on Plan Assets (262.4) (53.1) (64.1) (28.1) (45.0) (5.6) (21.2) (3.3) Actuarial Losses, net 59.1 8.2 16.6 4.1 — — — — Prior Service Cost/(Credit) 0.7 — 0.2 — (10.8) 0.5 (8.5) 0.2 Total Net Periodic Benefit Plan Income $ (90.2) $ (20.1) $ (24.0) $ (12.1) $ (39.9) $ (2.3) $ (26.1) $ (1.5) Intercompany Income Allocations N/A $ (7.9) $ (6.1) $ (1.7) N/A $ (1.8) $ (1.8) $ (0.6) Pension and SERP PBOP For the Three Months Ended June 30, 2021 For the Three Months Ended June 30, 2021 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 18.4 $ 5.5 $ 3.9 $ 2.2 $ 3.3 $ 0.6 $ 0.6 $ 0.3 Interest Cost 27.1 6.7 6.7 3.6 4.2 0.8 1.1 0.4 Expected Return on Plan Assets (87.4) (21.7) (27.1) (11.8) (19.8) (2.6) (9.2) (1.5) Actuarial Loss 47.8 10.8 15.3 5.2 1.3 0.4 0.5 0.1 Prior Service Cost/(Credit) 0.3 — 0.1 — (5.3) 0.3 (4.2) 0.1 Total Net Periodic Benefit Plan Expense/(Income) $ 6.2 $ 1.3 $ (1.1) $ (0.8) $ (16.3) $ (0.5) $ (11.2) $ (0.6) Intercompany Expense/(Income) Allocations N/A $ 2.3 $ 2.5 $ 0.7 N/A $ (0.6) $ (0.6) $ (0.2) Pension and SERP PBOP For the Six Months Ended June 30, 2021 For the Six Months Ended June 30, 2021 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 39.7 $ 11.8 $ 7.9 $ 4.4 $ 6.8 $ 1.2 $ 1.2 $ 0.6 Interest Cost 59.7 14.0 13.4 7.2 8.6 1.6 2.2 0.9 Expected Return on Plan Assets (196.3) (43.3) (54.0) (23.7) (39.5) (5.2) (18.5) (3.0) Actuarial Loss 109.4 23.8 30.8 10.1 3.9 0.8 1.1 0.3 Prior Service Cost/(Credit) 0.6 — 0.2 — (10.6) 0.5 (8.4) 0.2 Total Net Periodic Benefit Plan Expense/(Income) $ 13.1 $ 6.3 $ (1.7) $ (2.0) $ (30.8) $ (1.1) $ (22.4) $ (1.0) Intercompany Expense/(Income) Allocations N/A $ 3.6 $ 4.0 $ 1.2 N/A $ (0.9) $ (1.0) $ (0.3)

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Environmental Sites and Related Reserves	The number of environmental sites and related reserves for which remediation or long-term monitoring, preliminary site work or site assessment is being performed are as follows: As of June 30, 2022 As of December 31, 2021 Number of Sites Reserve Number of Sites Reserve Eversource 62 $ 121.3 61 $ 115.4 CL&P 14 14.3 14 13.9 NSTAR Electric 11 3.6 11 3.3 PSNH 9 6.3 9 6.3
Non-Cancelable Commitments under Purchase Commitment Contracts	Renewable energy contracts include non-cancelable commitments under contracts of NSTAR Electric for the purchase of energy and RECs from renewable energy facilities. NSTAR Electric (Millions of Dollars) 2022 2023 2024 2025 2026 Thereafter Total Renewable Energy $ 50.4 $ 78.3 $ 269.4 $ 315.8 $ 322.1 $ 5,812.2 $ 6,848.2
Summary of Exposure to Guarantees and Indemnifications	The following table summarizes Eversource parent's exposure to guarantees and indemnifications of its subsidiaries and affiliates to external parties, and primarily relates to its offshore wind business: As of June 30, 2022 Company (Obligor) Description Maximum Exposure Expiration Dates North East Offshore LLC Construction-related purchase agreements with third-party contractors (1) $ 889.9 (1) Sunrise Wind LLC Construction-related purchase agreements with third-party contractors (2) 353.9 2025 - 2026 Revolution Wind, LLC Construction-related purchase agreements with third-party contractors (3) 353.8 2024 - 2027 South Fork Wind, LLC Construction-related purchase agreements with third-party contractors (4) 165.1 2023 - 2026 Eversource Investment LLC Funding and indemnification obligations of North East Offshore LLC (5) 100.9 (5) South Fork Wind, LLC Power Purchase Agreement Security (6) 7.1 (6) Sunrise Wind LLC OREC capacity production (7) 2.2 (7) Bay State Wind LLC Real estate purchase 2.5 2023 South Fork Wind, LLC Transmission interconnection 1.2 — Eversource Investment LLC Letters of Credit (8) 4.3 — Various Surety bonds (9) 35.7 2022 - 2023 Eversource Service Lease payments for real estate 0.6 2024 (1) Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, North East Offshore LLC (NEO), under which Eversource parent agreed to guarantee 50 percent of NEO’s performance of obligations under certain purchase agreements with third-party contractors, in an aggregate amount not to exceed $1.3 billion with an expiration date in 2025. Eversource parent also issued a separate guarantee to Ørsted on behalf of NEO, under which Eversource parent agreed to guarantee 50 percent of NEO’s payment obligations under certain offshore wind project construction-related agreements with Ørsted in an aggregate amount not to exceed $62.5 million and expiring upon full performance of the guaranteed obligation. Any amounts paid under this guarantee to Ørsted will count toward, but not increase, the maximum amount of the Funding Guarantee described in Note 5, below. (2) Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an aggregate amount not to exceed $464.7 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from March 2025 and April 2026 and (ii) full performance of the guaranteed obligations. (3) Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Revolution Wind, LLC, whereby Eversource parent will guarantee Revolution Wind, LLC's performance of certain obligations, in an aggregate amount not to exceed $409.3 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from October 2024 and November 2027 and (ii) full performance of the guaranteed obligations. (4) Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations in connection with construction-related purchase agreements. Under these guarantees, Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in a total aggregate amount not to exceed $207.1 million. Eversource parent’s obligations under these guarantees expire upon the earlier of (i) dates ranging from June 2023 and August 2026 and (ii) full performance of the guaranteed obligations. (5) Eversource parent issued a guarantee (Funding Guarantee) on behalf of Eversource Investment LLC (EI), its wholly-owned subsidiary that holds a 50 percent ownership interest in NEO, under which Eversource parent agreed to guarantee certain funding obligations and certain indemnification payments of EI under the operating agreement of NEO, in an amount not to exceed $910 million. The guaranteed obligations include payment of EI's funding obligations during the construction phase of NEO’s underlying offshore wind projects and indemnification obligations associated with third party credit support for its investment in NEO. Eversource parent’s obligations under the Funding Guarantee expire upon the full performance of the guaranteed obligations. (6) Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in an amount not to exceed $7.1 million, under a Power Purchase Agreement between the Long Island Power Authority and South Fork Wind, LLC (the Agreement). The guarantee expires upon the later of (i) the end of the Agreement term and (ii) full performance of the guarantee obligations. (7) Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an amount not to exceed $15.4 million, under the Offshore Wind Renewable Energy Certificate Purchase and Sale Agreement (the Agreement). The Agreement was executed by and between the New York State Energy Research and Development Authority (NYSERDA) and Sunrise Wind LLC. The guarantee expires upon the full performance of the guaranteed obligations. (8) On September 16, 2020, Eversource parent entered into a guarantee on behalf of EI, which holds Eversource's investments in offshore wind-related equity method investments, under which Eversource parent would guarantee EI's obligations under a letter of credit facility with a financial institution that EI may request in an aggregate amount of up to approximately $25 million. In January 2022, Eversource parent issued two letters of credit on behalf of South Fork Wind, LLC related to future decommissioning obligations of certain onshore transmission assets totaling $4.3 million. (9) Surety bond expiration dates reflect termination dates, the majority of which will be renewed or extended. Certain surety bonds contain credit ratings triggers that would require Eversource parent to post collateral in the event that the unsecured debt credit ratings of Eversource parent are downgraded.

FAIR VALUE OF FINANCIAL INSTR_2

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Carrying Amounts and Estimated Fair Values of Financial Instruments	Carrying amounts and estimated fair values are as follows: Eversource CL&P NSTAR Electric PSNH (Millions of Dollars) Carrying Fair Carrying Fair Carrying Fair Carrying Fair As of June 30, 2022: Preferred Stock Not Subject to Mandatory Redemption $ 155.6 $ 146.9 $ 116.2 $ 107.2 $ 43.0 $ 39.7 $ — $ — Long-Term Debt 20,849.2 19,531.4 4,215.9 4,053.3 4,429.7 4,295.6 1,164.2 1,027.2 Rate Reduction Bonds 475.3 465.0 — — — — 475.3 465.0 As of December 31, 2021: Preferred Stock Not Subject to Mandatory Redemption $ 155.6 $ 166.3 $ 116.2 $ 122.3 $ 43.0 $ 44.0 $ — $ — Long-Term Debt 18,216.7 19,636.3 4,215.4 4,848.9 3,985.4 4,453.5 1,163.8 1,220.6 Rate Reduction Bonds 496.9 543.3 — — — — 496.9 543.3

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Changes in Accumulated Other Comprehensive Income/(Loss) by Component, Net of Tax	The changes in accumulated other comprehensive income/(loss) by component, net of tax, are as follows: For the Six Months Ended June 30, 2022 For the Six Months Ended June 30, 2021 Eversource (Millions of Dollars) Qualified Unrealized Defined Total Qualified Unrealized Defined Total Balance as of Beginning of Period $ (0.4) $ 0.4 $ (42.3) $ (42.3) $ (1.4) $ 1.1 $ (76.1) $ (76.4) OCI Before Reclassifications — (1.3) (2.5) (3.8) — (0.5) (2.4) (2.9) Amounts Reclassified from AOCI — — 3.2 3.2 0.9 — 4.1 5.0 Net OCI — (1.3) 0.7 (0.6) 0.9 (0.5) 1.7 2.1 Balance as of End of Period $ (0.4) $ (0.9) $ (41.6) $ (42.9) $ (0.5) $ 0.6 $ (74.4) $ (74.3)

COMMON SHARES (Tables)

COMMON SHARES (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Common Shares Authorized and Issued	The following table sets forth the Eversource parent common shares and the shares of common stock of CL&P, NSTAR Electric and PSNH that were authorized and issued, as well as the respective per share par values: Shares Authorized as of June 30, 2022 and December 31, 2021 Issued as of Par Value June 30, 2022 December 31, 2021 Eversource $ 5 380,000,000 359,211,206 357,818,402 CL&P $ 10 24,500,000 6,035,205 6,035,205 NSTAR Electric $ 1 100,000,000 200 200 PSNH $ 1 100,000,000 301 301

EARNINGS PER SHARE (Tables)

EARNINGS PER SHARE (Tables)	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Components of Basic and Diluted EPS	The following table sets forth the components of basic and diluted EPS: Eversource (Millions of Dollars, except share information) For the Three Months Ended For the Six Months Ended June 30, 2022 June 30, 2021 June 30, 2022 June 30, 2021 Net Income Attributable to Common Shareholders $ 291.9 $ 264.5 $ 735.3 $ 630.7 Weighted Average Common Shares Outstanding: Basic 345,893,714 343,844,626 345,525,030 343,761,435 Dilutive Effect 401,764 591,070 453,276 623,758 Diluted 346,295,478 344,435,696 345,978,306 344,385,193 Basic and Diluted EPS $ 0.84 $ 0.77 $ 2.13 $ 1.83

REVENUES (Tables)

REVENUES (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Operating Revenues Disaggregated by Revenue Source	The following tables present operating revenues disaggregated by revenue source: For the Three Months Ended June 30, 2022 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,004.8 $ 218.5 $ — $ 35.3 $ — $ — $ 1,258.6 Commercial 664.1 122.6 — 16.7 — (1.4) 802.0 Industrial 88.9 43.5 — 1.1 — (5.1) 128.4 Total Retail Tariff Sales Revenues 1,757.8 384.6 — 53.1 — (6.5) 2,189.0 Wholesale Transmission Revenues — — 334.5 — 25.1 (266.4) 93.2 Wholesale Market Sales Revenues 212.6 33.2 — 0.9 — — 246.7 Other Revenues from Contracts with Customers 18.4 1.2 3.2 2.3 310.6 (309.8) 25.9 Amortization of/(Reserve for) Revenues Subject to Refund (1) 6.5 — 0.7 (0.4) — — 6.8 Total Revenues from Contracts with Customers 1,995.3 419.0 338.4 55.9 335.7 (582.7) 2,561.6 Alternative Revenue Programs 6.8 (3.0) 119.0 (1.4) — (113.2) 8.2 Other Revenues (2) 2.3 0.2 0.2 0.1 — — 2.8 Total Operating Revenues $ 2,004.4 $ 416.2 $ 457.6 $ 54.6 $ 335.7 $ (695.9) $ 2,572.6 For the Six Months Ended June 30, 2022 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 2,191.0 $ 775.3 $ — $ 63.4 $ — $ — $ 3,029.7 Commercial 1,325.5 380.1 — 31.3 — (2.5) 1,734.4 Industrial 178.5 111.6 — 2.2 — (9.6) 282.7 Total Retail Tariff Sales Revenues 3,695.0 1,267.0 — 96.9 — (12.1) 5,046.8 Wholesale Transmission Revenues — — 780.7 — 49.6 (631.1) 199.2 Wholesale Market Sales Revenues 578.1 66.7 — 1.7 — — 646.5 Other Revenues from Contracts with Customers 36.1 2.2 7.0 4.2 669.7 (662.9) 56.3 Amortization of/(Reserve for) Revenues Subject to Refund (1) 64.9 — 0.7 (0.7) — — 64.9 Total Revenues from Contracts with Customers 4,374.1 1,335.9 788.4 102.1 719.3 (1,306.1) 6,013.7 Alternative Revenue Programs 11.5 7.2 104.0 0.8 — (99.6) 23.9 Other Revenues (2) 5.1 0.7 0.4 0.2 — — 6.4 Total Operating Revenues $ 4,390.7 $ 1,343.8 $ 892.8 $ 103.1 $ 719.3 $ (1,405.7) $ 6,044.0 For the Three Months Ended June 30, 2021 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 882.1 $ 174.2 $ — $ 36.0 $ — $ — $ 1,092.3 Commercial 594.1 89.6 — 16.1 — (1.3) 698.5 Industrial 82.0 34.8 — 1.1 — (4.4) 113.5 Total Retail Tariff Sales Revenues 1,558.2 298.6 — 53.2 — (5.7) 1,904.3 Wholesale Transmission Revenues — — 416.9 — 20.3 (345.9) 91.3 Wholesale Market Sales Revenues 97.2 15.7 — 1.0 — — 113.9 Other Revenues from Contracts with Customers 25.1 1.0 3.4 1.2 309.7 (307.0) 33.4 Total Revenues from Contracts with Customers 1,680.5 315.3 420.3 55.4 330.0 (658.6) 2,142.9 Alternative Revenue Programs (4.8) (3.4) (9.3) (2.7) — (1.2) (21.4) Other Revenues (2) 0.8 (0.1) 0.2 0.1 — — 1.0 Total Operating Revenues $ 1,676.5 $ 311.8 $ 411.2 $ 52.8 $ 330.0 $ (659.8) $ 2,122.5 For the Six Months Ended June 30, 2021 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,948.1 $ 641.1 $ — $ 63.7 $ — $ — $ 2,652.9 Commercial 1,154.0 297.4 — 29.8 — (2.7) 1,478.5 Industrial 165.0 90.8 — 2.2 — (8.0) 250.0 Total Retail Tariff Sales Revenues 3,267.1 1,029.3 — 95.7 — (10.7) 4,381.4 Wholesale Transmission Revenues — — 811.2 — 39.5 (666.9) 183.8 Wholesale Market Sales Revenues 246.3 42.0 — 1.8 — — 290.1 Other Revenues from Contracts with Customers 43.4 2.4 6.8 2.4 633.5 (628.3) 60.2 Total Revenues from Contracts with Customers 3,556.8 1,073.7 818.0 99.9 673.0 (1,305.9) 4,915.5 Alternative Revenue Programs 18.2 18.6 (6.6) (0.9) — 1.0 30.3 Other Revenues (2) 1.9 — 0.5 0.2 — — 2.6 Total Operating Revenues $ 3,576.9 $ 1,092.3 $ 811.9 $ 99.2 $ 673.0 $ (1,304.9) $ 4,948.4 For the Three Months Ended June 30, 2022 For the Three Months Ended June 30, 2021 (Millions of Dollars) CL&P NSTAR Electric PSNH CL&P NSTAR Electric PSNH Revenues from Contracts with Customers Retail Tariff Sales Residential $ 526.1 $ 326.9 $ 151.8 $ 440.8 $ 304.7 $ 136.6 Commercial 255.3 327.8 81.7 215.7 296.1 82.8 Industrial 36.0 30.6 22.3 28.4 29.1 24.5 Total Retail Tariff Sales Revenues 817.4 685.3 255.8 684.9 629.9 243.9 Wholesale Transmission Revenues 115.8 163.6 55.1 195.7 160.1 61.1 Wholesale Market Sales Revenues 143.4 47.8 21.4 68.1 18.9 10.2 Other Revenues from Contracts with Customers 7.5 11.8 3.0 9.5 15.3 4.4 Amortization of Revenues Subject to Refund (1) 7.2 — — — — — Total Revenues from Contracts with Customers 1,091.3 908.5 335.3 958.2 824.2 319.6 Alternative Revenue Programs 92.2 14.3 19.3 (1.1) (15.3) 2.3 Other Revenues (2) 0.2 1.6 0.7 (0.2) 0.7 0.5 Eliminations (148.0) (140.7) (48.2) (127.3) (122.2) (43.6) Total Operating Revenues $ 1,035.7 $ 783.7 $ 307.1 $ 829.6 $ 687.4 $ 278.8 For the Six Months Ended June 30, 2022 For the Six Months Ended June 30, 2021 (Millions of Dollars) CL&P NSTAR Electric PSNH CL&P NSTAR Electric PSNH Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,125.2 $ 731.5 $ 334.3 $ 986.6 $ 667.1 $ 294.4 Commercial 497.5 659.1 170.1 429.9 564.4 160.6 Industrial 69.5 64.7 44.3 65.2 53.6 46.2 Total Retail Tariff Sales Revenues 1,692.2 1,455.3 548.7 1,481.7 1,285.1 501.2 Wholesale Transmission Revenues 325.0 328.8 126.9 384.6 307.2 119.4 Wholesale Market Sales Revenues 423.4 105.6 49.1 177.8 43.4 25.1 Other Revenues from Contracts with Customers 15.3 23.4 5.7 16.8 27.0 7.6 Amortization of Revenues Subject to Refund (1) 65.6 — — — — — Total Revenues from Contracts with Customers 2,521.5 1,913.1 730.4 2,060.9 1,662.7 653.3 Alternative Revenue Programs 93.4 6.1 16.0 7.8 (1.5) 5.3 Other Revenues (2) 0.3 3.6 1.6 0.1 1.8 0.5 Eliminations (293.7) (276.0) (101.5) (251.9) (238.6) (86.8) Total Operating Revenues $ 2,321.5 $ 1,646.8 $ 646.5 $ 1,816.9 $ 1,424.4 $ 572.3 (1) Amortization of Revenues Subject to Refund within the Electric Distribution segment in the second quarter and first half of 2022 represents customer credits being distributed to CL&P’s customers on retail electric bills as a result of the October 2021 CL&P settlement agreement and the 2021 civil penalty for non-compliance with storm performance standards. Total customer credits as a result of the 2021 settlement and civil penalty were $93.4 million. The settlement amount of $65 million was refunded over a two-month billing period from December 1, 2021 to January 31, 2022 and the civil penalty of $28.4 million is being refunded over a one year billing period, which began September 1, 2021. Other Revenues also include lease revenues under lessor accounting guidance

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Summary of Segment Information and Segmented Total Assets	Eversource's segment information is as follows: For the Three Months Ended June 30, 2022 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 2,004.4 $ 416.2 $ 457.6 $ 54.6 $ 335.7 $ (695.9) $ 2,572.6 Depreciation and Amortization (198.1) (39.1) (83.3) (12.5) (33.2) 1.6 (364.6) Other Operating Expenses (1,636.1) (360.7) (141.3) (27.0) (279.4) 692.1 (1,752.4) Operating Income $ 170.2 $ 16.4 $ 233.0 $ 15.1 $ 23.1 $ (2.2) $ 455.6 Interest Expense $ (60.3) $ (16.7) $ (37.5) $ (8.4) $ (53.5) $ 16.3 $ (160.1) Other Income, Net 53.0 10.6 9.3 2.1 354.3 (335.4) 93.9 Net Income Attributable to Common Shareholders 129.0 7.7 151.5 9.0 316.0 (321.3) 291.9 For the Six Months Ended June 30, 2022 Eversource (Millions of Dollars) Electric Distribution Natural Gas Distribution Electric Transmission Water Distribution Other Eliminations Total Operating Revenues $ 4,390.7 $ 1,343.8 $ 892.8 $ 103.1 $ 719.3 $ (1,405.7) $ 6,044.0 Depreciation and Amortization (549.7) (91.1) (165.3) (24.8) (63.4) 3.3 (891.0) Other Operating Expenses (3,481.7) (1,018.0) (270.5) (54.1) (610.9) 1,400.8 (4,034.4) Operating Income $ 359.3 $ 234.7 $ 457.0 $ 24.2 $ 45.0 $ (1.6) $ 1,118.6 Interest Expense $ (119.8) $ (32.5) $ (70.6) $ (16.5) $ (100.3) $ 26.4 $ (313.3) Other Income, Net 100.5 20.8 18.2 4.2 850.2 (828.5) 165.4 Net Income Attributable to Common Shareholders 269.9 171.7 300.0 12.7 784.7 (803.7) 735.3 Cash Flows Used for Investments in Plant 541.8 275.4 543.6 65.6 122.7 — 1,549.1 For the Three Months Ended June 30, 2021 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 1,676.5 $ 311.8 $ 411.2 $ 52.8 $ 330.0 $ (659.8) $ 2,122.5 Depreciation and Amortization (132.3) (34.6) (74.5) (11.5) (28.4) 1.1 (280.2) Other Operating Expenses (1,360.3) (257.7) (121.9) (25.4) (285.7) 660.3 (1,390.7) Operating Income $ 183.9 $ 19.5 $ 214.8 $ 15.9 $ 15.9 $ 1.6 $ 451.6 Interest Expense $ (61.1) $ (14.6) $ (32.6) $ (8.1) $ (41.8) $ 12.8 $ (145.4) Other Income, Net 29.9 4.6 6.8 0.9 309.2 (304.8) 46.6 Net Income Attributable to Common Shareholders 121.6 4.1 137.6 8.9 282.7 (290.4) 264.5 For the Six Months Ended June 30, 2021 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 3,576.9 $ 1,092.3 $ 811.9 $ 99.2 $ 673.0 $ (1,304.9) $ 4,948.4 Depreciation and Amortization (354.3) (80.3) (148.0) (22.8) (55.7) 2.1 (659.0) Other Operating Expenses (2,890.8) (793.6) (237.3) (50.5) (585.2) 1,305.2 (3,252.2) Operating Income $ 331.8 $ 218.4 $ 426.6 $ 25.9 $ 32.1 $ 2.4 $ 1,037.2 Interest Expense $ (114.4) $ (28.5) $ (65.3) $ (16.0) $ (83.4) $ 24.4 $ (283.2) Other Income, Net 50.6 8.5 12.2 1.9 733.4 (725.8) 80.8 Net Income Attributable to Common Shareholders 214.9 151.6 273.0 12.6 677.6 (699.0) 630.7 Cash Flows Used for Investments in Plant 510.4 305.9 443.2 53.8 109.9 — 1,423.2 The following table summarizes Eversource's segmented total assets: Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total As of June 30, 2022 $ 26,238.1 $ 7,351.4 $ 12,938.6 $ 2,592.4 $ 23,833.9 $ (23,038.2) $ 49,916.2 As of December 31, 2021 25,411.2 7,215.9 12,377.8 2,551.1 22,674.7 (21,738.6) 48,492.1

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands, customer in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) utility customer	May 04, 2022	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Summary of Accounting Policies [Line Items]
Investments in unconsolidated affiliates	$ 1,719,878			$ 1,436,293
Number of electric, natural gas and water customers | customer	4.4
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 457,800		$ 432,200	417,400	$ 425,800	$ 391,700	$ 358,900
Cash, cash equivalents, restricted cash and restricted cash equivalents	156,676			221,008	368,011		264,950
Energy Relief Fund - Merrimack Valley Programs
Summary of Accounting Policies [Line Items]
Restricted cash, current	20,000
Energy Relief Fund - Merrimack Valley Programs | Other Long-Term Assets
Summary of Accounting Policies [Line Items]
Restricted cash, noncurrent	15,900
Restricted cash				41,500
COVID-19
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	63,100			55,300
CL&P
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 192,700		180,500	181,300	188,800	175,100	157,400
Period of accounts receivable recoverable under financial or medical duress	180 days
Cash, cash equivalents, restricted cash and restricted cash equivalents	$ 17,911			74,788	207,441		99,809
CL&P | Customer Assistance Fund
Summary of Accounting Policies [Line Items]
Cash, cash equivalents, restricted cash and restricted cash equivalents	10,000			10,000
CL&P | COVID-19
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	20,400			23,900
NSTAR Electric
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	100,500		94,800	97,000	98,000	89,300	91,600
Cash, cash equivalents, restricted cash and restricted cash equivalents	22,724			18,179	17,898		17,410
NSTAR Electric | COVID-19
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	7,500			9,000
PSNH
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	27,300		$ 26,200	24,300	17,200	$ 17,300	17,200
Cash, cash equivalents, restricted cash and restricted cash equivalents	34,299			35,126	$ 39,226		$ 39,555
PSNH | COVID-19
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 0			$ 0
Yankee Gas
Summary of Accounting Policies [Line Items]
Period of accounts receivable recoverable under financial or medical duress	90 days
Connecticut, Massachusetts and New Hampshire
Summary of Accounting Policies [Line Items]
Number of regulated utilities | utility	10
Offshore Wind Business
Summary of Accounting Policies [Line Items]
Ownership interest		50%
North East Offshore LLC
Summary of Accounting Policies [Line Items]
Ownership interest	50%

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Provision for Uncollectible Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 432,200	$ 391,700	$ 417,400	$ 358,900
Uncollectible Expense	12,900	11,400	30,032	27,683
Uncollectible Costs Deferred	34,000	41,100	49,700	73,600
Write-Offs	(25,700)	(21,500)	(50,000)	(41,500)
Recoveries Collected	4,400	3,100	10,700	7,100
Ending Balance	457,800	425,800	457,800	425,800
CL&P
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	180,500	175,100	181,300	157,400
Uncollectible Expense	2,900	2,800	6,701	6,614
Uncollectible Costs Deferred	17,200	17,600	11,000	36,900
Write-Offs	(9,500)	(7,700)	(11,100)	(14,500)
Recoveries Collected	1,600	1,000	4,800	2,400
Ending Balance	192,700	188,800	192,700	188,800
NSTAR Electric
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	94,800	89,300	97,000	91,600
Uncollectible Expense	4,000	3,500	8,688	7,394
Uncollectible Costs Deferred	7,800	11,800	9,900	11,700
Write-Offs	(7,800)	(7,800)	(18,700)	(15,500)
Recoveries Collected	1,700	1,200	3,600	2,800
Ending Balance	100,500	98,000	100,500	98,000
PSNH
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	26,200	17,300	24,300	17,200
Uncollectible Expense	2,000	2,000	4,544	3,226
Uncollectible Costs Deferred	100	(300)	1,100	800
Write-Offs	(1,300)	(2,000)	(3,100)	(4,500)
Recoveries Collected	300	200	500	500
Ending Balance	27,300	17,200	27,300	17,200
Hardship Accounts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	225,500	197,300	226,100	194,800
Uncollectible Expense	0	0	0	0
Uncollectible Costs Deferred	21,400	16,600	22,400	22,000
Write-Offs	(4,600)	(3,400)	(6,900)	(6,700)
Recoveries Collected	400	200	1,100	600
Ending Balance	242,700	210,700	242,700	210,700
Hardship Accounts | CL&P
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	140,100	138,400	144,600	129,100
Uncollectible Expense	0	0	0	0
Uncollectible Costs Deferred	15,000	9,300	11,000	21,200
Write-Offs	(3,300)	(2,300)	(4,400)	(5,200)
Recoveries Collected	300	200	900	500
Ending Balance	152,100	145,600	152,100	145,600
Hardship Accounts | NSTAR Electric
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	39,700	31,100	43,300	39,700
Uncollectible Expense	0	0	0	0
Uncollectible Costs Deferred	5,400	4,900	2,100	(3,500)
Write-Offs	(100)	(100)	(400)	(300)
Recoveries Collected	0	0	0	0
Ending Balance	45,000	35,900	45,000	35,900
Retail (Non-Hardship), Wholesale, and Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	206,700	194,400	191,300	164,100
Uncollectible Expense	12,900	11,400	30,000	27,700
Uncollectible Costs Deferred	12,600	24,500	27,300	51,600
Write-Offs	(21,100)	(18,100)	(43,100)	(34,800)
Recoveries Collected	4,000	2,900	9,600	6,500
Ending Balance	215,100	215,100	215,100	215,100
Retail (Non-Hardship), Wholesale, and Other | CL&P
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	40,400	36,700	36,700	28,300
Uncollectible Expense	2,900	2,800	6,700	6,600
Uncollectible Costs Deferred	2,200	8,300	0	15,700
Write-Offs	(6,200)	(5,400)	(6,700)	(9,300)
Recoveries Collected	1,300	800	3,900	1,900
Ending Balance	40,600	43,200	40,600	43,200
Retail (Non-Hardship), Wholesale, and Other | NSTAR Electric
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	55,100	58,200	53,700	51,900
Uncollectible Expense	4,000	3,500	8,700	7,400
Uncollectible Costs Deferred	2,400	6,900	7,800	15,200
Write-Offs	(7,700)	(7,700)	(18,300)	(15,200)
Recoveries Collected	1,700	1,200	3,600	2,800
Ending Balance	$ 55,500	$ 62,100	$ 55,500	$ 62,100

SUMMARY OF SIGNIFICANT ACCOUN_6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Components of Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Summary of Accounting Policies [Line Items]
Other income, net	$ 93,861	$ 46,619	$ 165,422	$ 80,820
Pension, SERP and PBOP Non-Service   Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other income, net	54,900	22,100	109,200	42,200
AFUDC Equity
Summary of Accounting Policies [Line Items]
Other income, net	11,200	9,200	21,100	18,400
Equity in Earnings of Unconsolidated Affiliates (1)
Summary of Accounting Policies [Line Items]
Other income, net	16,600	4,700	17,100	8,400
Investment Income/(Loss)
Summary of Accounting Policies [Line Items]
Other income, net	1,300	1,900	1,100	1,300
Interest Income
Summary of Accounting Policies [Line Items]
Other income, net	9,500	8,400	16,100	9,900
Other
Summary of Accounting Policies [Line Items]
Other income, net	400	300	800	600
Equity In Earnings
Summary of Accounting Policies [Line Items]
Unrealized gain associated with investment	12,200	2,100	12,200	2,100
CL&P
Summary of Accounting Policies [Line Items]
Other income, net	19,800	9,879	39,363	14,787
CL&P | Pension, SERP and PBOP Non-Service   Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other income, net	16,200	4,300	32,100	7,000
CL&P | AFUDC Equity
Summary of Accounting Policies [Line Items]
Other income, net	2,800	1,700	5,600	3,400
CL&P | Equity in Earnings of Unconsolidated Affiliates (1)
Summary of Accounting Policies [Line Items]
Other income, net	0	0	0	0
CL&P | Investment Income/(Loss)
Summary of Accounting Policies [Line Items]
Other income, net	(700)	1,200	(1,100)	1,500
CL&P | Interest Income
Summary of Accounting Policies [Line Items]
Other income, net	1,500	2,700	2,800	2,800
CL&P | Other
Summary of Accounting Policies [Line Items]
Other income, net	0	0	0	100
NSTAR Electric
Summary of Accounting Policies [Line Items]
Other income, net	34,259	21,915	63,490	38,727
NSTAR Electric | Pension, SERP and PBOP Non-Service   Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other income, net	21,400	10,200	42,400	20,200
NSTAR Electric | AFUDC Equity
Summary of Accounting Policies [Line Items]
Other income, net	6,100	6,200	11,000	12,400
NSTAR Electric | Equity in Earnings of Unconsolidated Affiliates (1)
Summary of Accounting Policies [Line Items]
Other income, net	100	100	100	200
NSTAR Electric | Investment Income/(Loss)
Summary of Accounting Policies [Line Items]
Other income, net	500	600	200	800
NSTAR Electric | Interest Income
Summary of Accounting Policies [Line Items]
Other income, net	6,100	4,800	9,600	4,900
NSTAR Electric | Other
Summary of Accounting Policies [Line Items]
Other income, net	100	0	200	200
PSNH
Summary of Accounting Policies [Line Items]
Other income, net	7,782	4,260	15,292	8,427
PSNH | Pension, SERP and PBOP Non-Service   Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other income, net	6,700	2,700	13,300	5,400
PSNH | AFUDC Equity
Summary of Accounting Policies [Line Items]
Other income, net	600	300	1,000	900
PSNH | Equity in Earnings of Unconsolidated Affiliates (1)
Summary of Accounting Policies [Line Items]
Other income, net	0	0	0	0
PSNH | Investment Income/(Loss)
Summary of Accounting Policies [Line Items]
Other income, net	100	300	300	400
PSNH | Interest Income
Summary of Accounting Policies [Line Items]
Other income, net	400	900	700	1,600
PSNH | Other
Summary of Accounting Policies [Line Items]
Other income, net	$ 0	$ 100	$ 0	$ 100

SUMMARY OF SIGNIFICANT ACCOUN_7

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investments in Unconsolidated Affliates (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 1,719,878	$ 1,436,293
Offshore Wind Business - North East Offshore
Schedule of Equity Method Investments [Line Items]
Ownership interest	50%
Investments in unconsolidated affiliates	$ 1,487,100	1,213,600
Natural Gas Pipeline - Algonquin Gas Transmission, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest	15%
Investments in unconsolidated affiliates	$ 119,300	121,900
Renewable Energy Investment Fund
Schedule of Equity Method Investments [Line Items]
Ownership interest	90%
Investments in unconsolidated affiliates	$ 88,400	76,500
Other
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 25,100	$ 24,300

SUMMARY OF SIGNIFICANT ACCOUN_8

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Schedule of Gross Tax Receipts [Line Items]
Gross receipts taxes	$ 44.5	$ 39.9	$ 93.1	$ 88.5
CL&P
Schedule of Gross Tax Receipts [Line Items]
Gross receipts taxes	$ 39	$ 35.4	$ 76.8	$ 74.6

SUMMARY OF SIGNIFICANT ACCOUN_9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-cash Investing Activities (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Schedule of Supplemental Cash Flow [Line Items]
Plant additions included in accounts payable	$ 357.2	$ 344.8
CL&P
Schedule of Supplemental Cash Flow [Line Items]
Plant additions included in accounts payable	96.7	66.4
NSTAR Electric
Schedule of Supplemental Cash Flow [Line Items]
Plant additions included in accounts payable	75.1	103.8
PSNH
Schedule of Supplemental Cash Flow [Line Items]
Plant additions included in accounts payable	$ 49.6	$ 33.9

SUMMARY OF SIGNIFICANT ACCOU_10

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Cash Balances to Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Cash as reported on the Balance Sheets	$ 29,540	$ 66,773
Cash and Restricted Cash as reported on the Statements of Cash Flows	156,676	221,008	$ 368,011	$ 264,950
Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	90,800	78,200
Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	17,200	31,300
Other Long-Term Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	19,200	44,700
CL&P
Restricted Cash and Cash Equivalents Items [Line Items]
Cash as reported on the Balance Sheets	9,203	55,804
Cash and Restricted Cash as reported on the Statements of Cash Flows	17,911	74,788	207,441	99,809
CL&P | Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	8,700	18,700
CL&P | Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	300
CL&P | Other Long-Term Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	0
NSTAR Electric
Restricted Cash and Cash Equivalents Items [Line Items]
Cash as reported on the Balance Sheets	5,349	745
Cash and Restricted Cash as reported on the Statements of Cash Flows	22,724	18,179	17,898	17,410
NSTAR Electric | Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	17,400	17,400
NSTAR Electric | Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	100
NSTAR Electric | Other Long-Term Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	0
PSNH
Restricted Cash and Cash Equivalents Items [Line Items]
Cash as reported on the Balance Sheets	133	15
Cash and Restricted Cash as reported on the Statements of Cash Flows	34,299	35,126	$ 39,226	$ 39,555
PSNH | Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	30,900	31,400
PSNH | Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	100	500
PSNH | Other Long-Term Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 3,200	$ 3,200

REGULATORY ACCOUNTING - Compone

REGULATORY ACCOUNTING - Components of Regulatory Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Regulatory Assets [Line Items]
Total Regulatory Assets	$ 5,732,600	$ 5,715,800
Less:  Current Portion	1,163,411	1,129,093
Total Long-Term Regulatory Assets	4,569,236	4,586,709
Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	1,435,000	1,481,000
Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	1,250,100	1,102,700
Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	979,000	1,050,500
Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	798,000	790,700
Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	457,300	478,900
Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	289,400	297,800
Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	213,300	249,200
Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	121,000	115,000
Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	189,500	150,000
CL&P
Regulatory Assets [Line Items]
Total Regulatory Assets	2,060,200	2,084,800
Less:  Current Portion	396,447	371,609
Total Long-Term Regulatory Assets	1,663,820	1,713,161
CL&P | Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	267,600	272,400
CL&P | Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	733,800	695,600
CL&P | Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	306,100	333,600
CL&P | Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	476,600	470,500
CL&P | Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
CL&P | Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
CL&P | Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	213,300	249,200
CL&P | Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	34,700	33,600
CL&P | Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	28,100	29,900
NSTAR Electric
Regulatory Assets [Line Items]
Total Regulatory Assets	1,680,500	1,579,200
Less:  Current Portion	419,718	443,956
Total Long-Term Regulatory Assets	1,260,785	1,135,231
NSTAR Electric | Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	397,200	395,500
NSTAR Electric | Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	455,000	341,300
NSTAR Electric | Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	368,700	376,600
NSTAR Electric | Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	113,600	112,600
NSTAR Electric | Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
NSTAR Electric | Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	248,400	255,700
NSTAR Electric | Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
NSTAR Electric | Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	64,100	59,800
NSTAR Electric | Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	33,500	37,700
PSNH
Regulatory Assets [Line Items]
Total Regulatory Assets	736,900	786,400
Less:  Current Portion	93,225	107,169
Total Long-Term Regulatory Assets	643,745	679,182
PSNH | Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	116,700	118,900
PSNH | Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	61,300	65,800
PSNH | Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	68,300	85,400
PSNH | Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	13,900	17,500
PSNH | Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	457,300	478,900
PSNH | Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
PSNH | Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
PSNH | Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	4,200	4,100
PSNH | Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	$ 15,200	$ 15,800

REGULATORY ACCOUNTING - Narrati

REGULATORY ACCOUNTING - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved	$ 286.8	$ 252.5
COVID-19
Regulatory Assets [Line Items]
Net incremental deferred costs	37.6	33
CL&P
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved	123.2	114.9
CL&P | COVID-19
Regulatory Assets [Line Items]
Net incremental deferred costs	15.3	18
NSTAR Electric
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved	91.1	85
NSTAR Electric | COVID-19
Regulatory Assets [Line Items]
Net incremental deferred costs	4.8	6.1
PSNH
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved	$ 1.3	$ 3.4

REGULATORY ACCOUNTING - Compo_2

REGULATORY ACCOUNTING - Components of Regulatory Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	$ 4,646,600	$ 4,468,700
Less:  Current Portion	759,733	602,432
Total Long-Term Regulatory Liabilities	3,886,914	3,866,251
EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	2,646,100	2,685,200
Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	653,900	649,600
Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	701,900	448,400
Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	209,700	148,300
Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	116,000	133,500
AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	88,900	81,000
CL&P Settlement Agreement and Storm Performance Penalty
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	6,400	81,300
Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	223,700	241,400
CL&P
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	1,554,900	1,459,800
Less:  Current Portion	337,240	266,489
Total Long-Term Regulatory Liabilities	1,217,711	1,193,259
CL&P | EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	989,400	996,100
CL&P | Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	113,600	100,100
CL&P | Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	319,400	182,000
CL&P | Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	23,300	12,000
CL&P | Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
CL&P | AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	44,900	43,200
CL&P | CL&P Settlement Agreement and Storm Performance Penalty
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	6,400	81,300
CL&P | Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	57,900	45,100
NSTAR Electric
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	1,845,800	1,787,300
Less:  Current Portion	274,139	228,248
Total Long-Term Regulatory Liabilities	1,571,705	1,559,072
NSTAR Electric | EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	962,100	984,500
NSTAR Electric | Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	395,000	381,000
NSTAR Electric | Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	232,700	185,100
NSTAR Electric | Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	115,200	90,700
NSTAR Electric | Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	92,400	107,400
NSTAR Electric | AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	44,000	37,800
NSTAR Electric | CL&P Settlement Agreement and Storm Performance Penalty
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
NSTAR Electric | Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	4,400	800
PSNH
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	500,300	501,600
Less:  Current Portion	106,554	120,176
Total Long-Term Regulatory Liabilities	393,673	381,366
PSNH | EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	353,000	359,200
PSNH | Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	19,000	17,200
PSNH | Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	99,800	107,000
PSNH | Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	21,800	14,900
PSNH | Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
PSNH | AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
PSNH | CL&P Settlement Agreement and Storm Performance Penalty
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
PSNH | Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	$ 6,700	$ 3,300

PROPERTY, PLANT AND EQUIPMENT_3

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION - Summary of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Public Utility, Property, Plant and Equipment [Line Items]
Distribution - Electric	$ 18,001,800	$ 17,679,100
Distribution - Natural Gas	6,819,500	6,694,800
Transmission - Electric	13,229,500	12,882,400
Distribution - Water	1,940,200	1,900,900
Solar	200,900	200,900
Utility	40,191,900	39,358,100
Other	1,630,100	1,469,500
Property, Plant and Equipment, Gross	41,822,000	40,827,600
Less:  Accumulated Depreciation
Utility	(9,046,900)	(8,885,200)
Other	(640,100)	(580,100)
Total Accumulated Depreciation	(9,687,000)	(9,465,300)
Property, Plant and Equipment, Net	32,135,000	31,362,300
Construction Work in Progress	2,272,200	2,015,400
Total Property, Plant and Equipment, Net	34,407,210	33,377,650
CL&P
Public Utility, Property, Plant and Equipment [Line Items]
Distribution - Electric	7,252,700	7,117,600
Transmission - Electric	5,986,300	5,859,000
Solar	0	0
Property, Plant and Equipment, Gross	13,239,000	12,976,600
Less:  Accumulated Depreciation
Total Accumulated Depreciation	(2,589,200)	(2,572,100)
Property, Plant and Equipment, Net	10,649,800	10,404,500
Construction Work in Progress	441,200	399,000
Total Property, Plant and Equipment, Net	11,090,981	10,803,543
NSTAR Electric
Public Utility, Property, Plant and Equipment [Line Items]
Distribution - Electric	8,265,000	8,105,500
Transmission - Electric	5,207,000	5,090,500
Solar	200,900	200,900
Property, Plant and Equipment, Gross	13,672,900	13,396,900
Less:  Accumulated Depreciation
Total Accumulated Depreciation	(3,311,000)	(3,227,300)
Property, Plant and Equipment, Net	10,361,900	10,169,600
Construction Work in Progress	787,500	707,000
Total Property, Plant and Equipment, Net	11,149,405	10,876,614
PSNH
Public Utility, Property, Plant and Equipment [Line Items]
Distribution - Electric	2,524,400	2,496,200
Transmission - Electric	2,037,900	1,934,600
Solar	0	0
Property, Plant and Equipment, Gross	4,562,300	4,430,800
Less:  Accumulated Depreciation
Total Accumulated Depreciation	(911,900)	(908,400)
Property, Plant and Equipment, Net	3,650,400	3,522,400
Construction Work in Progress	169,800	134,100
Total Property, Plant and Equipment, Net	$ 3,820,237	$ 3,656,462

DERIVATIVE INSTRUMENTS - Gross

DERIVATIVE INSTRUMENTS - Gross Fair Values and Net Amounts of Contracts (Details) - CL&P - Level 3 - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Current Derivative Assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Commodity Supply and Price Risk Management	$ 15.2	$ 14.7
Netting	(0.5)	(1)
Net Amount Recorded as a Derivative	14.7	13.7
Other Long-Term Assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Commodity Supply and Price Risk Management	37.7	46.9
Netting	(1.1)	(0.9)
Net Amount Recorded as a Derivative	36.6	46
Current Derivative Liabilities
Current and Long-Term Derivative Liabilities
Commodity Supply and Price Risk Management	(75.9)	(73.5)
Netting	0	0
Net Amount Recorded as a Derivative	(75.9)	(73.5)
Long-Term Derivative Liabilities
Current and Long-Term Derivative Liabilities
Commodity Supply and Price Risk Management	(188.7)	(235.4)
Netting	0	0
Net Amount Recorded as a Derivative	$ (188.7)	$ (235.4)

DERIVATIVE INSTRUMENTS - Narrat

DERIVATIVE INSTRUMENTS - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) MW	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) MW	Jun. 30, 2021 USD ($)	Dec. 31, 2021 $ / KWmo MW
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of costs or benefits borne under capacity-related contracts by United Illuminated Company			20%
Amount of power to be purchased under capacity-related contract (in MW) | MW	675		675		675
Gains (losses) on deferred as regulatory costs | $	$ 2.6	$ 0.9	$ 8.8	$ (10.2)
Level 3 | Minimum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of exit price premiums related to derivative contracts			3.90%
Level 3 | Maximum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of exit price premiums related to derivative contracts			8.20%
Level 3 | Weighted Average
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of exit price premiums related to derivative contracts			7.10%
CL&P
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of costs or benefits borne under capacity-related contracts			80%
CL&P | Weighted Average | Measurement Input, Capacity Prices
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative measurement input | $ / KWmo					2.61

DERIVATIVE INSTRUMENTS - Summar

DERIVATIVE INSTRUMENTS - Summary of Level 3 Derivative Contracts and Significant Unobservable Inputs Used (Details) - CL&P - Forward Reserve Prices - Level 3 - $ / KWmo	Jun. 30, 2022	Dec. 31, 2021
Minimum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative measurement input	0.50	0.50
Maximum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative measurement input	0.50	1.15
Weighted Average
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative measurement input	0.50	0.82

DERIVATIVE INSTRUMENTS - Change

DERIVATIVE INSTRUMENTS - Changes in the Level 3 Category of Derivative Assets Measured at Fair Value on a Recurring Basis (Details) - CL&P - Level 3 - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivatives, Net [Rollforward]
Fair Value as of Beginning of Period	$ (229.4)	$ (293.1)	$ (249.2)	$ (293.1)
Net Realized/Unrealized Gains/(Losses) Included in Regulatory Assets	2.6	0.9	8.8	(11.5)
Settlements	13.5	12.5	27.1	24.9
Fair Value as of End of Period	$ (213.3)	$ (279.7)	$ (213.3)	$ (279.7)

MARKETABLE SECURITIES - Narrati

MARKETABLE SECURITIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Available-for-sale equity securities	$ 26.4		$ 26.4		$ 40.2
Unrealized (loss) gain recorded in other income	(4.7)	$ 1.9	(9.1)	$ 3
CYAPC and YAEC
Debt Securities, Available-for-sale [Line Items]
Available-for-sale equity securities	182.4		182.4		214
Marketable securities held in nuclear decommissioning trust	$ 174.4		$ 174.4		$ 189.9

MARKETABLE SECURITIES - Summary

MARKETABLE SECURITIES - Summary of Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized Cost	$ 207.9	$ 214.5
Pre-Tax Unrealized Gains	0.5	5.1
Pre-Tax Unrealized Losses	(12.3)	(0.2)
Fair Value	$ 196.1	$ 219.4

MARKETABLE SECURITIES - Contrac

MARKETABLE SECURITIES - Contractual Maturities of Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Amortized Cost
Less than one year	$ 18.5
One to five years	57.6
Six to ten years	41.2
Greater than ten years	90.6
Amortized Cost	207.9	$ 214.5
Fair Value
Less than one year	18.4
One to five years	56.7
Six to ten years	38
Greater than ten years	83
Fair Value	$ 196.1	$ 219.4

MARKETABLE SECURITIES - Marketa

MARKETABLE SECURITIES - Marketable Securities Recorded at Fair Value on a Recurring Basis by Level (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 404.9	$ 473.6
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	226	285.5
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	178.9	188.1
Mutual Funds and Equities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	208.8	254.2
Money Market Funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	17.2	31.3
U.S. Government Issued Debt Securities (Agency and Treasury) | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	84.2	81.3
Corporate Debt Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	54.9	65.3
Asset-Backed Debt Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	9.6	12.6
Municipal Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	13.8	12.3
Other Fixed Income Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 16.4	$ 16.6

SHORT-TERM AND LONG-TERM DEBT -

SHORT-TERM AND LONG-TERM DEBT - Narrative (Details) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 14, 2022	Dec. 31, 2021
Commercial Paper
Line of Credit Facility [Line Items]
Long-term debt	$ 88,700,000
NSTAR Electric
Line of Credit Facility [Line Items]
Notes payable to Eversource parent	3,200,000
CL&P
Line of Credit Facility [Line Items]
Notes payable to Eversource parent	67,500,000
PSNH
Line of Credit Facility [Line Items]
Notes payable to Eversource parent	89,300,000		$ 110,600,000
Line of Credit | CL&P
Line of Credit Facility [Line Items]
Maximum borrowing capacity	450,000,000
Amount outstanding under line of credit	0
Line of Credit | PSNH
Line of Credit Facility [Line Items]
Maximum borrowing capacity	300,000,000
Amount outstanding under line of credit	0
Line of Credit | NSTAR Gas
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 325,000,000
Commercial Paper | NSTAR Electric
Line of Credit Facility [Line Items]
Maximum borrowing capacity	650,000,000
Line of Credit
Line of Credit Facility [Line Items]
Amount outstanding under line of credit	0		$ 0
Line of Credit | NSTAR Electric
Line of Credit Facility [Line Items]
Maximum borrowing capacity	650,000,000
Eversource Parent | Commercial Paper
Line of Credit Facility [Line Items]
Maximum borrowing capacity	2,000,000,000
Eversource Parent | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 2,000,000,000
Debt instrument term	5 years
NSTAR Electric | Line of Credit | NSTAR Electric
Line of Credit Facility [Line Items]
Debt instrument term	5 years

SHORT-TERM AND LONG-TERM DEBT_2

SHORT-TERM AND LONG-TERM DEBT - Borrowings Outstanding and Available under the Commercial Paper Programs (Details) - Commercial Paper - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Borrowings outstanding	$ 124.5	$ 1,343
Available borrowing capacity	$ 1,875.5	$ 657
Weighted-average interest rate	1.81%	0.31%
NSTAR Electric
Debt Instrument [Line Items]
Borrowings outstanding	$ 63	$ 162.5
Available borrowing capacity	$ 587	$ 487.5
Weighted-average interest rate	1.63%	0.14%

SHORT-TERM AND LONG-TERM DEBT_3

SHORT-TERM AND LONG-TERM DEBT - Summary of Long-Term Debt Issuance and Repayments (Details) - USD ($) $ in Thousands	1 Months Ended					6 Months Ended
	Jul. 31, 2022	Jun. 30, 2022	May 31, 2022	Mar. 31, 2022	Feb. 28, 2022	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Retirement of Long-Term Debt						$ (770,000)	$ (1,022,000)
NSTAR Electric
Debt Instrument [Line Items]
Retirement of Long-Term Debt						$ 0	$ (250,000)
NSTAR Electric | Debentures | 4.55% 2022 Debentures
Debt Instrument [Line Items]
Interest rate, stated percentage			4.55%
Issuances			$ 450,000
NSTAR Electric | First Mortgage | NSTAR Gas 4.40% Series V First Mortgage Bonds | Subsequent Event
Debt Instrument [Line Items]
Interest rate, stated percentage	4.40%
Yankee Gas | First Mortgage | Yankee Gas 8.48% Series B First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage				8.48%
Retirement of Long-Term Debt				$ (20,000)
EGMA | First Mortgage | EGMA 4.70% Series C First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage		4.70%				4.70%
Issuances		$ 100,000
NSTAR Gas | First Mortgage | NSTAR Gas 4.40% Series V First Mortgage Bonds | Subsequent Event
Debt Instrument [Line Items]
Issuances	$ 125,000
Eversource Parent | Senior Notes | Eversource Parent 2.90% Series V Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage					2.90%
Issuances					$ 650,000
Eversource Parent | Senior Notes | Eversource Parent 3.38% Series W Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage					3.38%
Issuances					$ 650,000
Eversource Parent | Senior Notes | Eversource Parent 4.20% Series X Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage		4.20%				4.20%
Issuances		$ 900,000
Eversource Parent | Senior Notes | Eversource Parent 4.60% Series Y Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage		4.60%				4.60%
Issuances		$ 600,000
Eversource Parent | Senior Notes | Eversource Parent 2.75% Series K Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage				2.75%
Retirement of Long-Term Debt				$ (750,000)

RATE REDUCTION BONDS AND VARI_3

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Narrative (Details) - PSNH - Rate Reduction Bonds	May 31, 2018 USD ($)
Debt Instrument [Line Items]
Amount of securitized rate reduction bonds issued	$ 635,700,000
Weighted average interest rate	3.66%

RATE REDUCTION BONDS AND VARI_4

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Summary of the Impact of Funding on the Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	$ 5,732,600	$ 5,715,800
Regulatory Liabilities	3,886,914	3,866,251
Accrued Interest (included in Other Current Liabilities)	739,833	830,620
Rate Reduction Bonds - Current Portion	43,210	43,210
Rate Reduction Bonds - Long-Term Portion	432,097	453,702
Securitized Stranded Costs
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	457,300	478,900
Other Regulatory Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	189,500	150,000
Current Derivative Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	90,800	78,200
Other Long-Term Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	19,200	44,700
PSNH
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	736,900	786,400
Regulatory Liabilities	393,673	381,366
Accrued Interest (included in Other Current Liabilities)	54,772	63,005
Rate Reduction Bonds - Current Portion	43,210	43,210
Rate Reduction Bonds - Long-Term Portion	432,097	453,702
PSNH | VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Rate Reduction Bonds - Current Portion	43,200	43,200
Rate Reduction Bonds - Long-Term Portion	432,100	453,700
PSNH | Securitized Stranded Costs
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	457,300	478,900
PSNH | Securitized Stranded Costs | VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	457,300	478,900
PSNH | Other Regulatory Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	15,200	15,800
PSNH | Other Regulatory Assets | VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Regulatory Liabilities	5,200	5,400
Accrued Interest (included in Other Current Liabilities)	7,200	7,500
PSNH | Current Derivative Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	30,900	31,400
PSNH | Current Derivative Assets | VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	30,700	31,100
PSNH | Other Long-Term Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	3,200	3,200
PSNH | Other Long-Term Assets | VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	$ 3,200	$ 3,200

RATE REDUCTION BONDS AND VARI_5

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Summary of the Impact of Funding on the Income Statements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Condensed Income Statements, Captions [Line Items]
Interest Expense on RRB Principal (included in Interest Expense)	$ 160,090	$ 145,435	$ 313,334	$ 283,201
PSNH
Condensed Income Statements, Captions [Line Items]
Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net)	(9,218)	(26,274)	(36,052)	(44,821)
Interest Expense on RRB Principal (included in Interest Expense)	14,757	13,821	28,402	28,452
PSNH | VIE | Rate Reduction Bonds
Condensed Income Statements, Captions [Line Items]
Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net)	10,800	10,800	21,600	21,600
Interest Expense on RRB Principal (included in Interest Expense)	$ 4,300	$ 4,600	$ 8,700	$ 9,300

PENSION BENEFITS AND POSTRETI_3

PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION - Components of Net Periodic Benefit Expense/(Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension and SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 17.5	$ 18.4	$ 35.2	$ 39.7
Interest Cost	38.6	27.1	77.2	59.7
Expected Return on Plan Assets	(130.7)	(87.4)	(262.4)	(196.3)
Actuarial Losses, net	28.4	47.8	59.1	109.4
Prior Service Cost/(Credit)	0.3	0.3	0.7	0.6
Total Net Periodic Benefit Plan Income	(45.9)	6.2	(90.2)	13.1
PBOP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	3	3.3	5.8	6.8
Interest Cost	5.1	4.2	10.1	8.6
Expected Return on Plan Assets	(22.6)	(19.8)	(45)	(39.5)
Actuarial Losses, net	0	1.3	0	3.9
Prior Service Cost/(Credit)	(5.4)	(5.3)	(10.8)	(10.6)
Total Net Periodic Benefit Plan Income	(19.9)	(16.3)	(39.9)	(30.8)
CL&P | Pension and SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	4.7	5.5	9.2	11.8
Interest Cost	7.8	6.7	15.6	14
Expected Return on Plan Assets	(26.5)	(21.7)	(53.1)	(43.3)
Actuarial Losses, net	4	10.8	8.2	23.8
Prior Service Cost/(Credit)	0	0	0	0
Total Net Periodic Benefit Plan Income	(10)	1.3	(20.1)	6.3
Intercompany Income Allocations	(4.1)	2.3	(7.9)	3.6
CL&P | PBOP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.5	0.6	1	1.2
Interest Cost	0.9	0.8	1.8	1.6
Expected Return on Plan Assets	(2.8)	(2.6)	(5.6)	(5.2)
Actuarial Losses, net	0	0.4	0	0.8
Prior Service Cost/(Credit)	0.3	0.3	0.5	0.5
Total Net Periodic Benefit Plan Income	(1.1)	(0.5)	(2.3)	(1.1)
Intercompany Income Allocations	(0.9)	(0.6)	(1.8)	(0.9)
NSTAR Electric | Pension and SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	3.4	3.9	7	7.9
Interest Cost	8.2	6.7	16.3	13.4
Expected Return on Plan Assets	(32.1)	(27.1)	(64.1)	(54)
Actuarial Losses, net	8.1	15.3	16.6	30.8
Prior Service Cost/(Credit)	0.1	0.1	0.2	0.2
Total Net Periodic Benefit Plan Income	(12.3)	(1.1)	(24)	(1.7)
Intercompany Income Allocations	(3.2)	2.5	(6.1)	4
NSTAR Electric | PBOP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.5	0.6	1	1.2
Interest Cost	1.3	1.1	2.6	2.2
Expected Return on Plan Assets	(10.6)	(9.2)	(21.2)	(18.5)
Actuarial Losses, net	0	0.5	0	1.1
Prior Service Cost/(Credit)	(4.2)	(4.2)	(8.5)	(8.4)
Total Net Periodic Benefit Plan Income	(13)	(11.2)	(26.1)	(22.4)
Intercompany Income Allocations	(0.9)	(0.6)	(1.8)	(1)
PSNH | Pension and SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	1.7	2.2	3.5	4.4
Interest Cost	4.2	3.6	8.4	7.2
Expected Return on Plan Assets	(14)	(11.8)	(28.1)	(23.7)
Actuarial Losses, net	1.9	5.2	4.1	10.1
Prior Service Cost/(Credit)	0	0	0	0
Total Net Periodic Benefit Plan Income	(6.2)	(0.8)	(12.1)	(2)
Intercompany Income Allocations	(0.9)	0.7	(1.7)	1.2
PSNH | PBOP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.3	0.3	0.5	0.6
Interest Cost	0.6	0.4	1.1	0.9
Expected Return on Plan Assets	(1.7)	(1.5)	(3.3)	(3)
Actuarial Losses, net	0	0.1	0	0.3
Prior Service Cost/(Credit)	0.1	0.1	0.2	0.2
Total Net Periodic Benefit Plan Income	(0.7)	(0.6)	(1.5)	(1)
Intercompany Income Allocations	$ (0.3)	$ (0.2)	$ (0.6)	$ (0.3)

PENSION BENEFITS AND POSTRETI_4

PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION - Narrative (Details) $ in Millions	Jun. 30, 2022 USD ($)
PBOP
Defined Benefit Plan Disclosure [Line Items]
Expected pension plan contributions	$ 2.4
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected pension plan contributions	100
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected pension plan contributions	$ 175

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Environmental Sites and Related Reserves (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) site	Dec. 31, 2021 USD ($) site
Site Contingency [Line Items]
Number of Sites | site	62	61
Reserve | $	$ 121.3	$ 115.4
CL&P
Site Contingency [Line Items]
Number of Sites | site	14	14
Reserve | $	$ 14.3	$ 13.9
NSTAR Electric
Site Contingency [Line Items]
Number of Sites | site	11	11
Reserve | $	$ 3.6	$ 3.3
PSNH
Site Contingency [Line Items]
Number of Sites | site	9	9
Reserve | $	$ 6.3	$ 6.3

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Environmental Matters (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Site Contingency [Line Items]
Reserve balance	$ 121.3	$ 115.4
MGP Sites
Site Contingency [Line Items]
Reserve balance	$ 110.5	$ 105.6

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES - Non-Cancellable Commitments under Purchase Commitment Contracts (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) megawatt
Offshore Wind Project
Unrecorded Unconditional Purchase Obligation [Line Items]
Contract term	20 years
Energy capacity (in MW) | megawatt	800
Renewable Energy | NSTAR Electric
Unrecorded Unconditional Purchase Obligation [Line Items]
2022	$ 50.4
2023	78.3
2024	269.4
2025	315.8
2026	322.1
Thereafter	5,812.2
Total	6,848.2
Renewable Energy | NSTAR Electric | Massachusetts Clean Energy 83D Contract
Unrecorded Unconditional Purchase Obligation [Line Items]
Total	$ 6,000
Contract term	20 years
Renewable Energy | NSTAR Electric | Minimum | Massachusetts Clean Energy 83D Contract
Unrecorded Unconditional Purchase Obligation [Line Items]
Estimated costs	$ 240
Renewable Energy | NSTAR Electric | Maximum | Massachusetts Clean Energy 83D Contract
Unrecorded Unconditional Purchase Obligation [Line Items]
Estimated costs	$ 375

COMMITMENTS AND CONTINGENCIES_4

COMMITMENTS AND CONTINGENCIES - Guarantees and Obligations Narrative (Details) - USD ($)	Jun. 30, 2022	Jan. 31, 2022	Dec. 31, 2021	Sep. 16, 2020
Loss Contingencies [Line Items]
Fair value of guarantees	$ 4,700,000		$ 7,300,000
Letter of Credit | South Fork Wind, LLC
Loss Contingencies [Line Items]
Amount outstanding under line of credit		$ 4,300,000
Letter of Credit | Eversource Investment LLC
Loss Contingencies [Line Items]
Maximum borrowing capacity				$ 25,000,000

COMMITMENTS AND CONTINGENCIES_5

COMMITMENTS AND CONTINGENCIES - Guarantees and Indemnifications (Details) - USD ($) $ in Millions	Jun. 30, 2022	Oct. 25, 2019
North East Offshore LLC
Guarantor Obligations [Line Items]
Ownership interest	50%
Sunrise Wind LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 464.7
Ownership interest	50%
Revolution Wind, LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 409.3
Ownership interest	50%
South Fork Wind, LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 207.1
Eversource Investment LLC | North East Offshore LLC
Guarantor Obligations [Line Items]
Ownership interest	50%
Construction-related purchase agreements with third-party contractors | South Fork Wind, LLC
Guarantor Obligations [Line Items]
Ownership interest	50%
Construction-related purchase agreements with third-party contractors | North East Offshore LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 889.9
Construction-related purchase agreements with third-party contractors | Sunrise Wind LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	353.9
Construction-related purchase agreements with third-party contractors | Revolution Wind, LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	353.8
Construction-related purchase agreements with third-party contractors | South Fork Wind, LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	165.1
Funding and indemnification obligations of North East Offshore LLC | Eversource Investment LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	100.9
Funding and indemnification obligations of North East Offshore LLC | Eversource Investment LLC | North East Offshore LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	910
Power Purchase Agreement | South Fork Wind, LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 7.1
Ownership interest	50%
OREC capacity production | Sunrise Wind LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 2.2	$ 15.4
Ownership interest	50%
Real estate purchase | Bay State Wind LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 2.5
Transmission interconnection | South Fork Wind, LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	1.2
Letter of Credit | Eversource Investment LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	4.3
Surety bonds | Various
Guarantor Obligations [Line Items]
Maximum exposure (up to)	35.7
Lease payments for real estate | Eversource Service
Guarantor Obligations [Line Items]
Maximum exposure (up to)	0.6
Performance guarantee | North East Offshore LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 1,300
Percent of obligations guaranteed	50%
Payment guarantee | North East Offshore LLC
Guarantor Obligations [Line Items]
Maximum exposure (up to)	$ 62.5
Percent of obligations guaranteed	50%

COMMITMENTS AND CONTINGENCIES_6

COMMITMENTS AND CONTINGENCIES - Spent Nuclear Fuel Obligations - Yankee Companies (Details) $ in Millions	Mar. 25, 2021 USD ($)
CYAPC, YAEC, and MYAPC | Yankee Companies
Loss Contingencies [Line Items]
Damages sought	$ 120.4

COMMITMENTS AND CONTINGENCIES_7

COMMITMENTS AND CONTINGENCIES - FERC ROE Complaints (Details) $ in Millions			6 Months Ended	36 Months Ended
	Apr. 29, 2016 complaint	Oct. 16, 2014	Jun. 30, 2022 USD ($)	Oct. 15, 2014	Dec. 31, 2021 USD ($)	Oct. 16, 2018 complaint	Jul. 31, 2014 complaint
Loss Contingencies [Line Items]
Percentage of base ROE reasonably justified			10.41%
Percentage of incentive cap on total ROE			13.08%
FERC ROE Complaints
Loss Contingencies [Line Items]
Number of complaints filed | complaint	4					4
Period of complaint			15 months
Basis point change			0.10%
Estimate of possible loss for each 10 basis point change to base ROE			$ 3
FERC ROE First, Second and Third Complaints
Loss Contingencies [Line Items]
Number of complaints filed | complaint							3
Base ROE subsequently authorized			11.14%
FERC ROE First, Second and Third Complaints | Minimum
Loss Contingencies [Line Items]
Percentage of maximum ROE for any incentive project				11.14%
FERC ROE First, Second and Third Complaints | Maximum
Loss Contingencies [Line Items]
Percentage of maximum ROE for any incentive project				13.10%
FERC ROE Fourth Complaint
Loss Contingencies [Line Items]
Base ROE percentage of complaint period	10.57%
Maximum percentage cap of ROE for incentive projects	11.74%
FERC ROE First Complaint
Loss Contingencies [Line Items]
Base ROE subsequently authorized		10.57%
Percentage of maximum ROE for any incentive project		11.74%
Amounts associated with first complaint refunded			$ 38.9
FERC ROE First Complaint | CL&P
Loss Contingencies [Line Items]
Amounts associated with first complaint refunded			22.4
FERC ROE First Complaint | NSTAR Electric
Loss Contingencies [Line Items]
Amounts associated with first complaint refunded			13.7
FERC ROE First Complaint | PSNH
Loss Contingencies [Line Items]
Amounts associated with first complaint refunded			$ 2.8
FERC ROE Second Complaint
Loss Contingencies [Line Items]
Base ROE percentage of complaint period			10.57%
Percentage of maximum ROE for any incentive project			11.74%
Loss contingency, estimate of possible earnings impact			$ 39.1		$ 39.1
FERC ROE Second Complaint | CL&P
Loss Contingencies [Line Items]
Loss contingency, estimate of possible earnings impact			21.4		21.4
FERC ROE Second Complaint | NSTAR Electric
Loss Contingencies [Line Items]
Loss contingency, estimate of possible earnings impact			14.6		14.6
FERC ROE Second Complaint | PSNH
Loss Contingencies [Line Items]
Loss contingency, estimate of possible earnings impact			$ 3.1		$ 3.1

COMMITMENTS AND CONTINGENCIES_8

COMMITMENTS AND CONTINGENCIES - Eversource and NSTAR Electric Boston Harbor Civil Action (Details)	12 Months Ended
	Dec. 31, 2016 kV
Commitments and Contingencies Disclosure [Abstract]
Amount of capacity required for installation of distribution cable (in kV)	115

COMMITMENTS AND CONTINGENCIES_9

COMMITMENTS AND CONTINGENCIES - CL&P Tropical Storm Isaias Response Investigation (Details) - USD ($) $ / shares in Units, $ in Millions	Jul. 14, 2021	May 07, 2021	May 06, 2021	Apr. 28, 2021
Loss Contingencies [Line Items]
Loss contingency, allowed rate of ROE				9.25%
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Loss contingency, estimate of possible earnings impact			$ 30
Loss contingency, estimate of possible earnings impact, non-compliance with performance standards			28.4
Loss contingency, estimate of possible earnings impact, accident reporting violation fines			$ 1.6
Non-compliance fine	$ 28.6
Loss contingency, accident reporting violation fines	$ 0.2
Loss contingency, penalty rate as a percent of distribution revenues		2.50%
Loss contingency, after-tax earnings impact per share (in dollars per share)	$ 0.07

FAIR VALUE OF FINANCIAL INSTR_3

FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	$ 155,570	$ 155,570
Rate Reduction Bonds	432,097	453,702
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	155,600	155,600
Long-Term Debt	20,849,200	18,216,700
Rate Reduction Bonds	475,300	496,900
Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	146,900	166,300
Long-Term Debt	19,531,400	19,636,300
Rate Reduction Bonds	465,000	543,300
CL&P
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	116,200	116,200
CL&P | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	116,200	116,200
Long-Term Debt	4,215,900	4,215,400
Rate Reduction Bonds	0	0
CL&P | Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	107,200	122,300
Long-Term Debt	4,053,300	4,848,900
Rate Reduction Bonds	0	0
NSTAR Electric
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	43,000	43,000
NSTAR Electric | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	43,000	43,000
Long-Term Debt	4,429,700	3,985,400
Rate Reduction Bonds	0	0
NSTAR Electric | Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	39,700	44,000
Long-Term Debt	4,295,600	4,453,500
Rate Reduction Bonds	0	0
PSNH
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Rate Reduction Bonds	432,097	453,702
PSNH | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	0	0
Long-Term Debt	1,164,200	1,163,800
Rate Reduction Bonds	475,300	496,900
PSNH | Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	0	0
Long-Term Debt	1,027,200	1,220,600
Rate Reduction Bonds	$ 465,000	$ 543,300

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
AOCI Attributable to Parent [Roll Forward]
OCI Before Reclassifications					$ (3,800)	$ (2,900)
Amounts Reclassified from AOCI					3,200	5,000
Net OCI	$ (1,293)	$ 704	$ 881	$ 1,188	(589)	2,069
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent [Roll Forward]
Beginning balance		(42,300)		(76,400)	(42,300)	(76,400)
Net OCI	(1,293)	704	881	1,188
Ending balance	(42,900)		(74,300)		(42,900)	(74,300)
Qualified Cash Flow Hedging Instruments
AOCI Attributable to Parent [Roll Forward]
Beginning balance		(400)		(1,400)	(400)	(1,400)
OCI Before Reclassifications					0	0
Amounts Reclassified from AOCI					0	900
Net OCI					0	900
Ending balance	(400)		(500)		(400)	(500)
Unrealized Gains/(Losses) on Marketable Securities
AOCI Attributable to Parent [Roll Forward]
Beginning balance		400		1,100	400	1,100
OCI Before Reclassifications					(1,300)	(500)
Amounts Reclassified from AOCI					0	0
Net OCI					(1,300)	(500)
Ending balance	(900)		600		(900)	600
Defined Benefit Plans
AOCI Attributable to Parent [Roll Forward]
Beginning balance		$ (42,300)		$ (76,100)	(42,300)	(76,100)
OCI Before Reclassifications					(2,500)	(2,400)
Amounts Reclassified from AOCI					3,200	4,100
Net OCI					700	1,700
Ending balance	$ (41,600)		$ (74,400)		$ (41,600)	$ (74,400)

COMMON SHARES - Common Shares A

COMMON SHARES - Common Shares Authorized and Issued (Details) - $ / shares	Jun. 30, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Par value (in dollars per share)	$ 5
Authorized (in shares)	380,000,000	380,000,000
Issued (in shares)	359,211,206	357,818,402
CL&P
Class of Stock [Line Items]
Par value (in dollars per share)	$ 10
Authorized (in shares)	24,500,000	24,500,000
Issued (in shares)	6,035,205	6,035,205
NSTAR Electric
Class of Stock [Line Items]
Par value (in dollars per share)	$ 1
Authorized (in shares)	100,000,000	100,000,000
Issued (in shares)	200	200
PSNH
Class of Stock [Line Items]
Par value (in dollars per share)	$ 1
Authorized (in shares)	100,000,000	100,000,000
Issued (in shares)	301	301

COMMON SHARES - Narrative (Deta

COMMON SHARES - Narrative (Details) - USD ($) $ in Millions		3 Months Ended
	May 11, 2022	Jun. 30, 2022	Dec. 31, 2021
Equity [Abstract]
Sale of stock, issuance of common stock, maximum	$ 1,200
Sale of stock, consideration received on transaction		$ 126.3
Sale of stock, number of shares issued in transaction (in shares)		1,392,804
Treasury stock (in shares)		12,800,177	13,415,206
Common stock outstanding (in shares)		346,411,029	344,403,196

COMMON SHAREHOLDERS' EQUITY A_2

COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Equity [Abstract]
Dividends on preferred stock	$ 1,880	$ 1,880	$ 1,880	$ 1,880	$ 3,800	$ 3,800
Noncontrolling interest attributed to preferred stock of subsidiaries	$ 155,570				$ 155,570		$ 155,570

EARNINGS PER SHARE - Narrative

EARNINGS PER SHARE - Narrative (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Antidilutive share awards excluded from the EPS computation (in shares)	0	0	0	0

EARNINGS PER SHARE - Components

EARNINGS PER SHARE - Components of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net Income Attributable to Common Shareholders	$ 291,862	$ 264,520	$ 735,309	$ 630,663
Net Income Attributable to Common Shareholders	$ 291,900	$ 264,500	$ 735,300	$ 630,700
Weighted Average Common Shares Outstanding:
Basic (in shares)	345,893,714	343,844,626	345,525,030	343,761,435
Dilutive effect (in shares)	401,764	591,070	453,276	623,758
Diluted (in shares)	346,295,478	344,435,696	345,978,306	344,385,193
Basic EPS (in dollars per share)	$ 0.84	$ 0.77	$ 2.13	$ 1.83
Diluted EPS (in dollars per share)	$ 0.84	$ 0.77	$ 2.13	$ 1.83

REVENUES (Details)

REVENUES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Sep. 01, 2021	May 06, 2021
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 2,561,600	$ 2,142,900	$ 6,013,700	$ 4,915,500
Alternative Revenue Programs	8,200	(21,400)	23,900	30,300
Other Revenues	2,800	1,000	6,400	2,600
Operating Revenues	$ 2,572,641	$ 2,122,538	6,043,951	4,948,378
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty			(64,909)	28,583
Operating Lease, Income, Comprehensive Income [Extensible Enumeration]	Operating Revenues	Operating Revenues
Lease revenue	$ 1,000	$ 1,000	2,000	2,700
Unfavorable Regulatory Action
Disaggregation of Revenue [Line Items]
Loss contingency, estimate of possible earnings impact, non-compliance with performance standards							$ 28,400
CL&P
Disaggregation of Revenue [Line Items]
Operating Revenues	$ 1,035,682	$ 829,597	2,321,514	1,816,871
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty			(64,909)	28,583
Operating Lease, Income, Comprehensive Income [Extensible Enumeration]	Operating Revenues	Operating Revenues
Lease revenue	$ 200	$ 200	400	400
CL&P | Unfavorable Regulatory Action
Disaggregation of Revenue [Line Items]
Loss contingency, estimate of possible earnings impact, non-compliance with performance standards						$ 28,400
CL&P | Unfavorable Regulatory Action | Sales
Disaggregation of Revenue [Line Items]
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty			65,000
NSTAR Electric
Disaggregation of Revenue [Line Items]
Operating Revenues	$ 783,650	$ 687,375	1,646,825	1,424,418
Operating Lease, Income, Comprehensive Income [Extensible Enumeration]	Operating Revenues	Operating Revenues
Lease revenue	$ 600	$ 700	1,200	1,800
PSNH
Disaggregation of Revenue [Line Items]
Operating Revenues	$ 307,055	$ 278,849	646,482	572,284
Operating Lease, Income, Comprehensive Income [Extensible Enumeration]	Operating Revenues	Operating Revenues
Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 2,189,000	$ 1,904,300	5,046,800	4,381,400
Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,258,600	1,092,300	3,029,700	2,652,900
Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	802,000	698,500	1,734,400	1,478,500
Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	128,400	113,500	282,700	250,000
Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	93,200	91,300	199,200	183,800
Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	246,700	113,900	646,500	290,100
Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	25,900	33,400	56,300	60,200
(Reserve for)/Amortization of Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	6,800		64,900
Operating Segments | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,091,300	958,200	2,521,500	2,060,900
Alternative Revenue Programs	92,200	(1,100)	93,400	7,800
Other Revenues	200	(200)	300	100
Operating Segments | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	908,500	824,200	1,913,100	1,662,700
Alternative Revenue Programs	14,300	(15,300)	6,100	(1,500)
Other Revenues	1,600	700	3,600	1,800
Operating Segments | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	335,300	319,600	730,400	653,300
Alternative Revenue Programs	19,300	2,300	16,000	5,300
Other Revenues	700	500	1,600	500
Operating Segments | Total Retail Tariff Sales Revenues | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	817,400	684,900	1,692,200	1,481,700
Operating Segments | Total Retail Tariff Sales Revenues | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	685,300	629,900	1,455,300	1,285,100
Operating Segments | Total Retail Tariff Sales Revenues | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	255,800	243,900	548,700	501,200
Operating Segments | Residential | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	526,100	440,800	1,125,200	986,600
Operating Segments | Residential | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	326,900	304,700	731,500	667,100
Operating Segments | Residential | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	151,800	136,600	334,300	294,400
Operating Segments | Commercial | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	255,300	215,700	497,500	429,900
Operating Segments | Commercial | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	327,800	296,100	659,100	564,400
Operating Segments | Commercial | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	81,700	82,800	170,100	160,600
Operating Segments | Industrial | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	36,000	28,400	69,500	65,200
Operating Segments | Industrial | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	30,600	29,100	64,700	53,600
Operating Segments | Industrial | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	22,300	24,500	44,300	46,200
Operating Segments | Wholesale Transmission Revenues | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	115,800	195,700	325,000	384,600
Operating Segments | Wholesale Transmission Revenues | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	163,600	160,100	328,800	307,200
Operating Segments | Wholesale Transmission Revenues | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	55,100	61,100	126,900	119,400
Operating Segments | Wholesale Market Sales Revenues | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	143,400	68,100	423,400	177,800
Operating Segments | Wholesale Market Sales Revenues | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	47,800	18,900	105,600	43,400
Operating Segments | Wholesale Market Sales Revenues | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	21,400	10,200	49,100	25,100
Operating Segments | Other Revenues from Contracts with Customers | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	7,500	9,500	15,300	16,800
Operating Segments | Other Revenues from Contracts with Customers | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	11,800	15,300	23,400	27,000
Operating Segments | Other Revenues from Contracts with Customers | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	3,000	4,400	5,700	7,600
Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	7,200	0	65,600	0
Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Operating Segments | Reserves For Revenues Subject To Refund | CL&P | Unfavorable Regulatory Action
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers					$ 93,400
Other
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	335,700	330,000	719,300	673,000
Alternative Revenue Programs	0	0	0	0
Other Revenues	0	0	0	0
Operating Revenues	335,700	330,000	719,300	673,000
Other | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Other | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Other | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Other | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Other | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	25,100	20,300	49,600	39,500
Other | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Other | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	310,600	309,700	669,700	633,500
Other | (Reserve for)/Amortization of Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0		0
Eliminations
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(582,700)	(658,600)	(1,306,100)	(1,305,900)
Alternative Revenue Programs	(113,200)	(1,200)	(99,600)	1,000
Other Revenues	0	0	0	0
Operating Revenues	(695,900)	(659,800)	(1,405,700)	(1,304,900)
Eliminations | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(6,500)	(5,700)	(12,100)	(10,700)
Eliminations | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Eliminations | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(1,400)	(1,300)	(2,500)	(2,700)
Eliminations | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(5,100)	(4,400)	(9,600)	(8,000)
Eliminations | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(266,400)	(345,900)	(631,100)	(666,900)
Eliminations | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Eliminations | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(309,800)	(307,000)	(662,900)	(628,300)
Eliminations | (Reserve for)/Amortization of Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0		0
Eliminations | CL&P
Disaggregation of Revenue [Line Items]
Operating Revenues	(148,000)	(127,300)	(293,700)	(251,900)
Eliminations | NSTAR Electric
Disaggregation of Revenue [Line Items]
Operating Revenues	(140,700)	(122,200)	(276,000)	(238,600)
Eliminations | PSNH
Disaggregation of Revenue [Line Items]
Operating Revenues	(48,200)	(43,600)	(101,500)	(86,800)
Electric Distribution | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,995,300	1,680,500	4,374,100	3,556,800
Alternative Revenue Programs	6,800	(4,800)	11,500	18,200
Other Revenues	2,300	800	5,100	1,900
Operating Revenues	2,004,400	1,676,500	4,390,700	3,576,900
Electric Distribution | Operating Segments | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,757,800	1,558,200	3,695,000	3,267,100
Electric Distribution | Operating Segments | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,004,800	882,100	2,191,000	1,948,100
Electric Distribution | Operating Segments | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	664,100	594,100	1,325,500	1,154,000
Electric Distribution | Operating Segments | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	88,900	82,000	178,500	165,000
Electric Distribution | Operating Segments | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Electric Distribution | Operating Segments | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	212,600	97,200	578,100	246,300
Electric Distribution | Operating Segments | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	18,400	25,100	36,100	43,400
Electric Distribution | Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	6,500		64,900
Natural Gas Distribution | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	419,000	315,300	1,335,900	1,073,700
Alternative Revenue Programs	(3,000)	(3,400)	7,200	18,600
Other Revenues	200	(100)	700	0
Operating Revenues	416,200	311,800	1,343,800	1,092,300
Natural Gas Distribution | Operating Segments | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	384,600	298,600	1,267,000	1,029,300
Natural Gas Distribution | Operating Segments | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	218,500	174,200	775,300	641,100
Natural Gas Distribution | Operating Segments | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	122,600	89,600	380,100	297,400
Natural Gas Distribution | Operating Segments | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	43,500	34,800	111,600	90,800
Natural Gas Distribution | Operating Segments | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Natural Gas Distribution | Operating Segments | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	33,200	15,700	66,700	42,000
Natural Gas Distribution | Operating Segments | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,200	1,000	2,200	2,400
Natural Gas Distribution | Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0		0
Electric Transmission | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	338,400	420,300	788,400	818,000
Alternative Revenue Programs	119,000	(9,300)	104,000	(6,600)
Other Revenues	200	200	400	500
Operating Revenues	457,600	411,200	892,800	811,900
Electric Transmission | Operating Segments | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Electric Transmission | Operating Segments | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Electric Transmission | Operating Segments | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Electric Transmission | Operating Segments | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Electric Transmission | Operating Segments | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	334,500	416,900	780,700	811,200
Electric Transmission | Operating Segments | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Electric Transmission | Operating Segments | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	3,200	3,400	7,000	6,800
Electric Transmission | Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	700		700
Water Distribution | Operating Segments
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	55,900	55,400	102,100	99,900
Alternative Revenue Programs	(1,400)	(2,700)	800	(900)
Other Revenues	100	100	200	200
Operating Revenues	54,600	52,800	103,100	99,200
Water Distribution | Operating Segments | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	53,100	53,200	96,900	95,700
Water Distribution | Operating Segments | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	35,300	36,000	63,400	63,700
Water Distribution | Operating Segments | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	16,700	16,100	31,300	29,800
Water Distribution | Operating Segments | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,100	1,100	2,200	2,200
Water Distribution | Operating Segments | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0	0
Water Distribution | Operating Segments | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	900	1,000	1,700	1,800
Water Distribution | Operating Segments | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	2,300	$ 1,200	4,200	$ 2,400
Water Distribution | Operating Segments | (Reserve for)/Amortization of Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ (400)		$ (700)

SEGMENT INFORMATION - Narrative

SEGMENT INFORMATION - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($) segment
CL&P
Segment Reporting Information [Line Items]
Number of reportable segments	1
NSTAR Electric
Segment Reporting Information [Line Items]
Number of reportable segments	1
PSNH
Segment Reporting Information [Line Items]
Number of reportable segments	1
Affiliated Entity
Segment Reporting Information [Line Items]
Amount of natural gas transmission purchased | $	$ 77.7

SEGMENT INFORMATION - Summary o

SEGMENT INFORMATION - Summary of Segment Information and Segmented Total Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ 2,572,641	$ 2,122,538	$ 6,043,951	$ 4,948,378
Depreciation and Amortization	(364,600)	(280,200)	(891,000)	(659,000)
Other Operating Expenses	(1,752,400)	(1,390,700)	(4,034,400)	(3,252,200)
Operating Income	455,569	451,605	1,118,623	1,037,173
Interest Expense	(160,090)	(145,435)	(313,334)	(283,201)
Other Income, Net	93,861	46,619	165,422	80,820
Net Income Attributable to Common Shareholders	291,862	264,520	735,309	630,663
Cash Flows Used for Investments in Plant			1,549,081	1,423,223
Assets	49,916,240		49,916,240		$ 48,492,144
Other
Segment Reporting Information [Line Items]
Operating Revenues	335,700	330,000	719,300	673,000
Depreciation and Amortization	(33,200)	(28,400)	(63,400)	(55,700)
Other Operating Expenses	(279,400)	(285,700)	(610,900)	(585,200)
Operating Income	23,100	15,900	45,000	32,100
Interest Expense	(53,500)	(41,800)	(100,300)	(83,400)
Other Income, Net	354,300	309,200	850,200	733,400
Net Income Attributable to Common Shareholders	316,000	282,700	784,700	677,600
Cash Flows Used for Investments in Plant			122,700	109,900
Assets	23,833,900		23,833,900		22,674,700
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(695,900)	(659,800)	(1,405,700)	(1,304,900)
Depreciation and Amortization	1,600	1,100	3,300	2,100
Other Operating Expenses	692,100	660,300	1,400,800	1,305,200
Operating Income	(2,200)	1,600	(1,600)	2,400
Interest Expense	16,300	12,800	26,400	24,400
Other Income, Net	(335,400)	(304,800)	(828,500)	(725,800)
Net Income Attributable to Common Shareholders	(321,300)	(290,400)	(803,700)	(699,000)
Cash Flows Used for Investments in Plant			0	0
Assets	(23,038,200)		(23,038,200)		(21,738,600)
Electric Distribution | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues	2,004,400	1,676,500	4,390,700	3,576,900
Depreciation and Amortization	(198,100)	(132,300)	(549,700)	(354,300)
Other Operating Expenses	(1,636,100)	(1,360,300)	(3,481,700)	(2,890,800)
Operating Income	170,200	183,900	359,300	331,800
Interest Expense	(60,300)	(61,100)	(119,800)	(114,400)
Other Income, Net	53,000	29,900	100,500	50,600
Net Income Attributable to Common Shareholders	129,000	121,600	269,900	214,900
Cash Flows Used for Investments in Plant			541,800	510,400
Assets	26,238,100		26,238,100		25,411,200
Natural Gas Distribution | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues	416,200	311,800	1,343,800	1,092,300
Depreciation and Amortization	(39,100)	(34,600)	(91,100)	(80,300)
Other Operating Expenses	(360,700)	(257,700)	(1,018,000)	(793,600)
Operating Income	16,400	19,500	234,700	218,400
Interest Expense	(16,700)	(14,600)	(32,500)	(28,500)
Other Income, Net	10,600	4,600	20,800	8,500
Net Income Attributable to Common Shareholders	7,700	4,100	171,700	151,600
Cash Flows Used for Investments in Plant			275,400	305,900
Assets	7,351,400		7,351,400		7,215,900
Electric Transmission | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues	457,600	411,200	892,800	811,900
Depreciation and Amortization	(83,300)	(74,500)	(165,300)	(148,000)
Other Operating Expenses	(141,300)	(121,900)	(270,500)	(237,300)
Operating Income	233,000	214,800	457,000	426,600
Interest Expense	(37,500)	(32,600)	(70,600)	(65,300)
Other Income, Net	9,300	6,800	18,200	12,200
Net Income Attributable to Common Shareholders	151,500	137,600	300,000	273,000
Cash Flows Used for Investments in Plant			543,600	443,200
Assets	12,938,600		12,938,600		12,377,800
Water Distribution | Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues	54,600	52,800	103,100	99,200
Depreciation and Amortization	(12,500)	(11,500)	(24,800)	(22,800)
Other Operating Expenses	(27,000)	(25,400)	(54,100)	(50,500)
Operating Income	15,100	15,900	24,200	25,900
Interest Expense	(8,400)	(8,100)	(16,500)	(16,000)
Other Income, Net	2,100	900	4,200	1,900
Net Income Attributable to Common Shareholders	9,000	$ 8,900	12,700	12,600
Cash Flows Used for Investments in Plant			65,600	$ 53,800
Assets	$ 2,592,400		$ 2,592,400		$ 2,551,100