NSTAR Electric Company PFD 4.25% (NSARP) 10-Q6 Nov 242024 Q3 Quarterly reportFinancial data

Company Profile

COVER PAGE

COVER PAGE - shares	9 Months Ended
COVER PAGE - shares	Sep. 30, 2024	Oct. 31, 2024
Document And Entity [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
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)		366,402,087
Entity Central Index Key	0000072741
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
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	Sep. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and Cash Equivalents	$ 97,888	$ 53,873
Receivables, Net (net of allowance for uncollectible accounts)	1,562,525	1,431,531
Unbilled Revenues	169,218	225,325
Materials, Supplies, Natural Gas and REC Inventory	564,189	507,307
Regulatory Assets	2,024,897	1,674,196
Prepayments and Other Current Assets	414,190	355,762
Total Current Assets	4,832,907	4,247,994
Property, Plant and Equipment, Net	41,911,467	39,498,607
Deferred Debits and Other Assets:
Regulatory Assets	4,993,145	4,714,970
Goodwill	4,526,681	4,532,100
Investments in Unconsolidated Affiliates	166,418	660,473
Prepaid Pension and PBOP	1,158,142	1,028,207
Marketable Securities	339,117	337,814
Other Long-Term Assets	645,442	592,080
Total Deferred Debits and Other Assets	11,828,945	11,865,644
Total Assets	58,573,319	55,612,245
Current Liabilities:
Notes Payable	759,500	1,930,422
Long-Term Debt – Current Portion	1,442,483	824,847
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	1,562,164	1,869,187
Accrued Interest	308,101	260,577
Regulatory Liabilities	722,495	591,750
Other Current Liabilities	781,871	821,404
Total Current Liabilities	5,619,824	6,341,397
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,330,509	5,303,730
Regulatory Liabilities	4,124,761	4,022,923
Asset Retirement Obligations	510,025	505,844
Accrued Pension, SERP and PBOP	125,527	123,754
Other Long-Term Liabilities	1,367,201	1,029,238
Total Deferred Credits and Other Liabilities	11,458,023	10,985,489
Long-Term Debt	25,971,408	23,588,616
Rate Reduction Bonds	324,072	367,282
Noncontrolling Interest – Preferred Stock of Subsidiaries	155,568	155,569
Common Shareholders' Equity:
Common Shares	1,866,385	1,799,920
Capital Surplus, Paid In	9,263,434	8,460,876
Retained Earnings	4,118,654	4,142,515
Accumulated Other Comprehensive Loss	(28,205)	(33,737)
Treasury Stock	(175,844)	(195,682)
Common Shareholders' Equity	15,044,424	14,173,892
Commitments and Contingencies
Total Liabilities and Capitalization	$ 58,573,319	$ 55,612,245

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Allowance for uncollectible accounts	$ 574,671	$ 554,455

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF (LOSS)/INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Operating Revenues	$ 3,063,224	$ 2,791,482	$ 8,929,321	$ 9,216,467
Operating Expenses:
Purchased Power, Purchased Natural Gas and Transmission	917,858	1,168,599	2,995,245	4,232,912
Operations and Maintenance	510,439	500,711	1,437,826	1,382,563
Depreciation	366,145	329,528	1,060,650	962,477
Amortization	243,957	(143,979)	127,495	(438,460)
Energy Efficiency Programs	148,054	162,425	506,821	531,199
Taxes Other Than Income Taxes	264,371	243,645	740,414	704,989
Total Operating Expenses	2,450,824	2,260,929	6,868,451	7,375,680
Operating Income/(Loss)	612,400	530,553	2,060,870	1,840,787
Interest Expense	300,576	222,283	822,640	624,140
Losses on Offshore Wind Investments	464,019	0	464,019	401,000
Other Income, Net	112,555	79,123	318,870	262,980
(Loss)/Income Before Income Tax Expense	(39,640)	387,393	1,093,081	1,078,627
Income Tax Expense	76,537	45,850	348,309	226,743
Net (Loss)/Income	(116,177)	341,543	744,772	851,884
Net Income Attributable to Noncontrolling Interests	1,880	1,880	5,639	5,639
Net (Loss)/Income Attributable to Common Shareholders	$ (118,057)	$ 339,663	$ 739,133	$ 846,245
Basic (Loss)/Earnings Per Common Share (in dollars per share)	$ (0.33)	$ 0.97	$ 2.09	$ 2.42
Diluted (Loss)/Earnings Per Common Share (in dollars per share)	$ (0.33)	$ 0.97	$ 2.08	$ 2.42
Weighted Average Common Shares Outstanding:
Basic (in shares)	359,520,518	349,704,155	354,483,338	349,461,219
Diluted (in shares)	359,817,657	349,851,969	354,744,846	349,731,320

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS)/INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Statement of Comprehensive Income [Abstract]
Net (Loss)/Income	$ (116,177)	$ 341,543	$ 744,772	$ 851,884
Other Comprehensive Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	5	5	15	15
Changes in Unrealized Gains on Marketable Securities	0	0	0	1,254
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	1,371	8,076	5,517	14,130
Other Comprehensive Income, Net of Tax	1,376	8,081	5,532	15,399
Comprehensive Income Attributable to Noncontrolling Interests	(1,880)	(1,880)	(5,639)	(5,639)
Comprehensive (Loss)/Income Attributable to Common Shareholders	$ (116,681)	$ 347,744	$ 744,665	$ 861,644

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
Beginning balance (in shares) at Dec. 31, 2022		348,443,855
Balance as of Beginning of Period at Dec. 31, 2022	$ 15,473,158	$ 1,799,920	$ 8,401,731	$ 5,527,153	$ (39,421)	$ (216,225)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	493,039			493,039
Dividends on Common Stock	(235,354)			(235,354)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	(13,141)		(13,141)
Issuance of Treasury Shares (in shares)		364,227
Issuance of Treasury Shares	30,319		23,495			6,824
Other Comprehensive Income (Loss)	3,230				3,230
Ending balance (in shares) at Mar. 31, 2023		348,808,082
Balance as of End of Period at Mar. 31, 2023	15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	(209,401)
Beginning balance (in shares) at Dec. 31, 2022		348,443,855
Balance as of Beginning of Period at Dec. 31, 2022	15,473,158	$ 1,799,920	8,401,731	5,527,153	(39,421)	(216,225)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	851,884
Other Comprehensive Income (Loss)	15,399
Ending balance (in shares) at Sep. 30, 2023		349,275,775
Balance as of End of Period at Sep. 30, 2023	15,685,941	$ 1,799,920	8,443,820	5,666,861	(24,022)	(200,638)
Beginning balance (in shares) at Mar. 31, 2023		348,808,082
Balance as of Beginning of Period at Mar. 31, 2023	15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	(209,401)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	17,302			17,302
Dividends on Common Stock	(235,491)			(235,491)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	5,155		5,155
Issuance of Treasury Shares (in shares)		213,854
Issuance of Treasury Shares	15,553		11,546			4,007
Other Comprehensive Income (Loss)	4,088				4,088
Ending balance (in shares) at Jun. 30, 2023		349,021,936
Balance as of End of Period at Jun. 30, 2023	15,554,098	$ 1,799,920	8,428,786	5,562,889	(32,103)	(205,394)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	341,543			341,543
Dividends on Common Stock	(235,691)			(235,691)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	3,075		3,075
Issuance of Treasury Shares (in shares)		253,839
Issuance of Treasury Shares	16,715		11,959			4,756
Other Comprehensive Income (Loss)	8,081				8,081
Ending balance (in shares) at Sep. 30, 2023		349,275,775
Balance as of End of Period at Sep. 30, 2023	$ 15,685,941	$ 1,799,920	8,443,820	5,666,861	(24,022)	(200,638)
Beginning balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	(195,682)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	523,728			523,728
Dividends on Common Stock	(250,770)			(250,770)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		1,292,892
Issuance of Common Shares	76,437	$ 6,465	69,972
Long-Term Incentive Plan Activity	(22,405)		(22,405)
Issuance of Treasury Shares (in shares)		546,256
Issuance of Treasury Shares	40,425		30,190			10,235
Capital Stock Expense	(1,042)		(1,042)
Other Comprehensive Income (Loss)	5,203				5,203
Ending balance (in shares) at Mar. 31, 2024		351,379,414
Balance as of End of Period at Mar. 31, 2024	$ 14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	(185,447)
Beginning balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	(195,682)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	744,772
Other Comprehensive Income (Loss)	$ 5,532
Ending balance (in shares) at Sep. 30, 2024	363,891,973	363,891,973
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	9,263,434	4,118,654	(28,205)	(175,844)
Beginning balance (in shares) at Mar. 31, 2024		351,379,414
Balance as of Beginning of Period at Mar. 31, 2024	14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	(185,447)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	337,221			337,221
Dividends on Common Stock	(252,104)			(252,104)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		2,913,757
Issuance of Common Shares	174,657	$ 14,569	160,088
Long-Term Incentive Plan Activity	4,245		4,245
Issuance of Treasury Shares (in shares)		272,900
Issuance of Treasury Shares	15,896		10,783			5,113
Capital Stock Expense	(1,863)		(1,863)
Other Comprehensive Income (Loss)	(1,047)				(1,047)
Ending balance (in shares) at Jun. 30, 2024		354,566,071
Balance as of End of Period at Jun. 30, 2024	14,818,713	$ 1,820,954	8,710,844	4,496,830	(29,581)	(180,334)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(116,177)			(116,177)
Dividends on Common Stock	(260,119)			(260,119)
Dividends on Preferred Stock	(1,880)			(1,880)
Issuance of Common Shares (in shares)		9,086,269
Issuance of Common Shares	588,118	$ 45,431	542,687
Long-Term Incentive Plan Activity	4,456		4,456
Issuance of Treasury Shares (in shares)		239,633
Issuance of Treasury Shares	16,066		11,576			4,490
Capital Stock Expense	(6,129)		(6,129)
Other Comprehensive Income (Loss)	$ 1,376				1,376
Ending balance (in shares) at Sep. 30, 2024	363,891,973	363,891,973
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	$ 9,263,434	$ 4,118,654	$ (28,205)	$ (175,844)

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Dividends on Common Shares (in dollars per share)	$ 0.715	$ 0.715	$ 0.715	$ 0.675	$ 0.675	$ 0.675
Par value (in dollars per share)	$ 5	$ 5	$ 5

CONDENSED CONSOLIDATED STATEM_5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating Activities:
Net (Loss)/Income	$ 744,772	$ 851,884
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	1,060,650	962,477
Deferred Income Taxes	343,004	78,276
Uncollectible Expense	55,438	40,945
Pension, SERP and PBOP Income, Net	(54,663)	(64,311)
Pension Contributions	(5,000)	(5,000)
Regulatory (Under)/Over Recoveries, Net	(476,419)	(4,148)
Amortization	127,495	(438,460)
Cost of Removal Expenditures	(202,167)	(237,368)
Losses on Offshore Wind Investments	464,019	401,000
Other	(77,264)	(114,111)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(177,806)	6,738
Taxes Receivable/Accrued, Net	89,730	177,618
Accounts Payable	(231,898)	(385,741)
Other Current Assets and Liabilities, Net	(142,285)	(100,646)
Net Cash Flows Provided by/(Used In) Operating Activities	1,517,606	1,169,153
Investing Activities:
Investments in Property, Plant and Equipment	(3,291,850)	(3,125,617)
Proceeds from Sales of Marketable Securities	146,369	341,871
Purchases of Marketable Securities	(133,544)	(287,814)
Investments in Unconsolidated Affiliates	(929,651)	(887,365)
Proceeds from Sales of Offshore Wind Investments	862,713	0
Other Investing Activities	22,506	(57)
Net Cash Flows Used in Investing Activities	(3,323,457)	(3,958,982)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	830,178	0
Cash Dividends on Common Shares	(745,221)	(688,878)
Cash Dividends on Preferred Stock	(5,639)	(5,639)
(Decrease)/Increase in Notes Payable	(1,278,252)	87,600
Repayment of Rate Reduction Bonds	(43,210)	(43,210)
Issuance of Long-Term Debt	4,400,000	4,340,300
Retirement of Long-Term Debt	(1,260,148)	(1,203,000)
Other Financing Activities	(55,474)	(38,189)
Net Cash Flows Provided by Financing Activities	1,842,234	2,448,984
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	36,383	(340,845)
Cash and Restricted Cash - Beginning of Period	166,418	521,752
Cash, Cash Equivalents and Restricted Cash - End of Period	$ 202,801	$ 180,907

THE CONNECTICUT LIGHT AND POWER

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and Cash Equivalents	$ 97,900	$ 53,900
Receivables, Net (net of allowance for uncollectible accounts)	1,562,525	1,431,531
Unbilled Revenues	169,218	225,325
Materials, Supplies and REC Inventory	564,189	507,307
Regulatory Assets	2,024,897	1,674,196
Prepayments and Other Current Assets	414,190	355,762
Total Current Assets	4,832,907	4,247,994
Property, Plant and Equipment, Net	41,911,467	39,498,607
Deferred Debits and Other Assets:
Regulatory Assets	4,993,145	4,714,970
Prepaid Pension and PBOP	1,158,142	1,028,207
Other Long-Term Assets	645,442	592,080
Total Deferred Debits and Other Assets	11,828,945	11,865,644
Total Assets	58,573,319	55,612,245
Current Liabilities:
Long-Term Debt – Current Portion	1,442,483	824,847
Accounts Payable	1,562,164	1,869,187
Regulatory Liabilities	722,495	591,750
Other Current Liabilities	781,871	821,404
Total Current Liabilities	5,619,824	6,341,397
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,330,509	5,303,730
Regulatory Liabilities	4,124,761	4,022,923
Other Long-Term Liabilities	1,367,201	1,029,238
Total Deferred Credits and Other Liabilities	11,458,023	10,985,489
Long-Term Debt	25,971,408	23,588,616
Preferred Stock Not Subject to Mandatory Redemption	155,568	155,569
Common Shareholders' Equity:
Capital Surplus, Paid In	9,263,434	8,460,876
Retained Earnings	4,118,654	4,142,515
Accumulated Other Comprehensive (Loss)/Income	(28,205)	(33,737)
Common Shareholders' Equity	15,044,424	14,173,892
Commitments and Contingencies
Total Liabilities and Capitalization	58,573,319	55,612,245
The Connecticut Light and Power Company
Current Assets:
Cash and Cash Equivalents	10,116	10,213
Unbilled Revenues	48,111	57,403
Materials, Supplies and REC Inventory	207,276	156,467
Regulatory Assets	672,835	480,369
Prepayments	93,809	35,576
Prepayments and Other Current Assets	16,120	59,213
Total Current Assets	1,768,252	1,418,684
Property, Plant and Equipment, Net	12,829,760	12,340,192
Deferred Debits and Other Assets:
Regulatory Assets	1,753,887	1,662,778
Prepaid Pension and PBOP	144,480	129,801
Other Long-Term Assets	266,870	298,169
Total Deferred Debits and Other Assets	2,165,237	2,090,748
Total Assets	16,763,249	15,849,624
Current Liabilities:
Notes Payable to Eversource Parent	135,000	249,670
Long-Term Debt – Current Portion	139,845	0
Obligations to Third Party Suppliers	65,176	75,753
Regulatory Liabilities	139,455	102,239
Accrued Taxes	144,337	14,088
Derivative Liabilities	77,452	81,944
Other Current Liabilities	116,501	113,615
Total Current Liabilities	1,384,801	1,394,090
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	2,024,648	1,860,122
Regulatory Liabilities	1,370,302	1,315,928
Other Long-Term Liabilities	215,783	258,185
Total Deferred Credits and Other Liabilities	3,610,733	3,434,235
Long-Term Debt	5,110,791	4,814,429
Preferred Stock Not Subject to Mandatory Redemption	116,200	116,200
Common Shareholders' Equity:
Common Stock	60,352	60,352
Capital Surplus, Paid In	3,684,265	3,384,265
Retained Earnings	2,795,942	2,645,868
Accumulated Other Comprehensive (Loss)/Income	165	185
Common Shareholders' Equity	6,540,724	6,090,670
Commitments and Contingencies
Total Liabilities and Capitalization	16,763,249	15,849,624
The Connecticut Light and Power Company \| Nonrelated Party
Current Assets:
Receivables, Net (net of allowance for uncollectible accounts)	654,951	558,993
Current Liabilities:
Accounts Payable	450,154	622,055
The Connecticut Light and Power Company \| Related Party
Current Assets:
Receivables, Net (net of allowance for uncollectible accounts)	65,034	60,450
Current Liabilities:
Notes Payable to Eversource Parent	135,000	457,000
Accounts Payable	$ 116,881	134,726
Deferred Credits and Other Liabilities:
Long-Term Debt		$ 207,300

THE CONNECTICUT LIGHT AND POW_2

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Allowance for uncollectible accounts	$ 574,671	$ 554,455
The Connecticut Light and Power Company
Allowance for uncollectible accounts	$ 289,785	$ 296,030

THE CONNECTICUT LIGHT AND POW_3

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues	$ 3,063,224	$ 2,791,482	$ 8,929,321	$ 9,216,467
Operating Expenses:
Purchased Power and Transmission	917,858	1,168,599	2,995,245	4,232,912
Operations and Maintenance	510,439	500,711	1,437,826	1,382,563
Depreciation	366,145	329,528	1,060,650	962,477
Energy Efficiency Programs	148,054	162,425	506,821	531,199
Taxes Other Than Income Taxes	264,371	243,645	740,414	704,989
Total Operating Expenses	2,450,824	2,260,929	6,868,451	7,375,680
Operating Income/(Loss)	612,400	530,553	2,060,870	1,840,787
Interest Expense	300,576	222,283	822,640	624,140
Other Income, Net	112,555	79,123	318,870	262,980
(Loss)/Income Before Income Tax Expense	(39,640)	387,393	1,093,081	1,078,627
Income Tax Expense	76,537	45,850	348,309	226,743
The Connecticut Light and Power Company
Operating Revenues	1,345,253	1,190,096	3,431,167	3,563,150
Operating Expenses:
Purchased Power and Transmission	469,715	659,971	1,516,138	2,136,947
Operations and Maintenance	208,906	198,773	593,115	525,655
Depreciation	103,112	95,218	301,968	281,107
Amortization of Regulatory Assets/(Liabilities), Net	173,161	(113,165)	(73,583)	(425,402)
Energy Efficiency Programs	47,439	39,903	114,579	100,687
Taxes Other Than Income Taxes	115,807	107,037	316,000	303,222
Total Operating Expenses	1,118,140	987,737	2,768,217	2,922,216
Operating Income/(Loss)	227,113	202,359	662,950	640,934
Interest Expense	63,334	52,439	180,051	145,410
Other Income, Net	21,944	18,311	61,389	46,610
(Loss)/Income Before Income Tax Expense	185,723	168,231	544,288	542,134
Income Tax Expense	53,833	48,843	142,444	141,030
Net (Loss)/Income	$ 131,890	$ 119,388	$ 401,844	$ 401,104

THE CONNECTICUT LIGHT AND POW_4

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Comprehensive (Loss)/Income, Net of Tax:
Other Comprehensive (Loss)/Income, Net of Tax			$ 5,500	$ 15,400
Comprehensive (Loss)/Income Attributable to Common Shareholders	$ (116,681)	$ 347,744	744,665	861,644
The Connecticut Light and Power Company
Net (Loss)/Income	131,890	119,388	401,844	401,104
Other Comprehensive (Loss)/Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	(7)	(7)	(20)	(21)
Changes in Unrealized Gains on Marketable Securities	0	0	0	43
Other Comprehensive (Loss)/Income, Net of Tax	(7)	(7)	(20)	22
Comprehensive (Loss)/Income Attributable to Common Shareholders	$ 131,883	$ 119,381	$ 401,824	$ 401,126

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 Income/(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 Income/(Loss)
Beginning balance (in shares) at Dec. 31, 2022		348,443,855					6,035,205
Balance as of Beginning of Period at Dec. 31, 2022	$ 15,473,158	$ 1,799,920	$ 8,401,731	$ 5,527,153	$ (39,421)	$ 5,784,380	$ 60,352	$ 3,260,765	$ 2,463,094	$ 169
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						148,416			148,416
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(235,354)			(235,354)		(82,600)			(82,600)
Other Comprehensive Income (Loss)						36				36
Ending balance (in shares) at Mar. 31, 2023		348,808,082					6,035,205
Balance as of End of Period at Mar. 31, 2023	15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	5,848,842	$ 60,352	3,260,765	2,527,520	205
Beginning balance (in shares) at Dec. 31, 2022		348,443,855					6,035,205
Balance as of Beginning of Period at Dec. 31, 2022	15,473,158	$ 1,799,920	8,401,731	5,527,153	(39,421)	5,784,380	$ 60,352	3,260,765	2,463,094	169
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						401,104
Other Comprehensive Income (Loss)	15,400					22
Ending balance (in shares) at Sep. 30, 2023		349,275,775					6,035,205
Balance as of End of Period at Sep. 30, 2023	15,685,941	$ 1,799,920	8,443,820	5,666,861	(24,022)	6,057,036	$ 60,352	3,384,265	2,612,228	191
Beginning balance (in shares) at Mar. 31, 2023		348,808,082					6,035,205
Balance as of Beginning of Period at Mar. 31, 2023	15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	5,848,842	$ 60,352	3,260,765	2,527,520	205
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						133,300			133,300
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(235,491)			(235,491)		(82,600)			(82,600)
Other Comprehensive Income (Loss)						(7)				(7)
Ending balance (in shares) at Jun. 30, 2023		349,021,936					6,035,205
Balance as of End of Period at Jun. 30, 2023	15,554,098	$ 1,799,920	8,428,786	5,562,889	(32,103)	5,898,145	$ 60,352	3,260,765	2,576,830	198
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						119,388			119,388
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(235,691)			(235,691)		(82,600)			(82,600)
Capital Contributions from Eversource Parent						123,500		123,500
Other Comprehensive Income (Loss)						(7)				(7)
Ending balance (in shares) at Sep. 30, 2023		349,275,775					6,035,205
Balance as of End of Period at Sep. 30, 2023	$ 15,685,941	$ 1,799,920	8,443,820	5,666,861	(24,022)	6,057,036	$ 60,352	3,384,265	2,612,228	191
Beginning balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266					6,035,205
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	6,090,670	$ 60,352	3,384,265	2,645,868	185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						138,353			138,353
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(250,770)			(250,770)		(82,500)			(82,500)
Capital Contributions from Eversource Parent						100,000		100,000
Other Comprehensive Income (Loss)						(7)				(7)
Ending balance (in shares) at Mar. 31, 2024		351,379,414					6,035,205
Balance as of End of Period at Mar. 31, 2024	$ 14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	6,245,126	$ 60,352	3,484,265	2,700,331	178
Beginning balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266					6,035,205
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	6,090,670	$ 60,352	3,384,265	2,645,868	185
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						401,844
Other Comprehensive Income (Loss)	$ 5,500					(20)
Ending balance (in shares) at Sep. 30, 2024	363,891,973	363,891,973					6,035,205
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	9,263,434	4,118,654	(28,205)	6,540,724	$ 60,352	3,684,265	2,795,942	165
Beginning balance (in shares) at Mar. 31, 2024		351,379,414					6,035,205
Balance as of Beginning of Period at Mar. 31, 2024	14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	6,245,126	$ 60,352	3,484,265	2,700,331	178
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						131,601			131,601
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	(252,104)			(252,104)
Capital Contributions from Eversource Parent						100,000		100,000
Other Comprehensive Income (Loss)						(6)				(6)
Ending balance (in shares) at Jun. 30, 2024		354,566,071					6,035,205
Balance as of End of Period at Jun. 30, 2024	14,818,713	$ 1,820,954	8,710,844	4,496,830	(29,581)	6,475,331	$ 60,352	3,584,265	2,830,542	172
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						131,890			131,890
Dividends on Preferred Stock	(1,880)			(1,880)		(1,390)			(1,390)
Dividends on Common Stock	$ (260,119)			(260,119)		(165,100)			(165,100)
Capital Contributions from Eversource Parent						100,000		100,000
Other Comprehensive Income (Loss)						(7)				(7)
Ending balance (in shares) at Sep. 30, 2024	363,891,973	363,891,973					6,035,205
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	$ 9,263,434	$ 4,118,654	$ (28,205)	$ 6,540,724	$ 60,352	$ 3,684,265	$ 2,795,942	$ 165

THE CONNECTICUT LIGHT AND POW_6

THE CONNECTICUT LIGHT AND POWER COMPANY CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	$ 1,060,650	$ 962,477
Deferred Income Taxes	343,004	78,276
Uncollectible Expense	55,438	40,945
Pension, SERP, and PBOP Income, Net	(54,663)	(64,311)
Regulatory (Under)/Over Recoveries, Net	(476,419)	(4,148)
Cost of Removal Expenditures	(202,167)	(237,368)
Other	(77,264)	(114,111)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(177,806)	6,738
Taxes Receivable/Accrued, Net	89,730	177,618
Accounts Payable	(231,898)	(385,741)
Other Current Assets and Liabilities, Net	(142,285)	(100,646)
Net Cash Flows Provided by/(Used In) Operating Activities	1,517,606	1,169,153
Investing Activities:
Investments in Property, Plant and Equipment	(3,291,850)	(3,125,617)
Other Investing Activities	22,506	(57)
Net Cash Flows Used in Investing Activities	(3,323,457)	(3,958,982)
Financing Activities:
Cash Dividends on Common Stock	(745,221)	(688,878)
Cash Dividends on Preferred Stock	(5,639)	(5,639)
Issuance of Long-Term Debt	4,400,000	4,340,300
Retirement of Long-Term Debt	(1,260,148)	(1,203,000)
(Decrease)/Increase in Notes Payable to Eversource Parent	(1,278,252)	87,600
Other Financing Activities	(55,474)	(38,189)
Net Cash Flows Provided by Financing Activities	1,842,234	2,448,984
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	36,383	(340,845)
Cash and Restricted Cash - Beginning of Period	166,418	521,752
Cash, Cash Equivalents and Restricted Cash - End of Period	202,801	180,907
The Connecticut Light and Power Company
Operating Activities:
Net (Loss)/Income	401,844	401,104
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	301,968	281,107
Deferred Income Taxes	149,682	115,450
Uncollectible Expense	11,432	7,106
Pension, SERP, and PBOP Income, Net	(9,199)	(13,699)
Regulatory (Under)/Over Recoveries, Net	(80,598)	198,519
Amortization of Regulatory Assets/(Liabilities), Net	(73,583)	(425,402)
Cost of Removal Expenditures	(46,118)	(56,168)
Other	(41,726)	(21,415)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(134,987)	(113,592)
Taxes Receivable/Accrued, Net	167,119	107,774
Accounts Payable	(148,366)	(112,946)
Other Current Assets and Liabilities, Net	(107,303)	(47,800)
Net Cash Flows Provided by/(Used In) Operating Activities	390,165	320,038
Investing Activities:
Investments in Property, Plant and Equipment	(759,006)	(797,282)
Other Investing Activities	0	173
Net Cash Flows Used in Investing Activities	(759,006)	(797,109)
Financing Activities:
Cash Dividends on Common Stock	(247,600)	(247,800)
Cash Dividends on Preferred Stock	(4,169)	(4,169)
Capital Contributions from Eversource Parent	300,000	123,500
Issuance of Long-Term Debt	650,000	800,000
Retirement of Long-Term Debt	0	(400,000)
(Decrease)/Increase in Notes Payable to Eversource Parent	(322,000)	213,400
Other Financing Activities	(8,516)	(9,244)
Net Cash Flows Provided by Financing Activities	367,715	475,687
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	(1,126)	(1,384)
Cash and Restricted Cash - Beginning of Period	12,243	20,327
Cash, Cash Equivalents and Restricted Cash - End of Period	$ 11,117	$ 18,943

NSTAR ELECTRIC COMPANY AND SUBS

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and Cash Equivalents	$ 97,900	$ 53,900
Receivables, Net (net of allowance for uncollectible accounts)	1,562,525	1,431,531
Unbilled Revenues	169,218	225,325
Materials, Supplies and REC Inventory	564,189	507,307
Regulatory Assets	2,024,897	1,674,196
Prepayments and Other Current Assets	414,190	355,762
Total Current Assets	4,832,907	4,247,994
Property, Plant and Equipment, Net	41,911,467	39,498,607
Deferred Debits and Other Assets:
Regulatory Assets	4,993,145	4,714,970
Prepaid Pension and PBOP	1,158,142	1,028,207
Other Long-Term Assets	645,442	592,080
Total Deferred Debits and Other Assets	11,828,945	11,865,644
Total Assets	58,573,319	55,612,245
Current Liabilities:
Notes Payable	759,500	1,930,422
Accounts Payable	1,562,164	1,869,187
Regulatory Liabilities	722,495	591,750
Other Current Liabilities	781,871	821,404
Total Current Liabilities	5,619,824	6,341,397
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,330,509	5,303,730
Regulatory Liabilities	4,124,761	4,022,923
Other Long-Term Liabilities	1,367,201	1,029,238
Total Deferred Credits and Other Liabilities	11,458,023	10,985,489
Long-Term Debt	25,971,408	23,588,616
Preferred Stock Not Subject to Mandatory Redemption	155,568	155,569
Common Shareholders' Equity:
Capital Surplus, Paid In	9,263,434	8,460,876
Retained Earnings	4,118,654	4,142,515
Accumulated Other Comprehensive (Loss)/Income	(28,205)	(33,737)
Common Shareholders' Equity	15,044,424	14,173,892
Commitments and Contingencies
Total Liabilities and Capitalization	58,573,319	55,612,245
NSTAR Electric Company
Current Assets:
Cash and Cash Equivalents	4,467	6,740
Unbilled Revenues	50,430	49,897
Materials, Supplies and REC Inventory	182,243	173,770
Regulatory Assets	778,916	676,083
Prepayments and Other Current Assets	20,651	41,464
Total Current Assets	1,746,131	1,510,295
Property, Plant and Equipment, Net	13,627,246	12,753,787
Deferred Debits and Other Assets:
Regulatory Assets	1,270,882	1,281,836
Prepaid Pension and PBOP	674,903	608,617
Other Long-Term Assets	148,340	116,978
Total Deferred Debits and Other Assets	2,094,125	2,007,431
Total Assets	17,467,502	16,271,513
Current Liabilities:
Notes Payable	537,500	365,847
Obligations to Third Party Suppliers	179,142	139,823
Renewable Portfolio Standards Compliance Obligations	85,208	116,010
Regulatory Liabilities	468,756	368,070
Other Current Liabilities	116,287	84,688
Total Current Liabilities	2,024,824	1,818,756
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,938,528	1,849,613
Regulatory Liabilities	1,623,764	1,585,311
Other Long-Term Liabilities	361,480	327,388
Total Deferred Credits and Other Liabilities	3,923,772	3,762,312
Long-Term Debt	5,093,701	4,496,947
Preferred Stock Not Subject to Mandatory Redemption	43,000	43,000
Common Shareholders' Equity:
Common Stock	0	0
Capital Surplus, Paid In	3,388,842	3,013,842
Retained Earnings	2,993,371	3,136,612
Accumulated Other Comprehensive (Loss)/Income	(8)	44
Common Shareholders' Equity	6,382,205	6,150,498
Commitments and Contingencies
Total Liabilities and Capitalization	17,467,502	16,271,513
NSTAR Electric Company \| Nonrelated Party
Current Assets:
Receivables, Net (net of allowance for uncollectible accounts)	537,673	487,707
Current Liabilities:
Accounts Payable	500,606	599,696
NSTAR Electric Company \| Related Party
Current Assets:
Receivables, Net (net of allowance for uncollectible accounts)	171,751	74,634
Current Liabilities:
Accounts Payable	$ 137,325	$ 144,622

NSTAR ELECTRIC COMPANY AND SU_2

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Allowance for uncollectible accounts	$ 574,671	$ 554,455
NSTAR Electric
Allowance for uncollectible accounts	$ 118,302	$ 97,026

NSTAR ELECTRIC COMPANY AND SU_3

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues	$ 3,063,224	$ 2,791,482	$ 8,929,321	$ 9,216,467
Operating Expenses:
Purchased Power and Transmission	917,858	1,168,599	2,995,245	4,232,912
Operations and Maintenance	510,439	500,711	1,437,826	1,382,563
Depreciation	366,145	329,528	1,060,650	962,477
Energy Efficiency Programs	148,054	162,425	506,821	531,199
Taxes Other Than Income Taxes	264,371	243,645	740,414	704,989
Total Operating Expenses	2,450,824	2,260,929	6,868,451	7,375,680
Operating Income/(Loss)	612,400	530,553	2,060,870	1,840,787
Interest Expense	300,576	222,283	822,640	624,140
Other Income, Net	112,555	79,123	318,870	262,980
(Loss)/Income Before Income Tax Expense	(39,640)	387,393	1,093,081	1,078,627
Income Tax Expense	76,537	45,850	348,309	226,743
NSTAR Electric Company
Operating Revenues	1,077,523	953,531	2,870,206	2,728,782
Operating Expenses:
Purchased Power and Transmission	335,335	308,999	817,988	936,484
Operations and Maintenance	189,012	174,091	526,263	487,026
Depreciation	104,623	94,103	301,831	277,396
Amortization of Regulatory Assets/(Liabilities), Net	51,187	(6,462)	120,814	14,923
Energy Efficiency Programs	73,255	95,351	222,218	252,255
Taxes Other Than Income Taxes	74,758	68,449	205,818	188,191
Total Operating Expenses	828,170	734,531	2,194,932	2,156,275
Operating Income/(Loss)	249,353	219,000	675,274	572,507
Interest Expense	60,783	48,178	164,896	139,804
Other Income, Net	47,489	39,908	143,024	120,690
(Loss)/Income Before Income Tax Expense	236,059	210,730	653,402	553,393
Income Tax Expense	51,510	46,019	151,273	120,126
Net (Loss)/Income	$ 184,549	$ 164,711	$ 502,129	$ 433,267

NSTAR ELECTRIC COMPANY AND SU_4

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Comprehensive Income, Net of Tax:
Other Comprehensive (Loss)/Income, Net of Tax			$ 5,500	$ 15,400
Comprehensive (Loss)/Income Attributable to Common Shareholders	$ (116,681)	$ 347,744	744,665	861,644
NSTAR Electric Company
Net (Loss)/Income	184,549	164,711	502,129	433,267
Other Comprehensive Income, Net of Tax:
Changes in Funded Status of SERP Benefit Plan	(23)	(35)	(67)	(100)
Qualified Cash Flow Hedging Instruments	5	5	15	15
Changes in Unrealized Gains on Marketable Securities	0	0	0	12
Other Comprehensive (Loss)/Income, Net of Tax	(18)	(30)	(52)	(73)
Comprehensive (Loss)/Income Attributable to Common Shareholders	$ 184,531	$ 164,681	$ 502,077	$ 433,194

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 Income/(Loss)	NSTAR Electric	NSTAR Electric Common Stock	NSTAR Electric Capital Surplus, Paid In	NSTAR Electric Retained Earnings	NSTAR Electric Accumulated Other Comprehensive Income/(Loss)
Beginning balance (in shares) at Dec. 31, 2022		348,443,855					200
Balance as of Beginning of Period at Dec. 31, 2022	$ 15,473,158	$ 1,799,920	$ 8,401,731	$ 5,527,153	$ (39,421)	$ 5,700,670	$ 0	$ 2,778,942	$ 2,921,444	$ 284
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						133,813			133,813
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(235,354)			(235,354)		(327,400)			(327,400)
Capital Contributions from Eversource Parent						31,300		31,300
Other Comprehensive Loss						(16)				(16)
Ending balance (in shares) at Mar. 31, 2023		348,808,082					200
Balance as of End of Period at Mar. 31, 2023	15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	5,537,877	$ 0	2,810,242	2,727,367	268
Beginning balance (in shares) at Dec. 31, 2022		348,443,855					200
Balance as of Beginning of Period at Dec. 31, 2022	15,473,158	$ 1,799,920	8,401,731	5,527,153	(39,421)	5,700,670	$ 0	2,778,942	2,921,444	284
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						433,267
Other Comprehensive Loss	15,400					(73)
Ending balance (in shares) at Sep. 30, 2023		349,275,775					200
Balance as of End of Period at Sep. 30, 2023	15,685,941	$ 1,799,920	8,443,820	5,666,861	(24,022)	5,928,594	$ 0	2,902,542	3,025,841	211
Beginning balance (in shares) at Mar. 31, 2023		348,808,082					200
Balance as of Beginning of Period at Mar. 31, 2023	15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	5,537,877	$ 0	2,810,242	2,727,367	268
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						134,743			134,743
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(235,491)			(235,491)
Capital Contributions from Eversource Parent						81,000		81,000
Other Comprehensive Loss						(27)				(27)
Ending balance (in shares) at Jun. 30, 2023		349,021,936					200
Balance as of End of Period at Jun. 30, 2023	15,554,098	$ 1,799,920	8,428,786	5,562,889	(32,103)	5,753,103	$ 0	2,891,242	2,861,620	241
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						164,711			164,711
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(235,691)			(235,691)
Capital Contributions from Eversource Parent						11,300		11,300
Other Comprehensive Loss						(30)				(30)
Ending balance (in shares) at Sep. 30, 2023		349,275,775					200
Balance as of End of Period at Sep. 30, 2023	$ 15,685,941	$ 1,799,920	8,443,820	5,666,861	(24,022)	5,928,594	$ 0	2,902,542	3,025,841	211
Beginning balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266					200
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	6,150,498	$ 0	3,013,842	3,136,612	44
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						159,977			159,977
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(250,770)			(250,770)		(96,700)			(96,700)
Capital Contributions from Eversource Parent						300,000		300,000
Other Comprehensive Loss						(16)				(16)
Ending balance (in shares) at Mar. 31, 2024		351,379,414					200
Balance as of End of Period at Mar. 31, 2024	$ 14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	6,513,269	$ 0	3,313,842	3,199,399	28
Beginning balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266					200
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	6,150,498	$ 0	3,013,842	3,136,612	44
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						502,129
Other Comprehensive Loss	$ 5,500					(52)
Ending balance (in shares) at Sep. 30, 2024	363,891,973	363,891,973					200
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	9,263,434	4,118,654	(28,205)	6,382,205	$ 0	3,388,842	2,993,371	(8)
Beginning balance (in shares) at Mar. 31, 2024		351,379,414					200
Balance as of Beginning of Period at Mar. 31, 2024	14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	6,513,269	$ 0	3,313,842	3,199,399	28
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						157,603			157,603
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	(252,104)			(252,104)		(297,200)			(297,200)
Other Comprehensive Loss						(18)				(18)
Ending balance (in shares) at Jun. 30, 2024		354,566,071					200
Balance as of End of Period at Jun. 30, 2024	14,818,713	$ 1,820,954	8,710,844	4,496,830	(29,581)	6,373,164	$ 0	3,313,842	3,059,312	10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						184,549			184,549
Dividends on Preferred Stock	(1,880)			(1,880)		(490)			(490)
Dividends on Common Stock	$ (260,119)			(260,119)		(250,000)			(250,000)
Capital Contributions from Eversource Parent						75,000		75,000
Other Comprehensive Loss						(18)				(18)
Ending balance (in shares) at Sep. 30, 2024	363,891,973	363,891,973					200
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	$ 9,263,434	$ 4,118,654	$ (28,205)	$ 6,382,205	$ 0	$ 3,388,842	$ 2,993,371	$ (8)

NSTAR ELECTRIC COMPANY AND SU_6

NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	$ 1,060,650	$ 962,477
Deferred Income Taxes	343,004	78,276
Uncollectible Expense	55,438	40,945
Pension, SERP and PBOP Income, Net	(54,663)	(64,311)
Regulatory (Under)/Over Recoveries, Net	(476,419)	(4,148)
Cost of Removal Expenditures	(202,167)	(237,368)
Other	(77,264)	(114,111)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(177,806)	6,738
Taxes Receivable/Accrued, Net	89,730	177,618
Accounts Payable	(231,898)	(385,741)
Other Current Assets and Liabilities, Net	(142,285)	(100,646)
Net Cash Flows Provided by/(Used In) Operating Activities	1,517,606	1,169,153
Investing Activities:
Investments in Property, Plant and Equipment	(3,291,850)	(3,125,617)
Other Investing Activities	22,506	(57)
Net Cash Flows Used in Investing Activities	(3,323,457)	(3,958,982)
Financing Activities:
Cash Dividends on Common Stock	(745,221)	(688,878)
Cash Dividends on Preferred Stock	(5,639)	(5,639)
Issuance of Long-Term Debt	4,400,000	4,340,300
Other Financing Activities	(55,474)	(38,189)
Net Cash Flows Provided by Financing Activities	1,842,234	2,448,984
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	36,383	(340,845)
Cash and Restricted Cash - Beginning of Period	166,418	521,752
Cash, Cash Equivalents and Restricted Cash - End of Period	202,801	180,907
NSTAR Electric
Operating Activities:
Net (Loss)/Income	502,129	433,267
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	301,831	277,396
Deferred Income Taxes	55,795	72,220
Uncollectible Expense	27,746	12,988
Pension, SERP and PBOP Income, Net	(27,053)	(31,007)
Regulatory (Under)/Over Recoveries, Net	(155,869)	(103,903)
Amortization of Regulatory Assets/(Liabilities), Net	120,814	14,923
Cost of Removal Expenditures	(39,590)	(49,379)
Other	(25,224)	(11,174)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(152,656)	(76,989)
Taxes Receivable/Accrued, Net	33,883	61,773
Accounts Payable	(83,599)	(60,363)
Other Current Assets and Liabilities, Net	14,030	(10,752)
Net Cash Flows Provided by/(Used In) Operating Activities	572,237	529,000
Investing Activities:
Investments in Property, Plant and Equipment	(1,074,260)	(1,012,357)
Other Investing Activities	0	48
Net Cash Flows Used in Investing Activities	(1,074,260)	(1,012,309)
Financing Activities:
Cash Dividends on Common Stock	(643,900)	(327,400)
Cash Dividends on Preferred Stock	(1,470)	(1,470)
Issuance of Long-Term Debt	600,000	150,000
Capital Contributions from Eversource Parent	375,000	123,600
Increase in Notes Payable	171,653	209,500
Other Financing Activities	(6,077)	(1,368)
Net Cash Flows Provided by Financing Activities	495,206	152,862
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	(6,817)	(330,447)
Cash and Restricted Cash - Beginning of Period	22,785	345,293
Cash, Cash Equivalents and Restricted Cash - End of Period	$ 15,968	$ 14,846

PUBLIC SERVICE COMPANY OF NEW H

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and Cash Equivalents	$ 97,900	$ 53,900
Receivables, Net (net of allowance for uncollectible accounts)	1,562,525	1,431,531
Unbilled Revenues	169,218	225,325
Materials, Supplies and REC Inventory	564,189	507,307
Regulatory Assets	2,024,897	1,674,196
Prepayments and Other Current Assets	414,190	355,762
Total Current Assets	4,832,907	4,247,994
Property, Plant and Equipment, Net	41,911,467	39,498,607
Deferred Debits and Other Assets:
Regulatory Assets	4,993,145	4,714,970
Prepaid Pension and PBOP	1,158,142	1,028,207
Other Long-Term Assets	645,442	592,080
Total Deferred Debits and Other Assets	11,828,945	11,865,644
Total Assets	58,573,319	55,612,245
Current Liabilities:
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	1,562,164	1,869,187
Regulatory Liabilities	722,495	591,750
Accrued Interest	308,101	260,577
Other Current Liabilities	781,871	821,404
Total Current Liabilities	5,619,824	6,341,397
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,330,509	5,303,730
Regulatory Liabilities	4,124,761	4,022,923
Other Long-Term Liabilities	1,367,201	1,029,238
Total Deferred Credits and Other Liabilities	11,458,023	10,985,489
Long-Term Debt	25,971,408	23,588,616
Rate Reduction Bonds	324,072	367,282
Common Shareholders' Equity:
Capital Surplus, Paid In	9,263,434	8,460,876
Retained Earnings	4,118,654	4,142,515
Common Shareholders' Equity	15,044,424	14,173,892
Commitments and Contingencies
Total Liabilities and Capitalization	58,573,319	55,612,245
PSNH
Current Assets:
Cash and Cash Equivalents	4,673	240
Unbilled Revenues	43,421	55,012
Materials, Supplies and REC Inventory	82,223	77,066
Regulatory Assets	170,501	189,450
Special Deposits	18,876	31,586
Prepayments and Other Current Assets	5,466	45,635
Total Current Assets	538,074	569,479
Property, Plant and Equipment, Net	4,958,890	4,574,652
Deferred Debits and Other Assets:
Regulatory Assets	904,717	773,783
Prepaid Pension and PBOP	69,420	58,979
Other Long-Term Assets	18,959	16,558
Total Deferred Debits and Other Assets	993,096	849,320
Total Assets	6,490,060	5,993,451
Current Liabilities:
Notes Payable to Eversource Parent	89,300	233,000
Rate Reduction Bonds – Current Portion	43,210	43,210
Regulatory Liabilities	106,761	117,515
Accrued Interest	28,681	25,783
Other Current Liabilities	50,269	46,545
Total Current Liabilities	570,969	713,069
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	772,838	691,532
Regulatory Liabilities	393,847	393,574
Other Long-Term Liabilities	41,054	42,484
Total Deferred Credits and Other Liabilities	1,207,739	1,127,590
Long-Term Debt	1,731,764	1,431,591
Rate Reduction Bonds	324,072	367,282
Common Shareholders' Equity:
Common Stock	0	0
Capital Surplus, Paid In	1,898,134	1,698,134
Retained Earnings	757,382	655,785
Common Shareholders' Equity	2,655,516	2,353,919
Commitments and Contingencies
Total Liabilities and Capitalization	6,490,060	5,993,451
PSNH \| Nonrelated Party
Current Assets:
Receivables, Net (net of allowance for uncollectible accounts)	171,969	152,276
Current Liabilities:
Accounts Payable	210,478	205,744
PSNH \| Related Party
Current Assets:
Receivables, Net (net of allowance for uncollectible accounts)	40,945	18,214
Current Liabilities:
Notes Payable to Eversource Parent	89,300	233,000
Accounts Payable	$ 42,270	$ 41,272

PUBLIC SERVICE COMPANY OF NEW_2

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Allowance for uncollectible accounts	$ 574,671	$ 554,455
PSNH
Allowance for uncollectible accounts	$ 13,748	$ 14,322

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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Operating Revenues	$ 3,063,224	$ 2,791,482	$ 8,929,321	$ 9,216,467
Operating Expenses:
Purchased Power and Transmission	917,858	1,168,599	2,995,245	4,232,912
Operations and Maintenance	510,439	500,711	1,437,826	1,382,563
Depreciation	366,145	329,528	1,060,650	962,477
Energy Efficiency Programs	148,054	162,425	506,821	531,199
Taxes Other Than Income Taxes	264,371	243,645	740,414	704,989
Total Operating Expenses	2,450,824	2,260,929	6,868,451	7,375,680
Operating Income/(Loss)	612,400	530,553	2,060,870	1,840,787
Interest Expense	300,576	222,283	822,640	624,140
Other Income, Net	112,555	79,123	318,870	262,980
(Loss)/Income Before Income Tax Expense	(39,640)	387,393	1,093,081	1,078,627
Income Tax Expense	76,537	45,850	348,309	226,743
PSNH
Operating Revenues	342,027	353,074	955,453	1,123,300
Operating Expenses:
Purchased Power and Transmission	44,828	128,040	169,761	499,553
Operations and Maintenance	68,981	85,230	207,336	217,529
Depreciation	38,865	35,517	114,401	104,307
Amortization of Regulatory Assets/(Liabilities), Net	51,881	(9,963)	101,874	(35,234)
Energy Efficiency Programs	12,155	11,097	33,026	30,473
Taxes Other Than Income Taxes	24,041	25,748	71,821	73,384
Total Operating Expenses	240,751	275,669	698,219	890,012
Operating Income/(Loss)	101,276	77,405	257,234	233,288
Interest Expense	23,223	19,252	62,676	55,901
Other Income, Net	8,097	7,180	22,919	19,199
(Loss)/Income Before Income Tax Expense	86,150	65,333	217,477	196,586
Income Tax Expense	22,353	13,995	53,880	44,590
Net (Loss)/Income	$ 63,797	$ 51,338	$ 163,597	$ 151,996

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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Comprehensive (Loss)/Income, Net of Tax:
Other Comprehensive (Loss)/Income, Net of Tax			$ 5,500	$ 15,400
Comprehensive (Loss)/Income Attributable to Common Shareholders	$ (116,681)	$ 347,744	744,665	861,644
PSNH
Net (Loss)/Income	63,797	51,338	163,597	151,996
Other Comprehensive (Loss)/Income, Net of Tax:
Changes in Unrealized Gains on Marketable Securities	0	0	0	73
Other Comprehensive (Loss)/Income, Net of Tax	0	0	0	73
Comprehensive (Loss)/Income Attributable to Common Shareholders	$ 63,797	$ 51,338	$ 163,597	$ 152,069

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
Beginning balance (in shares) at Dec. 31, 2022		348,443,855					301
Balance as of Beginning of Period at Dec. 31, 2022	$ 15,473,158	$ 1,799,920	$ 8,401,731	$ 5,527,153	$ (39,421)	$ 1,870,187	$ 0	$ 1,298,134	$ 572,126	$ (73)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						40,296			40,296
Dividends on Common Stock	(235,354)			(235,354)		(28,000)			(28,000)
Other Comprehensive Income (Loss)						73				73
Ending balance (in shares) at Mar. 31, 2023		348,808,082					301
Balance as of End of Period at Mar. 31, 2023	15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	1,882,556	$ 0	1,298,134	584,422	0
Beginning balance (in shares) at Dec. 31, 2022		348,443,855					301
Balance as of Beginning of Period at Dec. 31, 2022	15,473,158	$ 1,799,920	8,401,731	5,527,153	(39,421)	1,870,187	$ 0	1,298,134	572,126	(73)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						151,996
Other Comprehensive Income (Loss)	15,400					73
Ending balance (in shares) at Sep. 30, 2023		349,275,775					301
Balance as of End of Period at Sep. 30, 2023	15,685,941	$ 1,799,920	8,443,820	5,666,861	(24,022)	2,110,256	$ 0	1,498,134	612,122	0
Beginning balance (in shares) at Mar. 31, 2023		348,808,082					301
Balance as of Beginning of Period at Mar. 31, 2023	15,749,371	$ 1,799,920	8,412,085	5,782,958	(36,191)	1,882,556	$ 0	1,298,134	584,422	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						60,362			60,362
Dividends on Common Stock	(235,491)			(235,491)		(28,000)			(28,000)
Capital Contributions from Eversource Parent						100,000		100,000
Ending balance (in shares) at Jun. 30, 2023		349,021,936					301
Balance as of End of Period at Jun. 30, 2023	15,554,098	$ 1,799,920	8,428,786	5,562,889	(32,103)	2,014,918	$ 0	1,398,134	616,784	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						51,338			51,338
Dividends on Common Stock	(235,691)			(235,691)		(56,000)			(56,000)
Capital Contributions from Eversource Parent						100,000		100,000
Other Comprehensive Income (Loss)						0
Ending balance (in shares) at Sep. 30, 2023		349,275,775					301
Balance as of End of Period at Sep. 30, 2023	$ 15,685,941	$ 1,799,920	8,443,820	5,666,861	(24,022)	2,110,256	$ 0	1,498,134	612,122	0
Beginning balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266					301
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	2,353,919	$ 0	1,698,134	655,785	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						48,356			48,356
Dividends on Common Stock	(250,770)			(250,770)
Capital Contributions from Eversource Parent						100,000		100,000
Ending balance (in shares) at Mar. 31, 2024		351,379,414					301
Balance as of End of Period at Mar. 31, 2024	$ 14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	2,502,275	$ 0	1,798,134	704,141	0
Beginning balance (in shares) at Dec. 31, 2023	349,540,266	349,540,266					301
Balance as of Beginning of Period at Dec. 31, 2023	$ 14,173,892	$ 1,799,920	8,460,876	4,142,515	(33,737)	2,353,919	$ 0	1,698,134	655,785	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						163,597
Other Comprehensive Income (Loss)	$ 5,500					0
Ending balance (in shares) at Sep. 30, 2024	363,891,973	363,891,973					301
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	9,263,434	4,118,654	(28,205)	2,655,516	$ 0	1,898,134	757,382	0
Beginning balance (in shares) at Mar. 31, 2024		351,379,414					301
Balance as of Beginning of Period at Mar. 31, 2024	14,543,588	$ 1,806,385	8,537,591	4,413,593	(28,534)	2,502,275	$ 0	1,798,134	704,141	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						51,444			51,444
Dividends on Common Stock	(252,104)			(252,104)		(62,000)			(62,000)
Ending balance (in shares) at Jun. 30, 2024		354,566,071					301
Balance as of End of Period at Jun. 30, 2024	14,818,713	$ 1,820,954	8,710,844	4,496,830	(29,581)	2,491,719	$ 0	1,798,134	693,585	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (Loss)/Income						63,797			63,797
Dividends on Common Stock	$ (260,119)			(260,119)
Capital Contributions from Eversource Parent						100,000		100,000
Other Comprehensive Income (Loss)						0
Ending balance (in shares) at Sep. 30, 2024	363,891,973	363,891,973					301
Balance as of End of Period at Sep. 30, 2024	$ 15,044,424	$ 1,866,385	$ 9,263,434	$ 4,118,654	$ (28,205)	$ 2,655,516	$ 0	$ 1,898,134	$ 757,382	$ 0

PUBLIC SERVICE COMPANY OF NEW_6

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	$ 1,060,650	$ 962,477
Deferred Income Taxes	343,004	78,276
Uncollectible Expense	55,438	40,945
Pension, SERP and PBOP Income, Net	(54,663)	(64,311)
Regulatory (Under)/Over Recoveries, Net	(476,419)	(4,148)
Cost of Removal Expenditures	(202,167)	(237,368)
Other	(77,264)	(114,111)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(177,806)	6,738
Taxes Receivable/Accrued, Net	89,730	177,618
Accounts Payable	(231,898)	(385,741)
Other Current Assets and Liabilities, Net	(142,285)	(100,646)
Net Cash Flows Provided by/(Used In) Operating Activities	1,517,606	1,169,153
Investing Activities:
Investments in Property, Plant and Equipment	(3,291,850)	(3,125,617)
Other Investing Activities	22,506	(57)
Net Cash Flows Used in Investing Activities	(3,323,457)	(3,958,982)
Financing Activities:
Cash Dividends on Common Shares	(745,221)	(688,878)
Issuance of Long-Term Debt	4,400,000	4,340,300
Repayment of Rate Reduction Bonds	(43,210)	(43,210)
(Decrease)/Increase in Notes Payable to Eversource Parent	(1,278,252)	87,600
Other Financing Activities	(55,474)	(38,189)
Net Cash Flows Provided by Financing Activities	1,842,234	2,448,984
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	36,383	(340,845)
Cash and Restricted Cash - Beginning of Period	166,418	521,752
Cash, Cash Equivalents and Restricted Cash - End of Period	202,801	180,907
PSNH
Operating Activities:
Net (Loss)/Income	163,597	151,996
Adjustments to Reconcile Net Income to Net Cash Flows Provided by/(Used In) Operating Activities:
Depreciation	114,401	104,307
Deferred Income Taxes	72,924	96,711
Uncollectible Expense	3,420	1,534
Pension, SERP and PBOP Income, Net	(6,614)	(7,841)
Regulatory (Under)/Over Recoveries, Net	(198,781)	(251,048)
Amortization of Regulatory Assets/(Liabilities), Net	101,874	(35,234)
Cost of Removal Expenditures	(29,473)	(29,448)
Other	335	11,479
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(36,877)	4,011
Taxes Receivable/Accrued, Net	28,721	27,797
Accounts Payable	(21,273)	(70,102)
Other Current Assets and Liabilities, Net	12,912	(17,092)
Net Cash Flows Provided by/(Used In) Operating Activities	205,166	(12,930)
Investing Activities:
Investments in Property, Plant and Equipment	(461,427)	(431,937)
Other Investing Activities	0	296
Net Cash Flows Used in Investing Activities	(461,427)	(431,641)
Financing Activities:
Cash Dividends on Common Shares	(62,000)	(112,000)
Capital Contributions from Eversource Parent	200,000	200,000
Issuance of Long-Term Debt	300,000	600,000
Repayment of Rate Reduction Bonds	(43,210)	(43,210)
(Decrease)/Increase in Notes Payable to Eversource Parent	(143,700)	(173,200)
Other Financing Activities	(3,140)	(8,524)
Net Cash Flows Provided by Financing Activities	247,950	463,066
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	(8,311)	18,495
Cash and Restricted Cash - Beginning of Period	35,004	36,812
Cash, Cash Equivalents and Restricted Cash - End of Period	$ 26,693	$ 55,307

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Sep. 30, 2024
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 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 twelve 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 2023 Form 10-K, which was filed with the SEC on February 14, 2024. 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 September 30, 2024 and December 31, 2023, and the results of operations, comprehensive income and common shareholders' equity for the three and nine months ended September 30, 2024 and 2023, and the cash flows for the nine months ended September 30, 2024 and 2023. The results of operations and comprehensive income for the three and nine months ended September 30, 2024 and 2023 and the cash flows for the nine months ended September 30, 2024 and 2023 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. In the third quarter of 2024, Eversource sold its 50 percent equity ownership interests in three offshore wind projects that had been accounted for under the equity method. See Note 1E, "Summary of Significant Accounting Policies – Investments in Unconsolidated Affiliates," for further information. 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). 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 economic 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 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 September 30, 2024 adequately reflected the collection risk and net realizable value for its receivables. 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 September 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 2024 Beginning Balance $ 389.1 $ 190.5 $ 579.6 $ 274.4 $ 34.2 $ 308.6 $ 45.9 $ 60.3 $ 106.2 $ 14.1 Uncollectible Expense — 29.2 29.2 — 5.1 5.1 — 15.7 15.7 1.2 Uncollectible Costs Deferred (1) 5.4 16.0 21.4 (8.8) 3.4 (5.4) 10.1 8.2 18.3 1.4 Write-Offs (16.8) (41.3) (58.1) (12.2) (7.4) (19.6) (1.9) (20.3) (22.2) (3.2) Recoveries Collected 0.1 2.5 2.6 0.1 1.0 1.1 — 0.3 0.3 0.2 Ending Balance $ 377.8 $ 196.9 $ 574.7 $ 253.5 $ 36.3 $ 289.8 $ 54.1 $ 64.2 $ 118.3 $ 13.7 Nine Months Ended 2024 Beginning Balance $ 366.8 $ 187.7 $ 554.5 $ 259.7 $ 36.3 $ 296.0 $ 43.6 $ 53.4 $ 97.0 $ 14.3 Uncollectible Expense — 55.4 55.4 — 11.4 11.4 — 27.7 27.7 3.4 Uncollectible Costs Deferred (1) 58.9 37.5 96.4 29.3 8.7 38.0 13.6 17.3 30.9 3.8 Write-Offs (48.5) (93.1) (141.6) (36.0) (23.4) (59.4) (3.1) (36.6) (39.7) (8.4) Recoveries Collected 0.6 9.4 10.0 0.5 3.3 3.8 — 2.4 2.4 0.6 Ending Balance $ 377.8 $ 196.9 $ 574.7 $ 253.5 $ 36.3 $ 289.8 $ 54.1 $ 64.2 $ 118.3 $ 13.7 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 (2) Three Months Ended 2023 Beginning Balance $ 338.2 $ 194.2 $ 532.4 $ 226.5 $ 36.3 $ 262.8 $ 45.6 $ 52.2 $ 97.8 $ 12.7 Uncollectible Expense — 16.8 16.8 — 2.4 2.4 — 5.2 5.2 2.0 Uncollectible Costs Deferred (1) 33.9 14.0 47.9 29.4 3.1 32.5 3.4 4.5 7.9 1.1 Write-Offs (17.5) (40.4) (57.9) (14.9) (7.6) (22.5) 0.1 (11.5) (11.4) (3.6) Recoveries Collected 0.2 3.3 3.5 0.2 0.9 1.1 — 1.3 1.3 0.2 Ending Balance $ 354.8 $ 187.9 $ 542.7 $ 241.2 $ 35.1 $ 276.3 $ 49.1 $ 51.7 $ 100.8 $ 12.4 Nine Months Ended 2023 Beginning Balance $ 284.4 $ 201.9 $ 486.3 $ 188.9 $ 36.4 $ 225.3 $ 43.7 $ 51.3 $ 95.0 $ 29.2 Uncollectible Expense — 40.9 40.9 — 7.1 7.1 — 13.0 13.0 1.5 Uncollectible Costs Deferred (1) 104.7 22.8 127.5 80.3 9.3 89.6 5.8 13.8 19.6 (11.1) Write-Offs (35.3) (88.5) (123.8) (29.0) (21.3) (50.3) (0.4) (30.4) (30.8) (7.8) Recoveries Collected 1.0 10.8 11.8 1.0 3.6 4.6 — 4.0 4.0 0.6 Ending Balance $ 354.8 $ 187.9 $ 542.7 $ 241.2 $ 35.1 $ 276.3 $ 49.1 $ 51.7 $ 100.8 $ 12.4 (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. The increases in the allowance for uncollectible hardship accounts at Eversource and CL&P in 2023 primarily relate to increased customer enrollment in disconnection prevention programs in Connecticut. (2) In connection with PSNH’s pole purchase agreement on May 1, 2023, the purchase price included the forgiveness of previously reserved receivables for reimbursement of operation and maintenance and vegetation management costs. 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 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 business combinations and asset 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 September 30, 2024 September 30, 2023 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Pension, SERP and PBOP Non-Service $ 31.6 $ 7.7 $ 13.9 $ 3.9 $ 28.5 $ 7.0 $ 12.9 $ 3.7 AFUDC Equity 22.7 5.4 13.0 1.5 21.0 5.2 12.5 1.6 Equity in Earnings of Unconsolidated Affiliates 17.1 — 0.2 — 2.7 — 0.1 — Investment (Loss)/Income (2.1) (0.9) (0.2) (0.3) 2.7 1.5 0.7 0.4 Interest Income 38.9 9.7 20.6 3.0 24.1 4.6 13.6 1.5 Other 4.4 — — — 0.1 — 0.1 — Total Other Income, Net $ 112.6 $ 21.9 $ 47.5 $ 8.1 $ 79.1 $ 18.3 $ 39.9 $ 7.2 For the Nine Months Ended September 30, 2024 September 30, 2023 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Pension, SERP and PBOP Non-Service $ 89.4 $ 21.4 $ 39.5 $ 11.2 $ 96.6 $ 24.9 $ 41.7 $ 11.8 AFUDC Equity 73.2 16.9 44.4 5.1 55.5 13.9 34.0 3.4 Equity in Earnings of Unconsolidated Affiliates (1) 48.1 — 0.6 — 11.5 — 0.3 — Investment (Loss)/Income (1.8) (1.7) 0.7 (0.5) (0.4) (0.2) 0.5 — Interest Income 106.0 24.8 57.8 7.1 68.6 8.0 44.0 3.6 Other (2) 4.0 — — — 31.2 — 0.2 0.4 Total Other Income, Net $ 318.9 $ 61.4 $ 143.0 $ 22.9 $ 263.0 $ 46.6 $ 120.7 $ 19.2 (1) Equity in Earnings of Unconsolidated Affiliates includes $23.4 million of pre-tax income recorded at Eversource in the second quarter of 2024 from Eversource’s wind equity method investment, North East Offshore, as a result of a vendor settlement agreement payment received by the joint venture. (2) Eversource’s equity method investment in a renewable energy fund was liquidated in March 2023. Liquidation proceeds in excess of the carrying value were recorded in 2023 within Other in the tables above. See Note 1E, "Summary of Significant Accounting Policies - Investments in Unconsolidated Affiliates," for further information. 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: Investment Balance (Millions of Dollars) Ownership Interest As of September 30, 2024 As of December 31, 2023 Offshore Wind Business 50% - 100% $ 22.2 $ 515.5 Natural Gas Pipeline - Algonquin Gas Transmission, LLC 15% 113.5 116.0 Other various 30.7 29.0 Total Investments in Unconsolidated Affiliates $ 166.4 $ 660.5 Offshore Wind Business: Eversource’s offshore wind business included 50 percent ownership interests in each of North East Offshore and South Fork Class B Member, LLC. In the third quarter of 2024, Eversource sold its interest in these entities, and in doing so, sold its interests in the Revolution Wind project, the South Fork Wind project, and the Sunrise Wind project. Eversource’s offshore wind business continues to hold a noncontrolling tax equity investment in South Fork Wind through a 100 percent ownership in South Fork Wind Holdings, LLC Class A interests. On May 25, 2023, Eversource announced that it had completed a strategic review of its offshore wind investments and determined that it would pursue the sale of its offshore wind investments. On September 7, 2023, Eversource completed the sale of its 50 percent interest in an uncommitted lease area consisting of approximately 175,000 developable acres located 25 miles off the south coast of Massachusetts to Ørsted for $625 million in an all-cash transaction. In September of 2023, Eversource made a contribution of $528 million to invest in a tax equity interest for South Fork Wind. South Fork Wind was restructured as a tax equity investment, with Eversource purchasing 100 percent ownership of a new Class A tax equity membership interest. This investment will result in Eversource receiving cash flow benefits from investment tax credits (ITC) and other future cash flow benefits as well. As of September 30, 2024, $459 million of expected investment tax credits and other expected tax benefits were reclassified from the South Fork Wind tax equity investment balance reported in Investments in Unconsolidated Affiliates as a reduction in current taxes payable of $54 million and a decrease in Accumulated Deferred Income Taxes of $405 million on the Eversource balance sheet as of September 30, 2024. As a result of these investment tax credits, Eversource expects lower federal income tax payments between 2024 through 2026. As of September 30, 2024, the tax equity interest in South Fork Wind totaled $22.2 million. On January 24, 2024, Eversource signed an agreement with Ørsted to sell Eversource’s 50 percent share of Sunrise Wind, subject to certain conditions and regulatory approvals. On April 18, 2024, Eversource and Ørsted executed an equity and asset purchase agreement for a gross purchase price of $230 million. The purchase price was subject to reduction for actual capital spending less than forecasted spending between signing the agreement in January and closing of the transaction. On July 9, 2024, Eversource completed the sale of its 50 percent ownership share of Sunrise Wind to Ørsted. In accordance with the equity and asset purchase agreement and after adjustment for the reduction in capital spending compared to forecasted amounts, adjusted proceeds totaled $152 million. Ørsted paid Eversource $118 million at the closing of the sale transaction, which was used to pay off parent company debt. Remaining proceeds of $34 million will be paid after onshore construction is completed and certain other construction milestones are achieved. The remaining expected proceeds have been recorded in Other Long-Term Assets on Eversource’s balance sheet as of September 30, 2024. Eversource recorded a pre-tax gain on the sale of Sunrise Wind of $377 million in the third quarter of 2024. With completion of the sale, Eversource will not have any ongoing financial obligations associated with Sunrise Wind. On February 13, 2024, Eversource executed an agreement to sell its 50 percent interests in the South Fork Wind and Revolution Wind projects to Global Infrastructure Partners (GIP) for an initial gross purchase price of approximately $1.1 billion. The initial purchase price was subject to adjustments based on, among other things, the progress, timing and the construction cost of Revolution Wind, including changes in actual versus forecasted capital spending between signing the agreement and closing of the transaction. On September 30, 2024, Eversource completed the sale of its 50 percent ownership share in the South Fork Wind and Revolution Wind projects to GIP for adjusted gross proceeds of $745 million, which were received at closing. Adjusted gross proceeds from the sale were reduced by approximately $375 million as compared with the previously estimated purchase price. This reduction reflects approximately $150 million resulting from lower capital spending between announcing the transaction and closing, and approximately $225 million related to the final terms of the sale transaction, primarily due to the delay of the commercial operations date of Revolution Wind. Proceeds from the transaction were used to pay off parent company debt. As part of the Revolution Wind and South Fork Wind sale, Eversource and GIP agreed to make certain post-closing purchase price adjustment payments, which could further impact the final purchase price. The post-closing purchase price adjustment payments include cost sharing obligations that provide Eversource will share equally with GIP in GIP’s funding obligations up to an effective cap of approximately $240 million of incremental capital expenditure overruns incurred during the construction phase for Revolution Wind, after which Eversource will have responsibility for GIP’s obligations for any additional capital expenditure overruns in excess of the capped amount. The purchase price is also subject to post-closing adjustments as a result of final project economics, which includes Eversource’s obligation to maintain GIP’s internal rate of return for each project as specified in the agreement. Post-closing purchase price adjustment payments will be made following the commercial operation of Revolution Wind. Upon the completion of both sale transactions, the total proceeds were compared to the carrying value of the investments, including an estimate of liability for post-closing adjustment payments to GIP, and Eversource recognized an aggregate after-tax loss on the sale of its offshore wind investments of $524 million in the third quarter of 2024. The aggregate after-tax loss is comprised of (1) the lower proceeds related to final terms of the sale transaction to GIP of approximately $225 million related to non-construction costs for the Revolution Wind and South Fork Wind projects, primarily due to a purchase price reduction of $150 million resulting from the delay of the commercial operations date of Revolution Wind, (2) recently identified forecasted construction costs as a result of a delay in the anticipated commercial operation date related to Revolution Wind of approximately $350 million, which includes an estimate for the anticipated post-closing adjustment to GIP related to Eversource’s expected cost overrun sharing obligation, and (3) approximately $326 million, which includes an estimate for the anticipated post-closing adjustment related to Eversource’s expected obligations to GIP as a result of final economics of the Revolution Wind and South Fork Wind projects and other future costs as well as a net $60 million increase in income tax expense including an increase in the valuation allowance for unused capital losses. These losses were partially offset by the $377 million gain on the sale of Sunrise Wind. Upon sale, Eversource recorded a liability of $365 million reflecting its best estimate of the future obligations under the GIP sale terms, which primarily include the expected cost overrun sharing obligation, expected obligation to maintain GIP’s internal rate of return for the Revolution Wind project, and obligation of other future costs. The majority of this liability is expected to be settled in 2026. The long-term portion of the liability of $350 million was recorded in Other Long-Term Liabilities, and the remainder was recorded in Other Current Liabilities on Eversource’s balance sheet as of September 30, 2024. Factors that could increase the post-closing adjustment payments owed to GIP include the ultimate cost of construction and extent of cost overruns for Revolution Wind, delays in constructing Revolution Wind, which would impact the economics associated with the purchase price adjustment, and Revolution Wind’s eligibility for federal investment tax credits at less than the value included in the purchase price. The purchase price included the sales value related to a 40 percent level of federal investment tax credits, 10 percent of which is the energy community ITC adder of approximately $170 million related to Revolution Wind. It is possible that new information or future developments could require a reassessment of the potential exposure of the estimated liability for the post-closing adjustment payments. As this information becomes available, Eversource will continue to assess the potential exposure and adjust the liability if needed. Incremental exposure of this estimated liability remains possible, but management cannot reasonably estimate a range of loss beyond the amount recorded at this time. Total net proceeds could also be adjusted for a benefit due to Eversource if there are lower operation costs or higher availability of the projects through the period that is four years following the commercial operation of Revolution Wind. South Fork Wind has achieved commercial operation and, as a result, Eversource does not expect any material cost sharing or other purchase price adjustment payments related to this project. Under the agreement with GIP, Eversource’s existing and certain additional credit support obligations for Revolution Wind are expected to roll off as the project completes construction. Under the agreement with Ørsted, Eversource’s existing credit support obligations for Sunrise Wind were either terminated or indemnified by Ørsted as a result of the sale. Eversource has entered into separate construction management agreements to manage Sunrise Wind’s and Revolution Wind’s onshore construction through completion. In this role, Eversource will be solely a service provider to Sunrise Wind and Revolution Wind. Impairments: In the second quarter of 2023, in connection with the process to divest its offshore wind business, Eversource identified indicators for impairment. In the impairment assessment, Eversource evaluated its investments and determined that the carrying value of the equity method offshore wind investments exceeded the fair value of the investments and that the decline in fair value was other-than-temporary. The completion of the strategic review in the second quarter of 2023 resulted in Eversource recording a pre-tax other-than-temporary impairment charge of $401 million ($331 million after-tax) to reflect the investment at estimated fair value based on the expected purchase price at that time. In the fourth quarter of 2023, Eversource recognized an additional pre-tax other-than-temporary impairment charge of $1.77 billion ($1.62 billion after-tax) in its offshore wind investments and established a new cost basis in the investments as of December 31, 2023. The impairment charges were non-cash charges and did not impact Eversource’s cash position. In the third quarter of 2024, Eversource sold its interest in its offshore wind investments. 2023 Liquidation of Renewable Energy Investment Fund: On March 21, 2023, Eversource’s equity method investment in a renewable energy investment fund was liquidated by the fund’s general partner in accordance with the partnership agreement. Proceeds received from the liquidation of $147.0 million were included in Investments in Unconsolidated Affiliates within investing activities on the statement of cash flows for the nine months ended September 30, 2023. Of this amount, $123.4 million was received in the first quarter of 2023, and $23.6 million was received from escrow in the second quarter of 2023. A portion of the proceeds was used to make a charitable contribution to the Eversource Energy Foundation (a related party) of $20.0 million in the first quarter of 2023. The liquidation benefit received in excess of the investment’s carrying value and the charitable contribution are included in Other Income, Net on the statement of income. 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 Nine Months Ended (Millions of Dollars) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 Eversource $ 59.3 $ 53.7 $ 157.2 $ 153.4 CL&P 56.0 50.2 139.6 132.2 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 September 30, 2024 As of September 30, 2023 Eversource $ 458.6 $ 462.4 CL&P 73.0 86.3 NSTAR Electric 164.8 135.9 PSNH 67.5 71.9 The following table reconciles cash and cash equivalents as reported on the balance sheets to the cash, cash equivalents and restricted cash balance as reported on the statements of cash flows: As of September 30, 2024 As of December 31, 2023 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Cash and Cash Equivalents as reported on the Balance Sheets $ 97.9 $ 10.1 $ 4.5 $ 4.7 $ 53.9 $ 10.2 $ 6.7 $ 0.2 Restricted cash included in: Special Deposits 66.5 1.0 11.5 18.9 81.5 2.0 16.1 31.6 Marketable Securities 21.5 — — — 13.7 — — — Other Long-Term Assets 16.9 — — 3.1 17.3 — — 3.2 Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows $ 202.8 $ 11.1 $ 16.0 $ 26.7 $ 166.4 $ 12.2 $ 22.8 $ 35.0 Special Deposits represent cash collections related to the PSNH RRB customer charges that are held in trust, required ISO-NE cash deposits, cash held in escrow accounts, and CYAPC and YAEC cash balances. Special Deposits are included in Current Assets on the balance sheets. Restricted cash included in Marketable Securities represents money market funds held in restricted trusts to fund CYAPC and YAEC's spent nuclear fuel storage obligations. Eversource’s restricted cash includes an Energy Relief Fund for energy efficiency and clean energy measures in the Merrimack Valley established under the terms of the EGMA 2020 settlement agreement. This restricted cash held in escrow accounts included $20.0 million recorded as short-term in Special Deposits as of both September 30, 2024 and December 31, 2023, and $13.8 million and $14.1 million recorded in Other Long-Term Assets on the balance sheets as of September 30, 2024 and December 31, 2023, respectively.

REGULATORY ACCOUNTING

REGULATORY ACCOUNTING	9 Months Ended
REGULATORY ACCOUNTING	Sep. 30, 2024
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 September 30, 2024 As of December 31, 2023 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Storm Costs, Net $ 2,077.2 $ 998.3 $ 626.3 $ 452.6 $ 1,785.9 $ 896.6 $ 609.1 $ 280.2 Regulatory Tracking Mechanisms 1,638.1 529.3 572.6 153.9 1,319.2 354.5 482.9 182.2 Benefit Costs 1,096.0 198.2 313.8 79.7 1,117.3 197.4 336.7 79.3 Income Taxes, Net 944.9 522.7 141.6 19.1 912.4 512.6 128.6 16.4 Securitized Stranded Costs 360.1 — — 360.1 392.5 — — 392.5 Goodwill-related 251.5 — 215.9 — 264.1 — 226.7 — Asset Retirement Obligations 147.0 40.5 76.8 5.0 137.9 38.5 72.3 4.7 Derivative Liabilities 72.6 72.6 — — 120.9 120.9 — — Other Regulatory Assets 430.6 65.1 102.8 4.8 339.0 22.7 101.6 8.0 Total Regulatory Assets 7,018.0 2,426.7 2,049.8 1,075.2 6,389.2 2,143.2 1,957.9 963.3 Less: Current Portion 2,024.9 672.8 778.9 170.5 1,674.2 480.4 676.1 189.5 Total Long-Term Regulatory Assets $ 4,993.1 $ 1,753.9 $ 1,270.9 $ 904.7 $ 4,715.0 $ 1,662.8 $ 1,281.8 $ 773.8 Regulatory Costs in Other Long-Term Assets: Eversource's regulated companies had $216.6 million (including $115.9 million for CL&P, $39.1 million for NSTAR Electric and $2.6 million for PSNH) and $241.7 million (including $166.7 million for CL&P, $21.9 million for NSTAR Electric and $1.2 million for PSNH) of additional regulatory costs not yet specifically approved as of September 30, 2024 and December 31, 2023, respectively, that were included in Other Long-Term Assets on the balance sheets. These amounts will be reclassified to Regulatory Assets upon approval by the applicable regulatory agency. 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 September 30, 2024 and December 31, 2023, these regulatory costs included $86.3 million (including $46.7 million for CL&P and $21.5 million for NSTAR Electric) and $82.1 million (including $64.0 million for CL&P and $7.3 million for NSTAR Electric), respectively, of deferred uncollectible hardship costs. Regulatory Liabilities: The components of regulatory liabilities were as follows: As of September 30, 2024 As of December 31, 2023 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH EDIT due to Tax Cuts and Jobs Act of 2017 $ 2,512.2 $ 960.1 $ 885.2 $ 333.7 $ 2,548.6 $ 969.2 $ 905.1 $ 339.3 Regulatory Tracking Mechanisms 789.8 188.2 446.9 99.8 668.3 154.0 347.2 114.4 Cost of Removal 740.4 197.5 448.1 21.1 666.6 157.9 420.9 16.2 Deferred Portion of Non-Service Income 409.3 58.8 202.8 41.1 354.0 49.9 175.9 36.6 AFUDC - Transmission 148.4 63.2 85.2 — 124.3 56.1 68.2 — Benefit Costs 34.9 0.4 10.4 — 51.0 0.6 22.2 — Other Regulatory Liabilities 212.3 41.6 14.0 4.9 201.9 30.4 13.9 4.6 Total Regulatory Liabilities 4,847.3 1,509.8 2,092.6 500.6 4,614.7 1,418.1 1,953.4 511.1 Less: Current Portion 722.5 139.5 468.8 106.8 591.8 102.2 368.1 117.5 Total Long-Term Regulatory Liabilities $ 4,124.8 $ 1,370.3 $ 1,623.8 $ 393.8 $ 4,022.9 $ 1,315.9 $ 1,585.3 $ 393.6

PROPERTY, PLANT AND EQUIPMENT A

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION	9 Months Ended
PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION	Sep. 30, 2024
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 September 30, 2024 As of December 31, 2023 (Millions of Dollars) Distribution - Electric $ 20,766.1 $ 19,656.5 Distribution - Natural Gas 8,569.3 8,155.3 Transmission - Electric 15,679.1 14,666.8 Distribution - Water 2,319.2 2,280.1 Solar 201.1 201.1 Utility 47,534.8 44,959.8 Other (1) 2,233.9 2,006.8 Property, Plant and Equipment, Gross 49,768.7 46,966.6 Less: Accumulated Depreciation Utility (10,137.9) (9,670.1) Other (1,003.5) (869.6) Total Accumulated Depreciation (11,141.4) (10,539.7) Property, Plant and Equipment, Net 38,627.3 36,426.9 Construction Work in Progress 3,284.2 3,071.7 Total Property, Plant and Equipment, Net $ 41,911.5 $ 39,498.6 As of September 30, 2024 As of December 31, 2023 (Millions of Dollars) CL&P NSTAR PSNH CL&P NSTAR PSNH Distribution - Electric $ 8,336.4 $ 9,558.1 $ 2,911.9 $ 7,897.1 $ 9,000.5 $ 2,799.2 Transmission - Electric 6,804.1 6,183.7 2,692.9 6,548.2 5,630.8 2,489.5 Solar — 201.1 — — 201.1 — Property, Plant and Equipment, Gross 15,140.5 15,942.9 5,604.8 14,445.3 14,832.4 5,288.7 Less: Accumulated Depreciation (2,874.1) (3,719.7) (1,014.2) (2,670.5) (3,585.9) (984.0) Property, Plant and Equipment, Net 12,266.4 12,223.2 4,590.6 11,774.8 11,246.5 4,304.7 Construction Work in Progress 563.4 1,404.0 368.3 565.4 1,507.3 270.0 Total Property, Plant and Equipment, Net $ 12,829.8 $ 13,627.2 $ 4,958.9 $ 12,340.2 $ 12,753.8 $ 4,574.7 (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	9 Months Ended
DERIVATIVE INSTRUMENTS	Sep. 30, 2024
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 derivative assets or 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 September 30, 2024 As of December 31, 2023 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 2 $ 15.5 $ (0.4) $ 15.1 $ 16.4 $ (0.5) $ 15.9 Long-Term Derivative Assets Level 2 2.5 (0.2) 2.3 13.6 (0.5) 13.1 Current Derivative Liabilities Level 2 (77.5) — (77.5) (81.9) — (81.9) Long-Term Derivative Liabilities Level 2 (12.5) — (12.5) (68.0) — (68.0) (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 September 30, 2024 and December 31, 2023 were 615 MW and 682 MW, respectively. 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 September 30, 2024 and 2023, there were losses of $0.5 million and $1.5 million, respectively. For the nine months ended September 30, 2024 and 2023, there were losses of $3.4 million and $1.6 million, respectively. These changes in fair value associated with CL&P’s derivative contracts are deferred in Regulatory Assets on the balance sheet. Fair Value Measurements of Derivative Instruments The fair value of derivative contracts utilizes both 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 capacity 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 were prepared by individuals with expertise in valuation techniques, pricing of energy-related products, and accounting requirements. All derivative contracts were classified as Level 2 in the fair value hierarchy as of both September 30, 2024 and December 31, 2023. 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 September 30, 2023 For the Nine Months Ended September 30, 2023 (Millions of Dollars) Derivatives, Net: Fair Value as of Beginning of Period $ (152.1) $ (181.8) Net Realized/Unrealized Losses Included in Regulatory Assets (1.5) (1.6) Settlements 17.0 46.8 Fair Value as of End of Period $ (136.6) $ (136.6)

MARKETABLE SECURITIES

MARKETABLE SECURITIES	9 Months Ended
MARKETABLE SECURITIES	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
MARKETABLE SECURITIES	MARKETABLE SECURITIES Eversource’s marketable securities 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. Eversource also holds trusts that are not subject to regulatory oversight by state or federal agencies that are primarily used to fund certain non-qualified executive benefits. The marketable securities within the non-qualified executive benefit trusts were sold in 2023. 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. CYAPC and YAEC’s spent nuclear fuel trusts are restricted and are classified in long-term Marketable Securities on the balance sheets. Equity Securities: Eversource's equity securities include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts, which had fair values of $166.3 million and $173.6 million as of September 30, 2024 and December 31, 2023, 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. Unrealized gains and losses on equity securities held in Eversource's trusts are recorded in Other Income, Net on the statements of income. The equity securities within Eversource’s non-qualified executive benefits trusts were sold during 2023 and resulted in a $1.1 million gain recorded in Other Income, Net for the nine months ended September 30, 2023. The fair value of equity securities held in Eversource’s trusts as of September 30, 2024 and December 31, 2023 were $4.0 million and $3.3 million, respectively. There were unrealized gains of $0.2 million for the three months ended September 30, 2024 and no unrealized gains or losses for the three months ended September 30, 2023 recorded in Other Income, Net, respectively, related to these equity securities. There were unrealized gains of $0.7 million and $0.3 million for the nine months ended September 30, 2024 and 2023 recorded in Other Income, Net, respectively, related to these equity securities. Available-for-Sale Debt Securities: The following is a summary of available-for-sale debt securities, which are held in CYAPC’s and YAEC’s spent nuclear fuel trusts: As of September 30, 2024 As of December 31, 2023 Eversource (Millions of Dollars) Amortized Cost Pre-Tax Pre-Tax Fair Value Amortized Cost Pre-Tax Pre-Tax Fair Value Debt Securities $ 176.9 $ 1.1 $ (5.1) $ 172.9 $ 169.5 $ 1.4 $ (6.6) $ 164.3 Unrealized gains and losses for available-for-sale debt securities included in the CYAPC and YAEC 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. The debt securities within Eversource’s non-qualified executive benefits trusts were sold during 2023. Any unrealized gains and losses on available-for-sale debt securities held in Eversource's trusts 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 were $1.2 million of realized losses recorded on securities sold for the nine months ended September 30, 2023 that were reclassified out of Accumulated Other Comprehensive Income and recorded in Other Income, Net. There were no credit losses for the three and nine months ended September 30, 2024 and 2023, and no allowance for credit losses as of September 30, 2024. 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. As of September 30, 2024, the contractual maturities of available-for-sale debt securities were as follows: Eversource (Millions of Dollars) Amortized Cost Fair Value Less than one year $ 24.7 $ 24.7 One to five years 33.7 33.9 Six to ten years 41.0 41.2 Greater than ten years 77.5 73.1 Total Debt Securities $ 176.9 $ 172.9 Realized Gains and Losses: Realized gains and losses are offset in long-term liabilities for CYAPC and YAEC and are recorded in Other Income, Net for Eversource's benefit trusts. Eversource utilizes the average cost basis method for the CYAPC and YAEC spent nuclear fuel trusts and the specific identification basis method for the Eversource non-qualified benefit 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 September 30, 2024 As of December 31, 2023 Level 1: Mutual Funds and Equities $ 170.3 $ 176.9 Money Market Funds 21.5 13.7 Total Level 1 $ 191.8 $ 190.6 Level 2: U.S. Government Issued Debt Securities (Agency and Treasury) $ 90.1 $ 90.1 Corporate Debt Securities 35.9 34.0 Asset-Backed Debt Securities 8.2 5.6 Municipal Bonds 7.4 9.8 Other Fixed Income Securities 9.8 11.1 Total Level 2 $ 151.4 $ 150.6 Total Marketable Securities $ 343.2 $ 341.2 U.S. government issued debt securities are valued using market approaches that incorporate transactions for the same or similar bonds and adjustments for yields and maturity dates. Corporate debt securities are valued using a market approach, utilizing recent trades of the same or similar instruments and also incorporating yield curves, credit spreads and specific bond terms and conditions. Asset-backed debt securities include collateralized mortgage obligations, commercial mortgage backed securities, and securities collateralized by auto loans, credit card loans or receivables. Asset-backed debt securities are valued using recent trades of similar instruments, prepayment assumptions, yield curves, issuance and maturity dates, and tranche information. Municipal bonds are valued using a market approach that incorporates reported trades and benchmark yields. Other fixed income securities are valued using pricing models, quoted prices of securities with similar characteristics, and discounted cash flows.

SHORT-TERM AND LONG-TERM DEBT

SHORT-TERM AND LONG-TERM DEBT	9 Months Ended
SHORT-TERM AND LONG-TERM DEBT	Sep. 30, 2024
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 11, 2029. 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 11, 2029, that 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 September 30, 2024 December 31, 2023 September 30, 2024 December 31, 2023 September 30, 2024 December 31, 2023 (Millions of Dollars) Eversource Parent Commercial Paper Program $ 322.0 $ 1,771.9 $ 1,678.0 $ 228.1 5.12 % 5.60 % NSTAR Electric Commercial Paper Program 537.5 365.8 112.5 284.2 4.94 % 5.40 % There were no borrowings outstanding on the revolving credit facilities as of September 30, 2024 or December 31, 2023. CL&P and PSNH have uncommitted line of credit agreements totaling $375 million and $250 million, respectively, all of which will expire in either May 2025, September 2025 or October 2025. There are no borrowings outstanding on either the CL&P or PSNH uncommitted line of credit agreements as of September 30, 2024. 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 CL&P long-term debt issuance in January 2024, $207.3 million of commercial paper borrowings under the Eversource parent commercial paper program were reclassified to Long-Term Debt on Eversource parent’s balance sheet as of December 31, 2023. As a result of the EGMA long-term debt issuance in October 2024, $100.0 million of commercial paper borrowings under the Eversource parent commercial paper program were reclassified to Long-Term Debt on Eversource parent’s balance sheet as of September 30, 2024. 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 September 30, 2024, there were intercompany loans from Eversource parent to CL&P of $135.0 million and to PSNH of $89.3 million. As of December 31, 2023, there were intercompany loans from Eversource parent to CL&P of $457.0 million and to PSNH of $233.0 million. Eversource parent charges interest on these intercompany loans at the same weighted-average interest rate as its commercial paper program. 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, as these intercompany borrowings are outstanding for no more than 364 days at one time. As a result of the CL&P long-term debt issuance in January 2024, $207.3 million of CL&P’s intercompany borrowings were reclassified to Long-Term Debt on CL&P’s balance sheet as of December 31, 2023. 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. Long-Term Debt Issuance Authorizations: On February 8, 2024, the NHPUC approved PSNH’s request for authorization to issue up to $300 million in long-term debt through December 31, 2024. On May 1, 2024, the DPU approved NSTAR Electric’s request for authorization to issue up to $2.4 billion in long-term debt through December 31, 2026. On July 24, 2024, PURA approved CL&P’s request for authorization to issue up to $1.0 billion in long-term debt through December 31, 2025. On August 12, 2024 the DPU approved EGMA’s request for authorization to issue up to $325 million in long-term debt through December 31, 2026. Long-Term Debt Issuances and Repayments: The following table summarizes long-term debt issuances and repayments: (Millions of Dollars) Interest Rate Issuance/(Repayment) Issue Date or Repayment Date Maturity Date Use of Proceeds for Issuance/ CL&P Series A First Mortgage Bonds 4.65 % $ 350.0 January 2024 January 2029 Repaid short-term debt, paid capital expenditures and working capital CL&P Series B First Mortgage Bonds 4.95 % 300.0 August 2024 August 2034 Repaid Series D Bonds, repaid short-term debt, and working capital CL&P Series D First Mortgage Bonds 7.875 % (139.8) October 2024 October 2024 Paid at maturity NSTAR Electric Debentures 5.40 % 600.0 May 2024 June 2034 Repaid short-term debt, paid capital expenditures and working capital PSNH Series X First Mortgage Bonds 5.35 % 300.0 April 2024 October 2033 Repaid short-term debt, paid capital expenditures and working capital Eversource Parent Series DD Senior Notes 5.00 % 350.0 January 2024 January 2027 Repaid short-term debt Eversource Parent Series EE Senior Notes 5.50 % 650.0 January 2024 January 2034 Repaid short-term debt Eversource Parent Series FF Senior Notes 5.85 % 700.0 April 2024 April 2031 Repaid Series X Senior Notes and Aquarion’s 2014 Senior Notes at maturity and short-term debt Eversource Parent Series GG Senior Notes 5.95 % 700.0 April 2024 July 2034 Repaid Series X Senior Notes and Aquarion’s 2014 Senior Notes at maturity and short-term debt Eversource Parent Series X Senior Notes 4.20 % (900.0) June 2024 June 2024 Paid at maturity Eversource Parent Series L Senior Notes 2.90 % (450.0) October 2024 October 2024 Paid at maturity NSTAR Gas Series W First Mortgage Bonds 5.29 % 160.0 June 2024 June 2029 Repaid short-term debt, paid capital expenditures and general corporate purchases NSTAR Gas Series X First Mortgage Bonds 5.48 % 40.0 June 2024 June 2034 Repaid short-term debt, paid capital expenditures and general corporate purchases Yankee Gas Series W First Mortgage Bonds 5.50 % 90.0 July 2024 July 2029 Repaid short-term debt, paid capital expenditures, working capital and repaid Series P bonds at maturity Yankee Gas Series X First Mortgage Bonds 5.74 % 90.0 July 2024 July 2034 Repaid short-term debt, paid capital expenditures, working capital and repaid Series P bonds at maturity Yankee Gas Series P First Mortgage Bonds 2.23 % (100.0) October 2024 October 2024 Paid at maturity EGMA Series E First Mortgage Bonds 5.17 % 100.0 October 2024 November 2034 Refinanced existing indebtedness, paid capital expenditures and general corporate purchases Aquarion Senior Notes 4.00 % (360.0) August 2024 August 2024 Paid at maturity Aquarion Water Company of Connecticut Senior Notes 5.57 % 70.0 August 2024 September 2034 Repaid short-term debt, paid capital expenditures and general corporate purchases

RATE REDUCTION BONDS AND VARIAB

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES	9 Months Ended
RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES	Sep. 30, 2024
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 September 30, 2024 As of December 31, 2023 Restricted Cash - Current Portion (included in Special Deposits) $ 17.3 $ 30.0 Restricted Cash - Long-Term Portion (included in Other Long-Term Assets) 3.1 3.2 Securitized Stranded Cost (included in Regulatory Assets) 360.1 392.5 Other Regulatory Liabilities (included in Regulatory Liabilities) 7.5 5.3 Accrued Interest (included in Other Current Liabilities) 2.3 6.3 Rate Reduction Bonds - Current Portion 43.2 43.2 Rate Reduction Bonds - Long-Term Portion 324.1 367.3 (Millions of Dollars) PSNH Income Statements: For the Three Months Ended For the Nine Months Ended September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 Amortization of RRB Principal (included in Amortization of $ 10.8 $ 10.8 $ 32.4 $ 32.4 Interest Expense on RRB Principal (included in Interest Expense) 3.5 3.9 10.8 11.9

PENSION BENEFITS AND POSTRETIRE

PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION	9 Months Ended
	Sep. 30, 2024
Postemployment Benefits [Abstract]
PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION	PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION Eversource 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 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 September 30, 2024 For the Three Months Ended September 30, 2024 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Service Cost $ 11.2 $ 3.3 $ 1.9 $ 1.1 $ 1.7 $ 0.3 $ 0.3 $ 0.1 Interest Cost 62.7 12.6 12.8 6.7 8.0 1.4 2.2 0.9 Expected Return on Plan Assets (115.7) (23.4) (28.0) (12.2) (20.3) (2.4) (9.9) (1.4) Actuarial Loss/(Gain) 22.0 3.2 6.4 1.3 (0.1) — — — Prior Service Cost/(Credit) 0.3 — 0.1 — (5.4) 0.3 (4.2) 0.1 Total Net Periodic Benefit Plan Income $ (19.5) $ (4.3) $ (6.8) $ (3.1) $ (16.1) $ (0.4) $ (11.6) $ (0.3) Intercompany Income Allocations N/A $ (0.6) $ (0.6) $ (0.2) N/A $ (0.6) $ (0.6) $ (0.2) Pension and SERP PBOP For the Nine Months Ended September 30, 2024 For the Nine Months Ended September 30, 2024 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 33.2 $ 9.5 $ 5.9 $ 3.2 $ 5.2 $ 0.9 $ 0.9 $ 0.4 Interest Cost 187.4 37.7 38.7 20.1 24.0 4.2 6.6 2.6 Expected Return on Plan Assets (347.0) (70.2) (84.3) (36.6) (61.0) (7.1) (29.7) (4.2) Actuarial Loss/(Gain) 63.9 8.9 19.2 3.7 (0.3) — — — Prior Service Cost/(Credit) 0.9 — 0.3 — (16.2) 0.8 (12.7) 0.3 Settlement Loss 4.3 — — — — — — — Total Net Periodic Benefit Plan Income $ (57.3) $ (14.1) $ (20.2) $ (9.6) $ (48.3) $ (1.2) $ (34.9) $ (0.9) Intercompany Income Allocations N/A $ (0.9) $ (0.8) $ (0.3) N/A $ (1.7) $ (1.9) $ (0.6) Pension and SERP PBOP For the Three Months Ended September 30, 2023 For the Three Months Ended September 30, 2023 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 10.7 $ 3.1 $ 1.9 $ 1.0 $ 1.9 $ 0.4 $ 0.3 $ 0.2 Interest Cost 63.4 12.6 13.5 6.8 8.5 1.5 2.3 0.9 Expected Return on Plan Assets (116.3) (23.5) (28.4) (12.3) (19.3) (2.3) (9.2) (1.4) Actuarial Loss 10.9 0.5 4.0 0.4 — — — — Prior Service Cost/(Credit) 0.3 — 0.1 — (5.4) 0.2 (4.2) 0.1 Settlement Loss 8.7 — — — — — — — Total Net Periodic Benefit Plan Income $ (22.3) $ (7.3) $ (8.9) $ (4.1) $ (14.3) $ (0.2) $ (10.8) $ (0.2) Intercompany Expense/(Income) Allocations N/A $ 0.8 $ 0.9 $ 0.3 N/A $ (0.5) $ (0.5) $ (0.2) Pension and SERP PBOP For the Nine Months Ended September 30, 2023 For the Nine Months Ended September 30, 2023 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 32.4 $ 9.2 $ 5.9 $ 3.2 $ 5.7 $ 1.0 $ 0.9 $ 0.6 Interest Cost 190.6 37.9 40.5 20.4 25.4 4.6 6.9 2.7 Expected Return on Plan Assets (348.7) (70.6) (85.3) (37.1) (57.9) (7.0) (27.7) (4.2) Actuarial Loss 35.0 1.9 12.9 1.2 — — — — Prior Service Cost/(Credit) 0.9 — 0.3 — (16.2) 0.8 (12.7) 0.3 Settlement Loss 12.4 — — — — — — — Total Net Periodic Benefit Plan Income $ (77.4) $ (21.6) $ (25.7) $ (12.3) $ (43.0) $ (0.6) $ (32.6) $ (0.6) Intercompany Income Allocations N/A $ (1.8) $ (1.2) $ (0.3) N/A $ (1.4) $ (1.6) $ (0.5) In August 2024, Eversource communicated to its employees participating in the Eversource 401k Plan’s enhanced defined contribution feature (referred to as K-Vantage) that effective January 1, 2025 (subject to union negotiations), a Cash Balance Pension Plan will be established, which will replace employer K-Vantage contributions. Eversource will transfer into the Cash Balance Pension Plan employees who are currently participating in the K-Vantage plan and will credit employees a set percentage of an employee’s eligible pay based on age and years of service on the employee’s behalf. This benefit will be a new, additional obligation of the existing Pension Plan and will be funded through the existing assets of the Eversource Pension Plan. This plan amendment did not require a remeasurement in 2024 and the liability will begin to accrue benefits upon the effective date of January 1, 2025.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Sep. 30, 2024
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 September 30, 2024 As of December 31, 2023 Number of Sites Reserve Number of Sites Reserve Eversource 65 $ 130.5 65 $ 128.2 CL&P 15 13.7 16 13.8 NSTAR Electric 13 6.7 12 5.4 PSNH 8 6.4 8 7.6 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. Eversource’s reserve balances related to these former MGP sites were $117.9 million and $117.1 million as of September 30, 2024 and December 31, 2023, 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 2023 Form 10-K. Renewable Energy : Renewable energy contracts include non-cancelable commitments under contracts of CL&P for the purchase of energy and capacity from renewable energy facilities. The table now includes the long-term commitments of CL&P pertaining to renewable energy purchase contracts that have now commenced significant construction activities. CL&P (Millions of Dollars) 2024 2025 2026 2027 2028 Thereafter Total Renewable Energy $ 208.8 $ 666.4 $ 743.5 $ 745.9 $ 747.6 $ 4,016.7 $ 7,128.9 Additionally, Renewable Energy contract costs within long-term contractual arrangements at PSNH as of December 31, 2023 included renewable energy purchase contracts related to the purchase of capacity, energy and RECs from a New Hampshire generation plant totaling $503.2 million. The NHPUC approved the termination of the PPA related to this generation plant effective February 29, 2024. As of September 30, 2024, there are no remaining long-term renewable energy purchase contracts at PSNH. 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 ownership interests, 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. The fair value of guarantees issued on behalf of unconsolidated entities are recorded within Other Long-Term Liabilities on the balance sheet, and were $1.1 million and $4.4 million as of September 30, 2024 and December 31, 2023, respectively. Eversource regularly reviews performance risk under these guarantee arrangements, and believes the likelihood of payments being required under the guarantees is remote. 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. On September 30, 2024, Eversource completed the sale of its 50 percent ownership share in the South Fork Wind and Revolution Wind projects to GIP. Under the agreement with GIP, Eversource’s existing and certain additional credit support obligations for Revolution Wind are expected to roll off as the project completes construction. On July 9, 2024, Eversource completed the sale of its 50 percent ownership share of Sunrise Wind to Ørsted. Under the agreement with Ørsted, Eversource’s existing credit support obligations for Sunrise Wind were either terminated or indemnified by Ørsted as a result of the sale. 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 previously-owned offshore wind investments: As of September 30, 2024 Company (Obligor) Description Maximum Exposure North East Offshore, LLC, Revolution Wind, LLC, and TurbineCo, LLC Offshore wind construction-related purchase agreements with third-party contractors (1) $ 455.3 Eversource Investment LLC, Eversource Investment Service Company LLC and South Fork Class B Member, LLC Offshore wind funding and indemnification obligations (2) 351.1 Eversource Investment LLC Letters of Credit (3) 5.3 Eversource TEI LLC South Fork Wind Tax Equity (4) 50.0 South Fork Wind, LLC Power Purchase Agreement Security (5) 7.1 Various Eversource subsidiaries Surety bonds (6) 31.1 (1) Eversource parent issued guarantees on behalf of its previously 50 percent-owned affiliate, Revolution Wind, LLC, and on behalf of TurbineCo, LLC (successor in interest to North East Offshore, LLC (NEO)), under which Eversource parent agreed to guarantee each entity’s performance of obligations under certain construction-related purchase agreements with third-party contractors, in an aggregate amount not to exceed $1.09 billion. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging between October 2024 and November 2027 and (ii) full performance of the guaranteed obligations. 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. (2) Eversource parent issued guarantees on behalf of its wholly-owned subsidiary Eversource Investment LLC (EI), which held Eversource's previous investments in offshore wind-related equity method investments until sale, and on behalf of its previously 50 percent-owned affiliate, South Fork Class B Member, LLC, whereby Eversource parent will guarantee each entity’s performance of certain funding obligations of the South Fork and Revolution Wind projects. Eversource parent also guaranteed certain indemnification obligations of EI associated with third party credit support for EI’s investment in NEO. On September 30, 2024, Eversource parent issued a guaranty on behalf of its wholly-owned subsidiary, Eversource Investment Service Company LLC, whereby Eversource parent will guarantee Eversource Investment Service Company LLC’s performance of certain indemnification obligations during the onshore construction phase of the Revolution Wind project, in an amount not to exceed $100.0 million. These guarantees will not exceed $1.62 billion and expire upon the full performance of the guaranteed obligations. (3) Eversource parent entered into a guarantee on behalf of EI, 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. As of September 30, 2024, EI has issued letters of credit on behalf of South Fork Wind, LLC and Revolution Wind, LLC totaling $5.3 million. The guarantee will remain in effect until full performance of the guaranteed obligations. (4) Eversource parent issued a guarantee on behalf of its wholly-owned subsidiary, Eversource TEI LLC, whereby Eversource parent will guarantee Eversource TEI LLC’s performance of certain obligations, in an amount not to exceed $50.0 million, in connection with any remaining obligations under the LLC agreement. Eversource parent’s obligations expire upon the full performance of the guaranteed obligations. (5) Eversource parent issued a guarantee on behalf of its previously 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 guaranteed obligations. (6) Surety bonds expire in 2024 and 2025. 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. On September 30, 2024, Eversource entered into an agreement with GIP and Ørsted to contingently provide future credit support up to a maximum of $850 million in guarantees, if required, to support third party tax equity financing for Revolution Wind. 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 resulting from the DOE's failure to begin accepting spent nuclear fuel for disposal covering the years from 2017 to 2020. The Yankee Companies filed claims seeking monetary damages totaling $120.4 million for CYAPC, YAEC and MYAPC. Pursuant to a June 2, 2022 court order, the Yankee Companies were subsequently permitted to include monetary damages relating to the year 2021 in the DOE Phase V complaint. The Yankee Companies submitted a supplemental filing to include these costs of $33.1 million on June 8, 2022. In September 2024, the parties reached an agreement in principle to settle the Phase V complaint, subject to approval. As a result of the pending settlement agreement, the court delayed the scheduled start of the DOE Phase V trial from October 28, 2024 to until January 13, 2025, if necessary. 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, FERC issued Opinion No. 531-A and 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 September 30, 2024 and December 31, 2023. 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 September 30, 2024 and December 31, 2023. 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 were appealed to the Court. On August 9, 2022, the Court issued its decision vacating MISO ROE FERC Opinion Nos. 569, 569-A and 569-B and remanded to FERC to reopen the proceedings. The Court found that FERC’s development of the new return methodology was arbitrary and capricious due to FERC’s failure to offer a reasonable explanation for its decision to reintroduce the risk-premium financial model in its new methodology for calculating a just and reasonable return. On October 17, 2024, FERC issued an order on the remand of the MISO ROE proceedings. The order addressed the Court’s decision that the reintroduction of the risk-premium financial model in the ROE methodology was arbitrary and capricious by removing the risk-premium financial model from the ROE methodology. The removal of the risk-premium financial model was the only revision to FERC’s ROE methodology and resulted in a two-model approach utilizing the two-step discounted cash flow model and the capital asset pricing model. MISO was directed to provide refunds for the period November 12, 2013 to February 11, 2015 (the first MISO ROE complaint refund period) and for the period from September 28, 2016 (the date of FERC’s order on the first MISO ROE complaint) to October 17, 2024 by December 1, 2025. The order also stated that FERC does not preclude the use of the risk-premium financial model in future proceedings if the parties can demonstrate that FERC’s stated concerns around the inclusion of the model have been addressed. Given the significant uncertainty regarding the applicability of the FERC order in the MISO transmission owners’ two complaint cases to the NETOs’ pending four complaint cases due to the complex differences between the cases, Eversource concluded that there is no reasonable basis for a change to the reserve or recognized ROEs for any of the complaints or subsequent periods at this time and Eversource cannot reasonably estimate a range of loss for any of the four complaint proceedings at this time. The resolution of these proceedings could have a material impact on the results of operations, financial condition and cash flows. 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.

FAIR VALUE OF FINANCIAL INSTRUM

FAIR VALUE OF FINANCIAL INSTRUMENTS	9 Months Ended
FAIR VALUE OF FINANCIAL INSTRUMENTS	Sep. 30, 2024
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 September 30, 2024: Preferred Stock Not Subject to Mandatory Redemption $ 155.6 $ 131.5 $ 116.2 $ 96.9 $ 43.0 $ 34.6 $ — $ — Long-Term Debt 27,413.9 26,518.4 5,250.6 5,099.2 5,093.7 4,968.0 1,731.8 1,623.6 Rate Reduction Bonds 367.3 360.1 — — — — 367.3 360.1 As of December 31, 2023: Preferred Stock Not Subject to Mandatory Redemption $ 155.6 $ 122.2 $ 116.2 $ 90.4 $ 43.0 $ 31.8 $ — $ — Long-Term Debt 24,413.5 22,855.2 4,814.4 4,572.0 4,496.9 4,273.7 1,431.6 1,292.6 Rate Reduction Bonds 410.5 395.0 — — — — 410.5 395.0 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)	9 Months Ended
ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)	Sep. 30, 2024
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 Nine Months Ended September 30, 2024 For the Nine Months Ended September 30, 2023 Eversource (Millions of Dollars) Qualified Defined Total Qualified Unrealized Defined Total Balance as of Beginning of Period $ (0.4) $ (33.3) $ (33.7) $ (0.4) $ (1.2) $ (37.8) $ (39.4) OCI Before Reclassifications — (0.9) (0.9) — — 0.1 0.1 Amounts Reclassified from AOCI — 6.4 6.4 — 1.2 14.1 15.3 Net OCI — 5.5 5.5 — 1.2 14.2 15.4 Balance as of End of Period $ (0.4) $ (27.8) $ (28.2) $ (0.4) $ — $ (23.6) $ (24.0) 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. Defined benefit plan amounts reclassified from AOCI also include a settlement loss amortized into net periodic benefit plan expense/(income) for the nine months ended September 30, 2023. See Note 8, “Pension Benefits and Postretirement Benefits Other Than Pension,” for further information.

COMMON SHARES

COMMON SHARES	9 Months Ended
COMMON SHARES	Sep. 30, 2024
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 September 30, 2024 and December 31, 2023 Issued as of Par Value September 30, 2024 December 31, 2023 Eversource $ 5 410,000,000 373,276,991 359,984,073 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: Eversource has 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. In the first nine months of 2024, Eversource issued 13.3 million common shares, which resulted in proceeds of $830.2 million, net of issuance costs. Eversource used the net proceeds received for general corporate purposes. In 2023, no shares were issued under this agreement. Treasury Shares: As of September 30, 2024 and December 31, 2023, there were 9,385,018 and 10,443,807 Eversource common shares held as treasury shares, respectively. As of September 30, 2024 and December 31, 2023, there we re 363,891,973 and 349,540,266 Eversource common shares outstanding, respectively. Eversource issues treasury shares to satisfy awards under the Company's incentive plans, shares issued under the dividend reinvestment and share purchase plan, and matching contributions under the Eversource 401k Plan. The issuance of treasury shares represents a non-cash transaction, as the treasury shares were used to fulfill Eversource's obligations that require the issuance of common shares. Dividends on the preferred stock of CL&P and NSTAR Electric totaled $1.9 million for each of the three months ended September 30, 2024 and 2023 and $5.6 million for each of the nine months ended September 30, 2024 and 2023. These dividends were presented as Net Income Attributable to Noncontrolling Interests on the Eversource statements of income. Noncontrolling Interest – Preferred Stock of Subsidiaries on the Eversource balance sheets totaled $155.6 million as of September 30, 2024 and December 31, 2023. On the Eversource balance sheets, Common Shareholders' Equity was fully attributable to Eversource parent and Noncontrolling Interest – Preferred Stock of Subsidiaries was fully attributable to the noncontrolling interest.

COMMON SHAREHOLDERS' EQUITY AND

COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS	9 Months Ended
COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS	Sep. 30, 2024
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 September 30, 2024 and December 31, 2023 Issued as of Par Value September 30, 2024 December 31, 2023 Eversource $ 5 410,000,000 373,276,991 359,984,073 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: Eversource has 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. In the first nine months of 2024, Eversource issued 13.3 million common shares, which resulted in proceeds of $830.2 million, net of issuance costs. Eversource used the net proceeds received for general corporate purposes. In 2023, no shares were issued under this agreement. Treasury Shares: As of September 30, 2024 and December 31, 2023, there were 9,385,018 and 10,443,807 Eversource common shares held as treasury shares, respectively. As of September 30, 2024 and December 31, 2023, there we re 363,891,973 and 349,540,266 Eversource common shares outstanding, respectively. Eversource issues treasury shares to satisfy awards under the Company's incentive plans, shares issued under the dividend reinvestment and share purchase plan, and matching contributions under the Eversource 401k Plan. The issuance of treasury shares represents a non-cash transaction, as the treasury shares were used to fulfill Eversource's obligations that require the issuance of common shares. Dividends on the preferred stock of CL&P and NSTAR Electric totaled $1.9 million for each of the three months ended September 30, 2024 and 2023 and $5.6 million for each of the nine months ended September 30, 2024 and 2023. These dividends were presented as Net Income Attributable to Noncontrolling Interests on the Eversource statements of income. Noncontrolling Interest – Preferred Stock of Subsidiaries on the Eversource balance sheets totaled $155.6 million as of September 30, 2024 and December 31, 2023. On the Eversource balance sheets, Common Shareholders' Equity was fully attributable to Eversource parent and Noncontrolling Interest – Preferred Stock of Subsidiaries was fully attributable to the noncontrolling interest.

EARNINGS PER SHARE

EARNINGS PER SHARE	9 Months Ended
EARNINGS PER SHARE	Sep. 30, 2024
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS/(LOSS) PER SHARE Basic earnings/(loss) per share is computed based upon the weighted average number of common shares outstanding during each period. Diluted earnings/(loss) per share 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 nine months ended September 30, 2024 and 2023, there were no antidilutive share awards excluded from the computation of diluted EPS. The following table sets forth the components of basic and diluted earnings/(loss) per share: Eversource (Millions of Dollars, except share information) For the Three Months Ended For the Nine Months Ended September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 Net (Loss)/Income Attributable to Common $ (118.1) $ 339.7 $ 739.1 $ 846.2 Weighted Average Common Shares Outstanding: Basic 359,520,518 349,704,155 354,483,338 349,461,219 Dilutive Effect 297,139 147,814 261,508 270,101 Diluted 359,817,657 349,851,969 354,744,846 349,731,320 Basic (Loss)/Earnings Per Common Share $ (0.33) $ 0.97 $ 2.09 $ 2.42 Diluted (Loss)/Earnings Per Common Share $ (0.33) $ 0.97 $ 2.08 $ 2.42

REVENUES

REVENUES	9 Months Ended
REVENUES	Sep. 30, 2024
Revenue from Contract with Customer [Abstract]
REVENUES	REVENUES The following tables present operating revenues disaggregated by revenue source: For the Three Months Ended September 30, 2024 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,465.5 $ 86.7 $ — $ 43.7 $ — $ — $ 1,595.9 Commercial 857.8 71.0 — 18.7 — (2.5) 945.0 Industrial 111.4 31.6 — 1.3 — (5.4) 138.9 Total Retail Tariff Sales Revenues 2,434.7 189.3 — 63.7 — (7.9) 2,679.8 Wholesale Transmission Revenues — — 583.6 — — (431.1) 152.5 Wholesale Market Sales Revenues 173.8 29.0 — 1.2 — — 204.0 Other Revenues from Contracts with Customers 22.4 1.9 3.5 1.2 414.7 (412.6) 31.1 Total Revenues from Contracts with Customers 2,630.9 220.2 587.1 66.1 414.7 (851.6) 3,067.4 Alternative Revenue Programs (2.9) (3.6) (45.2) 0.6 — 41.0 (10.1) Other Revenues 4.8 0.6 0.1 0.4 — — 5.9 Total Operating Revenues $ 2,632.8 $ 217.2 $ 542.0 $ 67.1 $ 414.7 $ (810.6) $ 3,063.2 For the Nine Months Ended September 30, 2024 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 3,747.1 $ 798.3 $ — $ 111.8 $ — $ — $ 4,657.2 Commercial 2,248.5 434.5 — 53.1 — (5.7) 2,730.4 Industrial 289.0 127.0 — 3.5 — (16.5) 403.0 Total Retail Tariff Sales Revenues 6,284.6 1,359.8 — 168.4 — (22.2) 7,790.6 Wholesale Transmission Revenues — — 1,570.6 — — (1,188.8) 381.8 Wholesale Market Sales Revenues 471.1 122.2 — 3.1 — — 596.4 Other Revenues from Contracts with Customers 66.8 4.5 11.0 2.5 1,253.6 (1,247.7) 90.7 Total Revenues from Contracts with Customers 6,822.5 1,486.5 1,581.6 174.0 1,253.6 (2,458.7) 8,859.5 Alternative Revenue Programs 24.4 28.1 1.9 (0.2) — (1.7) 52.5 Other Revenues 13.9 2.1 0.4 0.9 — — 17.3 Total Operating Revenues $ 6,860.8 $ 1,516.7 $ 1,583.9 $ 174.7 $ 1,253.6 $ (2,460.4) $ 8,929.3 For the Three Months Ended September 30, 2023 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,375.9 $ 83.0 $ — $ 44.7 $ — $ — $ 1,503.6 Commercial 764.1 33.7 — 19.6 — (1.1) 816.3 Industrial 94.5 30.2 — 1.2 — (4.8) 121.1 Total Retail Tariff Sales Revenues 2,234.5 146.9 — 65.5 — (5.9) 2,441.0 Wholesale Transmission Revenues — — 520.2 — — (386.6) 133.6 Wholesale Market Sales Revenues 154.9 71.6 — 1.1 — — 227.6 Other Revenues from Contracts with Customers 20.9 1.3 4.8 2.0 394.7 (392.4) 31.3 Total Revenues from Contracts with Customers 2,410.3 219.8 525.0 68.6 394.7 (784.9) 2,833.5 Alternative Revenue Programs (43.8) (2.4) (33.6) (0.3) — 31.9 (48.2) Other Revenues 4.8 0.9 0.2 0.3 — — 6.2 Total Operating Revenues $ 2,371.3 $ 218.3 $ 491.6 $ 68.6 $ 394.7 $ (753.0) $ 2,791.5 For the Nine Months Ended September 30, 2023 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 3,982.1 $ 858.0 $ — $ 112.6 $ — $ — $ 4,952.7 Commercial 2,244.7 483.6 — 53.2 — (3.4) 2,778.1 Industrial 268.5 141.7 — 3.4 — (14.6) 399.0 Total Retail Tariff Sales Revenues 6,495.3 1,483.3 — 169.2 — (18.0) 8,129.8 Wholesale Transmission Revenues — — 1,358.2 — — (1,015.6) 342.6 Wholesale Market Sales Revenues 484.4 160.5 — 2.9 — — 647.8 Other Revenues from Contracts with Customers 60.1 3.9 14.1 6.1 1,217.3 (1,210.7) 90.8 Total Revenues from Contracts with Customers 7,039.8 1,647.7 1,372.3 178.2 1,217.3 (2,244.3) 9,211.0 Alternative Revenue Programs (40.7) 21.9 57.6 (2.0) — (50.8) (14.0) Other Revenues 15.2 3.0 0.5 0.8 — — 19.5 Total Operating Revenues $ 7,014.3 $ 1,672.6 $ 1,430.4 $ 177.0 $ 1,217.3 $ (2,295.1) $ 9,216.5 For the Three Months Ended September 30, 2024 For the Three Months Ended September 30, 2023 (Millions of Dollars) CL&P NSTAR Electric PSNH CL&P NSTAR Electric PSNH Revenues from Contracts with Customers Retail Tariff Sales Residential $ 757.1 $ 530.8 $ 177.6 $ 703.9 $ 480.5 $ 191.5 Commercial 349.9 416.9 91.4 286.4 389.4 88.7 Industrial 51.2 32.9 27.3 39.0 31.9 23.6 Total Retail Tariff Sales Revenues 1,158.2 980.6 296.3 1,029.3 901.8 303.8 Wholesale Transmission Revenues 262.2 212.3 109.1 245.1 186.4 88.7 Wholesale Market Sales Revenues 134.1 31.8 7.9 112.8 28.6 13.5 Other Revenues from Contracts with Customers 9.1 12.1 5.2 9.0 12.4 5.0 Total Revenues from Contracts with Customers 1,563.6 1,236.8 418.5 1,396.2 1,129.2 411.0 Alternative Revenue Programs (46.5) 8.1 (9.7) (49.3) (29.0) 0.9 Other Revenues 2.4 2.0 0.5 2.4 1.9 0.7 Eliminations (174.2) (169.4) (67.3) (159.2) (148.6) (59.5) Total Operating Revenues $ 1,345.3 $ 1,077.5 $ 342.0 $ 1,190.1 $ 953.5 $ 353.1 For the Nine Months Ended September 30, 2024 For the Nine Months Ended September 30, 2023 (Millions of Dollars) CL&P NSTAR Electric PSNH CL&P NSTAR Electric PSNH Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,897.7 $ 1,373.2 $ 476.2 $ 2,059.9 $ 1,318.7 $ 603.5 Commercial 850.2 1,144.8 254.6 836.7 1,121.0 287.5 Industrial 117.0 93.1 78.9 104.1 95.7 68.7 Total Retail Tariff Sales Revenues 2,864.9 2,611.1 809.7 3,000.7 2,535.4 959.7 Wholesale Transmission Revenues 681.7 602.0 286.9 613.3 521.0 223.9 Wholesale Market Sales Revenues 352.8 90.3 28.0 330.4 102.1 51.9 Other Revenues from Contracts with Customers 27.0 36.5 15.9 27.8 36.0 12.2 Total Revenues from Contracts with Customers 3,926.4 3,339.9 1,140.5 3,972.2 3,194.5 1,247.7 Alternative Revenue Programs 4.9 20.1 1.3 28.0 (43.5) 32.4 Other Revenues 6.7 5.6 2.0 7.1 6.3 2.3 Eliminations (506.8) (495.4) (188.3) (444.1) (428.5) (159.1) Total Operating Revenues $ 3,431.2 $ 2,870.2 $ 955.5 $ 3,563.2 $ 2,728.8 $ 1,123.3

SEGMENT INFORMATION

SEGMENT INFORMATION	9 Months Ended
SEGMENT INFORMATION	Sep. 30, 2024
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION In November 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2023-07, Segment Reporting (Topic 280): Improvement to Reportable Segment Disclosures , which requires entities to disclose significant segment expenses, other segment items, the title and position of the chief operating decision maker (CODM) and information related to how the CODM assesses segment performance and allocates resources, among certain other required disclosures. Additionally, current annual disclosures will be required in interim periods. The new standard is effective, on a retrospective basis, for annual periods beginning January 1, 2024, and interim periods beginning January 1, 2025. 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 included the offshore wind investments until sale of the three offshore wind projects in the third quarter of 2024, a natural gas pipeline owned by Enbridge, Inc., and a renewable energy investment fund that was liquidated in the first quarter of 2023. 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, Purchased Natural Gas 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 on capital projects but not yet paid, cost of removal, AFUDC related to equity funds, and the capitalized and deferred portions of pension and PBOP income/expense. Eversource's segment information is as follows: For the Three Months Ended September 30, 2024 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 2,632.8 $ 217.2 $ 542.0 $ 67.1 $ 414.7 $ (810.6) $ 3,063.2 Depreciation and Amortization (420.8) (28.2) (102.0) (9.8) (52.1) 2.8 (610.1) Other Operating Expenses (1,910.7) (216.4) (163.6) (31.2) (326.6) 807.8 (1,840.7) Operating Income/(Loss) $ 301.3 $ (27.4) $ 276.4 $ 26.1 $ 36.0 $ — $ 612.4 Interest Expense $ (98.8) $ (25.2) $ (48.5) $ (8.3) $ (177.7) $ 57.9 $ (300.6) Loss on Offshore Wind Investments — — — — (464.0) — (464.0) Other Income, Net 65.8 11.4 11.8 6.2 48.8 (31.4) 112.6 Net Income/(Loss) Attributable to Common 203.5 (30.2) 174.9 23.7 (516.5) 26.5 (118.1) For the Nine Months Ended September 30, 2024 Eversource (Millions of Dollars) Electric Distribution Natural Gas Distribution Electric Transmission Water Distribution Other Eliminations Total Operating Revenues $ 6,860.8 $ 1,516.7 $ 1,583.9 $ 174.7 $ 1,253.6 $ (2,460.4) $ 8,929.3 Depreciation and Amortization (565.5) (161.4) (301.8) (21.2) (146.3) 8.1 (1,188.1) Other Operating Expenses (5,529.3) (1,066.2) (452.6) (94.2) (990.3) 2,452.3 (5,680.3) Operating Income $ 766.0 $ 289.1 $ 829.5 $ 59.3 $ 117.0 $ — $ 2,060.9 Interest Expense $ (272.2) $ (72.0) $ (135.4) $ (29.4) $ (484.8) $ 171.2 $ (822.6) Loss on Offshore Wind Investments — — — — (464.0) — (464.0) Other Income, Net 189.2 32.5 38.1 8.5 1,145.0 (1,094.4) 318.9 Net Income Attributable to Common 521.3 187.4 540.6 37.1 375.9 (923.2) 739.1 Cash Flows Used for Investments in Plant 1,309.1 697.8 985.6 119.3 180.1 — 3,291.9 For the Three Months Ended September 30, 2023 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 2,371.3 $ 218.3 $ 491.6 $ 68.6 $ 394.7 $ (753.0) $ 2,791.5 Depreciation and Amortization (0.7) (38.0) (94.5) (13.9) (40.7) 2.3 (185.5) Other Operating Expenses (2,124.0) (211.1) (144.9) (30.9) (315.7) 751.2 (2,075.4) Operating Income/(Loss) $ 246.6 $ (30.8) $ 252.2 $ 23.8 $ 38.3 $ 0.5 $ 530.6 Interest Expense $ (76.8) $ (19.7) $ (43.0) $ (9.8) $ (111.4) $ 38.4 $ (222.3) Other Income, Net 53.5 9.2 11.9 1.3 415.9 (412.7) 79.1 Net Income/(Loss) Attributable to 173.3 (33.7) 160.3 16.6 397.0 (373.8) 339.7 For the Nine Months Ended September 30, 2023 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 7,014.3 $ 1,672.6 $ 1,430.4 $ 177.0 $ 1,217.3 $ (2,295.1) $ 9,216.5 Depreciation and Amortization 59.3 (156.7) (276.4) (41.3) (115.5) 6.6 (524.0) Other Operating Expenses (6,371.4) (1,280.8) (409.4) (87.5) (992.6) 2,290.0 (6,851.7) Operating Income $ 702.2 $ 235.1 $ 744.6 $ 48.2 $ 109.2 $ 1.5 $ 1,840.8 Interest Expense $ (214.4) $ (62.4) $ (126.7) $ (28.4) $ (297.0) $ 104.8 $ (624.1) Loss on Offshore Wind Investments — — — — (401.0) — (401.0) Other Income, Net 155.7 27.9 30.8 4.0 1,082.6 (1,038.0) 263.0 Net Income Attributable to Common Shareholders 504.3 148.2 476.4 27.4 621.6 (931.7) 846.2 Cash Flows Used for Investments in Plant 1,230.3 536.8 1,011.3 140.1 207.1 — 3,125.6 The following table summarizes Eversource's segmented total assets: Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total As of September 30, 2024 $ 31,411.3 $ 9,518.2 $ 15,750.5 $ 3,056.2 $ 27,371.0 $ (28,533.9) $ 58,573.3 As of December 31, 2023 29,426.4 8,775.3 14,806.5 2,944.8 26,337.7 (26,678.5) 55,612.2

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Sep. 30, 2024
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 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 twelve 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 2023 Form 10-K, which was filed with the SEC on February 14, 2024. 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 September 30, 2024 and December 31, 2023, and the results of operations, comprehensive income and common shareholders' equity for the three and nine months ended September 30, 2024 and 2023, and the cash flows for the nine months ended September 30, 2024 and 2023. The results of operations and comprehensive income for the three and nine months ended September 30, 2024 and 2023 and the cash flows for the nine months ended September 30, 2024 and 2023 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. In the third quarter of 2024, Eversource sold its 50 percent equity ownership interests in three offshore wind projects that had been accounted for under the equity method. See Note 1E, "Summary of Significant Accounting Policies – Investments in Unconsolidated Affiliates," for further information. 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). 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 economic 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 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 September 30, 2024 adequately reflected the collection risk and net realizable value for its receivables. 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 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 business combinations and asset 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)	9 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	Sep. 30, 2024
Accounting Policies [Abstract]
Schedule of Allowance for Uncollectible Accounts	The activity in the allowance for uncollectible accounts by portfolio segment as of September 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 2024 Beginning Balance $ 389.1 $ 190.5 $ 579.6 $ 274.4 $ 34.2 $ 308.6 $ 45.9 $ 60.3 $ 106.2 $ 14.1 Uncollectible Expense — 29.2 29.2 — 5.1 5.1 — 15.7 15.7 1.2 Uncollectible Costs Deferred (1) 5.4 16.0 21.4 (8.8) 3.4 (5.4) 10.1 8.2 18.3 1.4 Write-Offs (16.8) (41.3) (58.1) (12.2) (7.4) (19.6) (1.9) (20.3) (22.2) (3.2) Recoveries Collected 0.1 2.5 2.6 0.1 1.0 1.1 — 0.3 0.3 0.2 Ending Balance $ 377.8 $ 196.9 $ 574.7 $ 253.5 $ 36.3 $ 289.8 $ 54.1 $ 64.2 $ 118.3 $ 13.7 Nine Months Ended 2024 Beginning Balance $ 366.8 $ 187.7 $ 554.5 $ 259.7 $ 36.3 $ 296.0 $ 43.6 $ 53.4 $ 97.0 $ 14.3 Uncollectible Expense — 55.4 55.4 — 11.4 11.4 — 27.7 27.7 3.4 Uncollectible Costs Deferred (1) 58.9 37.5 96.4 29.3 8.7 38.0 13.6 17.3 30.9 3.8 Write-Offs (48.5) (93.1) (141.6) (36.0) (23.4) (59.4) (3.1) (36.6) (39.7) (8.4) Recoveries Collected 0.6 9.4 10.0 0.5 3.3 3.8 — 2.4 2.4 0.6 Ending Balance $ 377.8 $ 196.9 $ 574.7 $ 253.5 $ 36.3 $ 289.8 $ 54.1 $ 64.2 $ 118.3 $ 13.7 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 (2) Three Months Ended 2023 Beginning Balance $ 338.2 $ 194.2 $ 532.4 $ 226.5 $ 36.3 $ 262.8 $ 45.6 $ 52.2 $ 97.8 $ 12.7 Uncollectible Expense — 16.8 16.8 — 2.4 2.4 — 5.2 5.2 2.0 Uncollectible Costs Deferred (1) 33.9 14.0 47.9 29.4 3.1 32.5 3.4 4.5 7.9 1.1 Write-Offs (17.5) (40.4) (57.9) (14.9) (7.6) (22.5) 0.1 (11.5) (11.4) (3.6) Recoveries Collected 0.2 3.3 3.5 0.2 0.9 1.1 — 1.3 1.3 0.2 Ending Balance $ 354.8 $ 187.9 $ 542.7 $ 241.2 $ 35.1 $ 276.3 $ 49.1 $ 51.7 $ 100.8 $ 12.4 Nine Months Ended 2023 Beginning Balance $ 284.4 $ 201.9 $ 486.3 $ 188.9 $ 36.4 $ 225.3 $ 43.7 $ 51.3 $ 95.0 $ 29.2 Uncollectible Expense — 40.9 40.9 — 7.1 7.1 — 13.0 13.0 1.5 Uncollectible Costs Deferred (1) 104.7 22.8 127.5 80.3 9.3 89.6 5.8 13.8 19.6 (11.1) Write-Offs (35.3) (88.5) (123.8) (29.0) (21.3) (50.3) (0.4) (30.4) (30.8) (7.8) Recoveries Collected 1.0 10.8 11.8 1.0 3.6 4.6 — 4.0 4.0 0.6 Ending Balance $ 354.8 $ 187.9 $ 542.7 $ 241.2 $ 35.1 $ 276.3 $ 49.1 $ 51.7 $ 100.8 $ 12.4 (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. The increases in the allowance for uncollectible hardship accounts at Eversource and CL&P in 2023 primarily relate to increased customer enrollment in disconnection prevention programs in Connecticut. (2) In connection with PSNH’s pole purchase agreement on May 1, 2023, the purchase price included the forgiveness of previously reserved receivables for reimbursement of operation and maintenance and vegetation management costs.
Schedule of Components of Other Income, Net	The components of Other Income, Net on the statements of income were as follows: For the Three Months Ended September 30, 2024 September 30, 2023 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Pension, SERP and PBOP Non-Service $ 31.6 $ 7.7 $ 13.9 $ 3.9 $ 28.5 $ 7.0 $ 12.9 $ 3.7 AFUDC Equity 22.7 5.4 13.0 1.5 21.0 5.2 12.5 1.6 Equity in Earnings of Unconsolidated Affiliates 17.1 — 0.2 — 2.7 — 0.1 — Investment (Loss)/Income (2.1) (0.9) (0.2) (0.3) 2.7 1.5 0.7 0.4 Interest Income 38.9 9.7 20.6 3.0 24.1 4.6 13.6 1.5 Other 4.4 — — — 0.1 — 0.1 — Total Other Income, Net $ 112.6 $ 21.9 $ 47.5 $ 8.1 $ 79.1 $ 18.3 $ 39.9 $ 7.2 For the Nine Months Ended September 30, 2024 September 30, 2023 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Pension, SERP and PBOP Non-Service $ 89.4 $ 21.4 $ 39.5 $ 11.2 $ 96.6 $ 24.9 $ 41.7 $ 11.8 AFUDC Equity 73.2 16.9 44.4 5.1 55.5 13.9 34.0 3.4 Equity in Earnings of Unconsolidated Affiliates (1) 48.1 — 0.6 — 11.5 — 0.3 — Investment (Loss)/Income (1.8) (1.7) 0.7 (0.5) (0.4) (0.2) 0.5 — Interest Income 106.0 24.8 57.8 7.1 68.6 8.0 44.0 3.6 Other (2) 4.0 — — — 31.2 — 0.2 0.4 Total Other Income, Net $ 318.9 $ 61.4 $ 143.0 $ 22.9 $ 263.0 $ 46.6 $ 120.7 $ 19.2 (1) Equity in Earnings of Unconsolidated Affiliates includes $23.4 million of pre-tax income recorded at Eversource in the second quarter of 2024 from Eversource’s wind equity method investment, North East Offshore, as a result of a vendor settlement agreement payment received by the joint venture. (2) Eversource’s equity method investment in a renewable energy fund was liquidated in March 2023. Liquidation proceeds in excess of the carrying value were recorded in 2023 within Other in the tables above. See Note 1E, "Summary of Significant Accounting Policies - Investments in Unconsolidated Affiliates," for further information.
Schedule of Investments in Unconsolidated Affiliates	Eversource's investments included the following: Investment Balance (Millions of Dollars) Ownership Interest As of September 30, 2024 As of December 31, 2023 Offshore Wind Business 50% - 100% $ 22.2 $ 515.5 Natural Gas Pipeline - Algonquin Gas Transmission, LLC 15% 113.5 116.0 Other various 30.7 29.0 Total Investments in Unconsolidated Affiliates $ 166.4 $ 660.5
Schedule of 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 Nine Months Ended (Millions of Dollars) September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 Eversource $ 59.3 $ 53.7 $ 157.2 $ 153.4 CL&P 56.0 50.2 139.6 132.2
Schedule of Non-Cash Investing Activities	Non-cash investing activities include plant additions included in Accounts Payable as follows: (Millions of Dollars) As of September 30, 2024 As of September 30, 2023 Eversource $ 458.6 $ 462.4 CL&P 73.0 86.3 NSTAR Electric 164.8 135.9 PSNH 67.5 71.9
Reconciliation of Cash Balances to Cash and Restricted Cash	The following table reconciles cash and cash equivalents as reported on the balance sheets to the cash, cash equivalents and restricted cash balance as reported on the statements of cash flows: As of September 30, 2024 As of December 31, 2023 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Cash and Cash Equivalents as reported on the Balance Sheets $ 97.9 $ 10.1 $ 4.5 $ 4.7 $ 53.9 $ 10.2 $ 6.7 $ 0.2 Restricted cash included in: Special Deposits 66.5 1.0 11.5 18.9 81.5 2.0 16.1 31.6 Marketable Securities 21.5 — — — 13.7 — — — Other Long-Term Assets 16.9 — — 3.1 17.3 — — 3.2 Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows $ 202.8 $ 11.1 $ 16.0 $ 26.7 $ 166.4 $ 12.2 $ 22.8 $ 35.0

REGULATORY ACCOUNTING (Tables)

REGULATORY ACCOUNTING (Tables)	9 Months Ended
REGULATORY ACCOUNTING (Tables)	Sep. 30, 2024
Regulated Operations [Abstract]
Components of Regulatory Assets	The components of regulatory assets were as follows: As of September 30, 2024 As of December 31, 2023 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Storm Costs, Net $ 2,077.2 $ 998.3 $ 626.3 $ 452.6 $ 1,785.9 $ 896.6 $ 609.1 $ 280.2 Regulatory Tracking Mechanisms 1,638.1 529.3 572.6 153.9 1,319.2 354.5 482.9 182.2 Benefit Costs 1,096.0 198.2 313.8 79.7 1,117.3 197.4 336.7 79.3 Income Taxes, Net 944.9 522.7 141.6 19.1 912.4 512.6 128.6 16.4 Securitized Stranded Costs 360.1 — — 360.1 392.5 — — 392.5 Goodwill-related 251.5 — 215.9 — 264.1 — 226.7 — Asset Retirement Obligations 147.0 40.5 76.8 5.0 137.9 38.5 72.3 4.7 Derivative Liabilities 72.6 72.6 — — 120.9 120.9 — — Other Regulatory Assets 430.6 65.1 102.8 4.8 339.0 22.7 101.6 8.0 Total Regulatory Assets 7,018.0 2,426.7 2,049.8 1,075.2 6,389.2 2,143.2 1,957.9 963.3 Less: Current Portion 2,024.9 672.8 778.9 170.5 1,674.2 480.4 676.1 189.5 Total Long-Term Regulatory Assets $ 4,993.1 $ 1,753.9 $ 1,270.9 $ 904.7 $ 4,715.0 $ 1,662.8 $ 1,281.8 $ 773.8
Components of Regulatory Liabilities	The components of regulatory liabilities were as follows: As of September 30, 2024 As of December 31, 2023 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH EDIT due to Tax Cuts and Jobs Act of 2017 $ 2,512.2 $ 960.1 $ 885.2 $ 333.7 $ 2,548.6 $ 969.2 $ 905.1 $ 339.3 Regulatory Tracking Mechanisms 789.8 188.2 446.9 99.8 668.3 154.0 347.2 114.4 Cost of Removal 740.4 197.5 448.1 21.1 666.6 157.9 420.9 16.2 Deferred Portion of Non-Service Income 409.3 58.8 202.8 41.1 354.0 49.9 175.9 36.6 AFUDC - Transmission 148.4 63.2 85.2 — 124.3 56.1 68.2 — Benefit Costs 34.9 0.4 10.4 — 51.0 0.6 22.2 — Other Regulatory Liabilities 212.3 41.6 14.0 4.9 201.9 30.4 13.9 4.6 Total Regulatory Liabilities 4,847.3 1,509.8 2,092.6 500.6 4,614.7 1,418.1 1,953.4 511.1 Less: Current Portion 722.5 139.5 468.8 106.8 591.8 102.2 368.1 117.5 Total Long-Term Regulatory Liabilities $ 4,124.8 $ 1,370.3 $ 1,623.8 $ 393.8 $ 4,022.9 $ 1,315.9 $ 1,585.3 $ 393.6

PROPERTY, PLANT AND EQUIPMENT_2

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION (Tables)	9 Months Ended
	Sep. 30, 2024
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 September 30, 2024 As of December 31, 2023 (Millions of Dollars) Distribution - Electric $ 20,766.1 $ 19,656.5 Distribution - Natural Gas 8,569.3 8,155.3 Transmission - Electric 15,679.1 14,666.8 Distribution - Water 2,319.2 2,280.1 Solar 201.1 201.1 Utility 47,534.8 44,959.8 Other (1) 2,233.9 2,006.8 Property, Plant and Equipment, Gross 49,768.7 46,966.6 Less: Accumulated Depreciation Utility (10,137.9) (9,670.1) Other (1,003.5) (869.6) Total Accumulated Depreciation (11,141.4) (10,539.7) Property, Plant and Equipment, Net 38,627.3 36,426.9 Construction Work in Progress 3,284.2 3,071.7 Total Property, Plant and Equipment, Net $ 41,911.5 $ 39,498.6 As of September 30, 2024 As of December 31, 2023 (Millions of Dollars) CL&P NSTAR PSNH CL&P NSTAR PSNH Distribution - Electric $ 8,336.4 $ 9,558.1 $ 2,911.9 $ 7,897.1 $ 9,000.5 $ 2,799.2 Transmission - Electric 6,804.1 6,183.7 2,692.9 6,548.2 5,630.8 2,489.5 Solar — 201.1 — — 201.1 — Property, Plant and Equipment, Gross 15,140.5 15,942.9 5,604.8 14,445.3 14,832.4 5,288.7 Less: Accumulated Depreciation (2,874.1) (3,719.7) (1,014.2) (2,670.5) (3,585.9) (984.0) Property, Plant and Equipment, Net 12,266.4 12,223.2 4,590.6 11,774.8 11,246.5 4,304.7 Construction Work in Progress 563.4 1,404.0 368.3 565.4 1,507.3 270.0 Total Property, Plant and Equipment, Net $ 12,829.8 $ 13,627.2 $ 4,958.9 $ 12,340.2 $ 12,753.8 $ 4,574.7 (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)	9 Months Ended
DERIVATIVE INSTRUMENTS (Tables)	Sep. 30, 2024
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 September 30, 2024 As of December 31, 2023 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 2 $ 15.5 $ (0.4) $ 15.1 $ 16.4 $ (0.5) $ 15.9 Long-Term Derivative Assets Level 2 2.5 (0.2) 2.3 13.6 (0.5) 13.1 Current Derivative Liabilities Level 2 (77.5) — (77.5) (81.9) — (81.9) Long-Term Derivative Liabilities Level 2 (12.5) — (12.5) (68.0) — (68.0) (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.
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 September 30, 2023 For the Nine Months Ended September 30, 2023 (Millions of Dollars) Derivatives, Net: Fair Value as of Beginning of Period $ (152.1) $ (181.8) Net Realized/Unrealized Losses Included in Regulatory Assets (1.5) (1.6) Settlements 17.0 46.8 Fair Value as of End of Period $ (136.6) $ (136.6)

MARKETABLE SECURITIES (Tables)

MARKETABLE SECURITIES (Tables)	9 Months Ended
MARKETABLE SECURITIES (Tables)	Sep. 30, 2024
Investments, Debt and Equity Securities [Abstract]
Summary of Available-for-Sale Debt Securities	The following is a summary of available-for-sale debt securities, which are held in CYAPC’s and YAEC’s spent nuclear fuel trusts: As of September 30, 2024 As of December 31, 2023 Eversource (Millions of Dollars) Amortized Cost Pre-Tax Pre-Tax Fair Value Amortized Cost Pre-Tax Pre-Tax Fair Value Debt Securities $ 176.9 $ 1.1 $ (5.1) $ 172.9 $ 169.5 $ 1.4 $ (6.6) $ 164.3
Contractual Maturities of Available-for-Sale Debt Securities	As of September 30, 2024, the contractual maturities of available-for-sale debt securities were as follows: Eversource (Millions of Dollars) Amortized Cost Fair Value Less than one year $ 24.7 $ 24.7 One to five years 33.7 33.9 Six to ten years 41.0 41.2 Greater than ten years 77.5 73.1 Total Debt Securities $ 176.9 $ 172.9
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 September 30, 2024 As of December 31, 2023 Level 1: Mutual Funds and Equities $ 170.3 $ 176.9 Money Market Funds 21.5 13.7 Total Level 1 $ 191.8 $ 190.6 Level 2: U.S. Government Issued Debt Securities (Agency and Treasury) $ 90.1 $ 90.1 Corporate Debt Securities 35.9 34.0 Asset-Backed Debt Securities 8.2 5.6 Municipal Bonds 7.4 9.8 Other Fixed Income Securities 9.8 11.1 Total Level 2 $ 151.4 $ 150.6 Total Marketable Securities $ 343.2 $ 341.2

SHORT-TERM AND LONG-TERM DEBT (

SHORT-TERM AND LONG-TERM DEBT (Tables)	9 Months Ended
SHORT-TERM AND LONG-TERM DEBT (Tables)	Sep. 30, 2024
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 September 30, 2024 December 31, 2023 September 30, 2024 December 31, 2023 September 30, 2024 December 31, 2023 (Millions of Dollars) Eversource Parent Commercial Paper Program $ 322.0 $ 1,771.9 $ 1,678.0 $ 228.1 5.12 % 5.60 % NSTAR Electric Commercial Paper Program 537.5 365.8 112.5 284.2 4.94 % 5.40 %
Summary of Long-Term Debt Issuance and Repayments	The following table summarizes long-term debt issuances and repayments: (Millions of Dollars) Interest Rate Issuance/(Repayment) Issue Date or Repayment Date Maturity Date Use of Proceeds for Issuance/ CL&P Series A First Mortgage Bonds 4.65 % $ 350.0 January 2024 January 2029 Repaid short-term debt, paid capital expenditures and working capital CL&P Series B First Mortgage Bonds 4.95 % 300.0 August 2024 August 2034 Repaid Series D Bonds, repaid short-term debt, and working capital CL&P Series D First Mortgage Bonds 7.875 % (139.8) October 2024 October 2024 Paid at maturity NSTAR Electric Debentures 5.40 % 600.0 May 2024 June 2034 Repaid short-term debt, paid capital expenditures and working capital PSNH Series X First Mortgage Bonds 5.35 % 300.0 April 2024 October 2033 Repaid short-term debt, paid capital expenditures and working capital Eversource Parent Series DD Senior Notes 5.00 % 350.0 January 2024 January 2027 Repaid short-term debt Eversource Parent Series EE Senior Notes 5.50 % 650.0 January 2024 January 2034 Repaid short-term debt Eversource Parent Series FF Senior Notes 5.85 % 700.0 April 2024 April 2031 Repaid Series X Senior Notes and Aquarion’s 2014 Senior Notes at maturity and short-term debt Eversource Parent Series GG Senior Notes 5.95 % 700.0 April 2024 July 2034 Repaid Series X Senior Notes and Aquarion’s 2014 Senior Notes at maturity and short-term debt Eversource Parent Series X Senior Notes 4.20 % (900.0) June 2024 June 2024 Paid at maturity Eversource Parent Series L Senior Notes 2.90 % (450.0) October 2024 October 2024 Paid at maturity NSTAR Gas Series W First Mortgage Bonds 5.29 % 160.0 June 2024 June 2029 Repaid short-term debt, paid capital expenditures and general corporate purchases NSTAR Gas Series X First Mortgage Bonds 5.48 % 40.0 June 2024 June 2034 Repaid short-term debt, paid capital expenditures and general corporate purchases Yankee Gas Series W First Mortgage Bonds 5.50 % 90.0 July 2024 July 2029 Repaid short-term debt, paid capital expenditures, working capital and repaid Series P bonds at maturity Yankee Gas Series X First Mortgage Bonds 5.74 % 90.0 July 2024 July 2034 Repaid short-term debt, paid capital expenditures, working capital and repaid Series P bonds at maturity Yankee Gas Series P First Mortgage Bonds 2.23 % (100.0) October 2024 October 2024 Paid at maturity EGMA Series E First Mortgage Bonds 5.17 % 100.0 October 2024 November 2034 Refinanced existing indebtedness, paid capital expenditures and general corporate purchases Aquarion Senior Notes 4.00 % (360.0) August 2024 August 2024 Paid at maturity Aquarion Water Company of Connecticut Senior Notes 5.57 % 70.0 August 2024 September 2034 Repaid short-term debt, paid capital expenditures and general corporate purchases

RATE REDUCTION BONDS AND VARI_2

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES (Tables)	9 Months Ended
	Sep. 30, 2024
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 September 30, 2024 As of December 31, 2023 Restricted Cash - Current Portion (included in Special Deposits) $ 17.3 $ 30.0 Restricted Cash - Long-Term Portion (included in Other Long-Term Assets) 3.1 3.2 Securitized Stranded Cost (included in Regulatory Assets) 360.1 392.5 Other Regulatory Liabilities (included in Regulatory Liabilities) 7.5 5.3 Accrued Interest (included in Other Current Liabilities) 2.3 6.3 Rate Reduction Bonds - Current Portion 43.2 43.2 Rate Reduction Bonds - Long-Term Portion 324.1 367.3 (Millions of Dollars) PSNH Income Statements: For the Three Months Ended For the Nine Months Ended September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 Amortization of RRB Principal (included in Amortization of $ 10.8 $ 10.8 $ 32.4 $ 32.4 Interest Expense on RRB Principal (included in Interest Expense) 3.5 3.9 10.8 11.9

PENSION BENEFITS AND POSTRETI_2

PENSION BENEFITS AND POSTRETIREMENT BENEFITS OTHER THAN PENSION (Tables)	9 Months Ended
	Sep. 30, 2024
Postemployment Benefits [Abstract]
Components of Net Periodic Benefit Expense/(Income)	Pension, SERP and PBOP expense 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 September 30, 2024 For the Three Months Ended September 30, 2024 (Millions of Dollars) Eversource CL&P NSTAR Electric PSNH Eversource CL&P NSTAR Electric PSNH Service Cost $ 11.2 $ 3.3 $ 1.9 $ 1.1 $ 1.7 $ 0.3 $ 0.3 $ 0.1 Interest Cost 62.7 12.6 12.8 6.7 8.0 1.4 2.2 0.9 Expected Return on Plan Assets (115.7) (23.4) (28.0) (12.2) (20.3) (2.4) (9.9) (1.4) Actuarial Loss/(Gain) 22.0 3.2 6.4 1.3 (0.1) — — — Prior Service Cost/(Credit) 0.3 — 0.1 — (5.4) 0.3 (4.2) 0.1 Total Net Periodic Benefit Plan Income $ (19.5) $ (4.3) $ (6.8) $ (3.1) $ (16.1) $ (0.4) $ (11.6) $ (0.3) Intercompany Income Allocations N/A $ (0.6) $ (0.6) $ (0.2) N/A $ (0.6) $ (0.6) $ (0.2) Pension and SERP PBOP For the Nine Months Ended September 30, 2024 For the Nine Months Ended September 30, 2024 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 33.2 $ 9.5 $ 5.9 $ 3.2 $ 5.2 $ 0.9 $ 0.9 $ 0.4 Interest Cost 187.4 37.7 38.7 20.1 24.0 4.2 6.6 2.6 Expected Return on Plan Assets (347.0) (70.2) (84.3) (36.6) (61.0) (7.1) (29.7) (4.2) Actuarial Loss/(Gain) 63.9 8.9 19.2 3.7 (0.3) — — — Prior Service Cost/(Credit) 0.9 — 0.3 — (16.2) 0.8 (12.7) 0.3 Settlement Loss 4.3 — — — — — — — Total Net Periodic Benefit Plan Income $ (57.3) $ (14.1) $ (20.2) $ (9.6) $ (48.3) $ (1.2) $ (34.9) $ (0.9) Intercompany Income Allocations N/A $ (0.9) $ (0.8) $ (0.3) N/A $ (1.7) $ (1.9) $ (0.6) Pension and SERP PBOP For the Three Months Ended September 30, 2023 For the Three Months Ended September 30, 2023 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 10.7 $ 3.1 $ 1.9 $ 1.0 $ 1.9 $ 0.4 $ 0.3 $ 0.2 Interest Cost 63.4 12.6 13.5 6.8 8.5 1.5 2.3 0.9 Expected Return on Plan Assets (116.3) (23.5) (28.4) (12.3) (19.3) (2.3) (9.2) (1.4) Actuarial Loss 10.9 0.5 4.0 0.4 — — — — Prior Service Cost/(Credit) 0.3 — 0.1 — (5.4) 0.2 (4.2) 0.1 Settlement Loss 8.7 — — — — — — — Total Net Periodic Benefit Plan Income $ (22.3) $ (7.3) $ (8.9) $ (4.1) $ (14.3) $ (0.2) $ (10.8) $ (0.2) Intercompany Expense/(Income) Allocations N/A $ 0.8 $ 0.9 $ 0.3 N/A $ (0.5) $ (0.5) $ (0.2) Pension and SERP PBOP For the Nine Months Ended September 30, 2023 For the Nine Months Ended September 30, 2023 (Millions of Dollars) Eversource CL&P NSTAR PSNH Eversource CL&P NSTAR PSNH Service Cost $ 32.4 $ 9.2 $ 5.9 $ 3.2 $ 5.7 $ 1.0 $ 0.9 $ 0.6 Interest Cost 190.6 37.9 40.5 20.4 25.4 4.6 6.9 2.7 Expected Return on Plan Assets (348.7) (70.6) (85.3) (37.1) (57.9) (7.0) (27.7) (4.2) Actuarial Loss 35.0 1.9 12.9 1.2 — — — — Prior Service Cost/(Credit) 0.9 — 0.3 — (16.2) 0.8 (12.7) 0.3 Settlement Loss 12.4 — — — — — — — Total Net Periodic Benefit Plan Income $ (77.4) $ (21.6) $ (25.7) $ (12.3) $ (43.0) $ (0.6) $ (32.6) $ (0.6) Intercompany Income Allocations N/A $ (1.8) $ (1.2) $ (0.3) N/A $ (1.4) $ (1.6) $ (0.5)

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	9 Months Ended
COMMITMENTS AND CONTINGENCIES (Tables)	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Schedule of Environmental Loss Contingencies by Site	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 September 30, 2024 As of December 31, 2023 Number of Sites Reserve Number of Sites Reserve Eversource 65 $ 130.5 65 $ 128.2 CL&P 15 13.7 16 13.8 NSTAR Electric 13 6.7 12 5.4 PSNH 8 6.4 8 7.6
Schedule of Estimated Future Annual Costs of Long term Contractual Agreement	The table now includes the long-term commitments of CL&P pertaining to renewable energy purchase contracts that have now commenced significant construction activities. CL&P (Millions of Dollars) 2024 2025 2026 2027 2028 Thereafter Total Renewable Energy $ 208.8 $ 666.4 $ 743.5 $ 745.9 $ 747.6 $ 4,016.7 $ 7,128.9
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 previously-owned offshore wind investments: As of September 30, 2024 Company (Obligor) Description Maximum Exposure North East Offshore, LLC, Revolution Wind, LLC, and TurbineCo, LLC Offshore wind construction-related purchase agreements with third-party contractors (1) $ 455.3 Eversource Investment LLC, Eversource Investment Service Company LLC and South Fork Class B Member, LLC Offshore wind funding and indemnification obligations (2) 351.1 Eversource Investment LLC Letters of Credit (3) 5.3 Eversource TEI LLC South Fork Wind Tax Equity (4) 50.0 South Fork Wind, LLC Power Purchase Agreement Security (5) 7.1 Various Eversource subsidiaries Surety bonds (6) 31.1 (1) Eversource parent issued guarantees on behalf of its previously 50 percent-owned affiliate, Revolution Wind, LLC, and on behalf of TurbineCo, LLC (successor in interest to North East Offshore, LLC (NEO)), under which Eversource parent agreed to guarantee each entity’s performance of obligations under certain construction-related purchase agreements with third-party contractors, in an aggregate amount not to exceed $1.09 billion. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging between October 2024 and November 2027 and (ii) full performance of the guaranteed obligations. 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. (2) Eversource parent issued guarantees on behalf of its wholly-owned subsidiary Eversource Investment LLC (EI), which held Eversource's previous investments in offshore wind-related equity method investments until sale, and on behalf of its previously 50 percent-owned affiliate, South Fork Class B Member, LLC, whereby Eversource parent will guarantee each entity’s performance of certain funding obligations of the South Fork and Revolution Wind projects. Eversource parent also guaranteed certain indemnification obligations of EI associated with third party credit support for EI’s investment in NEO. On September 30, 2024, Eversource parent issued a guaranty on behalf of its wholly-owned subsidiary, Eversource Investment Service Company LLC, whereby Eversource parent will guarantee Eversource Investment Service Company LLC’s performance of certain indemnification obligations during the onshore construction phase of the Revolution Wind project, in an amount not to exceed $100.0 million. These guarantees will not exceed $1.62 billion and expire upon the full performance of the guaranteed obligations. (3) Eversource parent entered into a guarantee on behalf of EI, 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. As of September 30, 2024, EI has issued letters of credit on behalf of South Fork Wind, LLC and Revolution Wind, LLC totaling $5.3 million. The guarantee will remain in effect until full performance of the guaranteed obligations. (4) Eversource parent issued a guarantee on behalf of its wholly-owned subsidiary, Eversource TEI LLC, whereby Eversource parent will guarantee Eversource TEI LLC’s performance of certain obligations, in an amount not to exceed $50.0 million, in connection with any remaining obligations under the LLC agreement. Eversource parent’s obligations expire upon the full performance of the guaranteed obligations. (5) Eversource parent issued a guarantee on behalf of its previously 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 guaranteed obligations. (6) Surety bonds expire in 2024 and 2025. 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)	9 Months Ended
FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	Sep. 30, 2024
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 September 30, 2024: Preferred Stock Not Subject to Mandatory Redemption $ 155.6 $ 131.5 $ 116.2 $ 96.9 $ 43.0 $ 34.6 $ — $ — Long-Term Debt 27,413.9 26,518.4 5,250.6 5,099.2 5,093.7 4,968.0 1,731.8 1,623.6 Rate Reduction Bonds 367.3 360.1 — — — — 367.3 360.1 As of December 31, 2023: Preferred Stock Not Subject to Mandatory Redemption $ 155.6 $ 122.2 $ 116.2 $ 90.4 $ 43.0 $ 31.8 $ — $ — Long-Term Debt 24,413.5 22,855.2 4,814.4 4,572.0 4,496.9 4,273.7 1,431.6 1,292.6 Rate Reduction Bonds 410.5 395.0 — — — — 410.5 395.0

ACCUMULATED OTHER COMPREHENSI_2

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables)	9 Months Ended
ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables)	Sep. 30, 2024
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 Nine Months Ended September 30, 2024 For the Nine Months Ended September 30, 2023 Eversource (Millions of Dollars) Qualified Defined Total Qualified Unrealized Defined Total Balance as of Beginning of Period $ (0.4) $ (33.3) $ (33.7) $ (0.4) $ (1.2) $ (37.8) $ (39.4) OCI Before Reclassifications — (0.9) (0.9) — — 0.1 0.1 Amounts Reclassified from AOCI — 6.4 6.4 — 1.2 14.1 15.3 Net OCI — 5.5 5.5 — 1.2 14.2 15.4 Balance as of End of Period $ (0.4) $ (27.8) $ (28.2) $ (0.4) $ — $ (23.6) $ (24.0)

COMMON SHARES (Tables)

COMMON SHARES (Tables)	9 Months Ended
COMMON SHARES (Tables)	Sep. 30, 2024
Equity [Abstract]
Summary of 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 September 30, 2024 and December 31, 2023 Issued as of Par Value September 30, 2024 December 31, 2023 Eversource $ 5 410,000,000 373,276,991 359,984,073 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)	9 Months Ended
EARNINGS PER SHARE (Tables)	Sep. 30, 2024
Earnings Per Share [Abstract]
Components of Basic and Diluted EPS	The following table sets forth the components of basic and diluted earnings/(loss) per share: Eversource (Millions of Dollars, except share information) For the Three Months Ended For the Nine Months Ended September 30, 2024 September 30, 2023 September 30, 2024 September 30, 2023 Net (Loss)/Income Attributable to Common $ (118.1) $ 339.7 $ 739.1 $ 846.2 Weighted Average Common Shares Outstanding: Basic 359,520,518 349,704,155 354,483,338 349,461,219 Dilutive Effect 297,139 147,814 261,508 270,101 Diluted 359,817,657 349,851,969 354,744,846 349,731,320 Basic (Loss)/Earnings Per Common Share $ (0.33) $ 0.97 $ 2.09 $ 2.42 Diluted (Loss)/Earnings Per Common Share $ (0.33) $ 0.97 $ 2.08 $ 2.42

REVENUES (Tables)

REVENUES (Tables)	9 Months Ended
REVENUES (Tables)	Sep. 30, 2024
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 September 30, 2024 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,465.5 $ 86.7 $ — $ 43.7 $ — $ — $ 1,595.9 Commercial 857.8 71.0 — 18.7 — (2.5) 945.0 Industrial 111.4 31.6 — 1.3 — (5.4) 138.9 Total Retail Tariff Sales Revenues 2,434.7 189.3 — 63.7 — (7.9) 2,679.8 Wholesale Transmission Revenues — — 583.6 — — (431.1) 152.5 Wholesale Market Sales Revenues 173.8 29.0 — 1.2 — — 204.0 Other Revenues from Contracts with Customers 22.4 1.9 3.5 1.2 414.7 (412.6) 31.1 Total Revenues from Contracts with Customers 2,630.9 220.2 587.1 66.1 414.7 (851.6) 3,067.4 Alternative Revenue Programs (2.9) (3.6) (45.2) 0.6 — 41.0 (10.1) Other Revenues 4.8 0.6 0.1 0.4 — — 5.9 Total Operating Revenues $ 2,632.8 $ 217.2 $ 542.0 $ 67.1 $ 414.7 $ (810.6) $ 3,063.2 For the Nine Months Ended September 30, 2024 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 3,747.1 $ 798.3 $ — $ 111.8 $ — $ — $ 4,657.2 Commercial 2,248.5 434.5 — 53.1 — (5.7) 2,730.4 Industrial 289.0 127.0 — 3.5 — (16.5) 403.0 Total Retail Tariff Sales Revenues 6,284.6 1,359.8 — 168.4 — (22.2) 7,790.6 Wholesale Transmission Revenues — — 1,570.6 — — (1,188.8) 381.8 Wholesale Market Sales Revenues 471.1 122.2 — 3.1 — — 596.4 Other Revenues from Contracts with Customers 66.8 4.5 11.0 2.5 1,253.6 (1,247.7) 90.7 Total Revenues from Contracts with Customers 6,822.5 1,486.5 1,581.6 174.0 1,253.6 (2,458.7) 8,859.5 Alternative Revenue Programs 24.4 28.1 1.9 (0.2) — (1.7) 52.5 Other Revenues 13.9 2.1 0.4 0.9 — — 17.3 Total Operating Revenues $ 6,860.8 $ 1,516.7 $ 1,583.9 $ 174.7 $ 1,253.6 $ (2,460.4) $ 8,929.3 For the Three Months Ended September 30, 2023 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,375.9 $ 83.0 $ — $ 44.7 $ — $ — $ 1,503.6 Commercial 764.1 33.7 — 19.6 — (1.1) 816.3 Industrial 94.5 30.2 — 1.2 — (4.8) 121.1 Total Retail Tariff Sales Revenues 2,234.5 146.9 — 65.5 — (5.9) 2,441.0 Wholesale Transmission Revenues — — 520.2 — — (386.6) 133.6 Wholesale Market Sales Revenues 154.9 71.6 — 1.1 — — 227.6 Other Revenues from Contracts with Customers 20.9 1.3 4.8 2.0 394.7 (392.4) 31.3 Total Revenues from Contracts with Customers 2,410.3 219.8 525.0 68.6 394.7 (784.9) 2,833.5 Alternative Revenue Programs (43.8) (2.4) (33.6) (0.3) — 31.9 (48.2) Other Revenues 4.8 0.9 0.2 0.3 — — 6.2 Total Operating Revenues $ 2,371.3 $ 218.3 $ 491.6 $ 68.6 $ 394.7 $ (753.0) $ 2,791.5 For the Nine Months Ended September 30, 2023 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Revenues from Contracts with Customers Retail Tariff Sales Residential $ 3,982.1 $ 858.0 $ — $ 112.6 $ — $ — $ 4,952.7 Commercial 2,244.7 483.6 — 53.2 — (3.4) 2,778.1 Industrial 268.5 141.7 — 3.4 — (14.6) 399.0 Total Retail Tariff Sales Revenues 6,495.3 1,483.3 — 169.2 — (18.0) 8,129.8 Wholesale Transmission Revenues — — 1,358.2 — — (1,015.6) 342.6 Wholesale Market Sales Revenues 484.4 160.5 — 2.9 — — 647.8 Other Revenues from Contracts with Customers 60.1 3.9 14.1 6.1 1,217.3 (1,210.7) 90.8 Total Revenues from Contracts with Customers 7,039.8 1,647.7 1,372.3 178.2 1,217.3 (2,244.3) 9,211.0 Alternative Revenue Programs (40.7) 21.9 57.6 (2.0) — (50.8) (14.0) Other Revenues 15.2 3.0 0.5 0.8 — — 19.5 Total Operating Revenues $ 7,014.3 $ 1,672.6 $ 1,430.4 $ 177.0 $ 1,217.3 $ (2,295.1) $ 9,216.5 For the Three Months Ended September 30, 2024 For the Three Months Ended September 30, 2023 (Millions of Dollars) CL&P NSTAR Electric PSNH CL&P NSTAR Electric PSNH Revenues from Contracts with Customers Retail Tariff Sales Residential $ 757.1 $ 530.8 $ 177.6 $ 703.9 $ 480.5 $ 191.5 Commercial 349.9 416.9 91.4 286.4 389.4 88.7 Industrial 51.2 32.9 27.3 39.0 31.9 23.6 Total Retail Tariff Sales Revenues 1,158.2 980.6 296.3 1,029.3 901.8 303.8 Wholesale Transmission Revenues 262.2 212.3 109.1 245.1 186.4 88.7 Wholesale Market Sales Revenues 134.1 31.8 7.9 112.8 28.6 13.5 Other Revenues from Contracts with Customers 9.1 12.1 5.2 9.0 12.4 5.0 Total Revenues from Contracts with Customers 1,563.6 1,236.8 418.5 1,396.2 1,129.2 411.0 Alternative Revenue Programs (46.5) 8.1 (9.7) (49.3) (29.0) 0.9 Other Revenues 2.4 2.0 0.5 2.4 1.9 0.7 Eliminations (174.2) (169.4) (67.3) (159.2) (148.6) (59.5) Total Operating Revenues $ 1,345.3 $ 1,077.5 $ 342.0 $ 1,190.1 $ 953.5 $ 353.1 For the Nine Months Ended September 30, 2024 For the Nine Months Ended September 30, 2023 (Millions of Dollars) CL&P NSTAR Electric PSNH CL&P NSTAR Electric PSNH Revenues from Contracts with Customers Retail Tariff Sales Residential $ 1,897.7 $ 1,373.2 $ 476.2 $ 2,059.9 $ 1,318.7 $ 603.5 Commercial 850.2 1,144.8 254.6 836.7 1,121.0 287.5 Industrial 117.0 93.1 78.9 104.1 95.7 68.7 Total Retail Tariff Sales Revenues 2,864.9 2,611.1 809.7 3,000.7 2,535.4 959.7 Wholesale Transmission Revenues 681.7 602.0 286.9 613.3 521.0 223.9 Wholesale Market Sales Revenues 352.8 90.3 28.0 330.4 102.1 51.9 Other Revenues from Contracts with Customers 27.0 36.5 15.9 27.8 36.0 12.2 Total Revenues from Contracts with Customers 3,926.4 3,339.9 1,140.5 3,972.2 3,194.5 1,247.7 Alternative Revenue Programs 4.9 20.1 1.3 28.0 (43.5) 32.4 Other Revenues 6.7 5.6 2.0 7.1 6.3 2.3 Eliminations (506.8) (495.4) (188.3) (444.1) (428.5) (159.1) Total Operating Revenues $ 3,431.2 $ 2,870.2 $ 955.5 $ 3,563.2 $ 2,728.8 $ 1,123.3

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	9 Months Ended
SEGMENT INFORMATION (Tables)	Sep. 30, 2024
Segment Reporting [Abstract]
Summary of Segment Information and Segmented Total Assets	Eversource's segment information is as follows: For the Three Months Ended September 30, 2024 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 2,632.8 $ 217.2 $ 542.0 $ 67.1 $ 414.7 $ (810.6) $ 3,063.2 Depreciation and Amortization (420.8) (28.2) (102.0) (9.8) (52.1) 2.8 (610.1) Other Operating Expenses (1,910.7) (216.4) (163.6) (31.2) (326.6) 807.8 (1,840.7) Operating Income/(Loss) $ 301.3 $ (27.4) $ 276.4 $ 26.1 $ 36.0 $ — $ 612.4 Interest Expense $ (98.8) $ (25.2) $ (48.5) $ (8.3) $ (177.7) $ 57.9 $ (300.6) Loss on Offshore Wind Investments — — — — (464.0) — (464.0) Other Income, Net 65.8 11.4 11.8 6.2 48.8 (31.4) 112.6 Net Income/(Loss) Attributable to Common 203.5 (30.2) 174.9 23.7 (516.5) 26.5 (118.1) For the Nine Months Ended September 30, 2024 Eversource (Millions of Dollars) Electric Distribution Natural Gas Distribution Electric Transmission Water Distribution Other Eliminations Total Operating Revenues $ 6,860.8 $ 1,516.7 $ 1,583.9 $ 174.7 $ 1,253.6 $ (2,460.4) $ 8,929.3 Depreciation and Amortization (565.5) (161.4) (301.8) (21.2) (146.3) 8.1 (1,188.1) Other Operating Expenses (5,529.3) (1,066.2) (452.6) (94.2) (990.3) 2,452.3 (5,680.3) Operating Income $ 766.0 $ 289.1 $ 829.5 $ 59.3 $ 117.0 $ — $ 2,060.9 Interest Expense $ (272.2) $ (72.0) $ (135.4) $ (29.4) $ (484.8) $ 171.2 $ (822.6) Loss on Offshore Wind Investments — — — — (464.0) — (464.0) Other Income, Net 189.2 32.5 38.1 8.5 1,145.0 (1,094.4) 318.9 Net Income Attributable to Common 521.3 187.4 540.6 37.1 375.9 (923.2) 739.1 Cash Flows Used for Investments in Plant 1,309.1 697.8 985.6 119.3 180.1 — 3,291.9 For the Three Months Ended September 30, 2023 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 2,371.3 $ 218.3 $ 491.6 $ 68.6 $ 394.7 $ (753.0) $ 2,791.5 Depreciation and Amortization (0.7) (38.0) (94.5) (13.9) (40.7) 2.3 (185.5) Other Operating Expenses (2,124.0) (211.1) (144.9) (30.9) (315.7) 751.2 (2,075.4) Operating Income/(Loss) $ 246.6 $ (30.8) $ 252.2 $ 23.8 $ 38.3 $ 0.5 $ 530.6 Interest Expense $ (76.8) $ (19.7) $ (43.0) $ (9.8) $ (111.4) $ 38.4 $ (222.3) Other Income, Net 53.5 9.2 11.9 1.3 415.9 (412.7) 79.1 Net Income/(Loss) Attributable to 173.3 (33.7) 160.3 16.6 397.0 (373.8) 339.7 For the Nine Months Ended September 30, 2023 Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total Operating Revenues $ 7,014.3 $ 1,672.6 $ 1,430.4 $ 177.0 $ 1,217.3 $ (2,295.1) $ 9,216.5 Depreciation and Amortization 59.3 (156.7) (276.4) (41.3) (115.5) 6.6 (524.0) Other Operating Expenses (6,371.4) (1,280.8) (409.4) (87.5) (992.6) 2,290.0 (6,851.7) Operating Income $ 702.2 $ 235.1 $ 744.6 $ 48.2 $ 109.2 $ 1.5 $ 1,840.8 Interest Expense $ (214.4) $ (62.4) $ (126.7) $ (28.4) $ (297.0) $ 104.8 $ (624.1) Loss on Offshore Wind Investments — — — — (401.0) — (401.0) Other Income, Net 155.7 27.9 30.8 4.0 1,082.6 (1,038.0) 263.0 Net Income Attributable to Common Shareholders 504.3 148.2 476.4 27.4 621.6 (931.7) 846.2 Cash Flows Used for Investments in Plant 1,230.3 536.8 1,011.3 140.1 207.1 — 3,125.6 The following table summarizes Eversource's segmented total assets: Eversource (Millions of Dollars) Electric Natural Gas Electric Water Distribution Other Eliminations Total As of September 30, 2024 $ 31,411.3 $ 9,518.2 $ 15,750.5 $ 3,056.2 $ 27,371.0 $ (28,533.9) $ 58,573.3 As of December 31, 2023 29,426.4 8,775.3 14,806.5 2,944.8 26,337.7 (26,678.5) 55,612.2

SUMMARY OF SIGNIFICANT ACCOUN_4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands, customer in Millions						3 Months Ended				9 Months Ended		12 Months Ended
	Jul. 09, 2024 USD ($)	Apr. 18, 2024 USD ($)	Feb. 13, 2024 USD ($)	Sep. 23, 2023 USD ($)	Sep. 07, 2023 USD ($) a mile	Sep. 30, 2024 USD ($) project	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2024 USD ($) project regulatedUtility customer	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Jan. 24, 2024
Summary of Accounting Policies [Line Items]
Number of electric, natural gas and water customers \| customer										4.4
Number of offshore wind projects \| project						3				3
Payments for investment										$ 929,651	$ 887,365
Percent realized of investment tax credit			0.10
Expected value of investment tax credit			$ 170,000
Losses on Offshore Wind Investments						$ 464,019	$ 0	$ 401,000		464,019	$ 401,000	$ 1,770,000
After-tax impairment								331,000				1,620,000
Energy Relief Fund - Merrimack Valley Programs
Summary of Accounting Policies [Line Items]
Restricted cash, current						20,000				20,000		20,000
Restricted cash, noncurrent						$ 13,800				$ 13,800		$ 14,100
CL&P
Summary of Accounting Policies [Line Items]
Period of accounts receivable recoverable under financial or medical duress										180 days
Yankee Gas
Summary of Accounting Policies [Line Items]
Period of accounts receivable recoverable under financial or medical duress										90 days
Tax Equity
Summary of Accounting Policies [Line Items]
Ownership interest (percent)						50%				50%
Northeast Offshore LLC And South Fork Class B Member, LLC
Summary of Accounting Policies [Line Items]
Ownership interest (percent)						50%				50%
South Fork Wind Holdings, LLC Class A shares
Summary of Accounting Policies [Line Items]
Ownership interest (percent)						100%	100%			100%	100%
Expected value of investment tax credit										$ 459,000
Decrease in taxes payable										54,000
Increase in deferred tax assets										405,000
Uncommitted Lease Area
Summary of Accounting Policies [Line Items]
Ownership interest (percent)					50%
Uncommitted area of developable acres (in acres) \| a					175,000
Number of miles off south coast of Massachusetts \| mile					25
Payments for investment					$ 625,000
Tax Equity Capital Contribution Agreement
Summary of Accounting Policies [Line Items]
Payments for investment				$ 528,000
Sunrise Wind, LLC
Summary of Accounting Policies [Line Items]
Ownership interest (percent)	50%
Proceeds from sale of equity method investments	$ 118,000	$ 230,000				$ 377,000
Sunrise Wind, LLC \| Orsted
Summary of Accounting Policies [Line Items]
Ownership interest (percent)	50%												50%
Proceeds from sale of equity method investments	$ 152,000
Sunrise Wind, LLC \| Orsted
Summary of Accounting Policies [Line Items]
Equity method investment, remaining purchase price paid	$ 34,000
South Fork Wind And Revolution Wind
Summary of Accounting Policies [Line Items]
Ownership interest (percent)			50%
Proceeds from sale of equity method investments			$ 1,100,000			745,000
Adjustments from sale of equity method investment						375,000
Adjustment from sale of equity method investment, capital expenses						150,000
Adjustment from sale of equity method investment, non-construction costs						225,000
Percent of investment tax credit			40%
Cost sharing agreement, threshold amount			$ 240,000
Equity method investment, realized gain (loss)						(524,000)
Equity method investment, aggregate cost						350,000				350,000
Equity method investment, post-closing sale costs						326,000				326,000
Effective income tax rate reconciliation, change in enacted tax rate, amount						60,000
Equity method investment, liability obligations						$ 365,000				$ 365,000
Renewable Energy Investment Fund
Summary of Accounting Policies [Line Items]
Proceeds from sale of equity method investments								$ 23,600	$ 123,400		$ 147,000
Renewable Energy Investment Fund \| Equity Method Investee
Summary of Accounting Policies [Line Items]
Charitable contributions									$ 20,000
Connecticut, Massachusetts and New Hampshire
Summary of Accounting Policies [Line Items]
Number of regulated utilities \| regulatedUtility										12

SUMMARY OF SIGNIFICANT ACCOUN_5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Provision for Uncollectible Accounts (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 579,600	$ 532,400	$ 554,500	$ 486,300
Uncollectible Expense	29,200	16,800	55,438	40,945
Uncollectible Costs Deferred	21,400	47,900	96,400	127,500
Write-Offs	(58,100)	(57,900)	(141,600)	(123,800)
Recoveries Collected	2,600	3,500	10,000	11,800
Ending Balance	574,700	542,700	574,700	542,700
CL&P
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	308,600	262,800	296,000	225,300
Uncollectible Expense	5,100	2,400	11,432	7,106
Uncollectible Costs Deferred	(5,400)	32,500	38,000	89,600
Write-Offs	(19,600)	(22,500)	(59,400)	(50,300)
Recoveries Collected	1,100	1,100	3,800	4,600
Ending Balance	289,800	276,300	289,800	276,300
NSTAR Electric
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	106,200	97,800	97,000	95,000
Uncollectible Expense	15,700	5,200	27,746	12,988
Uncollectible Costs Deferred	18,300	7,900	30,900	19,600
Write-Offs	(22,200)	(11,400)	(39,700)	(30,800)
Recoveries Collected	300	1,300	2,400	4,000
Ending Balance	118,300	100,800	118,300	100,800
PSNH
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	14,100	12,700	14,300	29,200
Uncollectible Expense	1,200	2,000	3,420	1,534
Uncollectible Costs Deferred	1,400	1,100	3,800	(11,100)
Write-Offs	(3,200)	(3,600)	(8,400)	(7,800)
Recoveries Collected	200	200	600	600
Ending Balance	13,700	12,400	13,700	12,400
Hardship Accounts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	389,100	338,200	366,800	284,400
Uncollectible Expense	0	0	0	0
Uncollectible Costs Deferred	5,400	33,900	58,900	104,700
Write-Offs	(16,800)	(17,500)	(48,500)	(35,300)
Recoveries Collected	100	200	600	1,000
Ending Balance	377,800	354,800	377,800	354,800
Hardship Accounts \| CL&P
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	274,400	226,500	259,700	188,900
Uncollectible Expense	0	0	0	0
Uncollectible Costs Deferred	(8,800)	29,400	29,300	80,300
Write-Offs	(12,200)	(14,900)	(36,000)	(29,000)
Recoveries Collected	100	200	500	1,000
Ending Balance	253,500	241,200	253,500	241,200
Hardship Accounts \| NSTAR Electric
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	45,900	45,600	43,600	43,700
Uncollectible Expense	0	0	0	0
Uncollectible Costs Deferred	10,100	3,400	13,600	5,800
Write-Offs	(1,900)	100	(3,100)	(400)
Recoveries Collected	0	0	0	0
Ending Balance	54,100	49,100	54,100	49,100
Retail (Non-Hardship), Wholesale, and Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	190,500	194,200	187,700	201,900
Uncollectible Expense	29,200	16,800	55,400	40,900
Uncollectible Costs Deferred	16,000	14,000	37,500	22,800
Write-Offs	(41,300)	(40,400)	(93,100)	(88,500)
Recoveries Collected	2,500	3,300	9,400	10,800
Ending Balance	196,900	187,900	196,900	187,900
Retail (Non-Hardship), Wholesale, and Other \| CL&P
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	34,200	36,300	36,300	36,400
Uncollectible Expense	5,100	2,400	11,400	7,100
Uncollectible Costs Deferred	3,400	3,100	8,700	9,300
Write-Offs	(7,400)	(7,600)	(23,400)	(21,300)
Recoveries Collected	1,000	900	3,300	3,600
Ending Balance	36,300	35,100	36,300	35,100
Retail (Non-Hardship), Wholesale, and Other \| NSTAR Electric
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	60,300	52,200	53,400	51,300
Uncollectible Expense	15,700	5,200	27,700	13,000
Uncollectible Costs Deferred	8,200	4,500	17,300	13,800
Write-Offs	(20,300)	(11,500)	(36,600)	(30,400)
Recoveries Collected	300	1,300	2,400	4,000
Ending Balance	$ 64,200	$ 51,700	$ 64,200	$ 51,700

SUMMARY OF SIGNIFICANT ACCOUN_6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Components of Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Summary of Accounting Policies [Line Items]
Other income, net	$ 112,555		$ 79,123	$ 318,870	$ 262,980
Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other income, net	31,600		28,500	89,400	96,600
AFUDC Equity
Summary of Accounting Policies [Line Items]
Other income, net	22,700		21,000	73,200	55,500
Equity in Earnings of Unconsolidated Affiliates
Summary of Accounting Policies [Line Items]
Other income, net	17,100		2,700	48,100	11,500
Investment (Loss)/Income
Summary of Accounting Policies [Line Items]
Other income, net	(2,100)		2,700	(1,800)	(400)
Interest Income
Summary of Accounting Policies [Line Items]
Other income, net	38,900		24,100	106,000	68,600
Other
Summary of Accounting Policies [Line Items]
Other income, net	4,400		100	4,000	31,200
Equity in Earnings
Summary of Accounting Policies [Line Items]
Unrealized gain associated with investment		$ 23,400
CL&P
Summary of Accounting Policies [Line Items]
Other income, net	21,944		18,311	61,389	46,610
CL&P \| Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other income, net	7,700		7,000	21,400	24,900
CL&P \| AFUDC Equity
Summary of Accounting Policies [Line Items]
Other income, net	5,400		5,200	16,900	13,900
CL&P \| Equity in Earnings of Unconsolidated Affiliates
Summary of Accounting Policies [Line Items]
Other income, net	0		0	0	0
CL&P \| Investment (Loss)/Income
Summary of Accounting Policies [Line Items]
Other income, net	(900)		1,500	(1,700)	(200)
CL&P \| Interest Income
Summary of Accounting Policies [Line Items]
Other income, net	9,700		4,600	24,800	8,000
CL&P \| Other
Summary of Accounting Policies [Line Items]
Other income, net	0		0	0	0
NSTAR Electric
Summary of Accounting Policies [Line Items]
Other income, net	47,489		39,908	143,024	120,690
NSTAR Electric \| Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other income, net	13,900		12,900	39,500	41,700
NSTAR Electric \| AFUDC Equity
Summary of Accounting Policies [Line Items]
Other income, net	13,000		12,500	44,400	34,000
NSTAR Electric \| Equity in Earnings of Unconsolidated Affiliates
Summary of Accounting Policies [Line Items]
Other income, net	200		100	600	300
NSTAR Electric \| Investment (Loss)/Income
Summary of Accounting Policies [Line Items]
Other income, net	(200)		700	700	500
NSTAR Electric \| Interest Income
Summary of Accounting Policies [Line Items]
Other income, net	20,600		13,600	57,800	44,000
NSTAR Electric \| Other
Summary of Accounting Policies [Line Items]
Other income, net	0		100	0	200
PSNH
Summary of Accounting Policies [Line Items]
Other income, net	8,097		7,180	22,919	19,199
PSNH \| Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other income, net	3,900		3,700	11,200	11,800
PSNH \| AFUDC Equity
Summary of Accounting Policies [Line Items]
Other income, net	1,500		1,600	5,100	3,400
PSNH \| Equity in Earnings of Unconsolidated Affiliates
Summary of Accounting Policies [Line Items]
Other income, net	0		0	0	0
PSNH \| Investment (Loss)/Income
Summary of Accounting Policies [Line Items]
Other income, net	(300)		400	(500)	0
PSNH \| Interest Income
Summary of Accounting Policies [Line Items]
Other income, net	3,000		1,500	7,100	3,600
PSNH \| Other
Summary of Accounting Policies [Line Items]
Other income, net	$ 0		$ 0	$ 0	$ 400

SUMMARY OF SIGNIFICANT ACCOUN_7

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Investments in Unconsolidated Affiliates (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 166,418	$ 660,473
Offshore Wind Business
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 22,200	515,500
Offshore Wind Business \| Minimum
Schedule of Equity Method Investments [Line Items]
Ownership interest (percent)	50%
Offshore Wind Business \| Maximum
Schedule of Equity Method Investments [Line Items]
Ownership interest (percent)	100%
Natural Gas Pipeline - Algonquin Gas Transmission, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (percent)	15%
Investments in unconsolidated affiliates	$ 113,500	116,000
Other
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 30,700	$ 29,000

SUMMARY OF SIGNIFICANT ACCOUN_8

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Schedule of Gross Tax Receipts [Line Items]
Gross receipts taxes	$ 59.3	$ 53.7	$ 157.2	$ 153.4
CL&P
Schedule of Gross Tax Receipts [Line Items]
Gross receipts taxes	$ 56	$ 50.2	$ 139.6	$ 132.2

SUMMARY OF SIGNIFICANT ACCOUN_9

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Non-cash Investing Activities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Schedule of Supplemental Cash Flow [Line Items]
Plant additions included in accounts payable	$ 458.6	$ 462.4
CL&P
Schedule of Supplemental Cash Flow [Line Items]
Plant additions included in accounts payable	73	86.3
NSTAR Electric
Schedule of Supplemental Cash Flow [Line Items]
Plant additions included in accounts payable	164.8	135.9
PSNH
Schedule of Supplemental Cash Flow [Line Items]
Plant additions included in accounts payable	$ 67.5	$ 71.9

SUMMARY OF SIGNIFICANT ACCOU_10

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Cash Balances to Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and Cash Equivalents as reported on the Balance Sheets	$ 97,900	$ 53,900
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	202,801	166,418	$ 180,907	$ 521,752
Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	66,500	81,500
Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	21,500	13,700
Other Long-Term Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	16,900	17,300
CL&P
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and Cash Equivalents as reported on the Balance Sheets	10,116	10,213
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	11,117	12,243	18,943	20,327
CL&P \| Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	1,000	2,000
CL&P \| Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	0
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 and Cash Equivalents as reported on the Balance Sheets	4,467	6,740
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	15,968	22,785	14,846	345,293
NSTAR Electric \| Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	11,500	16,100
NSTAR Electric \| Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	0
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 and Cash Equivalents as reported on the Balance Sheets	4,673	240
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	26,693	35,004	$ 55,307	$ 36,812
PSNH \| Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	18,900	31,600
PSNH \| Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	0
PSNH \| Other Long-Term Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 3,100	$ 3,200

REGULATORY ACCOUNTING - Compone

REGULATORY ACCOUNTING - Components of Regulatory Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Regulatory Assets [Line Items]
Total Regulatory Assets	$ 7,018,000	$ 6,389,200
Less: Current Portion	2,024,897	1,674,196
Total Long-Term Regulatory Assets	4,993,145	4,714,970
Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	2,077,200	1,785,900
Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	1,638,100	1,319,200
Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	1,096,000	1,117,300
Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	944,900	912,400
Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	360,100	392,500
Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	251,500	264,100
Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	147,000	137,900
Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	72,600	120,900
Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	430,600	339,000
CL&P
Regulatory Assets [Line Items]
Total Regulatory Assets	2,426,700	2,143,200
Less: Current Portion	672,835	480,369
Total Long-Term Regulatory Assets	1,753,887	1,662,778
CL&P \| Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	998,300	896,600
CL&P \| Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	529,300	354,500
CL&P \| Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	198,200	197,400
CL&P \| Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	522,700	512,600
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 \| Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	40,500	38,500
CL&P \| Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	72,600	120,900
CL&P \| Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	65,100	22,700
NSTAR Electric
Regulatory Assets [Line Items]
Total Regulatory Assets	2,049,800	1,957,900
Less: Current Portion	778,916	676,083
Total Long-Term Regulatory Assets	1,270,882	1,281,836
NSTAR Electric \| Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	626,300	609,100
NSTAR Electric \| Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	572,600	482,900
NSTAR Electric \| Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	313,800	336,700
NSTAR Electric \| Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	141,600	128,600
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	215,900	226,700
NSTAR Electric \| Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	76,800	72,300
NSTAR Electric \| Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
NSTAR Electric \| Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	102,800	101,600
PSNH
Regulatory Assets [Line Items]
Total Regulatory Assets	1,075,200	963,300
Less: Current Portion	170,501	189,450
Total Long-Term Regulatory Assets	904,717	773,783
PSNH \| Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	452,600	280,200
PSNH \| Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	153,900	182,200
PSNH \| Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	79,700	79,300
PSNH \| Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	19,100	16,400
PSNH \| Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	360,100	392,500
PSNH \| Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
PSNH \| Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	5,000	4,700
PSNH \| Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
PSNH \| Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	$ 4,800	$ 8,000

REGULATORY ACCOUNTING - Narrati

REGULATORY ACCOUNTING - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved	$ 216.6	$ 241.7
Regulatory costs	86.3	82.1
CL&P
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved	115.9	166.7
Regulatory costs	46.7	64
NSTAR Electric
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved	39.1	21.9
Regulatory costs	21.5	7.3
PSNH
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved	$ 2.6	$ 1.2

REGULATORY ACCOUNTING - Compo_2

REGULATORY ACCOUNTING - Components of Regulatory Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	$ 4,847,300	$ 4,614,700
Less: Current Portion	722,495	591,750
Total Long-Term Regulatory Liabilities	4,124,761	4,022,923
EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	2,512,200	2,548,600
Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	789,800	668,300
Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	740,400	666,600
Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	409,300	354,000
AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	148,400	124,300
Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	34,900	51,000
Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	212,300	201,900
CL&P
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	1,509,800	1,418,100
Less: Current Portion	139,455	102,239
Total Long-Term Regulatory Liabilities	1,370,302	1,315,928
CL&P \| EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	960,100	969,200
CL&P \| Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	188,200	154,000
CL&P \| Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	197,500	157,900
CL&P \| Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	58,800	49,900
CL&P \| AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	63,200	56,100
CL&P \| Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	400	600
CL&P \| Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	41,600	30,400
NSTAR Electric
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	2,092,600	1,953,400
Less: Current Portion	468,756	368,070
Total Long-Term Regulatory Liabilities	1,623,764	1,585,311
NSTAR Electric \| EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	885,200	905,100
NSTAR Electric \| Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	446,900	347,200
NSTAR Electric \| Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	448,100	420,900
NSTAR Electric \| Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	202,800	175,900
NSTAR Electric \| AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	85,200	68,200
NSTAR Electric \| Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	10,400	22,200
NSTAR Electric \| Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	14,000	13,900
PSNH
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	500,600	511,100
Less: Current Portion	106,761	117,515
Total Long-Term Regulatory Liabilities	393,847	393,574
PSNH \| EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	333,700	339,300
PSNH \| Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	99,800	114,400
PSNH \| Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	21,100	16,200
PSNH \| Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	41,100	36,600
PSNH \| AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
PSNH \| Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
PSNH \| Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	$ 4,900	$ 4,600

PROPERTY, PLANT AND EQUIPMENT_3

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION - Summary of Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Public Utility, Property, Plant and Equipment [Line Items]
Distribution - Electric	$ 20,766,100	$ 19,656,500
Distribution - Natural Gas	8,569,300	8,155,300
Transmission - Electric	15,679,100	14,666,800
Distribution - Water	2,319,200	2,280,100
Solar	201,100	201,100
Utility	47,534,800	44,959,800
Other	2,233,900	2,006,800
Property, Plant and Equipment, Gross	49,768,700	46,966,600
Less: Accumulated Depreciation
Utility	(10,137,900)	(9,670,100)
Other	(1,003,500)	(869,600)
Total Accumulated Depreciation	(11,141,400)	(10,539,700)
Property, Plant and Equipment, Net	38,627,300	36,426,900
Construction Work in Progress	3,284,200	3,071,700
Total Property, Plant and Equipment, Net	41,911,467	39,498,607
CL&P
Public Utility, Property, Plant and Equipment [Line Items]
Distribution - Electric	8,336,400	7,897,100
Transmission - Electric	6,804,100	6,548,200
Solar	0	0
Property, Plant and Equipment, Gross	15,140,500	14,445,300
Less: Accumulated Depreciation
Total Accumulated Depreciation	(2,874,100)	(2,670,500)
Property, Plant and Equipment, Net	12,266,400	11,774,800
Construction Work in Progress	563,400	565,400
Total Property, Plant and Equipment, Net	12,829,760	12,340,192
NSTAR Electric
Public Utility, Property, Plant and Equipment [Line Items]
Distribution - Electric	9,558,100	9,000,500
Transmission - Electric	6,183,700	5,630,800
Solar	201,100	201,100
Property, Plant and Equipment, Gross	15,942,900	14,832,400
Less: Accumulated Depreciation
Total Accumulated Depreciation	(3,719,700)	(3,585,900)
Property, Plant and Equipment, Net	12,223,200	11,246,500
Construction Work in Progress	1,404,000	1,507,300
Total Property, Plant and Equipment, Net	13,627,246	12,753,787
PSNH
Public Utility, Property, Plant and Equipment [Line Items]
Distribution - Electric	2,911,900	2,799,200
Transmission - Electric	2,692,900	2,489,500
Solar	0	0
Property, Plant and Equipment, Gross	5,604,800	5,288,700
Less: Accumulated Depreciation
Total Accumulated Depreciation	(1,014,200)	(984,000)
Property, Plant and Equipment, Net	4,590,600	4,304,700
Construction Work in Progress	368,300	270,000
Total Property, Plant and Equipment, Net	$ 4,958,890	$ 4,574,652

DERIVATIVE INSTRUMENTS - Gross

DERIVATIVE INSTRUMENTS - Gross Fair Values and Net Amounts of Contracts (Details) - CL&P - Level 2 - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Derivative Assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Commodity Supply and Price Risk Management	$ 15.5	$ 16.4
Netting	(0.4)	(0.5)
Net Amount Recorded as a Derivative	15.1	15.9
Long-Term Derivative Assets
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Commodity Supply and Price Risk Management	2.5	13.6
Netting	(0.2)	(0.5)
Net Amount Recorded as a Derivative	2.3	13.1
Current Derivative Liabilities
Current and Long-Term Derivative Liabilities
Commodity Supply and Price Risk Management	(77.5)	(81.9)
Netting	0	0
Net Amount Recorded as a Derivative	(77.5)	(81.9)
Long-Term Derivative Liabilities
Current and Long-Term Derivative Liabilities
Commodity Supply and Price Risk Management	(12.5)	(68)
Netting	0	0
Net Amount Recorded as a Derivative	$ (12.5)	$ (68)

DERIVATIVE INSTRUMENTS - Narrat

DERIVATIVE INSTRUMENTS - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
DERIVATIVE INSTRUMENTS - Narrative (Details) $ in Millions	Sep. 30, 2024 USD ($) MW	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) MW	Sep. 30, 2023 USD ($)	Dec. 31, 2023 MW
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of costs or benefits borne under capacity-related contracts by United Illuminated Company (in percent)			20%
Amount of power to be purchased under capacity-related contract (in MW) \| MW	615		615		682
CL&P
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of costs or benefits borne under capacity-related contracts (in percent)			80%
Derivative instruments losses recognized in regulatory asset liability \| $	$ 0.5	$ 1.5	$ 3.4	$ 1.6

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 2 - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Derivatives, Net [Rollforward]
Fair Value as of Beginning of Period	$ (152.1)	$ (181.8)
Net Realized/Unrealized Losses Included in Regulatory Assets	(1.5)	(1.6)
Settlements	17	46.8
Fair Value as of End of Period	$ (136.6)	$ (136.6)

MARKETABLE SECURITIES - Narrati

MARKETABLE SECURITIES - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
MARKETABLE SECURITIES - Narrative (Details) - USD ($)	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Available-for-sale equity securities	$ 4,000,000		$ 4,000,000		$ 3,300,000
Equity securities, realized gain				$ 1,100,000
Unrealized gains recorded in other income	200,000		700,000	300,000
Credit loss	0	$ 0	0	0
Allowance for credit loss	0		0
Unrealized Gains/(Losses) on Marketable Securities
Debt Securities, Available-for-sale [Line Items]
Losses recorded on securities intended to be sold				$ 1,200,000
CYAPC and YAEC
Debt Securities, Available-for-sale [Line Items]
Available-for-sale equity securities	$ 166,300,000		$ 166,300,000		$ 173,600,000

MARKETABLE SECURITIES - Summary

MARKETABLE SECURITIES - Summary of Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Amortized Cost	$ 176.9	$ 169.5
Pre-Tax Unrealized Gains	1.1	1.4
Pre-Tax Unrealized Losses	(5.1)	(6.6)
Fair Value	$ 172.9	$ 164.3

MARKETABLE SECURITIES - Contrac

MARKETABLE SECURITIES - Contractual Maturities of Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost
Less than one year	$ 24.7
One to five years	33.7
Six to ten years	41
Greater than ten years	77.5
Amortized Cost	176.9	$ 169.5
Fair Value
Less than one year	24.7
One to five years	33.9
Six to ten years	41.2
Greater than ten years	73.1
Fair Value	$ 172.9	$ 164.3

MARKETABLE SECURITIES - Marketa

MARKETABLE SECURITIES - Marketable Securities Recorded at Fair Value on a Recurring Basis by Level (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 343.2	$ 341.2
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	191.8	190.6
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	151.4	150.6
Mutual Funds and Equities \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	170.3	176.9
Money Market Funds \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	21.5	13.7
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	90.1	90.1
Corporate Debt Securities \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	35.9	34
Asset-Backed Debt Securities \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	8.2	5.6
Municipal Bonds \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	7.4	9.8
Other Fixed Income Securities \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 9.8	$ 11.1

SHORT-TERM AND LONG-TERM DEBT -

SHORT-TERM AND LONG-TERM DEBT - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2024	Aug. 12, 2024	Jul. 24, 2024	May 01, 2024	Feb. 08, 2024	Dec. 31, 2023
Line of Credit Facility [Line Items]
Long-Term Debt	$ 25,971,408,000					$ 23,588,616,000
NSTAR Electric
Line of Credit Facility [Line Items]
Long-Term Debt	5,093,701,000					4,496,947,000
CL&P
Line of Credit Facility [Line Items]
Long-Term Debt	5,110,791,000					4,814,429,000
Notes payable to Eversource parent	135,000,000					249,670,000
CL&P \| Related Party
Line of Credit Facility [Line Items]
Long-Term Debt						207,300,000
Notes payable to Eversource parent	135,000,000					457,000,000
PSNH
Line of Credit Facility [Line Items]
Long-Term Debt	1,731,764,000					1,431,591,000
Notes payable to Eversource parent	89,300,000					233,000,000
PSNH \| Related Party
Line of Credit Facility [Line Items]
Notes payable to Eversource parent	89,300,000					233,000,000
Line of Credit \| NSTAR Electric
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 2,400,000,000
Line of Credit \| CL&P
Line of Credit Facility [Line Items]
Maximum borrowing capacity	375,000,000		$ 1,000,000,000
Amount outstanding under line of credit	0
Line of Credit \| PSNH
Line of Credit Facility [Line Items]
Maximum borrowing capacity	250,000,000				$ 300,000,000
Amount outstanding under line of credit	0
Line of Credit \| Eversource Gas Company of Massachusetts
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
Commercial Paper \| CL&P
Line of Credit Facility [Line Items]
Long-Term Debt						207,300,000
Commercial Paper \| Eversource Gas Company of Massachusetts
Line of Credit Facility [Line Items]
Long-Term Debt	100,000,000
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 (in years)	5 years
NSTAR Electric \| Line of Credit \| NSTAR Electric
Line of Credit Facility [Line Items]
Debt instrument term (in years)	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	Sep. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Borrowings outstanding	$ 322	$ 1,771.9
Available borrowing capacity	$ 1,678	$ 228.1
Weighted-average interest rate (in percent)	5.12%	5.60%
NSTAR Electric
Debt Instrument [Line Items]
Borrowings outstanding	$ 537.5	$ 365.8
Available borrowing capacity	$ 112.5	$ 284.2
Weighted-average interest rate (in percent)	4.94%	5.40%

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							9 Months Ended
	Oct. 31, 2024	Aug. 31, 2024	Jul. 31, 2024	Jun. 30, 2024	May 31, 2024	Apr. 30, 2024	Jan. 31, 2024	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Retirement of Long-Term Debt								$ (1,260,148)	$ (1,203,000)
Senior Notes \| Eversource Parent Series DD Senior Notes \| Eversource Parent
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)							5%
Issuances							$ 350,000
Senior Notes \| Eversource Parent Series EE Senior Notes \| Eversource Parent
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)							5.50%
Issuances							$ 650,000
Senior Notes \| Eversource Parent Series FF Senior Notes \| Eversource Parent
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)						5.85%
Issuances						$ 700,000
Senior Notes \| Eversource Parent Series GG Senior Notes \| Eversource Parent
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)						5.95%
Issuances						$ 700,000
Senior Notes \| Eversource Parent Series X Senior Notes \| Eversource Parent
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)				4.20%
Retirement of Long-Term Debt				$ (900,000)
Senior Notes \| Eversource Parent Series L Senior Notes \| Eversource Parent \| Subsequent Event
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	2.90%
Retirement of Long-Term Debt	$ (450,000)
CL&P
Debt Instrument [Line Items]
Retirement of Long-Term Debt								$ 0	$ (400,000)
CL&P \| First Mortgage \| CL&P Series A First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)							4.65%
Issuances							$ 350,000
CL&P \| First Mortgage \| CL&P Series B First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)		4.95%
Issuances		$ 300,000
CL&P \| First Mortgage \| CL&P Series D First Mortgage Bonds \| Subsequent Event
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	7.875%
Retirement of Long-Term Debt	$ (139,800)
PSNH \| First Mortgage \| PSNH Series X First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)						5.35%
Issuances						$ 300,000
NSTAR Electric \| Unsecured Debt \| NSTAR Electric Debentures
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)					5.40%
Issuances					$ 600,000
NSTAR Gas \| First Mortgage \| NSTAR Gas Series W First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)				5.29%
Issuances				$ 160,000
NSTAR Gas \| First Mortgage \| NSTAR Gas Series X First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)				5.48%
Issuances				$ 40,000
Yankee Gas \| First Mortgage \| Yankee Gas Series W First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)			5.50%
Issuances			$ 90,000
Yankee Gas \| First Mortgage \| Yankee Gas Series X First Mortgage Bonds
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)			5.74%
Issuances			$ 90,000
Yankee Gas \| First Mortgage \| Yankee Gas Series P First Mortgage Bonds \| Subsequent Event
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	2.23%
Retirement of Long-Term Debt	$ (100,000)
Eversource Gas Company of Massachusetts \| First Mortgage \| EGMA Series E First Mortgage Bonds \| Subsequent Event
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)	5.17%
Issuances	$ 100,000
Aquarion Company and its Subsidiaries \| Senior Notes \| Aquarion Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)		4%
Retirement of Long-Term Debt		$ (360,000)
Aquarion Company and its Subsidiaries \| Senior Notes \| Aquarion Water Company of Connecticut Senior Notes
Debt Instrument [Line Items]
Interest rate, stated percentage (in percent)		5.57%
Issuances		$ 70,000

RATE REDUCTION BONDS AND VARI_3

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Narrative (Details) - PSNH - Rate Reduction Bonds $ in Millions	May 31, 2018 USD ($)
Debt Instrument [Line Items]
Amount of securitized rate reduction bonds issued	$ 635.7
Weighted average interest rate (in percent)	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	Sep. 30, 2024	Dec. 31, 2023
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	$ 7,018,000	$ 6,389,200
Regulatory Liabilities	4,124,761	4,022,923
Accrued Interest (included in Other Current Liabilities)	781,871	821,404
Rate Reduction Bonds - Current Portion	43,210	43,210
Rate Reduction Bonds - Long-Term Portion	324,072	367,282
Securitized Stranded Costs
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	360,100	392,500
Other Regulatory Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	430,600	339,000
Current Derivative Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	66,500	81,500
Other Long-Term Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	16,900	17,300
PSNH
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	1,075,200	963,300
Regulatory Liabilities	393,847	393,574
Accrued Interest (included in Other Current Liabilities)	50,269	46,545
Rate Reduction Bonds - Current Portion	43,210	43,210
Rate Reduction Bonds - Long-Term Portion	324,072	367,282
PSNH \| VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Rate Reduction Bonds - Current Portion	43,200	43,200
Rate Reduction Bonds - Long-Term Portion	324,100	367,300
PSNH \| Securitized Stranded Costs
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	360,100	392,500
PSNH \| Securitized Stranded Costs \| VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	360,100	392,500
PSNH \| Other Regulatory Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	4,800	8,000
PSNH \| Other Regulatory Assets \| VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Regulatory Liabilities	7,500	5,300
Accrued Interest (included in Other Current Liabilities)	2,300	6,300
PSNH \| Current Derivative Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	18,900	31,600
PSNH \| Current Derivative Assets \| VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	17,300	30,000
PSNH \| Other Long-Term Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	3,100	3,200
PSNH \| Other Long-Term Assets \| VIE
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	$ 3,100	$ 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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Condensed Income Statements, Captions [Line Items]
Interest Expense on RRB Principal (included in Interest Expense)	$ 300,600	$ 222,300	$ 822,600	$ 624,100
PSNH
Condensed Income Statements, Captions [Line Items]
Amortization of RRB Principal (included in Amortization of Regulatory Assets/(Liabilities), Net)	(51,881)	9,963	(101,874)	35,234
PSNH \| VIE \| Rate Reduction Bonds
Condensed Income Statements, Captions [Line Items]
Amortization of RRB Principal (included in Amortization of Regulatory Assets/(Liabilities), Net)	10,800	10,800	32,400	32,400
Interest Expense on RRB Principal (included in Interest Expense)	$ 3,500	$ 3,900	$ 10,800	$ 11,900

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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension and SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 11.2	$ 10.7	$ 33.2	$ 32.4
Interest Cost	62.7	63.4	187.4	190.6
Expected Return on Plan Assets	(115.7)	(116.3)	(347)	(348.7)
Actuarial Loss/(Gain)	22	10.9	63.9	35
Prior Service Cost/(Credit)	0.3	0.3	0.9	0.9
Settlement Loss		8.7	4.3	12.4
Total Net Periodic Benefit Plan Income	(19.5)	(22.3)	(57.3)	(77.4)
PBOP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	1.7	1.9	5.2	5.7
Interest Cost	8	8.5	24	25.4
Expected Return on Plan Assets	(20.3)	(19.3)	(61)	(57.9)
Actuarial Loss/(Gain)	(0.1)	0	(0.3)	0
Prior Service Cost/(Credit)	(5.4)	(5.4)	(16.2)	(16.2)
Settlement Loss		0	0	0
Total Net Periodic Benefit Plan Income	(16.1)	(14.3)	(48.3)	(43)
CL&P \| Pension and SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	3.3	3.1	9.5	9.2
Interest Cost	12.6	12.6	37.7	37.9
Expected Return on Plan Assets	(23.4)	(23.5)	(70.2)	(70.6)
Actuarial Loss/(Gain)	3.2	0.5	8.9	1.9
Prior Service Cost/(Credit)	0	0	0	0
Settlement Loss		0	0	0
Total Net Periodic Benefit Plan Income	(4.3)	(7.3)	(14.1)	(21.6)
Intercompany Income Allocations	(0.6)	0.8	(0.9)	(1.8)
CL&P \| PBOP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.3	0.4	0.9	1
Interest Cost	1.4	1.5	4.2	4.6
Expected Return on Plan Assets	(2.4)	(2.3)	(7.1)	(7)
Actuarial Loss/(Gain)	0	0	0	0
Prior Service Cost/(Credit)	0.3	0.2	0.8	0.8
Settlement Loss		0	0	0
Total Net Periodic Benefit Plan Income	(0.4)	(0.2)	(1.2)	(0.6)
Intercompany Income Allocations	(0.6)	(0.5)	(1.7)	(1.4)
NSTAR Electric \| Pension and SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	1.9	1.9	5.9	5.9
Interest Cost	12.8	13.5	38.7	40.5
Expected Return on Plan Assets	(28)	(28.4)	(84.3)	(85.3)
Actuarial Loss/(Gain)	6.4	4	19.2	12.9
Prior Service Cost/(Credit)	0.1	0.1	0.3	0.3
Settlement Loss		0	0	0
Total Net Periodic Benefit Plan Income	(6.8)	(8.9)	(20.2)	(25.7)
Intercompany Income Allocations	(0.6)	0.9	(0.8)	(1.2)
NSTAR Electric \| PBOP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.3	0.3	0.9	0.9
Interest Cost	2.2	2.3	6.6	6.9
Expected Return on Plan Assets	(9.9)	(9.2)	(29.7)	(27.7)
Actuarial Loss/(Gain)	0	0	0	0
Prior Service Cost/(Credit)	(4.2)	(4.2)	(12.7)	(12.7)
Settlement Loss		0	0	0
Total Net Periodic Benefit Plan Income	(11.6)	(10.8)	(34.9)	(32.6)
Intercompany Income Allocations	(0.6)	(0.5)	(1.9)	(1.6)
PSNH \| Pension and SERP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	1.1	1	3.2	3.2
Interest Cost	6.7	6.8	20.1	20.4
Expected Return on Plan Assets	(12.2)	(12.3)	(36.6)	(37.1)
Actuarial Loss/(Gain)	1.3	0.4	3.7	1.2
Prior Service Cost/(Credit)	0	0	0	0
Settlement Loss		0	0	0
Total Net Periodic Benefit Plan Income	(3.1)	(4.1)	(9.6)	(12.3)
Intercompany Income Allocations	(0.2)	0.3	(0.3)	(0.3)
PSNH \| PBOP
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	0.1	0.2	0.4	0.6
Interest Cost	0.9	0.9	2.6	2.7
Expected Return on Plan Assets	(1.4)	(1.4)	(4.2)	(4.2)
Actuarial Loss/(Gain)	0	0	0	0
Prior Service Cost/(Credit)	0.1	0.1	0.3	0.3
Settlement Loss		0	0	0
Total Net Periodic Benefit Plan Income	(0.3)	(0.2)	(0.9)	(0.6)
Intercompany Income Allocations	$ (0.2)	$ (0.2)	$ (0.6)	$ (0.5)

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Environmental Sites and Related Reserves (Details) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) site	Dec. 31, 2023 USD ($) site
Site Contingency [Line Items]
Number of Sites \| site	65	65
Reserve \| $	$ 130.5	$ 128.2
CL&P
Site Contingency [Line Items]
Number of Sites \| site	15	16
Reserve \| $	$ 13.7	$ 13.8
NSTAR Electric
Site Contingency [Line Items]
Number of Sites \| site	13	12
Reserve \| $	$ 6.7	$ 5.4
PSNH
Site Contingency [Line Items]
Number of Sites \| site	8	8
Reserve \| $	$ 6.4	$ 7.6

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Environmental Matters Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Site Contingency [Line Items]
Reserve balance	$ 130.5	$ 128.2
MGP Sites
Site Contingency [Line Items]
Reserve balance	$ 117.9	$ 117.1

COMMITMENTS AND CONTINGENCIES_3

COMMITMENTS AND CONTINGENCIES - Schedule of Estimated Future Annual Costs of Long term Contractual Agreement (Details) - Renewable Energy Contracts - CL&P $ in Millions	Sep. 30, 2024 USD ($)
Long-Term Purchase Commitment [Line Items]
2024	$ 208.8
2025	666.4
2026	743.5
2027	745.9
2028	747.6
Thereafter	4,016.7
Total	$ 7,128.9

COMMITMENTS AND CONTINGENCIES_4

COMMITMENTS AND CONTINGENCIES - Long-Term Contractual Arrangements (Details) $ in Millions	Dec. 31, 2023 USD ($)
Renewable Energy Contracts \| PSNH
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded unconditional purchase obligation	$ 503.2

COMMITMENTS AND CONTINGENCIES_5

COMMITMENTS AND CONTINGENCIES - Guarantees and Indemnifications Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2024	Jul. 09, 2024	Feb. 13, 2024	Jan. 24, 2024	Dec. 31, 2023
Guarantor Obligations [Line Items]
Fair value of guarantees	$ 1.1				$ 4.4
Maximum exposure (up to)	$ 850
South Fork Wind And Revolution Wind
Guarantor Obligations [Line Items]
Ownership interest (percent)			50%
Sunrise Wind, LLC
Guarantor Obligations [Line Items]
Ownership interest (percent)		50%
Sunrise Wind, LLC \| Orsted
Guarantor Obligations [Line Items]
Ownership interest (percent)		50%		50%

COMMITMENTS AND CONTINGENCIES_6

COMMITMENTS AND CONTINGENCIES - Schedule of Guarantees and Indemnifications (Details) $ in Millions	Sep. 30, 2024 USD ($)
Guarantor Obligations [Line Items]
Maximum Exposure	$ 850
Eversource Investment LLC \| Letters of Credit
Guarantor Obligations [Line Items]
Maximum Exposure	5.3
Maximum borrowing capacity	$ 25
North East Offshore, Revolution Wind, LLC and South Fork Wind, LLC
Guarantor Obligations [Line Items]
Ownership interest (percent)	50%
Eversource Investment LLC, Eversource Investment Service Company LLC and South Fork Class B Member, LLC
Guarantor Obligations [Line Items]
Maximum Exposure	$ 1,620
South Fork Wind, LLC
Guarantor Obligations [Line Items]
Maximum Exposure	$ 7.1
Ownership interest (percent)	50%
South Fork Class B Member, LLC
Guarantor Obligations [Line Items]
Ownership interest (percent)	50%
Performance Guarantee \| Eversource Investment Service Company LLC
Guarantor Obligations [Line Items]
Maximum Exposure	$ 100
Tax Equity \| Eversource TEI LLC
Guarantor Obligations [Line Items]
Maximum Exposure	50
North East Offshore, LLC, Revolution Wind, LLC, and TurbineCo, LLC \| Construction-related purchase agreements with third-party contractors
Guarantor Obligations [Line Items]
Maximum Exposure	455.3
Eversource Investment LLC, Eversource Investment Service Company LLC and South Fork Class B Member, LLC \| Funding and indemnification obligations of North East Offshore LLC
Guarantor Obligations [Line Items]
Maximum Exposure	351.1
Eversource Investment LLC \| Letters Of Credit Guarantee
Guarantor Obligations [Line Items]
Maximum Exposure	5.3
Eversource TEI LLC \| South Fork Wind Tax Equity
Guarantor Obligations [Line Items]
Maximum Exposure	50
South Fork Wind, LLC \| Power Purchase Guarantee
Guarantor Obligations [Line Items]
Maximum Exposure	7.1
Various Eversource subsidiaries \| Surety Bond
Guarantor Obligations [Line Items]
Maximum Exposure	31.1
North East Offshore, Revolution Wind, LLC and South Fork Wind, LLC \| Performance Guarantee
Guarantor Obligations [Line Items]
Maximum Exposure	1,090
North East Offshore LLC \| Payment Guarantee
Guarantor Obligations [Line Items]
Maximum Exposure	$ 62.5
Percent of obligations guaranteed (in percent)	50%

COMMITMENTS AND CONTINGENCIES_7

COMMITMENTS AND CONTINGENCIES - Spent Nuclear Fuel Obligations - Yankee Companies (Details) - Yankee Companies - USD ($) $ in Millions	Jun. 08, 2022	Mar. 25, 2021
Loss Contingencies [Line Items]
Damages sought	$ 33.1
CYAPC, YAEC, and MYAPC
Loss Contingencies [Line Items]
Damages sought		$ 120.4

COMMITMENTS AND CONTINGENCIES_8

COMMITMENTS AND CONTINGENCIES - FERC ROE Complaints (Details) $ in Millions			9 Months Ended	36 Months Ended
	Apr. 29, 2016 complaint	Oct. 16, 2014	Sep. 30, 2024 USD ($) period	Oct. 15, 2014	Dec. 31, 2023 USD ($)	Dec. 23, 2019 complaint	Nov. 21, 2019 complaint	Oct. 16, 2018 complaint	Jul. 31, 2014 complaint
Loss Contingencies [Line Items]
Percentage of base ROE reasonably justified (in percent)			10.41%
Percentage of incentive cap on total ROE (in percent)			13.08%
FERC ROE Complaints
Loss Contingencies [Line Items]
Number of complaints filed \| complaint	4					4	2	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
Number of complain periods \| period			4
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

FAIR VALUE OF FINANCIAL INSTR_3

FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	$ 155,568	$ 155,569
Rate Reduction Bonds	324,072	367,282
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	27,413,900	24,413,500
Rate Reduction Bonds	367,300	410,500
Fair Value \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	131,500	122,200
Long-Term Debt	26,518,400	22,855,200
Rate Reduction Bonds	360,100	395,000
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	5,250,600	4,814,400
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	96,900	90,400
Long-Term Debt	5,099,200	4,572,000
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	5,093,700	4,496,900
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	34,600	31,800
Long-Term Debt	4,968,000	4,273,700
Rate Reduction Bonds	0	0
PSNH
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Rate Reduction Bonds	324,072	367,282
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	1,731,800	1,431,600
Rate Reduction Bonds	367,300	410,500
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	1,623,600	1,292,600
Rate Reduction Bonds	$ 360,100	$ 395,000

ACCUMULATED OTHER COMPREHENSI_3

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period	$ 14,818,713	$ 14,543,588	$ 14,173,892	$ 15,554,098	$ 15,749,371	$ 15,473,158	$ 14,173,892	$ 15,473,158
OCI Before Reclassifications							(900)	100
Amounts Reclassified from AOCI							6,400	15,300
Other Comprehensive (Loss)/Income, Net of Tax							5,500	15,400
Balance as of End of Period	15,044,424	14,818,713	14,543,588	15,685,941	15,554,098	15,749,371	15,044,424	15,685,941
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period	(29,581)	(28,534)	(33,737)	(32,103)	(36,191)	(39,421)	(33,737)	(39,421)
Balance as of End of Period	(28,205)	$ (29,581)	(28,534)	(24,022)	$ (32,103)	(36,191)	(28,205)	(24,022)
Qualified Cash Flow Hedging Instruments
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period			(400)			(400)	(400)	(400)
OCI Before Reclassifications							0	0
Amounts Reclassified from AOCI							0	0
Other Comprehensive (Loss)/Income, Net of Tax							0	0
Balance as of End of Period	(400)			(400)			(400)	(400)
Unrealized Gains/(Losses) on Marketable Securities
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period						(1,200)		(1,200)
OCI Before Reclassifications								0
Amounts Reclassified from AOCI								1,200
Other Comprehensive (Loss)/Income, Net of Tax								1,200
Balance as of End of Period				0				0
Defined Benefit Plans
AOCI Attributable to Parent [Roll Forward]
Balance as of Beginning of Period			$ (33,300)			$ (37,800)	(33,300)	(37,800)
OCI Before Reclassifications							(900)	100
Amounts Reclassified from AOCI							6,400	14,100
Other Comprehensive (Loss)/Income, Net of Tax							5,500	14,200
Balance as of End of Period	$ (27,800)			$ (23,600)			$ (27,800)	$ (23,600)

COMMON SHARES - Common Shares A

COMMON SHARES - Common Shares Authorized and Issued (Details) - $ / shares	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Par value (in dollars per share)	$ 5	$ 5	$ 5	$ 5
Authorized (in shares)	410,000,000			410,000,000
Issued (in shares)	373,276,991			359,984,073
CL&P
Class of Stock [Line Items]
Par value (in dollars per share)	$ 10			$ 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			$ 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			$ 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	9 Months Ended	12 Months Ended
COMMON SHARES - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Equity [Abstract]
Sale of stock, issuance of common stock, maximum	$ 1,200
Sale of stock, number of shares issued in transaction (in shares)	13,300,000	0
Sale of stock, consideration received on transaction	$ 830.2
Treasury stock, common (in shares)	9,385,018	10,443,807
Common stock outstanding (in shares)	363,891,973	349,540,266

COMMON SHAREHOLDERS' EQUITY A_2

COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Noncontrolling Interest [Line Items]
Dividends on preferred stock	$ 1,880	$ 1,880	$ 1,880	$ 1,880	$ 1,880	$ 1,880
Noncontrolling interest attributed to preferred stock of subsidiaries	155,568						$ 155,568		$ 155,569
CL&P and NSTAR
Noncontrolling Interest [Line Items]
Dividends on preferred stock	$ 1,900			$ 1,900			$ 5,600	$ 5,600

EARNINGS PER SHARE - Narrative

EARNINGS PER SHARE - Narrative (Details) - shares	3 Months Ended		9 Months Ended
EARNINGS PER SHARE - Narrative (Details) - shares	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
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		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Earnings Per Share [Abstract]
Net (Loss)/Income Attributable to Common Shareholders	$ (118,057)	$ 339,663	$ 739,133	$ 846,245
Net (Loss)/Income Attributable to Common Shareholders	$ (118,100)	$ 339,700	$ 739,100	$ 846,200
Weighted Average Common Shares Outstanding:
Basic (in shares)	359,520,518	349,704,155	354,483,338	349,461,219
Dilutive effect (in shares)	297,139	147,814	261,508	270,101
Diluted (in shares)	359,817,657	349,851,969	354,744,846	349,731,320
Basic EPS (in dollars per share)	$ (0.33)	$ 0.97	$ 2.09	$ 2.42
Diluted EPS (in dollars per share)	$ (0.33)	$ 0.97	$ 2.08	$ 2.42

REVENUES (Details)

REVENUES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
REVENUES (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 3,067,400	$ 2,833,500	$ 8,859,500	$ 9,211,000
Alternative Revenue Programs	(10,100)	(48,200)	52,500	(14,000)
Other Revenues	5,900	6,200	17,300	19,500
Total Operating Revenues	3,063,224	2,791,482	8,929,321	9,216,467
CL&P
Disaggregation of Revenue [Line Items]
Total Operating Revenues	1,345,253	1,190,096	3,431,167	3,563,150
NSTAR Electric
Disaggregation of Revenue [Line Items]
Total Operating Revenues	1,077,523	953,531	2,870,206	2,728,782
PSNH
Disaggregation of Revenue [Line Items]
Total Operating Revenues	342,027	353,074	955,453	1,123,300
Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	2,679,800	2,441,000	7,790,600	8,129,800
Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,595,900	1,503,600	4,657,200	4,952,700
Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	945,000	816,300	2,730,400	2,778,100
Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	138,900	121,100	403,000	399,000
Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	152,500	133,600	381,800	342,600
Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	204,000	227,600	596,400	647,800
Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	31,100	31,300	90,700	90,800
Operating Segments \| CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,563,600	1,396,200	3,926,400	3,972,200
Alternative Revenue Programs	(46,500)	(49,300)	4,900	28,000
Other Revenues	2,400	2,400	6,700	7,100
Operating Segments \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,236,800	1,129,200	3,339,900	3,194,500
Alternative Revenue Programs	8,100	(29,000)	20,100	(43,500)
Other Revenues	2,000	1,900	5,600	6,300
Operating Segments \| PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	418,500	411,000	1,140,500	1,247,700
Alternative Revenue Programs	(9,700)	900	1,300	32,400
Other Revenues	500	700	2,000	2,300
Operating Segments \| Total Retail Tariff Sales Revenues \| CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,158,200	1,029,300	2,864,900	3,000,700
Operating Segments \| Total Retail Tariff Sales Revenues \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	980,600	901,800	2,611,100	2,535,400
Operating Segments \| Total Retail Tariff Sales Revenues \| PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	296,300	303,800	809,700	959,700
Operating Segments \| Residential \| CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	757,100	703,900	1,897,700	2,059,900
Operating Segments \| Residential \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	530,800	480,500	1,373,200	1,318,700
Operating Segments \| Residential \| PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	177,600	191,500	476,200	603,500
Operating Segments \| Commercial \| CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	349,900	286,400	850,200	836,700
Operating Segments \| Commercial \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	416,900	389,400	1,144,800	1,121,000
Operating Segments \| Commercial \| PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	91,400	88,700	254,600	287,500
Operating Segments \| Industrial \| CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	51,200	39,000	117,000	104,100
Operating Segments \| Industrial \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	32,900	31,900	93,100	95,700
Operating Segments \| Industrial \| PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	27,300	23,600	78,900	68,700
Operating Segments \| Wholesale Transmission Revenues \| CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	262,200	245,100	681,700	613,300
Operating Segments \| Wholesale Transmission Revenues \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	212,300	186,400	602,000	521,000
Operating Segments \| Wholesale Transmission Revenues \| PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	109,100	88,700	286,900	223,900
Operating Segments \| Wholesale Market Sales Revenues \| CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	134,100	112,800	352,800	330,400
Operating Segments \| Wholesale Market Sales Revenues \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	31,800	28,600	90,300	102,100
Operating Segments \| Wholesale Market Sales Revenues \| PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	7,900	13,500	28,000	51,900
Operating Segments \| Other Revenues from Contracts with Customers \| CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	9,100	9,000	27,000	27,800
Operating Segments \| Other Revenues from Contracts with Customers \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	12,100	12,400	36,500	36,000
Operating Segments \| Other Revenues from Contracts with Customers \| PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	5,200	5,000	15,900	12,200
Other
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	414,700	394,700	1,253,600	1,217,300
Alternative Revenue Programs	0	0	0	0
Other Revenues	0	0	0	0
Total Operating Revenues	414,700	394,700	1,253,600	1,217,300
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	0	0	0	0
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	414,700	394,700	1,253,600	1,217,300
Eliminations
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(851,600)	(784,900)	(2,458,700)	(2,244,300)
Alternative Revenue Programs	41,000	31,900	(1,700)	(50,800)
Other Revenues	0	0	0	0
Total Operating Revenues	(810,600)	(753,000)	(2,460,400)	(2,295,100)
Eliminations \| Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(7,900)	(5,900)	(22,200)	(18,000)
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	(2,500)	(1,100)	(5,700)	(3,400)
Eliminations \| Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(5,400)	(4,800)	(16,500)	(14,600)
Eliminations \| Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(431,100)	(386,600)	(1,188,800)	(1,015,600)
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	(412,600)	(392,400)	(1,247,700)	(1,210,700)
Consolidations Eliminations \| CL&P
Disaggregation of Revenue [Line Items]
Total Operating Revenues	(174,200)	(159,200)	(506,800)	(444,100)
Consolidations Eliminations \| NSTAR Electric
Disaggregation of Revenue [Line Items]
Total Operating Revenues	(169,400)	(148,600)	(495,400)	(428,500)
Consolidations Eliminations \| PSNH
Disaggregation of Revenue [Line Items]
Total Operating Revenues	(67,300)	(59,500)	(188,300)	(159,100)
Electric Distribution \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	2,630,900	2,410,300	6,822,500	7,039,800
Alternative Revenue Programs	(2,900)	(43,800)	24,400	(40,700)
Other Revenues	4,800	4,800	13,900	15,200
Total Operating Revenues	2,632,800	2,371,300	6,860,800	7,014,300
Electric Distribution \| Operating Segments \| Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	2,434,700	2,234,500	6,284,600	6,495,300
Electric Distribution \| Operating Segments \| Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,465,500	1,375,900	3,747,100	3,982,100
Electric Distribution \| Operating Segments \| Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	857,800	764,100	2,248,500	2,244,700
Electric Distribution \| Operating Segments \| Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	111,400	94,500	289,000	268,500
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	173,800	154,900	471,100	484,400
Electric Distribution \| Operating Segments \| Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	22,400	20,900	66,800	60,100
Natural Gas Distribution \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	220,200	219,800	1,486,500	1,647,700
Alternative Revenue Programs	(3,600)	(2,400)	28,100	21,900
Other Revenues	600	900	2,100	3,000
Total Operating Revenues	217,200	218,300	1,516,700	1,672,600
Natural Gas Distribution \| Operating Segments \| Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	189,300	146,900	1,359,800	1,483,300
Natural Gas Distribution \| Operating Segments \| Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	86,700	83,000	798,300	858,000
Natural Gas Distribution \| Operating Segments \| Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	71,000	33,700	434,500	483,600
Natural Gas Distribution \| Operating Segments \| Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	31,600	30,200	127,000	141,700
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	29,000	71,600	122,200	160,500
Natural Gas Distribution \| Operating Segments \| Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,900	1,300	4,500	3,900
Electric Transmission \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	587,100	525,000	1,581,600	1,372,300
Alternative Revenue Programs	(45,200)	(33,600)	1,900	57,600
Other Revenues	100	200	400	500
Total Operating Revenues	542,000	491,600	1,583,900	1,430,400
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	583,600	520,200	1,570,600	1,358,200
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	3,500	4,800	11,000	14,100
Water Distribution \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	66,100	68,600	174,000	178,200
Alternative Revenue Programs	600	(300)	(200)	(2,000)
Other Revenues	400	300	900	800
Total Operating Revenues	67,100	68,600	174,700	177,000
Water Distribution \| Operating Segments \| Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	63,700	65,500	168,400	169,200
Water Distribution \| Operating Segments \| Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	43,700	44,700	111,800	112,600
Water Distribution \| Operating Segments \| Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	18,700	19,600	53,100	53,200
Water Distribution \| Operating Segments \| Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,300	1,200	3,500	3,400
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	1,200	1,100	3,100	2,900
Water Distribution \| Operating Segments \| Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 1,200	$ 2,000	$ 2,500	$ 6,100

SEGMENT INFORMATION - Narrative

SEGMENT INFORMATION - Narrative (Details) $ in Millions	9 Months Ended
SEGMENT INFORMATION - Narrative (Details) $ in Millions	Sep. 30, 2024 USD ($) reportableSegment
CL&P
Segment Reporting Information [Line Items]
Number of reportable segment	1
NSTAR Electric
Segment Reporting Information [Line Items]
Number of reportable segment	1
PSNH
Segment Reporting Information [Line Items]
Number of reportable segment	1
Related Party
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			9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating Revenues	$ 3,063,224	$ 2,791,482		$ 8,929,321	$ 9,216,467
Depreciation and Amortization	(610,100)	(185,500)		(1,188,100)	(524,000)
Other Operating Expenses	(1,840,700)	(2,075,400)		(5,680,300)	(6,851,700)
Operating Income/(Loss)	612,400	530,553		2,060,870	1,840,787
Interest Expense	(300,600)	(222,300)		(822,600)	(624,100)
Loss on Offshore Wind Investments	(464,019)	0	$ (401,000)	(464,019)	(401,000)	$ (1,770,000)
Other Income, Net	112,555	79,123		318,870	262,980
Net Income/(Loss) Attributable to Common Shareholders	(118,057)	339,663		739,133	846,245
Cash Flows Used for Investments in Plant				3,291,900	3,125,600
Assets	58,573,319			58,573,319		55,612,245
Other
Segment Reporting Information [Line Items]
Operating Revenues	414,700	394,700		1,253,600	1,217,300
Depreciation and Amortization	(52,100)	(40,700)		(146,300)	(115,500)
Other Operating Expenses	(326,600)	(315,700)		(990,300)	(992,600)
Operating Income/(Loss)	36,000	38,300		117,000	109,200
Interest Expense	(177,700)	(111,400)		(484,800)	(297,000)
Loss on Offshore Wind Investments	(464,000)			(464,000)	(401,000)
Other Income, Net	48,800	415,900		1,145,000	1,082,600
Net Income/(Loss) Attributable to Common Shareholders	(516,500)	397,000		375,900	621,600
Cash Flows Used for Investments in Plant				180,100	207,100
Assets	27,371,000			27,371,000		26,337,700
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(810,600)	(753,000)		(2,460,400)	(2,295,100)
Depreciation and Amortization	2,800	2,300		8,100	6,600
Other Operating Expenses	807,800	751,200		2,452,300	2,290,000
Operating Income/(Loss)	0	500		0	1,500
Interest Expense	57,900	38,400		171,200	104,800
Loss on Offshore Wind Investments	0			0	0
Other Income, Net	(31,400)	(412,700)		(1,094,400)	(1,038,000)
Net Income/(Loss) Attributable to Common Shareholders	26,500	(373,800)		(923,200)	(931,700)
Cash Flows Used for Investments in Plant				0	0
Assets	(28,533,900)			(28,533,900)		(26,678,500)
Electric Distribution \| Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues	2,632,800	2,371,300		6,860,800	7,014,300
Depreciation and Amortization	(420,800)	(700)		(565,500)	59,300
Other Operating Expenses	(1,910,700)	(2,124,000)		(5,529,300)	(6,371,400)
Operating Income/(Loss)	301,300	246,600		766,000	702,200
Interest Expense	(98,800)	(76,800)		(272,200)	(214,400)
Loss on Offshore Wind Investments	0			0	0
Other Income, Net	65,800	53,500		189,200	155,700
Net Income/(Loss) Attributable to Common Shareholders	203,500	173,300		521,300	504,300
Cash Flows Used for Investments in Plant				1,309,100	1,230,300
Assets	31,411,300			31,411,300		29,426,400
Natural Gas Distribution \| Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues	217,200	218,300		1,516,700	1,672,600
Depreciation and Amortization	(28,200)	(38,000)		(161,400)	(156,700)
Other Operating Expenses	(216,400)	(211,100)		(1,066,200)	(1,280,800)
Operating Income/(Loss)	(27,400)	(30,800)		289,100	235,100
Interest Expense	(25,200)	(19,700)		(72,000)	(62,400)
Loss on Offshore Wind Investments	0			0	0
Other Income, Net	11,400	9,200		32,500	27,900
Net Income/(Loss) Attributable to Common Shareholders	(30,200)	(33,700)		187,400	148,200
Cash Flows Used for Investments in Plant				697,800	536,800
Assets	9,518,200			9,518,200		8,775,300
Electric Transmission \| Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues	542,000	491,600		1,583,900	1,430,400
Depreciation and Amortization	(102,000)	(94,500)		(301,800)	(276,400)
Other Operating Expenses	(163,600)	(144,900)		(452,600)	(409,400)
Operating Income/(Loss)	276,400	252,200		829,500	744,600
Interest Expense	(48,500)	(43,000)		(135,400)	(126,700)
Loss on Offshore Wind Investments	0			0	0
Other Income, Net	11,800	11,900		38,100	30,800
Net Income/(Loss) Attributable to Common Shareholders	174,900	160,300		540,600	476,400
Cash Flows Used for Investments in Plant				985,600	1,011,300
Assets	15,750,500			15,750,500		14,806,500
Water Distribution \| Operating Segments
Segment Reporting Information [Line Items]
Operating Revenues	67,100	68,600		174,700	177,000
Depreciation and Amortization	(9,800)	(13,900)		(21,200)	(41,300)
Other Operating Expenses	(31,200)	(30,900)		(94,200)	(87,500)
Operating Income/(Loss)	26,100	23,800		59,300	48,200
Interest Expense	(8,300)	(9,800)		(29,400)	(28,400)
Loss on Offshore Wind Investments	0			0	0
Other Income, Net	6,200	1,300		8,500	4,000
Net Income/(Loss) Attributable to Common Shareholders	23,700	$ 16,600		37,100	27,400
Cash Flows Used for Investments in Plant				119,300	$ 140,100
Assets	$ 3,056,200			$ 3,056,200		$ 2,944,800