10-K

	UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549
	FORM	10-K
☒	ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
	For the fiscal year ended	December 31, 2022
	or
☐	TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE      SECURITIES EXCHANGE ACT OF 1934
	For the transition period from ____________ to ____________

Registrant; State of Incorporation; Address; Telephone Number;

Commission File Number; and I.R.S. Employer Identification No.

EVERSOURCE ENERGY

(a Massachusetts voluntary association)

300 Cadwell Drive, Springfield, Massachusetts 01104

Telephone: (800) 286-5000

Commission File Number: 001-05324

I.R.S. Employer Identification No. 04-2147929

THE CONNECTICUT LIGHT AND POWER COMPANY

(a Connecticut corporation)

107 Selden Street, Berlin, Connecticut 06037-1616

Telephone: (800) 286-5000

Commission File Number: 000-00404

I.R.S. Employer Identification No. 06-0303850

NSTAR ELECTRIC COMPANY

(a Massachusetts corporation)

800 Boylston Street, Boston, Massachusetts 02199

Telephone: (800) 286-5000

Commission File Number: 001-02301

I.R.S. Employer Identification No. 04-1278810

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE

(a New Hampshire corporation)

Energy Park

780 North Commercial Street, Manchester, New Hampshire 03101-1134

Telephone: (800) 286-5000

Commission File Number: 001-06392

I.R.S. Employer Identification No. 02-0181050

Securities registered pursuant to Section 12(b) of the Act:
Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Shares, $5.00 par value per share	ES	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act:

Registrant	Title of Class
The Connecticut Light and Power Company	Preferred Stock, par value $50.00 per share, issuable in series, of which the following series are outstanding:
		$1.90 $2.00 $2.04 $2.20 3.90% $2.06 $2.09 4.50% 4.96% 4.50% 5.28% $3.24 6.56%	Series  Series Series Series Series Series E Series F Series Series Series Series Series G Series	of 1947 of 1947 of 1949 of 1949 of 1949 of 1954 of 1955 of 1956 of 1958 of 1963 of 1967 of 1968 of 1968
NSTAR Electric Company	Preferred Stock, par value $100.00 per share, issuable in series, of which the following series are outstanding:
		4.25% 4.78%	Series Series	of 1956 of 1958

Indicate by check mark if the registrants are well-known seasoned issuers, as defined in Rule 405 of the Securities Act.

Yes	No
☒	☐

Indicate by check mark if the registrants are not required to file reports pursuant to Section 13 or Section 15(d) of the Act.

Yes	No
☐	☒

Indicate by check mark whether the registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days.

Yes	No
☒	☐

Indicate by check mark whether the registrants have submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrants were required to submit such files).

Yes	No
☒	☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Eversource Energy	Large accelerated filer	☒	Accelerated filer	☐	Non-accelerated filer	☐	Smaller reporting company	☐	Emerging growth company	☐
The Connecticut Light and Power Company	Large accelerated filer	☐	Accelerated filer	☐	Non-accelerated filer	☒	Smaller reporting company	☐	Emerging growth company	☐
NSTAR Electric Company	Large accelerated filer	☐	Accelerated filer	☐	Non-accelerated filer	☒	Smaller reporting company	☐	Emerging growth company	☐
Public Service Company of New Hampshire	Large accelerated filer	☐	Accelerated filer	☐	Non-accelerated filer	☒	Smaller reporting company	☐	Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrants are shell companies (as defined in Rule 12b-2 of the Exchange Act):

	Yes	No
Eversource Energy	☐	☒
The Connecticut Light and Power Company	☐	☒
NSTAR Electric Company	☐	☒
Public Service Company of New Hampshire	☐	☒

The aggregate market value of Eversource Energy's Common Shares, $5.00 par value, held by non-affiliates, computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of Eversource Energy's most recently completed second fiscal quarter (June 30, 2022) was $29,211,450,455 based on a closing market price of $84.47 per share for the 345,820,415 common shares outstanding held by non-affiliates on June 30, 2022. 

Indicate the number of shares outstanding of each of the registrant's classes of common stock, as of the latest practicable date:

Company - Class of Stock	Outstanding as of January 31, 2023
Eversource Energy Common Shares, $5.00 par value	348,483,425	shares
The Connecticut Light and Power Company Common Stock, $10.00 par value	6,035,205	shares
NSTAR Electric Company Common Stock, $1.00 par value	200	shares
Public Service Company of New Hampshire Common Stock, $1.00 par value	301	shares

Eversource Energy holds all of the 6,035,205 shares, 200 shares, and 301 shares of the outstanding common stock of The Connecticut Light and Power Company, NSTAR Electric Company and Public Service Company of New Hampshire, respectively.

NSTAR Electric Company and Public Service Company of New Hampshire each meet the conditions set forth in General Instruction I(1)(a) and (b) of Form 10-K, and each is therefore filing this Form 10-K with the reduced disclosure format specified in General Instruction I(2) of Form 10‑K.  

Eversource Energy, The Connecticut Light and Power Company, NSTAR Electric Company and Public Service Company of New Hampshire each separately file this combined Form 10-K.  Information contained herein relating to any individual registrant is filed by such registrant on its own behalf.  Each registrant makes no representation as to information relating to the other registrants.

Documents Incorporated by Reference

Portions of the Eversource Energy and Subsidiaries 2021 combined Annual Report on Form 10-K and portions of the Proxy Statement relating to the Annual Meeting of Shareholders to be held on May 3, 2023, are incorporated by reference into Parts II and III of this Report.

GLOSSARY OF TERMS

The following is a glossary of abbreviations and acronyms that are found in this report:

Current or former Eversource Energy companies, segments or investments:
Eversource, ES or the Company	Eversource Energy and subsidiaries
Eversource parent or ES parent	Eversource Energy, a public utility holding company
ES parent and other companies	ES parent and other companies are comprised of Eversource parent, Eversource Service, and other subsidiaries, which primarily includes our unregulated businesses, HWP Company, The Rocky River Realty Company (a real estate subsidiary), the consolidated operations of CYAPC and YAEC, and Eversource parent's equity ownership interests that are not consolidated
CL&P	The Connecticut Light and Power Company
NSTAR Electric	NSTAR Electric Company
PSNH	Public Service Company of New Hampshire
PSNH Funding	PSNH Funding LLC 3, a bankruptcy remote, special purpose, wholly-owned subsidiary of PSNH
NSTAR Gas	NSTAR Gas Company
EGMA	Eversource Gas Company of Massachusetts
Yankee Gas	Yankee Gas Services Company
Aquarion	Aquarion Company and its subsidiaries
HEEC	Harbor Electric Energy Company, a wholly-owned subsidiary of NSTAR Electric
Eversource Service	Eversource Energy Service Company
North East Offshore	North East Offshore, LLC, an offshore wind business being developed jointly by Eversource and Denmark-based Ørsted
CYAPC	Connecticut Yankee Atomic Power Company
MYAPC	Maine Yankee Atomic Power Company
YAEC	Yankee Atomic Electric Company
Yankee Companies	CYAPC, YAEC and MYAPC
Regulated companies	The Eversource regulated companies are comprised of the electric distribution and transmission businesses of CL&P, NSTAR Electric and PSNH, the natural gas distribution businesses of Yankee Gas, NSTAR Gas and EGMA, Aquarion’s water distribution businesses, and the solar power facilities of NSTAR Electric
Regulators and Government Agencies:
BOEM	U.S. Bureau of Ocean Energy Management
DEEP	Connecticut Department of Energy and Environmental Protection
DOE	U.S. Department of Energy
DOER	Massachusetts Department of Energy Resources
DPU	Massachusetts Department of Public Utilities
EPA	U.S. Environmental Protection Agency
FERC	Federal Energy Regulatory Commission
ISO-NE	ISO New England, Inc., the New England Independent System Operator
MA DEP	Massachusetts Department of Environmental Protection
NHPUC	New Hampshire Public Utilities Commission
PURA	Connecticut Public Utilities Regulatory Authority
SEC	U.S. Securities and Exchange Commission
Other Terms and Abbreviations:
ADIT	Accumulated Deferred Income Taxes
AFUDC	Allowance For Funds Used During Construction
AOCI	Accumulated Other Comprehensive Income
ARO	Asset Retirement Obligation
Bcf	Billion cubic feet
CfD	Contract for Differences
CWIP	Construction Work in Progress
EDC	Electric distribution company
EDIT	Excess Deferred Income Taxes
EPS	Earnings Per Share
ERISA	Employee Retirement Income Security Act of 1974
ESOP	Employee Stock Ownership Plan
Eversource 2021 Form 10-K	The Eversource Energy and Subsidiaries 2021 combined Annual Report on Form 10-K as filed with the SEC
Fitch	Fitch Ratings, Inc.

i

FMCC	Federally Mandated Congestion Charge
GAAP	Accounting principles generally accepted in the United States of America
GWh	Gigawatt-Hours
IPP	Independent Power Producers
ISO-NE Tariff	ISO-NE FERC Transmission, Markets and Services Tariff
kV	Kilovolt
kVa	Kilovolt-ampere
kW	Kilowatt (equal to one thousand watts)
LNG	Liquefied natural gas
LPG	Liquefied petroleum gas
LRS	Supplier of last resort service
MG	Million gallons
MGP	Manufactured Gas Plant
MMBtu	One million British thermal units
MMcf	Million cubic feet
Moody's	Moody's Investors Services, Inc.
MW	Megawatt
MWh	Megawatt-Hours
NETOs	New England Transmission Owners (including Eversource, National Grid and Avangrid)
OCI	Other Comprehensive Income/(Loss)
PAM	Pension and PBOP Rate Adjustment Mechanism
PBOP	Postretirement Benefits Other Than Pension
PBOP Plan	Postretirement Benefits Other Than Pension Plan
Pension Plan	Single uniform noncontributory defined benefit retirement plan
PPA	Power purchase agreement
RECs	Renewable Energy Certificates
Regulatory ROE	The average cost of capital method for calculating the return on equity related to the distribution business segment excluding the wholesale transmission segment
ROE	Return on Equity
RRBs	Rate Reduction Bonds or Rate Reduction Certificates
RSUs	Restricted share units
S&P	Standard & Poor's Financial Services LLC
SERP	Supplemental Executive Retirement Plans and non-qualified defined benefit retirement plans
SS	Standard service
UI	The United Illuminating Company
VIE	Variable Interest Entity

ii

EVERSOURCE ENERGY AND SUBSIDIARIES

THE CONNECTICUT LIGHT AND POWER COMPANY

NSTAR ELECTRIC COMPANY AND SUBSIDIARY

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

2022 FORM 10-K ANNUAL REPORT

TABLE OF CONTENTS

		Page
PART I
Item 1.	Business	2
Item 1A.	Risk Factors	16
Item 1B.	Unresolved Staff Comments	21
Item 2.	Properties	21
Item 3.	Legal Proceedings	24
Item 4.	Mine Safety Disclosures	24
	Information About Our Executive Officers	24
PART II
Item 5.	Market for the Registrants’ Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	25
Item 6.	Removed and Reserved	26
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	27
Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	55
Item 8.	Financial Statements and Supplementary Data	56
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	138
Item 9A.	Controls and Procedures	138
Item 9B.	Other Information	138
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	139
Item 11.	Executive Compensation	141
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	173
Item 13.	Certain Relationships and Related Transactions, and Director Independence	174
Item 14.	Principal Accountant Fees and Services	175
PART IV
Item 15.	Exhibits and Financial Statement Schedules	177
Item 16.	Form 10-K Summary	177
Signatures		E-9

iii

EVERSOURCE ENERGY AND SUBSIDIARIES

THE CONNECTICUT LIGHT AND POWER COMPANY

NSTAR ELECTRIC COMPANY AND SUBSIDIARY

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

SAFE HARBOR STATEMENT UNDER THE PRIVATE SECURITIES

LITIGATION REFORM ACT OF 1995

References in this Annual Report on Form 10-K to "Eversource," the "Company," "we," "our," and "us" refer to Eversource Energy and its consolidated subsidiaries. CL&P, NSTAR Electric, and PSNH are each doing business as Eversource Energy.  

We make statements concerning our expectations, beliefs, plans, objectives, goals, strategies, assumptions of future events, future financial performance or growth and other statements that are not historical facts. These statements are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. You can generally identify our forward-looking statements through the use of words or phrases such as "estimate," "expect," "anticipate," "intend," "plan," "project," "believe," "forecast," "should," "could," and other similar expressions. Forward-looking statements involve risks and uncertainties that may cause actual results or outcomes to differ materially from those included in our forward-looking statements. Forward-looking statements are based on the current expectations, estimates, assumptions or projections of management and are not guarantees of future performance. These expectations, estimates, assumptions or projections may vary materially from actual results. Accordingly, any such statements are qualified in their entirety by reference to, and are accompanied by, the following important factors that may cause our actual results or outcomes to differ materially from those contained in our forward-looking statements, including, but not limited to:

•cyberattacks or breaches, including those resulting in the compromise of the confidentiality of our proprietary information and the personal information of our customers,

•    disruptions in the capital markets or other events that make our access to necessary capital more difficult or costly,

•    changes in economic conditions, including impact on interest rates, tax policies, and customer demand and payment ability,

•    ability or inability to commence and complete our major strategic development projects and opportunities,

•    acts of war or terrorism, physical attacks or grid disturbances that may damage and disrupt our electric transmission and electric,

natural gas, and water distribution systems,

•    actions or inaction of local, state and federal regulatory, public policy and taxing bodies,

•    substandard performance of third-party suppliers and service providers,

•    fluctuations in weather patterns, including extreme weather due to climate change,

•    changes in business conditions, which could include disruptive technology or development of alternative energy sources related to our

current or future business model,

•    contamination of, or disruption in, our water supplies,

•    changes in levels or timing of capital expenditures,

•    changes in laws, regulations or regulatory policy, including compliance with environmental laws and regulations,

•    changes in accounting standards and financial reporting regulations,

•    actions of rating agencies, and

•    other presently unknown or unforeseen factors.

Other risk factors are detailed in our reports filed with the SEC and updated as necessary, and we encourage you to consult such disclosures.

All such factors are difficult to predict and contain uncertainties that may materially affect our actual results, many of which are beyond our control.  You should not place undue reliance on the forward-looking statements, as each speaks only as of the date on which such statement is made, and, except as required by federal securities laws, we undertake no obligation to update any forward-looking statement or statements to reflect events or circumstances after the date on which such statement is made or to reflect the occurrence of unanticipated events. New factors emerge from time to time and it is not possible for us to predict all of such factors, nor can we assess the impact of each such factor on the business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. For more information, see Item 1A, Risk Factors, included in this combined Annual Report on Form 10-K. This Annual Report on Form 10-K also describes material contingencies and critical accounting policies in the accompanying Management's Discussion and Analysis of Financial Condition and Results of Operations and Combined Notes to Financial Statements.  We encourage you to review these items.  

1

EVERSOURCE ENERGY AND SUBSIDIARIES

THE CONNECTICUT LIGHT AND POWER COMPANY

NSTAR ELECTRIC COMPANY AND SUBSIDIARY

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

PART I

Item 1.    Business

Please refer to the Glossary of Terms for definitions of defined terms and abbreviations used in this combined Annual Report on Form 10-K.

Eversource Energy, headquartered in Boston, Massachusetts and Hartford, Connecticut, is a public utility holding company subject to regulation by the Federal Energy Regulatory Commission (FERC) under the Public Utility Holding Company Act of 2005. We are engaged primarily in the energy delivery business through the following wholly-owned utility subsidiaries:

•The Connecticut Light and Power Company (CL&P), a regulated electric utility that serves residential, commercial and industrial customers in parts of Connecticut;

•NSTAR Electric Company (NSTAR Electric), a regulated electric utility that serves residential, commercial and industrial customers in parts of eastern and western Massachusetts and owns solar power facilities, and its wholly-owned subsidiary Harbor Electric Energy Company (HEEC), also a regulated electric utility that distributes electric energy to its sole customer;

•Public Service Company of New Hampshire (PSNH), a regulated electric utility that serves residential, commercial and industrial customers in parts of New Hampshire;

•NSTAR Gas Company (NSTAR Gas), a regulated natural gas utility that serves residential, commercial and industrial customers in parts of Massachusetts;

•Eversource Gas Company of Massachusetts (EGMA), a regulated natural gas utility that serves residential, commercial and industrial customers in parts of Massachusetts;

•Yankee Gas Services Company (Yankee Gas), a regulated natural gas utility that serves residential, commercial and industrial customers in parts of Connecticut; and

•Aquarion Company (Aquarion), a utility holding company that owns five separate regulated water utility subsidiaries and collectively serves residential, commercial, industrial, and municipal and fire protection customers in parts of Connecticut, Massachusetts and New Hampshire.

CL&P, NSTAR Electric and PSNH also serve New England customers through Eversource Energy's electric transmission business. Along with NSTAR Gas, EGMA and Yankee Gas, each is doing business as Eversource Energy in its respective service territory.

Eversource Energy, CL&P, NSTAR Electric and PSNH each report their financial results separately. We also include information in this report on a segment basis for Eversource Energy. Eversource Energy has four reportable segments: electric distribution, electric transmission, natural gas distribution and water distribution. These segments represent substantially all of Eversource Energy's total consolidated revenues. CL&P, NSTAR Electric and PSNH do not report separate business segments.

Eversource Energy also has an offshore wind business, which includes a 50 percent ownership interest in offshore wind projects that are being developed and constructed through a joint and equal partnership with Ørsted.

ELECTRIC DISTRIBUTION SEGMENT

Eversource Energy's electric distribution segment consists of the distribution businesses of CL&P, NSTAR Electric and PSNH, which are engaged in the distribution of electricity to retail customers in Connecticut, Massachusetts and New Hampshire, respectively, and the solar power facilities of NSTAR Electric.

2

ELECTRIC DISTRIBUTION – CONNECTICUT – THE CONNECTICUT LIGHT AND POWER COMPANY

CL&P's distribution business consists primarily of the purchase, delivery and sale of electricity to its residential, commercial and industrial customers. As of December 31, 2022, CL&P furnished retail franchise electric service to approximately 1.28 million customers in 149 cities and towns in Connecticut, covering an area of approximately 4,400 square miles. CL&P does not own any electric generation facilities.

Rates

CL&P is subject to regulation by the Connecticut Public Utilities Regulatory Authority (PURA), which, among other things, has jurisdiction over rates, certain dispositions of property and plant, mergers and consolidations, issuances of long-term securities, standards of service and construction and operation of facilities.  CL&P's present general rate structure consists of various rate and service classifications covering residential, commercial and industrial services.  CL&P's retail rates include a delivery service component, which includes distribution, transmission, conservation, renewable energy programs and other charges that are assessed on all customers.

Under Connecticut law, all of CL&P's customers are entitled to choose their energy suppliers, while CL&P remains their electric distribution company.  For those customers who do not choose a competitive energy supplier, CL&P purchases power on behalf of, and passes the related cost without mark-up through to, those customers under standard service (SS) rates for customers with less than 500 kilowatts of demand (residential customers and small and medium commercial and industrial customers), and supplier of last resort service (LRS) rates for customers with 500 kilowatts or more of demand (larger commercial and industrial customers). CL&P charges customers only the amount that it pays generators for producing electricity and does not earn a profit on the cost of electricity.

The rates established by PURA for CL&P are comprised of the following:

•An electric generation service charge, which recovers energy-related costs incurred as a result of providing electric generation service supply to all customers who have not migrated to competitive energy suppliers.  The generation service charge is adjusted periodically and reconciled annually in accordance with the policies and procedures of the PURA, with any differences refunded to, or recovered from, customers.

•A distribution charge, which includes a fixed customer charge and a demand and/or energy charge to collect the costs of building and expanding the infrastructure to deliver electricity to customers, as well as ongoing operating costs to maintain the infrastructure.  

•A revenue decoupling adjustment that reconciles annual base distribution rate recovery amounts recovered from customers to the pre-established level of baseline distribution delivery service revenue requirement approved by PURA.

•An Electric System Improvements (ESI) charge, which collects the costs of building and expanding the infrastructure to deliver electricity to customers above the level recovered through the distribution charge. The ESI also recovers costs associated with CL&P’s system resiliency program. The ESI is adjusted periodically and reconciled annually in accordance with the policies and procedures of the PURA, with any differences refunded to, or recovered from, customers.

•A Federally Mandated Congestion Charge (FMCC), which recovers any costs imposed by the FERC as part of the New England Standard Market Design, including locational marginal pricing, locational installed capacity payments, any costs approved by PURA to reduce these charges, as well as other costs approved by PURA.  The FMCC has both a bypassable component and a non-bypassable component, and is adjusted periodically and reconciled annually in accordance with the policies and procedures of the PURA, with any differences refunded to, or recovered from, customers.

•A transmission charge that recovers the cost of transporting electricity over high-voltage lines from generating plants to substations, including costs allocated by ISO-NE to maintain the wholesale electric market. The transmission charge is adjusted periodically and reconciled annually to actual costs incurred, and reviewed by PURA, with any difference refunded to, or recovered from, customers.

•A Competitive Transition Assessment (CTA) charge, assessed to recover stranded costs associated with electric industry restructuring such as various IPP contracts.  The CTA is reconciled annually to actual costs incurred and reviewed by PURA, with any difference refunded to, or recovered from, customers.

•A Systems Benefits Charge (SBC), established to fund expenses associated with various hardship and low-income programs. The SBC is reconciled annually to actual costs incurred, and reviewed by PURA, with any difference refunded to, or recovered from, customers.  

•A Renewable Energy Investment Charge, which is used to promote investment in renewable energy sources.  Amounts collected by this charge are deposited into the Connecticut Clean Energy Fund and administered by the Connecticut Green Bank.  

•A Conservation Adjustment Mechanism (CAM) charge established to implement cost-effective energy conservation programs and market transformation initiatives. The CAM charge is reconciled annually to actual costs incurred, and reviewed by PURA, with any difference refunded to, or recovered from, customers through an approved adjustment to the following year’s energy conservation spending plan budget.

3

As required by regulation, CL&P has entered into long-term contracts for the purchase of (i) products from renewable energy facilities, which may include energy, renewable energy certificates, or capacity, (ii) capacity-related contracts with generation facilities, and (iii) contracts for peaking capacity.  Some of these contracts are subject to sharing agreements with UI, whereby CL&P is responsible for 80 percent and UI for 20 percent of the net costs or benefits.  CL&P's portion of the costs and benefits of these contracts will be paid by, or refunded to, CL&P's customers.

Distribution Rate Case: CL&P's distribution rates were established in an April 2018 PURA-approved rate case settlement agreement with rates effective May 1, 2018, and incremental step adjustments effective May 1, 2019 and May 1, 2020.

CL&P Settlement Agreement: On October 1, 2021, CL&P entered into a settlement agreement with the DEEP, Office of Consumer Counsel, Office of the Attorney General and the Connecticut Industrial Energy Consumers, resolving certain issues that arose in then-pending regulatory proceedings initiated by PURA. PURA approved the settlement agreement on October 27, 2021. In accordance with the settlement agreement, CL&P agreed that its current base distribution rates shall be frozen, subject to certain customer credits, until no earlier than January 1, 2024. The rate freeze applies only to base distribution rates (including storm costs) and not to other rate mechanisms such as the retail rate components, rate reconciling mechanisms, formula rates and any other adjustment mechanisms. The rate freeze also does not apply to any cost recovery mechanism outside of the base distribution rates with regard to grid-modernization initiatives or any other proceedings, either currently pending or that may be initiated during the rate freeze period, that may place additional obligations on CL&P. The approval of the settlement agreement satisfies the Connecticut statute of rate review requirements that requires electric utilities to file a distribution rate case within four years of the last rate case.

Sources and Availability of Electric Power Supply

As noted above, CL&P does not own any generation assets and purchases energy supply to serve its SS and LRS loads from a variety of competitive sources through requests for proposals. During 2022, CL&P supplied approximately 56 percent of its customer load at SS or LRS rates while the other 44 percent of its customer load had migrated to competitive energy suppliers.  In terms of the total number of CL&P customers, this equates to 14 percent being on competitive supply, while 86 percent remain with SS or LRS. Because this customer migration is only for energy supply service, it has no impact on CL&P's electric distribution business or its operating income.

As approved by PURA, CL&P periodically enters into full requirements supply contracts for SS loads for periods of up to one year. CL&P typically enters into full requirements supply contracts for LRS loads every three months. If CL&P does not obtain full requirements supply contracts for 100 percent of the customer load for any period, it is authorized by PURA to meet the remaining load obligations directly through the ISO-NE wholesale markets. Currently, CL&P has full requirements supply contracts in place for 80 percent of its SS load for the first half of 2023 and will self-manage the remaining 20 percent of the load obligation through the ISO-NE wholesale markets. For the second half of 2023, CL&P has 20 percent of its SS load under full requirements supply contracts and intends to purchase an additional 80 percent of full requirements. None of the SS load for 2024 has been procured. CL&P was unable to obtain a full requirements supply contract for its LRS load through March 2023 and will self-manage the LRS load through ISO-NE wholesale markets. CL&P intends to purchase 100 percent of full requirements for LRS for the remainder of 2023, but is prepared to self-manage the LRS load if CL&P is unable to obtain full requirements supply contracts for LRS.

ELECTRIC DISTRIBUTION – MASSACHUSETTS – NSTAR ELECTRIC COMPANY

NSTAR Electric's distribution business consists primarily of the purchase, delivery and sale of electricity to its residential, commercial and industrial customers. As of December 31, 2022, NSTAR Electric furnished retail franchise electric service to approximately 1.47 million customers in 140 cities and towns in eastern and western Massachusetts, including Boston, Cape Cod, Martha's Vineyard and the greater Springfield metropolitan area, covering an aggregate area of approximately 3,200 square miles.

NSTAR Electric does not own any generating facilities that are used to supply customers, and purchases its energy requirements from competitive energy suppliers.

NSTAR Electric owns, operates and maintains a total of 70 MW of solar power facilities on twenty-two sites in Massachusetts.  NSTAR Electric sells energy from these facilities into the ISO-NE market, with proceeds credited to customers.

Rates

NSTAR Electric is subject to regulation by the Massachusetts Department of Public Utilities (DPU), which, among other things, has jurisdiction over rates, certain dispositions of property and plant, mergers and consolidations, issuances of long-term securities, acquisition of securities, standards of service and construction and operation of facilities.  The present general rate structure for NSTAR Electric consists of various rate and service classifications covering residential, commercial and industrial services.

Under Massachusetts law, all customers of NSTAR Electric are entitled to choose their energy suppliers, while NSTAR Electric remains their electric distribution company.  For those customers who do not choose a competitive energy supplier, NSTAR Electric purchases power from competitive suppliers on behalf of, and passes the related cost without mark-up through to, those customers (basic service). Electric distribution companies in Massachusetts are required to obtain and resell power to retail customers through basic service for those who choose not to buy energy from a competitive energy supplier.  NSTAR Electric charges customers only the amount that it pays generators for producing electricity and does not earn a profit on the cost of electricity.

4

The rates established by the DPU for NSTAR Electric are comprised of the following:

•A basic service charge that represents the collection of energy costs incurred as a result of providing electric generation service supply to all customers who have not migrated to competitive energy suppliers, including costs related to charge-offs of uncollectible energy costs from customers.  Basic service rates are reset every six months (every three months for large commercial and industrial customers). Additionally, the DPU has authorized NSTAR Electric to recover the cost of its NSTAR Green wind contracts through the basic service charge. Basic service costs are reconciled annually, with any differences refunded to, or recovered from, customers.

•A distribution charge, which includes a fixed customer charge and a demand and/or energy charge to collect the costs of building and expanding the distribution infrastructure to deliver electricity to its destination, as well as ongoing operating costs.

•A revenue decoupling adjustment that reconciles annual base distribution rate recovery amounts recovered from customers to the pre-established level of baseline distribution delivery service revenue requirement approved by the DPU. Annual base distribution amounts are adjusted for inflation and filed for approval by the DPU on an annual basis, until the next rate case.

•A transmission charge that recovers the cost of transporting electricity over high-voltage lines from generating plants to substations, including costs allocated by ISO-NE to maintain the wholesale electric market. The transmission charge is reconciled annually to actual costs incurred, and reviewed by the DPU, with any difference refunded to, or recovered from, customers.

•A transition charge that represents costs to be collected primarily from previously held investments in generating plants, costs related to existing above-market power contracts, and contract costs related to long-term power contract buy-outs. The transition charge is reconciled annually to actual costs incurred, and reviewed by the DPU, with any difference refunded to, or recovered from, customers.

•A renewable energy charge that represents a legislatively-mandated charge to support the Massachusetts Renewable Energy Trust Fund.

•An energy efficiency charge that represents a legislatively-mandated charge to collect costs for energy efficiency programs. The energy efficiency charge is reconciled annually to actual costs incurred, and reviewed by the DPU, with any difference refunded to, or recovered from, customers.

•Reconciling adjustment charges that recover certain DPU-approved costs, including pension and PBOP benefits, low income customer discounts, credits issued to net-metering facilities installed by customers, payments to solar facilities qualified under the state solar renewable energy target program, attorney general consultant expenses, long-term renewable contracts, company-owned solar facilities, vegetation management costs, storm restoration, credits related to the Tax Cuts and Jobs Act of 2017, grid modernization costs, advanced metering infrastructure costs, electric vehicle make-ready infrastructure costs and provisional system planning charges. These charges are reconciled annually to actual costs incurred, and reviewed by the DPU, with any difference refunded to, or recovered from, customers.

As approved by the DPU, NSTAR Electric has signed long-term commitments for the purchase of energy from renewable energy facilities.

Distribution Rate Case: NSTAR Electric distribution rates were established in a November 2022 DPU-approved rate case, with rates effective January 1, 2023. The DPU approved a renewal of the performance-based ratemaking (PBR) plan originally authorized in its last rate case for a five-year term, with a corresponding stay out provision. The PBR plan term has the possibility of a five-year extension. The PBR mechanism allows for an annual adjustment to base distribution rates for inflation, exogenous events and future capital additions based on a historical five-year average of total capital additions. For further information, see "Regulatory Developments and Rate Matters - Massachusetts" in the accompanying Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations.

Service Quality Metrics: NSTAR Electric is subject to service quality (SQ) metrics that measure safety, reliability and customer service, and could be required to pay to customers a SQ charge of up to 2.5 percent of annual transmission and distribution revenues for failing to meet such metrics. NSTAR Electric will not be required to pay a SQ charge for its 2022 performance as the company achieved results at or above target for all of its SQ metrics in 2022.

Sources and Availability of Electric Power Supply

As noted above, NSTAR Electric does not own any generation assets (other than 70 MW of solar power facilities that produce energy that is sold into the ISO-NE market) and purchases its energy supply requirements from a variety of competitive sources through requests for proposals issued periodically, consistent with DPU regulations. As approved by the DPU, NSTAR Electric enters into supply contracts for basic service for approximately 35 percent of its residential and 25 percent of its small commercial and industrial (C&I) customers twice per year for twelve-month terms. NSTAR Electric enters into supply contracts for basic service for 11 percent of its large C&I customers every three months.

During 2022, NSTAR Electric supplied approximately 18 percent of its overall customer load at basic service rates. The remaining 82 percent of its overall customer load was served either by municipal aggregation or competitive supply. Because customer migration is limited to energy supply service, it has no impact on NSTAR Electric’s electric distribution business or operating income of NSTAR Electric.

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ELECTRIC DISTRIBUTION – NEW HAMPSHIRE – PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE

PSNH's distribution business consists primarily of the purchase, delivery and sale of electricity to its residential, commercial and industrial customers. As of December 31, 2022, PSNH furnished retail franchise electric service to approximately 535,000 retail customers in 211 cities and towns in New Hampshire, covering an area of approximately 5,630 square miles. PSNH does not own any electric generation facilities.

Rates

PSNH is subject to regulation by the New Hampshire Public Utilities Commission (NHPUC), which, among other things, has jurisdiction over rates, certain dispositions of property and plant, mergers and consolidations, issuances of securities, standards of service and construction and operation of facilities.

Under New Hampshire law, all of PSNH's customers are entitled to choose competitive energy suppliers.  For those customers who do not choose a competitive energy supplier, PSNH purchases power on behalf of, and passes the related cost without mark-up through to, those customers (default energy service). PSNH charges customers only the amount that it pays generators for producing electricity and does not earn a profit on the cost of electricity.

The rates established by the NHPUC for PSNH are comprised of the following:

•A default energy service charge recovers energy-related costs incurred as a result of providing electric generation service supply to all customers who have not migrated to competitive energy suppliers.

•A distribution charge, which includes kilowatt-hour and/or demand-based charges to recover costs related to the maintenance and operation of PSNH's infrastructure to deliver power to its destination, as well as power restoration and service costs.  It also includes a customer charge to collect the cost of providing service to a customer; such as the installation, maintenance, reading and replacement of meters and maintaining accounts and records.  

•A transmission charge that recovers the cost of transporting electricity over high-voltage lines from generating plants to substations, including costs allocated by ISO-NE to maintain the wholesale electric market.

•A Stranded Cost Recovery Charge (SCRC), which allows PSNH to recover its stranded costs, including above-market expenses incurred under mandated power purchase obligations, other long-term investments and obligations, and the remaining costs associated with the 2018 sales of its generation facilities.

•A Systems Benefits Charge (SBC), which funds energy efficiency programs for all customers, as well as assistance programs for residential customers within certain income guidelines.

•A Regulatory Reconciliation Adjustment (RRA) that reconciles the difference between certain estimated and actual costs included in base distribution rates, including costs related to regulatory assessments, vegetation management program expenses, property tax expenses, storm cost amortization updated for the actual cost of long-term debt and lost base revenues related to net metering.

As approved by the NHPUC, PSNH has signed long-term commitments for the purchase of energy from renewable energy facilities.

The default energy service charge changes semi-annually, the SCRC rate changes annually with the option to change semi-annually beginning in 2023, and the transmission and SBC rates change annually. These rates are reconciled annually in accordance with the policies and procedures of the NHPUC, with any differences refunded to, or recovered from, customers.

Distribution Rate Case: PSNH’s distribution rates were established in a December 2020 NHPUC-approved settlement agreement, with rates effective January 1, 2021. PSNH was also permitted three step increases, effective January 1, 2021, August 1, 2021, and August 1, 2022, to reflect plant additions in calendar years 2019, 2020 and 2021, respectively. On October 20, 2022, the NHPUC approved the third step adjustment for 2021 plant in service to recover a revenue requirement of $8.9 million, with rates effective November 1, 2022. The total approved revenue requirement increase is being collected over the remainder of the rate year (November 1, 2022 – July 31, 2023).

Sources and Availability of Electric Power Supply

PSNH does not own any generation assets and as approved by the NHPUC, purchases energy supply from a variety of competitive suppliers for its energy service customers through requests for proposals issued twice per year, for six-month terms, for approximately 81 percent of its residential and small C&I customers and for 17 percent of its large C&I customers.

During 2022, PSNH supplied approximately 48 percent of its customer load at default energy service rates while the other 52 percent of its customer load had migrated to competitive energy suppliers. Because this customer migration is only for energy supply service, it has no impact on PSNH’s electric distribution business or its operating income.

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ELECTRIC TRANSMISSION SEGMENT

CL&P, NSTAR Electric and PSNH each own and maintain transmission facilities that are part of an interstate power transmission grid over which electricity is transmitted throughout New England.  Each of CL&P, NSTAR Electric and PSNH, and most other New England utilities, are parties to a series of agreements that provide for coordinated planning and operation of the region's transmission facilities and the rules by which they acquire transmission services.  Under these arrangements, ISO-NE, a non-profit corporation whose board of directors and staff are independent of all market participants, serves as the regional transmission organization of the New England transmission system.  

Wholesale Transmission Rates

Wholesale transmission revenues are recovered through FERC-approved formula rates.  Annual transmission revenue requirements include recovery of transmission costs and include a return on equity applied to transmission rate base. Transmission revenues are collected from New England customers, including distribution customers of CL&P, NSTAR Electric and PSNH.  The transmission rates provide for an annual true-up of estimated to actual costs.  The financial impacts of differences between actual and estimated costs are deferred for future recovery from, or refund to, transmission customers.

Transmission Rate Base

Transmission rate base under our FERC-approved tariff primarily consists of our investment in transmission net utility plant less accumulated deferred income taxes. Under our FERC-approved tariff, investments in net utility plant generally enter rate base after they are placed in commercial operation. At the end of 2022, our estimated transmission rate base was approximately $9.2 billion, including approximately $4.0 billion at CL&P, $3.7 billion at NSTAR Electric, and $1.5 billion at PSNH.

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.

In response to appeals of the FERC decision in the first complaint filed by the NETOs and the Complainants, the U.S. Court of Appeals for the D.C. Circuit (the Court) issued a decision on April 14, 2017 vacating and remanding the FERC's decision. 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.

During 2019 and 2020, FERC has also issued multiple decisions in two pending transmission ROE complaints against the Midcontinent ISO (MISO) transmission owners, in which FERC adopted new methodologies for determining base ROEs. On August 9, 2022, the Court issued a decision vacating these decisions and remanded to FERC to reopen the proceedings. At this time, Eversource cannot predict how and when FERC will address the Court’s findings on the remand of the MISO FERC opinions or any potential associated impact on the NETOs’ four pending ROE complaint cases.

Given the significant uncertainty regarding the applicability of the FERC opinions in the MISO transmission owners' two complaint cases to the NETOs' pending four complaint cases, Eversource concluded that there is no reasonable basis for a change to the reserve or recognized ROEs for any of the complaint periods at this time. As well, Eversource cannot reasonably estimate a range of loss for any of the four complaint proceedings at this time.

For further information, see "FERC Regulatory Matters - FERC ROE Complaints" in the accompanying Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations.

NATURAL GAS DISTRIBUTION SEGMENT

On October 9, 2020, Eversource acquired certain assets and liabilities that comprised the NiSource Inc. (NiSource) natural gas distribution business in Massachusetts, which was previously doing business as Columbia Gas of Massachusetts (CMA), pursuant to an asset purchase agreement (the Agreement) entered into on February 26, 2020 between Eversource and NiSource. The cash purchase price was $1.1 billion, plus a working capital amount of $68.6 million, as finalized in 2021. The natural gas distribution assets acquired from CMA were assigned to Eversource Gas Company of Massachusetts (EGMA), an indirect wholly-owned subsidiary of Eversource formed in 2020. The LNG assets acquired from CMA were assigned to Hopkinton LNG Corp, also a subsidiary of Eversource.

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NSTAR Gas distributes natural gas to approximately 306,000 customers in 52 communities in central and eastern Massachusetts covering 1,104 square miles. EGMA distributes natural gas to approximately 333,000 customers in 65 communities throughout Massachusetts covering 1,206 square miles. Yankee Gas distributes natural gas to approximately 251,000 customers in 74 cities and towns in Connecticut covering 2,632 square miles. Total throughput (sales and transportation) in 2022 was approximately 66.1 Bcf for NSTAR Gas, 54.3 Bcf for EGMA, and 58.4 Bcf for Yankee Gas. Our natural gas businesses provide firm natural gas sales and transportation service to eligible retail customers who require a continuous natural gas supply throughout the year, such as residential customers who rely on natural gas for heating, hot water and cooking needs, as well as commercial and industrial customers who rely on natural gas for space heating, hot water, cooking and commercial and industrial applications.

NSTAR Gas, EGMA and Yankee Gas generate revenues primarily through the sale and/or transportation of natural gas.  All NSTAR Gas and EGMA retail customers have the ability to choose to purchase gas from third party marketers under the Massachusetts Retail Choice program. In the past year in Massachusetts, Retail Choice represented only approximately one percent of the total residential load, while Retail Choice represented approximately 56 percent of the total commercial and industrial load. Retail natural gas service in Connecticut is partially unbundled: residential customers in Yankee Gas' service territory buy natural gas supply and delivery only from Yankee Gas while commercial and industrial customers may choose their natural gas suppliers. For customers who purchase natural gas from NSTAR Gas, EGMA and Yankee Gas, the purchased natural gas commodity cost is passed through to those customers without mark-up. NSTAR Gas, EGMA and Yankee Gas do not earn a profit on the cost of purchased gas.

Firm transportation service is offered to customers who purchase natural gas from sources other than NSTAR Gas, EGMA or Yankee Gas. NSTAR Gas and EGMA have the ability to offer interruptible transportation and interruptible natural gas sales service to high volume commercial and industrial customers. Yankee Gas offers interruptible transportation and interruptible natural gas sales service to commercial and industrial customers who have the ability to switch from natural gas to an alternate fuel on short notice. NSTAR Gas, EGMA and Yankee Gas can interrupt service to these customers during peak demand periods or at any other time to maintain distribution system integrity.

A portion of the storage of natural gas supply for NSTAR Gas and EGMA during the winter heating season is provided by Hopkinton LNG Corp., an indirect, wholly-owned subsidiary of Eversource Energy. NSTAR Gas has access to facilities consisting of an LNG liquefaction and vaporization plant and three above-ground cryogenic storage tanks having an aggregate capacity of 3.0 Bcf of liquefied natural gas and facilities that include additional storage capacity of 0.5 Bcf. Total vaporization capacity of these facilities is 0.21 Bcf per day. EGMA has access to approximately 1.8 Bcf of LNG and 0.1 Bcf of LPG storage, with a total vaporization capacity of 0.14 Bcf per day. Yankee Gas owns a 1.2 Bcf LNG facility, which also has the ability to liquefy and vaporize up to 0.1 Bcf per day. This facility is used primarily to assist Yankee Gas in meeting its supplier-of-last-resort obligations and also enables it to provide economic supply and make economic refill of natural gas, typically during periods of low demand.

Rates

NSTAR Gas and EGMA are subject to regulation by the DPU and Yankee Gas is subject to regulation by the PURA, both of which, among other things, have jurisdiction over rates, certain dispositions of property and plant, mergers and consolidations, issuances of long-term securities, standards of service and construction and operation of facilities.

Retail natural gas delivery and supply rates are established by the DPU and the PURA and are comprised of:

•A distribution charge consisting of a fixed customer charge and a demand and/or energy charge that collects the costs of building, maintaining, and expanding the natural gas infrastructure to deliver natural gas supply to its customers.  This also includes collection of ongoing operating costs.

•A seasonal cost of gas adjustment clause (CGAC) at NSTAR Gas and EGMA that collects natural gas supply costs, pipeline and storage capacity costs, costs related to charge-offs of uncollected energy costs and working capital related costs.  The CGAC is reset semi-annually with any difference being recovered from, or refunded to, customers during the following corresponding season. In addition, NSTAR Gas and EGMA file interim changes to the CGAC factor when the actual costs of natural gas supply vary from projections by more than five percent.

•A Purchased Gas Adjustment (PGA) clause at Yankee Gas that collects the costs of the procurement of natural gas for its firm and seasonal customers. The PGA is evaluated monthly.  Differences between actual natural gas costs and collection amounts from September 1st through August 31st of each PGA year are deferred and then recovered from, or refunded to, customers during the following PGA year.  Carrying charges on outstanding balances are calculated using Yankee Gas' weighted average cost of capital in accordance with the directives of the PURA.

•A local distribution adjustment clause (LDAC) at NSTAR Gas and EGMA that collects all energy efficiency and related program costs, environmental costs, pension and PBOP related costs, attorney general consultant costs, credits related to the Tax Cuts and Jobs Act of 2017, gas system enhancement program (GSEP) costs, costs associated with low income customers, and costs associated with a geothermal pilot program.  The LDAC is reset annually with any difference being recovered from, or refunded to, customers during the following period and provides for the recovery of certain costs applicable to both sales and transportation customers.

•A Conservation Adjustment Mechanism (CAM) at Yankee Gas, which allows 100 percent recovery of conservation costs through this mechanism including program incentives to promote energy efficiency.  A reconciliation of CAM revenues to expenses is performed annually with any difference being recovered from, or refunded to, customers with carrying charges during the following year.

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•A Gas System Improvement (GSI) reconciliation mechanism at Yankee Gas, which collects the costs of certain Distribution Integrity Management Program (DIMP) and core capital plant in service above and beyond the level that is recovered through the distribution charge. The GSI is adjusted and reconciled annually, with any differences refunded to, or recovered from, customers.

•A System Expansion Rate (SER) reconciliation mechanism at Yankee Gas, which compares distribution system expansion investment costs and revenues for new customers, with the level projected in current distribution customer rates.  This reconciliation is performed annually and customer rates are adjusted accordingly.

•A Revenue Decoupling Mechanism (RDM) at NSTAR Gas and EGMA that reconciles annual base distribution rate recovery amounts recovered from customers to the pre-established level of baseline distribution delivery service revenue requirement approved by the DPU. The pre-established level of baseline distribution delivery service revenue requirement is also subject to adjustment in accordance with provisions of the November 2020 NSTAR Gas distribution rate case and the October 2020 EGMA rate settlement agreement.

•A RDM at Yankee Gas that reconciles annual base distribution rate recovery amounts recovered from customers to the pre-established level of baseline distribution delivery service revenue requirement approved by PURA. The pre-established level of baseline distribution delivery service revenue requirement is also subject to adjustment in accordance with provisions of the 2018 rate case settlement agreement.

Distribution Rate Cases:

NSTAR Gas: NSTAR Gas distribution rates were established in an October 2020 DPU-approved rate case, with rates effective November 1, 2020. The DPU also approved a 10-year performance-based ratemaking plan through November 1, 2030, which includes inflation-based adjustments to annual base distribution amounts effective annually beginning November 1, 2021.

EGMA: EGMA’s distribution rates were established in a DPU-approved October 7, 2020 rate settlement agreement, with rate increases on November 1, 2021 and November 1, 2022, and two rate base resets during an eight-year rate plan, occurring on November 1, 2024 and November 1, 2027. Notwithstanding the two distribution rate increases, the two rate base reset provisions, and potential adjustments for qualifying exogenous events, EGMA agreed not to file for an increase or redesign of distribution base rates effective prior to November 1, 2028.

Yankee Gas: Yankee Gas distribution rates were established in a December 2018 PURA-approved rate case settlement agreement, with rates effective November 15, 2018. PURA also approved step adjustments effective January 1, 2019, January 1, 2020 and March 1, 2021.

Service Quality Metrics: NSTAR Gas and EGMA are subject to SQ metrics that measure safety, reliability and customer service and each could be required to pay to customers a SQ charge of up to 2.5 percent of annual distribution revenues for failing to meet such metrics.  NSTAR Gas and EGMA will not be required to pay an SQ charge for their 2022 performance as each achieved results at or above target for all of their SQ metrics in 2022.

Natural Gas Replacement

Massachusetts: Pursuant to Massachusetts legislation, in October of each year, NSTAR Gas and EGMA file GSEP Plans with the DPU for the following construction year. The GSEP Program is designed to accelerate the replacement of certain natural gas distribution facilities in the system to less than 25 years.  The GSEP includes a tariff that provides NSTAR Gas and EGMA an opportunity to collect the costs for the program on an annual basis through a reconciling factor.  On April 30th each year, the DPU approves the GSEP rate recovery factor that goes into effect on May 1st.

In October 2020, the DPU opened Docket “DPU 20-80 The Future of Gas” to examine the role of Massachusetts natural gas local distribution companies (LDCs) in helping to meet the state’s 2050 climate goals. The DPU will consider new policies and structures that would protect customers as Massachusetts works to decarbonize the building sector, potentially recasting the role of LDCs in Massachusetts, which may require significant changes to the LDCs planning processes and business models. At this time, Eversource cannot predict the ultimate outcome of this proceeding and the resulting impact to its natural gas businesses, however the Company does not believe there is any indication of an inability to recover costs or risk of impairment of our natural gas assets at this time.

Connecticut: Yankee Gas' December 2018 PURA-approved rate case settlement agreement included an accelerated pipeline replacement cost recovery program. The Gas System Improvement (GSI) rate recovers accelerated pipeline replacement as well as other capital investment through an annual reconciliation. Yankee Gas files its GSI reconciliation annually on March 1st for rates effective April 1st.

In September 2021, PURA undertook a review of Connecticut natural gas companies’ infrastructure system expansion plan (SEP) to determine if the SEP continues to be in the best interest of the state’s comprehensive energy strategy. On April 27, 2022, PURA issued an order for the immediate winding down of the SEP by (1) ending the enrollment of new customers in the SEP program and permitting only a specific group of potential customers who have executed a services agreement with a natural gas company on or before a specified date (subsequently approved as August 16, 2022) to qualify for incentives under the current SEP; (2) directing all surplus non-firm margin to be deferred as a regulatory liability and applied to rate base in a future rate proceeding; and (3) directing the natural gas companies to cease all outbound and passive marketing regarding the SEP. On July 15, 2022, Eversource appealed the portion of this order pertaining to the deferral of non-firm margin as a reduction to future rate base. Eversource evaluated the prospective impact of this proceeding and does not believe the impact will be material to its future financial position, results of operations and cash flows.

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Sources and Availability of Natural Gas Supply

NSTAR Gas maintains a flexible resource portfolio consisting of natural gas supply contracts, transportation contracts on interstate pipelines, market area storage and peaking services. NSTAR Gas purchases transportation, storage, and balancing services from Tennessee Gas Pipeline Company and Algonquin Gas Transmission Company, as well as other upstream pipelines that transport natural gas from major natural gas producing regions in the U.S., including the Gulf Coast, Mid-continent region, and Appalachian Shale supplies to the final delivery points in the NSTAR Gas service area. NSTAR Gas purchases all of its natural gas supply under a firm, competitively bid annual portfolio management contract. In addition to the firm transportation and natural gas storage supplies discussed above, NSTAR Gas utilizes on-system LNG facilities to meet its winter peaking demands. These LNG facilities are located within NSTAR Gas' distribution system and are used to liquefy and store pipeline natural gas during the warmer months for vaporization and use during the heating season. During the summer injection season, excess pipeline capacity and supplies are used to deliver and store natural gas in market area underground storage facilities located in Maryland and Pennsylvania. Stored natural gas is withdrawn during the winter season to supplement flowing pipeline supplies in order to meet firm heating demand. NSTAR Gas has firm underground storage contracts and total storage capacity entitlements of approximately 6.6 Bcf, and 3.5 Bcf LNG storage is provided by Hopkinton LNG Corp. in facilities located in two different locations in Massachusetts.

EGMA maintains a flexible resource portfolio consisting of natural gas supply contracts, transportation contracts on interstate pipelines, market area storage and peaking services. EGMA purchases transportation, storage, and balancing services from Tennessee Gas Pipeline Company and Algonquin Gas Transmission Company, as well as other upstream pipelines that transport natural gas from major natural gas producing regions in the U.S. as well as Canada, including the Gulf Coast, Mid-continent region, Appalachian Shale, and Dawn, Ontario supplies to the final delivery points in the EGMA service area. EGMA purchases the majority of its natural gas supply under a number of firm, competitively bid annual portfolio management contracts and manages a portion of its portfolio itself. In addition to the firm transportation and natural gas storage supplies discussed above, EGMA utilizes on-system LNG and LPG facilities to meet its winter peaking demands. These LNG and LPG facilities are located within EGMA’s distribution system and are used to liquefy pipeline natural gas and/or receive liquefied natural gas or liquefied petroleum gas to be stored during the warmer months for vaporization and use during the heating season. During the summer injection season, excess pipeline capacity and supplies are used to deliver and store natural gas in market area underground storage facilities located in Maryland and Pennsylvania. Stored natural gas is withdrawn during the winter season to supplement flowing pipeline supplies in order to meet firm heating demand. EGMA has firm underground storage contracts and total storage capacity entitlements of approximately 8.6 Bcf, and 1.9 Bcf LNG and LPG storage is provided by Hopkinton LNG Corp. in facilities located at seven different locations in Massachusetts.

PURA requires Yankee Gas to meet the needs of its firm customers under all weather conditions. Specifically, Yankee Gas must structure its supply portfolio to meet firm customer needs under a design day scenario (defined as the coldest day in 30 years) and under a design year scenario (defined as the average of the four coldest years in the last 30 years). Yankee Gas also maintains a flexible resource portfolio consisting of natural gas supply contracts, transportation contracts on interstate pipelines, off-system storage and its on-system 1.2 Bcf LNG storage facility in Connecticut to meet consumption needs during the coldest days of winter. Yankee Gas obtains its interstate capacity from the three interstate pipelines that directly serve Connecticut: the Algonquin, Tennessee and Iroquois Pipelines, which connect to other upstream pipelines that transport natural gas from major natural gas producing regions, including the Gulf Coast, Mid-continent, Canadian regions and Appalachian Shale supplies.

Based on information currently available regarding projected growth in demand and estimates of availability of future supplies of pipeline natural gas, each of NSTAR Gas, EGMA and Yankee Gas believes that in order to meet the long-term firm customer requirements in a reliable manner, a combination of pipeline, storage, and non-pipeline solutions will be necessary.

WATER DISTRIBUTION SEGMENT

Aquarion Company (Aquarion) operates five separate regulated water utilities in Connecticut (Aquarion Water Company of Connecticut, or AWC-CT, and The Torrington Water Company), Massachusetts (Aquarion Water Company of Massachusetts, or AWC-MA), and New Hampshire (Aquarion Water Company of New Hampshire, or AWC-NH, and Abenaki Water Company). These regulated companies provide water services to approximately 237,000 residential, commercial, industrial, municipal and fire protection and other customers, in 72 towns and cities in Connecticut, Massachusetts and New Hampshire. As of December 31, 2022, approximately 92 percent of Aquarion’s customers were based in Connecticut.

Rates

Aquarion's water utilities are subject to regulation by the PURA, the DPU and the NHPUC in Connecticut, Massachusetts and New Hampshire, respectively. These regulatory agencies have jurisdiction over, among other things, rates, certain dispositions of property and plant, mergers and consolidations, issuances of long-term securities, standards of service and construction and operation of facilities.

Aquarion’s general rate structure consists of various rate and service classifications covering residential, commercial, industrial, and municipal and fire protection services.

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The rates established by the PURA, DPU and NHPUC are comprised of the following:

•A base rate, which is comprised of fixed charges based on meter/fire connection sizes, as well as volumetric charges based on the amount of water sold. Together these charges are designed to recover the full cost of service resulting from a general rate proceeding.

•In Connecticut, a revenue adjustment mechanism (RAM) that reconciles earned revenues, with certain allowed adjustments, on an annual basis, to the revenue requirement approved by PURA.

•In Connecticut and New Hampshire, a water infrastructure conservation adjustment (WICA) charge, and in Massachusetts, an annual main replacement adjustment mechanism (MRAM) charge, which is applied between rate case proceedings and seeks recovery of allowed costs associated with eligible infrastructure improvement projects placed in-service. The WICA is updated semi-annually in Connecticut and annually in New Hampshire. In Connecticut, an annual WICA reconciliation mechanism reconciles earned WICA revenue to the approved WICA revenue with any differences refunded to, or recovered from, customers.

Sources and Availability of Water Supply

Our water utilities obtain their water supplies from owned surface water sources (reservoirs) and groundwater supplies (wells) with a total supply yield of approximately 133 million gallons per day, as well as water purchased from other water suppliers. Approximately 98 percent of our annual production is self-supplied and processed at nine surface water treatment plants and numerous well stations, which are all located in Connecticut, Massachusetts, and New Hampshire.

The capacities of Aquarion’s sources of supply, and water treatment, pumping and distribution facilities, are considered sufficient to meet the present requirements of Aquarion’s customers under normal conditions. On occasion, drought declarations are issued for portions of Aquarion’s service territories in response to extended periods of dry weather conditions.

OFFSHORE WIND BUSINESS

Eversource's offshore wind business includes a 50 percent ownership interest in North East Offshore, which holds power purchase agreements (PPAs) and contracts for the Revolution Wind, South Fork Wind and Sunrise Wind projects, as well as an undeveloped offshore lease area. Our offshore wind projects are being developed and constructed through a joint and equal partnership with Ørsted.

The offshore leases include a 257 square-mile ocean lease off the coasts of Massachusetts and Rhode Island and a separate, adjacent 300 square-mile ocean lease located approximately 25 miles south of the coast of Massachusetts. In aggregate, these ocean lease sites jointly-owned by Eversource and Ørsted could eventually develop at least 4,000 MW of clean, renewable offshore wind energy.

Revolution Wind is a 704 MW offshore wind power project located approximately 15 miles south of the Rhode Island coast, and South Fork Wind is a 130 MW offshore wind power project located approximately 35 miles east of Long Island. Sunrise Wind is a 924 MW offshore wind facility, which will be developed 35 miles east of Montauk Point, Long Island. The completion dates for these projects are subject to federal permitting through BOEM, engineering, state siting and permitting in New York, Rhode Island and Massachusetts and construction schedules. We have initiated a strategic review of our offshore wind investment portfolio. As part of that review, we are exploring strategic alternatives that could result in a potential sale of all, or part, of our 50 percent interest in our offshore wind partnership with Ørsted. For more information on these projects and on the strategic review, see "Business Development and Capital Expenditures – Offshore Wind Business" in the accompanying Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations.

CAPITAL EXPENDITURES

For information on capital expenditures and projects during 2022, as well as projected capital expenditures by business, see "Business Development and Capital Expenditures" in the accompanying Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations.

FINANCING

For information regarding short-term and long-term debt agreements, see "Liquidity" in the accompanying Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations, and Note 8, "Short-Term Debt," and Note 9, "Long-Term Debt," of the Combined Notes to Financial Statements.

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NUCLEAR FUEL STORAGE

CL&P, NSTAR Electric, PSNH, and several other New England electric utilities are stockholders in three inactive regional nuclear generation companies, CYAPC, MYAPC and YAEC (collectively, the Yankee Companies).  The Yankee Companies have completed the physical decommissioning of their respective nuclear power facilities and are now engaged in the long-term storage of their spent nuclear 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 we believe are adequate to recover the remaining plant closure and fuel storage cost estimates for the respective plants. We believe 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.

We consolidate the assets and obligations of CYAPC and YAEC on our consolidated balance sheet because our ownership and voting interests are greater than 50 percent of each of these companies.  

OTHER REGULATORY AND ENVIRONMENTAL MATTERS

General

We are regulated by various federal and state agencies, including FERC, the SEC, and various state and/or local regulatory authorities with jurisdiction over the industry and the service areas in which each of our companies operates, including the PURA, which has jurisdiction over CL&P, Yankee Gas, and Aquarion, the DPU, which has jurisdiction over NSTAR Electric, NSTAR Gas, EGMA and Aquarion, and the NHPUC, which has jurisdiction over PSNH and Aquarion.

Renewable Portfolio Standards

Each of the states in which we do business has Renewable Portfolio Standards (RPS) requirements, which generally require fixed percentages of our energy supply to come from renewable energy sources such as solar, wind, hydropower, landfill gas, fuel cells and other similar sources.

Connecticut's RPS statute requires increasing percentages of the electricity sold to retail customers to have direct ties to renewable sources. In 2022, the total RPS obligation was 33.0 percent and will ultimately reach 48.0 percent in 2030. CL&P is permitted to recover any costs incurred in complying with RPS from its customers through its generation service charge rate.

Massachusetts' RPS program requires electricity suppliers to meet renewable energy standards. For 2022, the RPS and Clean Energy Standard (CES) requirements were 51.3 percent, and will ultimately reach 64.3 percent in 2025. Massachusetts electric suppliers were also required to meet Alternative Energy Portfolio Standards (APS) of 5.5 percent and Clean Peak Energy Standards (CPS) of 4.5 percent in 2022. Those requirements will reach 6.25 and 9.00 percent in 2025, respectively. NSTAR Electric is permitted to recover any costs incurred in complying with these requirements from its customers through rates. NSTAR Electric also owns renewable solar power facilities. The RECs generated from NSTAR Electric's solar power facilities are sold to other energy suppliers, and the proceeds from these sales are credited back to customers.

New Hampshire's RPS provision requires increasing percentages of the electricity sold to retail customers to have direct ties to renewable sources. In 2022, the total RPS obligation was 22.5 percent and it will ultimately reach 25.2 percent in 2025. The costs of the RECs are recovered by PSNH through rates charged to customers.

Environmental Regulation and Matters

We are subject to various federal, state and local environmental legislation and regulation with respect to water quality, air quality, natural/working lands (wetlands, resource areas, habitat), hazardous materials and other environmental matters. Our environmental policy includes formal procedures and a task-scheduling system in place to help ensure environmental compliance. The Board’s Governance, Environmental and Social Responsibility Committee also provides oversight of climate issues, environmental matters and compliance. We also identify and address potential environmental risks through our Enterprise Risk Management (ERM) program in addition to rigorous audits of our facilities, vendors, and processes.

Additionally, projects may not be constructed or significantly modified without a review of the environmental impact of the proposed construction or modification by the applicable federal or state agencies. Many of our construction projects require the submission of comprehensive permitting applications to various local, state and federal agencies. The permits we receive outline various best management practices and restoration requirements to address construction period-impacts.

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We have recorded a liability for what we believe, based upon currently available information, is our reasonably estimable environmental investigation, remediation, and/or natural resource damages costs for waste disposal sites for which we have probable liability. Under federal and state law, government agencies and private parties can attempt to impose liability on us for recovery of investigation and remediation costs at contaminated sites. As of December 31, 2022, the liability recorded for our reasonably estimable and probable environmental remediation costs for known sites needing investigation and/or remediation, exclusive of recoveries from insurance or from third parties, was $122.6 million, representing 59 sites. These costs could be significantly higher if additional remediation becomes necessary or when additional information as to the extent of contamination becomes available.

The most significant liabilities currently relate to future clean-up costs at former MGP facilities. These facilities were owned and operated by our predecessor companies from the mid-1800's to mid-1900's. By-products from the manufacture of natural gas using coal resulted in fuel oils, hydrocarbons, coal tar, purifier wastes, metals and other waste products that may pose a potential risk to human health and the environment. We currently have partial or full ownership responsibilities at former MGP sites that have a reserve balance of $112.6 million of the total $122.6 million as of December 31, 2022. MGP costs are recoverable through rates charged to our customers.

When planning environmental investigations and remediation of impacted properties, we work closely with the municipalities and environmental regulators to ensure that our remediation plans adhere to applicable regulations while protecting human health and the environment. In many cases, these remediation projects are designed to address opportunities for beneficial reuse of the property.

Global Climate Change and Greenhouse Gas Emission Issues

We assess the regulatory, physical and transitional impacts related to climate change to develop mitigation strategies including evaluating the impacts of more severe weather events, financial risks, changing customer behaviors, and opportunities to reduce emissions in our operations and for the region through clean energy and emerging technologies investments.

Regulatory Impacts of Climate Change: Global climate change continues to receive increasing focus from the federal and state governments. The Biden administration has communicated a strong focus on addressing climate change by setting a U.S. target of reducing greenhouse gas (GHG) emissions by 50 percent by 2030, compared to 2005 levels, and achieving net-zero emissions by 2050 economy-wide. The plan calls for aggressive measures focused on clean transportation, clean energy and climate investments targeted at environmental justice communities. In support of this plan, federal funding and incentive programs for clean transportation and energy offer opportunities for Eversource to invest in projects that have the ability to reduce emissions in the region while benefiting our communities and shareholders. Similarly, some of the states in which we operate have aggressive climate goals and implementation plans. In Connecticut, legislation includes a target to achieve zero-carbon electricity by 2040. In response to 2021 climate legislation, in 2022, Massachusetts finalized sub-limits for the transportation, building and electricity sectors, among others, in support of the state’s net zero emissions target by 2050. These state regulations and related policies may introduce risks and opportunities to our businesses if demands for energy or heating change or if investment opportunities for new projects present themselves.

We are continually evaluating the evolving regulatory landscape concerning climate change, which could potentially lead to additional requirements and additional rules and regulations that could impact how we operate our businesses. Potential future environmental statutes and regulations, such as additional greenhouse gas reduction regulations to address global climate change, could impose significant additional costs and there can be no assurance that regulators will approve the recovery of those costs.

Physical and Transitional Impacts of Climate Change: Eversource assesses the physical impacts of climate change that are event-driven or due to longer-term shifts in climate patterns, as well as transitional impacts related to a shift to a lower-carbon economy and changes to address mitigation and adaptation requirements. To address physical and transitional impacts related to climate change, maintain resiliency across our system, and enable potential opportunities for our business, we are pursuing the following actions:

•Improving our system resiliency in response to climate change through vegetation management, pole and wire strengthening, flood proofing, and other system hardening measures;

•Implementing a grid modernization plan that will enhance our electric distribution infrastructure to improve resiliency and reliability and increase opportunities to facilitate integration of distributed energy resources and electric vehicle infrastructure;

•Focusing on improving the efficiency of our electric and natural gas distribution systems, preparing for increased opportunities that clean energy advancements create, and providing customers with ways to optimize their energy efficiency;

•Investigating emerging technologies such as energy storage and automation programs that improve reliability;

•Implementing programs to address risks that may impact water availability and water quality; and

•Evaluating opportunities for our natural gas system and exploring alternative, less carbon-intense, technologies like renewable natural gas and geothermal for heating.

Physical risks from climate change may result from sea level rise and shifting weather conditions, such as changes in precipitation, extreme heat, more frequent and severe storms, droughts and floods. These risks may result in customers’ energy and water usage increasing or decreasing depending on the duration and magnitude of the changes, degradation of water quality and our ability to reliably deliver our services to customers. Severe weather may cause outages, potential disruption of operations, and property damage to our operating facilities.

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Our actions to improve system reliability and resiliency allow our business to operate under changing conditions and meet customer expectations. System improvements are designed to withstand severe weather impacts and include installing new and stronger infrastructure like poles, wires and related system equipment, as well as enhanced year-round tree trimming. We are reinforcing existing critical facilities to withstand storm surges and all future substations are being “flood hardened” to better protect our system against storm surges associated with the increasing risk of severe weather. We created our comprehensive emergency preparedness and response plans in partnership with state and community leaders so that when a storm occurs, we can provide customers and municipalities with timely and accurate information, while safely and promptly restoring power. Additionally, we collaborate with other utility providers and industry partners across the country to better understand storm hazards and develop solutions to improve our system reliability.

We have made a corporate commitment to reduce Scope 1 and 2 greenhouse gas emissions from our operations and reach carbon neutrality by 2030. In November 2022, we committed to setting a science-based target within the next two years, which will expand our emission reduction efforts to include indirect Scope 3 sources. Greenhouse gas emissions from our operations consist primarily of line loss (emissions associated with the energy lost when power is transmitted and distributed across the electric system), methane leaks from our natural gas distribution system, operating our facilities and vehicle fleet, and sulfur hexafluoride (SF6) leaks from electric equipment. To measure our influences on climate change, we quantify and publicly report our operational carbon footprint through a third-party verified GHG emission inventory on an annual basis. Our initiatives to reduce GHG emissions across our company include improving energy efficiency and expanding the use of renewable energy at our buildings, utilizing alternative fuels and introducing more hybrid vehicles into the company fleet, cutting fugitive emissions of methane and SF6 by replacing leaky natural gas pipes, improving maintenance of electrical equipment, and piloting innovative technologies.

Our business is also transitioning in response to climate change and we are enabling broad decarbonization of the electrical and building sectors in support of regional policies and targets. We actively support local, state and federal emission reduction goals to address climate change and pursue climate-related opportunities that enable continued business success while serving the needs of our customers. Our clean energy investments help reduce regional emissions while improving shareholder value. Meanwhile, our energy efficiency solutions and electric vehicle infrastructure investments allow our customers to make choices that minimize climate-related impacts.

Additionally, as our business transitions to support a low carbon economy, human capital needs will also change with the potential to impact our workforce. As new technologies are implemented, we will need to recruit, develop and possibly retrain employees to meet the need for new skill sets.

Electric and Magnetic Fields  

For more than forty years, published reports have discussed the possibility of adverse health effects from electric and magnetic fields (EMF) associated with electric transmission and distribution facilities, including appliances, and wiring in buildings and homes. Some epidemiology studies have reported a possible statistical association between adverse health effects and exposure with EMF. The association identified in some of these studies remain unexplained and inconclusive. Numerous scientific review panels, considering all significant EMF epidemiology and laboratory studies, have concluded that the available body of scientific information does not support a conclusion that EMF affects human health at levels expected in the vicinity. In accordance with recommendations of various regulatory bodies and public health organizations, we use design principles that help reduce potential EMF exposures associated with new transmission lines.

HUMAN CAPITAL

Eversource is committed to delivering reliable energy and superior customer service; expanding energy options for our region; environmental stewardship; a safe, diverse and fairly-compensated workforce; and community service and leadership. Our employees are critical to achieving this mission and we recognize the importance of attracting, retaining, growing and developing our employees. Leaders at all levels strive to create a workplace where our employees are engaged, advocate for the customer, work collaboratively, raise ideas for improvement and focus on delivering a superior customer experience. We build employee engagement through continuous communication, developing talent, fostering teamwork and creating a diverse, equitable and inclusive workplace.

As of December 31, 2022, Eversource Energy employed a total of 9,626 employees, excluding temporary employees, of which 1,444 were employed by CL&P, 1,648 were employed by NSTAR Electric, and 796 were employed by PSNH. In addition, 3,664 were employed by Eversource Service, Eversource's service company, that provides support services to all Eversource operating companies. Approximately 50 percent of our employees are members of the International Brotherhood of Electrical Workers, the Utility Workers Union of America or The United Steelworkers, and are covered by 13 collective bargaining agreements.

Safety. At Eversource, our commitment to “Safety First and Always” is a principle and a mindset present in every job and every task, whether in the field, office or at home. A priority at Eversource is continuous improvement and safety is at the forefront as we continue to build a strong safety culture, embrace new technologies, and learn with our industry and community partners to improve safety performance. We use metrics such as Eversource Corporate Days Away Restricted Time (DART) and Preventable Motor Vehicle events, among others, to monitor safety performance. Our DART safety performance was 1.0 in 2022, measured by days away, restricted or transferred per 100 workers, using the DART-OSHA method of measurement.

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Diversity, Equity & Inclusion. Our commitment to Diversity, Equity & Inclusion (DEI) is critical to building a diverse, empowered and engaged team that delivers great service safely to our customers. A diverse workforce and inclusive culture contribute to our success and sustainability by driving innovation and creating trusted relationships with our employees, customers, suppliers and community partners. We continue to identify and support many programs and agencies that address racial and ethnic disparities in our communities and beyond. We also remain committed to developing a workforce that fully reflects the diversity of the people and communities we serve. Our hiring practices emphasize diversity, equity and inclusion and we encourage employees to embrace different people, perspectives and experiences in our workplace and within our communities. Additionally, our leadership behaviors underscore the importance of creating inclusive teams, where employees’ voices and contributions are essential to delivering superior customer service.

Eversource continues to develop a diverse workforce with an increased focus on women and minorities in leadership and has DEI goals and initiatives for diversity in leadership promotions and new hires, diverse external hires, diverse candidate slate, key talent, workforce representation, leadership engagement, community support and supplier spends. Eversource drives accountability for DEI progress throughout the company and executive compensation is linked to meeting these goals. We sustained our successful drive to increase workforce diversity; in 2022, 61.6% of our external hires were women and/or people of color and 45.1% percent of new hires and promotions into leadership roles were women and/or people of color.

Eversource’s executive leadership team promotes and supports DEI by leading and building diverse, inclusive work teams with high engagement, growing a pipeline of diverse talent, leveraging multiple perspectives to improve customer service, using diverse suppliers, engaging with multicultural organizations in our communities and supporting the work of our DEI council, racial equity task force, business resource groups, and our cross-functional pro-equity advisory team, which developed and began to implement justice and equity training to all employees in 2022.

Eversource's Board of Trustees is committed to diversity, equity and inclusion and receives regular monthly progress updates. The Corporate Governance, Environmental and Social Responsibility Committee of the Board of Trustees is responsible for the oversight of environmental, human capital management and social responsibility strategy, programs and policies. The Board of Trustees seeks diversity in gender, race/ethnicity and personal background when considering Trustee candidates.

Compensation, Health and Wellness Benefits. We are committed to the health, safety and wellness of our employees. We provide competitive compensation and comprehensive benefit packages, including healthcare, life insurance, long-term disability insurance, death benefits, retirement plans (defined benefit pension plans or 401k Plan), an Employee Stock Purchase Plan, health savings and flexible spending accounts, paid time off, employee assistance programs, and tuition assistance, among many others. Eversource also provides wellness programs and benefits to encourage employees and their families to adopt and maintain healthy lifestyle habits.

Talent Development, Training Programs and Education Opportunities. Strategic workforce plans are developed every year as part of the annual business planning process to identify immediate and long-range needs to ensure that we acquire, develop and retain diverse, capable talent. Eversource supports and develops its employees through training and development programs that build and strengthen employees’ leadership and skill set. Employee development programs are aligned to our strategic workforce plan to support succession within all levels of the organization. Continuous professional development is important to support our employees’ ongoing success. These professional development programs include leadership effectiveness programs designed to develop new and current supervisors; a talent management process to identify high potential and emerging talent and ensure their development; a rotational associate engineering program; educational and professional development opportunities for employees who are recent college graduates; tuition assistance program; and paid internships and co-ops.

We leverage educational partnerships in critical trade and technical areas and have developed proactive sourcing strategies to attract experienced workers in highly technical roles in engineering, electric and gas operations, and energy efficiency. As part of this process, we identify critical roles and develop succession plans to ensure we have a capable supply of talent for the future.

Community & Social Impact. Eversource and our employees support many programs, agencies, and not-for-profit organizations that provide economic and community development, the environment, and initiatives that address local, high-priority concerns and needs. Eversource provides donations and other support to community agencies, including significant volunteer hours of our employees.

See Item 11, Executive Compensation, included in this Annual Report on Form 10-K, as well as our 2021 Sustainability Report and our 2021 Diversity, Equity and Inclusion Report located on our website, for more detailed information regarding our human capital programs and initiatives. Nothing on our website, including our Sustainability Report, Diversity, Equity and Inclusion Report or sections thereof, shall be deemed incorporated by reference into this Annual Report.

INTERNET INFORMATION

Our website address is www.eversource.com.  We make available through our website a link to the SEC's EDGAR website (http://www.sec.gov/edgar/searchedgar/companysearch.html), at which site Eversource's, CL&P's, NSTAR Electric's and PSNH's combined Annual Reports on Form 10-K, combined Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and any amendments to those reports may be reviewed. Information contained on the Company's website or that can be accessed through the website is not incorporated into and does not constitute a part of this Annual Report on Form 10-K.  Printed copies of these reports may be obtained free of charge by writing to our Investor Relations Department at Eversource Energy, 107 Selden Street, Berlin, CT 06037.  

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Item 1A. Risk Factors

In addition to the matters set forth under "Safe Harbor Statement Under the Private Securities Litigation Reform Act of 1995" included immediately prior to Item 1, Business, above, we are subject to a variety of material risks. Our susceptibility to certain risks, including those discussed in detail below, could exacerbate other risks. These risk factors should be considered carefully in evaluating our risk profile. There may be additional risks and uncertainties (either currently unknown or not currently believed to be material) that could adversely affect our financial position, results of operations, and cash flows.

Cybersecurity and Data Privacy Risks:

Cyberattacks, including acts of war or terrorism, targeted directly on or indirectly affecting our systems or the systems of third parties on which we rely, could severely impair operations, negatively impact our business, lead to the disclosure of confidential information and adversely affect our reputation.

Cyberattacks that seek to exploit potential vulnerabilities in the utility industry and seek to disrupt electric, natural gas and water transmission and distribution systems are increasing in sophistication, magnitude and frequency. In the first quarter of 2022, the federal government notified the owners and operators of critical infrastructure that the conflict between Russia and Ukraine has increased the likelihood of a cyberattack on such systems. A successful cyberattack on the information technology systems that control our transmission, distribution, natural gas and water systems or other assets could impair or prevent us from managing these systems and facilities, operating our systems effectively, or properly managing our data, networks and programs. The breach of certain information technology systems could adversely affect our ability to correctly record, process and report financial information. A major cyber incident could result in significant expenses to investigate and to repair system damage or security breaches and could lead to litigation, fines, other remedial action, heightened regulatory scrutiny and damage to our reputation.

We have instituted safeguards to protect our information technology systems and assets. We deploy substantial technologies to system and application security, encryption and other measures to protect our computer systems and infrastructure from unauthorized access or misuse. Specifically, regarding vulnerabilities, we patch systems where patches are available to deploy, and have technologies that detect exploits of vulnerabilities and proactively block the exploit when it happens. We also interface with numerous external entities to improve our cybersecurity situational awareness. The FERC, through the North American Electric Reliability Corporation (NERC), requires certain safeguards to be implemented to deter cyberattacks. These safeguards may not always be effective due to the evolving nature of cyberattacks. We maintain cyber insurance to cover damages and defense costs related to breaches of networks or operational technology, but it may be insufficient in limits and coverage exclusions to cover all losses.

Any such cyberattacks could result in loss of service to customers and a significant decrease in revenues, which could have a material adverse impact on our financial position, results of operations and cash flows.

The unauthorized access to, and the misappropriation of, confidential and proprietary customer, employee, financial or system operating information could adversely affect our business operations and adversely impact our reputation.

In the regular course of business, we, and our third-party suppliers, rely on information technology to maintain sensitive customer, employee, financial and system operating information. We are required by various federal and state laws to safeguard this information. Cyber intrusions, security breaches, theft or loss of this information by cybercrime or otherwise could lead to the release of critical operating information or confidential customer or employee information, which could adversely affect our business operations or adversely impact our reputation, and could result in significant costs, fines and litigation. We employ system controls to prevent the dissemination of certain confidential information and periodically train employees on phishing risks. We maintain cyber insurance to cover damages and defense costs arising from unauthorized disclosure of, or failure to protect, private information, as well as costs for notification to, or for credit monitoring of, customers, employees and other persons in the event of a breach of private information. This insurance covers amounts paid to address a network attack or the disclosure of personal information, and costs of a qualified forensics firm to determine the cause, source and extent of a network attack or to investigate, examine and analyze our network to find the cause, source and extent of a data breach, but it may be insufficient to cover all losses. While we have implemented measures designed to prevent network attacks and mitigate their effects should they occur, these measures may not be effective due to the continually evolving nature of efforts to access confidential information.

Business and Operational Risks:

Strategic development opportunities associated with offshore wind or investment opportunities in electric transmission, distributed generation, or clean-energy opportunities may not be successful, and projects may not commence operation as scheduled or within budget, or be completed, which could have a material adverse effect on our business prospects.

We are pursuing broader strategic development investment opportunities that will benefit the Northeast region related to the development, construction and operation of offshore wind electric generation facilities, and investment opportunities in electric transmission facilities, distributed generation and other clean-energy infrastructure. The states in which we provide service have implemented selection procedures for such new facilities that require the review of competing projects and permit the selection of only those projects that are expected to provide the greatest benefit to customers. Accordingly, our projects may not be selected for construction. The development and construction of projects selected for construction involves numerous significant risks including scheduling delays, increased costs, tax strategies and changes to federal tax laws, federal, state and local permitting and regulatory approval processes, specifically BOEM’s approval processes, new legislation impacting the industry, future legislative or regulatory actions that could result in these projects not being probable of entering the construction phase, economic events or factors, environmental and community concerns, design and siting issues, difficulties in obtaining required rights of way, competition

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from incumbent utilities and other entities, actions of our strategic partners, and capacity factors once projects are placed in operation. Also, supply constraints in New England are leading to historic increases in fuel and commodity costs which may impact our ability to accomplish our strategic objectives.

Our offshore wind partnership’s ability to generate returns from its offshore wind projects will depend on meeting construction schedules, controlling project costs, maintaining continuing interconnection arrangements, power purchase agreements, or other market mechanisms as well as interconnecting utility and Regional Transmission Organizations rules, policies, procedures and FERC tariffs that permit future offshore wind project operations. Additionally, scheduling or permitting delays in offshore wind projects, increases in cost estimates, higher interest rates, changes to tax laws impacting the offshore wind partnership’s ability to monetize tax attributes, or the cancellation of any projects, as well as the other risk factors described above, could result in lower investment returns and, if significant enough, an impairment of the carrying value of our investment. Such an impairment could have a material adverse effect on our financial position, results of operations, and cash flows, or our future growth opportunities may not be realized as anticipated.

We assess our investments (recorded as either long-lived assets or equity method investments) for impairment whenever events or circumstances indicate that the carrying amount of the investment may not be recoverable. To the extent the value of the investment becomes impaired, the impairment charge could have a material adverse effect on our financial condition and results of operations.

We rely on third-party suppliers for equipment, materials, and services and we outsource certain business functions to third-party suppliers and service providers, and substandard performance or inability to fulfill obligations by those third parties could harm our business, reputation and results of operations.

We outsource certain services to third parties in areas including information technology, transaction processing, human resources, payroll and payroll processing and certain operational areas. Outsourcing of services to third parties could expose us to substandard quality of service delivery or substandard deliverables, which may result in missed deadlines or other timeliness issues, non-compliance (including with applicable legal requirements and industry standards) or reputational harm, which could negatively impact our results of operations. Our contractual arrangements with these contractors typically include performance standards, progress payments, insurance requirements and security for performance. We also continue to pursue enhancements to standardize our systems and processes. The global supply chain of goods and services is currently being negatively impacted by several factors, including the geopolitical climate, labor shortages, domestic and international shipping constraints, increased demand, and shortages of raw materials. As a result, we are seeing delivery delays of certain goods. Additionally, the prices for equipment, materials, and contractor services have increased, and may continue to increase. If significant difficulties in the global supply chain cycle or inflationary impacts were to continue or worsen, they could adversely affect our results of operations, or adversely affect our ability to work with regulators, unions, customers or employees.

Our transmission and distribution systems may not operate as expected, and could require unplanned expenditures, which could adversely affect our financial position, results of operations and cash flows.

Our ability to properly operate our transmission and distribution systems is critical to the financial performance of our business. Our transmission and distribution businesses face several operational risks, including the breakdown, failure of, or damage to operating equipment, information technology systems, or processes, especially due to age; labor disputes; disruptions in the delivery of electricity, natural gas and water; increased capital expenditure requirements, including those due to environmental regulation; catastrophic events such as fires, explosions, a solar event, an electromagnetic event, or other similar occurrences; increasingly severe weather conditions due to climate change beyond equipment and plant design capacity; human error; global supply chain disruptions; and potential claims for property damage or personal injuries beyond the scope of our insurance coverage. Many of our transmission projects are expected to alleviate identified reliability issues and reduce customers' costs. However, if the in-service date for one or more of these projects is delayed due to economic events or factors, or regulatory or other delays, the risk of failures in the electric transmission system may increase. We also implement new information technology systems from time to time, which may disrupt operations. Any failure of our transmission and distribution systems to operate as planned may result in increased capital costs, reduced earnings or unplanned increases in operations and maintenance costs. The inability to recover a significant amount of such costs could have an adverse effect on our financial position, results of operations and cash flows.

New technology and alternative energy sources could adversely affect our operations and financial results.

Advances in technology that reduce the costs of alternative methods of producing electric energy to a level that is competitive with that of current electric production methods, could result in loss of market share and customers, and may require us to make significant expenditures to remain competitive. These changes in technology, including micro-grids and advances in energy or battery storage, could also alter the channels through which electric customers buy or utilize energy, which could reduce our revenues or increase our expenses. Economic downturns or periods of high energy supply costs typically can lead to the development of legislative and regulatory policy designed to promote reductions in energy consumption and increased energy efficiency and self-generation by customers. Additionally, in response to risks posed by climate change, we may need to make investments in our system including upgrades or retrofits to meet enhanced design criteria, which can incur additional costs over conventional solutions.

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The loss of key personnel, the inability to hire and retain qualified employees, or the failure to maintain a positive relationship with our workforce could have an adverse effect on our business, financial position and results of operations.

Our operations depend on the continued efforts of our employees. Retaining key employees and maintaining the ability to attract new employees are important to both our operational and financial performance. We cannot guarantee that any member of our management or any key employee at the Eversource parent or subsidiary level will continue to serve in any capacity for any particular period of time. Our workforce in our subsidiaries includes many workers with highly specialized skills maintaining and servicing the electric, natural gas and water infrastructure that cannot be quickly replaced due to the technically complex work they perform. We have developed strategic workforce plans to identify key functions and proactively implement plans to assure a ready and qualified workforce, but we cannot predict the impact of these plans on our ability to hire and retain key employees. Labor disputes, work stoppages or an inability to negotiate future collective bargaining agreements on commercially reasonable terms, as well as the increased competition for talent or the intentional misconduct of employees or contractors, may also have an adverse effect on our business, financial position and results of operations.

Risks Related to the Environment and Catastrophic Events:

The effects of climate change, including severe storms, could cause significant damage to any of our facilities requiring extensive expenditures, the recovery for which is subject to approval by regulators.

Climate change creates physical and financial risks to our operations. Physical risks from climate change may include an increase in sea levels and changes in weather conditions, such as changes in precipitation, extreme heat and extreme weather events. Customers’ energy and water needs vary with weather conditions, primarily temperature and humidity. For residential customers, heating and cooling represent their largest energy use. For water customers, conservation measures imposed by the communities we serve could impact water usage. To the extent weather conditions are affected by climate change, customers’ energy and water usage could increase or decrease depending on the duration and magnitude of the changes.

Severe weather, such as ice and snow storms, tornadoes, micro-bursts, hurricanes, floods, droughts, and other natural disasters, may cause outages and property damage, which may require us to incur additional costs that may not be recoverable from customers. The cost of repairing damage to our operating subsidiaries' facilities and the potential disruption of their operations due to storms, natural disasters or other catastrophic events could be substantial, particularly as regulators and customers demand better and quicker response times to outages. If, upon review, any of our state regulatory authorities finds that our actions were imprudent, some of those restoration costs may not be recoverable from customers, and could result in penalties or fines. The inability to recover a significant amount of such costs could have an adverse effect on our financial position, results of operations and cash flows. We maintain property insurance, but it may be insufficient in limits and coverage exclusions to cover all losses. Additionally, these types of weather events risk interruption of the supply chain and could disrupt the delivery of goods and services required for our operations.

Transitional impacts related to climate change may have an adverse effect on our business and results of operations due to costs associated with new technologies, evolving customer expectations and changing workforce needs.

Initiatives to mitigate the impacts of climate change, support a transition to cleaner energy, and reduce emissions, may have a material adverse financial impact to our business. These impacts include the costs associated with the development and implementation of new technologies to maintain system reliability and resiliency and lower emissions, including grid modernization and energy storage. An increase in such costs, unless promptly recovered, could have an adverse impact on our financial position, results of operations and cash flows. There may also be financial and reputational risks if we fail to meet evolving customer expectations, including enabling the integration of residential renewables and providing low carbon solutions, such as electric vehicle infrastructure and energy efficiency services. Additionally, actions to mitigate climate change may result in a transition in our workforce that must adapt to meet the need for new job skills. Associated costs include training programs for existing employees and workforce development as we transition to new technologies and clean energy solutions.

Adequacy of water supplies and contamination of our water supplies, the failure of dams on reservoirs providing water to our customers, or requirements to repair, upgrade or dismantle any of these dams, may disrupt our ability to distribute water to our customers and result in substantial additional costs, which could adversely affect our financial position, results of operations and cash flows.

Our water business faces an inherent strategic risk related to adequacy of supply (i.e., water scarcity). Water scarcity risk is heightened by multiple factors. We expect that climate change will cause both an increase in demand due to increasing temperatures and a potential for a decrease of available supply due to shifting rainfall and recharge patterns. Regulatory constraints also present challenges to permit new sources of supply in the region. In Connecticut, where the vast majority of our dams are located, impounded waterways are required to release minimum downstream flow. New regulations are being phased into effect over the next one to five years that will increase the volume of downstream releases required across our Connecticut service territory, depleting the volume of supply in storage that is used to meet customer demands. This combination of factors may cause an increased likelihood of drought emergencies and water use restrictions that could adversely affect our ability to provide water to our customers, and reputational/brand damage that could negatively impact our water business.

Our water supplies, including water provided to our customers, are also subject to possible contamination from naturally occurring compounds or man-made substances. Our water systems include impounding dams and reservoirs of various sizes. Although we believe our dams are structurally sound and well-maintained, significant damage to these facilities, or a significant decrease in the water in our reservoirs, could adversely affect our ability to provide water to our customers until the facilities and a sufficient amount of water in our reservoirs can be restored. A failure of a dam could result in personal injuries and downstream property damage for which we may be liable. The failure of a dam would also adversely affect our ability to supply water in sufficient quantities to our customers. Any losses or liabilities incurred due to a failure of one of our

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dams may not be recoverable in rates and may have a material adverse effect on our financial position, results of operations and cash flows. We maintain liability insurance, but it may be insufficient in limits and coverage exclusions to cover all losses.

Physical attacks, including acts of war or terrorism, both threatened and actual, could adversely affect our ability to operate our systems and could adversely affect our financial results and liquidity.

Physical attacks, including acts of war or terrorism, both threatened and actual, that damage our transmission and distribution systems or other assets could negatively impact our ability to transmit or distribute energy, water, natural gas, or operate our systems efficiently or at all. Because our electric transmission systems are part of an interconnected regional grid, we face the risk of widespread blackouts due to grid disturbances or disruptions on a neighboring interconnected system. Similarly, our natural gas distribution system is connected to transmission pipelines not owned by Eversource. If there was an attack on the transmission pipelines, it could impact our ability to deliver natural gas. If our assets were physically damaged and were not recovered in a timely manner, it could result in a loss of service to customers, a significant decrease in revenues, significant expense to repair system damage, costs associated with governmental actions in response to such attacks, and liability claims, all of which could have a material adverse impact on our financial position, results of operations and cash flows. We maintain property and liability insurance, but it may be insufficient in limits and coverage exclusions to cover all losses. In addition, physical attacks against third-party providers could have a similar effect on the operation of our systems.

Regulatory, Legislative and Compliance Risks:

The actions of regulators and legislators could result in outcomes that may adversely affect our earnings and liquidity.

The rates that our electric, natural gas and water companies charge their customers are determined by their state regulatory commissions and by the FERC. These commissions also regulate the companies' accounting, operations, the issuance of certain securities and certain other matters. The FERC also regulates the transmission of electric energy, the sale of electric energy at wholesale, accounting, issuance of certain securities and certain other matters, including reliability standards through the NERC. The regulatory process may be adversely affected by the political, regulatory and economic environment in the states in which we operate.

Under state and federal law, our electric, natural gas and water companies are entitled to charge rates that are sufficient to allow them an opportunity to recover their prudently incurred operating and capital costs and a reasonable rate of return on invested capital, to attract needed capital and maintain their financial integrity, while also protecting relevant public interests. Our electric, natural gas and water companies are required to engage in regulatory approval proceedings as a part of the process of establishing the terms and rates for their respective services. Each of these companies prepares and submits periodic rate filings with their respective regulatory commissions for review and approval, which allows for various entities to challenge our current or future rates, structures or mechanisms and could alter or limit the rates we are allowed to charge our customers. These proceedings typically involve multiple parties, including governmental bodies and officials, consumer advocacy groups, and various consumers of energy, who have differing concerns. Any change in rates, including changes in allowed rate of return, are subject to regulatory approval proceedings that can be contentious, lengthy, and subject to appeal. This may lead to uncertainty as to the ultimate result of those proceedings. Established rates are also subject to subsequent prudency reviews by state regulators, whereby various portions of rates could be adjusted, subject to refund or disallowed, including cost recovery mechanisms. The ultimate outcome and timing of regulatory rate proceedings or challenges to certain provisions in our distribution tariffs could have a significant effect on our ability to recover costs or earn an adequate return. Adverse decisions in our proceedings could adversely affect our financial position, results of operations and cash flows.

The federal, state and local political and economic environment has had, and may in the future have, an adverse effect on regulatory decisions with negative consequences for us. These decisions may require us to cancel, reduce, or delay planned development activities or other planned capital expenditures or investments or otherwise incur costs that we may not be able to recover through rates. There can be no assurance that regulators will approve the recovery of all costs incurred by our electric, natural gas and water companies, including costs for construction, operation and maintenance, and storm restoration. The inability to recover a significant amount of operating costs could have an adverse effect on our financial position, results of operations, and cash flows. Changes to rates may occur at times different from when costs are incurred. Additionally, catastrophic events at other utilities could result in our regulators and legislators imposing additional requirements that may lead to additional costs for the companies. In addition to the risk of disallowance of incurred costs, regulators may also impose downward adjustments in a company’s allowed ROE as well as assess penalties and fines. These actions would have an adverse effect on our financial position, results of operations and cash flows.

The FERC has jurisdiction over our transmission costs recovery and our allowed ROEs. If FERC changes their methodologies on developing ROEs there could be a negative impact on our results of operations and cash flows. Additionally, certain outside parties have filed four complaints against all electric companies under the jurisdiction of ISO-NE alleging that our allowed ROEs are unjust and unreasonable. An adverse decision in any of these four complaints could adversely affect our financial position, results of operations and cash flows.

FERC's policy has encouraged competition for transmission projects, even within existing service territories of electric companies. Implementation of FERC's goals, including within our service territories, may expose us to competition for construction of transmission projects, additional regulatory considerations, and potential delay with respect to future transmission projects, which may adversely affect our results of operations and lower rate base growth.

Changes in tax laws, including the Inflation Reduction Act (IRA) of 2022, as well as the potential tax effects of business decisions could negatively impact our business, results of operations (including our expected project returns from our planned offshore wind facilities), financial condition and cash flows.

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We are exposed to significant reputational risks, which make us vulnerable to increased regulatory oversight or other sanctions.

Because utility companies, including our electric, natural gas and water utility subsidiaries, have large customer bases, they are subject to adverse publicity focused on the reliability of their distribution services and the speed with which they are able to respond to electric outages, natural gas leaks and similar interruptions caused by storm damage or other unanticipated events, including those related to climate change. Adverse publicity of this nature could harm our reputation and the reputation of our subsidiaries; may make state legislatures, utility commissions and other regulatory authorities less likely to view us in a favorable light; and may cause us to be subject to less favorable legislative and regulatory outcomes, legal claims or increased regulatory oversight. Unfavorable regulatory outcomes can include more stringent laws and regulations governing our operations, such as reliability and customer service quality standards or vegetation management requirements, as well as fines, penalties or other sanctions or requirements. Further, we rely upon purchased power and purchased natural gas supply from third parties to meet customers’ energy requirements. Due to a variety of factors, including the inflationary economic environment, conflict in Russia and Ukraine, and increased customer energy demand, the cost of energy supply in New England has significantly increased. We also may be required to implement rolling blackouts by ISO-New England, the region’s independent grid operator if enough capacity is not available in the area to meet peak demand needs. The significant supply cost increases, as well as any failure to meet customer energy requirements, could negatively impact the satisfaction of our customers and our customers’ ability to pay their utility bill, which could have an adverse impact on our business, reputation, financial position, results of operations and cash flows.

Addressing any adverse publicity, regulatory scrutiny or enforcement or other legal proceedings is time consuming and expensive and, regardless of the factual basis for the assertions being made, can have a negative impact on the reputation of our business, on the morale and performance of our employees and on our relationships with respective regulators, customers and counterparties. We are unable to predict future legislative or regulatory changes, initiatives or interpretations, and there can be no assurance that we will be able to respond adequately or sufficiently quickly to such actions. The direct and indirect effects of negative publicity, and the demands of responding to and addressing it, may have a material adverse effect on our financial position, results of operations and cash flows.

Costs of compliance with environmental laws and regulations, including those related to climate change, may increase and have an adverse effect on our business and results of operations.

Our subsidiaries' operations are subject to extensive and increasing federal, state and local environmental statutes, rules and regulations that govern, among other things, water quality, water discharges, the management of hazardous material and solid waste, and air emissions. Compliance with these requirements requires us to incur significant costs relating to environmental permitting, monitoring, maintenance and upgrading of facilities, remediation, and reporting.

The costs of compliance with existing legal requirements or legal requirements not yet adopted may increase in the future. Although we have recorded liabilities for known environmental obligations, these costs can be difficult to estimate due to uncertainties about the extent of contamination, remediation alternatives, the remediation levels required by state and federal agencies, and the financial ability of other potentially responsible parties. An increase in such costs, unless promptly recovered, could have an adverse impact on our business and our financial position, results of operations and cash flows.

For further information, see Item 1, Business - Other Regulatory and Environmental Matters, included in this Annual Report on Form 10-K.

Financial, Economic, and Market Risks:

Limits on our access to, or increases in, the cost of capital may adversely impact our ability to execute our business plan.

We use short-term debt and the long-term capital markets as a significant source of liquidity and funding for capital requirements not obtained from our operating cash flow. If access to these sources of liquidity becomes constrained, our ability to implement our business strategy could be adversely affected. In addition, interest rates have increased and may continue to increase in the future. As a result, interest rates on future credit facilities and debt offerings could be higher than current levels, causing our financing costs to increase accordingly, which could adversely impact our financial position, results of operations and cash flows. A downgrade of our credit ratings or events beyond our control, such as a disruption in global capital and credit markets, could increase our cost of borrowing and cost of capital or restrict our ability to access the capital markets and negatively affect our ability to maintain and to expand our businesses.

Market performance or changes in assumptions may require us to make significant contributions to our pension and other postretirement benefit plans.

We provide a defined benefit pension plan and other postretirement benefits for a substantial number of employees, former employees and retirees. Our future pension obligations, costs and liabilities are highly dependent on a variety of factors, many of which are beyond our control. These factors include estimated investment returns, interest rates, discount rates, health care cost trends, benefit changes, salary increases and the demographics of plan participants. If our assumptions prove to be inaccurate, our future costs could increase significantly. In addition, various factors, including underperformance of plan investments and changes in law or regulation, could increase the amount of contributions required to fund our pension plan in the future. Additional large funding requirements, when combined with the financing requirements of our construction program, could impact the timing, amounts, and number of future financings and negatively affect our financial position, results of operations and cash flows.

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Our goodwill is recorded at an amount that, if impaired and written down, could adversely affect our future operating results and total capitalization.

We have a significant amount of goodwill on our consolidated balance sheet, which, as of December 31, 2022, totaled $4.52 billion. The carrying value of goodwill represents the fair value of an acquired business in excess of the fair value of identifiable assets and liabilities as of the acquisition date. We test our goodwill balances for impairment on an annual basis or whenever events occur, or circumstances change that would indicate a potential for impairment. A determination that goodwill is deemed to be impaired would result in a non-cash charge that could materially adversely affect our financial position, results of operations and total capitalization.

Our counterparties may not meet their obligations to us or may elect to exercise their termination rights, which could adversely affect our earnings.

We are exposed to the risk that counterparties to various arrangements that owe us money, have contracted to supply us with energy or other commodities or services, or that work with us as strategic partners, including on significant capital projects, will not be able to perform their obligations, will terminate such arrangements or, with respect to our credit facilities, fail to honor their commitments. Should any of these counterparties fail to perform their obligations or terminate such arrangements, we might be forced to replace the underlying commitment at higher market prices and/or have to delay the completion of, or cancel, a capital project. Should any lenders under our credit facilities fail to perform, the level of borrowing capacity under those arrangements could decrease. In any such events, our financial position, results of operations, or cash flows could be adversely affected.

As a holding company with no revenue-generating operations, Eversource parent's liquidity is dependent on dividends from its subsidiaries, its commercial paper program, and its ability to access the long-term debt and equity capital markets.

Eversource parent is a holding company and as such, has no revenue-generating operations of its own. Its ability to meet its debt service obligations and to pay dividends on its common shares is largely dependent on the ability of its subsidiaries to pay dividends to, or repay borrowings from, Eversource parent, and/or Eversource parent's ability to access its commercial paper program or the long-term debt and equity capital markets. Prior to funding Eversource parent, the subsidiary companies have financial obligations that must be satisfied, including among others, their operating expenses, debt service, preferred dividends of certain subsidiaries, and obligations to trade creditors. Should the subsidiary companies not be able to pay dividends or repay funds due to Eversource parent, or if Eversource parent cannot access its commercial paper programs or the long-term debt and equity capital markets, Eversource parent's ability to pay interest, dividends and its own debt obligations would be restricted.

Item 1B.    Unresolved Staff Comments

We do not have any unresolved SEC staff comments.

Item 2.    Properties

Transmission and Distribution System

As of December 31, 2022, Eversource and our electric operating subsidiaries owned the following:

	Electric Distribution	Electric Transmission
Eversource
Number of substations owned	474	73
Transformer capacity (in kVa)	44,614,960	19,129,000
Overhead lines (in circuit miles)	40,502	3,984
Underground lines (in circuit miles)	18,085	423
Capacity range of overhead transmission lines (in kV)	N/A	69 to 345
Capacity range of underground transmission lines (in kV)	N/A	69 to 345

	CL&P		NSTAR Electric		PSNH
	Distribution	Transmission	Distribution	Transmission	Distribution	Transmission
Number of substations owned	175	20	176	31	123	22
Transformer capacity (in kVa)	21,967,000	3,184,000	18,151,360	11,595,000	4,496,600	4,350,000
Overhead lines (in circuit miles)	16,717	1,678	11,489	1,252	12,296	1,054
Underground lines (in circuit miles)	6,839	143	9,167	277	2,079	3
Capacity range of overhead transmission lines (in kV)	N/A	69 to 345	N/A	69 to 345	N/A	115 to 345
Capacity range of underground transmission lines (in kV)	N/A	69 to 345	N/A	115 to 345	N/A	115

	Eversource	CL&P	NSTAR Electric	PSNH
Underground and overhead line transformers in service	680,739	293,512	217,089	170,138
Aggregate capacity (in kVa)	41,162,476	16,574,834	17,389,978	7,197,664

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Electric Generating Plants

As of December 31, 2022, NSTAR Electric owned the following solar power facilities:  

Type of Plant	Number of Sites	Year Installed	Capacity (kilowatts, dc)
Solar Fixed Tilt, Photovoltaic	22	2010 - 2019	70,000

CL&P and PSNH do not own any electric generating plants.

Natural Gas Distribution System

As of December 31, 2022, NSTAR Gas owned 22 active gate stations, 147 district regulator stations, and approximately 3,324 miles of natural gas main pipeline. Hopkinton, another subsidiary of Eversource, owns a satellite vaporization plant and above ground storage tanks in Acushnet, Massachusetts (0.5 Bcf of natural gas). In addition, Hopkinton owns a liquefaction and vaporization plant with above ground storage tanks in Hopkinton, Massachusetts (3.0 Bcf of natural gas). Combined, the two plants' tanks have an aggregate storage capacity equivalent to 3.5 Bcf of natural gas that is provided to NSTAR Gas under contract.

As of December 31, 2022, EGMA owned 14 active gate stations, 191 district regulator stations, and approximately 5,011 miles of natural gas main pipeline. Hopkinton, another subsidiary of Eversource, owns liquefaction and vaporization plants and above ground storage tanks at four locations throughout Massachusetts with an aggregate storage capacity equivalent to 1.8 Bcf of natural gas. In addition, Hopkinton owns three propane peak shaving plants at three locations throughout Massachusetts with an aggregate storage capacity equivalent to 0.1 Bcf. Combined, these seven plants have an aggregate storage capacity equivalent to 1.9 Bcf of natural gas that is provided to EGMA under contract.

As of December 31, 2022, Yankee Gas owned 28 active gate stations, 200 district regulator stations, and approximately 3,519 miles of natural gas main pipeline. Yankee Gas also owns a liquefaction and vaporization plant and above ground storage tank with a storage capacity equivalent of 1.2 Bcf of natural gas in Waterbury, Connecticut.

Natural Gas Transmission System

As of December 31, 2022, NSTAR Gas and EGMA owned 1.0 and 0.5 miles of intrastate transmission natural gas pipeline, respectively.

Water Distribution System

Aquarion’s properties consist of water transmission and distribution mains and associated valves, hydrants and service lines, water treatment plants, pumping facilities, wells, tanks, meters, dams, reservoirs, buildings, and other facilities and equipment used for the operation of our systems, including the collection, treatment, storage, and distribution of water.

As of December 31, 2022, Aquarion owned and operated sources of water supply with a combined yield of approximately 133 million gallons per day; 3,746 miles of transmission and distribution mains; 10 surface water treatment plants; 36 dams; and 116 wellfields.

Franchises

CL&P  Subject to the power of alteration, amendment or repeal by the General Assembly of Connecticut and subject to certain approvals, permits and consents of public authority and others prescribed by statute, CL&P has, subject to certain exceptions not deemed material, valid franchises free from burdensome restrictions to provide electric transmission and distribution services in the respective areas in which it is now supplying such service.

In addition to the right to provide electric transmission and distribution services as set forth above, the franchises of CL&P include, among others, limited rights and powers, as set forth under Connecticut law and the special acts of the General Assembly constituting its charter, to manufacture, generate, purchase and/or sell electricity at retail, including to provide Standard Service, Supplier of Last Resort service and backup service, to sell electricity at wholesale and to erect and maintain certain facilities on public highways and grounds, all subject to such consents and approvals of public authority and others as may be required by law. The franchises of CL&P include the power of eminent domain.  Connecticut law prohibits an electric distribution company from owning or operating generation assets.  However, under "An Act Concerning Electricity and Energy Efficiency," enacted in 2007, an electric distribution company, such as CL&P, is permitted to purchase an existing electric generating plant located in Connecticut that is offered for sale, subject to prior approval from PURA and a determination by PURA that such purchase is in the public interest.

NSTAR Electric  Through its charter, which is unlimited in time, NSTAR Electric has the right to engage in the business of delivering and selling electricity within its respective service territory, and has the power incidental thereto and is entitled to all the rights and privileges of and subject to the duties imposed upon electric companies under Massachusetts laws.  The locations in public ways for electric transmission and distribution lines are obtained from municipal and other state authorities who, in granting these locations, act as agents for the state. In some cases, the actions of these authorities are subject to appeal to the DPU.  The rights to these locations are not limited in time and are subject to the action of these authorities and the legislature.  Under Massachusetts law, no other entity may provide electric delivery service to retail customers within NSTAR Electric service territory without the written consent of NSTAR Electric.  This consent must be filed with the DPU and the municipality so affected. The franchises of NSTAR Electric include the power of eminent domain, obtained through application to the DPU.

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Massachusetts restructuring legislation defines service territories as those territories actually served on July 1, 1997 and following municipal boundaries to the extent possible.  The restructuring legislation further provides that until terminated by law or otherwise, distribution companies shall have the exclusive obligation to serve all retail customers within their service territories and no other person shall provide distribution service within such service territories without the written consent of such distribution companies.

PSNH  The NHPUC, pursuant to statutory requirements, has issued orders granting PSNH exclusive franchises to distribute electricity in the respective areas in which it is now supplying such service.

In addition to the right to distribute electricity as set forth above, the franchises of PSNH include, among others, rights and powers to manufacture, generate, purchase, and transmit electricity, to sell electricity at wholesale to other utility companies and municipalities and to erect and maintain certain facilities on certain public highways and grounds, all subject to such consents and approvals of public authority and others as may be required by law.  PSNH's status as a public utility gives it the ability to petition the NHPUC for the right to exercise eminent domain for distribution services and for transmission eligible for regional cost allocation.

PSNH is also subject to certain regulatory oversight by the Maine Public Utilities Commission and the Vermont Public Utility Commission.

NSTAR Gas Through its charter, which is unlimited in time, NSTAR Gas has the right to engage in the business of delivering and selling natural gas within its respective service territory, and has the power incidental thereto and is entitled to all the rights and privileges of and subject to the duties imposed upon natural gas companies under Massachusetts laws. The locations in public ways for natural gas distribution pipelines are obtained from municipal and other state authorities who, in granting these locations, act as agents for the state. In some cases, the actions of these authorities are subject to appeal to the DPU. The rights to these locations are not limited in time and are subject to the action of these authorities and the legislature. Under Massachusetts law, no other entity may provide natural gas delivery service to retail customers within the NSTAR Gas service territory without the written consent of NSTAR Gas. This consent must be filed with the DPU and the municipality so affected.

Eversource Gas Company of Massachusetts Eversource Gas Company of Massachusetts holds valid franchises to sell natural gas in the areas in which it supplies natural gas service. Generally, Eversource Gas Company of Massachusetts holds franchises to serve customers in areas designated by those franchises as well as in most other areas throughout Massachusetts so long as those areas are not occupied and served by another natural gas utility under a valid franchise of its own or are not subject to an exclusive franchise of another natural gas utility or by consent.

Yankee Gas  Yankee Gas holds valid franchises to sell natural gas in the areas in which Yankee Gas supplies natural gas service.  Generally, Yankee Gas holds franchises to serve customers in areas designated by those franchises as well as in most other areas throughout Connecticut so long as those areas are not occupied and served by another natural gas utility under a valid franchise of its own or are not subject to an exclusive franchise of another natural gas utility or by consent.  Yankee Gas' franchises are perpetual but remain subject to the power of alteration, amendment or repeal by the General Assembly of the State of Connecticut, the power of revocation by PURA and certain approvals, permits and consents of public authorities and others prescribed by statute.  Generally, Yankee Gas' franchises include, among other rights and powers, the right and power to manufacture, generate, purchase, transmit and distribute natural gas and to erect and maintain certain facilities on public highways and grounds, and the right of eminent domain, all subject to such consents and approvals of public authorities and others as may be required by law.

Aquarion Water Company of Connecticut and The Torrington Water Company AWC-CT and The Torrington Water Company derive their rights and franchises to operate from special acts of the Connecticut General Assembly and subject to certain approvals, permits and consents of public authority and others prescribed by statute and by its charter, they have, with minor exceptions, solid franchises free from burdensome restrictions and unlimited as to time, and are authorized to sell potable water in the towns (or parts thereof) in which water is now being supplied by AWC-CT and The Torrington Water Company.

In addition to the right to sell water as set forth above, the franchises of AWC-CT and The Torrington Water Company include rights and powers to erect and maintain certain facilities on public highways and grounds, all subject to such consents and approvals of public authority and others as may be required by law. Under the Connecticut General Statutes, AWC-CT and The Torrington Water Company may, upon payment of compensation, take and use such lands, springs, streams or ponds, or such rights or interests therein as the Connecticut Superior Court, upon application, may determine is necessary to enable AWC-CT and The Torrington Water Company to supply potable water for public or domestic use in its franchise areas.

Aquarion Water Company of Massachusetts Through its charters, which are unlimited in time, AWC-MA has the right to engage in the business of distributing and selling water within its service territories, and has the power incidental thereto and is entitled to all the rights and privileges of and subject to the duties imposed upon water companies under Massachusetts laws.  AWC-MA has the right to construct and maintain its mains and distribution pipes in and under any public ways and to take and hold water within its respective service territories. Subject to DPU regulation, AWC-MA has the right to establish and fix rates for use of the water distributed and to establish reasonable regulations regarding the same.  Certain of the towns within our service area have the right, at any time, to purchase the corporate property and all rights and privileges of AWC-MA according to pricing formulas and procedures specifically described in AWC-MA's respective charters and in compliance with Massachusetts law.

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Aquarion Water Company of New Hampshire and Abenaki Water Company The NHPUC, pursuant to statutory law, has issued orders granting and affirming AWC-NH’s and Abenaki’s exclusive franchises to own, operate, and manage plant and equipment and any part of the same, for the conveyance of water for the public located within its franchise territory. AWC-NH’s franchise territory encompasses the towns of Hampton, North Hampton, Rye and a limited portion of Stratham. Abenaki’s franchises extend to the boundaries of the water systems in the towns of Belmont, Bow, Carroll, and Gilford. Subject to NHPUC’s regulations, AWC-NH and Abenaki have the right to establish and fix rates for use of the water distributed and to establish reasonable regulations regarding the same.

In addition to the right to provide water supply, the franchise also allows AWC-NH and Abenaki to sell water at wholesale to other water utilities and municipalities and to construct plant and equipment and maintain such plant and equipment on certain public highways and grounds, all subject to such consents and approvals of public authority and others as may be required by law.

AWC-NH's and Abenaki’s status as regulated public utilities gives them the ability to petition the NHPUC for the right to exercise eminent domain for the establishment of plant and equipment. They can also petition the NHPUC for exemption from the operation of any local ordinance when certain utility structures are reasonably necessary for the convenience or welfare of the public and the local conditions, and, if the purpose of the structure relates to water supply withdrawal, the exemption is recommended by the New Hampshire Department of Environmental Services.

Item 3.    Legal Proceedings

We are involved in legal, tax and regulatory proceedings regarding matters arising in the ordinary course of business. For information regarding material lawsuits and proceedings, see Note 13, “Commitments and Contingencies,” of the Combined Notes to Financial Statements.

In addition, see Item 1, Business: "– Electric Distribution Segment," "– Electric Transmission Segment," "– Natural Gas Distribution Segment," and "– Water Distribution Segment" for information about various state and federal regulatory and rate proceedings, civil lawsuits related thereto, and information about proceedings relating to power, transmission and pricing issues; "– Nuclear Fuel Storage" for information related to nuclear waste; and "– Other Regulatory and Environmental Matters" for information about toxic substances and hazardous materials, climate change, and other matters. In addition, see Item 1A, Risk Factors, for general information about several significant risks.

Item 4.    Mine Safety Disclosures

Not applicable.

INFORMATION ABOUT OUR EXECUTIVE OFFICERS

The following sets forth the executive officers of Eversource Energy as of February 15, 2023. All of Eversource Energy’s officers serve terms of one year and until their successors elected and qualified.

Name	Age	Title
Joseph R. Nolan, Jr.	59	Chairman of the Board, President, Chief Executive Officer and a Trustee
John M. Moreira	61	Executive Vice President, Chief Financial Officer and Treasurer
Gregory B. Butler	65	Executive Vice President and General Counsel
Christine M. Carmody	60	Executive Vice President-Human Resources and Information Technology
Penelope M. Conner	59	Executive Vice President-Customer Experience and Energy Strategy
James W. Hunt, III	51	Executive Vice President-Corporate Relations and Sustainability and Secretary
Werner J. Schweiger	63	Executive Vice President and Chief Operating Officer
Jay S. Buth	53	Vice President, Controller and Chief Accounting Officer

Joseph R. Nolan, Jr. Mr. Nolan has served as Chairman of the Board of Eversource Energy since January 1, 2023, and has served as President and Chief Executive Officer and a Trustee of Eversource Energy since 2021. Previously, Mr. Nolan served as Executive Vice President-Strategy, Customer and Corporate Relations of Eversource Energy from February 5, 2020 until May 5, 2021, and as Executive Vice President-Customer and Corporate Relations of Eversource Energy from August 8, 2016 to February 5, 2020. Based on his experience as described, Mr. Nolan has the skills and qualifications necessary to serve as a Trustee of Eversource Energy.

John M. Moreira. Mr. Moreira has served as Executive Vice President, Chief Financial Officer and Treasurer of Eversource Energy since May 4, 2022. He previously served as Senior Vice President-Financial and Regulatory and Treasurer of Eversource Energy from September 12, 2018 until May 4, 2022.

Gregory B. Butler. Mr. Butler has served as General Counsel of Eversource Energy since May 1, 2001. He has served as Executive Vice President of Eversource Energy since August 8, 2016.

Christine M. Carmody. Ms. Carmody has served as Executive Vice President-Human Resources and Information Technology of Eversource Energy since August 8, 2016.

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Penelope M. Conner. Ms. Conner has served as Executive Vice President-Customer Experience and Energy Strategy of Eversource Energy since May 5, 2021. Previously, Ms. Conner served as Senior Vice President and Chief Customer Officer of Eversource Service from March 2, 2013 until May 5, 2021.

James W. Hunt, III. Mr. Hunt has served as Executive Vice President-Corporate Relations and Sustainability of Eversource Energy since May 5, 2021 and as Secretary of Eversource Energy since July 9, 2021. Previously Mr. Hunt served as Senior Vice President-Communications, External Affairs and Sustainability of Eversource Service from December 17, 2019 until May 5, 2021 and as Senior Vice President-Regulatory Affairs and Chief Communications Officer of Eversource Service from October 3, 2016 until December 17, 2019.

Werner J. Schweiger. Mr. Schweiger has served as Executive Vice President and Chief Operating Officer of Eversource Energy since September 2, 2014.

Jay S. Buth. Mr. Buth has served as Vice President, Controller and Chief Accounting Officer of Eversource Energy since April 10, 2012.

PART II

Item 5.    Market for the Registrants' Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

(a)    Market Information

Our common shares are listed on the New York Stock Exchange.  The ticker symbol is "ES."  There is no established public trading market for the common stock of CL&P, NSTAR Electric and PSNH.  All of the common stock of CL&P, NSTAR Electric and PSNH is held solely by Eversource.

(b)    Holders

As of January 31, 2023, there were 30,115 registered common shareholders of our company on record.  As of the same date, there were a total of 348,483,425 shares outstanding.

(c)     Dividends

Information with respect to dividends and dividend restrictions for Eversource, CL&P, NSTAR Electric and PSNH is contained in Item 8, Financial Statements and Supplementary Data, in the Combined Notes to Financial Statements, within this Annual Report on Form 10-K.   

(d)    Securities Authorized for Issuance Under Equity Compensation Plans

For information regarding securities authorized for issuance under equity compensation plans, see Item 12, Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters, included in this Annual Report on Form 10-K.

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(e)    Performance Graph

The performance graph below illustrates a five-year comparison of cumulative total returns based on an initial investment of $100 in 2017 in Eversource Energy common stock, as compared with the S&P 500 Stock Index and the EEI Index for the period 2017 through 2022, assuming all dividends are reinvested.

December 31,
	2017	2018	2019	2020	2021	2022
Eversource Energy	$100	$106	$143	$149	$162	$154
EEI Index	$100	$104	$130	$129	$151	$153
S&P 500	$100	$96	$126	$149	$192	$157

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

The following table discloses purchases of our common shares made by us or on our behalf for the periods shown below.  The common shares purchased consist of open market purchases made by the Company or an independent agent.  These share transactions related to matching contributions under the Eversource 401k Plan.

Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans and Programs (at month end)
October 1 - October 31, 2022	—	$	—	—	—
November 1 - November 30, 2022	—	—		—	—
December 1 - December 31, 2022	2,214	84.21		—	—
Total	2,214	$	84.21	—	—

Item 6.    Removed and Reserved

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Item 7.    Management's Discussion and Analysis of Financial Condition and Results of Operations

EVERSOURCE ENERGY AND SUBSIDIARIES

The following discussion and analysis should be read in conjunction with our consolidated financial statements and related combined notes included in this combined Annual Report on Form 10-K.  References in this combined Annual Report on Form 10-K to "Eversource," the "Company," "we," "us," and "our" refer to Eversource Energy and its consolidated subsidiaries.  All per-share amounts are reported on a diluted basis.  The consolidated financial statements of Eversource, NSTAR Electric and PSNH and the financial statements of CL&P are herein collectively referred to as the "financial statements."  Our discussion of fiscal year 2022 compared to fiscal year 2021 is included herein. Unless expressly stated otherwise, for discussion and analysis of fiscal year 2020 items and of fiscal year 2021 compared to fiscal year 2020, please refer to Item 7, Management's Discussion and Analysis of Financial Condition and Results of Operations, in our combined 2021 Annual Report on Form 10-K, which is incorporated herein by reference.

Refer to the Glossary of Terms included in this combined Annual Report on Form 10-K for abbreviations and acronyms used throughout this Management's Discussion and Analysis of Financial Condition and Results of Operations.  

The only common equity securities that are publicly traded are common shares of Eversource. The earnings and EPS of each business do not represent a direct legal interest in the assets and liabilities of such business, but rather represent a direct interest in our assets and liabilities as a whole. EPS by business is a financial measure that is not recognized under GAAP (non-GAAP) and is calculated by dividing the Net Income Attributable to Common Shareholders of each business by the weighted average diluted Eversource common shares outstanding for the period. Our earnings discussion also includes non-GAAP financial measures referencing our earnings and EPS excluding certain transaction and transition costs, and our 2021 earnings and EPS excluding charges at CL&P related to an October 2021 settlement agreement that included credits to customers and funding of various customer assistance initiatives and a 2021 storm performance penalty imposed on CL&P by PURA.

We use these non-GAAP financial measures to evaluate and provide details of earnings results by business and to more fully compare and explain our results without including these items. This information is among the primary indicators we use as a basis for evaluating performance and planning and forecasting of future periods. We believe the impacts of transaction and transition costs, the CL&P October 2021 settlement agreement, and the 2021 storm performance penalty imposed on CL&P by PURA, are not indicative of our ongoing costs and performance. We view these charges as not directly related to the ongoing operations of the business and therefore not an indicator of baseline operating performance. Due to the nature and significance of the effect of these items on Net Income Attributable to Common Shareholders and EPS, we believe that the non-GAAP presentation is a more meaningful representation of our financial performance and provides additional and useful information to readers of this report in analyzing historical and future performance of our business. These non-GAAP financial measures should not be considered as alternatives to reported Net Income Attributable to Common Shareholders or EPS determined in accordance with GAAP as indicators of operating performance.

Financial Condition and Business Analysis

Executive Summary

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 is organized into the electric distribution, electric transmission, natural gas distribution, and water distribution reportable segments.

The following items in this executive summary are explained in more detail in this combined Annual Report on Form 10-K:

Earnings Overview and Future Outlook:

•We earned $1.40 billion, or $4.05 per share, in 2022, compared with $1.22 billion, or $3.54 per share, in 2021.

•Our results include after-tax transaction and transition costs recorded at Eversource parent of $15.0 million, or $0.04 per share, in 2022, compared with $23.6 million, or $0.07 per share, in 2021. Our 2021 results also include after-tax charges of $86.1 million, or $0.25 per share, resulting from a PURA-approved CL&P settlement agreement and a PURA assessment as a result of CL&P’s preparation for, and response to, Tropical Storm Isaias in August 2020, which were recorded within the electric distribution segment. Excluding these costs, our non-GAAP earnings were $1.42 billion, or $4.09 per share, in 2022, compared with $1.33 billion, or $3.86 per share, in 2021.

•We project that we will earn within a 2023 non-GAAP earning guidance range of between $4.25 per share and $4.43 per share, which excludes the potential impact of the strategic review of our offshore wind investment portfolio. We also project that our long-term EPS growth rate through 2027 from our regulated utility businesses will be in the upper half of a 5 to 7 percent range.

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Liquidity:

•Cash flows provided by operating activities totaled $2.40 billion in 2022, compared with $1.96 billion in 2021.  Investments in property, plant and equipment totaled $3.44 billion in 2022 and $3.18 billion in 2021.  

•Cash and Cash Equivalents totaled $374.6 million as of December 31, 2022, compared with $66.8 million as of December 31, 2021.  Our available borrowing capacity under our commercial paper programs totaled $1.21 billion as of December 31, 2022.

•In 2022, we issued $4.05 billion of new long-term debt and we repaid $1.18 billion of long-term debt.

•In 2022, we issued 2,165,671 common shares, which resulted in proceeds of $197.1 million, net of issuance costs.

•In 2022, we paid dividends totaling $2.55 per common share, compared with dividends of $2.41 per common share in 2021. Our quarterly common share dividend payment was $0.6375 per share in 2022, as compared to $0.6025 per share in 2021.  On February 1, 2023, our Board of Trustees approved a common share dividend payment of $0.675 per share, payable on March 31, 2023 to shareholders of record as of March 2, 2023.  

•We project to make capital expenditures of $21.52 billion from 2023 through 2027, of which we expect $8.86 billion to be in our electric distribution segment, $5.25 billion to be in our natural gas distribution segment, $5.29 billion to be in our electric transmission segment, and $1.02 billion to be in our water distribution segment.  We also project to invest $1.10 billion in information technology and facilities upgrades and enhancements. Additionally, we currently expect to make investments in our offshore wind business between $1.9 billion and $2.1 billion in 2023 and expect to make investments for our three projects in total between $1.6 billion and $1.9 billion from 2024 through 2026. These estimates assume that the three projects are completed and are in-service by the end of 2025, as planned. These projected investments could be impacted by the strategic review of our offshore wind investment.

Strategic and Regulatory Transactions and Developments:

•On May 4, 2022, we announced that we had initiated a strategic review of our offshore wind investment portfolio. As part of that review, we are exploring strategic alternatives that could result in a potential sale of all, or part, of our 50 percent interest in our offshore wind partnership with Ørsted. We continue to work with interested parties through this ongoing process and expect to complete this review in the second quarter of 2023.

•On November 30, 2022, the DPU issued its decision in the NSTAR Electric distribution rate case and approved a base distribution rate increase of $64 million effective January 1, 2023. The DPU approved a renewal of the performance-based ratemaking (PBR) plan originally authorized in its previous rate case for a five-year term, with a corresponding stay out provision. The PBR plan term has the possibility of a five-year extension. The PBR mechanism allows for an annual adjustment to base distribution rates for inflation and exogenous events. The DPU also allowed for adjustments to the PBR mechanism for the recovery of future capital additions based on a historical five-year average of total capital additions, beginning with the January 1, 2024 PBR adjustment. The decision allows an authorized regulatory ROE of 9.80 percent on a capital structure including 53.2 percent equity.

Earnings Overview

Consolidated:  Below is a summary of our earnings by business, which also reconciles the non-GAAP financial measures of consolidated non-GAAP earnings and EPS, as well as EPS by business, to the most directly comparable GAAP measures of consolidated Net Income Attributable to Common Shareholders and diluted EPS.

	For the Years Ended December 31,
	2022				2021				2020
(Millions of Dollars, Except Per Share Amounts)	Amount		Per Share		Amount		Per Share		Amount		Per Share
Net Income Attributable to Common Shareholders (GAAP)	$	1,404.9	$	4.05	$	1,220.5	$	3.54	$	1,205.2	$	3.55
Regulated Companies (Non-GAAP)	$	1,460.4	$	4.21	$	1,342.4	$	3.89	$	1,223.3	$	3.60
Eversource Parent and Other Companies (Non-GAAP)	(40.5)		(0.12)		(12.2)		(0.03)		14.0		0.04
Non-GAAP Earnings	$	1,419.9	$	4.09	$	1,330.2	$	3.86	$	1,237.3	$	3.64
CL&P Settlement Impacts (after-tax) (1)	—		—		(86.1)		(0.25)		—		—
Transaction and Transition Costs (after-tax) (2)	(15.0)		(0.04)		(23.6)		(0.07)		(32.1)		(0.09)
Net Income Attributable to Common Shareholders (GAAP)	$	1,404.9	$	4.05	$	1,220.5	$	3.54	$	1,205.2	$	3.55

(1)    The 2021 after-tax costs are associated with the October 1, 2021 CL&P settlement agreement approved by PURA on October 27, 2021, which included a pre-tax $65 million charge to earnings for customer credits provided to customers over a two-month billing period from December 1, 2021 to January 31, 2022 and a $10 million pre-tax charge to earnings to establish a fund that provided bill payment assistance to certain existing non-hardship and hardship customers carrying arrearages. The 2021 after-tax costs also include a charge recorded at CL&P as a result of PURA’s April 28, 2021 and July 14, 2021 decisions, which included a pre-tax $28.4 million penalty for storm performance results provided as credits to customer bills over a one-year period that began September 1, 2021 and a pre-tax $0.2 million fine to the State of Connecticut’s general fund. As a result of the October 1, 2021 settlement agreement, CL&P agreed to withdraw its pending appeals related to

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the storm performance penalty imposed in PURA’s April 28, 2021 and July 14, 2021 decisions. Management views these collective charges as not directly related to the ongoing operations of the business and therefore not an indicator of baseline operating performance.

(2) The after-tax costs are for the transition of systems as a result of our purchase of the assets of Columbia Gas of Massachusetts (CMA) on October 9, 2020 and integrating the CMA assets onto Eversource’s systems. The after-tax costs also include costs associated with our water business acquisitions and the strategic review of our offshore wind investment portfolio. We expect transaction costs in 2023 as a result of the wind strategic review.

Regulated Companies:  Our regulated companies comprise the electric distribution, electric transmission, natural gas distribution and water distribution segments. A summary of our segment earnings and EPS is as follows:

	For the Years Ended December 31,
	2022				2021				2020
(Millions of Dollars, Except Per Share Amounts)	Amount		Per Share		Amount		Per Share		Amount		Per Share
Net Income - Regulated Companies (GAAP)	$	1,460.4	$	4.21	$	1,256.3	$	3.64	$	1,221.8	$	3.60
Electric Distribution, excluding CL&P Settlement Impacts    (Non-GAAP)	$	592.8	$	1.71	$	556.2	$	1.61	$	544.0	$	1.60
Electric Transmission	596.6		1.72		544.6		1.58		502.5		1.48
Natural Gas Distribution, excluding Transaction-Related Costs   (Non-GAAP)	234.2		0.67		204.8		0.59		135.6		0.40
Water Distribution	36.8		0.11		36.8		0.11		41.2		0.12
Net Income - Regulated Companies (Non-GAAP)	$	1,460.4	$	4.21	$	1,342.4	$	3.89	$	1,223.3	$	3.60
CL&P Settlement Impacts (after-tax)	—		—		(86.1)		(0.25)		—		—
Transaction and Transition Costs (after-tax)	—		—		—		—		(1.5)		—
Net Income - Regulated Companies (GAAP)	$	1,460.4	$	4.21	$	1,256.3	$	3.64	$	1,221.8	$	3.60

Our electric distribution segment earnings increased $122.7 million in 2022, as compared to 2021, due primarily to the absence in 2022 of CL&P’s October 1, 2021 settlement agreement that resulted in a $75 million pre-tax charge to earnings and a $28.6 million pre-tax charge to earnings at CL&P for a 2021 storm performance penalty imposed by PURA as a result of CL&P’s preparation for, and response to, Tropical Storm Isaias. The after-tax impact of the CL&P settlement agreement and CL&P storm performance penalty imposed by PURA was $86.1 million, or $0.25 per share. Excluding those 2021 charges, electric distribution segment earnings increased $36.6 million due primarily to a base distribution rate increase at NSTAR Electric effective January 1, 2022, higher earnings from CL&P's capital tracking mechanism due to increased electric system improvements, lower pension plan expense in Connecticut and New Hampshire, and an increase in interest income primarily on regulatory deferrals. Those earnings increases were partially offset by higher operations and maintenance expense driven primarily by higher shared corporate costs resulting from the implementation of new information technology systems, higher storm costs, a $10 million pre-tax charge to earnings as a result of CL&P’s commitment to contribute to an energy assistance program as part of its 2022 rate relief plan, and higher insurance reserves. Earnings were also unfavorably impacted by higher depreciation expense, higher property and other tax expense, and higher interest expense.

Our electric transmission segment earnings increased $52.0 million in 2022, as compared to 2021, due primarily to a higher transmission rate base as a result of our continued investment in our transmission infrastructure, partially offset by a higher effective income tax rate and higher interest expense on short-term debt.

Our natural gas distribution segment earnings increased $29.4 million in 2022, as compared to 2021, due primarily to base distribution rate increases effective November 1, 2021 and November 1, 2022 at each of EGMA and NSTAR Gas, higher earnings from capital tracking mechanisms due to continued investments in natural gas infrastructure, and lower pension plan expense at Yankee Gas. Those earnings increases were partially offset by higher operations and maintenance expense, higher property tax expense, higher interest expense, and higher depreciation expense.

Our water distribution segment earnings were flat in 2022, as compared to 2021.

Eversource Parent and Other Companies:  Eversource parent and other companies’ losses increased $19.7 million in 2022, as compared to 2021, due primarily to higher interest expense and a higher effective tax rate, partially offset by higher unrealized gains associated with our equity method investment in a renewable energy fund and an after-tax decrease of $8.6 million in transition costs associated with EGMA integration and transaction costs in 2022, as compared to 2021.

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Liquidity

Sources and Uses of Cash: Eversource’s regulated business is capital intensive and requires considerable capital resources. Eversource’s regulated companies’ capital resources are provided by cash flows generated from operations, short-term borrowings, long-term debt issuances, capital contributions from Eversource parent, and existing cash, and are used to fund their liquidity and capital requirements. Eversource’s regulated companies typically maintain minimal cash balances and use short-term borrowings to meet their working capital needs and other cash requirements. Short-term borrowings are also used as a bridge to long-term debt financings. The levels of short-term borrowing may vary significantly over the course of the year due to the impact of fluctuations in cash flows from operations, dividends paid, capital contributions received and the timing of long-term debt financings.

Eversource, CL&P, NSTAR Electric and PSNH each uses its available capital resources to fund its respective construction expenditures, meet debt requirements, pay operating costs, including storm-related costs, pay dividends, and fund other corporate obligations, such as pension contributions. Eversource's regulated companies recover their electric, natural gas and water distribution construction expenditures as the related project costs are depreciated over the life of the assets. This impacts the timing of the revenue stream designed to fully recover the total investment plus a return on the equity and debt used to finance the investments. Eversource's regulated companies spend a significant amount of cash on capital improvements and construction projects that have a long-term return on investment and recovery period. In addition, Eversource uses its capital resources to fund investments in its offshore wind business, which are recognized as long-term assets. These factors have resulted in current liabilities exceeding current assets by $2.58 billion, $168.6 million, and $330.0 million at Eversource, CL&P, and PSNH, respectively, as of December 31, 2022.

We expect the future operating cash flows of Eversource, CL&P, NSTAR Electric and PSNH, along with our 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.

As of December 31, 2022, $2.01 billion of Eversource's long-term debt, including $1.20 billion at Eversource parent, $400.0 million at CL&P, $80.0 million at NSTAR Electric, and $325.0 million at PSNH, matures within the next 12 months. CL&P repaid this long-term debt at maturity in January 2023. Eversource, with its strong credit ratings, has several options available in the financial markets to repay or refinance these maturities with the issuance of new long-term debt. Eversource, CL&P, NSTAR Electric and PSNH will reduce their short-term borrowings with operating cash flows or with the issuance of new long-term debt, determined by considering capital requirements and maintenance of Eversource's credit rating and profile.  

Cash and Cash Equivalents totaled $374.6 million as of December 31, 2022, compared with $66.8 million as of December 31, 2021.

Short-Term Debt - Commercial Paper Programs and Credit Agreements: Eversource parent has a $2.00 billion commercial paper program allowing Eversource parent to issue commercial paper as a form of short-term debt. Eversource parent, CL&P, PSNH, NSTAR Gas, Yankee Gas, EGMA and Aquarion Water Company of Connecticut are parties to a five-year $2.00 billion revolving credit facility, which terminates on October 15, 2027. This revolving credit facility serves to backstop Eversource parent's $2.00 billion commercial paper program.

NSTAR Electric has a $650 million commercial paper program allowing NSTAR Electric to issue commercial paper as a form of short-term debt. NSTAR Electric is also a party to a five-year $650 million revolving credit facility, which terminates on October 15, 2027. This revolving credit facility serves to backstop NSTAR Electric's $650 million commercial paper program.

The amount of borrowings outstanding and available under the commercial paper programs were as follows:

	Borrowings Outstanding  as of December 31,				Available Borrowing Capacity as of December 31,				Weighted-Average Interest Rate as of December 31,
(Millions of Dollars)	2022		2021		2022		2021		2022		2021
Eversource Parent Commercial Paper Program	$	1,442.2	$	1,343.0	$	557.8	$	657.0	4.63	%	0.31	%
NSTAR Electric Commercial Paper Program	—		162.5		650.0		487.5		—	%	0.14	%

There were no borrowings outstanding on the revolving credit facilities as of December 31, 2022 or 2021.

CL&P and PSNH have uncommitted line of credit agreements totaling $450 million and $300 million, respectively, which will expire on May 12, 2023. There are no borrowings outstanding on either the CL&P or PSNH uncommitted line of credit agreements as of December 31, 2022.

Amounts outstanding under the commercial paper programs are included in Notes Payable and classified in current liabilities on the Eversource and NSTAR Electric balance sheets, as all borrowings are outstanding for no more than 364 days at one time.

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 December 31, 2022, there were intercompany loans from Eversource parent to PSNH of $173.3 million. As of December 31, 2021, there were intercompany loans from Eversource parent to PSNH of $110.6 million. Intercompany loans from Eversource parent are included in Notes Payable to Eversource Parent and classified in current liabilities on the respective subsidiary's balance sheets.

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Availability under Long-Term Debt Issuance Authorizations: On December 14, 2022, the NHPUC approved PSNH’s request for authorization to issue up to $600 million in long-term debt through December 31, 2023. On November 30, 2022, the PURA approved CL&P's request for authorization to issue up to $1.15 billion in long-term debt through December 31, 2024. On June 14, 2022, the DPU approved NSTAR Gas’ request for authorization to issue up to $325 million in long-term debt through December 31, 2024. The remaining Eversource operating companies, including NSTAR Electric, have utilized the long-term debt authorizations in place with the respective regulatory commissions.

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/ Repayment Information
CL&P 2023 Series A First Mortgage Bonds	5.25	%	$	500.0	January 2023	January 2053	Repaid 2013 Series A Bonds at maturity and short-term debt, and paid capital expenditures and working capital
CL&P 2013 Series A First Mortgage Bonds	2.50	%	(400.0)		January 2023	January 2023	Paid at maturity
NSTAR Electric 2022 Debentures	4.55	%	450.0		May 2022	June 2052	Repaid short-term debt, paid capital expenditures and working capital
NSTAR Electric 2022 Debentures	4.95	%	400.0		September 2022	September 2052	Refinanced investments in eligible green expenditures, which were previously financed using short-term debt from October 1, 2020 through June 30, 2022
NSTAR Electric 2012 Debentures	2.375	%	(400.0)		October 2022	October 2022	Paid at maturity
PSNH Series W First Mortgage Bonds	5.15	%	300.0		January 2023	January 2053	Repaid short-term debt, paid capital expenditures and working capital
Eversource Parent Series V Senior Notes	2.90	%	650.0		February 2022	March 2027	Repaid Series K Senior Notes at maturity and short-term debt
Eversource Parent Series W Senior Notes	3.375	%	650.0		February 2022	March 2032	Repaid Series K Senior Notes at maturity and short-term debt
Eversource Parent Series X Senior Notes	4.20	%	900.0		June 2022	June 2024	Repaid short-term debt and paid working capital
Eversource Parent Series Y Senior Notes	4.60	%	600.0		June 2022	July 2027	Repaid short-term debt and paid working capital
Eversource Parent Series K Senior Notes	2.75	%	(750.0)		March 2022	March 2022	Paid at maturity
Yankee Gas Series B First Mortgage Bonds	8.48	%	(20.0)		March 2022	March 2022	Paid at maturity
Yankee Gas Series U First Mortgage Bonds	4.31	%	100.0		September 2022	September 2032	Repaid short-term debt, paid capital expenditures and for general corporate purposes
EGMA Series C First Mortgage Bonds	4.70	%	100.0		June 2022	June 2052	Repaid short-term debt, paid capital expenditures and for general corporate purposes
NSTAR Gas Series V First Mortgage Bonds	4.40	%	125.0		July 2022	August 2032	Repaid short-term debt, paid capital expenditures and for general corporate purposes
Aquarion Water Company of New Hampshire General Mortgage Bonds	4.45	%	(5.0)		July 2022	July 2022	Paid at maturity
Aquarion Water Company of Connecticut Senior Notes	4.69	%	70.0		August 2022	September 2052	Repaid short-term debt

As a result of the CL&P and PSNH long-term debt issuances in January 2023, $400 million and $295.3 million, respectively, of current portion of long-term debt were reclassified as Long-Term Debt on CL&P’s and PSNH’s balance sheets as of December 31, 2022.

Rate Reduction Bonds: PSNH's RRB payments consist of principal and interest and are paid semi-annually. PSNH paid $43.2 million of RRB principal payments and $17.6 million of interest payments in 2022, and paid $43.2 million of RRB principal payments and $18.9 million of interest payments in 2021.

Common Share Issuances and 2022 Equity Distribution Agreement: On May 11, 2022, Eversource entered into an equity distribution agreement pursuant to which it may offer and sell up to $1.2 billion of its common shares from time to time through an “at-the-market” (ATM) equity offering program. Eversource may issue and sell its common shares through its sales agents during the term of this agreement. Shares may be offered in transactions on the New York Stock Exchange, in the over-the-counter market, through negotiated transactions or otherwise. Sales may be made at either market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. In 2022, Eversource issued 2,165,671 common shares, which resulted in proceeds of $197.1 million, net of issuance costs. Eversource used the net proceeds received for general corporate purposes.

Cash Flows:  Cash flows from operating activities primarily result from the transmission and distribution of electricity, and the distribution of natural gas and water. Cash flows provided by operating activities totaled $2.40 billion in 2022, compared with $1.96 billion in 2021. Changes in Eversource’s cash flows from operations were generally consistent with changes in its results of operations, after adjustment for non-cash items and as adjusted by changes in working capital in the normal course of business. Operating cash flows were favorably impacted by the timing of cash payments made on our accounts payable, an increase in regulatory over-recoveries driven by the timing of collections for the non-bypassable FMCC at CL&P and other regulatory tracking mechanisms, a decrease of $99.2 million in pension and PBOP contributions made in 2022, as compared to 2021, and a $43.7 million decrease in income tax payments made in 2022, as compared to 2021. The impact of regulatory collections are included in both Regulatory Over/Under Recoveries and Amortization on the statements of cash flows. These favorable impacts were partially

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offset by the timing of cash collections on our accounts receivable, $78.4 million of payments in 2022 related to withheld property taxes at our Massachusetts companies, primarily at NSTAR Electric, $72.0 million of customer credits distributed to CL&P’s customers in 2022 as a result of the October 2021 settlement agreement and the 2021 storm performance penalty for CL&P’s response to Tropical Storm Isaias, a $61.6 million increase in cost of removal expenditures, and an increase of $34.0 million in cash payments for storm costs at NSTAR Electric.

In 2022, we paid cash dividends of $860.0 million and issued non-cash dividends of $23.1 million in the form of treasury shares, totaling dividends of $883.1 million, or $2.55 per common share. In 2021, we paid cash dividends of $805.4 million and issued non-cash dividends of $22.9 million in the form of treasury shares, totaling dividends of $828.3 million, or $2.41 per common share. Our quarterly common share dividend payment was $0.6375 per share in 2022, as compared to $0.6025 per share in 2021.  On February 1, 2023, our Board of Trustees approved a common share dividend payment of $0.675 per share, payable on March 31, 2023 to shareholders of record as of March 2, 2023.  

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.

In 2022, CL&P, NSTAR Electric and PSNH paid $292.4 million, $287.6 million and $104.0 million, respectively, in common stock dividends to Eversource parent.  

Investments in Property, Plant and Equipment on the statements of cash flows 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.  In 2022, investments for Eversource, CL&P, NSTAR Electric, and PSNH were $3.44 billion, $876.7 million, $954.3 million and $485.6 million, respectively.  Capital expenditures were primarily for continuing projects to maintain and improve infrastructure and operations, including enhancing reliability to the transmission and distribution systems.

Contractual Obligations: For information regarding our cash requirements from contractual obligations and payment schedules, see Note 9, "Long-Term Debt," Note 10, "Rate Reduction Bonds and Variable Interest Entities," Note 11A, "Employee Benefits - Pension Benefits and Postretirement Benefits Other Than Pension," Note 13, "Commitments and Contingencies," and Note 14, "Leases," to the financial statements.

Estimated interest payments on existing long-term fixed-rate debt are calculated by multiplying the coupon rate on the debt by its scheduled notional amount outstanding for the period of measurement as of December 31, 2022 and are as follows:

(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Eversource	$	722.6	$	654.7	$	589.6	$	559.7	$	517.3	$	5,864.4	$	8,908.3
CL&P	154.7		149.7		138.6		135.6		127.6		1,657.2		2,363.4

Our commitments to make payments in addition to these contractual obligations include other liabilities reflected on our balance sheets, future funding of our offshore wind equity method investment, and guarantees of certain obligations primarily associated with our offshore wind investment. The future funding and guarantee obligations associated with our offshore wind investment could be impacted by the strategic review of our offshore wind investment.

For information regarding our projected capital expenditures over the next five years, see "Business Development and Capital Expenditures - Projected Capital Expenditures" and for projected investments in our offshore wind business, see Business Development and Capital Expenditures - Offshore Wind Business" included in this Management's Discussion and Analysis of Financial Condition and Results of Operations.

Credit Ratings:  A summary of our corporate credit ratings and outlooks by S&P, Moody's, and Fitch is as follows:

	S&P		Moody's		Fitch
	Current	Outlook	Current	Outlook	Current	Outlook
Eversource Parent	A-	Positive	Baa1	Negative	BBB+	Stable
CL&P	A	Positive	A3	Stable	A-	Stable
NSTAR Electric	A	Positive	A1	Negative	A	Stable
PSNH	A	Stable	A3	Stable	A-	Stable

A summary of the current credit ratings and outlooks by S&P, Moody's, and Fitch for senior unsecured debt of Eversource parent and NSTAR Electric, and senior secured debt of CL&P and PSNH is as follows:

	S&P		Moody's		Fitch
	Current	Outlook	Current	Outlook	Current	Outlook
Eversource Parent	BBB+	Positive	Baa1	Negative	BBB+	Stable
CL&P	A+	Positive	A1	Stable	A+	Stable
NSTAR Electric	A	Positive	A1	Negative	A+	Stable
PSNH	A+	Stable	A1	Stable	A+	Stable

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Impact of COVID-19

The financial impacts of COVID-19 as it relates to our businesses primarily relate to collectability of customer receivables and the outcome of future proceedings before our state regulatory commissions to recover our incremental uncollectible customer receivable costs associated with COVID-19.

As of December 31, 2022, our allowance for uncollectible customer receivable balance of $486.3 million, of which $284.4 million relates to hardship accounts that are specifically recovered in rates charged to customers, adequately reflected the collection risk and net realizable value for our receivables. As of December 31, 2022 and 2021, the total amount incurred as a result of COVID-19 included in the allowance for uncollectible accounts was $50.9 million and $55.3 million at Eversource, $16.0 million and $23.9 million at CL&P, and $4.1 million and $9.0 million at NSTAR Electric, respectively. At our Connecticut and Massachusetts utilities, the COVID-19 related uncollectible amounts were deferred either as incremental regulatory costs or deferred through existing regulatory tracking mechanisms that recover uncollectible energy supply costs, as management believes it is probable that these costs will ultimately be recovered from customers in future rates. No COVID-19 related uncollectible amounts were deferred at PSNH as a result of a July 2021 NHPUC order. Based on the status of our COVID-19 regulatory dockets, policies and practices in the jurisdictions in which we operate, we believe the state regulatory commissions in Connecticut and Massachusetts will allow us to recover our incremental uncollectible customer receivable costs associated with COVID-19.

Business Development and Capital Expenditures

Our consolidated capital expenditures, including amounts incurred but not paid, cost of removal, AFUDC, and the capitalized and deferred portions of pension and PBOP income/expense (all of which are non-cash factors), totaled $3.79 billion in 2022, $3.54 billion in 2021, and $3.06 billion in 2020.  These amounts included $266.5 million in 2022, $238.0 million in 2021, and $239.1 million in 2020 related to information technology and facilities upgrades and enhancements, primarily at Eversource Service and The Rocky River Realty Company.

Electric Transmission Business: Our consolidated electric transmission business capital expenditures increased by $91.7 million in 2022, as compared to 2021.  A summary of electric transmission capital expenditures by company is as follows:  

	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
CL&P	$	416.8	$	400.0	$	402.9
NSTAR Electric	438.4		480.3		366.8
PSNH	351.8		235.0		193.9
Total Electric Transmission Segment	$	1,207.0	$	1,115.3	$	963.6

Our transmission projects are designed to improve the reliability of the electric grid, meet customer demand for power and increases in electrification of municipal infrastructure, strengthen the electric grid's resilience against extreme weather and other safety and security threats, and enable integration of increasing amounts of clean power generation from renewable sources, such as solar, battery storage, and offshore wind. In Connecticut, Massachusetts and New Hampshire, our transmission projects include transmission line upgrades, the installation of new transmission interconnection facilities, substations and lines, and transmission substation enhancements.

Our transmission projects in Massachusetts include electric transmission upgrades in the greater Boston metropolitan area. Two of these upgrades, the Mystic-Woburn and the Wakefield-Woburn reliability projects, are under construction and are expected to be placed in service by the fourth quarter of 2023. Construction on the last remaining upgrade, the Sudbury-Hudson Reliability Project, commenced in the fourth quarter of 2022. We spent $71.9 million during 2022 and we expect to make additional capital expenditures of approximately $115 million on these remaining transmission upgrades. There are also several transmission projects underway in southeastern Massachusetts, including Cape Cod, required to reinforce the Southeastern Massachusetts transmission system and bring the system into compliance with applicable national and regional reliability standards. We spent $23.2 million during 2022 and we expect to make additional capital expenditures of approximately $110 million on these transmission upgrades.

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Distribution Business:  A summary of distribution capital expenditures is as follows:

	For the Years Ended December 31,
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		Total Electric		Natural Gas		Water		Total
2022
Basic Business	$	267.8	$	202.4	$	68.6	$	538.8	$	175.2	$	16.8	$	730.8
Aging Infrastructure	199.9		245.1		70.8		515.8		562.3		137.6		1,215.7
Load Growth and Other	90.7		177.0		31.3		299.0		66.4		0.9		366.3
Total Distribution	$	558.4	$	624.5	$	170.7	$	1,353.6	$	803.9	$	155.3	$	2,312.8
2021
Basic Business	$	256.2	$	179.9	$	56.0	$	492.1	$	206.1	$	16.5	$	714.7
Aging Infrastructure	178.0		219.1		67.7		464.8		509.6		127.1		1,101.5
Load Growth and Other	80.2		169.9		37.1		287.2		83.3		0.6		371.1
Total Distribution	$	514.4	$	568.9	$	160.8	$	1,244.1	$	799.0	$	144.2	$	2,187.3
2020
Basic Business	$	233.4	$	195.1	$	52.4	$	480.9	$	88.2	$	10.9	$	580.0
Aging Infrastructure	179.9		237.1		80.2		497.2		391.3		115.5		1,004.0
Load Growth and Other	77.8		112.2		21.3		211.3		65.6		0.8		277.7
Total Distribution	$	491.1	$	544.4	$	153.9	$	1,189.4	$	545.1	$	127.2	$	1,861.7

For the electric distribution business, basic business includes the purchase of meters, tools, vehicles, information technology, transformer replacements, equipment facilities, and the relocation of plant. Aging infrastructure relates to reliability and the replacement of overhead lines, plant substations, underground cable replacement, and equipment failures. Load growth and other includes requests for new business and capacity additions on distribution lines and substation additions and expansions.

For the natural gas distribution business, basic business addresses daily operational needs including meters, pipe relocations due to public works projects, vehicles, and tools. Aging infrastructure projects seek to improve the reliability of the system through enhancements related to cast iron and bare steel replacement of main and services, corrosion mediation, and station upgrades. Load growth and other reflects growth in existing service territories including new developments, installation of services, and expansion.

For the water distribution business, basic business addresses daily operational needs including periodic meter replacement, water main relocation, facility maintenance, and tools. Aging infrastructure relates to reliability and the replacement of water mains, regulators, storage tanks, pumping stations, wellfields, reservoirs, and treatment facilities. Load growth and other reflects growth in our service territory, including improvements of acquisitions, installation of new services, and interconnections of systems.

Projected Capital Expenditures:  A summary of the projected capital expenditures for the regulated companies' electric transmission and for the total electric distribution, natural gas distribution and water distribution for 2023 through 2027, including information technology and facilities upgrades and enhancements on behalf of the regulated companies, is as follows:

	Years
(Millions of Dollars)	2023		2024		2025		2026		2027		2023 - 2027 Total
CL&P Transmission	$	406	$	312	$	324	$	263	$	136	$	1,441
NSTAR Electric Transmission	461		527		436		575		748		2,747
PSNH Transmission	329		270		252		174		72		1,097
Total Electric Transmission	$	1,196	$	1,109	$	1,012	$	1,012	$	956	$	5,285
Electric Distribution	$	1,847	$	1,750	$	1,768	$	1,870	$	1,628	$	8,863
Natural Gas Distribution	1,035		1,038		1,146		1,115		918		5,252
Total Electric and Natural Gas Distribution	$	2,882	$	2,788	$	2,914	$	2,985	$	2,546	$	14,115
Water Distribution	$	170	$	194	$	203	$	218	$	235	$	1,020
Information Technology and All Other	$	215	$	213	$	244	$	219	$	208	$	1,099
Total	$	4,463	$	4,304	$	4,373	$	4,434	$	3,945	$	21,519

The projections do not include investments related to offshore wind projects.  Actual capital expenditures could vary from the projected amounts for the companies and years above.

Acquisition of The Torrington Water Company: On October 3, 2022, Aquarion acquired The Torrington Water Company (TWC) following the receipt of all required approvals. The acquisition was structured as a stock-for-stock exchange, and Eversource issued 925,264 treasury shares at closing for a purchase price of $72.1 million. TWC provides regulated water service to approximately 10,100 customers in Connecticut.

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Offshore Wind Business: Our offshore wind business includes a 50 percent ownership interest in North East Offshore, which holds PPAs and contracts for the Revolution Wind, South Fork Wind and Sunrise Wind projects, as well as an undeveloped offshore lease area. Our offshore wind projects are being developed and constructed through a joint and equal partnership with Ørsted.

The offshore leases include a 257 square-mile ocean lease off the coasts of Massachusetts and Rhode Island and a separate, adjacent 300-square-mile ocean lease located approximately 25 miles south of the coast of Massachusetts. In aggregate, these ocean lease sites jointly-owned by Eversource and Ørsted could eventually develop at least 4,000 MW of clean, renewable offshore wind energy.

As of December 31, 2022 and 2021, Eversource's total equity investment balance in its offshore wind business was $1.95 billion and $1.21 billion, respectively. This equity investment includes capital expenditures for the three projects, as well as capitalized costs related to future development, acquisition costs of offshore lease areas, and capitalized interest.

Strategic Review of Offshore Wind Investments: On May 4, 2022, we announced that we had initiated a strategic review of our offshore wind investment portfolio. As part of that review, we are exploring strategic alternatives that could result in a potential sale of all, or part, of our 50 percent interest in our offshore wind partnership with Ørsted. In late July, we started preliminary and targeted outreach to interested parties. We continue to work with interested parties through this ongoing process and expect to complete this review in the second quarter of 2023. If the recommended path forward following the strategic review is a sale of all, or part, of our interest in the partnership, we expect potential proceeds from such transaction would likely be used to support our regulated investments in strengthening, modernizing and decarbonizing our regulated energy and water delivery systems. We currently believe that the fair market value of our offshore wind investment is greater than the carrying value; however, there could be changes in market conditions that would impact our ability to sell this investment or realize a value in excess of our carrying value. As the strategic review proceeds, we remain committed to continue providing oversight of the siting and construction of onshore elements of our South Fork Wind, Revolution Wind and Sunrise Wind offshore wind projects.

Contracts, Permitting and Construction of Offshore Wind Projects: The following table provides a summary of the Eversource and Ørsted major projects with announced contracts:

Wind Project	State Servicing	Size (MW)	Term (Years)	Price per MWh	Pricing Terms	Contract Status
Revolution Wind	Rhode Island	400	20	$98.43	Fixed price contract; no price escalation	Approved
Revolution Wind	Connecticut	304	20	$98.43 - $99.50	Fixed price contracts; no price escalation	Approved
South Fork Wind	New York (LIPA)	90	20	$160.33	2 percent average price escalation	Approved
South Fork Wind	New York (LIPA)	40	20	$86.25	2 percent average price escalation	Approved
Sunrise Wind	New York (NYSERDA)	924	25	$110.37 (1)	Fixed price contract; no price escalation	Approved

(1)    Index Offshore Wind Renewable Energy Certificate (OREC) strike price.

Revolution Wind and Sunrise Wind projects are subject to receipt of federal, state and local approvals necessary to construct and operate the projects. The federal permitting process is led by BOEM, and state approvals are required from New York, Rhode Island and Massachusetts. Significant delays in the siting and permitting process resulting from the timeline for obtaining approval from BOEM and the state and local agencies could adversely impact the timing of these projects' in-service dates.

Federal Siting and Permitting Process: The federal siting and permitting process for each of our offshore wind projects commence with the filing of a Construction and Operations Plan (COP) application with BOEM. The first major milestone in the BOEM review process is an issuance of a Notice of Intent (NOI) to complete an Environmental Impact Statement (EIS). BOEM then provides a final review schedule for the project’s COP approval. BOEM conducts environmental and technical reviews of the COP. The EIS assesses the environmental, social, and economic impacts of constructing the project and recommends measures to minimize impacts. The Final EIS will inform BOEM in deciding whether to approve the project or to approve with modifications and BOEM will then issue its Record of Decision. BOEM issues its final approval of the COP following the Record of Decision.

Revolution Wind and Sunrise Wind filed their COP applications with BOEM in March 2020 and September 2020, respectively. BOEM released its Draft EIS on September 2, 2022 for the Revolution Wind project and on December 16, 2022 for the Sunrise Wind project. The Draft EIS analyzes the potential environmental impacts of the project and the alternatives to the project to be evaluated as part of the process. Each of the identified alternative configurations in the Draft EISs had a similar level of environmental impacts, and if an alternative configuration was selected, the Revolution Wind project and the Sunrise Wind project would each still meet their respective contractual output requirements. For Revolution Wind, a final EIS is expected in the second quarter of 2023, the Record of Decision in the third quarter of 2023, and final approval is expected in the fourth quarter of 2023. For Sunrise Wind, a final EIS and Record of Decision are expected in the third quarter of 2023, and final approval is expected in the fourth quarter of 2023.

South Fork Wind, Revolution Wind and Sunrise Wind are each designated as a “Covered Project” pursuant to Title 41 of the Fixing America’s Surface Transportation Act (FAST41) and a Major Infrastructure Project under Section 3(e) of Executive Order 13807, which provides greater federal attention on meeting the projects’ permitting timelines.

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State and Local Siting and Permitting Process: State permitting applications in Rhode Island for Revolution Wind and in New York for Sunrise Wind were filed in December 2020. On July 8, 2022, the Rhode Island Energy Facilities Siting Board issued a Final Decision and Order approving the Revolution Wind project and granting a license to construct and operate. On September 23, 2022, Sunrise Wind filed a Joint Proposal to the New York State Public Service Commission. Among other things, the Joint Proposal includes proposed mitigation for certain environmental, community and construction impacts associated with constructing the project. The Joint Proposal was signed by the New York Departments of Public Service, Environmental Conservation, Transportation and State as well as the Office of Agriculture and Markets and the Long Island Commercial Fisheries Association. On November 17, 2022, the New York Public Service Commission approved an order adopting the Joint Proposal and granting a Certificate of Environmental Compatibility and Public Need. On November 18, 2022, Sunrise Wind filed its Environmental Management and Construction Plan (EM&CP) with the New York Public Service Commission, which details the plans on how the project will be constructed in accordance with the conditions of the approved Joint Proposal. Comments from several of the reviewing agencies and parties have been received and Sunrise Wind is in the process of reviewing and addressing those comments in the plan.

On November 9, 2022, the Towns of Brookhaven and Suffolk County executed the easements and other real estate rights necessary to construct the Sunrise Wind project. On November 28, 2022, the Town of North Kingstown and the Quonset Development Corporation approved Revolution Wind’s real estate PILOT terms and the personal property PILOT agreement necessary to construct the Revolution Wind project.

Construction Process: South Fork Wind received all required approvals to start construction and the project entered the construction phase in early 2022. Onshore activities for the project’s underground onshore transmission line and construction of the onshore interconnection facility located in East Hampton, New York are underway. Offshore activities began in the fourth quarter of 2022 with construction of the sea-to-shore conduit system. Other marine construction activities, including the project’s monopile foundations, 11-megawatt wind turbines, cable installation, and offshore substation, are expected to occur in 2023. Construction-related purchase agreements with third-party contractors and materials contracts have largely been secured. South Fork Wind faces several challenges and appeals of New York State and federal agency approvals, however it believes it is probable it will be able to overcome these challenges.

For Revolution Wind and Sunrise Wind, construction is expected to begin in the second half of 2023 once all necessary federal, state and local approvals are received.

Projected In-Service Dates: We expect the South Fork Wind project to be in-service by the end of 2023. For Revolution Wind and Sunrise Wind, based on the BOEM permit schedule included in each respective NOI outlining when BOEM will complete its review of the COP, we currently expect in-service dates in 2025 for both projects.

Projected Investments: For Revolution Wind and Sunrise Wind, we are preparing our final project designs and advancing the appropriate federal, state, and local siting and permitting processes along with our offshore wind partner, Ørsted. Construction of South Fork Wind is underway. Construction-related purchase agreements with third-party contractors and materials contracts have largely been secured. Subject to advancing our final project designs and federal, state and local permitting processes and construction schedules, we currently expect to make investments in our offshore wind business between $1.9 billion and $2.1 billion in 2023 and expect to make investments for our three projects in total between $1.6 billion and $1.9 billion from 2024 through 2026. These estimates assume that the three projects are completed and are in-service by the end of 2025, as planned. These projected investments could be impacted by the strategic review of our offshore wind investment.

FERC Regulatory Matters

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. Eversource has recorded a reserve of $39.1 million (pre-tax and excluding interest) for the second complaint period as of both December 31, 2022 and 2021. This reserve represents the difference between the billed rates during the second complaint period and a 10.57 percent base ROE and 11.74 percent incentive cap. The reserve consisted of $21.4 million for CL&P, $14.6 million for NSTAR Electric and $3.1 million for PSNH as of both December 31, 2022 and 2021.

On October 16, 2018, FERC issued an order on all four complaints describing how it intends to address the issues that were remanded by the Court. FERC proposed a new framework to determine (1) whether an existing ROE is unjust and unreasonable and, if so, (2) how to calculate a replacement ROE. Initial briefs were filed by the NETOs, Complainants and FERC Trial Staff on January 11, 2019 and reply briefs were filed on March 8, 2019. The NETOs' brief was supportive of the overall ROE methodology determined in the October 16, 2018 order provided the FERC does not change the proposed methodology or alter its implementation in a manner that has a material impact on the results.

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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. At this time, Eversource cannot predict how and when FERC will address the Court’s findings on the remand of the MISO FERC opinions or any potential associated impact on the NETOs’ four pending ROE complaint cases.

Given the significant uncertainty regarding the applicability of the FERC opinions in the MISO transmission owners’ two complaint cases to the NETOs’ pending four complaint cases, Eversource concluded that there is no reasonable basis for a change to the reserve or recognized ROEs for any of the complaint periods at this time. As well, Eversource cannot reasonably estimate a range of loss for any of the four complaint proceedings at this time. Eversource, CL&P, NSTAR Electric and PSNH currently record revenues at the 10.57 percent base ROE and incentive cap at 11.74 percent established in the October 16, 2014 FERC order.

A change of 10 basis points to the base ROE used to establish the reserves would impact Eversource’s after-tax earnings by an average of approximately $3 million for each of the four 15-month complaint periods. Prospectively from the date of a final FERC order implementing a new base ROE, based off of estimated 2022 rate base, a change of 10 basis points to the base ROE would impact Eversource’s future annual after-tax earnings by approximately $5 million per year, and will increase slightly over time as we continue to invest in our transmission infrastructure.

FERC Notice of Inquiry on ROE: On March 21, 2019, FERC issued a Notice of Inquiry (NOI) seeking comments from all stakeholders on FERC's policies for evaluating ROEs for electric public utilities, and interstate natural gas and oil pipelines. On June 26, 2019, the NETOs jointly filed comments supporting the methodology established in the FERC’s October 16, 2018 order with minor enhancements going forward. The NETOs jointly filed reply comments in the FERC ROE NOI on July 26, 2019. On May 12, 2020, the NETOs filed supplemental comments in the NOI ROE docket. At this time, Eversource cannot predict how this proceeding will affect its transmission ROEs.

FERC Notice of Inquiry and Proposed Rulemaking on Transmission Incentives: On March 21, 2019, FERC issued an NOI seeking comments on FERC's policies for implementing electric transmission incentives. On June 26, 2019, Eversource filed comments requesting that FERC retain policies that have been effective in encouraging new transmission investment and remain flexible enough to attract investment in new and emerging transmission technologies. Eversource filed reply comments on August 26, 2019. On March 20, 2020, FERC issued a Notice of Proposed Rulemaking (NOPR) on transmission incentives. The NOPR intends to revise FERC’s electric transmission incentive policies to reflect competing uses of transmission due to generation resource mix, technological innovation and shifts in load patterns. FERC proposes to grant transmission incentives based on measurable project economics and reliability benefits to consumers rather than its current project risks and challenges framework.  On July 1, 2020, Eversource filed comments generally supporting the NOPR.

On April 15, 2021, FERC issued a Supplemental NOPR that proposes to eliminate the existing 50 basis point return on equity for utilities that have been participating in a regional transmission organization (RTO ROE incentive) for more than three years. On June 25, 2021, the NETOs jointly filed comments strongly opposing FERC’s proposal. On July 26, 2021, the NETOs filed Supplemental NOPR reply comments responding to various parties advocating for the elimination of the RTO Adder. If FERC issues a final order eliminating the RTO ROE incentive as proposed in the Supplemental NOPR, the estimated annual impact (using 2022 estimated rate base) on Eversource’s after-tax earnings is approximately $18 million. The Supplemental NOPR contemplates an effective date 30 days from the final order.

At this time, Eversource cannot predict the ultimate outcome of these proceedings, including possible appellate review, and the resulting impact on its transmission incentives.

Regulatory Developments and Rate Matters

Electric, Natural Gas and Water Utility Retail Tariff Rates: Each Eversource utility subsidiary is subject to the regulatory jurisdiction of the state in which it operates:  CL&P, Yankee Gas and Aquarion operate in Connecticut and are subject to PURA regulation; NSTAR Electric, NSTAR Gas, EGMA and Aquarion operate in Massachusetts and are subject to DPU regulation; and PSNH and Aquarion operate in New Hampshire and are subject to NHPUC regulation.  The regulated companies' distribution rates are set by their respective state regulatory commissions, and their tariffs include mechanisms for periodically adjusting their rates for the recovery of specific incurred costs.  

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Base Distribution Rates:  In Connecticut, electric and natural gas utilities are required to file a distribution rate case within four years of the last rate case. CL&P's and Yankee Gas' base distribution rates were each established in 2018 PURA-approved rate case settlement agreements. On October 27, 2021, PURA approved a settlement agreement at CL&P that included a current base distribution rate freeze until no earlier than January 1, 2024. The approval of the settlement agreement satisfies the Connecticut statute of rate review requirements that requires electric utilities to file a distribution rate case within four years of the last rate case. Aquarion is not required to initiate a rate review with PURA on a set schedule. On August 29, 2022, Aquarion filed an application with PURA to amend its existing rate schedules and a final decision is expected March 15, 2023.

In Massachusetts, electric distribution companies are required to file distribution rate schedules every five years, and natural gas local distribution companies to file distribution rate schedules every 10 years, and those companies are limited to one settlement agreement in any 10-year period. NSTAR Electric's base distribution rates were established in a November 2022 DPU-approved rate case. NSTAR Gas' base distribution rates were established in an October 2020 DPU-approved rate case. EGMA's base distribution rates were established in an October 2020 DPU-approved rate settlement agreement. Aquarion is not required to initiate a rate review with the DPU. Aquarion’s base distribution rates were established in a 2018 DPU-approved rate case.

In New Hampshire, PSNH's base distribution rates were established in a December 2020 NHPUC-approved rate case settlement agreement. Aquarion's base distribution rates were established in a July 2022 NHPUC-approved rate case settlement agreement, with a single step adjustment approved on January 19, 2023. Rates are effective March 1, 2023.

Rate Reconciling Mechanisms: The Eversource electric distribution companies obtain and resell power to retail customers who choose not to buy energy from a competitive energy supplier.  The natural gas distribution companies procure natural gas for firm and seasonal customers. These energy supply procurement costs are recovered from customers in energy supply rates that are approved by the respective state regulatory commission.  The rates are reset periodically and are fully reconciled to their costs.  Each electric and natural gas distribution company fully recovers its energy supply costs through approved regulatory rate mechanisms on a timely basis and, therefore, such costs have no impact on earnings.

The electric and natural gas distribution companies also recover certain other costs in retail rates on a fully reconciling basis through regulatory commission-approved cost tracking mechanisms and, therefore, recovery of these costs has no impact on earnings. Costs recovered through cost tracking mechanisms include, among others, electric retail transmission charges, energy efficiency program costs, electric restructuring and stranded cost recovery revenues (including securitized RRB charges), certain capital tracking mechanisms for infrastructure improvements, and additionally for the Massachusetts utilities, pension and PBOP benefits, net metering for distributed generation, and solar-related programs. The reconciliation filings compare the total actual costs allowed to revenue requirements related to these services and the difference between the costs incurred (or the rate recovery allowed) and the actual costs allowed is deferred and included, to be either recovered or refunded, in future customer rates.  These cost tracking mechanisms also include certain incentives earned, return on capital tracking mechanisms, and carrying charges that are billed in rates to customers, which do impact earnings.

Connecticut:

CL&P Advanced Metering Infrastructure Filing: On July 31, 2020, CL&P submitted to PURA its proposed $512 million Advanced Metering Infrastructure investment and implementation plan. On August 17, 2021, PURA issued a Notice of Request for Amended EDC Advanced Metering Infrastructure Proposal. CL&P submitted an Amended Proposal in response to this request on November 8, 2021 with an updated schedule for the years 2022 through 2028, which included additional information as required by PURA. As required, the plan includes a full deployment of advanced metering functionality and a composite business case in support of the Advanced Metering Infrastructure plan. The procedural schedule includes briefs that were filed on April 29, 2022, written comments that were filed July 20, 2022, and a technical session on September 14, 2022.

CL&P Rate Relief Plan: On November 28, 2022, Governor Lamont, DEEP, Office of Consumer Counsel, and CL&P jointly developed a rate relief plan for electric customers for the winter peak season of January 1, 2023 through April 30, 2023. On December 16, 2022, PURA approved the rate relief plan. As part of the rate relief plan, CL&P reduced the Non-Bypassable Federally Mandated Congestion Charge (NBFMCC) rate effective January 1, 2023 to provide customers with an average $10 monthly bill credit from January through April 2023. This rate reduction accelerates the return to customers of net revenues generated by long-term state-approved energy contracts with the Millstone and Seabrook nuclear power plants of approximately $90 million. The rate relief plan also included instituting a temporary, flat monthly discount for qualifying low-income hardship customers effective January 1, 2023. This flat-rate credit will continue until a new low-income discount rate that was approved by PURA in an October 19, 2022 decision is implemented in 2024. These aspects of the rate relief plan do not impact CL&P’s earnings but do impact its future cash flows. Also as part of the rate relief plan, CL&P committed to contribute $10 million to an energy assistance program for qualifying hardship customers, which is expected to be distributed as a bill credit to those customers by the end of the first quarter of 2023. CL&P recorded a current liability of $10 million on the balance sheet and a charge to expense on the statement of income for the year ended December 31, 2022 associated with the customer assistance program.

CL&P Performance Based Rate Making: On May 26, 2021, in accordance with an October 2020 Connecticut law, PURA opened a proceeding to begin to evaluate and eventually implement performance based regulation for electric distribution companies. PURA will conduct the proceeding in two phases, with a draft decision on the first phase expected in March 2023 and then a procedural schedule established for the second phase. On January 25, 2023, PURA staff issued a proposal outlining a suggested portfolio of performance based regulation elements for further exploration and implementation in the second phase of the proceeding. At this time, we cannot predict the ultimate outcome of this proceeding and the resulting impact to CL&P.

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Aquarion Water Company of Connecticut Distribution Rate Case: On August 29, 2022, Aquarion Water Company of Connecticut (AWC-CT) filed an application with PURA to amend its existing rate schedules to address an operating revenue deficiency. AWC-CT’s rate application requested approval of rate increases of $27.5 million, an additional $13.6 million, and an additional $8.8 million, effective March 15, 2023, 2024, and 2025, respectively. A final decision from PURA is expected March 15, 2023.

Massachusetts:

NSTAR Electric Distribution Rates: As part of an inflation-based mechanism, NSTAR Electric submitted its fourth annual Performance Based

Rate (PBR) Adjustment filing on November 10, 2021 and on December 22, 2021, the DPU approved a $36.8 million increase to base distribution rates effective January 1, 2022.

NSTAR Electric Distribution Rate Case: On November 30, 2022, the DPU issued its decision in the NSTAR Electric distribution rate case and approved a base distribution rate increase of $64 million effective January 1, 2023. The DPU approved a renewal of the performance-based ratemaking (PBR) plan originally authorized in its previous rate case for a five-year term, with a corresponding stay out provision. The PBR plan term has the possibility of a five-year extension. The PBR mechanism allows for an annual adjustment to base distribution rates for inflation and exogenous events. The DPU also allowed for adjustments to the PBR mechanism for the recovery of future capital additions based on a historical five-year average of total capital additions, beginning with the January 1, 2024 PBR adjustment. The decision allows an authorized regulatory ROE of 9.80 percent on a capital structure including 53.2 percent equity.

Among other items, the DPU approved an increase to the annual storm fund contribution collected through base distribution rates from $10 million to $31 million, and allowed for the recovery of storm threshold costs of $1.3 million per storm event subsequent to the eighth storm in a calendar year (six recovered in base rates plus two additional storms). The DPU approved cost recovery of a portion of NSTAR Electric’s outstanding storm costs beginning on January 1, 2023 and January 1, 2024, subject to reconciliation from future prudency reviews. In a subsequent compliance filing, the DPU allowed recovery to commence for outstanding storm costs occurring between 2018 and 2022 and interest in a total of $162.1 million over a five-year period starting January 1, 2023. In addition, NSTAR Electric will begin to recover 2021 exogenous storms and interest in a total of $220.9 million over a five-year period beginning January 1, 2024. The DPU also approved the recovery of historical exogenous property taxes of $30.8 million incurred from 2020 through 2022 over a two-year period and $8.3 million incurred from 2012 through 2015 over a five-year period effective January 1, 2023. NSTAR Electric’s AMI Implementation Plan and a new Advanced Metering Infrastructure tariff (AMIF) reconciling mechanism effective January 1, 2023 were also approved and NSTAR Electric will recover all meter-related capital now through the AMIF as opposed to base distribution rates.

NSTAR Electric Grid Modernization Plan: On October 7, 2022, the DPU issued an order approving continuing investments from the initial 2018 to 2021 Grid Modernization Plan that were included in the 2022 to 2025 Grid Modernization Plan. The DPU established a preauthorized total budget cap of $162.6 million over the four-year plan period for these continuing investments. On November 30, 2022, the DPU issued an order that preauthorized a four-year $43.0 million budget for new grid-facing investments. All of the ongoing and new investments will have targeted cost recovery through NSTAR Electric’s annual grid modernization factor filings.

NSTAR Electric Advanced Metering Infrastructure Plan: On November 30, 2022, the DPU approved NSTAR Electric’s proposed Advanced Metering Infrastructure customer-facing investment and implementation plan (including program operating costs), including a full deployment of advanced metering functionality, for the years 2022 through 2028. The DPU established preauthorized total budget caps of $534.8 million for core AMI investments and corresponding operating costs and $133.1 million for supporting AMI investments and corresponding operating costs over the seven-year plan period. The DPU approved a new AMIF tariff reconciling mechanism effective January 1, 2023 to recover eligible costs associated with both AMI customer-facing investments and implementation costs. Investments above these budget caps can be recovered in a future base distribution rate proceeding.

NSTAR Electric Transmission Support Agreement: On June 17, 2022, FERC approved a transmission support agreement between NSTAR Electric and Park City Wind LLC (PCW). The agreement commits NSTAR Electric to construct certain transmission facilities required to interconnect PCW’s future 800 MW offshore wind generation facility to NSTAR Electric’s transmission system. Of the total estimated $196 million project, NSTAR Electric will finance an estimated $152 million and earn a return on those specific investments over a ten-year period once the facility is in operation based on the authorized return that is in effect at the applicable time for regional transmission service under the ISO-NE Open Access Transmission Tariff. The interconnection transmission facilities are currently expected to be in-service in 2026.

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NSTAR Electric CIP Filing: On December 30, 2022, the DPU approved a provisional system planning tariff for the recovery of costs associated with a capital investment project (CIP) proposal submitted by NSTAR Electric for one of six geographic study areas in its service territory in accordance with DPU’s directives. The DPU established a new, provisional framework for planning and funding upgrades to the electric power system to foster development and interconnection of distributed energy facilities. Under the DPU program, NSTAR Electric has filed infrastructure upgrade proposals to be built within a four-year construction timeframe that allocate the costs of interconnection upgrades between the interconnecting distributed generation facility and distribution customers. Payments made by the distributed generation facility will be applied against the total capital investment made by NSTAR Electric and NSTAR Electric will earn a return on the net investment. The amount allocated to distribution customers will be recovered through a reconciling mechanism, the Provisional System Planning Tariff. The DPU approved the first of these provisional system planning projects, the Marion-Fairhaven group study area, which will enable 141 MW of distributed energy to be interconnected at a total estimated cost of $119.7 million. Of the total $119.7 million, $65.8 million will be allocated to distribution customers, once the enabled distributed energy facilities capacity is fully subscribed by distributed energy facilities interconnecting customers. Additionally, NSTAR Electric will proceed with construction of $54 million of transmission upgrades necessary to improve local reliability and integrate distribution energy resources in the Marion-Fairhaven area and recover the amount through local transmission rates.

NSTAR Electric Electric Vehicles Program: On December 30, 2022, NSTAR Electric received DPU approval for a new Phase 2 electric vehicle (EV) charging infrastructure program (including operating costs) totaling $188 million over a four-year period, which includes make-ready costs and other EV expenditures to support the deployment of charging ports and provides incentives for charging infrastructure installed at commercial and residential sites in Massachusetts. NSTAR Electric will recover the cost of this program through an Electric Vehicle Program tariff.

NSTAR Gas Distribution Rates: As part of an inflation-based mechanism, NSTAR Gas submitted its second annual Performance Based Rate Adjustment filing on September 15, 2022 and on October 31, 2022, the DPU approved a $21.7 million increase to base distribution rates for effect on November 1, 2022. The increase is inclusive of a $4.5 million permanent increase related to exogenous property taxes and a $5.4 million increase related to an October 6, 2021 mitigation plan filing that delayed recovery of a portion of a base distribution rate increase originally scheduled to take effect November 1, 2021. The DPU also approved the recovery of historical exogenous property taxes incurred from November 1, 2020 through October 31, 2022 of $8.2 million over a two-year period through a separate reconciling mechanism effective November 1, 2022.

EGMA Distribution Rates: As established in an October 7, 2020 EGMA Rate Settlement Agreement approved by the DPU, on September 16, 2022 EGMA filed for its second base distribution rate increase and on October 31, 2022, the DPU approved a $6.7 million increase to base distribution rates and a $3.3 million increase to the Tax Act Credit Factor for effect on November 1, 2022. The DPU also approved the recovery of historical exogenous property taxes incurred from November 1, 2020 through October 31, 2022 of $8.6 million over a two-year period through a separate reconciling mechanism effective November 1, 2022. EGMA will request recovery of incremental property taxes incurred after October 31, 2022 in future exogenous filings.

New Hampshire:

PSNH Distribution Rates: In connection with an October 9, 2020 settlement agreement, PSNH was permitted three step increases to reflect qualifying plant additions in calendar years 2019, 2020 and 2021. The first two step adjustments had effective dates of January 1, 2021 and August 1, 2021, respectively. On October 20, 2022, the NHPUC approved the third step adjustment for 2021 plant in service to recover a revenue requirement of $8.9 million, with rates effective November 1, 2022. The total approved revenue requirement increase is being collected over the remainder of the rate year (November 1, 2022 – July 31, 2023).

PSNH Pole Acquisition Approval: On November 18, 2022, the NHPUC issued a decision that approved a proposed purchase agreement between PSNH and Consolidated Communications, in which PSNH would acquire approximately 343,000 jointly-owned utility poles and approximately 3,800 solely-owned poles and pole assets. The NHPUC also authorized PSNH to recover certain expenses associated with the operation and maintenance of the transferred poles, pole inspections, and vegetation management expenses through a new cost recovery mechanism, the Pole Plant Adjustment Mechanism (PPAM), subject to consummation of the purchase agreement. On December 16, 2022, a motion for rehearing of NHPUC’s approval was filed by an intervenor, which was denied by the NHPUC on February 8, 2023. PSNH cannot predict the timing of consummation of the proposed purchase agreement.

PSNH Energy Efficiency Plan: On November 12, 2021, the NHPUC issued an order rejecting the proposed 2021 through 2023 energy efficiency plan and significantly reduced funding and operational functions of the program. The order eliminated the recovery of performance incentives and made other key changes to the energy efficiency plan beginning in 2022. PSNH sought a rehearing of the order and was denied, which resulted in PSNH filing a formal appeal to the New Hampshire Supreme Court.

On February 10, 2022, the NHPUC issued an order that restored the 2022 energy efficiency rate to be consistent with the 2021 rate, which PSNH implemented effective March 1, 2022. On February 24, 2022, state legislation was signed into law that undid the most impactful effects of the November 12, 2021 NHPUC order. The legislation directed that the joint utility energy efficiency plan and programming framework in effect on January 1, 2021 be utilized going forward, including utility performance incentive payments, lost base revenue calculations, and Evaluation, Measurement, and Verification process. Additionally, the legislation established a process for future plan proposals, including the 2024 through 2026 triennial plan, and includes a mechanism for future rate increases based on the consumer price index. As a result of the new legislation passed specific to this order, PSNH withdrew its appeal to the New Hampshire Supreme Court. PSNH made the required filing for the remainder of the 2022 through 2023 triennial plan on March 1, 2022, which was approved as filed by the NHPUC on April 29, 2022.

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Legislative and Policy Matters

Massachusetts: On August 11, 2022, Governor Baker signed into law climate-related legislation which, among other things, affirms the state’s commitment to contract for 5,600 MW of offshore wind by June 30, 2027, modifies the bidding process to encourage more competition among offshore wind developers, and provides incentives to increase the manufacturing and assembly of offshore wind components in Massachusetts. The law also provides incentives to encourage the sale and leasing of electric vehicles, promotes energy storage and electrification technologies, directs electric companies to develop grid modernization plans to upgrade distribution and transmission facilities, and initiates a pilot program that would allow up to ten communities in the state to restrict fossil fuel use in new buildings. Additionally, for long-term contracts that are approved by the DPU between developers of offshore wind generation and the contracting electric distribution company, the law provides for an annual remuneration for the distribution company equal to 2.25 percent of the annual payments under the contract to compensate the distribution company for accepting the financial obligation of the long-term contract.

Federal: On August 16, 2022, the Inflation Reduction Act of 2022 (IRA) was signed into law. This is a broad package of legislation that includes incentives and support for clean energy resource development. Most notable for Eversource, the investment tax credit (ITC) on offshore wind projects increases from 30 percent to 40 percent if certain requirements for labor and domestic content are met. The act also re-establishes the production tax credit for solar and wind energy projects, gives increased credit for projects in certain communities, and sets credits for qualifying clean energy generation and energy storage projects. The tax provisions of the IRA provide additional incentives for offshore wind projects and could reduce retail electricity costs for our customers related to those clean energy investments. The IRA includes other tax provisions focused on implementing a 15 percent minimum tax on adjusted financial statement income and a one percent excise tax on corporate share repurchases. The Department of Treasury and the Internal Revenue Service issued limited guidance in the fourth quarter; however, they are expected to issue additional needed guidance with respect to the application of the newly enacted IRA provisions in the future. We will continue to monitor and evaluate impacts on our consolidated financial statements. We currently do not expect the alternative minimum tax change to have a material impact on our earnings, financial condition or cash flows.

Critical Accounting Policies

The preparation of financial statements in conformity with GAAP requires management to make estimates, assumptions and, at times, difficult, subjective or complex judgments. Changes in these estimates, assumptions and judgments, in and of themselves, could materially impact our financial position, results of operations or cash flows. Our management discusses with the Audit Committee of our Board of Trustees significant matters relating to critical accounting policies. Our critical accounting policies are discussed below. See the combined notes to our financial statements for further information concerning the accounting policies, estimates and assumptions used in the preparation of our financial statements.  

Regulatory Accounting:  Our regulated 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 our 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. In some cases, we record regulatory assets before approval for recovery has been received from the applicable regulatory commission. We must use judgment to conclude that costs deferred as regulatory assets are probable of future recovery. We base our conclusion on certain factors, including, but not limited to, regulatory precedent.

Regulatory liabilities represent either revenues received from customers to fund expected costs that have not yet been incurred or probable future refunds to customers. We make judgments regarding the future outcome of regulatory proceedings that involve potential future refund to customers and record liabilities for these loss contingencies when probable and reasonably estimable based upon available information. Regulatory liabilities are recorded at the best estimate, or at a low end of the range of possible loss. The amount recorded may differ from when the uncertainty is resolved. Such differences could have a significant impact on our financial statements.

We continually assess whether the regulatory assets and liabilities continue to meet the criteria for probable future recovery or refund. This assessment includes consideration of recent orders issued by regulatory commissions, the passage of new legislation, historical regulatory treatment for similar costs in each of our jurisdictions, discussions with legal counsel, the status of any appeals of regulatory decisions, and changes in applicable regulatory and political environments. We believe that we will continue to be able to defer and recover prudently incurred costs, including additional storm costs, based on the legal and regulatory framework.

We use judgment when recording regulatory assets and liabilities; however, regulatory commissions can reach different conclusions about the recovery of costs, and those conclusions could have a material impact on our financial statements. The ultimate outcome of regulatory rate proceedings could have a significant effect on our ability to recover costs or earn an adequate return. Established rates are also often subject to subsequent prudency reviews by state regulators, whereby various portions of rates could be adjusted, subject to refund or disallowed. Storm restoration and pre-staging costs are subject to prudency reviews from our regulators. We have approximately $1.4 billion of deferred storm costs that either have yet to be filed with the applicable regulatory commission, are pending regulatory approval, or are subject to prudency review as of December 31, 2022. Tropical Storm Isaias resulted in deferred storm restoration costs of approximately $235 million at CL&P as of December 31, 2022. While it is possible that some amount of the Tropical Storm Isaias costs may be disallowed by PURA in a future proceeding, any such

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amount cannot be estimated at this time. We believe that our storm restoration costs were prudently incurred, meet the criteria for cost recovery and are probable of recovery.

We believe it is probable that each of our regulated companies will recover its respective investments in long-lived assets and the regulatory assets that have been recorded. If we determine that we can no longer apply the accounting guidance applicable to rate-regulated enterprises, or that we cannot conclude it is probable that costs will 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.

Pension, SERP and PBOP:  We sponsor Pension, SERP and PBOP Plans to provide retirement benefits to our employees.  Plan assets and the benefit obligation are presented on a net basis and we recognize the overfunded or underfunded status of the plans as an asset or liability on the balance sheet. These amounts are remeasured annually using a December 31st measurement date. For each of these plans, several significant assumptions are used to determine the projected benefit obligation, funded status and net periodic benefit expense/income. These assumptions include the expected long-term rate of return on plan assets, discount rate, compensation/progression rate and mortality and retirement assumptions.  We evaluate these assumptions annually and adjust them as necessary.  Changes in these assumptions could have a material impact on our financial position, results of operations or cash flows.

Expected Long-Term Rate of Return on Plan Assets Assumption:  In developing the expected long-term rate of return, we consider historical and expected returns, as well as input from our consultants.  Our expected long-term rate of return on assets is based on assumptions regarding target asset allocations and corresponding expected rates of return for each asset class.  We routinely review the actual asset allocations and periodically rebalance the investments to the targeted asset allocations.  For the year ended December 31, 2022, our expected long-term rate-of-return assumption used to determine our pension and PBOP expense was 8.25 percent for the Eversource Service plans and 7 percent for the Aquarion plans.  For the forecasted 2023 pension and PBOP expense, an expected long-term rate of return of 8.25 percent for the Eversource Service plans and 7 percent for the Aquarion plans will be used reflecting our target asset allocations.

Discount Rate Assumptions:  Payment obligations related to the Pension, SERP and PBOP Plans are discounted at interest rates applicable to the expected timing of each plan's cash flows.  The discount rate that was utilized in determining the pension, SERP and PBOP obligations was based on a yield-curve approach.  This approach utilizes a population of bonds with an average rating of AA based on bond ratings by Moody's, S&P and Fitch, and uses bonds with above median yields within that population.  As of December 31, 2022, the discount rates used to determine the funded status were within a range of 5.1 percent to 5.2 percent for the Pension and SERP Plans, and 5.2 percent for the PBOP Plans.  As of December 31, 2021, the discount rates used were within a range of 2.8 percent to 3.0 percent for the Pension and SERP Plans, and within a range of 2.91 percent to 2.92 percent for the PBOP Plans.  The increase in the discount rates used to calculate the funded status resulted in a decrease to the Pension and SERP Plans’ projected benefit obligation and the PBOP Plans' projected benefit obligation of $1.48 billion and $180.1 million, respectively, as of December 31, 2022.  

The Company uses the spot rate methodology for the service and interest cost components of Pension, SERP and PBOP expense because it provides a relatively precise measurement by matching projected cash flows to the corresponding spot rates on the yield curve.  The discount rates used to estimate the 2022 expense were within a range of 2.2 percent to 3.2 percent for the Pension and SERP Plans, and within a range of 2.3 percent to 3.3 percent for the PBOP Plans.  

Mortality Assumptions:  Assumptions as to mortality of the participants in our Pension, SERP and PBOP Plans are a key estimate in measuring the expected payments a participant may receive over their lifetime and the corresponding plan liability we need to record. The mortality assumption is composed of a base table that represents the current expectation of life expectancy of the population adjusted by an improvement scale that attempts to anticipate future improvements in life expectancy. In 2022, our mortality assumption utilized the Society of Actuaries base mortality tables (Pri-2012), adjusted to reflect Eversource’s own mortality experience, and projected generationally using the MP-2021 improvement scale.

Compensation/Progression Rate Assumptions:  This assumption reflects the expected long-term salary growth rate, including consideration of the levels of increases built into collective bargaining agreements, and impacts the estimated benefits that Pension and SERP Plan participants will receive in the future.  As of December 31, 2022 and 2021, the compensation/progression rates used to determine the funded status were within a range of 3.5 percent to 4.0 percent.  

Health Care Cost Assumptions: The Eversource Service PBOP Plan is not subject to health care cost trends. As of December 31, 2022, for the Aquarion PBOP Plan, the health care trend rate used to determine the funded status for pre-65 retirees is 7 percent, with an ultimate rate of 5 percent in 2031, and for post-65 retirees, the health care trend rate and ultimate rate is 3.5 percent.

Actuarial Gains and Losses:  Actuarial gains and losses represent the differences between actuarial assumptions and actual information or updated assumptions. Unamortized actuarial gains or losses arising at the December 31st measurement date are primarily from differences in actual investment performance compared to our expected return and changes in the discount rate assumption. The Eversource Service Pension and PBOP Plans use the corridor approach to determine the amount of gain or loss to amortize into net periodic benefit expense/income. The corridor approach defers all actuarial gains and losses arising at remeasurement and the net unrecognized actuarial gain or loss balance is amortized as a component of expense if, as of the beginning of the year, that net gain or loss exceeds 10 percent of the greater of the market value of the plan’s assets or the projected benefit obligation. The amount of net unrecognized actuarial gain or loss in excess of the 10 percent corridor is amortized to expense over the estimated average future employee service period. For the Eversource Service Pension Plan, the net actuarial gain or loss is amortized as a component of expense over the estimated average future employee service period of seven years. For the Eversource Service PBOP Plan, the net unrecognized actuarial gain or loss was within the 10 percent corridor and therefore there was no amortization to expense during 2022.

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An increase in the discount rate used to determine our pension funded status would decrease our projected benefit obligation at December 31st, resulting in a lower unamortized actuarial loss to be recognized in future years’ pension expense, subject to exceeding the 10 percent corridor. An increase in the discount rate at December 31st would also result in an increase in the interest cost component and a decrease in the service cost component of the subsequent year’s benefit plan expense.

The calculated expected return on plan assets is compared to the actual return or loss on plan assets at the end of each year to determine the investment gains or losses to be immediately reflected in unamortized actuarial gains and losses.  An underperformance of our pension plan investment returns relative to the expected returns would increase our pension liability at December 31st, resulting in a higher unamortized actuarial loss to be recognized in future years’ pension expense, subject to exceeding the 10 percent corridor, and a lower expected return on assets component of pension expense in future years’ pension expense.

Net Periodic Benefit Expense/Income: Pension, SERP and PBOP expense/income is determined by our actuaries and consists of service cost and prior service cost/credit, interest cost based on the discounting of the obligations, amortization of actuarial gains and losses, and the expected return on plan assets. For the Pension and SERP Plans, pre-tax net periodic benefit income was $181.6 million for the year ended December 31, 2022, and there was pre-tax net periodic benefit expense of $23.6 million and $56.9 million for the years ended December 31, 2021 and 2020, respectively.  For the PBOP Plans, pre-tax net periodic benefit income was $79.8 million, $60.5 million and $51.6 million for the years ended December 31, 2022, 2021 and 2020, respectively.  

The change in pension, SERP and PBOP expense/income arising from the annual remeasurement does not fully impact earnings. Our Massachusetts utilities recover qualified pension and PBOP expenses related to their distribution operations through a rate reconciling mechanism that fully tracks the change in net pension and PBOP expenses each year, therefore the change in their pension and PBOP expense does not impact earnings. Our electric transmission companies' rates provide for an annual true-up of estimated to actual costs, which include pension and PBOP expenses, therefore the change in their pension and PBOP expense does not impact earnings. Additionally, the portion of our pension and PBOP expense that relates to company labor devoted to capital projects is capitalized on the balance sheet instead of being charged to expense.

Forecasted Expense/Income and Expected Contributions:  We estimate that net periodic benefit income in 2023 for the Pension and SERP Plans will be approximately $114 million and for the PBOP Plans will be approximately $57 million. The change in pension income from 2022 to 2023 is driven primarily by an increase in the interest cost component due to a higher discount rate and lower expected return on assets due to a lower asset balance, partially offset by lower amortization of actuarial losses due to unrecognized actuarial gains arising in 2022. The change in PBOP income from 2022 to 2023 is driven primarily by an increase in the interest cost component due to a higher discount rate and lower expected return on assets due to a lower asset balance. For the PBOP Plans, there is no amortization of actuarial losses in 2023. Pension, SERP and PBOP expense/income for subsequent years will depend on future investment performance, changes in future discount rates and other assumptions, and various other factors related to the populations participating in the plans.

Our policy is to fund the Pension Plans annually in an amount at least equal to the amount that will satisfy all federal funding requirements.  We contributed $80.0 million to the Pension Plans in 2022.  Based on the current status of the Pension Plans and federal pension funding requirements, there is no minimum funding requirement for our Eversource Service Pension Plan in 2023 and we do not expect to make pension contributions in 2023. It is our policy to fund the PBOP Plans annually through tax deductible contributions to external trusts. We do not expect to make any contributions to the Eversource Service PBOP Plan in 2023. We contributed $3.1 million to the Aquarion PBOP Plan in 2022.  We currently estimate contributing $5.0 million and $2.9 million to the Aquarion Pension and PBOP Plans, respectively in 2023.

Sensitivity Analysis:  The following table illustrates the hypothetical effect on reported annual net periodic benefit income as a result of a change in the following assumptions by 50 basis points:

	Pension Plans (excluding SERP Plans)				PBOP Plans
	Decrease in Plan Income		Increase in Plan Expense		Decrease in Plan Income
(Millions of Dollars)	For the Years Ended December 31,				For the Years Ended December 31,
Eversource	2022		2021		2022		2021
Lower expected long-term rate of return	$	32.5	$	26.5	$	5.6	$	4.8
Lower discount rate	32.6		27.0		1.7		2.6
Higher compensation rate	7.6		9.9		N/A		N/A

Goodwill:  We recorded goodwill on our balance sheet associated with previous mergers and acquisitions, all of which totaled $4.52 billion as of December 31, 2022. We have identified our reporting units for purposes of allocating and testing goodwill as Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution.  Electric Distribution and Electric Transmission reporting units include carrying values for the respective components of CL&P, NSTAR Electric and PSNH.  The Natural Gas Distribution reporting unit includes the carrying values of NSTAR Gas, Yankee Gas and EGMA. The Water Distribution reporting unit includes the Aquarion water utility businesses.  As of December 31, 2022, goodwill was allocated to the reporting units as follows: $2.54 billion to Electric Distribution, $577 million to Electric Transmission, $451 million to Natural Gas Distribution and $951 million to Water Distribution.

Goodwill recorded and allocated to the Water Distribution reporting unit included $44.8 million in 2022 arising from the acquisition of The Torrington Water Company on October 3, 2022 and $22.2 million arising from the acquisition of NESC on December 1, 2021, which included measurement period increases in 2022 totaling $0.5 million.

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We are required to test goodwill balances for impairment at least annually by considering the fair values of the reporting units, which requires us to use estimates and judgments. Additionally, we monitor all relevant events and circumstances during the year to determine if an interim impairment test is required. We have selected October 1st of each year as the annual goodwill impairment test date. Goodwill impairment is deemed to exist if the carrying amount of a reporting unit exceeds its estimated fair value. If goodwill were deemed to be impaired, it would be written down in the current period to the extent of the impairment.

In assessing goodwill for impairment, an entity is permitted to first assess qualitatively whether it is more likely than not that goodwill impairment exists as of the annual impairment test date. A quantitative impairment test is required only if it is concluded that it is more likely than not that a reporting unit’s fair value is less than its carrying amount.

We performed an impairment assessment of goodwill as of October 1, 2022 for the Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution reporting units. Our qualitative assessment included an evaluation of multiple factors that impact the fair value of the reporting units, including general, macroeconomic and market conditions, and entity-specific assumptions that affect the future cash flows of the reporting units. Key considerations include discount rates, utility sector market performance and merger transaction multiples, the Company's share price and credit ratings, analyst reports, financial performance, cost and risk factors, internal estimates and projections of future cash flows and net income, long-term strategy, the timing and outcome of rate cases, and recent regulatory and legislative proceedings.

The 2022 goodwill impairment assessment resulted in a conclusion that goodwill is not impaired and no reporting unit is at risk of a goodwill impairment. We believe that the fair value of the reporting units was substantially in excess of carrying value. Adverse regulatory actions, changes in the regulatory and political environment, or changes in significant assumptions could potentially result in future goodwill impairment indicators.

Long-Lived Assets: Impairment evaluations of long-lived assets, including property, plant and equipment and other assets, involve a significant degree of estimation and judgment, including identifying circumstances that indicate an impairment may exist. An impairment analysis is required when events or changes in circumstances indicate that the carrying value of a long-lived asset may not be recoverable. Indicators of potential impairment include a deteriorating business climate, unfavorable regulatory action, decline in value that is other than temporary in nature, plans to dispose of a long-lived asset significantly before the end of its useful life, and accumulation of costs that are in excess of amounts allowed for recovery. The review of long-lived assets for impairment utilizes significant assumptions about operating strategies and external developments, including assessment of current and projected market conditions that can impact future cash flows. If indicators are present for a long-lived asset or asset group, a comparison of the undiscounted expected future cash flows to the carrying value is performed. No impairments occurred during the year 2022.

Equity Method Investments: Investments in affiliates where we have the ability to exercise significant influence, but not control, over an investee are initially recognized as an equity method investment at cost. Any differences between the cost of an investment and the amount of underlying equity in net assets of an investee are considered basis differences and are determined based upon the estimated fair values of the investee's identifiable assets and liabilities. For our offshore wind equity method investment, basis differences are related to intangible assets for PPAs that will be amortized over the term of the PPAs, and equity method goodwill that is not amortized. Capitalized interest associated with our offshore wind equity method investment is included in the investment balance.

Equity method investments are assessed for impairment when conditions exist that indicate that the fair value of the investment is less than book value.  If the decline in value is considered to be other-than-temporary, the investment is written down to its estimated fair value, which establishes a new cost basis in the investment. Impairment evaluations involve a significant degree of judgment and estimation, including identifying circumstances that indicate an impairment may exist at the equity method investment level, selecting discount rates used to determine fair values, and developing an estimate of discounted future cash flows expected from investment operations or the sale of the investment. No impairments occurred during 2022. Eversource continually monitors and evaluates its equity method investments to determine if there are indicators of an other-than-temporary impairment.

Income Taxes: Income tax expense is estimated for each of the jurisdictions in which we operate and is recorded each quarter using an estimated annualized effective tax rate. This process to record income tax expense involves estimating current and deferred income tax expense or benefit and the impact of temporary differences resulting from differing treatment of items for financial reporting and income tax return reporting purposes. Such differences are the result of timing of the deduction for expenses, as well as any impact of permanent differences, or other items that directly impact income tax expense as a result of regulatory activity (flow-through items). The temporary differences and flow-through items result in deferred tax assets and liabilities that are included in the balance sheets.

We also account for uncertainty in income taxes, which applies to all income tax positions previously filed in a tax return and income tax positions expected to be taken in a future tax return that have been reflected on our balance sheets. The determination of whether a tax position meets the recognition threshold under applicable accounting guidance is based on facts and circumstances available to us.

The interpretation of tax laws and associated regulations involves uncertainty since tax authorities may interpret the laws differently. Ultimate resolution or clarification of income tax matters may result in favorable or unfavorable impacts to net income and cash flows, and adjustments to tax-related assets and liabilities could be material.

Significant management judgment is required in determining the provision for income taxes, primarily due to the uncertainty related to tax positions taken, as well as deferred tax assets and liabilities and valuation allowances. We evaluate the probability of realizing deferred tax assets by reviewing a forecast of future taxable income and our intent and ability to implement tax planning strategies, if necessary, to realize deferred tax assets. We also assess negative evidence, such as the expiration of historical operating loss or tax credit carryforwards, that could indicate the

44

inability to realize the deferred tax assets. Valuation allowances are provided to reduce deferred tax assets to the amount that will more likely than not be realized in future periods. This requires management to make judgments and estimates regarding the amount and timing of the reversal of taxable temporary differences, expected future taxable income, and the impact of tax planning strategies.

Actual income taxes could vary from estimated amounts due to the future impacts of various items, including future changes in income tax laws, not realizing expected tax planning strategy amounts, as well as results of audits and examinations of filed tax returns by taxing authorities.

Accounting for Environmental Reserves:  Environmental reserves are accrued when assessments indicate it is probable that a liability has been incurred and an amount can be reasonably estimated. Increases to estimates of environmental liabilities could have an adverse impact on earnings. We estimate these liabilities based on findings through various phases of the assessment, considering the most likely action plan from a variety of available remediation options (ranging from no action required to full site remediation and long-term monitoring), current site information from our site assessments, remediation estimates from third party engineering and remediation contractors, and our prior experience in remediating contaminated sites.  If a most likely action plan cannot yet be determined, we estimate the liability based on the low end of a range of possible action plans. A significant portion of our environmental sites and reserve amounts relate to 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 we may have potential liability.  Estimates are based on the expected remediation plan. Our estimates are subject to revision in future periods based on actual costs or new information from other sources, including the level of contamination at the site, the extent of our responsibility or the extent of remediation required, recently enacted laws and regulations or a change in cost estimates.  

Fair Value Measurements:  We follow fair value measurement guidance that defines fair value as the price that would be received for the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price).  We have applied this guidance to our Company's derivative contracts that are not elected or designated as "normal purchases” or “normal sales,” to marketable securities held in trusts, and to our investments in our Pension and PBOP Plans. Fair value measurements are also incorporated into the accounting for 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.

Changes in fair value of our derivative contracts are recorded as Regulatory Assets or Liabilities, as we recover the costs of these contracts in rates charged to customers.  These valuations are sensitive to the prices of energy-related products in future years and assumptions made.

We use quoted market prices when available to determine the fair value of financial instruments.  When quoted prices in active markets for the same or similar instruments are not available, we value derivative contracts using models that incorporate both observable and unobservable inputs.  Significant unobservable inputs utilized in the models include energy-related product prices for future years for long-dated derivative contracts and market volatilities.  Discounted cash flow valuations incorporate estimates of premiums or discounts, reflecting risk-adjusted profit that would be required by a market participant to arrive at an exit price, using available historical market transaction information. Valuations of derivative contracts also reflect our estimates of nonperformance risk, including credit risk.

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RESULTS OF OPERATIONS – EVERSOURCE ENERGY AND SUBSIDIARIES

The following provides the amounts and variances in operating revenues and expense line items in the statements of income for Eversource for the years ended December 31, 2022 and 2021 included in this Annual Report on Form 10-K: 

	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		Increase
Operating Revenues	$	12,289.3	$	9,863.1	$	2,426.2
Operating Expenses:
Purchased Power, Purchased Natural Gas and Transmission	5,014.1		3,372.3		1,641.8
Operations and Maintenance	1,865.3		1,739.7		125.6
Depreciation	1,194.2		1,103.0		91.2
Amortization	448.9		232.0		216.9
Energy Efficiency Programs	658.0		592.8		65.2
Taxes Other Than Income Taxes	910.6		830.0		80.6
Total Operating Expenses	10,091.1		7,869.8		2,221.3
Operating Income	2,198.2		1,993.3		204.9
Interest Expense	678.3		582.4		95.9
Other Income, Net	346.1		161.3		184.8
Income Before Income Tax Expense	1,866.0		1,572.2		293.8
Income Tax Expense	453.6		344.2		109.4
Net Income	1,412.4		1,228.0		184.4
Net Income Attributable to Noncontrolling Interests	7.5		7.5		—
Net Income Attributable to Common Shareholders	$	1,404.9	$	1,220.5	$	184.4

Operating Revenues

Sales Volumes: A summary of our retail electric GWh sales volumes, our firm natural gas MMcf sales volumes, and our water MG sales volumes, and percentage changes, is as follows:  

	Electric				Firm Natural Gas				Water
	Sales Volumes (GWh)		Percentage (Decrease)/Increase		Sales Volumes (MMcf)		Percentage Increase		Sales Volumes (MG)		Percentage Increase
	2022	2021			2022	2021			2022	2021
Traditional	7,764	7,782	(0.2)	%	—	—	—	%	1,857	1,256	47.9	%
Decoupled and Special Contracts (1)	43,493	43,228	0.6	%	152,291	150,145	1.4	%	23,154	22,099	4.8	%
Total Sales Volumes	51,257	51,010	0.5	%	152,291	150,145	1.4	%	25,011	23,355	7.1	%

(1)     Special contracts are unique to Yankee Gas natural gas distribution customers who take service under such an arrangement and generally specify the amount of distribution revenue to be paid to Yankee Gas regardless of the customers' usage.

Weather, fluctuations in energy supply costs, conservation measures (including utility-sponsored energy efficiency programs), and economic conditions affect customer energy usage and water consumption. Industrial sales volumes are less sensitive to temperature variations than residential and commercial sales volumes. In our service territories, weather impacts both electric and water sales volumes during the summer and both electric and natural gas sales volumes during the winter; however, natural gas sales volumes are more sensitive to temperature variations than electric sales volumes. Customer heating or cooling usage may not directly correlate with historical levels or with the level of degree-days that occur.

Fluctuations in retail electric sales volumes at PSNH impact earnings ("Traditional" in the table above). For CL&P, NSTAR Electric, NSTAR Gas, EGMA, Yankee Gas, and our Connecticut water distribution business, fluctuations in retail sales volumes do not materially impact earnings due to their respective regulatory commission-approved distribution revenue decoupling mechanisms ("Decoupled" in the table above). These distribution revenues are decoupled from their customer sales volumes, which breaks the relationship between sales volumes and revenues recognized.

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Operating Revenues: Operating Revenues by segment increased in 2022, as compared to 2021, as follows:

(Millions of Dollars)	Increase/(Decrease)
Electric Distribution	$	1,981.7
Natural Gas Distribution	426.0
Electric Transmission	174.1
Water Distribution	11.2
Other	81.5
Eliminations	(248.3)
Total Operating Revenues	$	2,426.2

Electric and Natural Gas (excluding EGMA) Distribution Revenues:

Base Distribution Revenues:

•Base electric distribution revenues increased $43.4 million in 2022, as compared to 2021, due primarily to the impact of base distribution rate increases at NSTAR Electric effective January 1, 2022 resulting from its annual Performance Based Rate Adjustment filing and at PSNH effective August 1, 2021 and November 1, 2022.

•Base natural gas distribution revenues (excluding EGMA) increased $21.4 million in 2022, as compared to 2021, due primarily to base distribution rate increases at NSTAR Gas effective November 1, 2021 and November 1, 2022.

Electric distribution revenues at CL&P also increased $93.4 million in 2022, as compared to 2021, due to the absence of a 2021 reserve established to provide bill credits to customers as a result of CL&P’s settlement agreement on October 1, 2021 and a storm performance penalty assessed by PURA. In the 2021 settlement agreement, CL&P agreed to provide a total of $65 million of customer credits, which were distributed based on customer sales over a two-month period from December 1, 2021 to January 31, 2022. Additionally, CL&P recorded a $28.4 million reserve in 2021 for a civil penalty for non-compliance with storm performance standards that was provided as credits to customers on electric bills beginning on September 1, 2021 over a one-year period.

Tracked Distribution Revenues: Tracked distribution revenues consist of certain costs that are recovered from customers in retail rates through regulatory commission-approved cost tracking mechanisms and therefore, recovery of these costs has no impact on earnings. Revenues from certain of these cost tracking mechanisms also include certain incentives earned, return on capital tracking mechanisms, and carrying charges that are billed in rates to customers, which do impact earnings. Costs recovered through cost tracking mechanisms include, among others, energy supply and natural gas supply procurement and other energy-related costs, electric retail transmission charges, energy efficiency program costs, electric restructuring and stranded cost recovery revenues (including securitized RRB charges), certain capital tracking mechanisms for infrastructure improvements, and additionally for the Massachusetts utilities, pension and PBOP benefits, net metering for distributed generation, and solar-related programs. Tracked revenues also include wholesale market sales transactions, such as sales of energy and energy-related products into the ISO-NE wholesale electricity market, sales of natural gas to third party marketers, and the sale of RECs to various counterparties.

Customers have the choice to purchase electricity from each Eversource electric utility or from a competitive third party supplier. For customers who have contracted separately with these competitive suppliers, revenue is not recorded for the sale of the electricity commodity, as the utility is acting as an agent on behalf of the third party supplier. For customers that choose to purchase electric generation from CL&P, NSTAR Electric or PSNH, each purchases power on behalf of, and is permitted to recover the related energy supply cost without mark-up from, its customers, and records offsetting amounts in revenues and purchased power and amortization expense related to this energy supply procurement. CL&P, NSTAR Electric and PSNH each remain as the distribution service provider for all customers and charge a regulated rate for distribution delivery service recorded in revenues.

Tracked distribution revenues increased/(decreased) in 2022, as compared to 2021, due primarily to the following:

(Millions of Dollars)	Electric Distribution		Natural Gas Distribution
Retail Tariff Tracked Revenues:
Energy supply procurement	$	1,032.9	$	144.1
Retail transmission	246.8		—
CL&P FMCC	(87.8)		—
Energy efficiency	52.9		(1.4)
Stranded costs	(72.5)		—
Other distribution tracking mechanisms	49.8		31.7
Wholesale Market Sales Revenue	615.1		33.3

The increase in energy supply procurement within electric distribution and natural gas distribution in 2022, as compared to 2021, was driven by higher average prices and higher average supply-related sales volumes. Fluctuations in retail transmission revenues are driven by the recovery of the costs of our wholesale transmission business, such as those billed by ISO-NE and Local and Regional Network Service charges. For further information, see "Purchased Power, Purchased Natural Gas and Transmission Expense" below.

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The increase in electric distribution wholesale market sales revenue in 2022, as compared to 2021, was due primarily to higher average electricity market prices received for wholesale sales at CL&P, NSTAR Electric and PSNH. ISO-NE average market prices received for CL&P’s wholesale sales increased approximately 90 percent in 2022, as compared to 2021, driven primarily by higher natural gas prices in New England. The increase was also due to higher wholesale sales volumes at CL&P resulting from the sale of output generated by the Seabrook PPA beginning in the first quarter of 2022. Volumes sold into the market were primarily from the sale of output generated by the Millstone PPA and Seabrook PPA that CL&P entered into in 2019, as required by regulation. CL&P sells the energy purchased from Millstone and Seabrook into the wholesale market and uses the proceeds from the energy sales to offset the contract costs. The net sales or net cost amount is refunded to, or recovered from, customers in the non-bypassable component of the CL&P FMCC rate. The increase in electric distribution wholesale market sales revenues was also driven by higher proceeds from the sale of transmission rights over a one-year period under CL&P’s, NSTAR Electric’s and PSNH’s Hydro-Quebec transmission support agreements. Proceeds from these sales are credited back to customers.

The decrease in CL&P’s FMCC revenues and PSNH’s stranded cost revenues was driven by decreases in the retail rate, which reflect the net benefit of higher wholesale market sales received in the ISO-NE market for long-term state approved energy contracts at CL&P and PSNH, which are then credited back to customers through these retail rates. The decrease in PSNH’s stranded cost revenues was also due to lower stranded costs to be recovered due to higher Regional Greenhouse Gas Initiative (RGGI) proceeds received, which are credited back to customers.

EGMA Natural Gas Distribution Revenues: EGMA total operating revenues at the natural gas distribution segment increased by $193.8 million in 2022, as compared to 2021. Included in the total operating revenues increase was EGMA’s base natural gas distribution revenues increase of $26.3 million in 2022, as compared to 2021, due primarily to base distribution rate increases effective November 1, 2021 and November 1, 2022.

Electric Transmission Revenues:  Electric transmission revenues increased $174.1 million in 2022, as compared to 2021, due primarily to a higher transmission rate base as a result of our continued investment in our transmission infrastructure.

Other Revenues and Eliminations: Other revenues primarily include the revenues of Eversource's service company, most of which are eliminated in consolidation. Eliminations are also primarily related to the Eversource electric transmission revenues that are derived from ISO-NE regional transmission charges to the distribution businesses of CL&P, NSTAR Electric and PSNH that recover the costs of the wholesale transmission business in rates charged to their customers.

Purchased Power, Purchased Natural Gas and Transmission expense includes costs associated with purchasing electricity and natural gas on behalf of our customers and the cost of energy purchase contracts, as required by regulation.  These electric and natural gas supply costs and other energy-related costs are recovered from customers in rates through commission-approved cost tracking mechanisms, which have no impact on earnings (tracked costs).  Purchased Power, Purchased Natural Gas and Transmission expense increased in 2022, as compared to 2021, due primarily to the following:

(Millions of Dollars)	Increase
Purchased Power Costs	$	1,217.5
Natural Gas Costs	307.7
Transmission Costs	277.1
Eliminations	(160.5)
Total Purchased Power, Purchased Natural Gas and Transmission	$	1,641.8

The increase in purchased power expense at the electric distribution business in 2022, as compared to 2021, was driven primarily by higher energy supply procurement costs resulting from higher average prices and higher average supply-related sales volumes, as well as higher long-term contractual energy-related costs that are recovered in the non-bypassable component of the FMCC mechanism at CL&P, and higher net metering costs at NSTAR Electric and CL&P.

The increase in costs at the natural gas distribution segment in 2022, as compared to 2021, was due primarily to higher average prices and higher average supply-related sales volumes.

The increase in transmission costs in 2022, as compared to 2021, was primarily the result of an increase resulting from the retail transmission cost deferral, which reflects the actual cost of transmission service compared to estimated amounts billed to customers. This was partially offset by a decrease in Local Network Service charges, which reflects the cost of transmission service provided by Eversource over our local transmission network, and a decrease in costs billed by ISO-NE that support regional grid investments.

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Operations and Maintenance expense includes tracked costs and costs that are part of base electric, natural gas and water distribution rates with changes impacting earnings (non-tracked costs).  Operations and Maintenance expense increased in 2022, as compared to 2021, due primarily to the following:

(Millions of Dollars)	Increase/(Decrease)
Base Electric Distribution (Non-Tracked Costs):
General costs (including vendor services in corporate areas, insurance, fees and assessments)	$	26.8
Shared corporate costs (including computer software depreciation at Eversource Service)	25.0
Storm costs	22.0
Commitment to energy assistance program as part of CL&P rate relief plan	10.0
Operations-related expenses (including vegetation management, vendor services and vehicles)	4.4
Employee-related expenses, including labor and benefits	(20.5)
Absence in 2022 of CL&P charge to fund various customer assistance initiatives associated with the settlement agreement on October 1, 2021	(10.0)
Other non-tracked operations and maintenance	20.3
Total Base Electric Distribution (Non-Tracked Costs)	78.0
Tracked Electric Costs (Electric Distribution and Electric Transmission) - Increase due primarily to higher transmission expenses of $35.1 million and increase of $34.7 million due to higher pension tracking mechanism at NSTAR Electric	72.4
Total Electric Distribution and Electric Transmission	150.4
Natural Gas Distribution:
Base (Non-Tracked Costs) - Increase due primarily to higher employee-related expenses and higher shared corporate costs	12.6
Tracked Costs	18.6
Total Natural Gas Distribution	31.2
Water Distribution	8.3
Parent and Other Companies and Eliminations:
Eversource Parent and Other Companies - other operations and maintenance	30.5
Transaction and Transition Costs	(11.8)
Eliminations	(83.0)
Total Operations and Maintenance	$	125.6

Depreciation expense increased in 2022, as compared to 2021, due to higher utility plant in service balances.

Amortization expense includes the deferral of energy supply, energy-related costs and other costs that are included in certain regulatory commission-approved cost tracking mechanisms. This deferral adjusts expense to match the corresponding revenues compared to the actual costs incurred. Energy supply and energy-related costs are recovered from customers in rates and have no impact on earnings. Amortization expense also includes the amortization of certain costs as those costs are collected in rates.

Amortization increased in 2022, as compared to 2021, due primarily to the deferral adjustment of energy supply, energy-related and other tracked costs at CL&P (included in the non-bypassable component of the FMCC mechanism), and NSTAR Electric, which can fluctuate from period to period based on the timing of costs incurred and related rate changes to recover these costs. The increase in the FMCC mechanism at CL&P was driven primarily by the net costs and benefits of the long-term state approved contracts that Eversource has executed with Millstone and Seabrook, among others. The increase was partially offset by a decrease in storm amortization expense at CL&P related to the completion of the amortization period of certain storm cost deferred assets.

Energy Efficiency Programs expense increased in 2022, as compared to 2021, due primarily to the deferral adjustment, which reflects the actual costs of energy efficiency programs compared to the amounts billed to customers, and the timing of the recovery of energy efficiency costs. The costs for the majority of the state energy policy initiatives and expanded energy efficiency programs are recovered from customers in rates and have no impact on earnings.

Taxes Other Than Income Taxes expense increased in 2022, as compared to 2021, due primarily to an increase in property taxes as a result of higher utility plant balances and higher Connecticut gross earnings taxes.

Interest Expense increased in 2022, as compared to 2021, due primarily to an increase in interest on long-term debt as a result of new debt issuances ($101.3 million), an increase in interest on short-term notes payable ($10.9 million), an increase in interest expense on regulatory deferrals ($6.7 million), and higher amortization of debt discounts and premiums, net ($3.3 million), partially offset by an increase in capitalized AFUDC related to debt funds and other capitalized interest ($20.0 million), lower interest resulting from the 2022 payment of withheld property taxes at NSTAR Electric ($5.0 million), and a decrease in RRB interest expense ($1.4 million).

Other Income, Net increased in 2022, as compared to 2021, due primarily to an increase related to pension, SERP and PBOP non-service income components ($135.4 million), an increase in interest income primarily from regulatory deferrals ($24.9 million), an increase in capitalized AFUDC related to equity funds ($10.0 million), an increase in equity in earnings related to Eversource’s equity method investments ($8.7 million), a gain on the sale of property in 2022 ($2.5 million) and investment income in 2022 compared to investment losses in 2021 driven by market volatility ($2.1 million).

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Income Tax Expense increased in 2022, as compared to 2021, due primarily to higher pre-tax earnings ($61.7 million), higher state taxes ($5.9 million), lower share-based payment excess tax benefits ($1.9 million), an increase in return to provision adjustments ($11.2 million), a decrease in amortization of EDIT ($20.0 million), an increase in valuation allowances ($8.5 million), and an increase in items that impact our tax rate as a result of regulatory treatment (flow-through items) and permanent differences ($0.2 million).

RESULTS OF OPERATIONS –

THE CONNECTICUT LIGHT AND POWER COMPANY

NSTAR ELECTRIC COMPANY AND SUBSIDIARY

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

The following provides the amounts and variances in operating revenues and expense line items in the statements of income for CL&P, NSTAR Electric and PSNH for the years ended December 31, 2022 and 2021 included in this Annual Report on Form 10-K:

	For the Years Ended December 31,
	CL&P						NSTAR Electric						PSNH
(Millions of Dollars)	2022		2021		Increase		2022		2021		Increase/ (Decrease)		2022		2021		Increase/ (Decrease)
Operating Revenues	$	4,817.7	$	3,637.4	$	1,180.3	$	3,583.1	$	3,056.4	$	526.7	$	1,474.8	$	1,177.2	$	297.6
Operating Expenses:
Purchased Power and Transmission	2,110.3		1,393.0		717.3		1,264.8		932.5		332.3		665.5		370.3		295.2
Operations and Maintenance	707.2		644.2		63.0		640.8		563.2		77.6		256.0		237.7		18.3
Depreciation	355.5		338.9		16.6		362.0		337.5		24.5		128.0		120.1		7.9
Amortization of Regulatory Assets, Net	335.6		99.0		236.6		83.9		55.8		28.1		42.9		86.8		(43.9)
Energy Efficiency Programs	134.2		129.6		4.6		332.3		288.6		43.7		37.4		38.7		(1.3)
Taxes Other Than Income Taxes	384.7		363.8		20.9		246.7		216.7		30.0		95.3		91.5		3.8
Total Operating Expenses	4,027.5		2,968.5		1,059.0		2,930.5		2,394.3		536.2		1,225.1		945.1		280.0
Operating Income	790.2		668.9		121.3		652.6		662.1		(9.5)		249.7		232.1		17.6
Interest Expense	169.4		166.1		3.3		162.9		146.0		16.9		59.5		57.0		2.5
Other Income, Net	83.3		30.2		53.1		142.7		74.8		67.9		32.7		14.6		18.1
Income Before Income Tax Expense	704.1		533.0		171.1		632.4		590.9		41.5		222.9		189.7		33.2
Income Tax Expense	171.2		131.3		39.9		140.0		114.3		25.7		51.3		39.4		11.9
Net Income	$	532.9	$	401.7	$	131.2	$	492.4	$	476.6	$	15.8	$	171.6	$	150.3	$	21.3

Operating Revenues

Sales Volumes: A summary of our retail electric GWh sales volumes is as follows:

	For the Years Ended December 31,
	2022	2021	Increase/(Decrease)	Percentage Increase/(Decrease)
CL&P	20,560	20,501	59	0.3	%
NSTAR Electric	22,933	22,727	206	0.9	%
PSNH	7,764	7,782	(18)	(0.2)	%

Fluctuations in retail electric sales volumes at PSNH impact earnings.  For CL&P and NSTAR Electric, fluctuations in retail electric sales volumes do not impact earnings due to their respective regulatory commission-approved distribution revenue decoupling mechanisms.

Operating Revenues: Operating Revenues, which consist of base distribution revenues and tracked revenues further described below, increased $1.18 billion at CL&P, $526.7 million at NSTAR Electric, and $297.6 million at PSNH in 2022, as compared to 2021.

Base Distribution Revenues:

•CL&P's distribution revenues increased $0.4 million.

•NSTAR Electric's distribution revenues increased $36.9 million due primarily to the impact of its base distribution rate increase effective January 1, 2022 resulting from its annual Performance Based Rate Adjustment filing.

•PSNH's distribution revenues increased $6.1 million due primarily to the impact of its base distribution rate increases effective August 1, 2021 and November 1, 2022.

Electric distribution revenues at CL&P also increased $93.4 million in 2022, as compared to 2021, due to the absence of a 2021 reserve established to provide bill credits to customers as a result of CL&P’s settlement agreement on October 1, 2021 and a storm performance penalty assessed by PURA. In the 2021 settlement agreement, CL&P agreed to provide a total of $65 million of customer credits, which were distributed based on customer sales over a two-month period from December 1, 2021 to January 31, 2022. Additionally, CL&P recorded a $28.4 million reserve in 2021 for a civil penalty for non-compliance with storm performance standards that was provided as credits to customers on electric bills beginning on September 1, 2021 over a one-year period.

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Tracked Revenues: Tracked distribution revenues consist of certain costs that are recovered from customers in retail rates through regulatory

commission-approved cost tracking mechanisms and therefore, recovery of these costs has no impact on earnings. Revenues from certain of these

cost tracking mechanisms also include certain incentives earned, return on capital tracking mechanisms, and carrying charges that are billed in

rates to customers, which do impact earnings. Costs recovered through cost tracking mechanisms include, among others, energy supply

procurement and other energy-related costs, retail transmission charges, energy efficiency program costs, electric restructuring and stranded cost

recovery revenues (including securitized RRB charges), certain capital tracking mechanisms for infrastructure improvements, and additionally for NSTAR Electric, pension and PBOP benefits, net metering for distributed generation, and solar-related programs. Tracked revenues also include wholesale market sales transactions, such as sales of energy and energy-related products into the ISO-NE wholesale electricity market and the sale of RECs to various counterparties.

Customers have the choice to purchase electricity from each Eversource electric utility or from a competitive third party supplier. For customers who have contracted separately with these competitive suppliers, revenue is not recorded for the sale of the electricity commodity, as the utility is acting as an agent on behalf of the third party supplier. For customers that choose to purchase electric generation from CL&P, NSTAR Electric or PSNH, each purchases power on behalf of, and is permitted to recover the related energy supply cost without mark-up from, its customers, and records offsetting amounts in revenues and purchased power and amortization expense related to this energy supply procurement. CL&P, NSTAR Electric and PSNH each remain as the distribution service provider for all customers and charge a regulated rate for distribution delivery service recorded in revenues.

Tracked revenues increased/(decreased) in 2022, as compared to 2021, due primarily to the following:

(Millions of Dollars)	CL&P		NSTAR Electric		PSNH
Retail Tariff Tracked Revenues:
Energy supply procurement	$	559.9	$	178.4	$	294.6
Retail transmission	110.6		155.1		(18.9)
CL&P FMCC	(87.8)		—		—
Energy efficiency	7.2		41.9		3.8
Stranded costs	1.1		(14.6)		(59.0)
Other distribution tracking mechanisms	28.2		22.9		(1.3)
Wholesale Market Sales Revenue	464.9		105.8		44.4

The increase in energy supply procurement at CL&P was driven by higher average prices and higher average supply-related sales volumes. The increase in energy supply procurement at NSTAR Electric was driven by higher average prices, partially offset by lower average supply-related sales volumes. The increase in energy supply procurement at PSNH was driven by higher average prices. Fluctuations in retail transmission revenues are driven by the recovery of the costs of our wholesale transmission business, such as those billed by ISO-NE and Local and Regional Network Service charges. For further information, see "Purchased Power and Transmission Expense" below.

The increase in wholesale market sales revenue in 2022, as compared to 2021, was due primarily to higher average electricity market prices received for wholesale sales at CL&P, NSTAR Electric and PSNH. ISO-NE average market prices received for CL&P’s wholesale sales increased approximately 90 percent in 2022, as compared to 2021, driven primarily by higher natural gas prices in New England. The increase at CL&P was also due to higher wholesale sales volumes resulting from the sale of output generated by the Seabrook PPA beginning in the first quarter of 2022. CL&P’s volumes sold into the market were primarily from the sale of output generated by the Millstone PPA and Seabrook PPA that CL&P entered into in 2019, as required by regulation. CL&P sells the energy purchased from Millstone and Seabrook into the wholesale market and uses the proceeds from the energy sales to offset the contract costs. The net sales or net cost amount is refunded to, or recovered from, customers in the non-bypassable component of the CL&P FMCC rate. The increase in wholesale market sales revenues at CL&P, NSTAR Electric and PSNH was also driven by higher proceeds from the sale of transmission rights over a one-year period under Hydro-Quebec transmission support agreements. Proceeds from these sales are credited back to customers.

The decrease in CL&P’s FMCC revenues and PSNH’s stranded cost revenues was driven by decreases in the retail rate, which reflect the net benefit of higher wholesale market sales received in the ISO-NE market for long-term state approved energy contracts at CL&P and PSNH, which are then credited back to customers through these retail rates. The decrease in PSNH’s stranded cost revenues was also due to lower stranded costs to be recovered due to higher Regional Greenhouse Gas Initiative (RGGI) proceeds received, which are credited back to customers.

Transmission Revenues: Transmission revenues increased $61.5 million at CL&P, $73.5 million at NSTAR Electric and $39.1 million at PSNH in 2022, as compared to 2021, due primarily to a higher transmission rate base as a result of our continued investment in our transmission infrastructure.

Eliminations: Eliminations are primarily related to the Eversource electric transmission revenues that are derived from ISO-NE regional transmission charges to the distribution businesses of CL&P, NSTAR Electric and PSNH that recover the costs of the wholesale transmission business in rates charged to their customers. The impact of eliminations decreased revenues by $60.8 million at CL&P, $78.6 million at NSTAR Electric and $12.9 million at PSNH in 2022, as compared to 2021.

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Purchased Power and Transmission expense includes costs associated with purchasing electricity on behalf of CL&P, NSTAR Electric and PSNH's customers and the cost of energy purchase contracts, as required by regulation.  These energy supply and other energy-related costs are recovered from customers in rates through commission-approved cost tracking mechanisms, which have no impact on earnings (tracked costs). Purchased Power and Transmission expense increased in 2022, as compared to 2021, due primarily to the following:

(Millions of Dollars)	CL&P		NSTAR Electric		PSNH
Purchased Power Costs	$	650.6	$	255.5	$	311.4
Transmission Costs	125.1		155.4		(3.4)
Eliminations	(58.4)		(78.6)		(12.8)
Total Purchased Power and Transmission	$	717.3	$	332.3	$	295.2

Purchased Power Costs: Included in purchased power costs are the costs associated with providing electric generation service supply to all customers who have not migrated to third party suppliers and the cost of energy purchase contracts, as required by regulation.

•The increase at CL&P was due primarily to higher energy supply procurement costs resulting from higher average prices and higher average supply-related volumes. The increase was also due to higher long-term contractual energy-related costs and higher net metering costs that are recovered in the non-bypassable component of the FMCC mechanism.

•The increase at NSTAR Electric was due primarily to higher energy supply procurement costs resulting from higher average prices, partially offset by lower supply-related sales volumes. The increase was also due to higher net metering costs.

•The increase at PSNH was due primarily to higher energy supply procurement costs resulting from higher average prices.

Transmission Costs: Included in transmission costs are charges that recover the cost of transporting electricity over high-voltage lines from generation facilities to substations, including costs allocated by ISO-NE to maintain the wholesale electric market.

•The increase in transmission costs at CL&P was due primarily to an increase resulting from the retail transmission cost deferral, which reflects the actual cost of transmission service compared to estimated amounts billed to customers. This was partially offset by a decrease in Local Network Service charges, which reflect the cost of transmission service provided by Eversource over our local transmission network, and a decrease in costs billed by ISO-NE that support regional grid investments.

•The increase in transmission costs at NSTAR Electric was due primarily to an increase resulting from the retail transmission cost deferral, an increase in Local Network Service charges, and an increase in costs billed by ISO-NE.

•The decrease in transmission costs at PSNH was due primarily to a decrease in costs billed by ISO-NE and a decrease in Local Network Service charges, partially offset by an increase resulting from the retail transmission cost deferral.

Operations and Maintenance expense includes tracked costs and costs that are part of base distribution rates with changes impacting earnings (non-tracked costs).  Operations and Maintenance expense increased in 2022, as compared to 2021, due primarily to the following:

(Millions of Dollars)	CL&P		NSTAR Electric		PSNH
Base Electric Distribution (Non-Tracked Costs):
General costs (including vendor services in corporate areas, insurance, fees and assessments)	$	12.3	$	8.8	$	5.7
Shared corporate costs (including computer software depreciation at Eversource Service)	8.7		13.2		3.1
Storm costs	9.0		9.5		3.5
Commitment to energy assistance program as part of CL&P rate relief plan	10.0		—		—
Operations-related expenses (including vegetation management, vendor services and vehicles)	3.1		2.2		(0.9)
Absence in 2022 of CL&P charge to fund various customer assistance initiatives associated with the settlement agreement on October 1, 2021	(10.0)		—		—
Employee-related expenses, including labor and benefits	(1.5)		(11.0)		0.5
Other non-tracked operations and maintenance	5.6		15.8		(1.1)
Total Base Electric Distribution (Non-Tracked Costs)	37.2		38.5		10.8
Tracked Costs:
Transmission expenses	19.4		7.4		8.3
Other tracked operations and maintenance	6.4		31.7		(0.8)
Total Tracked Costs	25.8		39.1		7.5
Total Operations and Maintenance	$	63.0	$	77.6	$	18.3

Depreciation expense increased in 2022, as compared to 2021, for CL&P, NSTAR Electric and PSNH due to higher net plant in service balances.

Amortization of Regulatory Assets, Net expense includes the deferral of energy supply, energy-related costs and other costs that are included in certain regulatory-approved cost tracking mechanisms. This deferral adjusts expense to match the corresponding revenues compared to the actual costs incurred. Energy supply and energy-related costs are recovered from customers in rates and have no impact on earnings. Amortization expense also includes the amortization of certain costs as those costs are collected in rates. Amortization of Regulatory Assets, Net increased/decreased in 2022, as compared to 2021, due primarily to the following:

•The increase at CL&P was due primarily to the deferral adjustment of energy supply, energy-related and other tracked costs that are included in the non-bypassable component of the FMCC mechanism, which can fluctuate from period to period based on the timing of

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costs incurred and related rate changes to recover these costs. The increase in the FMCC mechanism was driven primarily by the net costs and benefits of the long-term state approved contracts that CL&P executed with Millstone and Seabrook, among others. The increase was partially offset by a decrease in storm amortization expense related to the completion of the amortization period of certain storm cost deferred assets.

•The increase at NSTAR Electric was due to the deferral adjustment of energy supply, energy-related costs and other tracked costs.

•The decrease at PSNH was due to the deferral adjustment of energy-related and other tracked costs.

Energy Efficiency Programs expense includes costs of various state energy policy initiatives and expanded energy efficiency programs that are recovered from customers in rates, most of which have no impact on earnings. Energy Efficiency Programs expense increased/decreased in 2022, as compared to 2021, due primarily to the following:

•The increases at CL&P and NSTAR Electric were due to the deferral adjustment, which reflects actual costs of energy efficiency programs compared to the estimated amounts billed to customers, and the timing of the recovery of energy efficiency costs.

•The decrease at PSNH was due to the deferral adjustment and the timing of the recovery of energy efficiency costs.

Taxes Other Than Income Taxes increased in 2022, as compared to 2021, due primarily to the following:

•The increase at CL&P was related to higher property taxes as a result of a higher utility plant balance and higher gross earnings taxes.

•The increases at NSTAR Electric and PSNH were due to higher property taxes as a result of higher utility plant balances.

Interest Expense increased in 2022, as compared to 2021, due primarily to the following:

•The increase at CL&P was due primarily to an increase in interest expense on regulatory deferrals ($3.4 million), higher interest on long-term debt ($0.8 million), and higher amortization of debt discounts and premiums, net ($0.3 million), partially offset by an increase in capitalized AFUDC related to debt funds ($1.9 million).

•The increase at NSTAR Electric was due primarily to higher interest on long-term debt ($19.9 million), an increase in interest expense on regulatory deferrals ($3.0 million), and higher amortization of debt discounts and premiums, net ($0.5 million), partially offset by lower interest resulting from the 2022 payment of withheld property taxes ($5.0 million), and an increase in capitalized AFUDC related to debt funds ($1.7 million).

•The increase at PSNH was due primarily to higher interest expense on regulatory deferrals ($3.2 million), higher interest on short-term notes payable ($2.1 million), higher interest on long-term debt ($0.6 million), partially offset by lower amortization of debt discounts and premiums, net ($1.6 million), a decrease in RRB interest expense ($1.4 million), and an increase in capitalized AFUDC related to debt funds ($0.6 million).

Other Income, Net increased in 2022, as compared to 2021, due primarily to the following:

•The increase at CL&P was due primarily to an increase related to pension, SERP and PBOP non-service income components ($49.2 million), an increase in capitalized AFUDC related to equity funds ($5.9 million) and an increase in interest income primarily on regulatory deferrals ($0.6 million), partially offset by investment losses in 2022 compared to investment income in 2021 driven by market volatility ($2.6 million).

•The increase at NSTAR Electric was due primarily to an increase related to pension, SERP and PBOP non-service income components ($45.3 million), an increase in interest income primarily on regulatory deferrals ($17.3 million), an increase in capitalized AFUDC related to equity funds ($4.2 million) and an increase in investment income ($1.1 million).

•The increase at PSNH was due primarily to an increase related to pension, SERP and PBOP non-service income components ($16.5 million), an increase in capitalized AFUDC related to equity funds ($0.9 million) and an increase in interest income primarily on regulatory deferrals ($0.7 million).

Income Tax Expense increased in 2022, as compared to 2021, due primarily to the following:

•The increase at CL&P was due primarily to higher pre-tax earnings ($36.0 million), higher state taxes ($2.3 million), an increase in valuation allowances ($8.0 million), a decrease in amortization of EDIT ($0.6 million) and lower share-based payment excess tax benefits ($0.8 million), partially offset by lower return to provision adjustments ($6.3 million) and a decrease in items that impact our tax rate as a result of regulatory treatment (flow-through items) and permanent differences ($1.5 million).

•The increase at NSTAR Electric was due primarily to a decrease in amortization of EDIT ($14.0 million), an increase in pre-tax earnings ($8.7 million), higher state taxes ($2.8 million), and lower share-based payment excess tax benefits ($0.6 million), partially offset by a decrease in items that impact our tax rate as a result of regulatory treatment (flow-through items) and permanent differences ($0.4 million).

•The increase at PSNH was due primarily to higher pre-tax earnings ($6.9 million), higher state taxes ($3.2 million), a decrease in amortization of EDIT ($2.8 million), and an increase in items that impact our tax rate as a result of regulatory treatment (flow-through items) and permanent differences ($1.3 million), partially offset by a decrease in return to provision adjustments ($2.3 million).

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EARNINGS SUMMARY

CL&P's earnings increased $131.2 million in 2022, as compared to 2021, due primarily to the absence in 2022 of the October 1, 2021 settlement agreement that resulted in a $75 million pre-tax charge to earnings and a $28.6 million pre-tax charge to earnings for a 2021 storm performance penalty imposed by PURA as a result of CL&P’s preparation for, and response to, Tropical Storm Isaias. The after-tax impact of the settlement agreement and storm performance penalty imposed by PURA was $86.1 million. Earnings were also favorably impacted by higher earnings from its capital tracking mechanism due to increased electric system improvements, an increase in transmission earnings driven by a higher transmission rate base and lower pension plan expense. The earnings increase was partially offset by higher operations and maintenance expense driven primarily by a $10 million pre-tax charge to earnings as a result of CL&P’s commitment to contribute to an energy assistance program as part of its 2022 rate relief plan, higher storm costs, higher shared corporate costs resulting from the implementation of new information technology systems and higher insurance reserves, as well as higher depreciation expense and higher property and other tax expense.

NSTAR Electric's earnings increased $15.8 million in 2022, as compared to 2021, due primarily to the base distribution rate increase effective January 1, 2022, an increase in transmission earnings driven by a higher transmission rate base, and an increase in interest income primarily on regulatory deferrals. The earnings increase was partially offset by higher operations and maintenance expense driven primarily by higher shared corporate costs resulting from the implementation of new information technology systems and higher storm costs, as well as higher property tax expense, higher depreciation expense, and higher interest expense.

PSNH's earnings increased $21.3 million in 2022, as compared to 2021, due primarily to an increase in transmission earnings driven by a higher transmission rate base, lower pension plan expense, and the base distribution rate increases effective August 1, 2021 and November 1, 2022. The earnings increase was partially offset by higher operations and maintenance expense driven primarily by higher storm costs and higher shared corporate costs resulting from the implementation of new information technology systems, the absence in 2022 of a favorable impact of a new tracker mechanism at PSNH approved as part of the 2020 rate settlement agreement that was recorded in 2021, and higher depreciation expense.

LIQUIDITY

Cash Flows: CL&P had cash flows provided by operating activities of $869.6 million in 2022, as compared to $612.9 million in 2021.  The increase in operating cash flows was due primarily to an increase in regulatory over-recoveries driven by the timing of collections for the non-bypassable FMCC and other regulatory tracking mechanisms, the timing of cash payments made on our accounts payable, the absence in 2022 of pension contributions of $98.9 million made in 2021, an increase in earnings after adjustment for non-cash items primarily due to higher revenues, and a $24.2 million decrease in cost of removal expenditures. The impact of regulatory collections are included in both Regulatory Over/Under Recoveries and Amortization of Regulatory Assets on the statements of cash flows. These favorable impacts were partially offset by the timing of cash collections on our accounts receivable, a $79.2 million increase in income tax payments made in 2022, as compared to 2021, $72.0 million of customer credits distributed in 2022 as a result of the October 2021 settlement agreement and the 2021 storm performance penalty for CL&P’s response to Tropical Storm Isaias, and the timing of other working capital items.

NSTAR Electric had cash flows provided by operating activities of $771.5 million in 2022, as compared to $700.9 million in 2021.  The increase in operating cash flows was due primarily to an increase in earnings after adjustment for non-cash items primarily due to higher revenues, a decrease in regulatory under-recoveries driven by the timing of collections for regulatory tracking mechanisms, a $50.4 million decrease in income tax payments made in 2022, as compared to 2021, the timing of cash collections on our accounts receivable, a $15.0 million decrease in pension contributions made in 2022, as compared to 2021, and the timing of other working capital items. The impact of regulatory collections are included in both Regulatory Over/Under Recoveries and Amortization of Regulatory Assets on the statements of cash flows. These favorable impacts were partially offset by $76.3 million of payments in 2022 related to withheld property taxes, a $34.0 million increase in cash payments for storm costs, and the timing of cash payments made on our accounts payable.

PSNH had cash flows provided by operating activities of $361.5 million in 2022, as compared to $336.1 million in 2021.  The increase in operating cash flows was due primarily to the timing of cash payments made on our accounts payable and an increase in earnings after adjustment for non-cash items primarily due to higher revenues. These favorable impacts were partially offset by the timing of cash collections on our accounts receivable, a decrease in regulatory over-recoveries driven by the timing of collections for regulatory tracking mechanisms, the timing of other working capital items, a $9.1 million increase in cost of removal expenditures, and a $7.2 million increase in income tax payments made in 2022, as compared to 2021. The impact of regulatory collections are included in both Regulatory Over/Under Recoveries and Amortization of Regulatory Assets on the statements of cash flows.

For further information on CL&P's, NSTAR Electric's and PSNH's liquidity and capital resources, see "Liquidity" and "Business Development and Capital Expenditures" included in this Management's Discussion and Analysis of Financial Condition and Results of Operations.

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Item 7A.    Quantitative and Qualitative Disclosures about Market Risk

Market Risk Information

Commodity Price Risk Management:  Our regulated companies enter into energy contracts to serve our customers, and the economic impacts of those contracts are passed on to our customers.  Accordingly, the regulated companies have no exposure to loss of future earnings or fair values due to these market risk-sensitive instruments.  Eversource's Energy Supply Risk Committee, comprised of senior officers, reviews and approves all large-scale energy related transactions entered into by its regulated companies.

Other Risk Management Activities

We have an Enterprise Risk Management (ERM) program for identifying the principal risks of the Company.  Our ERM program involves the application of a well-defined, enterprise-wide methodology designed to allow our Risk Committee, comprised of our senior officers of the Company, to identify, categorize, prioritize, and mitigate the principal risks to the Company.  The ERM program is integrated with other assurance functions throughout the Company including Compliance, Auditing, and Insurance to ensure appropriate coverage of risks that could impact the Company.  In addition to known risks, ERM identifies emerging risks to the Company, through participation in industry groups, discussions with management and in consultation with outside advisers.  Our management then analyzes risks to determine materiality, likelihood and impact, and develops mitigation strategies.  Management broadly considers our business model, the utility industry, the global economy, climate change, sustainability and the current environment to identify risks.  The Finance Committee of the Board of Trustees is responsible for oversight of the Company's ERM program and enterprise-wide risks as well as specific risks associated with insurance, credit, financing, investments, pensions and overall system security including cyber security.  The findings of the ERM process are periodically discussed with the Finance Committee of our Board of Trustees, as well as with other Board Committees or the full Board of Trustees, as appropriate, including reporting on how these issues are being measured and managed.  However, there can be no assurances that the ERM process will identify or manage every risk or event that could impact our financial position, results of operations or cash flows.

Interest Rate Risk Management:  We manage our interest rate risk exposure in accordance with our written policies and procedures by maintaining a mix of fixed and variable rate long-term debt.  As of December 31, 2022, approximately 98 percent of our long-term debt was at a fixed interest rate. The remaining long-term debt is at variable interest rates and is subject to interest rate risk that could result in earnings volatility. Assuming a one percentage point increase in our variable interest rates, annual interest expense would have increased by a pre-tax amount of $3.5 million.

Credit Risk Management:  Credit risk relates to the risk of loss that we would incur as a result of non-performance by counterparties pursuant to the terms of our contractual obligations.  We serve a wide variety of customers and transact with suppliers that include IPPs, industrial companies, natural gas and electric utilities, oil and natural gas producers, financial institutions, and other energy marketers.  Margin accounts exist within this diverse group, and we realize interest receipts and payments related to balances outstanding in these margin accounts.  This wide customer and supplier mix generates a need for a variety of contractual structures, products and terms that, in turn, require us to manage the portfolio of market risk inherent in those transactions in a manner consistent with the parameters established by our risk management process.

Our regulated companies are subject to credit risk from certain long-term or high-volume supply contracts with energy marketing companies.  Our regulated companies manage the credit risk with these counterparties in accordance with established credit risk practices and monitor contracting risks, including credit risk.  As of December 31, 2022, our regulated companies held collateral (letters of credit or cash) of $32 million from counterparties related to our standard service contracts. As of December 31, 2022, Eversource had $35.7 million of cash posted with ISO-NE related to energy transactions. For further information on cash collateral deposited and posted with counterparties, see Note 1M, "Summary of Significant Accounting Policies - Supplemental Cash Flow Information," to the financial statements.

If the respective unsecured debt ratings of Eversource or its subsidiaries were reduced to below investment grade by either Moody's, S&P or Fitch, certain of Eversource's contracts would require additional collateral in the form of cash or letters of credit to be provided to counterparties and independent system operators.  Eversource would have been and remains able to provide that collateral.  

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Item 8.    Financial Statements and Supplementary Data

Eversource
	Management’s Report on Internal Controls Over Financial Reporting
	Reports of Independent Registered Public Accounting Firm (PCAOB ID No. 34)
	Consolidated Financial Statements
CL&P
	Management’s Report on Internal Controls Over Financial Reporting
	Report of Independent Registered Public Accounting Firm (PCAOB ID No. 34)
	Financial Statements
NSTAR Electric
	Management’s Report on Internal Controls Over Financial Reporting
	Report of Independent Registered Public Accounting Firm (PCAOB ID No. 34)
	Consolidated Financial Statements
PSNH
	Management’s Report on Internal Controls Over Financial Reporting
	Report of Independent Registered Public Accounting Firm (PCAOB ID No. 34)
	Consolidated Financial Statements

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Management’s Report on Internal Controls Over Financial Reporting

Eversource Energy

Management is responsible for the preparation, integrity, and fair presentation of the accompanying consolidated financial statements of Eversource Energy and subsidiaries (Eversource or the Company) and of other sections of this annual report.  Eversource's internal controls over financial reporting were audited by Deloitte & Touche LLP.

Management is responsible for establishing and maintaining adequate internal controls over financial reporting.  The Company's internal control framework and processes have been designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America.  There are inherent limitations of internal controls over financial reporting that could allow material misstatements due to error or fraud to occur and not be prevented or detected on a timely basis by employees during the normal course of business.  Additionally, internal controls over financial reporting may become inadequate in the future due to changes in the business environment.  

Under the supervision and with the participation of the principal executive officer and principal financial officer, Eversource conducted an evaluation of the effectiveness of internal controls over financial reporting based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).  Based on this evaluation under the framework in COSO, management concluded that internal controls over financial reporting were effective as of December 31, 2022.

February 15, 2023

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Trustees and Shareholders of Eversource Energy:

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Eversource Energy and subsidiaries (the “Company”) as of December 31, 2022, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2022, of the Company and our report dated February 15, 2023, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Controls Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Deloitte & Touche LLP

Hartford, Connecticut

February 15, 2023

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Trustees and Shareholders of Eversource Energy:

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Eversource Energy and subsidiaries (the “Company”) as of December 31, 2022 and 2021, the related consolidated statements of income, comprehensive income, common shareholders’ equity, and cash flows, for each of the three years in the period ended December 31, 2022, and the related notes and the schedules listed in the Index at Item 15 of Part IV (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2022 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2022, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 15, 2023, expressed an unqualified opinion on the Company’s internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Regulatory Accounting - Impact of Rate Regulation on the Financial Statements - Refer to Note 2 to the Financial Statements

Critical Audit Matter Description

The Company’s utility companies are subject to rate regulation by the Federal Energy Regulatory Commission and by their respective state public utility authorities in Connecticut, Massachusetts, or New Hampshire (the “Commissions”). The rate regulation by these Commissions is based on cost recovery. The regulated companies’ financial statements reflect the effects of the rate-making process. The rates charged to the customers of the Company’s regulated companies are designed to collect each company’s cost 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. In some cases, the Company records regulatory assets before approval for recovery has been received from the applicable regulatory commission. The Company must use judgment to conclude that costs deferred as regulatory assets are probable of future recovery. The Company bases its conclusion on certain factors, including, but not limited to, regulatory precedent. Regulatory liabilities represent either revenues received from customers to fund expected costs that have not yet been incurred or probable future refunds to customers.

The Company uses judgment when recording regulatory assets and liabilities; however, regulatory commissions can reach different conclusions about the recovery of costs, and those conclusions could have a material impact on the Company’s financial statements. Management believes it is probable that each of the regulated companies will recover its respective investment in long-lived assets, including regulatory assets. If management were to determine that it could no longer apply the accounting guidance applicable to rate-regulated enterprises to any of the regulated companies’ operations, or if management could not conclude it is probable that costs would be recovered from customers in future rates, the costs would be charged to net income in the period in which the determination is made.

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Accounting for the economics of rate-regulation impacts multiple financial statement line items and disclosures, such as regulated property, plant, and equipment, regulatory assets and liabilities, operating revenues, depreciation expense and amortization of regulatory assets. While management has indicated it expects to recover costs from customers through regulated rates, there is a risk that the Commissions will not approve full recovery of such costs or full recovery of all amounts invested in the utility business and a reasonable return on that investment. We identified the impact of rate-regulation as a critical audit matter due to the significant judgments made by management to support its assertions about impact of future regulatory orders on the financial statements. Management judgments include assessing the probability of recovery in future rates of incurred costs and of a refund to customers. Given that management’s accounting judgments are based on assumptions about the outcome of future decisions by the Commissions, auditing these judgments requires specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the uncertainty of future decisions by the Commissions included the following, among others:

• We tested the effectiveness of management’s controls over the evaluation of the likelihood of (1) the recovery in future rates of costs incurred as property, plant, and equipment and deferred as regulatory assets, and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We tested the effectiveness of management’s controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; and the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates, a refund, or a future reduction in rates.

• We evaluated the Company’s disclosures related to the applicability and impacts of rate regulation, including the balances recorded and regulatory developments disclosed in the financial statements.

• We read relevant regulatory orders issued by the Commissions for the Company and other public utilities, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other publicly available information to assess the likelihood of recovery in future rates or of a future refund or reduction in rates based on precedents of the Commissions’ treatment of similar costs under similar circumstances. We evaluated the external information and compared it to management’s recorded regulatory asset and liability balances for completeness.

• For regulatory matters in process, we inspected the Company’s filings with the Commissions and the filings with the Commissions by intervenors that may impact the Company’s future rates, for any evidence that might contradict management’s assertions.

• We made inquiries of management, including legal counsel, and obtained the regulatory orders and analysis from management that support the probability of recovery, refund, or future reductions in rates for regulatory assets and liabilities to assess management’s assertion that amounts are probable of recovery, refund, or a future reduction in rates.

/s/ Deloitte & Touche LLP

Hartford, Connecticut

February 15, 2023

We have served as the Company’s auditor since 2002.

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EVERSOURCE ENERGY AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

	As of December 31,
(Thousands of Dollars)	2022		2021
ASSETS
Current Assets:
Cash	$	47,597	$	66,773
Cash Equivalents	327,006		—
Receivables, Net (net of allowance for uncollectible accounts of $486,297 and $417,406 as of December 31, 2022 and    2021, respectively)	1,517,138		1,226,069
Unbilled Revenues	238,968		210,879
Materials, Supplies, Natural Gas and REC Inventory	374,395		267,547
Regulatory Assets	1,335,491		1,129,093
Prepayments and Other Current Assets	382,603		369,759
Total Current Assets	4,223,198		3,270,120
Property, Plant and Equipment, Net	36,112,820		33,377,650
Deferred Debits and Other Assets:
Regulatory Assets	4,242,794		4,586,709
Goodwill	4,522,632		4,477,269
Investments in Unconsolidated Affiliates	2,176,080		1,436,293
Prepaid Pension and PBOP	1,045,524		271,987
Marketable Securities	366,508		460,347
Other Long-Term Assets	541,344		611,769
Total Deferred Debits and Other Assets	12,894,882		11,844,374
Total Assets	$	53,230,900	$	48,492,144
LIABILITIES AND CAPITALIZATION
Current Liabilities:
Notes Payable	$	1,442,200	$	1,505,450
Long-Term Debt – Current Portion	1,320,129		1,193,097
Rate Reduction Bonds – Current Portion	43,210		43,210
Accounts Payable	2,113,905		1,672,230
Regulatory Liabilities	890,786		602,432
Other Current Liabilities	989,053		830,620
Total Current Liabilities	6,799,283		5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,067,902		4,597,120
Regulatory Liabilities	3,930,305		3,866,251
Derivative Liabilities	143,929		235,387
Asset Retirement Obligations	502,713		500,111
Accrued Pension, SERP and PBOP	135,473		242,463
Other Long-Term Liabilities	888,081		971,080
Total Deferred Credits and Other Liabilities	10,668,403		10,412,412
Long-Term Debt	19,723,994		17,023,577
Rate Reduction Bonds	410,492		453,702
Noncontrolling Interest - Preferred Stock of Subsidiaries	155,570		155,570
Common Shareholders' Equity:
Common Shares	1,799,920		1,789,092
Capital Surplus, Paid In	8,401,731		8,098,514
Retained Earnings	5,527,153		5,005,391
Accumulated Other Comprehensive Loss	(39,421)		(42,275)
Treasury Stock	(216,225)		(250,878)
Common Shareholders' Equity	15,473,158		14,599,844
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$	53,230,900	$	48,492,144

The accompanying notes are an integral part of these consolidated financial statements.

61

EVERSOURCE ENERGY AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

	For the Years Ended December 31,
(Thousands of Dollars, Except Share Information)	2022		2021		2020
Operating Revenues	$	12,289,336	$	9,863,085	$	8,904,430
Operating Expenses:
Purchased Power, Purchased Natural Gas and Transmission	5,014,074		3,372,344		2,987,840
Operations and Maintenance	1,865,328		1,739,685		1,480,252
Depreciation	1,194,246		1,103,008		981,380
Amortization	448,892		231,965		177,679
Energy Efficiency Programs	658,051		592,775		535,760
Taxes Other Than Income Taxes	910,591		829,987		752,785
Total Operating Expenses	10,091,182		7,869,764		6,915,696
Operating Income	2,198,154		1,993,321		1,988,734
Interest Expense	678,274		582,334		538,452
Other Income, Net	346,088		161,282		108,590
Income Before Income Tax Expense	1,865,968		1,572,269		1,558,872
Income Tax Expense	453,574		344,223		346,186
Net Income	1,412,394		1,228,046		1,212,686
Net Income Attributable to Noncontrolling Interests	7,519		7,519		7,519
Net Income Attributable to Common Shareholders	$	1,404,875	$	1,220,527	$	1,205,167
Basic Earnings Per Common Share	$	4.05	$	3.55	$	3.56
Diluted Earnings Per Common Share	$	4.05	$	3.54	$	3.55
Weighted Average Common Shares Outstanding:
Basic	346,783,444		343,972,926		338,836,147
Diluted	347,246,768		344,631,056		339,847,062

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Net Income	$	1,412,394	$	1,228,046	$	1,212,686
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	20		972		1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)		(671)		342
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	4,470		33,835		(13,290)
Other Comprehensive Income/(Loss), Net of Tax	2,854		34,136		(11,352)
Comprehensive Income Attributable to Noncontrolling Interests	(7,519)		(7,519)		(7,519)
Comprehensive Income Attributable to Common Shareholders	$	1,407,729	$	1,254,663	$	1,193,815

The accompanying notes are an integral part of these consolidated financial statements.

62

EVERSOURCE ENERGY AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY

	Common Shares			Capital Surplus, Paid In		Retained Earnings		Accumulated Other Comprehensive Loss		Treasury Stock		Total Common Shareholders' Equity
(Thousands of Dollars, Except Share Information)	Shares	Amount
Balance as of January 1, 2020	329,880,645	$	1,729,292	$	7,087,768	$	4,177,048	$	(65,059)	$	(299,055)	$	12,629,994
Net Income						1,212,686						1,212,686
Dividends on Common Shares - $2.27 Per Share						(767,500)						(767,500)
Dividends on Preferred Stock						(7,519)						(7,519)
Issuance of Common Shares - $5 par value	11,960,000	59,800		889,860								949,660
Long-Term Incentive Plan Activity				7,890								7,890
Issuance of Treasury Shares	1,113,378			50,812						21,076		71,888
Capital Stock Expense				(20,667)								(20,667)
Adoption of Accounting Standards Update 2016-13						(1,514)						(1,514)
Other Comprehensive Loss								(11,352)				(11,352)
Balance as of December 31, 2020	342,954,023	1,789,092		8,015,663		4,613,201		(76,411)		(277,979)		14,063,566
Net Income						1,228,046						1,228,046
Dividends on Common Shares - $2.41 Per Share						(828,337)						(828,337)
Dividends on Preferred Stock						(7,519)						(7,519)
Long-Term Incentive Plan Activity				3,537								3,537
Issuance of Treasury Shares	986,656			49,913						18,451		68,364
Issuance of Treasury Shares for Acquisition of   New England Service Company	462,517			29,401						8,650		38,051
Other Comprehensive Income								34,136				34,136
Balance as of December 31, 2021	344,403,196	1,789,092		8,098,514		5,005,391		(42,275)		(250,878)		14,599,844
Net Income						1,412,394						1,412,394
Dividends on Common Shares - $2.55 Per Share						(883,113)						(883,113)
Dividends on Preferred Stock						(7,519)						(7,519)
Issuance of Common Shares - $5 par value	2,165,671	10,828		189,077								199,905
Long-Term Incentive Plan Activity				8,335								8,335
Issuance of Treasury Shares	949,724			53,822						17,350		71,172
Capital Stock Expense				(2,847)								(2,847)
Issuance of Treasury Shares for Acquisition of   The Torrington Water Company	925,264			54,830						17,303		72,133
Other Comprehensive Income								2,854				2,854
Balance as of December 31, 2022	348,443,855	$	1,799,920	$	8,401,731	$	5,527,153	$	(39,421)	$	(216,225)	$	15,473,158

The accompanying notes are an integral part of these consolidated financial statements.

63

EVERSOURCE ENERGY AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Operating Activities:
Net Income	$	1,412,394	$	1,228,046	$	1,212,686
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	1,194,246		1,103,008		981,380
Deferred Income Taxes	346,779		347,056		257,154
Uncollectible Expense	61,876		60,886		53,461
Pension, SERP and PBOP (Income)/Expense, Net	(160,857)		(14,693)		12,888
Pension and PBOP Contributions	(83,148)		(182,344)		(111,524)
Regulatory Under Recoveries, Net	(205,294)		(314,211)		(516,411)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and   Storm Performance Penalty	(72,041)		81,274		—
Amortization	448,892		231,965		177,679
Cost of Removal Expenditures	(303,755)		(242,130)		(148,332)
Payment of Withheld Property Taxes	(78,446)		—		—
Other	(39,192)		(64,640)		(25,957)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(470,593)		(135,505)		(351,843)
Taxes Receivable/Accrued, Net	18,358		(110,621)		43,819
Accounts Payable	377,657		(29,201)		122,567
Other Current Assets and Liabilities, Net	(45,583)		3,710		(24,995)
Net Cash Flows Provided by Operating Activities	2,401,293		1,962,600		1,682,572
Investing Activities:
Investments in Property, Plant and Equipment	(3,441,852)		(3,175,080)		(2,942,996)
Proceeds from Sales of Marketable Securities	457,612		447,893		434,124
Purchases of Marketable Securities	(424,174)		(414,980)		(401,823)
Acquisition of Assets of Columbia Gas of Massachusetts, Net of Restricted Cash	—		—		(1,113,252)
Investments in Unconsolidated Affiliates	(742,496)		(327,385)		(239,673)
Proceeds from the Sale of Hingham Water System	—		—		110,536
Other Investing Activities	20,420		22,178		23,809
Net Cash Flows Used in Investing Activities	(4,130,490)		(3,447,374)		(4,129,275)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	197,058		—		928,992
Cash Dividends on Common Shares	(860,033)		(805,439)		(744,665)
Cash Dividends on Preferred Stock	(7,519)		(7,519)		(7,519)
(Decrease)/Increase in Notes Payable	(78,170)		256,125		13,955
Repayment of Rate Reduction Bonds	(43,210)		(43,210)		(43,210)
Issuance of Long-Term Debt	4,045,000		3,230,000		2,760,000
Retirement of Long-Term Debt	(1,175,000)		(1,142,500)		(327,236)
Other Financing Activities	(48,185)		(46,625)		14,273
Net Cash Flows Provided by Financing Activities	2,029,941		1,440,832		2,594,590
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	300,744		(43,942)		147,887
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	221,008		264,950		117,063
Cash, Cash Equivalents and Restricted Cash - End of Year	$	521,752	$	221,008	$	264,950

The accompanying notes are an integral part of these consolidated financial statements.

64

Management’s Report on Internal Controls Over Financial Reporting

The Connecticut Light and Power Company

Management is responsible for the preparation, integrity, and fair presentation of the accompanying financial statements of The Connecticut Light and Power Company (CL&P or the Company) and of other sections of this annual report.  

Management is responsible for establishing and maintaining adequate internal controls over financial reporting.  The Company's internal control framework and processes have been designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America.  There are inherent limitations of internal controls over financial reporting that could allow material misstatements due to error or fraud to occur and not be prevented or detected on a timely basis by employees during the normal course of business.  Additionally, internal controls over financial reporting may become inadequate in the future due to changes in the business environment.  

Under the supervision and with the participation of the principal executive officer and principal financial officer, CL&P conducted an evaluation of the effectiveness of internal controls over financial reporting based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).  Based on this evaluation under the framework in COSO, management concluded that internal controls over financial reporting were effective as of December 31, 2022.

February 15, 2023

65

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholder of The Connecticut Light and Power Company:

Opinion on the Financial Statements

We have audited the accompanying balance sheets of The Connecticut Light and Power Company (the “Company”) as of December 31, 2022 and 2021, the related statements of income, comprehensive income, common stockholder’s equity, and cash flows, for each of the three years in the period ended December 31, 2022, and the related notes and the schedule listed in the Index at Item 15 of Part IV (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2022 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2022, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Regulatory Accounting - Impact of Rate Regulation on the Financial Statements - Refer to Note 2 to the Financial Statements

Critical Audit Matter Description

The Company is subject to rate regulation by the Federal Energy Regulatory Commission and the state public utility authority in Connecticut (the “Commissions”). The rate regulation by these Commissions is based on cost recovery. The Company’s financial statements reflect the effects of the rate-making process. The rates charged to the customers are designed to collect the Company’s cost 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. In some cases, the Company records regulatory assets before approval for recovery has been received from the applicable regulatory commission. The Company must use judgment to conclude that costs deferred as regulatory assets are probable of future recovery. The Company bases its conclusion on certain factors, including, but not limited to, regulatory precedent. Regulatory liabilities represent either revenues received from customers to fund expected costs that have not yet been incurred or probable future refunds to customers.

The Company uses judgment when recording regulatory assets and liabilities; however, regulatory commissions can reach different conclusions about the recovery of costs, and those conclusions could have a material impact on the Company’s financial statements. Management believes it is probable that the Company will recover its investment in long-lived assets, including regulatory assets. If management were to determine that it could no longer apply the accounting guidance applicable to rate-regulated enterprises to the Company’s operations, or if management could not conclude it is probable that costs would be recovered from customers in future rates, the costs would be charged to net income in the period in which the determination is made.

66

Accounting for the economics of rate-regulation impacts multiple financial statement line items and disclosures, such as regulated property, plant, and equipment, regulatory assets and liabilities, operating revenues, depreciation expense and amortization of regulatory assets. While management has indicated it expects to recover costs from customers through regulated rates, there is a risk that the Commissions will not approve full recovery of such costs or full recovery of all amounts invested in the Company and a reasonable return on that investment. We identified the impact of rate-regulation as a critical audit matter due to the significant judgments made by management to support its assertions about impact of future regulatory orders on the financial statements. Management judgments include assessing the probability of recovery in future rates of incurred costs and of a refund to customers. Given that management’s accounting judgments are based on assumptions about the outcome of future decisions by the Commissions, auditing these judgments requires specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the uncertainty of future decisions by the Commissions included the following, among others:

• We tested the effectiveness of management’s controls over the evaluation of the likelihood of (1) the recovery in future rates of costs incurred as property, plant, and equipment and deferred as regulatory assets, and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We tested the effectiveness of management’s controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; and the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates, a refund, or a future reduction in rates.

• We evaluated the Company’s disclosures related to the applicability and impacts of rate regulation, including the balances recorded and regulatory developments disclosed in the financial statements.

• We read relevant regulatory orders issued by the Commissions for the Company and other public utilities, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other publicly available information to assess the likelihood of recovery in future rates or of a future refund or reduction in rates based on precedents of the Commissions’ treatment of similar costs under similar circumstances. We evaluated the external information and compared it to management’s recorded regulatory asset and liability balances for completeness.

• For regulatory matters in process, we inspected the Company’s filings with the Commissions and the filings with the Commissions by intervenors that may impact the Company’s future rates, for any evidence that might contradict management’s assertions.

• We made inquiries of management, including legal counsel, and obtained the regulatory orders and analysis from management that support the probability of recovery, refund, or future reductions in rates for regulatory assets and liabilities to assess management’s assertion that amounts are probable of recovery, refund, or a future reduction in rates.

/s/ Deloitte & Touche LLP

Hartford, Connecticut

February 15, 2023

We have served as the Company’s auditor since 2002.

67

THE CONNECTICUT LIGHT AND POWER COMPANY

BALANCE SHEETS

	As of December 31,
(Thousands of Dollars)	2022		2021
ASSETS
Current Assets:
Cash	$	11,312	$	55,804
Receivables, Net (net of allowance for uncollectible accounts of $225,320 and $181,319 as of December 31, 2022 and    2021, respectively)	612,052		447,774
Accounts Receivable from Affiliated Companies	46,439		43,944
Unbilled Revenues	59,363		56,787
Materials and Supplies	88,157		60,264
Taxes Receivable	65,785		55,223
Regulatory Assets	314,089		371,609
Prepayments and Other Current Assets	62,524		65,034
Total Current Assets	1,259,721		1,156,439
Property, Plant and Equipment, Net	11,467,024		10,803,543
Deferred Debits and Other Assets:
Regulatory Assets	1,593,693		1,713,161
Prepaid Pension	147,914		429
Other Long-Term Assets	290,444		276,084
Total Deferred Debits and Other Assets	2,032,051		1,989,674
Total Assets	$	14,758,796	$	13,949,656
LIABILITIES AND CAPITALIZATION
Current Liabilities:
Accounts Payable	$	710,500	$	533,454
Accounts Payable to Affiliated Companies	136,277		132,578
Regulatory Liabilities	336,048		266,489
Derivative Liabilities	81,588		73,528
Other Current Liabilities	163,875		141,955
Total Current Liabilities	1,428,288		1,148,004
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,640,034		1,562,102
Regulatory Liabilities	1,263,396		1,193,259
Derivative Liabilities	143,929		235,387
Accrued Pension, SERP and PBOP	12,887		26,820
Other Long-Term Liabilities	153,194		153,004
Total Deferred Credits and Other Liabilities	3,213,440		3,170,572
Long-Term Debt	4,216,488		4,215,379
Preferred Stock Not Subject to Mandatory Redemption	116,200		116,200
Common Stockholder's Equity:
Common Stock	60,352		60,352
Capital Surplus, Paid In	3,260,765		3,010,765
Retained Earnings	2,463,094		2,228,133
Accumulated Other Comprehensive Income	169		251
Common Stockholder's Equity	5,784,380		5,299,501
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$	14,758,796	$	13,949,656

The accompanying notes are an integral part of these financial statements.

68

THE CONNECTICUT LIGHT AND POWER COMPANY

STATEMENTS OF INCOME

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Operating Revenues	$	4,817,744	$	3,637,412	$	3,547,527
Operating Expenses:
Purchased Power and Transmission	2,110,253		1,392,969		1,369,196
Operations and Maintenance	707,162		644,175		572,897
Depreciation	355,511		338,915		320,709
Amortization of Regulatory Assets, Net	335,636		99,009		58,412
Energy Efficiency Programs	134,222		129,564		141,453
Taxes Other Than Income Taxes	384,746		363,862		344,451
Total Operating Expenses	4,027,530		2,968,494		2,807,118
Operating Income	790,214		668,918		740,409
Interest Expense	169,348		166,107		153,547
Other Income, Net	83,252		30,187		20,774
Income Before Income Tax Expense	704,118		532,998		607,636
Income Tax Expense	171,198		131,273		149,702
Net Income	$	532,920	$	401,725	$	457,934

The accompanying notes are an integral part of these financial statements.

STATEMENTS OF COMPREHENSIVE INCOME

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Net Income	$	532,920	$	401,725	$	457,934
Other Comprehensive Loss, Net of Tax:
Qualified Cash Flow Hedging Instruments	(26)		(26)		(26)
Changes in Unrealized (Losses)/Gains on Marketable Securities	(56)		(25)		12
Other Comprehensive Loss, Net of Tax	(82)		(51)		(14)
Comprehensive Income	$	532,838	$	401,674	$	457,920

The accompanying notes are an integral part of these financial statements.

69

THE CONNECTICUT LIGHT AND POWER COMPANY

STATEMENTS OF COMMON STOCKHOLDER'S EQUITY

	Common Stock			Capital Surplus, Paid In		Retained Earnings		Accumulated Other Comprehensive Income		Total Common Stockholder's Equity
(Thousands of Dollars, Except Stock Information)	Stock	Amount
Balance as of January 1, 2020	6,035,205	$	60,352	$	2,535,765	$	1,791,392	$	316	$	4,387,825
Net Income						457,934				457,934
Dividends on Preferred Stock						(5,559)				(5,559)
Dividends on Common Stock						(69,500)				(69,500)
Capital Contributions from Eversource Parent				275,000						275,000
Adoption of Accounting Standards Update 2016-13						(900)				(900)
Other Comprehensive Loss								(14)		(14)
Balance as of December 31, 2020	6,035,205	60,352		2,810,765		2,173,367		302		5,044,786
Net Income						401,725				401,725
Dividends on Preferred Stock						(5,559)				(5,559)
Dividends on Common Stock						(341,400)				(341,400)
Capital Contributions from Eversource Parent				200,000						200,000
Other Comprehensive Loss								(51)		(51)
Balance as of December 31, 2021	6,035,205	60,352		3,010,765		2,228,133		251		5,299,501
Net Income						532,920				532,920
Dividends on Preferred Stock						(5,559)				(5,559)
Dividends on Common Stock						(292,400)				(292,400)
Capital Contributions from Eversource Parent				250,000						250,000
Other Comprehensive Loss								(82)		(82)
Balance as of December 31, 2022	6,035,205	$	60,352	$	3,260,765	$	2,463,094	$	169	$	5,784,380

The accompanying notes are an integral part of these financial statements.

70

THE CONNECTICUT LIGHT AND POWER COMPANY

STATEMENTS OF CASH FLOWS

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Operating Activities:
Net Income	$	532,920	$	401,725	$	457,934
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	355,511		338,915		320,709
Deferred Income Taxes	45,381		123,889		144,527
Uncollectible Expense	15,578		13,495		12,882
Pension, SERP and PBOP (Income)/Expense, Net	(28,971)		5,295		11,372
Pension Contributions	—		(98,913)		(23,200)
Regulatory Under Recoveries, Net	(144,793)		(152,775)		(279,941)
(Customer Credits)/Reserve related to PURA Settlement Agreement and   Storm Performance Penalty	(72,041)		81,274		—
Amortization of Regulatory Assets, Net	335,636		99,009		58,412
Cost of Removal Expenditures	(71,596)		(95,792)		(57,343)
Other	(25,927)		(10,194)		(57,870)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(256,338)		(75,881)		(126,638)
Taxes Receivable/Accrued, Net	897		(25,162)		(12,014)
Accounts Payable	207,698		24,895		(17,028)
Other Current Assets and Liabilities, Net	(24,308)		(16,925)		(34,729)
Net Cash Flows Provided by Operating Activities	869,647		612,855		397,073
Investing Activities:
Investments in Property, Plant and Equipment	(876,740)		(790,083)		(833,973)
Other Investing Activities	591		329		573
Net Cash Flows Used in Investing Activities	(876,149)		(789,754)		(833,400)
Financing Activities:
Cash Dividends on Common Stock	(292,400)		(341,400)		(69,500)
Cash Dividends on Preferred Stock	(5,559)		(5,559)		(5,559)
Decrease in Notes Payable to Eversource Parent	—		—		(63,800)
Issuance of Long-Term Debt	—		425,000		400,000
Retirement of Long-Term Debt	—		(120,500)		—
Capital Contributions from Eversource Parent	250,000		200,000		275,000
Other Financing Activities	—		(5,663)		(4,976)
Net Cash Flows (Used In)/Provided by Financing Activities	(47,959)		151,878		531,165
Net (Decrease)/Increase in Cash and Restricted Cash	(54,461)		(25,021)		94,838
Cash and Restricted Cash - Beginning of Year	74,788		99,809		4,971
Cash and Restricted Cash - End of Year	$	20,327	$	74,788	$	99,809

The accompanying notes are an integral part of these financial statements.

71

Management’s Report on Internal Controls Over Financial Reporting

NSTAR Electric Company

Management is responsible for the preparation, integrity, and fair presentation of the accompanying consolidated financial statements of NSTAR Electric Company and subsidiary (NSTAR Electric or the Company) and of other sections of this annual report.  

Management is responsible for establishing and maintaining adequate internal controls over financial reporting.  The Company's internal control framework and processes have been designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America.  There are inherent limitations of internal controls over financial reporting that could allow material misstatements due to error or fraud to occur and not be prevented or detected on a timely basis by employees during the normal course of business.  Additionally, internal controls over financial reporting may become inadequate in the future due to changes in the business environment.  

Under the supervision and with the participation of the principal executive officer and principal financial officer, NSTAR Electric conducted an evaluation of the effectiveness of internal controls over financial reporting based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).  Based on this evaluation under the framework in COSO, management concluded that internal controls over financial reporting were effective as of December 31, 2022.

February 15, 2023

72

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholder of NSTAR Electric Company:

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of NSTAR Electric Company and subsidiary (the “Company”) as of December 31, 2022 and 2021, the related consolidated statements of income, comprehensive income, common stockholder’s equity, and cash flows, for each of the three years in the period ended December 31, 2022, and the related notes and the schedule listed in the Index at Item 15 of Part IV (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2022 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2022 in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Regulatory Accounting - Impact of Rate Regulation on the Financial Statements - Refer to Note 2 to the Financial Statements

Critical Audit Matter Description

The Company is subject to rate regulation by the Federal Energy Regulatory Commission and the state public utility authority in Massachusetts (the “Commissions”). The rate regulation by these Commissions is based on cost recovery. The Company’s financial statements reflect the effects of the rate-making process. The rates charged to the customers are designed to collect the Company’s cost 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. In some cases, the Company records regulatory assets before approval for recovery has been received from the applicable regulatory commission. The Company must use judgment to conclude that costs deferred as regulatory assets are probable of future recovery. The Company bases its conclusion on certain factors, including, but not limited to, regulatory precedent. Regulatory liabilities represent either revenues received from customers to fund expected costs that have not yet been incurred or probable future refunds to customers.

The Company uses judgment when recording regulatory assets and liabilities; however, regulatory commissions can reach different conclusions about the recovery of costs, and those conclusions could have a material impact on the Company’s financial statements. Management believes it is probable that the Company will recover its investment in long-lived assets, including regulatory assets. If management were to determine that it could no longer apply the accounting guidance applicable to rate-regulated enterprises to the Company’s operations, or if management could not conclude it is probable that costs would be recovered from customers in future rates, the costs would be charged to net income in the period in which the determination is made.

73

Accounting for the economics of rate-regulation impacts multiple financial statement line items and disclosures, such as regulated property, plant, and equipment, regulatory assets and liabilities, operating revenues, depreciation expense and amortization of regulatory assets. While management has indicated it expects to recover costs from customers through regulated rates, there is a risk that the Commissions will not approve full recovery of such costs or full recovery of all amounts invested in the Company and a reasonable return on that investment. We identified the impact of rate-regulation as a critical audit matter due to the significant judgments made by management to support its assertions about impact of future regulatory orders on the financial statements. Management judgments include assessing the probability of recovery in future rates of incurred costs and of a refund to customers. Given that management’s accounting judgments are based on assumptions about the outcome of future decisions by the Commissions, auditing these judgments requires specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the uncertainty of future decisions by the Commissions included the following, among others:

• We tested the effectiveness of management’s controls over the evaluation of the likelihood of (1) the recovery in future rates of costs incurred as property, plant, and equipment and deferred as regulatory assets, and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We tested the effectiveness of management’s controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; and the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates, a refund, or a future reduction in rates.

• We evaluated the Company’s disclosures related to the applicability and impacts of rate regulation, including the balances recorded and regulatory developments disclosed in the financial statements.

• We read relevant regulatory orders issued by the Commissions for the Company and other public utilities, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other publicly available information to assess the likelihood of recovery in future rates or of a future refund or reduction in rates based on precedents of the Commissions’ treatment of similar costs under similar circumstances. We also read the November 30, 2022 Massachusetts Department of Public Utilities final decision on the NSTAR Electric distribution rate case proceeding as well as the publicly available filings made by NSTAR Electric and related attachments. We evaluated the external information and compared it to management’s recorded regulatory asset and liability balances for completeness.

• For regulatory matters in process, we inspected the Company’s filings with the Commissions and the filings with the Commissions by intervenors that may impact the Company’s future rates, for any evidence that might contradict management’s assertions.

• We made inquiries of management, including legal counsel, and obtained the regulatory orders and analysis from management that support the probability of recovery, refund, or future reductions in rates for regulatory assets and liabilities to assess management’s assertion that amounts are probable of recovery, refund, or a future reduction in rates.

/s/ Deloitte & Touche LLP

Hartford, Connecticut

February 15, 2023

We have served as the Company’s auditor since 2012.

74

NSTAR ELECTRIC COMPANY AND SUBSIDIARY

CONSOLIDATED BALANCE SHEETS

	As of December 31,
(Thousands of Dollars)	2022		2021
ASSETS
Current Assets:
Cash	$	738	$	745
Cash Equivalents	327,006		—
Receivables, Net (net of allowance for uncollectible accounts of $94,958 and $97,005 as of December 31, 2022 and    2021, respectively)	453,371		405,674
Accounts Receivable from Affiliated Companies	35,196		67,420
Unbilled Revenues	39,680		37,497
Materials, Supplies and REC Inventory	138,352		116,712
Taxes Receivable	45,474		80,617
Regulatory Assets	492,759		443,956
Prepayments and Other Current Assets	25,802		22,397
Total Current Assets	1,558,378		1,175,018
Property, Plant and Equipment, Net	11,626,968		10,876,614
Deferred Debits and Other Assets:
Regulatory Assets	1,221,619		1,135,231
Prepaid Pension and PBOP	576,809		441,426
Other Long-Term Assets	111,846		171,657
Total Deferred Debits and Other Assets	1,910,274		1,748,314
Total Assets	$	15,095,620	$	13,799,946
LIABILITIES AND CAPITALIZATION
Current Liabilities:
Notes Payable	$	—	$	162,500
Long-Term Debt – Current Portion	80,000		400,000
Accounts Payable	559,676		490,915
Accounts Payable to Affiliated Companies	108,907		129,575
Obligations to Third Party Suppliers	142,628		116,273
Renewable Portfolio Standards Compliance Obligations	120,239		100,200
Regulatory Liabilities	373,221		228,248
Other Current Liabilities	83,925		84,303
Total Current Liabilities	1,468,596		1,712,014
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,700,875		1,579,508
Regulatory Liabilities	1,548,081		1,559,072
Accrued SERP	1,619		2,046
Other Long-Term Liabilities	287,694		345,888
Total Deferred Credits and Other Liabilities	3,538,269		3,486,514
Long-Term Debt	4,345,085		3,585,399
Preferred Stock Not Subject to Mandatory Redemption	43,000		43,000
Common Stockholder's Equity:
Common Stock	—		—
Capital Surplus, Paid In	2,778,942		2,253,942
Retained Earnings	2,921,444		2,718,576
Accumulated Other Comprehensive Income	284		501
Common Stockholder's Equity	5,700,670		4,973,019
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$	15,095,620	$	13,799,946

The accompanying notes are an integral part of these consolidated financial statements.

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NSTAR ELECTRIC COMPANY AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF INCOME

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Operating Revenues	$	3,583,070	$	3,056,350	$	2,941,148
Operating Expenses:
Purchased Power and Transmission	1,264,824		932,530		879,244
Operations and Maintenance	640,834		563,172		534,118
Depreciation	361,969		337,451		319,468
Amortization of Regulatory Assets, Net	83,855		55,774		83,248
Energy Efficiency Programs	332,247		288,612		263,986
Taxes Other Than Income Taxes	246,705		216,703		206,764
Total Operating Expenses	2,930,434		2,394,242		2,286,828
Operating Income	652,636		662,108		654,320
Interest Expense	162,892		146,048		130,508
Other Income, Net	142,661		74,844		52,017
Income Before Income Tax Expense	632,405		590,904		575,829
Income Tax Expense	139,977		114,335		130,828
Net Income	$	492,428	$	476,569	$	445,001

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Net Income	$	492,428	$	476,569	$	445,001
Other Comprehensive (Loss)/Income, Net of Tax:
Changes in Funded Status of SERP Benefit Plan	(221)		(100)		(286)
Qualified Cash Flow Hedging Instruments	20		298		437
Changes in Unrealized (Losses)/Gains on Marketable Securities	(16)		(6)		3
Other Comprehensive (Loss)/Income, Net of Tax	(217)		192		154
Comprehensive Income	$	492,211	$	476,761	$	445,155

The accompanying notes are an integral part of these consolidated financial statements.

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NSTAR ELECTRIC COMPANY AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY

	Common Stock			Capital Surplus, Paid In		Retained Earnings		Accumulated Other Comprehensive Income		Total Common Stockholder's Equity
(Thousands of Dollars, Except Stock Information)	Stock	Amount
Balance as of January 1, 2020	200	$	—	$	1,813,442	$	2,346,287	$	155	$	4,159,884
Net Income						445,001				445,001
Dividends on Preferred Stock						(1,960)				(1,960)
Dividends on Common Stock						(262,000)				(262,000)
Capital Contributions from Eversource Parent				180,500						180,500
Adoption of Accounting Standards Update 2016-13						(161)				(161)
Other Comprehensive Income								154		154
Balance as of December 31, 2020	200	—		1,993,942		2,527,167		309		4,521,418
Net Income						476,569				476,569
Dividends on Preferred Stock						(1,960)				(1,960)
Dividends on Common Stock						(283,200)				(283,200)
Capital Contributions from Eversource Parent				260,000						260,000
Other Comprehensive Income								192		192
Balance as of December 31, 2021	200	—		2,253,942		2,718,576		501		4,973,019
Net Income						492,428				492,428
Dividends on Preferred Stock						(1,960)				(1,960)
Dividends on Common Stock						(287,600)				(287,600)
Capital Contributions from Eversource Parent				525,000						525,000
Other Comprehensive Loss								(217)		(217)
Balance as of December 31, 2022	200	$	—	$	2,778,942	$	2,921,444	$	284	$	5,700,670

The accompanying notes are an integral part of these consolidated financial statements.

77

NSTAR ELECTRIC COMPANY AND SUBSIDIARY

CONSOLIDATED STATEMENTS OF CASH FLOWS

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Operating Activities:
Net Income	$	492,428	$	476,569	$	445,001
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	361,969		337,451		319,468
Deferred Income Taxes	78,039		57,507		72,595
Pension, SERP and PBOP Income, Net	(55,830)		(26,120)		(18,132)
Pension Contributions	(15,000)		(30,000)		(650)
Regulatory Under Recoveries, Net	(88,220)		(79,075)		(186,081)
Amortization of Regulatory Assets, Net	83,855		55,774		83,248
Uncollectible Expense	21,550		16,649		15,293
Cost of Removal Expenditures	(57,339)		(58,967)		(39,166)
Payment of Withheld Property Taxes	(76,311)		—		—
Other	(14,294)		(32,447)		(22,888)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(23,757)		(45,774)		(81,571)
Taxes Receivable/Accrued, Net	35,143		(16,219)		(44,045)
Accounts Payable	8,815		31,650		25,573
Other Current Assets and Liabilities, Net	20,430		13,944		(42,831)
Net Cash Flows Provided by Operating Activities	771,478		700,942		525,814
Investing Activities:
Investments in Property, Plant and Equipment	(954,281)		(960,949)		(907,000)
Other Investing Activities	165		91		159
Net Cash Flows Used in Investing Activities	(954,116)		(960,858)		(906,841)
Financing Activities:
Cash Dividends on Common Stock	(287,600)		(283,200)		(262,000)
Cash Dividends on Preferred Stock	(1,960)		(1,960)		(1,960)
(Decrease)/Increase in Notes Payable	(162,500)		(32,500)		184,500
Decrease in Notes Payable to Eversource Parent	—		(21,300)		(9,000)
Capital Contributions from Eversource Parent	525,000		260,000		180,500
Issuance of Long-Term Debt	850,000		600,000		400,000
Retirement of Long-Term Debt	(400,000)		(250,000)		(95,000)
Other Financing Activities	(13,188)		(10,355)		(4,915)
Net Cash Flows Provided by Financing Activities	509,752		260,685		392,125
Net Increase in Cash, Cash Equivalents and Restricted Cash	327,114		769		11,098
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	18,179		17,410		6,312
Cash, Cash Equivalents and Restricted Cash - End of Year	$	345,293	$	18,179	$	17,410

The accompanying notes are an integral part of these consolidated financial statements.

78

Management’s Report on Internal Controls Over Financial Reporting

Public Service Company of New Hampshire

Management is responsible for the preparation, integrity, and fair presentation of the accompanying consolidated financial statements of Public Service Company of New Hampshire and subsidiaries (PSNH or the Company) and of other sections of this annual report.  

Management is responsible for establishing and maintaining adequate internal controls over financial reporting.  The Company's internal control framework and processes have been designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America.  There are inherent limitations of internal controls over financial reporting that could allow material misstatements due to error or fraud to occur and not be prevented or detected on a timely basis by employees during the normal course of business.  Additionally, internal controls over financial reporting may become inadequate in the future due to changes in the business environment.  

Under the supervision and with the participation of the principal executive officer and principal financial officer, PSNH conducted an evaluation of the effectiveness of internal controls over financial reporting based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).  Based on this evaluation under the framework in COSO, management concluded that internal controls over financial reporting were effective as of December 31, 2022.

February 15, 2023

79

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholder of Public Service Company of New Hampshire:

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Public Service Company of New Hampshire and subsidiaries (the “Company”) as of December 31, 2022 and 2021, the related consolidated statements of income, comprehensive income, common stockholder’s equity, and cash flows, for each of the three years in the period ended December 31, 2022, and the related notes and the schedule listed in the Index at Item 15 of Part IV (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2022 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2022, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Regulatory Accounting - Impact of Rate Regulation on the Financial Statements - Refer to Note 2 to the Financial Statements

Critical Audit Matter Description

The Company is subject to rate regulation by the Federal Energy Regulatory Commission and the state public utility authority in New Hampshire (the “Commissions”). The rate regulation by these Commissions is based on cost recovery. The Company’s financial statements reflect the effects of the rate-making process. The rates charged to the customers are designed to collect the Company’s cost 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. In some cases, the Company records regulatory assets before approval for recovery has been received from the applicable regulatory commission. The Company must use judgment to conclude that costs deferred as regulatory assets are probable of future recovery. The Company bases its conclusion on certain factors, including, but not limited to, regulatory precedent. Regulatory liabilities represent either revenues received from customers to fund expected costs that have not yet been incurred or probable future refunds to customers.

The Company uses judgment when recording regulatory assets and liabilities; however, regulatory commissions can reach different conclusions about the recovery of costs, and those conclusions could have a material impact on the Company’s financial statements. Management believes it is probable that the Company will recover its investment in long-lived assets, including regulatory assets. If management were to determine that it could no longer apply the accounting guidance applicable to rate-regulated enterprises to the Company’s operations, or if management could not conclude it is probable that costs would be recovered from customers in future rates, the costs would be charged to net income in the period in which the determination is made.

80

Accounting for the economics of rate-regulation impacts multiple financial statement line items and disclosures, such as regulated property, plant, and equipment, regulatory assets and liabilities, operating revenues, depreciation expense and amortization of regulatory assets. While management has indicated it expects to recover costs from customers through regulated rates, there is a risk that the Commissions will not approve full recovery of such costs or full recovery of all amounts invested in the Company and a reasonable return on that investment. We identified the impact of rate-regulation as a critical audit matter due to the significant judgments made by management to support its assertions about impact of future regulatory orders on the financial statements. Management judgments include assessing the probability of recovery in future rates of incurred costs and of a refund to customers. Given that management’s accounting judgments are based on assumptions about the outcome of future decisions by the Commissions, auditing these judgments requires specialized knowledge of accounting for rate regulation and the rate setting process due to its inherent complexities.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the uncertainty of future decisions by the Commissions included the following, among others:

• We tested the effectiveness of management’s controls over the evaluation of the likelihood of (1) the recovery in future rates of costs incurred as property, plant, and equipment and deferred as regulatory assets, and (2) a refund or a future reduction in rates that should be reported as regulatory liabilities. We tested the effectiveness of management’s controls over the initial recognition of amounts as property, plant, and equipment; regulatory assets or liabilities; and the monitoring and evaluation of regulatory developments that may affect the likelihood of recovering costs in future rates, a refund, or a future reduction in rates.

• We evaluated the Company’s disclosures related to the applicability and impacts of rate regulation, including the balances recorded and regulatory developments disclosed in the financial statements.

• We read relevant regulatory orders issued by the Commissions for the Company and other public utilities, regulatory statutes, interpretations, procedural memorandums, filings made by intervenors, and other publicly available information to assess the likelihood of recovery in future rates or of a future refund or reduction in rates based on precedents of the Commissions’ treatment of similar costs under similar circumstances. We evaluated the external information and compared it to management’s recorded regulatory asset and liability balances for completeness.

• For regulatory matters in process, we inspected the Company’s filings with the Commissions and the filings with the Commissions by intervenors that may impact the Company’s future rates, for any evidence that might contradict management’s assertions.

• We made inquiries of management, including legal counsel, and obtained the regulatory orders and analysis from management that support the probability of recovery, refund, or future reductions in rates for regulatory assets and liabilities to assess management’s assertion that amounts are probable of recovery, refund, or a future reduction in rates.

/s/ Deloitte & Touche LLP

Hartford, Connecticut

February 15, 2023

We have served as the Company’s auditor since 2002.

81

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

	As of December 31,
(Thousands of Dollars)	2022		2021
ASSETS
Current Assets:
Cash	$	136	$	15
Receivables, Net (net of allowance for uncollectible accounts of $29,236 and $24,331 as of December 31, 2022 and    2021, respectively)	173,337		124,232
Accounts Receivable from Affiliated Companies	8,193		17,156
Unbilled Revenues	72,713		53,937
Taxes Receivable	27,978		4,487
Materials, Supplies and REC Inventory	34,521		25,930
Regulatory Assets	102,240		107,169
Special Deposits	33,140		31,390
Prepayments and Other Current Assets	13,297		17,622
Total Current Assets	465,555		381,938
Property, Plant and Equipment, Net	4,060,224		3,656,462
Deferred Debits and Other Assets:
Regulatory Assets	593,974		679,182
Prepaid Pension	66,384		—
Other Long-Term Assets	16,517		23,202
Total Deferred Debits and Other Assets	676,875		702,384
Total Assets	$	5,202,654	$	4,740,784
LIABILITIES AND CAPITALIZATION
Current Liabilities:
Notes Payable to Eversource Parent	$	173,300	$	110,600
Long-Term Debt – Current Portion	29,668		—
Rate Reduction Bonds – Current Portion	43,210		43,210
Accounts Payable	291,556		166,452
Accounts Payable to Affiliated Companies	36,231		43,485
Regulatory Liabilities	161,963		120,176
Other Current Liabilities	59,616		63,005
Total Current Liabilities	795,544		546,928
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	562,802		537,978
Regulatory Liabilities	391,628		381,366
Accrued Pension, SERP and PBOP	6,508		30,184
Other Long-Term Liabilities	30,579		34,080
Total Deferred Credits and Other Liabilities	991,517		983,608
Long-Term Debt	1,134,914		1,163,833
Rate Reduction Bonds	410,492		453,702
Common Stockholder's Equity:
Common Stock	—		—
Capital Surplus, Paid In	1,298,134		1,088,134
Retained Earnings	572,126		504,556
Accumulated Other Comprehensive (Loss)/Income	(73)		23
Common Stockholder's Equity	1,870,187		1,592,713
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$	5,202,654	$	4,740,784

The accompanying notes are an integral part of these consolidated financial statements.

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF INCOME

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Operating Revenues	$	1,474,799	$	1,177,248	$	1,079,095
Operating Expenses:
Purchased Power and Transmission	665,478		370,271		364,067
Operations and Maintenance	255,991		237,659		219,325
Depreciation	127,962		120,065		100,372
Amortization of Regulatory Assets, Net	42,867		86,832		52,804
Energy Efficiency Programs	37,434		38,752		37,583
Taxes Other Than Income Taxes	95,301		91,465		81,611
Total Operating Expenses	1,225,033		945,044		855,762
Operating Income	249,766		232,204		223,333
Interest Expense	59,548		56,998		58,127
Other Income, Net	32,666		14,565		13,786
Income Before Income Tax Expense	222,884		189,771		178,992
Income Tax Expense	51,314		39,433		31,680
Net Income	$	171,570	$	150,338	$	147,312

The accompanying notes are an integral part of these consolidated financial statements.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Net Income	$	171,570	$	150,338	$	147,312
Other Comprehensive (Loss)/Income, Net of Tax:
Qualified Cash Flow Hedging Instruments	—		673		1,075
Changes in Unrealized (Losses)/Gains on Marketable Securities	(96)		(37)		19
Other Comprehensive (Loss)/Income, Net of Tax	(96)		636		1,094
Comprehensive Income	$	171,474	$	150,974	$	148,406

The accompanying notes are an integral part of these consolidated financial statements.

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY

	Common Stock			Capital Surplus, Paid In		Retained Earnings		Accumulated Other Comprehensive (Loss)/Income		Total Common Stockholder's Equity
(Thousands of Dollars, Except Stock Information)	Stock	Amount
Balance as of January 1, 2020	301	$	—	$	903,134	$	490,306	$	(1,707)	$	1,391,733
Net Income						147,312				147,312
Dividends on Common Stock						(22,300)				(22,300)
Capital Contributions from Eversource Parent				25,000						25,000
Adoption of Accounting Standards Update 2016-13						(300)				(300)
Other Comprehensive Income								1,094		1,094
Balance as of December 31, 2020	301	—		928,134		615,018		(613)		1,542,539
Net Income						150,338				150,338
Dividends on Common Stock						(260,800)				(260,800)
Capital Contributions from Eversource Parent				160,000						160,000
Other Comprehensive Income								636		636
Balance as of December 31, 2021	301	—		1,088,134		504,556		23		1,592,713
Net Income						171,570				171,570
Dividends on Common Stock						(104,000)				(104,000)
Capital Contributions from Eversource Parent				210,000						210,000
Other Comprehensive Loss								(96)		(96)
Balance as of December 31, 2022	301	$	—	$	1,298,134	$	572,126	$	(73)	$	1,870,187

The accompanying notes are an integral part of these consolidated financial statements.

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

	For the Years Ended December 31,
(Thousands of Dollars)	2022		2021		2020
Operating Activities:
Net Income	$	171,570	$	150,338	$	147,312
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	127,962		120,065		100,372
Deferred Income Taxes	15,765		(14,530)		7,337
Uncollectible Expense	9,211		13,113		5,164
Pension, SERP and PBOP Income, Net	(16,421)		(3,296)		(1,255)
Pension Contributions	—		—		(19,500)
Regulatory Over/(Under) Recoveries, Net	53,181		32,587		(45,830)
Amortization of Regulatory Assets, Net	42,867		86,832		52,804
Cost of Removal Expenditures	(39,895)		(30,804)		(22,063)
Other	8,691		(1,370)		17,221
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(62,078)		(32,003)		(33,612)
Taxes Receivable/Accrued, Net	(23,492)		3,952		(6,942)
Accounts Payable	81,046		(3,256)		27,270
Other Current Assets and Liabilities, Net	(6,908)		14,454		(9,610)
Net Cash Flows Provided by Operating Activities	361,499		336,082		218,668
Investing Activities:
Investments in Property, Plant and Equipment	(485,611)		(326,379)		(342,586)
Other Investing Activities	1,013		562		982
Net Cash Flows Used in Investing Activities	(484,598)		(325,817)		(341,604)
Financing Activities:
Cash Dividends on Common Stock	(104,000)		(260,800)		(22,300)
Increase in Notes Payable to Eversource Parent	62,700		64,300		19,300
Issuance of Long-Term Debt	—		350,000		150,000
Retirement of Long-Term Debt	—		(282,000)		—
Repayment of Rate Reduction Bonds	(43,210)		(43,210)		(43,210)
Capital Contributions from Eversource Parent	210,000		160,000		25,000
Other Financing Activities	(705)		(2,984)		(2,987)
Net Cash Flows Provided by/(Used In) Financing Activities	124,785		(14,694)		125,803
Net Increase/(Decrease) in Cash and Restricted Cash	1,686		(4,429)		2,867
Cash and Restricted Cash - Beginning of Year	35,126		39,555		36,688
Cash and Restricted Cash - End of Year	$	36,812	$	35,126	$	39,555

The accompanying notes are an integral part of these consolidated financial statements.

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EVERSOURCE ENERGY AND SUBSIDIARIES

THE CONNECTICUT LIGHT AND POWER COMPANY

NSTAR ELECTRIC COMPANY AND SUBSIDIARY

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES

COMBINED NOTES TO FINANCIAL STATEMENTS

Refer to the Glossary of Terms included in this combined Annual Report on Form 10-K for abbreviations and acronyms used throughout the combined notes to the financial statements.

1.     SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

A.     About Eversource, CL&P, NSTAR Electric and PSNH

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.  

Eversource, CL&P, NSTAR Electric and PSNH are reporting companies under the Securities Exchange Act of 1934.  Eversource Energy is a public utility holding company under the Public Utility Holding Company Act of 2005.  Arrangements among the regulated electric companies and other Eversource companies, outside agencies and other utilities covering interconnections, interchange of electric power and sales of utility property are subject to regulation by the FERC. Eversource's regulated companies are subject to regulation of rates, accounting and other matters by the FERC and/or applicable state regulatory commissions (the PURA for CL&P, Yankee Gas and Aquarion, the DPU for NSTAR Electric, NSTAR Gas, EGMA and Aquarion, and the NHPUC for PSNH and Aquarion).

CL&P, NSTAR Electric and PSNH furnish franchised retail electric service in Connecticut, Massachusetts and New Hampshire, respectively. NSTAR Gas and EGMA are engaged in the distribution and sale of natural gas to customers within Massachusetts and Yankee Gas is engaged in the distribution and sale of natural gas to customers within Connecticut. Aquarion is engaged in the collection, treatment and distribution of water in Connecticut, Massachusetts and New Hampshire. CL&P, NSTAR Electric and PSNH's results include the operations of their respective distribution and transmission businesses. The distribution business also includes the results of NSTAR Electric's solar power facilities.

Eversource Service, Eversource's service company, and several wholly-owned real estate subsidiaries of Eversource, provide support services to Eversource, including its regulated companies.

B.     Basis of Presentation

The 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 consolidated financial statements of Eversource, NSTAR Electric and PSNH and the financial statements of CL&P are herein collectively referred to as the "financial statements."  

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.

CYAPC and YAEC are inactive regional nuclear power companies engaged in the long-term storage of their spent nuclear fuel. Eversource consolidates the operations of CYAPC and YAEC because CL&P's, NSTAR Electric's and PSNH's combined ownership and voting interests in each of these entities is greater than 50 percent.  Intercompany transactions between CL&P, NSTAR Electric, PSNH and the CYAPC and YAEC companies have been eliminated in consolidation of the Eversource financial statements.  

Eversource holds several equity ownership interests that are not consolidated and are accounted for under the equity method.

In accordance with accounting guidance on noncontrolling interests in consolidated financial statements, the Preferred Stock of CL&P and the Preferred Stock of NSTAR Electric, which are not owned by Eversource or its consolidated subsidiaries and are not subject to mandatory redemption, have been presented as noncontrolling interests in the financial statements of Eversource.  The Preferred Stock of CL&P and the Preferred Stock of NSTAR Electric are considered to be temporary equity and have been classified between liabilities and permanent shareholders' equity on the balance sheets of Eversource, CL&P and NSTAR Electric due to a provision in the preferred stock agreements of both CL&P and NSTAR Electric that grant preferred stockholders the right to elect a majority of the CL&P and NSTAR Electric Boards of Directors, respectively, should certain conditions exist, such as if preferred dividends are in arrears for a specified amount of time.  The Net Income reported in the statements of income and cash flows represents net income prior to apportionment to noncontrolling interests, which is represented by dividends on preferred stock of CL&P and NSTAR Electric.

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.

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As of December 31, 2022 and 2021, Eversource's carrying amount of goodwill was $4.52 billion and $4.48 billion, respectively. Eversource performs an assessment for possible impairment of its goodwill at least annually.  Eversource completed its annual goodwill impairment assessment for each of its reporting units as of October 1, 2022 and determined that no impairment exists.  See Note 25, "Goodwill," for further information.

For the year ended December 31, 2022, no impairments to goodwill, long-lived assets, available-for-sale debt securities, or equity method investment carrying values were identified.

Certain reclassifications of prior year data were made in the accompanying financial statements to conform to the current year presentation.

C.     Cash and Cash Equivalents

Cash includes cash on hand. At the end of each reporting period, any overdraft amounts are reclassified from Cash to Accounts Payable on the balance sheets. Cash Equivalents include short-term cash investments that are highly liquid in nature and have original maturities of three months or less.  

D.     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, which was implemented on January 1, 2020 (ASU 2016-13), 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 being offered to customers, reasonable forecasts, and expectations of future collectability and collection efforts. Management continuously assesses the collectability of receivables and adjusts estimates based on actual experience and future expectations based on economic conditions, collection efforts and other factors. Management also monitors the aging analysis of receivables to determine if there are changes in the collections of accounts receivable. Receivable balances are written off against the allowance for uncollectible accounts when the customer accounts are no longer in service and these balances are deemed to be uncollectible. Management concluded that the reserve balance as of December 31, 2022 adequately reflected the collection risk and net realizable value for its receivables.

As of December 31, 2022 and 2021, the total amount incurred as a result of COVID-19 included in the allowance for uncollectible accounts was $50.9 million and $55.3 million at Eversource, $16.0 million and $23.9 million at CL&P, and $4.1 million and $9.0 million at NSTAR Electric, respectively. At our Connecticut and Massachusetts utilities, the COVID-19 related uncollectible amounts were deferred either as incremental regulatory costs or deferred through existing regulatory tracking mechanisms that recover uncollectible energy supply costs, as management believes it is probable that these costs will ultimately be recovered from customers in future rates. No COVID-19 related uncollectible amounts were deferred at PSNH as a result of a July 2021 NHPUC order. Based on the status of our COVID-19 regulatory dockets, policies and practices in the jurisdictions in which we operate, we believe the state regulatory commissions in Connecticut and Massachusetts will allow us to recover our incremental uncollectible customer receivable costs associated with COVID-19.

The PURA allows CL&P and Yankee Gas to accelerate the recovery of accounts receivable balances attributable to qualified customers under financial or medical duress (uncollectible hardship accounts receivable) outstanding for greater than 180 days and 90 days, respectively.  The DPU allows NSTAR Electric, NSTAR Gas and EGMA to recover in rates amounts associated with certain uncollectible hardship accounts receivable. These uncollectible hardship customer account balances are included in Regulatory Assets or Other Long-Term Assets on the balance sheets. Hardship customers are protected from shut-off in certain circumstances, and historical collection experience has reflected a higher default risk as compared to the rest of the receivable population. Management uses a higher credit risk profile for this pool of trade receivables as compared to non-hardship receivables. The allowance for uncollectible hardship accounts is included in the total uncollectible allowance balance.  

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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 is as follows:

	Eversource						CL&P						NSTAR Electric						PSNH
(Millions of Dollars)	Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Total Allowance
Balance as of January 1, 2020	$	143.3	$	81.5	$	224.8	$	80.1	$	17.2	$	97.3	$	43.9	$	31.5	$	75.4	$	10.5
ASU 2016-13 Implementation    Impact on January 1, 2020	21.6		2.2		23.8		21.3		0.9		22.2		(1.6)		0.3		(1.3)		0.3
Increase due to CMA acquisition	—		24.2		24.2		—		—		—		—		—		—		—
Uncollectible Expense	—		53.5		53.5		—		12.9		12.9		—		15.3		15.3		5.2
Uncollectible Costs Deferred (1)	43.1		53.9		97.0		38.2		10.8		49.0		(1.7)		26.4		24.7		7.4
Write-Offs	(14.7)		(63.3)		(78.0)		(11.9)		(17.8)		(29.7)		(0.9)		(26.3)		(27.2)		(6.9)
Recoveries Collected	1.5		12.1		13.6		1.4		4.3		5.7		—		4.7		4.7		0.7
Balance as of December 31, 2020	$	194.8	$	164.1	$	358.9	$	129.1	$	28.3	$	157.4	$	39.7	$	51.9	$	91.6	$	17.2
Uncollectible Expense	—		60.9		60.9		—		13.5		13.5		—		16.6		16.6		13.1
Uncollectible Costs Deferred (1)	51.9		58.7		110.6		32.3		25.5		57.8		4.3		15.8		20.1		3.1
Write-Offs	(22.0)		(107.7)		(129.7)		(18.0)		(36.2)		(54.2)		(0.7)		(36.3)		(37.0)		(10.0)
Recoveries Collected	1.4		15.3		16.7		1.2		5.6		6.8		—		5.7		5.7		0.9
Balance as of December 31, 2021	$	226.1	$	191.3	$	417.4	$	144.6	$	36.7	$	181.3	$	43.3	$	53.7	$	97.0	$	24.3
Uncollectible Expense	—		61.9		61.9		—		15.6		15.6		—		21.6		21.6		9.2
Uncollectible Costs Deferred (1)	77.8		34.7		112.5		58.3		1.2		59.5		1.5		10.9		12.4		2.5
Write-Offs	(21.3)		(102.7)		(124.0)		(15.3)		(23.0)		(38.3)		(1.1)		(41.2)		(42.3)		(7.7)
Recoveries Collected	1.8		16.7		18.5		1.3		5.9		7.2		—		6.3		6.3		0.9
Balance as of December 31, 2022	$	284.4	$	201.9	$	486.3	$	188.9	$	36.4	$	225.3	$	43.7	$	51.3	$	95.0	$	29.2

(1)    These expected credit losses are deferred as regulatory costs on the balance sheets, as these amounts are ultimately recovered in rates. Amounts include uncollectible costs for hardship accounts and other customer receivables, including uncollectible amounts related to uncollectible energy supply costs and COVID-19. The increase in the allowance for uncollectible hardship accounts in 2022 at Eversource and CL&P primarily relates to increased customer enrollment in disconnection prevention programs in Connecticut.

E.    Transfer of Energy Efficiency Loans

CL&P transferred a portion of its energy efficiency customer loan portfolio to outside lenders in order to make additional loans to customers.  CL&P remains the servicer of the loans and will transmit customer payments to the lenders, with a maximum amount outstanding under this program of $55 million.  The amounts of the loans are included in Accounts Receivable, Net and Other Long-Term Assets, and are offset by Other Current Liabilities and Other Long-Term Liabilities on CL&P’s balance sheet. The current and long-term portions totaled $9.1 million and $13.0 million, respectively, as of December 31, 2022, and $10.5 million and $8.3 million, respectively, as of December 31, 2021.

F.     Materials, Supplies, Natural Gas and REC Inventory

Materials, Supplies, Natural Gas and REC Inventory include materials and supplies purchased primarily for construction or operation and maintenance purposes, natural gas purchased for delivery to customers, and RECs.  Inventory is valued at the lower of cost or net realizable value. RECs are purchased from suppliers of renewable sources of generation and are used to meet state mandated Renewable Portfolio Standards requirements.  The carrying amounts of materials and supplies, natural gas inventory, and RECs, which are included in Current Assets on the balance sheets, were as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Materials and Supplies	$	221.0	$	88.2	$	81.0	$	34.4	$	148.9	$	60.3	$	55.0	$	25.2
Natural Gas	95.9		—		—		—		56.2		—		—		—
RECs	57.5		—		57.4		0.1		62.4		—		61.7		0.7
Total	$	374.4	$	88.2	$	138.4	$	34.5	$	267.5	$	60.3	$	116.7	$	25.9

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G.     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," Note 6, "Investments in Unconsolidated Affiliates," Note 7, "Asset Retirement Obligations," Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," Note 15, "Fair Value of Financial Instruments," and Note 25, “Goodwill,” to the financial statements.

H.     Derivative Accounting

Many of the electric and natural gas companies' contracts for the purchase and sale of energy or energy-related products are derivatives.  The accounting treatment for energy contracts entered into varies and depends on the intended use of the particular contract and on whether or not the contract is a derivative.  

The application of derivative accounting is complex and requires management judgment in the following respects: identification of derivatives and embedded derivatives, election and designation of a contract as normal, and determination of the fair value of derivative contracts.  All of these judgments can have a significant impact on the financial statements.  The judgment applied in the election of a contract as normal (and resulting accrual accounting) includes the conclusion that it is probable at the inception of the contract and throughout its term that it will result in physical delivery of the underlying product and that the quantities will be used or sold by the business in the normal course of business.  If facts and circumstances change and management can no longer support this conclusion, then a contract cannot be considered normal, accrual accounting is terminated, and fair value accounting is applied prospectively.  

The fair value of derivative contracts is based upon the contract terms and conditions and the underlying market price or fair value per unit.  When quantities are not specified in the contract, the Company determines whether the contract has a determinable quantity by using amounts referenced in default provisions and other relevant sections of the contract.  The fair value of derivative assets and liabilities with the same counterparty are offset and recorded as a net derivative asset or liability on the balance sheets.  

Regulatory assets or regulatory liabilities are recorded to offset the fair values of these derivative contracts related to energy and energy-related products, as contract settlements are recovered from, or refunded to, customers in future rates. All changes in the fair value of these derivative contracts are recorded as regulatory assets or liabilities and do not impact net income.

For further information regarding derivative contracts, see Note 4, "Derivative Instruments," to the financial statements.

I.     Operating Expenses

The cost of natural gas included in Purchased Power, Purchased Natural Gas and Transmission on the statements of income were as follows:

	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Eversource - Cost of Natural Gas	$	1,010.2	$	718.6	$	464.2

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J.     Allowance for Funds Used During Construction

AFUDC represents the cost of borrowed and equity funds used to finance construction and is included in the cost of the electric, natural gas and water companies' utility plant on the balance sheet.  The portion of AFUDC attributable to borrowed funds is recorded as a reduction of Interest Expense, and the AFUDC related to equity funds is recorded as Other Income, Net on the statements of income.  AFUDC costs are recovered from customers over the service life of the related plant in the form of increased revenue collected as a result of higher depreciation expense.

The average AFUDC rate is based on a FERC-prescribed formula using the cost of a company's short-term financings and capitalization (preferred stock, long-term debt and common equity), as appropriate.  The average rate is applied to average eligible CWIP amounts to calculate AFUDC.

AFUDC costs and the weighted-average AFUDC rates were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars, except percentages)	2022			2021			2020
Borrowed Funds	$	21.8		$	18.4		$	23.7
Equity Funds	47.3			37.3			42.0
Total AFUDC	$	69.1		$	55.7		$	65.7
Average AFUDC Rate	4.7		%	4.2		%	5.0		%

	For the Years Ended December 31,
	2022									2021									2020
(Millions of Dollars, except percentages)	CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH
Borrowed Funds	$	4.8		$	10.7		$	1.4		$	2.9		$	9.0		$	0.8		$	6.6		$	9.1		$	2.1
Equity Funds	13.6			24.6			2.5			7.7			20.4			1.6			13.8			21.5			4.2
Total AFUDC	$	18.4		$	35.3		$	3.9		$	10.6		$	29.4		$	2.4		$	20.4		$	30.6		$	6.3
Average AFUDC Rate	6.6		%	5.4		%	2.6		%	5.0		%	4.9		%	2.5		%	5.9		%	5.7		%	4.7		%

K.     Other Income, Net

The components of Other Income, Net on the statements of income were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Pension, SERP and PBOP Non-Service Income Components,   Net of Deferred Portion (1)	$	219.8	$	84.4	$	44.4
AFUDC Equity	47.3		37.3		42.0
Equity in Earnings of Unconsolidated Affiliates (2)	22.9		14.2		14.2
Investment Income/(Loss)	1.9		(0.2)		1.1
Interest Income	50.5		25.6		4.8
Gain on Sale of Property	2.6		0.1		1.8
Other	1.1		(0.1)		0.3
Total Other Income, Net	$	346.1	$	161.3	$	108.6

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion (1)	$	64.4	$	85.5	$	26.8	$	15.2	$	40.2	$	10.3	$	3.8	$	29.3	$	7.0
AFUDC Equity	13.6		24.6		2.5		7.7		20.4		1.6		13.8		21.5		4.2
Investment (Loss)/Income	(1.3)		1.2		0.2		1.3		0.1		0.1		1.1		(0.8)		0.1
Interest Income	6.5		30.7		3.1		5.9		13.4		2.4		2.0		0.9		2.4
Other	0.1		0.7		0.1		0.1		0.7		0.2		0.1		1.1		0.1
Total Other Income, Net	$	83.3	$	142.7	$	32.7	$	30.2	$	74.8	$	14.6	$	20.8	$	52.0	$	13.8

(1)    See Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," for the components of net periodic benefit income/expense for the Pension, SERP and PBOP Plans. The non-service related components of pension, SERP and PBOP benefit income/expense, after capitalization or deferral, are presented as non-operating income and recorded in Other Income, Net on the statements of income.

(2)    Equity in earnings of unconsolidated affiliates includes $12.2 million and $2.1 million of pre-tax unrealized gains for the years ended December 31, 2022 and 2021, respectively, and $2.4 million of primarily realized gains for the year ended December 31, 2020, associated with an equity method investment in a renewable energy fund. Equity in earnings of unconsolidated affiliates for the year ended December 31, 2020 includes an other-than-temporary impairment of $2.8 million related to a write-off of an investment within a renewable energy fund. See Note 6, "Investments in Unconsolidated Affiliates," for Eversource’s equity method investments.

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L.     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 Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Eversource	$	194.7	$	181.9	$	170.6
CL&P	166.1		158.1		149.9

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.  

M.     Supplemental Cash Flow Information

Eversource (Millions of Dollars)	As of and For the Years Ended December 31,
	2022		2021		2020
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	$	636.2	$	568.7	$	518.0
Income Taxes	77.9		121.6		48.9
Non-Cash Investing Activities:
Plant Additions Included in Accounts Payable (As of)	586.9		467.9		367.2

	As of and For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	$	167.2	$	152.8	$	58.3	$	161.5	$	141.6	$	56.5	$	149.0	$	129.4	$	54.5
Income Taxes	117.6		23.8		58.3		38.4		74.2		51.1		10.9		110.7		34.2
Non-Cash Investing Activities:
Plant Additions Included in Accounts   Payable (As of)	131.8		184.3		76.2		110.6		120.0		68.7		101.8		103.2		33.3

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 December 31,
	2022								2021
(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	$	374.6	$	11.3	$	327.7	$	0.1	$	66.8	$	55.8	$	0.7	$	—
Restricted cash included in:
Special Deposits	102.2		8.8		17.5		33.1		78.2		18.7		17.4		31.4
Marketable Securities	25.4		0.2		0.1		0.4		31.3		0.3		0.1		0.5
Other Long-Term Assets	19.6		—		—		3.2		44.7		—		—		3.2
Cash, Cash Equivalents and Restricted Cash     as reported on the Statements of Cash Flows	$	521.8	$	20.3	$	345.3	$	36.8	$	221.0	$	74.8	$	18.2	$	35.1

Special Deposits represent cash collections related to the PSNH RRB customer charges that are held in trust, required ISO-NE cash deposits, cash held in escrow accounts, and CYAPC and YAEC cash balances. The December 31, 2021 balance also included a $10 million customer assistance fund to provide bill payment assistance to certain existing non-hardship and hardship customers carrying arrearages at CL&P established under the terms of the PURA-approved October 2021 settlement agreement. Those customers were provided with $10 million of bill forgiveness in the first quarter of 2022, which represented a non-cash transaction. Special Deposits are included in Current Assets on the balance sheets. Restricted cash included in Marketable Securities represents money market funds held in trusts to fund certain non-qualified executive benefits and restricted trusts to fund CYAPC and YAEC's spent nuclear fuel storage obligations.

Restricted cash also includes an Energy Relief Fund for energy efficiency and clean energy measures in the Merrimack Valley and an additional energy efficiency program established under the terms of the EGMA 2020 settlement agreement. As of December 31, 2022, $20.0 million of this restricted cash was recorded as short-term in Special Deposits and $15.9 million was recorded in Other Long-Term Assets. As of December 31, 2021, this restricted cash totaled $41.5 million and was recorded in Other Long-Term Assets on the balance sheet.

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Cash Equivalents at NSTAR Electric of $327.0 million related to a cash infusion by Eversource parent received in December 2022 recorded in a money market account.

N.     Related Parties

Eversource Service, Eversource's service company, provides centralized accounting, administrative, engineering, financial, information technology, legal, operational, planning, purchasing, tax, and other services to Eversource's companies.  The Rocky River Realty Company and Properties, Inc., two other Eversource subsidiaries, construct, acquire or lease some of the property and facilities used by Eversource's companies.

As of both December 31, 2022 and 2021, CL&P, NSTAR Electric and PSNH had long-term receivables from Eversource Service in the amounts of $25.0 million, $5.5 million and $3.8 million, respectively, which were included in Other Long-Term Assets on the balance sheets. These amounts related to the funding of investments held in trust by Eversource Service in connection with certain postretirement benefits for CL&P, NSTAR Electric and PSNH employees and have been eliminated in consolidation on the Eversource financial statements.  

Included in the CL&P, NSTAR Electric and PSNH balance sheets as of December 31, 2022 and 2021 were Accounts Receivable from Affiliated Companies and Accounts Payable to Affiliated Companies relating to transactions between CL&P, NSTAR Electric and PSNH and other subsidiaries that are wholly-owned by Eversource.  These amounts have been eliminated in consolidation on the Eversource financial statements.

The Eversource Energy Foundation is an independent not-for-profit charitable entity and is not included in the consolidated financial statements of Eversource as the Company does not have title to, and cannot receive contributions back from, the Eversource Energy Foundation's assets. Eversource made contributions to the Eversource Energy Foundation of $8.0 million in 2022 and $6.4 million in 2020 and did not make any contributions in 2021.

2.     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 December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Benefit Costs	$	921.7	$	156.7	$	299.5	$	56.6	$	1,481.0	$	272.4	$	395.5	$	118.9
Storm Costs, Net	1,379.1		799.3		484.4		95.4		1,102.7		695.6		341.3		65.8
Regulatory Tracking Mechanisms	1,075.3		216.8		391.5		73.7		1,050.5		333.6		376.6		85.4
Income Taxes, Net	853.3		491.1		115.6		16.0		790.7		470.5		112.6		17.5
Securitized Stranded Costs	435.7		—		—		435.7		478.9		—		—		478.9
Goodwill-related	281.0		—		241.2		—		297.8		—		255.7		—
Derivative Liabilities	181.8		181.8		—		—		249.2		249.2		—		—
Asset Retirement Obligations	127.9		35.9		68.2		4.4		115.0		33.6		59.8		4.1
Other Regulatory Assets	322.5		26.2		114.0		14.4		150.0		29.9		37.7		15.8
Total Regulatory Assets	5,578.3		1,907.8		1,714.4		696.2		5,715.8		2,084.8		1,579.2		786.4
Less:  Current Portion	1,335.5		314.1		492.8		102.2		1,129.1		371.6		444.0		107.2
Total Long-Term Regulatory Assets	$	4,242.8	$	1,593.7	$	1,221.6	$	594.0	$	4,586.7	$	1,713.2	$	1,135.2	$	679.2

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Benefit Costs:   Deferred benefit costs represent unrecognized actuarial losses and gains and unrecognized prior service costs and credits attributable to Eversource's Pension, SERP and PBOP Plans. The regulated companies record actuarial losses and gains and prior service costs and credits arising at the December 31st remeasurement date of the funded status of the benefit plans as a regulatory asset or regulatory liability in lieu of a charge to Accumulated Other Comprehensive Income/(Loss), reflecting ultimate recovery from customers through rates.  The regulatory asset or regulatory liability is amortized with the recognition of actuarial losses and gains and prior service costs and credits to net periodic benefit expense/income over the estimated average future employee service period using the corridor approach.  Regulatory accounting is also applied to the portions of Eversource's service company costs that support the regulated companies, as these amounts are also recoverable.  As these regulatory assets or regulatory liabilities do not represent a cash outlay for the regulated companies, no carrying charge is recovered from customers. See Note 11A, "Employee Benefits - Pension Benefits and Postretirement Benefits Other Than Pension," for further information on regulatory benefit plan amounts arising and amortized during the year.

Eversource, CL&P, NSTAR Electric, and PSNH recover benefit costs related to their distribution and transmission operations from customers in rates as allowed by their applicable regulatory commissions.  NSTAR Electric, NSTAR Gas and EGMA recover qualified pension and PBOP expenses related to their distribution operations through a rate reconciling mechanism that fully tracks the change in net pension and PBOP expenses each year.  The electric transmission companies' rates provide for an annual true-up of estimated to actual costs, which include pension and PBOP expenses.

Storm Costs, Net: The storm cost deferrals relate to costs incurred for storm events at CL&P, NSTAR Electric and PSNH that each company expects to recover from customers.  A storm must meet certain criteria to qualify for deferral and recovery with the criteria specific to each state jurisdiction and utility company. Once a storm qualifies for recovery, all qualifying expenses incurred during storm restoration efforts are deferred and recovered from customers. Costs for storms that do not meet the specific criteria are expensed as incurred. In addition to storm restoration costs, CL&P and PSNH are each allowed to recover pre-staging storm costs. Management believes all storm costs deferred were prudently incurred and meet the criteria for specific cost recovery in Connecticut, Massachusetts and New Hampshire, and that recovery from customers is probable through the applicable regulatory recovery processes. Each electric utility company either recovers a carrying charge on its deferred storm cost regulatory asset balance or the regulatory asset balance is included in rate base.

Multiple tropical and severe storms over the past several years have caused extensive damage to Eversource’s electric distribution systems resulting in significant numbers and durations of customer outages, along with significant pre-staging costs. Storms in 2022 that qualified for future recovery resulted in deferred storm restoration costs and pre-staging costs totaling $399 million at Eversource, including $163 million at CL&P, $181 million at NSTAR Electric, and $55 million at PSNH. Management believes that all of these storm costs were prudently incurred and meet the criteria for specific cost recovery. Of Eversource’s total deferred storm costs, $1.40 billion either have yet to be filed with the applicable regulatory commission, are pending regulatory approval, or are subject to prudency review (including $807 million at CL&P, $492 million at NSTAR Electric and $98 million at PSNH) as of December 31, 2022. These storm cost totals exclude storm funding amounts that are collected in rates, which are recorded as a reduction to the deferred storm cost regulatory asset balance. NSTAR Electric and PSNH are seeking approval of their deferred storm restoration costs through the applicable regulatory recovery process. As part of CL&P’s October 1, 2021 settlement agreement, CL&P agreed to freeze its current base distribution rates (including storm costs) until no earlier than January 1, 2024. As a result, CL&P has not yet filed for approval of its storm costs in a regulatory proceeding.

CL&P Tropical Storm Isaias Costs: On August 4, 2020, Tropical Storm Isaias caused catastrophic damage to our electric distribution system, which resulted in significant numbers and durations of customer outages, primarily in Connecticut. In terms of customer outages, this storm was one of the worst in CL&P’s history. PURA will investigate the prudency of costs incurred by CL&P to restore service in response to Tropical Storm Isaias. That investigation is expected to occur either in a separate proceeding not yet initiated or as part of CL&P’s next rate review proceeding. Tropical Storm Isaias resulted in deferred storm restoration costs of approximately $235 million at CL&P as of December 31, 2022. Although PURA found that CL&P’s performance in its preparation for, and response to, Tropical Storm Isaias fell below applicable performance standards in certain instances, CL&P believes it will be able to present credible evidence in a future proceeding demonstrating there is no reasonably close causal connection between the alleged sub-standard performance and the storm costs incurred. While it is possible that some amount of storm costs may be disallowed by PURA in a future proceeding, any such amount cannot be estimated at this time. Eversource and CL&P continue to believe that these storm restoration costs associated with Tropical Storm Isaias were prudently incurred and meet the criteria for cost recovery; and as a result, management does not expect the storm cost review by PURA to have a material impact on the financial position or results of operations of Eversource or CL&P.

Regulatory Tracking Mechanisms:  The regulated companies' approved rates are designed to recover costs incurred to provide service to customers. The regulated companies recover certain of their costs on a fully-reconciling basis through regulatory commission-approved tracking mechanisms. The differences between the costs incurred (or the rate recovery allowed) and the actual revenues are recorded as regulatory assets (for undercollections) or as regulatory liabilities (for overcollections) to be included in future customer rates each year.  Carrying charges are recovered in rates on all material regulatory tracking mechanisms.

The electric and natural gas distribution companies recover, on a fully reconciling basis, the costs associated with the procurement of energy and natural gas supply, electric transmission related costs from FERC-approved transmission tariffs, energy efficiency programs, low income assistance programs, certain uncollectible accounts receivable for hardship customers, restructuring and stranded costs as a result of deregulation (including securitized RRB charges), certain capital tracking mechanisms for infrastructure improvements, and additionally for the Massachusetts utilities, pension and PBOP benefits, net metering for distributed generation, and solar-related programs.

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CL&P, NSTAR Electric, Yankee Gas, NSTAR Gas, EGMA and the Aquarion Water Company of Connecticut each have a regulatory commission approved revenue decoupling mechanism. Distribution revenues are decoupled from customer sales volumes, where applicable, which breaks the relationship between sales volumes and revenues.  Each company reconciles its annual base distribution rate recovery amount to the pre-established levels of baseline distribution delivery service revenues. Any difference between the allowed level of distribution revenue and the actual amount realized during a 12-month period is adjusted through rates in the following period. 

Income Taxes, Net:  The tax effect of temporary book-tax differences (differences between the periods in which transactions affect income in the financial statements and the periods in which they affect the determination of taxable income, including those differences relating to uncertain tax positions) is accounted for in accordance with the rate-making treatment of the applicable regulatory commissions and accounting guidance for income taxes.  Differences in income taxes between the accounting guidance and the rate-making treatment of the applicable regulatory commissions are recorded as regulatory assets.  As these assets are offset by deferred income tax liabilities, no carrying charge is collected.  The amortization period of these assets varies depending on the nature and/or remaining life of the underlying assets and liabilities.  For further information regarding income taxes, see Note 12, "Income Taxes," to the financial statements.  

Securitized Stranded Costs: In 2018, a subsidiary of PSNH issued $635.7 million of securitized RRBs to finance PSNH's unrecovered remaining costs associated with the divestiture of its generation assets. Securitized regulatory assets, which are not earning an equity return, are being recovered over the amortization period of the associated RRBs. The PSNH RRBs are expected to be repaid by February 1, 2033. For further information, see Note 10, "Rate Reduction Bonds and Variable Interest Entities," to the financial statements.

Goodwill-related:  The goodwill regulatory asset originated from a 1999 transaction, and the DPU allowed its recovery in NSTAR Electric and NSTAR Gas rates.  This regulatory asset is currently being amortized and recovered from customers in rates without a carrying charge over a 40-year period, and as of December 31, 2022, there were 17 years of amortization remaining.

Derivative Liabilities:  Regulatory assets are recorded as an offset to derivative liabilities and relate to the fair value of contracts used to purchase energy and energy-related products that will be recovered from customers in future rates.  These assets are excluded from rate base and are being recovered as the actual settlements occur over the duration of the contracts.  See Note 4, "Derivative Instruments," to the financial statements for further information on these contracts.

Asset Retirement Obligations: The costs associated with the depreciation of the regulated companies' ARO assets and accretion of the ARO liabilities are recorded as regulatory assets in accordance with regulatory accounting guidance. The regulated companies' ARO assets, regulatory assets, and ARO liabilities offset and are excluded from rate base. These costs are being recovered over the life of the underlying property, plant and equipment.

Other Regulatory Assets:  Other Regulatory Assets primarily include environmental remediation costs, certain uncollectible accounts receivable for hardship customers, certain exogenous property taxes and merger-related costs allowed for recovery, contractual obligations associated with the spent nuclear fuel storage costs of the CYAPC, YAEC and MYAPC decommissioned nuclear power facilities, water tank painting costs, losses associated with the reacquisition or redemption of long-term debt, and various other items.

Regulatory Costs in Long-Term Assets:  Eversource's regulated companies had $210.8 million (including $135.9 million for CL&P, $19.8 million for NSTAR Electric and $1.0 million for PSNH) and $252.5 million (including $114.9 million for CL&P, $85.0 million for NSTAR Electric and $3.4 million for PSNH) of additional regulatory costs as of December 31, 2022 and 2021, respectively, that were included in long-term assets on the balance sheets.  These amounts represent incurred costs for which recovery has not yet been specifically approved by the applicable regulatory agency.  However, based on regulatory policies or past precedent on similar costs, management believes it is probable that these costs will ultimately be approved and recovered from customers in rates.  As of December 31, 2022 and 2021, these regulatory costs included incremental COVID-19 related non-tracked uncollectible expense deferred of $29.8 million and $33.0 million at Eversource, $11.8 million and $18.0 million at CL&P, and $2.2 million and $6.1 million at NSTAR Electric, respectively.

Equity Return on Regulatory Assets:  For rate-making purposes, the regulated companies recover the carrying costs related to their regulatory assets.  For certain regulatory assets, the carrying cost recovered includes an equity return component.  This equity return is not recorded on the balance sheets. The equity return for PSNH was $4.1 million and $5.0 million as of December 31, 2022 and 2021, respectively. These carrying costs will be recovered from customers in future rates.  

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Regulatory Liabilities:  The components of regulatory liabilities were as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
EDIT due to Tax Cuts and Jobs Act of 2017	$	2,619.3	$	983.6	$	944.3	$	348.6	$	2,685.2	$	996.1	$	984.5	$	359.2
Cost of Removal	670.6		130.8		405.3		14.7		649.6		100.1		381.0		17.2
Regulatory Tracking Mechanisms	890.8		361.0		336.1		155.0		448.4		182.0		185.1		107.0
Deferred Portion of Non-Service Income    Components of Pension, SERP and PBOP	270.9		34.5		139.7		28.8		148.3		12.0		90.7		14.9
Benefit Costs	55.4		0.7		31.4		—		133.5		—		107.4		—
AFUDC - Transmission	98.2		48.2		50.0		—		81.0		43.2		37.8		—
CL&P Settlement Agreement and Storm    Performance Penalty	—		—		—		—		81.3		81.3		—		—
Other Regulatory Liabilities	215.9		40.6		14.5		6.5		241.4		45.1		0.8		3.3
Total Regulatory Liabilities	4,821.1		1,599.4		1,921.3		553.6		4,468.7		1,459.8		1,787.3		501.6
Less:  Current Portion	890.8		336.0		373.2		162.0		602.4		266.5		228.2		120.2
Total Long-Term Regulatory Liabilities	$	3,930.3	$	1,263.4	$	1,548.1	$	391.6	$	3,866.3	$	1,193.3	$	1,559.1	$	381.4

EDIT due to Tax Cuts and Jobs Act of 2017: Pursuant to the Tax Cuts and Jobs Act of 2017, Eversource had remeasured its existing deferred federal income tax balances to reflect the decrease in the U.S. federal corporate income tax rate from 35 percent to 21 percent. The remeasurement resulted in provisional regulated excess accumulated deferred income tax (excess ADIT or EDIT) liabilities that will benefit customers in future periods and were recognized as regulatory liabilities on the balance sheet. EDIT liabilities related to property, plant, and equipment are subject to IRS normalization rules and will be returned to customers using the same timing as the remaining useful lives of the underlying assets that gave rise to the ADIT liabilities. Eversource's regulated companies (except for the Connecticut water business) are in the process of refunding the EDIT liabilities to customers based on orders issued by applicable state and federal regulatory commissions.

Cost of Removal:  Eversource's regulated companies currently recover amounts in rates for future costs of removal of plant assets over the lives of the assets.  The estimated cost to remove utility assets from service is recognized as a component of depreciation expense, and the cumulative amount collected from customers but not yet expended is recognized as a regulatory liability.  

Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP:  Regulatory liabilities were recorded for the deferred portion of the non-service related components of net periodic benefit expense/(income) for the Pension, SERP and PBOP Plans. These regulatory liabilities will be amortized over the remaining useful lives of the various classes of utility property, plant and equipment.

AFUDC - Transmission:  Regulatory liabilities were recorded by CL&P and NSTAR Electric for AFUDC accrued on certain reliability-related transmission projects to reflect local rate base recovery.  These regulatory liabilities will be amortized over the depreciable life of the related transmission assets.

CL&P Settlement Agreement and Storm Performance Penalty:  On April 28, 2021, PURA issued a final decision on CL&P’s compliance with its emergency response plan that concluded CL&P failed to comply with certain storm performance standards and was imprudent in certain instances. A $28.4 million performance penalty assessed by PURA was recorded within current regulatory liabilities on CL&P’s balance sheet and was credited to customers on electric bills beginning on September 1, 2021 over a one-year period. On October 1, 2021, CL&P entered into a settlement agreement with the DEEP, Office of Consumer Counsel, Office of the Attorney General and the Connecticut Industrial Energy Consumers, resolving certain issues that arose in then-pending regulatory proceedings initiated by PURA. PURA approved the settlement agreement on October 27, 2021. CL&P recorded a current regulatory liability of $75 million on the balance sheet associated with the provisions of the settlement agreement. Customer credits of $65 million were distributed based on customer sales over a two-month billing period from December 1, 2021 to January 31, 2022. CL&P also irrevocably set aside $10 million in a customer assistance fund to provide bill payment assistance to certain existing non-hardship and hardship customers carrying arrearages. Those customers were provided with $10 million of bill forgiveness in the first quarter of 2022. The balance as of December 31, 2021 represented the reserve for customer credits not yet issued and bill payment assistance not yet provided. See Note 13G, “Commitments and Contingencies - CL&P Regulatory Matters,” for further information.

Other Regulatory Liabilities:  Other Regulatory Liabilities primarily include EGMA’s acquired regulatory liability as a result of the 2020 DPU-approved rate settlement agreement and the CMA asset acquisition on October 9, 2020, and various other items.

FERC ROE Complaints:  As of December 31, 2022, Eversource has a reserve established for the second ROE complaint period in the pending FERC ROE complaint proceedings, which was recorded as a regulatory liability and is reflected within Regulatory Tracking Mechanisms in the table above.  The cumulative pre-tax reserve (excluding interest) as of December 31, 2022 totaled $39.1 million for Eversource (including $21.4 million for CL&P, $14.6 million for NSTAR Electric and $3.1 million for PSNH). See Note 13E, "Commitments and Contingencies – FERC ROE Complaints," for further information on developments in the pending ROE complaint proceedings.

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Recent Regulatory Developments:

CL&P Rate Relief Plan: On November 28, 2022, Governor Lamont, DEEP, Office of Consumer Counsel, and CL&P jointly developed a rate relief plan for electric customers for the winter peak season of January 1, 2023 through April 30, 2023. On December 16, 2022, PURA approved the rate relief plan. As part of the rate relief plan, CL&P reduced the Non-Bypassable Federally Mandated Congestion Charge (NBFMCC) rate effective January 1, 2023 to provide customers with an average $10 monthly bill credit from January through April 2023. This rate reduction accelerates the return to customers of net revenues generated by long-term state-approved energy contracts with the Millstone and Seabrook nuclear power plants of approximately $90 million. The rate relief plan also included instituting a temporary, flat monthly discount for qualifying low-income hardship customers effective January 1, 2023. This flat-rate credit will continue until a new low-income discount rate that was approved by PURA in an October 19, 2022 decision is implemented in 2024. These aspects of the rate relief plan do not impact CL&P’s earnings but do impact its future cash flows. Also as part of the rate relief plan, CL&P committed to contribute $10 million to an energy assistance program for qualifying hardship customers, which is expected to be distributed as a bill credit to those customers by the end of the first quarter of 2023. CL&P recorded a current liability of $10 million on the balance sheet and a charge to expense on the statement of income for the year ended December 31, 2022 associated with the customer assistance program.

NSTAR Electric Distribution Rate Case: On November 30, 2022, the DPU issued its decision in the NSTAR Electric distribution rate case and approved a base distribution rate increase of $64 million effective January 1, 2023. The DPU approved a renewal of the performance-based ratemaking (PBR) plan originally authorized in its previous rate case for a five-year term, with a corresponding stay out provision. The PBR plan term has the possibility of a five-year extension. The PBR mechanism allows for an annual adjustment to base distribution rates for inflation and exogenous events. The DPU also allowed for adjustments to the PBR mechanism for the recovery of future capital additions based on a historical five-year average of total capital additions, beginning with the January 1, 2024 PBR adjustment. The decision allows an authorized regulatory ROE of 9.80 percent on a capital structure including 53.2 percent equity.

Among other items, the DPU approved an increase to the annual storm fund contribution collected through base distribution rates from $10 million to $31 million, and allowed for the recovery of storm threshold costs of $1.3 million per storm event subsequent to the eighth storm in a calendar year (six recovered in base rates plus two additional storms). The DPU approved cost recovery of a portion of NSTAR Electric’s outstanding storm costs beginning on January 1, 2023 and January 1, 2024, subject to reconciliation from future prudency reviews. In a subsequent compliance filing, the DPU allowed recovery to commence for outstanding storm costs occurring between 2018 and 2022 and interest in a total of $162.1 million over a five-year period starting January 1, 2023. In addition, NSTAR Electric will begin to recover 2021 exogenous storms and interest in a total of $220.9 million over a five-year period beginning January 1, 2024. The DPU also approved the recovery of historical exogenous property taxes of $30.8 million incurred from 2020 through 2022 over a two-year period and $8.3 million incurred from 2012 through 2015 over a five-year period effective January 1, 2023. As a result of this decision, these deferred property taxes were reclassified from Other Long-Term Assets to Regulatory Assets on the NSTAR Electric balance sheet.

NSTAR Gas Distribution Rates: As part of an inflation-based mechanism, NSTAR Gas submitted its second annual Performance Based Rate Adjustment filing on September 15, 2022 and on October 31, 2022, the DPU approved a $21.7 million increase to base distribution rates for effect on November 1, 2022. The increase is inclusive of a $4.5 million permanent increase related to exogenous property taxes and a $5.4 million increase related to an October 6, 2021 mitigation plan filing that delayed recovery of a portion of a base distribution rate increase originally scheduled to take effect November 1, 2021. The DPU also approved the recovery of historical exogenous property taxes incurred from November 1, 2020 through October 31, 2022 of $8.2 million over a two-year period through a separate reconciling mechanism effective November 1, 2022. As a result of this decision, these deferred property taxes were reclassified from Other Long-Term Assets to Regulatory Assets on the Eversource balance sheet.

EGMA Distribution Rates: As established in an October 7, 2020 EGMA Rate Settlement Agreement approved by the DPU, on September 16, 2022 EGMA filed for its second base distribution rate increase and on October 31, 2022, the DPU approved a $6.7 million increase to base distribution rates and a $3.3 million increase to the Tax Act Credit Factor for effect on November 1, 2022. The DPU also approved the recovery of historical exogenous property taxes incurred from November 1, 2020 through October 31, 2022 of $8.6 million over a two-year period through a separate reconciling mechanism effective November 1, 2022. EGMA will request recovery of incremental property taxes incurred after October 31, 2022 in future exogenous filings. As a result of this decision, these deferred property taxes were reclassified from Other Long-Term Assets to Regulatory Assets on the Eversource balance sheet.

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3.     PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION

Utility property, plant and equipment is recorded at original cost.  Original cost includes materials, labor, construction overheads and AFUDC for regulated property.  The cost of repairs and maintenance is charged to Operations and Maintenance expense as incurred.  

The following tables summarize property, plant and equipment by asset category:

Eversource	As of December 31,
(Millions of Dollars)	2022		2021
Distribution - Electric	$	18,326.2	$	17,679.1
Distribution - Natural Gas	7,443.8		6,694.8
Transmission - Electric	13,709.3		12,882.4
Distribution - Water	2,112.6		1,900.9
Solar	200.8		200.9
Utility	41,792.7		39,358.1
Other (1)	1,738.1		1,469.5
Property, Plant and Equipment, Gross	43,530.8		40,827.6
Less:  Accumulated Depreciation
Utility	(9,167.4)		(8,885.2)
Other	(706.1)		(580.1)
Total Accumulated Depreciation	(9,873.5)		(9,465.3)
Property, Plant and Equipment, Net	33,657.3		31,362.3
Construction Work in Progress	2,455.5		2,015.4
Total Property, Plant and Equipment, Net	$	36,112.8	$	33,377.7

	As of December 31,
	2022						2021
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Distribution - Electric	$	7,370.1	$	8,410.0	$	2,586.4	$	7,117.6	$	8,105.5	$	2,496.2
Transmission - Electric	6,165.1		5,333.8		2,212.0		5,859.0		5,090.5		1,934.6
Solar	—		200.8		—		—		200.9		—
Property, Plant and Equipment, Gross	13,535.2		13,944.6		4,798.4		12,976.6		13,396.9		4,430.8
Less:  Accumulated Depreciation	(2,567.1)		(3,381.2)		(912.3)		(2,572.1)		(3,227.3)		(908.4)
Property, Plant and Equipment, Net	10,968.1		10,563.4		3,886.1		10,404.5		10,169.6		3,522.4
Construction Work in Progress	498.9		1,063.6		174.1		399.0		707.0		134.1
Total Property, Plant and Equipment, Net	$	11,467.0	$	11,627.0	$	4,060.2	$	10,803.5	$	10,876.6	$	3,656.5

(1)These assets are primarily comprised of computer software, hardware and equipment at Eversource Service and buildings at The Rocky River Realty Company.

Depreciation: Depreciation of utility assets is calculated on a straight-line basis using composite rates based on the estimated remaining useful lives of the various classes of property (estimated useful life for PSNH distribution and the water utilities).  The composite rates, which are subject to approval by the appropriate state regulatory agency, include a cost of removal component, which is collected from customers over the lives of the plant assets and is recognized as a regulatory liability.  Depreciation rates are applied to property from the time it is placed in service.

Upon retirement from service, the cost of the utility asset is charged to the accumulated provision for depreciation.  The actual incurred removal costs are applied against the related regulatory liability.  

The depreciation rates for the various classes of utility property, plant and equipment aggregate to composite rates as follows:

(Percent)	2022		2021		2020
Eversource	3.0	%	3.1	%	3.0	%
CL&P	2.8	%	2.8	%	2.8	%
NSTAR Electric	2.7	%	2.8	%	2.8	%
PSNH	3.0	%	3.1	%	2.8	%

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The following table summarizes average remaining useful lives of depreciable assets:

	As of December 31, 2022
(Years)	Eversource	CL&P	NSTAR Electric	PSNH
Distribution - Electric	34.2	35.0	34.6	30.8
Distribution - Natural Gas	37.4	—	—	—
Transmission - Electric	39.8	36.3	45.2	39.3
Distribution - Water	39.0	—	—	—
Solar	22.9	—	22.9	—
Other (1)	11.0	—	—	—

(1)The estimated useful life of computer software, hardware and equipment primarily ranges from 5 to 15 years and of buildings is 40 years.

4.     DERIVATIVE INSTRUMENTS

The electric and natural gas companies purchase and procure energy and energy-related products, which are subject to price volatility, for their customers.  The costs associated with supplying energy to customers are recoverable from customers in future rates.  These regulated companies manage the risks associated with the price volatility of energy and energy-related products through the use of derivative and non-derivative contracts.

Many of the derivative contracts meet the definition of, and are designated as, normal and qualify for accrual accounting under the applicable accounting guidance.  The costs and benefits of derivative contracts that meet the definition of normal are recognized in Operating Expenses on the statements of income as electricity or natural gas is delivered.

Derivative contracts that are not designated as normal are recorded at fair value as current or long-term Derivative Assets or Derivative Liabilities on the balance sheets.  For the electric and natural gas companies, regulatory assets or regulatory liabilities are recorded to offset the fair values of derivatives, as contract settlement amounts are recovered from, or refunded to, customers in their respective energy supply rates.  

The gross fair values of derivative assets and liabilities with the same counterparty are offset and reported as net Derivative Assets or Derivative Liabilities, with current and long-term portions, on the balance sheets.  The following table presents the gross fair values of contracts, categorized by risk type, and the net amounts recorded as current or long-term derivative assets or liabilities:

		As of December 31,
		2022						2021
CL&P (Millions of Dollars)	Fair Value Hierarchy	Commodity Supply and Price Risk Management		Netting (1)		Net Amount Recorded as a Derivative		Commodity Supply and Price Risk Management		Netting (1)		Net Amount Recorded as a Derivative
Current Derivative Assets	Level 3	$	16.3	$	(0.5)	$	15.8	$	14.7	$	(1.0)	$	13.7
Long-Term Derivative Assets	Level 3	28.8		(0.9)		27.9		46.9		(0.9)		46.0
Current Derivative Liabilities	Level 3	(81.6)		—		(81.6)		(73.5)		—		(73.5)
Long-Term Derivative Liabilities	Level 3	(143.9)		—		(143.9)		(235.4)		—		(235.4)

(1)     Amounts represent derivative assets and liabilities that Eversource elected to record net on the balance sheets.  These amounts are subject to master netting agreements or similar agreements for which the right of offset exists.

The business activities that result in the recognition of derivative assets also create exposure to various counterparties.  As of December 31, 2022, CL&P's derivative assets were exposed to counterparty credit risk and contracted with investment grade entities.

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 December 31, 2022 and 2021 were 674 MW and 675 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 years ended December 31, 2022, 2021 and 2020, there were gains of $10.1 million and losses of $7.1 million and $21.2 million, respectively, deferred as regulatory costs, which reflect the change in fair value associated with Eversource's derivative contracts.

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Fair Value Measurements of Derivative Instruments

The fair value of derivative contracts classified as Level 3 utilizes both significant observable and unobservable inputs.  The fair value is modeled using income techniques, such as discounted cash flow valuations adjusted for assumptions related to exit price. Valuations of derivative contracts using a discounted cash flow methodology include assumptions regarding the timing and likelihood of scheduled payments and also reflect non-performance risk, including credit, using the default probability approach based on the counterparty’s credit rating for assets and the Company’s credit rating for liabilities.  Significant observable inputs for valuations of these contracts include energy-related product prices in future years for which quoted prices in an active market exist. Valuations incorporate estimates of premiums or discounts that would be required by a market participant to arrive at an exit price, using historical market transactions adjusted for the terms of the contract.  Fair value measurements categorized in Level 3 of the fair value hierarchy are prepared by individuals with expertise in valuation techniques, pricing of energy-related products, and accounting requirements.    

The following is a summary of the significant unobservable inputs utilized in the valuations of the derivative contracts classified as Level 3:

	As of December 31,
	2022								2021
CL&P	Range				Average			Period Covered	Range				Average			Period Covered
Forward Reserve Prices	$	0.44	—	$0.50	$	0.47	per kW-Month	2023 - 2024	$	0.50	—	$1.15	$	0.82	per kW-Month	2022 - 2024

Exit price premiums of 2.9 percent through 7.1 percent, or a weighted average of 6.1 percent, are also Level 3 significant unobservable inputs applied to these contracts and reflect the uncertainty and illiquidity premiums that would be required based on the most recent market activity available for similar type contracts. The risk premium was weighted by the relative fair value of the net derivative instruments.

As of December 31, 2021, Level 3 unobservable inputs also utilized in the valuation of CL&P’s capacity-related contracts included capacity prices of $2.61 per kW-Month over the period 2025 through 2026. Beginning in the first quarter of 2022, these capacity price inputs are now observable.

Significant increases or decreases in future capacity or forward reserve prices in isolation would decrease or increase, respectively, the fair value of the derivative liability.  Any increases in risk premiums would increase the fair value of the derivative liability.  Changes in these fair values are recorded as a regulatory asset or liability and do not impact net income.  

The following table presents changes in the Level 3 category of derivative assets and derivative liabilities measured at fair value on a recurring basis.  The derivative assets and liabilities are presented on a net basis.

CL&P (Millions of Dollars)	For the Years Ended December 31,
	2022		2021
Derivatives, Net:
Fair Value as of Beginning of Period	$	(249.2)	$	(293.1)
Net Realized/Unrealized Gains/(Losses) Included in Regulatory Assets	10.1		(8.5)
Settlements	57.3		52.4
Fair Value as of End of Period	$	(181.8)	$	(249.2)

5.     MARKETABLE SECURITIES

Eversource holds marketable securities that are primarily used to fund certain non-qualified executive benefits.  The trusts that hold these marketable securities are not subject to regulatory oversight by state or federal agencies.  Eversource’s marketable securities also include the CYAPC and YAEC legally restricted trusts that each hold equity and available-for-sale debt securities to fund the spent nuclear fuel removal obligations of their nuclear fuel storage facilities. Equity and available-for-sale debt marketable securities are recorded at fair value, with the current portion recorded in Prepayments and Other Current Assets and the long-term portion recorded in Marketable Securities on the balance sheets.

Equity Securities: Unrealized gains and losses on equity securities held in Eversource's non-qualified executive benefit trust are recorded in Other Income, Net on the statements of income. The fair value of these equity securities as of December 31, 2022 and 2021 was $20.0 million and $40.2 million, respectively.  For the years ended December 31, 2022, 2021 and 2020, there were unrealized losses of $9.7 million and unrealized gains of $4.4 million and $3.7 million recorded in Other Income, Net related to these equity securities, respectively.

Eversource's equity securities also include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts, which had fair values of $170.1 million and $214.0 million as of December 31, 2022 and 2021, respectively.  Unrealized gains and losses for these spent nuclear fuel trusts are subject to regulatory accounting treatment and are recorded in Marketable Securities with the corresponding offset to long-term liabilities on the balance sheets, with no impact on the statements of income.

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Available-for-Sale Debt Securities:  The following is a summary of the available-for-sale debt securities:

	As of December 31,
	2022								2021
Eversource (Millions of Dollars)	Amortized Cost		Pre-Tax Unrealized Gains		Pre-Tax Unrealized Losses		Fair Value		Amortized Cost		Pre-Tax Unrealized Gains		Pre-Tax Unrealized Losses		Fair Value
Debt Securities	$	201.6	$	0.1	$	(16.2)	$	185.5	$	214.5	$	5.1	$	(0.2)	$	219.4

Unrealized gains and losses on available-for-sale debt securities held in Eversource's non-qualified executive benefit trust are recorded in Accumulated Other Comprehensive Income, excluding amounts related to credit losses or losses on securities intended to be sold, which are recorded in Other Income, Net. There have been no credit losses for the years ended December 31, 2022 and 2021, and no allowance for credit losses as of December 31, 2022. Factors considered in determining whether a credit loss exists include adverse conditions specifically affecting the issuer, the payment history, ratings and rating changes of the security, and the severity of the impairment.  For asset-backed debt securities, underlying collateral and expected future cash flows are also evaluated. Debt securities included in Eversource's non-qualified benefit trust portfolio are investment-grade bonds with a lower default risk based on their credit quality.

Eversource's debt securities also include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts in the amounts of $163.2 million and $189.9 million as of December 31, 2022 and 2021, respectively. 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. Pre-tax unrealized gains and losses as of December 31, 2022 and 2021 primarily relate to the debt securities included in CYAPC's and YAEC's spent nuclear fuel trusts.

As of December 31, 2022, the contractual maturities of available-for-sale debt securities were as follows:    

Eversource (Millions of Dollars)	Amortized Cost		Fair Value
Less than one year (1)	$	28.5	$	28.3
One to five years	43.8		42.4
Six to ten years	35.6		32.3
Greater than ten years	93.7		82.5
Total Debt Securities	$	201.6	$	185.5

(1)     Amounts in the Less than one year category include securities in the CYAPC and YAEC spent nuclear fuel trusts, which are restricted and are classified in long-term Marketable Securities on the balance sheets.

Realized Gains and Losses:  Realized gains and losses are recorded in Other Income, Net for Eversource's benefit trust and are offset in long-term liabilities for CYAPC and YAEC.  Eversource utilizes the specific identification basis method for the Eversource non-qualified benefit trust, and the average cost basis method for the CYAPC and YAEC spent nuclear fuel trusts to compute the realized gains and losses on the sale of marketable securities.

Fair Value Measurements:  The following table presents the marketable securities recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy:

Eversource (Millions of Dollars)	As of December 31,
	2022		2021
Level 1:
Mutual Funds and Equities	$	190.1	$	254.2
Money Market Funds	25.4		31.3
Total Level 1	$	215.5	$	285.5
Level 2:
U.S. Government Issued Debt Securities (Agency and Treasury)	$	82.3	$	81.3
Corporate Debt Securities	46.1		65.3
Asset-Backed Debt Securities	8.6		12.6
Municipal Bonds	12.7		12.3
Other Fixed Income Securities	10.4		16.6
Total Level 2	$	160.1	$	188.1
Total Marketable Securities	$	375.6	$	473.6

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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.

6.     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 as of December 31,
(Millions of Dollars)	Ownership Interest		2022		2021
Offshore Wind Business - North East Offshore	50	%	$	1,947.1	$	1,213.6
Natural Gas Pipeline - Algonquin Gas Transmission, LLC	15	%	118.8		121.9
Renewable Energy Investment Fund	90	%	84.1		76.5
Other	various		26.1		24.3
Total Investments in Unconsolidated Affiliates			$	2,176.1	$	1,436.3

For the years ended December 31, 2022, 2021 and 2020, Eversource had equity in earnings of unconsolidated affiliates of $22.9 million, $14.2 million, and $14.2 million, respectively. Eversource received dividends from its equity method investees of $26.2 million, $21.6 million, and $21.8 million, respectively, for the years ended December 31, 2022, 2021 and 2020.

Investments in affiliates where Eversource has the ability to exercise significant influence, but not control, over an investee are initially recognized as an equity method investment at cost. Any differences between the cost of an investment and the amount of underlying equity in net assets of an investee are considered basis differences, and are determined based upon the estimated fair values of the investee's identifiable assets and liabilities. The carrying amount of Eversource’s offshore wind investments exceeded its share of underlying equity in net assets by $343.1 million and $300.4 million, respectively, as of December 31, 2022 and 2021. As of December 31, 2022, these basis differences are primarily comprised of $168.9 million of equity method goodwill that is not being amortized, intangible assets for PPAs, and capitalized interest.

Offshore Wind Business: Eversource's offshore wind business includes a 50 percent ownership interest in North East Offshore, which holds PPAs and contracts for the Revolution Wind, South Fork Wind and Sunrise Wind projects, as well as an undeveloped offshore lease area. The offshore wind investment includes capital expenditures for the three offshore wind projects, as well as capitalized costs related to future development, acquisition costs of offshore lease areas, and capitalized interest. Cash flows used in investing activities presented in Investments in Unconsolidated Affiliates on the statements of cash flows primarily relates to capital contributions in the offshore wind investment.

On May 4, 2022, Eversource announced that it had initiated a strategic review of its offshore wind investment portfolio. As part of that review, Eversource is exploring strategic alternatives that could result in a potential sale of all, or part, of its 50 percent interest in its offshore wind partnership with Ørsted. In late July, Eversource started preliminary and targeted outreach to interested parties. Eversource continues to work with interested parties through this ongoing process and expects to complete this review in the second quarter of 2023. Eversource’s strategic review of its offshore wind investment does not impact the presentation of the December 31, 2022 financial statements.

NSTAR Electric: As of December 31, 2022 and 2021, NSTAR Electric's investments included a 14.5 percent ownership interest in two companies that transmit hydro-electricity imported from the Hydro-Quebec system in Canada of $9.3 million and $9.0 million, respectively.

Impairment of Equity Method Investments: Equity method investments are assessed for impairment when conditions exist that indicate that the fair value of the investment is less than book value. If the decline in value is considered to be other-than-temporary, the investment is written down to its estimated fair value, which establishes a new cost basis in the investment. Impairment evaluations involve a significant degree of judgment and estimation, including identifying circumstances that indicate an impairment may exist at the equity method investment level, selecting discount rates used to determine fair values, and developing an estimate of discounted future cash flows expected from investment operations or the sale of the investment. No impairments occurred during the year 2022. Eversource continually monitors and evaluates its equity method investments to determine if there are indicators of an other-than-temporary impairment.

Eversource believes that the fair market value of its offshore wind investment is greater than the carrying value based upon management’s expectation for future cash flows arising from the sale of all, or part, of its investment. There are uncertainties in a sale process, and there could be changes in market conditions that would impact Eversource’s ability to sell this investment or the value it would receive for these assets. In the event that the strategic review does not result in the sale of the offshore wind business or that a sale of the offshore wind business is significantly delayed or at lower than expected value from these changes in market conditions driven by unfavorable developments, such as scheduling or permitting delays, increases in cost estimates, changes to tax laws impacting the project’s ability to monetize tax attributes, higher interest rates, and increases in the discount rate, it could result in Eversource having to evaluate whether or not its investment is impaired. Any resulting impairment charge could have a material adverse effect on the financial position and results of operations.

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During the year ended December 31, 2020, Eversource recorded an other-than-temporary impairment of $2.8 million within Other Income, Net on the statement of income, related to a write-off of an investment within a renewable energy fund.

7.     ASSET RETIREMENT OBLIGATIONS

Eversource, including CL&P, NSTAR Electric and PSNH, recognizes a liability for the fair value of an ARO on the obligation date if the liability's fair value can be reasonably estimated, even if it is conditional on a future event.  Settlement dates and future costs are reasonably estimated when sufficient information becomes available.  Management has identified various categories of AROs, primarily CYAPC's and YAEC's obligation to dispose of spent nuclear fuel and high level waste, and also certain assets containing asbestos and hazardous contamination. Management has performed fair value calculations reflecting expected probabilities for settlement scenarios.

The fair value of an ARO is recorded as a long-term liability with a corresponding amount included in Property, Plant and Equipment, Net on the balance sheets.  The ARO assets are depreciated, and the ARO liabilities are accreted over the estimated life of the obligation and the corresponding credits are recorded as accumulated depreciation and ARO liabilities, respectively.  As the electric and natural gas companies are rate-regulated on a cost-of-service basis, these companies apply regulatory accounting guidance and both the depreciation and accretion costs associated with these companies' AROs are recorded as increases to Regulatory Assets on the balance sheets.  

A reconciliation of the beginning and ending carrying amounts of ARO liabilities is as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Balance as of Beginning of Year	$	500.1	$	35.0	$	97.5	$	4.7	$	499.7	$	33.4	$	91.8	$	4.4
Liabilities Settled During the Year	(22.3)		—		—		—		(23.9)		(0.6)		—		—
Accretion	28.9		2.4		4.1		0.2		29.4		2.2		4.0		0.3
Revisions in Estimated Cash Flows	(4.0)		—		(0.3)		—		(5.1)		—		1.7		—
Balance as of End of Year	$	502.7	$	37.4	$	101.3	$	4.9	$	500.1	$	35.0	$	97.5	$	4.7

Eversource's amounts include CYAPC and YAEC's AROs of $320.5 million and $325.9 million as of December 31, 2022 and 2021, respectively. The fair value of the ARO for CYAPC and YAEC includes uncertainties of the fuel off-load dates related to the DOE's timing of performance regarding its obligation to dispose of the spent nuclear fuel and high level waste and other assumptions, including discount rates.  The incremental asset recorded as an offset to the ARO liability was fully depreciated since the plants have no remaining useful life.  Any changes in the ARO liability are recorded with a corresponding offset to the related regulatory asset.  The assets held in the CYAPC and YAEC spent nuclear fuel trusts are restricted for settling the ARO and all other nuclear fuel storage obligations.  For further information on the assets held in the spent nuclear fuel trusts, see Note 5, "Marketable Securities," to the financial statements.

8.     SHORT-TERM DEBT

Short-Term Debt - Borrowing Limits:  The amount of short-term borrowings that may be incurred by CL&P and NSTAR Electric is subject to periodic approval by the FERC.  Because the NHPUC has jurisdiction over PSNH's short-term debt, PSNH is not currently required to obtain FERC approval for its short-term borrowings.  On December 3, 2021, the FERC granted authorization that allows CL&P to issue total short-term borrowings in an aggregate principal amount not to exceed $600 million outstanding at any one time, through December 31, 2023.  On December 3, 2021, the FERC granted authorization that allows NSTAR Electric to issue total short-term borrowings in an aggregate principal amount not to exceed $655 million outstanding at any one time, through December 31, 2023.

PSNH is authorized by regulation of the NHPUC to incur short-term borrowings up to 10 percent of net fixed plant plus an additional $60 million until further ordered by the NHPUC.  As of December 31, 2022, PSNH's short-term debt authorization under the 10 percent of net fixed plant test plus $60 million totaled $443.5 million.

CL&P's certificate of incorporation contains preferred stock provisions restricting the amount of unsecured debt that CL&P may incur, including limiting unsecured indebtedness with a maturity of less than 10 years to 10 percent of total capitalization.  As of December 31, 2022, CL&P had $1.01 billion of unsecured debt capacity available under this authorization.

Yankee Gas, NSTAR Gas and EGMA are not required to obtain approval from any state or federal authority to incur short-term debt.

Short-Term Debt - Commercial Paper Programs and Credit Agreements: Eversource parent has a $2.00 billion commercial paper program allowing Eversource parent to issue commercial paper as a form of short-term debt. Eversource parent, CL&P, PSNH, NSTAR Gas, Yankee Gas, EGMA and Aquarion Water Company of Connecticut are parties to a five-year $2.00 billion revolving credit facility, which terminates on October 15, 2027. This revolving credit facility serves to backstop Eversource parent's $2.00 billion commercial paper program.

NSTAR Electric has a $650 million commercial paper program allowing NSTAR Electric to issue commercial paper as a form of short-term debt. NSTAR Electric is also a party to a five-year $650 million revolving credit facility, which terminates on October 15, 2027. This revolving credit facility serves to backstop NSTAR Electric's $650 million commercial paper program.

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The amount of borrowings outstanding and available under the commercial paper programs were as follows:

	Borrowings Outstanding  as of December 31,				Available Borrowing Capacity as of December 31,				Weighted-Average Interest Rate as of December 31,
(Millions of Dollars)	2022		2021		2022		2021		2022		2021
Eversource Parent Commercial Paper Program	$	1,442.2	$	1,343.0	$	557.8	$	657.0	4.63	%	0.31	%
NSTAR Electric Commercial Paper Program	—		162.5		650.0		487.5		—	%	0.14	%

There were no borrowings outstanding on the revolving credit facilities as of December 31, 2022 or 2021.

CL&P and PSNH have uncommitted line of credit agreements totaling $450 million and $300 million, respectively, which will expire on May 12, 2023. There are no borrowings outstanding on either the CL&P or PSNH uncommitted line of credit agreements as of December 31, 2022.

Amounts outstanding under the commercial paper programs are included in Notes Payable and classified in current liabilities on the Eversource and NSTAR Electric balance sheets, as all borrowings are outstanding for no more than 364 days at one time.

Under the credit facilities described above, Eversource and its subsidiaries, including CL&P, NSTAR Electric, PSNH, NSTAR Gas, EGMA, Yankee Gas, and Aquarion Water Company of Connecticut, must comply with certain financial and non-financial covenants, including a consolidated debt to total capitalization ratio.  As of December 31, 2022 and 2021, Eversource and its subsidiaries were in compliance with these covenants. If Eversource or its subsidiaries were not in compliance with these covenants, an event of default would occur requiring all outstanding borrowings by such borrower to be repaid, and additional borrowings by such borrower would not be permitted under its respective credit facility.

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 December 31, 2022, there were intercompany loans from Eversource parent to PSNH of $173.3 million. As of December 31, 2021, there were intercompany loans from Eversource parent to PSNH of $110.6 million. Intercompany loans from Eversource parent are included in Notes Payable to Eversource Parent and classified in current liabilities on the respective subsidiary's balance sheets.

Sources and Uses of Cash: The Company expects the future operating cash flows of Eversource, CL&P, NSTAR Electric and PSNH, along with existing borrowing availability and access to both debt and equity markets, will be sufficient to meet any working capital and future operating requirements, and capital investment forecasted opportunities.

9.    LONG-TERM DEBT

Details of long-term debt outstanding are as follows:

CL&P (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
First Mortgage Bonds:
1994 Series D due 2024	7.875	%	$	139.8	$	139.8
2004 Series B due 2034	5.750	%	130.0		130.0
2005 Series B due 2035	5.625	%	100.0		100.0
2006 Series A due 2036	6.350	%	250.0		250.0
2007 Series B due 2037	5.750	%	150.0		150.0
2007 Series D due 2037	6.375	%	100.0		100.0
2013 Series A due 2023	2.500	%	400.0		400.0
2014 Series A due 2044	4.300	%	475.0		475.0
2015 Series A due 2045	4.150	%	350.0		350.0
2017 Series A due 2027	3.200	%	500.0		500.0
2018 Series A due 2048	4.000	%	800.0		800.0
2020 Series A due 2025	0.750	%	400.0		400.0
2021 Series A due 2031	2.050	%	425.0		425.0
Total First Mortgage Bonds			4,219.8		4,219.8
Less Amounts due Within One Year			(400.0)		—
Current Portion Classified as Long-Term Debt (1)			400.0		—
Unamortized Premiums and Discounts, Net			21.5		23.1
Unamortized Debt Issuance Costs			(24.8)		(27.5)
CL&P Long-Term Debt			$	4,216.5	$	4,215.4

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NSTAR Electric (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
Debentures:
2006 Debentures due 2036	5.750	%	$	200.0	$	200.0
2010 Debentures due 2040	5.500	%	300.0		300.0
2012 Debentures due 2022	2.375	%	—		400.0
2014 Debentures due 2044	4.400	%	300.0		300.0
2015 Debentures due 2025	3.250	%	250.0		250.0
2016 Debentures due 2026	2.700	%	250.0		250.0
2017 Debentures due 2027	3.200	%	700.0		700.0
2019 Debentures due 2029	3.250	%	400.0		400.0
2020 Debentures due 2030	3.950	%	400.0		400.0
2021 Debentures due 2051	3.100	%	300.0		300.0
2021 Debentures due 2031	1.950	%	300.0		300.0
2022 Debentures due 2052	4.550	%	450.0		—
2022 Debentures due 2052	4.950	%	400.0		—
Total Debentures			4,250.0		3,800.0
Notes:
2004 Senior Notes Series B due 2034	5.900	%	50.0		50.0
2007 Senior Notes Series D due 2037	6.700	%	40.0		40.0
2013 Senior Notes Series G due 2023	3.880	%	80.0		80.0
2016 Senior Notes Series H due 2026	2.750	%	50.0		50.0
Total Notes			220.0		220.0
Less Amounts due Within One Year			(80.0)		(400.0)
Unamortized Premiums and Discounts, Net			(14.8)		(11.2)
Unamortized Debt Issuance Costs			(30.1)		(23.4)
NSTAR Electric Long-Term Debt			$	4,345.1	$	3,585.4

PSNH (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
First Mortgage Bonds:
2005 Series M due 2035	5.600	%	$	50.0	$	50.0
2013 Series S due 2023	3.500	%	325.0		325.0
2019 Series T due 2049	3.600	%	300.0		300.0
2020 Series U due 2050	2.400	%	150.0		150.0
2021 Series V due 2031	2.200	%	350.0		350.0
Total First Mortgage Bonds			1,175.0		1,175.0
Less Amounts due Within One Year			(325.0)		—
Current Portion Classified as Long-Term Debt (1)			295.3		—
Unamortized Premiums and Discounts, Net			(2.5)		(2.6)
Unamortized Debt Issuance Costs			(7.9)		(8.6)
PSNH Long-Term Debt			$	1,134.9	$	1,163.8

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OTHER (Millions of Dollars)					As of December 31,
	Interest Rate				2022		2021
Yankee Gas - First Mortgage Bonds due 2024 - 2051	1.380	%	-	5.350%	$	845.0	$	765.0
NSTAR Gas - First Mortgage Bonds due 2025 - 2051	2.250	%	-	7.110%	705.0		580.0
EGMA - First Mortgage Bonds due 2031 - 2052	2.110	%	-	4.700%	650.0		550.0
Aquarion - Senior Notes due 2024	4.000%				360.0		360.0
Aquarion - Unsecured Notes due 2023 - 2052	—	%	-	6.430%	464.7		394.9
Aquarion - Secured Debt due 2023 - 2044	2.864	%	-	9.290%	34.4		39.6
Eversource Parent - Senior Notes due 2023 - 2050	0.800	%	-	4.600%	8,150.0		6,100.0
Pre-1983 Spent Nuclear Fuel Obligation (CYAPC)					11.9		11.7
Fair Value Adjustment (2)					26.2		43.8
Less Fair Value Adjustment - Current Portion (2)					(7.0)		(17.7)
Less Amounts due in One Year					(1,203.4)		(775.4)
Unamortized Premiums and Discounts, Net					40.1		43.4
Unamortized Debt Issuance Costs					(49.4)		(36.3)
Total Other Long-Term Debt					$	10,027.5	$	8,059.0
Total Eversource Long-Term Debt					$	19,724.0	$	17,023.6

(1)     As a result of the CL&P and PSNH long-term debt issuances in January 2023, $400 million and $295.3 million, respectively, of current portion of long-term debt were reclassified as Long-Term Debt on CL&P’s and PSNH’s balance sheets as of December 31, 2022.

(2)     The fair value adjustment amount is the purchase price adjustments, net of amortization, required to record long-term debt at fair value on the dates of the 2012 merger with NSTAR and the 2017 acquisition of Aquarion.

Availability under Long-Term Debt Issuance Authorizations: On December 14, 2022, the NHPUC approved PSNH’s request for authorization to issue up to $600 million in long-term debt through December 31, 2023. On November 30, 2022, the PURA approved CL&P's request for authorization to issue up to $1.15 billion in long-term debt through December 31, 2024. On June 14, 2022, the DPU approved NSTAR Gas’ request for authorization to issue up to $325 million in long-term debt through December 31, 2024. The remaining Eversource operating companies, including NSTAR Electric, have utilized the long-term debt authorizations in place with the respective regulatory commissions.

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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/ Repayment Information
CL&P 2023 Series A First Mortgage Bonds	5.25	%	$	500.0	January 2023	January 2053	Repaid 2013 Series A Bonds at maturity and short-term debt, and paid capital expenditures and working capital
CL&P 2013 Series A First Mortgage Bonds	2.50	%	(400.0)		January 2023	January 2023	Paid at maturity
NSTAR Electric 2022 Debentures	4.55	%	450.0		May 2022	June 2052	Repaid short-term debt, paid capital expenditures and working capital
NSTAR Electric 2022 Debentures	4.95	%	400.0		September 2022	September 2052	Refinanced investments in eligible green expenditures, which were previously financed using short-term debt from October 1, 2020 through June 30, 2022
NSTAR Electric 2012 Debentures	2.375	%	(400.0)		October 2022	October 2022	Paid at maturity
PSNH Series W First Mortgage Bonds	5.15	%	300.0		January 2023	January 2053	Repaid short-term debt, paid capital expenditures and working capital
Eversource Parent Series V Senior Notes	2.90	%	650.0		February 2022	March 2027	Repaid Series K Senior Notes at maturity and short-term debt
Eversource Parent Series W Senior Notes	3.375	%	650.0		February 2022	March 2032	Repaid Series K Senior Notes at maturity and short-term debt
Eversource Parent Series X Senior Notes	4.20	%	900.0		June 2022	June 2024	Repaid short-term debt and paid working capital
Eversource Parent Series Y Senior Notes	4.60	%	600.0		June 2022	July 2027	Repaid short-term debt and paid working capital
Eversource Parent Series K Senior Notes	2.75	%	(750.0)		March 2022	March 2022	Paid at maturity
Yankee Gas Series B First Mortgage Bonds	8.48	%	(20.0)		March 2022	March 2022	Paid at maturity
Yankee Gas Series U First Mortgage Bonds	4.31	%	100.0		September 2022	September 2032	Repaid short-term debt, paid capital expenditures and for general corporate purposes
EGMA Series C First Mortgage Bonds	4.70	%	100.0		June 2022	June 2052	Repaid short-term debt, paid capital expenditures and for general corporate purposes
NSTAR Gas Series V First Mortgage Bonds	4.40	%	125.0		July 2022	August 2032	Repaid short-term debt, paid capital expenditures and for general corporate purposes
Aquarion Water Company of New Hampshire General Mortgage Bonds	4.45	%	(5.0)		July 2022	July 2022	Paid at maturity
Aquarion Water Company of Connecticut Senior Notes	4.69	%	70.0		August 2022	September 2052	Repaid short-term debt

Long-Term Debt Provisions:  The utility plant of CL&P, PSNH, Yankee Gas, NSTAR Gas, EGMA and a portion of Aquarion is subject to the lien of each company's respective first mortgage bond indenture.  The Eversource parent, NSTAR Electric and a portion of Aquarion debt is unsecured. Additionally, the long-term debt agreements provide that Eversource and certain of its subsidiaries must comply with certain covenants as are customarily included in such agreements, including equity requirements for NSTAR Electric, NSTAR Gas and Aquarion.  Under the equity requirements, NSTAR Electric's and Aquarion's senior notes must maintain a certain consolidated indebtedness to capitalization ratio as of the end of any fiscal quarter and NSTAR Gas' outstanding long-term debt must not exceed equity.

Certain secured and unsecured long-term debt securities are callable at redemption price or are subject to make-whole provisions.

No long-term debt defaults have occurred as of December 31, 2022.

CYAPC's Pre-1983 Spent Nuclear Fuel Obligation:  Under the Nuclear Waste Policy Act of 1982, the DOE is responsible for the selection and development of repositories for, and the disposal of, spent nuclear fuel and high-level radioactive waste. CYAPC is obligated to pay the DOE for the costs to dispose of spent nuclear fuel and high-level radioactive waste generated prior to April 7, 1983 (pre-1983 Spent Nuclear Fuel). CYAPC has partially paid this obligation and recorded an accrual for its remaining liability to the DOE. This liability accrues interest costs at the 3-month Treasury bill yield rate. For nuclear fuel used to generate electricity prior to April 7, 1983, payment may be made any time prior to the first delivery of spent fuel to the DOE. As of December 31, 2022 and 2021, as a result of consolidating CYAPC, Eversource has consolidated $11.9 million and $11.7 million, respectively, in pre-1983 spent nuclear fuel obligations to the DOE. The obligation includes accumulated interest costs of $8.8 million and $8.7 million as of December 31, 2022 and 2021, respectively.  CYAPC maintains a trust to fund amounts due to the DOE for the disposal of pre-1983 spent nuclear fuel.  For further information, see Note 5, "Marketable Securities," to the financial statements. Fees for disposal of nuclear fuel burned on or after April 7, 1983 were billed to member companies and paid to the DOE.

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Long-Term Debt Maturities:  Long-term debt maturities on debt outstanding for the years 2023 through 2027 and thereafter are shown below. These amounts exclude PSNH rate reduction bonds, CYAPC pre-1983 spent nuclear fuel obligation, net unamortized premiums, discounts and debt issuance costs, and other fair value adjustments as of December 31, 2022:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2023	$	2,008.4	$	400.0	$	80.0	$	325.0
2024	1,950.0		139.8		—		—
2025	1,400.2		400.0		250.0		—
2026	940.2		—		300.0		—
2027	2,539.2		500.0		700.0		—
Thereafter	12,236.0		2,780.0		3,140.0		850.0
Total	$	21,074.0	$	4,219.8	$	4,470.0	$	1,175.0

10.    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.

The proceeds were used by PSNH Funding to purchase PSNH’s stranded cost asset-recovery property, including its vested property right to bill, collect and adjust a non-bypassable stranded cost recovery charge from PSNH’s retail customers. The collections are used to pay principal, interest and other costs in connection with the RRBs. The RRBs are secured by the stranded cost asset-recovery property. Cash collections from the stranded cost recovery charges and funds on deposit in trust accounts are the sole source of funds to satisfy the debt obligation. PSNH is not the owner of the RRBs, and PSNH Funding’s assets and revenues are not available to pay PSNH’s creditors. The RRBs are non-recourse senior secured obligations of PSNH Funding and are not insured or guaranteed by PSNH or Eversource Energy.

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)	As of December 31,
PSNH Balance Sheets:	2022		2021
Restricted Cash - Current Portion (included in Current Assets)	$	32.4	$	31.1
Restricted Cash - Long-Term Portion (included in Other Long-Term Assets)	3.2		3.2
Securitized Stranded Cost (included in Regulatory Assets)	435.7		478.9
Other Regulatory Liabilities (included in Regulatory Liabilities)	6.0		5.4
Accrued Interest (included in Other Current Liabilities)	6.9		7.5
Rate Reduction Bonds - Current Portion	43.2		43.2
Rate Reduction Bonds - Long-Term Portion	410.5		453.7

(Millions of Dollars) PSNH Income Statements:	For the Years Ended December 31,
	2022		2021		2020
Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net)	$	43.2	$	43.2	$	43.2
Interest Expense on RRB Principal (included in Interest Expense)	17.0		18.4		19.7

Estimated principal payments on RRBs as of December 31, 2022, is summarized annually through 2027 and thereafter as follows:

(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
PSNH	$	43.2	$	43.2	$	43.2	$	43.2	$	43.2	$	237.7	$	453.7

Variable Interest Entities - Other: The Company's variable interests outside of the consolidated group include contracts that are required by regulation and provide for regulatory recovery of contract costs and benefits through customer rates.  Eversource, CL&P and NSTAR Electric hold variable interests in VIEs through agreements with certain entities that own single renewable energy or peaking generation power plants, with other independent power producers and with transmission businesses.  Eversource, CL&P and NSTAR Electric do not control the activities that are economically significant to these VIEs or provide financial or other support to these VIEs.  Therefore, Eversource, CL&P and NSTAR Electric do not consolidate these VIEs.

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11.     EMPLOYEE BENEFITS

A.     Pension Benefits and Postretirement Benefits Other Than Pension

Eversource provides defined benefit retirement plans (Pension Plans) that cover eligible employees and are subject to the provisions of ERISA, as amended by the Pension Protection Act of 2006. Eversource's policy is to annually fund the Pension Plans in an amount at least equal to an amount that will satisfy all federal funding requirements. 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 benefits provided under the PBOP Plans are not vested, and the Company has the right to modify any benefit provision subject to applicable laws at that time. Eversource annually funds postretirement costs through tax deductible contributions to external trusts.

Funded Status:  The Pension, SERP and PBOP Plans are accounted for under the multiple-employer approach, with each operating company's balance sheet reflecting its share of the funded status of the plans.  Although Eversource maintains marketable securities in a benefit trust, the SERP Plans do not contain any assets.  For further information, see Note 5, "Marketable Securities," to the financial statements.  The following tables provide information on the plan benefit obligations, fair values of plan assets, and funded status:  

	Pension and SERP
	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Change in Benefit Obligation:
Benefit Obligation as of Beginning of Year	$	(6,729.7)	$	(1,330.9)	$	(1,448.4)	$	(721.0)	$	(7,045.3)	$	(1,477.3)	$	(1,517.9)	$	(748.7)
Service Cost	(70.1)		(18.7)		(13.8)		(6.9)		(85.8)		(23.0)		(15.8)		(8.9)
Interest Cost	(154.5)		(31.3)		(32.8)		(16.9)		(130.0)		(27.3)		(26.8)		(14.5)
Actuarial Gain	1,385.8		284.1		295.5		156.7		177.1		127.8		20.8		14.7
Benefits Paid - Pension	302.5		63.3		68.4		33.9		309.5		64.6		68.7		34.7
Benefits Paid - Lump Sum	33.0		—		14.8		1.0		34.7		—		15.6		—
Benefits Paid - SERP	12.9		0.3		0.2		0.4		10.1		0.3		0.2		0.4
Employee Transfers	—		3.2		5.7		(3.4)		—		4.0		6.8		1.3
Benefit Obligation as of End of Year	$	(5,220.1)	$	(1,030.0)	$	(1,110.4)	$	(556.2)	$	(6,729.7)	$	(1,330.9)	$	(1,448.4)	$	(721.0)
Change in Pension Plan Assets:
Fair Value of Pension Plan Assets as of   Beginning of Year	$	6,495.5	$	1,323.8	$	1,596.0	$	694.6	$	5,409.2	$	1,043.1	$	1,345.1	$	593.7
Employer Contributions	80.0		—		15.0		—		180.0		98.9		30.0		—
Actual Return on Pension Plan Assets	(433.6)		(85.3)		(103.3)		(45.1)		1,250.5		250.4		312.0		136.9
Benefits Paid - Pension	(302.5)		(63.3)		(68.4)		(33.9)		(309.5)		(64.6)		(68.7)		(34.7)
Benefits Paid - Lump Sum	(33.0)		—		(14.8)		(1.0)		(34.7)		—		(15.6)		—
Employee Transfers	—		(3.2)		(5.7)		3.4		—		(4.0)		(6.8)		(1.3)
Fair Value of Pension Plan Assets as of End of Year	$	5,806.4	$	1,172.0	$	1,418.8	$	618.0	$	6,495.5	$	1,323.8	$	1,596.0	$	694.6
Funded Status as of December 31st	$	586.3	$	142.0	$	308.4	$	61.8	$	(234.2)	$	(7.1)	$	147.6	$	(26.4)

Actuarial Gains and Losses: For the year ended December 31, 2022, actuarial gains were primarily attributable to an increase in the discount rate, which resulted in a decrease to Eversource's Pension and SERP Plans’ projected benefit obligation of $1.48 billion. For the year ended December 31, 2021, actuarial gains were primarily attributable to an increase in the discount rate, which resulted in a decrease to Eversource's Pension and SERP Plans’ projected benefit obligation of $286.8 million, which was partially offset by actuarial losses resulting from changes in the mortality assumption.

As of December 31, 2022 and 2021, the accumulated benefit obligation for the Pension and SERP Plans is as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2022	$	4,911.6	$	960.7	$	1,055.1	$	516.9
2021	6,337.3		1,241.1		1,376.1		670.3

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	PBOP
	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Change in Benefit Obligation:
Benefit Obligation as of Beginning of Year	$	(884.3)	$	(165.5)	$	(238.4)	$	(92.3)	$	(993.9)	$	(178.6)	$	(260.5)	$	(109.5)
Service Cost	(11.6)		(2.0)		(2.0)		(1.1)		(13.5)		(2.3)		(2.4)		(1.2)
Interest Cost	(20.2)		(3.7)		(5.3)		(2.2)		(17.4)		(3.2)		(4.4)		(1.8)
Actuarial Gain	173.6		33.0		39.4		15.2		81.4		5.8		11.5		14.6
Benefits Paid	52.1		10.4		16.6		6.0		51.7		10.9		16.3		5.6
Employee Transfers	—		(0.1)		0.2		(0.2)		—		1.9		1.1		—
Impact of Acquisitions	(3.3)		—		—		—		7.4		—		—		—
Benefit Obligation as of End of Year	$	(693.7)	$	(127.9)	$	(189.5)	$	(74.6)	$	(884.3)	$	(165.5)	$	(238.4)	$	(92.3)
Change in Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	$	1,138.3	$	145.7	$	530.0	$	88.0	$	1,004.1	$	134.1	$	464.6	$	79.4
Actual Return on Plan Assets	(119.6)		(15.0)		(57.0)		(9.8)		183.2		24.1		84.2		14.2
Employer Contributions	3.1		—		—		—		2.3		—		—		—
Benefits Paid	(51.7)		(10.4)		(16.6)		(6.0)		(51.3)		(10.9)		(16.3)		(5.6)
Employee Transfers	—		0.3		(0.3)		0.1		—		(1.6)		(2.5)		—
Fair Value of Plan Assets as of End of Year	$	970.1	$	120.6	$	456.1	$	72.3	$	1,138.3	$	145.7	$	530.0	$	88.0
Funded Status as of December 31st	$	276.4	$	(7.3)	$	266.6	$	(2.3)	$	254.0	$	(19.8)	$	291.6	$	(4.3)

Actuarial Gains and Losses: For the year ended December 31, 2022, actuarial gains were primarily attributable to an increase in the discount rate, which resulted in a decrease to the Eversource PBOP projected benefit obligation of $180.1 million. For the year ended December 31, 2021, actuarial gains were primarily attributable to an increase in the discount rate, which resulted in a decrease to the Eversource PBOP liability of $29.8 million, and by changes in our retirement assumptions.

A reconciliation of the prepaid assets and liabilities within the Eversource Pension, SERP and PBOP Plans’ funded status to the balance sheets is as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Prepaid Pension	$	756.7	$	147.9	$	310.2	$	66.4	$	—	$	0.4	$	149.8	$	—
Prepaid PBOP	288.8		—		266.6		—		272.0		—		291.6		—
Prepaid Pension and PBOP	$	1,045.5	$	147.9	$	576.8	$	66.4	$	272.0	$	0.4	$	441.4	$	—
Accrued Pension	$	3.7	$	—	$	—	$	—	$	58.1	$	—	$	—	$	20.6
Accrued SERP	166.7		5.9		1.8		4.6		176.1		7.5		2.2		5.8
Accrued PBOP	12.4		7.3		—		2.3		18.0		19.8		—		4.3
Less: Accrued SERP - current portion	(47.3)		(0.3)		(0.2)		(0.4)		(9.7)		(0.5)		(0.2)		(0.5)
Accrued Pension, SERP and PBOP	$	135.5	$	12.9	$	1.6	$	6.5	$	242.5	$	26.8	$	2.0	$	30.2

The following actuarial assumptions were used in calculating the Pension, SERP and PBOP Plans' year end funded status:

	Pension and SERP							PBOP
	As of December 31,							As of December 31,
		2022			2021			2022	2021
Discount Rate		5.1%	—	5.2%	2.8%	—	3.0%	5.2%	2.91%	—	2.92%
Compensation/Progression Rate		3.5%	—	4.0%	3.5%	—	4.0%	N/A

For the Eversource Service PBOP Plan, the health care cost trend rate is not applicable. For the Aquarion PBOP Plan, the health care cost trend rate for pre-65 retirees is 7 percent, with an ultimate rate of 5 percent in 2031, and for post-65 retirees, the health care trend rate and ultimate rate is 3.5 percent.

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Expense:  Eversource charges net periodic benefit plan expense/(income) for the Pension, SERP and PBOP Plans to its subsidiaries based on the actual participant demographic data for each subsidiary's participants.  The actual investment return in the trust is allocated to each of the subsidiaries annually in proportion to the investment return expected to be earned during the year. The Company utilizes the spot rate methodology to estimate the discount rate for the service and interest cost components of benefit expense, which provides a relatively precise measurement by matching projected cash flows to the corresponding spot rates on the yield curve.

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 Year Ended December 31, 2022								For the Year Ended December 31, 2022
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	70.1	$	18.7	$	13.8	$	6.9	$	11.6	$	2.0	$	2.0	$	1.1
Interest Cost	154.5		31.3		32.8		16.9		20.2		3.7		5.3		2.2
Expected Return on Plan Assets	(523.6)		(106.3)		(128.4)		(56.1)		(89.9)		(11.4)		(42.4)		(6.7)
Actuarial Loss	116.0		16.2		32.8		7.9		—		—		—		—
Prior Service Cost/(Credit)	1.4		—		0.3		—		(21.7)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Income	$	(181.6)	$	(40.1)	$	(48.7)	$	(24.4)	$	(79.8)	$	(4.6)	$	(52.1)	$	(3.0)
Intercompany Income Allocations	N/A		$	(16.0)	$	(12.4)	$	(3.6)	N/A		$	(3.7)	$	(3.6)	$	(1.2)

	Pension and SERP								PBOP
	For the Year Ended December 31, 2021								For the Year Ended December 31, 2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	85.8	$	23.0	$	15.8	$	8.9	$	13.5	$	2.3	$	2.4	$	1.2
Interest Cost	130.0		27.3		26.8		14.5		17.4		3.2		4.4		1.8
Expected Return on Plan Assets	(437.5)		(86.8)		(108.1)		(47.5)		(79.1)		(10.3)		(36.9)		(6.1)
Actuarial Loss	243.9		45.5		61.6		20.7		8.9		1.8		2.4		0.7
Prior Service Cost/(Credit)	1.4		—		0.3		—		(21.2)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Expense/(Income)	$	23.6	$	9.0	$	(3.6)	$	(3.4)	$	(60.5)	$	(1.9)	$	(44.7)	$	(2.0)
Intercompany Expense/(Income) Allocations	N/A		$	8.0	$	8.8	$	2.7	N/A		$	(1.6)	$	(1.9)	$	(0.6)

	Pension and SERP								PBOP
	For the Year Ended December 31, 2020								For the Year Ended December 31, 2020
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	76.2	$	21.8	$	15.4	$	8.2	$	10.2	$	1.7	$	2.1	$	0.9
Interest Cost	177.8		37.3		38.6		19.4		24.6		4.4		6.6		2.8
Expected Return on Plan Assets	(400.3)		(79.2)		(103.0)		(44.7)		(73.6)		(9.9)		(34.0)		(5.7)
Actuarial Loss	202.0		39.2		55.2		15.6		8.4		1.1		2.5		0.8
Prior Service Cost/(Credit)	1.2		—		0.3		—		(21.2)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Expense/(Income)	$	56.9	$	19.1	$	6.5	$	(1.5)	$	(51.6)	$	(1.6)	$	(39.8)	$	(0.8)
Intercompany Expense/(Income) Allocations	N/A		$	9.1	$	8.9	$	2.9	N/A		$	(1.1)	$	(1.4)	$	(0.5)

The following actuarial assumptions were used to calculate Pension, SERP and PBOP expense amounts:

	Pension and SERP									PBOP
	For the Years Ended December 31,									For the Years Ended December 31,
	2022			2021			2020			2022			2021			2020
Discount Rate	2.2%	—	3.2%	1.5%	—	3.0%	2.6%	—	3.5%	2.3%	—	3.3%	1.8%	—	3.1%	2.7%	—	3.6%
Expected Long-Term Rate of Return	8.25%			8.25%			8.25%			8.25%			8.25%			8.25%
Compensation/Progression Rate	3.5%	—	4.0%	3.5%	—	4.0%	3.5%	—	4.0%	N/A			N/A			N/A

For the Aquarion Pension and PBOP Plans, the expected long-term rate of return was 7 percent for the years ended December 31, 2022 and 2021. For the Aquarion PBOP Plan, the health care cost trend rate was a range of 3.5 percent to 6.5 percent for the year ended December 31, 2022 and 3.5 percent to 6.2 percent for the year ended December 31, 2021.

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Regulatory Assets and Accumulated Other Comprehensive Income/(Loss) Amounts: The Pension, SERP and PBOP Plans cover eligible employees, including, among others, employees of the regulated companies. The regulated companies record actuarial losses and gains and prior service costs and credits arising at the December 31st remeasurement date of the funded status of the benefit plans as a regulatory asset or regulatory liability in lieu of a charge to Accumulated Other Comprehensive Income/(Loss), reflecting ultimate recovery from customers through rates.  Regulatory accounting is also applied to the portions of the Eversource Service retiree benefit costs that support the regulated companies, as these costs are also recovered from customers.  Adjustments to the Pension, SERP and PBOP Plans' funded status for the unregulated companies are recorded on an after-tax basis to Accumulated Other Comprehensive Income/(Loss).  For further information, see Note 2, "Regulatory Accounting," and Note 16, "Accumulated Other Comprehensive Income/(Loss)," to the financial statements.  

The following is a summary of the changes in plan assets and benefit obligations recognized in Regulatory Assets and Other Comprehensive Income (OCI) as well as amounts in Regulatory Assets and OCI that were reclassified as net periodic benefit expense during the years presented:

	Pension and SERP								PBOP
	Regulatory Assets				OCI				Regulatory Assets				OCI
	For the Years Ended December 31,								For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2022		2021		2022		2021		2022		2021
Actuarial (Gains)/Losses Arising During the Year	$	(431.6)	$	(961.7)	$	4.6	$	(28.4)	$	36.8	$	(181.5)	$	(0.8)	$	(4.0)
Actuarial Losses Reclassified as Net Periodic Benefit Expense	(107.0)		(231.2)		(9.0)		(12.7)		—		(8.5)		—		(0.4)
Prior Service (Cost)/Credit Reclassified as Net Periodic   Benefit (Expense)/Income	(1.2)		(1.3)		(0.2)		(0.1)		21.8		21.1		(0.1)		0.1

The following is a summary of the remaining Regulatory Assets and Accumulated Other Comprehensive Income amounts that have not been recognized as components of net periodic benefit expense as of December 31, 2022 and 2021:

	Regulatory Assets as of December 31,				AOCI as of December 31,
(Millions of Dollars)	2022		2021		2022		2021
Pension and SERP
Actuarial Loss	$	888.7	$	1,427.3	$	61.9	$	66.3
Prior Service Cost	4.1		5.3		0.4		0.6
PBOP
Actuarial Loss	$	81.8	$	45.0	$	2.7	$	3.5
Prior Service (Credit)/Cost	(108.3)		(130.1)		0.9		1.0

The difference between the actual return and calculated expected return on plan assets for the Pension and PBOP Plans, as well as changes in actuarial assumptions impacting the projected benefit obligation, are recorded as unamortized actuarial gains or losses arising during the year in Regulatory Assets or Accumulated Other Comprehensive Income/(Loss). Unamortized actuarial gains or losses are amortized as a component of pension and PBOP expense over the estimated average future employee service period using the corridor approach.

Estimated Future Benefit Payments:  The following benefit payments, which reflect expected future service, are expected to be paid by the Pension, SERP and PBOP Plans:

(Millions of Dollars)	2023		2024		2025		2026		2027		2028 - 2032
Pension and SERP	$	401.4	$	374.4	$	380.1	$	383.0	$	384.1	$	1,901.7
PBOP	57.9		57.3		56.6		55.5		54.4		253.7

Eversource Contributions:   Based on the current status of the Pension Plans and federal pension funding requirements, there is no minimum funding requirement for our Eversource Service Pension Plan in 2023 and we do not expect to make pension contributions in 2023. We do not expect to make any contributions to the Eversource Service PBOP Plan in 2023. Eversource currently estimates contributing $5.0 million and $2.9 million to the Aquarion Pension and PBOP Plans, respectively, in 2023.

Fair Value of Pension and PBOP Plan Assets:  Pension and PBOP funds are held in external trusts.  Trust assets, including accumulated earnings, must be used exclusively for Pension and PBOP payments.  Eversource's investment strategy for its Pension and PBOP Plans is to maximize the long-term rates of return on these plans' assets within an acceptable level of risk.  The investment strategy for each asset category includes a diversification of asset types, fund strategies and fund managers and it establishes target asset allocations that are routinely reviewed and periodically rebalanced.  PBOP assets are comprised of assets held in the PBOP Plan trust, as well as specific assets within the Pension Plan trust (401(h) assets).  The investment policy and strategy of the 401(h) assets is consistent with that of the defined benefit pension plan. Eversource's expected long-term rates of return on Pension and PBOP Plan assets are based on target asset allocation assumptions and related expected long-term rates of return.  In developing its expected long-term rate of return assumptions for the Pension and PBOP Plans, Eversource evaluated input from consultants, as well as long-term inflation assumptions and historical returns. Management has assumed long-term rates of return of 8.25 percent for the Eversource Service Pension and PBOP Plan assets and a 7 percent long-term rate of return for the Aquarion Plans to estimate its 2023 Pension and PBOP costs.

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These long-term rates of return are based on the assumed rates of return for the target asset allocations as follows:

	As of December 31,
	2022				2021
	Eversource Pension Plan and PBOP Plan				Eversource Pension Plan and PBOP Plan
	Target Asset Allocation		Assumed Rate of Return		Target Asset Allocation		Assumed Rate of Return
Equity Securities:
United States	15.0	%	8.5	%	15.0	%	8.5	%
Global	10.0	%	8.75	%	10.0	%	8.75	%
Non-United States	8.0	%	8.5	%	8.0	%	8.5	%
Emerging Markets	4.0	%	10.0	%	4.0	%	10.0	%
Debt Securities:
Fixed Income	13.0	%	4.0	%	13.0	%	4.0	%
Public High Yield Fixed Income	4.0	%	6.5	%	4.0	%	6.5	%
Private Debt	13.0	%	9.0	%	13.0	%	9.0	%
Private Equity	18.0	%	12.0	%	18.0	%	12.0	%
Real Assets	15.0	%	7.5	%	15.0	%	7.5	%

The following table presents, by asset category, the Pension and PBOP Plan assets recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy:  

	Pension Plan
	Fair Value Measurements as of December 31,
(Millions of Dollars)	2022								2021
Asset Category:	Level 1		Level 2		Uncategorized		Total		Level 1		Level 2		Uncategorized		Total
Equity Securities	$	407.7	$	—	$	1,102.2	$	1,509.9	$	722.5	$	—	$	1,385.2	$	2,107.7
Fixed Income (1)	277.1		78.5		1,598.8		1,954.4		139.6		233.8		1,689.1		2,062.5
Private Equity	—		—		1,684.9		1,684.9		—		—		1,702.7		1,702.7
Real Assets	181.8		—		731.0		912.8		218.3		—		702.8		921.1
Total	$	866.6	$	78.5	$	5,116.9	$	6,062.0	$	1,080.4	$	233.8	$	5,479.8	$	6,794.0
Less:  401(h) PBOP Assets (2)							(255.6)								(298.5)
Total Pension Assets							$	5,806.4							$	6,495.5

	PBOP Plan
	Fair Value Measurements as of December 31,
(Millions of Dollars)	2022								2021
Asset Category:	Level 1		Level 2		Uncategorized		Total		Level 1		Level 2		Uncategorized		Total
Equity Securities	$	153.2	$	—	$	183.5	$	336.7	$	191.4	$	—	$	248.3	$	439.7
Fixed Income	18.2		40.2		141.1		199.5		49.7		45.2		125.5		220.4
Private Equity	—		—		70.9		70.9		—		—		58.7		58.7
Real Assets	71.2		—		36.2		107.4		90.0		—		31.0		121.0
Total	$	242.6	$	40.2	$	431.7	$	714.5	$	331.1	$	45.2	$	463.5	$	839.8
Add:  401(h) PBOP Assets (2)							255.6								298.5
Total PBOP Assets							$	970.1							$	1,138.3

(1)     Fixed Income investments classified as Level 1 as of December 31, 2022 include pending redemption settlements of $138 million.

(2)     The assets of the Pension Plan include a 401(h) account that has been allocated to provide health and welfare postretirement benefits under the PBOP Plan.

The Company values assets based on observable inputs when available.  Equity securities, exchange traded funds and futures contracts classified as Level 1 in the fair value hierarchy are priced based on the closing price on the primary exchange as of the balance sheet date.

Fixed income securities, such as government issued securities and corporate bonds, are included in Level 2 and are valued using pricing models, quoted prices of securities with similar characteristics or discounted cash flows.  The pricing models utilize observable inputs such as recent trades for the same or similar instruments, yield curves, discount margins and bond structures. Swaps are valued using pricing models that incorporate interest rates and equity and fixed income index closing prices to determine a net present value of the cash flows.  

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Certain investments, such as commingled funds, private equity investments, fixed income funds, real asset funds and hedge funds are valued using the net asset value (NAV) as a practical expedient. Assets valued at NAV are uncategorized in the fair value hierarchy. These investments are structured as investment companies offering shares or units to multiple investors for the purpose of providing a return. Commingled funds are recorded at NAV provided by the asset manager, which is based on the market prices of the underlying equity securities.  Private Equity investments, Fixed Income partnership funds and Real Assets are valued using the NAV provided by the partnerships, which are based on discounted cash flows of the underlying investments, real estate appraisals or public market comparables of the underlying investments, or the NAV of underlying assets held in hedge funds. Equity Securities investments in United States, Global, Non-United States and Emerging Markets that are uncategorized include investments in commingled funds and hedge funds that are overlaid with equity index swaps and futures contracts. Fixed Income investments that are uncategorized include investments in commingled funds, fixed income funds that invest in a variety of opportunistic credit and private debt strategies, and hedge funds that are overlaid with fixed income futures.  

B.     Defined Contribution Plans

Eversource maintains defined contribution plans on behalf of eligible participants.  The Eversource 401k Plan provides for employee and employer contributions up to statutory limits.  For eligible employees, the Eversource 401k Plan provides employer matching contributions of either 100 percent up to a maximum of three percent of eligible compensation or 50 percent up to a maximum of eight percent of eligible compensation. The Eversource 401k Plan also contains a K-Vantage feature for the benefit of eligible participants, which provides an additional annual employer contribution based on age and years of service.  K-Vantage participants are not eligible to actively participate in the Eversource Pension Plan.

The total Eversource 401k Plan employer matching contributions, including the K-Vantage contributions, were as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2022	$	59.9	$	7.7	$	12.8	$	4.8
2021	55.5		7.0		12.2		4.3
2020	49.4		6.6		11.8		4.1

C.    Share-Based Payments

Share-based compensation awards are recorded using a fair-value based method at the date of grant.  Eversource, CL&P, NSTAR Electric and PSNH record compensation expense related to these awards, as applicable, for shares issued to their respective employees and officers, as well as for the allocation of costs associated with shares issued to Eversource's service company employees and officers that support CL&P, NSTAR Electric and PSNH.  

Eversource Incentive Plans:  Eversource maintains long-term equity-based incentive plans in which Eversource, CL&P, NSTAR Electric and PSNH employees, officers and board members are eligible to participate.  The incentive plans authorize Eversource to grant up to 3,200,000 new shares for various types of awards, including RSUs and performance shares, to eligible employees, officers, and board members. As of December 31, 2022 and 2021, Eversource had 903,183 and 2,430,716 common shares, respectively, available for issuance under these plans.

Eversource accounts for its various share-based plans as follows:

•RSUs - Eversource records compensation expense, net of estimated forfeitures, on a straight-line basis over the requisite service period based upon the fair value of Eversource's common shares at the date of grant.  The par value of RSUs is reclassified to Common Stock from Capital Surplus, Paid In as RSUs become issued as common shares.

•Performance Shares - Eversource records compensation expense, net of estimated forfeitures, over the requisite service period. Performance shares vest based upon the extent to which Company goals are achieved.  Vesting of outstanding performance shares is based upon the Company's EPS growth over the requisite service period and level of payout is determined based on the total shareholder return as compared to the Edison Electric Institute (EEI) Index during the requisite service period.  The fair value of performance shares is determined at the date of grant using a lattice model. Compensation expense is subject to volatility until payout is established.

RSUs:  Eversource granted RSUs under the annual long-term incentive programs that are subject to three-year graded vesting schedules for employees, and one-year graded vesting schedules, or immediate vesting, for board members.  RSUs are paid in shares, reduced by amounts sufficient to satisfy withholdings for income taxes, subsequent to vesting.  A summary of RSU transactions is as follows:

	RSUs (Units)	Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2021	594,623	$	65.70
Granted	218,005	$	85.96
Shares Issued	(174,633)	$	79.89
Forfeited	(8,261)	$	85.87
Outstanding as of December 31, 2022	629,734	$	68.52

The weighted average grant-date fair value of RSUs granted for the years ended December 31, 2022, 2021 and 2020 was $85.96, $81.89 and $88.23, respectively.  As of December 31, 2022 and 2021, the number and weighted average grant-date fair value of unvested RSUs was 300,592 and $87.21 per share, and 297,270 and $83.39 per share, respectively.  During 2022, there were 184,540 RSUs at a weighted average grant-date fair value of $81.07 per share that vested during the year and were either paid or deferred.  As of December 31, 2022, 329,142 RSUs were fully vested and deferred and an additional 285,562 are expected to vest.  

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Performance Shares:  Eversource granted performance shares under the annual long-term incentive programs that vest based upon the extent to which Company goals are achieved at the end of three-year performance measurement periods.  Performance shares are paid in shares, after the performance measurement period.  A summary of performance share transactions is as follows:

	Performance Shares (Units)	Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2021	464,507	$	80.54
Granted	337,406	$	83.34
Shares Issued	(248,981)	$	68.96
Forfeited	(5,642)	$	85.28
Outstanding as of December 31, 2022	547,290	$	87.49

The weighted average grant-date fair value of performance shares granted for the years ended December 31, 2022, 2021 and 2020 was $83.34, $76.08 and $75.36, respectively.  As of December 31, 2022 and 2021, the number and weighted average grant-date fair value of unvested performance shares was 457,069 and $88.43 per share, and 436,957 and $81.41 per share, respectively.  During 2022, there were 311,553 performance shares at a weighted average grant-date fair value of $73.15 per share that vested during the year and were either paid or deferred.  As of December 31, 2022, 90,221 performance shares were fully vested and deferred.

Compensation Expense: The total compensation expense and associated future income tax benefits recognized by Eversource, CL&P, NSTAR Electric and PSNH for share-based compensation awards were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Compensation Expense	$	33.4	$	28.2	$	33.9
Future Income Tax Benefit	8.7		7.3		8.9

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Compensation Expense	$	10.0	$	10.7	$	3.6	$	8.8	$	9.0	$	3.0	$	10.9	$	11.3	$	3.6
Future Income Tax Benefit	2.6		2.8		0.9		2.3		2.3		0.8		2.9		3.0		1.0

As of December 31, 2022, there was $24.5 million of total unrecognized compensation expense related to nonvested share-based awards for Eversource, including $4.0 million for CL&P, $6.9 million for NSTAR Electric, and $1.4 million for PSNH.  This cost is expected to be recognized ratably over a weighted-average period of 1.77 years for Eversource and 1.78 years for CL&P, NSTAR Electric and PSNH.

An income tax rate of 26 percent was used to estimate the tax effect on total share-based payments determined under the fair-value based method for all awards. The Company issues treasury shares to settle fully vested RSUs and performance shares under the Company's incentive plans.

For the years ended December 31, 2022, 2021 and 2020, excess tax benefits associated with the distribution of stock compensation awards reduced income tax expense by $2.1 million, $4.0 million, and $6.6 million, respectively, which increased cash flows from operating activities on the statements of cash flows.

D.     Other Retirement Benefits

Eversource provides retirement and other benefits for certain current and past company officers.  These benefits are accounted for on an accrual basis and expensed over a period equal to the service lives of the employees.  The actuarially-determined liability for these benefits is included in Other Current and Long-Term Liabilities on the balance sheets. The related expense, which includes the allocation of expense associated with Eversource's service company officers that support CL&P, NSTAR Electric and PSNH, is included in Operations and Maintenance Expense on the income statements. The liability and expense amounts are as follows:

Eversource (Millions of Dollars)	As of and For the Years Ended December 31,
	2022		2021		2020
Actuarially-Determined Liability	$	43.4	$	42.8	$	45.7
Other Retirement Benefits Expense (1)	10.9		2.2		3.3

	As of and For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Actuarially-Determined Liability	$	0.2	$	0.1	$	1.3	$	0.2	$	0.1	$	1.5	$	0.2	$	0.1	$	1.7
Other Retirement Benefits Expense (1)	4.0		3.7		1.3		0.7		0.7		0.3		1.2		1.1		0.5

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(1)    Other Retirement Benefits Expense in 2022 includes a one-time special retirement benefit payable of $9.2 million.

12.     INCOME TAXES

The components of income tax expense are as follows:

Eversource (Millions of Dollars)	For the Years Ended December 31,
	2022		2021		2020
Current Income Taxes:
Federal	$	95.8	$	21.5	$	73.6
State	13.6		(21.6)		19.1
Total Current	109.4		(0.1)		92.7
Deferred Income Taxes, Net:
Federal	198.8		199.7		173.5
State	148.0		147.4		83.7
Total Deferred	346.8		347.1		257.2
Investment Tax Credits, Net	(2.6)		(2.8)		(3.7)
Income Tax Expense	$	453.6	$	344.2	$	346.2

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Current Income Taxes:
Federal	$	106.2	$	55.0	$	29.6	$	15.0	$	52.3	$	43.1	$	12.0	$	53.9	$	20.6
State	20.1		8.7		5.9		(7.0)		6.2		10.8		(6.1)		6.9		3.8
Total Current	126.3		63.7		35.5		8.0		58.5		53.9		5.9		60.8		24.4
Deferred Income Taxes, Net:
Federal	17.2		35.6		5.9		76.3		16.3		(14.9)		101.1		33.8		(1.3)
State	28.2		42.4		9.9		47.6		41.2		0.4		43.4		38.8		8.6
Total Deferred	45.4		78.0		15.8		123.9		57.5		(14.5)		144.5		72.6		7.3
Investment Tax Credits, Net	(0.5)		(1.7)		—		(0.6)		(1.7)		—		(0.7)		(2.6)		—
Income Tax Expense	$	171.2	$	140.0	$	51.3	$	131.3	$	114.3	$	39.4	$	149.7	$	130.8	$	31.7

A reconciliation between income tax expense and the expected tax expense at the statutory rate is as follows:

Eversource (Millions of Dollars, except percentages)	For the Years Ended December 31,
	2022			2021			2020
Income Before Income Tax Expense	$	1,866.0		$	1,572.3		$	1,558.9
Statutory Federal Income Tax Expense at 21%	391.9			330.2			327.4
Tax Effect of Differences:
Depreciation	(17.1)			(18.1)			(11.1)
Investment Tax Credit Amortization	(2.6)			(2.8)			(3.7)
State Income Taxes, Net of Federal Impact	75.9			54.4			44.9
Dividends on ESOP	(5.1)			(5.1)			(5.1)
Tax Asset Valuation Allowance/Reserve Adjustments	51.6			44.6			33.4
Excess Stock Benefit	(2.1)			(4.0)			(6.6)
EDIT Amortization	(49.1)			(69.1)			(48.7)
Other, Net	10.2			14.1			15.7
Income Tax Expense	$	453.6		$	344.2		$	346.2
Effective Tax Rate	24.3		%	21.9		%	22.2		%

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	For the Years Ended December 31,
	2022									2021									2020
(Millions of Dollars, except percentages)	CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH
Income Before Income Tax Expense	$	704.1		$	632.4		$	222.9		$	533.0		$	590.9		$	189.8		$	607.6		$	575.8		$	179.0
Statutory Federal Income Tax Expense at 21%	147.9			132.8			46.8			111.9			124.1			39.9			127.6			120.9			37.6
Tax Effect of Differences:
Depreciation	(3.7)			(4.2)			0.9			(6.4)			(3.4)			(0.2)			0.4			(3.7)			(1.4)
Investment Tax Credit Amortization	(0.5)			(1.7)			—			(0.6)			(1.7)			—			(0.7)			(2.6)			—
State Income Taxes, Net of Federal Impact	(6.6)			40.3			12.5			(4.6)			37.5			8.9			(1.2)			36.0			9.8
Tax Asset Valuation   Allowance/Reserve Adjustments	44.7			—			—			36.7			—			—			30.7			—			—
Excess Stock Benefit	(0.7)			(0.8)			(0.3)			(1.5)			(1.4)			(0.5)			(2.3)			(2.3)			(0.8)
EDIT Amortization	(9.2)			(29.2)			(7.7)			(9.8)			(43.2)			(10.5)			(9.0)			(20.4)			(15.4)
Other, Net	(0.7)			2.8			(0.9)			5.6			2.4			1.8			4.2			2.9			1.9
Income Tax Expense	$	171.2		$	140.0		$	51.3		$	131.3		$	114.3		$	39.4		$	149.7		$	130.8		$	31.7
Effective Tax Rate	24.3		%	22.1		%	23.0		%	24.6		%	19.3		%	20.8		%	24.6		%	22.7		%	17.7		%

Eversource, CL&P, NSTAR Electric and PSNH file a consolidated federal income tax return and unitary, combined and separate state income tax returns.  These entities are also parties to a tax allocation agreement under which taxable subsidiaries do not pay any more taxes than they would have otherwise paid had they filed a separate company tax return, and subsidiaries generating tax losses, if any, are paid for their losses when utilized.

Deferred tax assets and liabilities are recognized for the future tax effects of temporary differences between the carrying amounts and the tax basis of assets and liabilities.  The tax effect of temporary differences is accounted for in accordance with the rate-making treatment of the applicable regulatory commissions and relevant accounting authoritative literature.  The tax effects of temporary differences that give rise to the net accumulated deferred income tax obligations are as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Deferred Tax Assets:
Employee Benefits	$	228.9	$	25.3	$	57.4	$	11.6	$	270.8	$	23.9	$	40.3	$	14.1
Derivative Liabilities	53.8		53.8		—		—		76.8		76.8		—		—
Regulatory Deferrals - Liabilities	529.5		146.6		285.7		42.1		390.7		90.9		215.4		24.3
Allowance for Uncollectible Accounts	125.5		60.5		20.7		7.9		104.1		48.8		21.5		6.2
Tax Effect - Tax Regulatory Liabilities	762.9		324.6		241.8		97.8		783.4		328.2		254.3		100.9
Net Operating Loss Carryforwards	16.7		—		—		—		7.5		—		—		—
Purchase Accounting Adjustment	62.0		—		—		—		67.2		—		—		—
Other	176.6		109.5		20.5		21.3		196.6		103.9		21.7		22.9
Total Deferred Tax Assets	1,955.9		720.3		626.1		180.7		1,897.1		672.5		553.2		168.4
Less:  Valuation Allowance	82.8		63.3		—		—		61.5		44.5		—		—
Net Deferred Tax Assets	$	1,873.1	$	657.0	$	626.1	$	180.7	$	1,835.6	$	628.0	$	553.2	$	168.4
Deferred Tax Liabilities:
Accelerated Depreciation and Other   Plant-Related Differences	$	4,793.7	$	1,602.0	$	1,643.7	$	523.8	$	4,426.0	$	1,509.5	$	1,553.7	$	482.9
Property Tax Accruals	95.3		40.7		41.3		6.7		88.1		40.5		33.7		6.3
Regulatory Amounts:
Regulatory Deferrals - Assets	1,251.9		406.4		407.9		165.2		1,260.3		438.3		337.6		198.4
Tax Effect - Tax Regulatory Assets	271.7		185.6		10.7		7.9		257.8		181.4		10.9		8.3
Goodwill-related Regulatory Asset - 1999 Merger	76.8		—		65.9		—		81.4		—		69.9		—
Employee Benefits	305.5		45.0		140.8		18.7		174.7		3.5		107.1		0.7
Derivative Assets	10.5		10.5		—		—		14.9		14.9		—		—
Other	135.6		6.8		16.7		21.2		129.5		2.0		19.8		9.8
Total Deferred Tax Liabilities	$	6,941.0	$	2,297.0	$	2,327.0	$	743.5	$	6,432.7	$	2,190.1	$	2,132.7	$	706.4

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2022 Federal Legislation: On August 16, 2022, the Inflation Reduction Act of 2022 (IRA) was signed into law. This is a broad package of legislation that includes incentives and support for clean energy resource development. Most notable for Eversource, the investment tax credit (ITC) on offshore wind projects increases from 30 percent to 40 percent if certain requirements for labor and domestic content are met. The act also re-establishes the production tax credit for solar and wind energy projects, gives increased credit for projects in certain communities, and sets credits for qualifying clean energy generation and energy storage projects. The tax provisions of the IRA provide additional incentives for offshore wind projects and could reduce retail electricity costs for our customers related to those clean energy investments. The IRA includes other tax provisions focused on implementing a 15 percent minimum tax on adjusted financial statement income and a one percent excise tax on corporate share repurchases. The Department of Treasury and the Internal Revenue Service issued limited guidance in the fourth quarter; however, they are expected to issue additional needed guidance with respect to the application of the newly enacted IRA provisions in the future. We will continue to monitor and evaluate impacts on our consolidated financial statements. We currently do not expect the alternative minimum tax change to have a material impact on our earnings, financial condition or cash flows.

2021 Federal Legislation: On November 5, 2021, Congress passed the Infrastructure Investment and Jobs Act. The Act provided spending of more than $500 billion on roads, highways, bridges, public transit, and utilities. For water and sewer utilities, the Act restored the exclusion from a corporation’s income for contributions in aid of construction where the corporation is a water or sewer utility eliminated by the Tax Cuts and Jobs Act of 2017. Under the Act, a regulated public utility that provides water or sewage disposal services can treat money or property received from any person as a tax-free contribution to capital if it meets certain criteria for contributions made after 2020. The Act did not have a material impact on Eversource in 2021.

Carryforwards:  The following table provides the amounts and expiration dates of state tax credit and loss carryforwards and federal tax credit and net operating loss carryforwards:

	As of December 31,
	2022									2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Expiration Range	Eversource		CL&P		NSTAR Electric		PSNH		Expiration Range
State Net Operating Loss	$	288.1	$	—	$	—	$	—	2022 - 2041	$	138.3	$	—	$	—	$	—	2021 - 2040
State Tax Credit	204.5		137.7		—		—		2022 - 2027	197.7		137.0		—		—		2021 - 2026
State Charitable Contribution	20.1		—		—		—		2022 - 2026	23.7		—		—		—		2021 - 2025

In 2022, the Company increased its valuation allowance reserve for state credits by $21.3 million ($18.8 million for CL&P), net of tax, to reflect an update for expiring tax credits. In 2021, the Company increased its valuation allowance reserve for state credits by $13.0 million ($10.8 million for CL&P), net of tax, to reflect an update for expiring tax credits.

For 2022 and 2021, state credit and state loss carryforwards have been partially reserved by a valuation allowance of $82.8 million and $61.5 million (net of tax), respectively.      

Unrecognized Tax Benefits:  A reconciliation of the activity in unrecognized tax benefits, all of which would impact the effective tax rate if recognized, is as follows:

(Millions of Dollars)	Eversource		CL&P
Balance as of January 1, 2020	$	55.0	$	23.1
Gross Increases - Current Year	11.9		4.6
Gross Increases - Prior Year	1.4		0.7
Lapse of Statute of Limitations	(6.5)		(2.6)
Balance as of December 31, 2020	61.8		25.8
Gross Increases - Current Year	11.3		3.8
Gross Decreases - Prior Year	(0.3)		(0.6)
Lapse of Statute of Limitations	(7.0)		(2.8)
Balance as of December 31, 2021	65.8		26.2
Gross Increases - Current Year	11.5		3.5
Gross Decreases - Prior Year	(2.4)		(0.9)
Lapse of Statute of Limitations	(7.8)		(3.3)
Balance as of December 31, 2022	$	67.1	$	25.5

Interest and Penalties:  Interest on uncertain tax positions is recorded and generally classified as a component of Other Interest Expense on the statements of income.  However, when resolution of uncertainties results in the Company receiving interest income, any related interest benefit is recorded in Other Income, Net on the statements of income.  No penalties have been recorded. There has been no interest expense or income recognized on uncertain tax positions for the years ended December 31, 2022, 2021 or 2020. The accrued interest payable was $0.1 million as of both December 31, 2022 and 2021.

Tax Positions:  During 2022 and 2021, Eversource did not resolve any of its uncertain tax positions.

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Open Tax Years:  The following table summarizes Eversource, CL&P, NSTAR Electric, and PSNH's tax years that remain subject to examination by major tax jurisdictions as of December 31, 2022:

Description	Tax Years
Federal	2022
Connecticut	2019 - 2022
Massachusetts	2019 - 2022
New Hampshire	2019 - 2022

Eversource does not estimate to have an earnings impact related to unrecognized tax benefits during the next twelve months.

13.     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.

Environmental reserves are accrued when assessments indicate it is probable that a liability has been incurred and an amount can be reasonably estimated.  The approach used estimates the liability based on the most likely action plan from a variety of available remediation options, including no action required or several different remedies ranging from establishing institutional controls to full site remediation and monitoring.  These liabilities are estimated on an undiscounted basis and do not assume that the amounts are recoverable from insurance companies or other third parties.  The environmental reserves include sites at different stages of discovery and remediation and do not include any unasserted claims.

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.  

The amounts recorded as environmental reserves are included in Other Current Liabilities and Other Long-Term Liabilities on the balance sheets and represent management's best estimate of the liability for environmental costs, and take into consideration site assessment, remediation and long-term monitoring costs.  The environmental reserves also take into account recurring costs of managing hazardous substances and pollutants, mandated expenditures to remediate contaminated sites and any other infrequent and non-recurring clean-up costs.  A reconciliation of the activity in the environmental reserves is as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
Balance as of January 1, 2021	$	102.4	$	12.3	$	4.7	$	7.1
Additions	23.4		4.4		—		—
Payments/Reductions	(10.4)		(2.8)		(1.4)		(0.8)
Balance as of December 31, 2021	115.4		13.9		3.3		6.3
Additions	12.6		0.9		0.4		0.5
Payments/Reductions	(5.4)		(0.9)		(0.3)		(0.7)
Balance as of December 31, 2022	$	122.6	$	13.9	$	3.4	$	6.1

The number of environmental sites for which remediation or long-term monitoring, preliminary site work or site assessment is being performed are as follows:

	Eversource	CL&P	NSTAR Electric	PSNH
2022	59	13	10	8
2021	61	14	11	9

The increase in the reserve balance was due primarily to changes in cost estimates at certain MGP sites at our natural gas business segment, which we now know will require additional remediation.

Included in the number of sites and reserve amounts above are former MGP sites that were operated several decades ago and manufactured natural gas from coal and other processes, which resulted in certain by-products remaining in the environment that may pose a potential risk to human health and the environment, for which Eversource may have potential liability.  The reserve balances related to these former MGP sites were $112.6 million and $105.6 million as of December 31, 2022 and 2021, respectively, and related primarily to the natural gas business segment.

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As of December 31, 2022, for 15 environmental sites (7 for CL&P and 1 for NSTAR Electric) that are included in the Company's reserve for environmental costs, management cannot reasonably estimate the exposure to loss in excess of the reserve, or range of loss, as these sites are under investigation and/or there is significant uncertainty as to what remedial actions, if any, the Company may be required to undertake.  As of December 31, 2022, $25.8 million (including $4.4 million for CL&P and $0.1 million for NSTAR Electric) had been accrued as a liability for these sites.

As of December 31, 2022, for 7 environmental sites (1 for CL&P) that are included in the Company's reserve for environmental costs, the information known and the nature of the remediation options allow for the Company to estimate the range of losses for environmental costs.  As of December 31, 2022, $29.9 million (including $0.6 million for CL&P) has been accrued as a liability for these sites, which represents the low end of the range of the liabilities for environmental costs.  Management believes that additional losses of up to approximately $17 million ($0.3 million at CL&P) may be incurred in executing current remediation plans for these sites.

As of December 31, 2022, for the remaining 37 environmental sites (including 5 for CL&P, 9 for NSTAR Electric and 8 for PSNH) that are included in the Company's reserve for environmental costs, the $66.9 million accrual (including $8.9 million for CL&P, $3.3 million for NSTAR Electric and $6.1 million for PSNH) represents management's best estimate of the probable liability and no additional loss is estimable at this time.

PSNH, NSTAR Gas, EGMA and Yankee Gas have rate recovery mechanisms for MGP related environmental costs, therefore, changes in their respective environmental reserves do not impact Net Income. CL&P is allowed to defer certain environmental costs for future recovery.  NSTAR Electric does not have a separate environmental cost recovery regulatory mechanism.

B.     Long-Term Contractual Arrangements

Estimated Future Annual Costs:  The estimated future annual costs of significant executed, non-cancelable, long-term contractual arrangements in effect as of December 31, 2022 are as follows:

Eversource
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	751.8	$	952.6	$	954.8	$	983.0	$	998.5	$	8,141.1	$	12,781.8
Natural Gas Procurement	447.1		419.4		340.9		298.5		269.4		1,450.6		3,225.9
Purchased Power and Capacity	87.6		86.8		75.2		2.9		2.7		7.2		262.4
Peaker CfDs	20.3		21.1		17.9		16.0		11.4		64.4		151.1
Transmission Support Commitments	17.8		20.7		22.6		22.6		22.6		22.6		128.9
Total	$	1,324.6	$	1,500.6	$	1,411.4	$	1,323.0	$	1,304.6	$	9,685.9	$	16,550.1

CL&P
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	594.8	$	609.1	$	610.2	$	607.6	$	609.0	$	2,253.1	$	5,283.8
Purchased Power and Capacity	83.5		83.9		72.4		0.1		—		—		239.9
Peaker CfDs	20.3		21.1		17.9		16.0		11.4		64.4		151.1
Transmission Support Commitments	7.0		8.2		8.9		8.9		8.9		8.9		50.8
Total	$	705.6	$	722.3	$	709.4	$	632.6	$	629.3	$	2,326.4	$	5,725.6

NSTAR Electric
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	79.2	$	270.0	$	316.5	$	322.9	$	328.6	$	5,519.8	$	6,837.0
Purchased Power and Capacity	2.9		2.9		2.8		2.8		2.7		7.2		21.3
Transmission Support Commitments	7.0		8.1		8.9		8.9		8.9		8.9		50.7
Total	$	89.1	$	281.0	$	328.2	$	334.6	$	340.2	$	5,535.9	$	6,909.0

PSNH
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	77.8	$	73.5	$	28.1	$	52.5	$	60.9	$	368.2	$	661.0
Purchased Power and Capacity	1.2		—		—		—		—		—		1.2
Transmission Support Commitments	3.8		4.4		4.8		4.8		4.8		4.8		27.4
Total	$	82.8	$	77.9	$	32.9	$	57.3	$	65.7	$	373.0	$	689.6

Renewable Energy Purchase Contracts:  Renewable energy purchase contracts include non-cancellable commitments under contracts of CL&P, NSTAR Electric and PSNH for the purchase of energy and capacity from renewable energy facilities.  Such contracts extend through 2043 for CL&P, 2044 for NSTAR Electric and 2033 for PSNH.

Renewable Energy and Purchase Contracts includes long-term commitments of NSTAR Electric pertaining to the Vineyard Wind LLC contract awarded under the Massachusetts Clean Energy 83C procurement solicitation. NSTAR Electric, along with other Massachusetts distribution companies, entered into 20-year contracts to purchase electricity generated by this 800 megawatt offshore wind project. Construction on the Vineyard Wind project commenced in 2022. Estimated energy costs under this contract are expected to begin when the facilities are in service in 2024 and range between $240 million and $375 million per year under NSTAR Electric’s 20-year contract, totaling approximately $6.0 billion.

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As required by 2018 regulation, CL&P and UI each entered into PURA-approved ten-year contracts in 2019 to purchase a combined total of approximately 9 million MWh annually from the Millstone Nuclear Power Station generation facility, which represents a combined amount of approximately 50 percent of the facility's output (approximately 40 percent by CL&P). The Millstone Nuclear Power Station has a 2,112 MW nameplate capacity. Energy deliveries and payments under these contracts began in 2019. Also as required by 2018 regulation, CL&P and UI each entered into PURA-approved eight-year contracts in 2019 to purchase a combined amount of approximately 18 percent of the Seabrook Nuclear Power Plant’s output (approximately 15 percent by CL&P) beginning January 1, 2022. The Seabrook Nuclear Power Plant has an approximate 1,250 MW nameplate capacity. The total estimated remaining future cost of the Millstone Nuclear Power Station and Seabrook Nuclear Power Plant energy purchase contracts are $2.9 billion and are reflected in the table above. CL&P sells the energy purchased under these contracts into the market and uses the proceeds from these energy sales to offset the contract costs.  As the net costs under these contracts are recovered from customers in future rates, the contracts do not have an impact on the net income of CL&P. These contracts do not meet the definition of a derivative, and accordingly, the costs of these contracts are being accounted for as incurred.

Excluded from the table above are long-term commitments of NSTAR Electric pertaining to the Massachusetts Clean Energy 83D contract, for which construction was suspended prior to December 31, 2021. Should the project attain feasibility and construction recommence, the estimated costs under the contract may potentially begin in 2023 and range between $150 million and $415 million per year under a 20-year contract, totaling approximately $6.7 billion.

The contractual obligations table above does not include long-term commitments signed by CL&P and NSTAR Electric, as required by the PURA and DPU, respectively, for the purchase of renewable energy and related products that are contingent on the future construction of energy facilities.

Natural Gas Procurement:  Eversource's natural gas distribution businesses have long-term contracts for the purchase, transportation and storage of natural gas as part of its portfolio of supplies, which extend through 2045.

Purchased Power and Capacity:  These contracts include capacity CfDs of CL&P through 2026, and various IPP contracts or purchase obligations for electricity which extend through 2024 for CL&P, 2031 for NSTAR Electric and 2023 for PSNH.

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 December 31, 2022 and 2021 were 674 MW and 675 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.  CL&P's portion of the costs and benefits of these contracts will be paid by, or refunded to, CL&P's customers.

The contractual obligations table above does not include CL&P's, NSTAR Electric's or PSNH's standard/basic service contracts for the purchase of energy supply, the amounts of which vary with customers' energy needs.

Peaker CfDs:  CL&P, along with UI, has three peaker CfDs for a total of approximately 500 MW of peaking capacity through 2042.  CL&P has a sharing agreement with UI, whereby CL&P is responsible for 80 percent and UI for 20 percent of the net costs or benefits of these CfDs.  The Peaker CfDs pay the generation facility owner the difference between capacity, forward reserve and energy market revenues and a cost-of-service payment stream for 30 years.  The ultimate cost or benefit to CL&P under these contracts will depend on the costs of plant operation and the prices that the projects receive for capacity and other products in the ISO-NE markets.  CL&P's portion of the amounts paid or received under the Peaker CfDs are recovered from, or refunded to, CL&P's customers.

Transmission Support Commitments:  Along with other New England utilities, CL&P, NSTAR Electric and PSNH entered into a series of agreements in the 1980’s to support the costs of, and receive rights to use, transmission and terminal facilities that were built to import electricity from the Hydro-Québec system in Canada. CL&P, NSTAR Electric and PSNH were obligated to pay, over a 30-year period that ended in 2020, their proportionate shares of the annual operation and maintenance expenses and capital costs of those facilities. On December 18, 2020, the parties to these agreements submitted to FERC an offer of settlement and amendments to these agreements implementing the terms of an extension for an additional 20-year period ending in 2040. On May 20, 2021, FERC approved this settlement, effective January 1, 2021.

The total costs incurred under these agreements were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Renewable Energy Purchase Contracts	$	678.1	$	609.2	$	584.2
Natural Gas Procurement	1,042.8		712.7		453.4
Purchased Power and Capacity	61.6		56.4		62.7
Peaker CfDs	13.4		24.3		22.7
Transmission Support Commitments	12.7		15.4		22.1

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	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Renewable Energy Purchase Contracts	$	513.2	$	90.8	$	74.1	$	457.1	$	84.7	$	67.4	$	426.3	$	88.8	$	69.1
Purchased Power and Capacity	57.7		3.0		0.9		53.1		3.0		0.3		59.3		3.1		0.3
Peaker CfDs	13.4		—		—		24.3		—		—		22.7		—		—
Transmission Support Commitments	5.0		5.0		2.7		6.1		6.0		3.3		8.7		8.7		4.7

C.     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. The DOE Phase V trial is expected to begin in the third quarter of 2023.

D.    Guarantees and Indemnifications

In the normal course of business, Eversource parent provides credit assurances on behalf of its subsidiaries, including CL&P, NSTAR Electric and PSNH, in the form of guarantees. Management does not anticipate a material impact to net income or cash flows as a result of these various guarantees and indemnifications. 

Guarantees issued on behalf of unconsolidated entities, including equity method offshore wind investments, for which Eversource parent is the guarantor, are recorded at fair value as a liability on the balance sheet at the inception of the guarantee. Eversource regularly reviews performance risk under these guarantee arrangements, and in the event it becomes probable that Eversource parent will be required to perform under the guarantee, the amount of probable payment will be recorded. The fair value of guarantees issued on behalf of unconsolidated entities are recorded within Other Long-Term Liabilities on the balance sheet, and were $4.2 million and $7.3 million as of December 31, 2022 and 2021, respectively.

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The following table summarizes Eversource parent's exposure to guarantees and indemnifications of its subsidiaries and affiliates to external parties, and primarily relates to its offshore wind business:  

As of December 31, 2022
Company (Obligor)	Description	Maximum Exposure (in millions)		Expiration Dates
North East Offshore LLC	Construction-related purchase agreements with third-party contractors (1)	$	717.6	(1)
Sunrise Wind LLC	Construction-related purchase agreements with third-party contractors (2)	311.5		2025 - 2026
Revolution Wind, LLC	Construction-related purchase agreements with third-party contractors (3)	419.1		2024 - 2027
South Fork Wind, LLC	Construction-related purchase agreements with third-party contractors (4)	142.1		2023 - 2026
Eversource Investment LLC	Funding and indemnification obligations of North East Offshore LLC (5)	77.0		(5)
South Fork Wind, LLC	Power Purchase Agreement Security (6)	7.1		(6)
Sunrise Wind LLC	OREC capacity production (7)	2.2		(7)
Bay State Wind LLC	Real estate purchase	2.5		2023
South Fork Wind, LLC	Transmission interconnection	1.2		—
Eversource Investment LLC	Letters of Credit (8)	4.3		—
Various	Surety bonds (9)	35.7		2023
Eversource Service	Lease payments for real estate	0.5		2024

(1)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, North East Offshore LLC (NEO), under which Eversource parent agreed to guarantee 50 percent of NEO’s performance of obligations under certain purchase agreements with third-party contractors, in an aggregate amount not to exceed $1.3 billion with an expiration date in 2025. Eversource parent also issued a separate guarantee to Ørsted on behalf of NEO, under which Eversource parent agreed to guarantee 50 percent of NEO’s payment obligations under certain offshore wind project construction-related agreements with Ørsted in an aggregate amount not to exceed $62.5 million and expiring upon full performance of the guaranteed obligation. Any amounts paid under this guarantee to Ørsted will count toward, but not increase, the maximum amount of the Funding Guarantee described in Note 5, below.

(2)     Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an aggregate amount not to exceed $465.8 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from March 2025 and April 2026 and (ii) full performance of the guaranteed obligations.     

(3)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Revolution Wind, LLC, whereby Eversource parent will guarantee Revolution Wind, LLC's performance of certain obligations, in an aggregate amount not to exceed $546.7 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from May 2024 and November 2027 and (ii) full performance of the guaranteed obligations.

(4)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations in connection with construction-related purchase agreements. Under these guarantees, Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in a total aggregate amount not to exceed $207.7 million. Eversource parent’s obligations under these guarantees expire upon the earlier of (i) dates ranging from June 2023 and August 2026 and (ii) full performance of the guaranteed obligations.

(5)    Eversource parent issued a guarantee (Funding Guarantee) on behalf of Eversource Investment LLC (EI), its wholly-owned subsidiary that holds a 50 percent ownership interest in NEO, under which Eversource parent agreed to guarantee certain funding obligations and certain indemnification payments of EI under the operating agreement of NEO, in an amount not to exceed $910 million. The guaranteed obligations include payment of EI's funding obligations during the construction phase of NEO’s underlying offshore wind projects and indemnification obligations associated with third party credit support for its investment in NEO. Eversource parent’s obligations under the Funding Guarantee expire upon the full performance of the guaranteed obligations.

(6)    Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in an amount not to exceed $7.1 million, under a Power Purchase Agreement between the Long Island Power Authority and South Fork Wind, LLC (the Agreement). The guarantee expires upon the later of (i) the end of the Agreement term and (ii) full performance of the guarantee obligations.

(7)    Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an amount not to exceed $15.4 million, under the Offshore Wind Renewable Energy Certificate Purchase and Sale Agreement (the Agreement). The Agreement was executed by and between the New York State Energy Research and Development Authority (NYSERDA) and Sunrise Wind LLC. The guarantee expires upon the full performance of the guaranteed obligations.     Effective January 1, 2023, exposure under the guarantee increased from $2.2 million to $11.0 million.

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(8)    On September 16, 2020, Eversource parent entered into a guarantee on behalf of EI, which holds Eversource's investments in offshore wind-related equity method investments, under which Eversource parent would guarantee EI's obligations under a letter of credit facility with a financial institution that EI may request in an aggregate amount of up to approximately $25 million. In January 2022, Eversource parent issued two letters of credit on behalf of South Fork Wind, LLC related to future decommissioning obligations of certain onshore transmission assets totaling $4.3 million.

(9)    Surety bond expiration dates reflect termination dates, the majority of which will be renewed or extended.  Certain surety bonds contain credit ratings triggers that would require Eversource parent to post collateral in the event that the unsecured debt credit ratings of Eversource parent are downgraded.

2023 Guaranty: In the first quarter of 2023, Eversource parent issued an additional guaranty on behalf of Sunrise Wind LLC totaling $58.1 million, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain contractual obligations.

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 December 31, 2022 and 2021. This reserve represents the difference between the billed rates during the second complaint period and a 10.57 percent base ROE and 11.74 percent incentive cap. The reserve consisted of $21.4 million for CL&P, $14.6 million for NSTAR Electric and $3.1 million for PSNH as of both December 31, 2022 and 2021.

On October 16, 2018, FERC issued an order on all four complaints describing how it intends to address the issues that were remanded by the Court. FERC proposed a new framework to determine (1) whether an existing ROE is unjust and unreasonable and, if so, (2) how to calculate a replacement ROE. Initial briefs were filed by the NETOs, Complainants and FERC Trial Staff on January 11, 2019 and reply briefs were filed on March 8, 2019. The NETOs' brief was supportive of the overall ROE methodology determined in the October 16, 2018 order provided the FERC does not change the proposed methodology or alter its implementation in a manner that has a material impact on the results.

The FERC order included illustrative calculations for the first complaint using FERC's proposed frameworks with financial data from that complaint. Those illustrative calculations indicated that for the first complaint period, for the NETOs, which FERC concludes are of average financial risk, the preliminary just and reasonable base ROE is 10.41 percent and the preliminary incentive cap on total ROE is 13.08 percent. If the results of the illustrative calculations were included in a final FERC order for each of the complaint periods, then a 10.41 percent base ROE and a 13.08 percent incentive cap would not have a significant impact on our financial statements for all of the complaint periods. These preliminary calculations are not binding and do not represent what we believe to be the most likely outcome of a final FERC order.

On November 21, 2019, FERC issued Opinion No. 569 affecting the two pending transmission ROE complaints against the Midcontinent ISO (MISO) transmission owners, in which FERC adopted a new methodology for determining base ROEs. Various parties sought rehearing. On December 23, 2019, the NETOs filed supplementary materials in the NETOs' four pending cases to respond to this new methodology because of the uncertainty of the applicability to the NETOs' cases. On May 21, 2020, the FERC issued its order in Opinion No. 569-A on the rehearing of the MISO transmission owners' cases, in which FERC again changed its methodology for determining the MISO transmission owners' base ROEs. On November 19, 2020, the FERC issued Opinion No. 569-B denying rehearing of Opinion No. 569-A and reaffirmed the methodology previously adopted in Opinion No. 569-A. The new methodology differs significantly from the methodology proposed by FERC in its October 16, 2018 order to determine the NETOs' base ROEs in its four pending cases. FERC Opinion Nos. 569-A and 569-B 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. At this time, Eversource cannot predict how and when FERC will address the Court’s findings on the remand of the MISO FERC opinions or any potential associated impact on the NETOs’ four pending ROE complaint cases.

Given the significant uncertainty regarding the applicability of the FERC opinions in the MISO transmission owners’ two complaint cases to the NETOs’ pending four complaint cases, Eversource concluded that there is no reasonable basis for a change to the reserve or recognized ROEs for any of the complaint periods at this time. As well, Eversource cannot reasonably estimate a range of loss for any of the four complaint proceedings

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at this time. Eversource, CL&P, NSTAR Electric and PSNH currently record revenues at the 10.57 percent base ROE and incentive cap at 11.74 percent established in the October 16, 2014 FERC order.

A change of 10 basis points to the base ROE used to establish the reserves would impact Eversource’s after-tax earnings by an average of approximately $3 million for each of the four 15-month complaint periods.

F.    Eversource and NSTAR Electric Boston Harbor Civil Action

In 2016, the United States Attorney on behalf of the United States Army Corps of Engineers filed a civil action in the United States District Court for the District of Massachusetts against NSTAR Electric, HEEC, and the Massachusetts Water Resources Authority (together with NSTAR Electric and HEEC, the "Defendants").  The action alleged that the Defendants failed to comply with certain permitting requirements related to the placement of the HEEC-owned electric distribution cable beneath Boston Harbor.  The parties reached a settlement pursuant to which HEEC agreed to install a new 115kV distribution cable across Boston Harbor to Deer Island, utilizing a different route, and remove portions of the existing cable. Construction of the new distribution cable was completed in August 2019 and removal of the portions of the existing cable was completed in January 2020.

On February 9, 2023, the parties filed a Voluntary Stipulation of Dismissal with Prejudice with the United States District Court for the District of Massachusetts whereby the parties agreed to dismiss all remaining claims, crossclaims and counterclaims with prejudice.

G.     CL&P Regulatory Matters

CL&P Tropical Storm Isaias Response Investigation: On April 28, 2021, PURA issued a final decision on CL&P’s compliance with its emergency response plan that concluded CL&P failed to comply with certain storm performance standards and was imprudent in certain instances regarding its preparation for, and response to, Tropical Storm Isaias. Based on its findings, PURA ordered CL&P to adjust its future rates in a pending or future rate proceeding to reflect a monetary penalty in the form of a downward adjustment of 90 basis points in its allowed rate of return on equity (ROE), which is currently 9.25 percent. On July 14, 2021, PURA issued a final decision in a penalty proceeding that included an assessment of $28.6 million, consisting of a $28.4 million civil penalty for non-compliance with storm performance standards to be provided as credits on customer bills and a $0.2 million fine for violations of accident reporting requirements to be paid to the State of Connecticut’s general fund. The $28.4 million performance penalty was credited to customers on electric bills beginning on September 1, 2021 over a one-year period. The $28.4 million is the maximum statutory penalty amount under applicable Connecticut law in effect at the time of Tropical Storm Isaias, which is 2.5 percent of CL&P’s annual distribution revenues. The liability for the performance penalty was recorded as a current regulatory liability on CL&P’s balance sheet and as a reduction to Operating Revenues on the year ended December 31, 2021 statement of income.

CL&P Settlement Agreement: On October 1, 2021, CL&P entered into a settlement agreement with the DEEP, Office of Consumer Counsel, Office of the Attorney General and the Connecticut Industrial Energy Consumers, resolving certain issues that arose in then-pending regulatory proceedings initiated by PURA. PURA approved the settlement agreement on October 27, 2021. In the settlement agreement, CL&P agreed to provide a total of $65 million of customer credits, which were distributed based on customer sales over a two-month billing period from December 1, 2021 to January 31, 2022. CL&P also agreed to irrevocably set aside $10 million in a customer assistance fund to provide bill payment assistance to certain existing non-hardship and hardship customers carrying arrearages, as approved by PURA, with the objective of disbursing the funds prior to April 30, 2022. Those customers were provided with $10 million of bill forgiveness in the first quarter of 2022. CL&P recorded a current regulatory liability of $75 million on the balance sheet associated with the provisions of the settlement agreement, with a $65 million pre-tax charge as a reduction to Operating Revenues associated with the customer credits and a $10 million charge to Operations and Maintenance expense associated with the customer assistance fund on the year ended December 31, 2021 statement of income.

In exchange for the $75 million of customer credits and assistance, PURA’s interim rate reduction docket was resolved without findings. As a result of the settlement agreement, neither the 90 basis point reduction to CL&P’s return on equity introduced in PURA’s storm-related decision issued April 28, 2021, nor the 45 basis point reduction to CL&P’s return on equity included in PURA’s decision issued September 14, 2021 in the interim rate reduction docket, will be implemented. CL&P has also agreed to freeze its current base distribution rates, subject to the customer credits described above, until no earlier than January 1, 2024. The rate freeze applies only to base distribution rates (including storm costs) and not to other rate mechanisms such as the retail rate components, rate reconciling mechanisms, formula rates and any other adjustment mechanisms. The rate freeze also does not apply to any cost recovery mechanism outside of the base distribution rates with regard to grid-modernization initiatives or any other proceedings, either currently pending or that may be initiated during the rate freeze period, that may place additional obligations on CL&P. The approval of the settlement agreement satisfies the Connecticut statute of rate review requirements that requires electric utilities to file a distribution rate case within four years of the last rate case.

As part of the settlement agreement, CL&P agreed to withdraw with prejudice its pending appeals of PURA’s decisions dated April 28, 2021 and July 14, 2021 related to Storm Isaias and agreed to waive its right to file an appeal and seek a judicial stay of the September 14, 2021 decision in the interim rate reduction docket. The settlement agreement assures that CL&P will have the opportunity to petition for and demonstrate the prudency of the storm costs incurred to respond to customer outages associated with Storm Isaias in a future ratemaking proceeding.

The cumulative pre-tax impact of the settlement agreement and the Storm Isaias assessment imposed in PURA’s April 28, 2021 and July 14, 2021 decisions totaled $103.6 million, and the after-tax earnings impact was $86.1 million, or $0.25 per share, for the year ended December 31, 2021.

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H.     Litigation and Legal Proceedings

Eversource, including CL&P, NSTAR Electric and PSNH, are involved in legal, tax and regulatory proceedings regarding matters arising in the ordinary course of business, which involve management's assessment to determine the probability of whether a loss will occur and, if probable, its best estimate of probable loss.  The Company records and discloses losses when these losses are probable and reasonably estimable, and discloses matters when losses are probable but not estimable or when losses are reasonably possible.  Legal costs related to the defense of loss contingencies are expensed as incurred.

14.     LEASES

Eversource, including CL&P, NSTAR Electric and PSNH, has entered into lease agreements as a lessee for the use of land, office space, service centers, vehicles, information technology, and equipment. These lease agreements are classified as either finance or operating leases and the liability and right-of-use asset are recognized on the balance sheet at lease commencement.  Leases with an initial term of 12 months or less are not recorded on the balance sheet and are recognized as lease expense on a straight-line basis over the lease term.

Eversource determines whether or not a contract contains a lease based on whether or not it provides Eversource with the use of a specifically identified asset for a period of time, as well as both the right to direct the use of that asset and receive the significant economic benefits of the asset. Eversource has elected the practical expedient to not separate non-lease components from lease components and instead to account for both as a single lease component, with the exception of the information technology asset class where the lease and non-lease components are separated.

The provisions of Eversource, CL&P, NSTAR Electric and PSNH lease agreements contain renewal options. The renewal options range from one year to twenty years. The renewal period is included in the measurement of the lease liability if it is reasonably certain that Eversource will exercise these renewal options.

For leases entered into or modified after the January 1, 2019 implementation date of the leases standard under Topic 842, the discount rate utilized for classification and measurement purposes as of the inception date of the lease is based on each company's collateralized incremental interest rate to borrow over a comparable term for an individual lease because the rate implicit in the lease is not determinable.

CL&P and PSNH entered into certain contracts for the purchase of energy that qualify as leases.  These contracts do not have minimum lease payments and therefore are not recognized as a lease liability on the balance sheet and are not reflected in the future minimum lease payments table below.  Expense related to these contracts is included as variable lease cost in the table below. The expense and long-term obligation for these contracts are also included in Note 13B, "Commitments and Contingencies - Long-Term Contractual Arrangements," to the financial statements.  

The components of lease cost, prior to amounts capitalized, are as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Finance Lease Cost:
Amortization of Right-of-use-Assets	$	8.3	$	4.6	$	2.6
Interest on Lease Liabilities	2.0		3.9		1.4
Total Finance Lease Cost	10.3		8.5		4.0
Operating Lease Cost	11.6		12.2		11.1
Variable Lease Cost	78.1		61.0		57.8
Total Lease Cost	$	100.0	$	81.7	$	72.9

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Finance Lease Cost:
Amortization of Right-of-use-Assets	$	—	$	0.2	$	0.1	$	0.5	$	0.2	$	0.1	$	0.7	$	0.2	$	0.1
Interest on Lease Liabilities	—		0.6		—		0.1		0.6		—		0.3		0.6		—
Total Finance Lease Cost	—		0.8		0.1		0.6		0.8		0.1		1.0		0.8		0.1
Operating Lease Cost	0.3		2.3		0.1		0.3		2.3		0.1		0.6		2.1		0.1
Variable Lease Cost	25.6		—		52.5		16.2		—		44.8		12.2		—		45.6
Total Lease Cost	$	25.9	$	3.1	$	52.7	$	17.1	$	3.1	$	45.0	$	13.8	$	2.9	$	45.8

Operating lease cost, net of the capitalized portion, is included in Operations and Maintenance (or Purchased Power, Purchased Natural Gas and Transmission expense for transmission leases) on the statements of income. Amortization of finance lease assets is included in Depreciation on the statements of income. Interest expense on finance leases is included in Interest Expense on the statements of income.

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Supplemental balance sheet information related to leases is as follows:

		As of December 31, 2022								As of December 31, 2021
(Millions of Dollars)	Balance Sheet Classification	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Operating Leases:
Right-of-use-Assets, Net	Other Long-Term Assets	$	56.9	$	2.2	$	22.5	$	—	$	47.2	$	0.1	$	24.3	$	0.3
Operating Lease Liabilities
Current Portion	Other Current Liabilities	$	9.0	$	0.6	$	1.2	$	—	$	10.0	$	0.1	$	1.1	$	—
Long-Term	Other Long-Term Liabilities	47.9		1.6		21.3		—		37.2		—		23.2		0.3
Total Operating Lease Liabilities		$	56.9	$	2.2	$	22.5	$	—	$	47.2	$	0.1	$	24.3	$	0.3
Finance Leases:
Right-of-use-Assets, Net	Property, Plant and Equipment, Net	$	54.5	$	—	$	3.2	$	—	$	58.0	$	—	$	3.3	$	0.7
Finance Lease Liabilities
Current Portion	Other Current Liabilities	$	3.8	$	—	$	—	$	—	$	3.9	$	—	$	—	$	0.1
Long-Term	Other Long-Term Liabilities	54.2		—		4.9		—		55.4		—		4.9		0.6
Total Finance Lease Liabilities		$	58.0	$	—	$	4.9	$	—	$	59.3	$	—	$	4.9	$	0.7

The finance lease payments that NSTAR Electric will make over the next twelve months are entirely interest-related, due to escalating payments. As such, none of the finance lease payments over the next twelve months will reduce the finance lease liability.

Other information related to leases is as follows:

	As of December 31,
	2022								2021
	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Weighted-Average Remaining Lease Term (Years):
Operating Leases	11		4		17		—		13		7		18		7
Finance Leases	15		—		19		—		16		—		20		7
Weighted-Average Discount Rate (Percentage):
Operating Leases	3.2	%	3.8	%	4.0	%	—	%	4.1	%	3.0	%	4.0	%	3.7	%
Finance Leases	2.7	%	—	%	2.9	%	—	%	2.7	%	—	%	2.9	%	3.5	%

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2022
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	11.3	$	0.3	$	2.1	$	0.1
Operating Cash Flows from Finance Leases	2.0		—		0.6		—
Financing Cash Flows from Finance Leases	3.9		—		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	18.9		2.4		—		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	3.5		—		—		—

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2021
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	12.1	$	0.3	$	2.1	$	0.1
Operating Cash Flows from Finance Leases	3.4		0.1		0.6		—
Financing Cash Flows from Finance Leases	4.1		1.4		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	2.1		—		1.9		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	2.3		—		—		—

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(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2020
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	10.9	$	0.6	$	1.8	$	0.1
Operating Cash Flows from Finance Leases	1.7		0.3		0.6		—
Financing Cash Flows from Finance Leases	2.8		1.6		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	0.6		0.1		0.2		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	0.7		—		0.3		—

In 2020, Eversource also acquired $14.7 million of right-of-use assets in exchange for the assumption of new operating lease liabilities and $54.2 million of right-of-use assets in exchange for the assumption of new finance lease liabilities as a result of the CMA asset acquisition.

Future minimum lease payments, excluding variable costs, under long-term leases, as of December 31, 2022 are as follows:

	Operating Leases						Finance Leases
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		Eversource		NSTAR Electric
Year Ending December 31,
2023	$	10.3	$	0.7	$	2.1	$	5.9	$	0.6
2024	9.3		0.7		2.1		5.9		0.6
2025	6.4		0.7		1.7		5.9		0.6
2026	5.5		0.3		1.7		5.4		0.7
2027	5.2		—		1.7		5.4		0.7
Thereafter	31.2		—		23.6		50.9		11.8
Future lease payments	67.9		2.4		32.9		79.4		15.0
Less amount representing interest	11.0		0.2		10.4		21.4		10.1
Present value of future minimum lease payments	$	56.9	$	2.2	$	22.5	$	58.0	$	4.9

15.     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 Amount		Fair Value		Carrying Amount		Fair Value		Carrying Amount		Fair Value		Carrying Amount		Fair Value
As of December 31, 2022:
Preferred Stock Not Subject to Mandatory Redemption	$	155.6	$	136.7	$	116.2	$	99.2	$	43.0	$	37.5	$	—	$	—
Long-Term Debt	21,044.1		18,891.3		4,216.5		3,828.3		4,425.1		4,091.8		1,164.6		970.5
Rate Reduction Bonds	453.7		424.7		—		—		—		—		453.7		424.7
As of December 31, 2021:
Preferred Stock Not Subject to Mandatory Redemption	$	155.6	$	166.3	$	116.2	$	122.3	$	43.0	$	44.0	$	—	$	—
Long-Term Debt	18,216.7		19,636.3		4,215.4		4,848.9		3,985.4		4,453.5		1,163.8		1,220.6
Rate Reduction Bonds	496.9		543.3		—		—		—		—		496.9		543.3

Derivative Instruments and Marketable Securities: Derivative instruments and investments in marketable securities are carried at fair value.  For further information, see Note 4, "Derivative Instruments," and Note 5, "Marketable Securities," to the financial statements.  

See Note 1G, "Summary of Significant Accounting Policies – Fair Value Measurements," for the fair value measurement policy and the fair value hierarchy.

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16.     ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

The changes in accumulated other comprehensive income/(loss) by component, net of tax, are as follows:

	For the Year Ended December 31, 2022								For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Qualified Cash Flow Hedging Instruments		Unrealized Gains/(Losses) on Marketable Securities		Defined Benefit Plans		Total		Qualified Cash Flow Hedging Instruments		Unrealized Gains/(Losses) on Marketable Securities		Defined Benefit Plans		Total
Balance as of January 1st	$	(0.4)	$	0.4	$	(42.3)	$	(42.3)	$	(1.4)	$	1.1	$	(76.1)	$	(76.4)
OCI Before Reclassifications	—		(1.6)		(2.5)		(4.1)		—		(0.7)		24.1		23.4
Amounts Reclassified from AOCI	—		—		7.0		7.0		1.0		—		9.7		10.7
Net OCI	—		(1.6)		4.5		2.9		1.0		(0.7)		33.8		34.1
Balance as of December 31st	$	(0.4)	$	(1.2)	$	(37.8)	$	(39.4)	$	(0.4)	$	0.4	$	(42.3)	$	(42.3)

Defined benefit plan OCI amounts before reclassifications relate to actuarial gains and losses that arose during the year and were recognized in AOCI. The unamortized actuarial gains and losses and prior service costs on the defined benefit plans are amortized from AOCI into Other Income, Net over the average future employee service period, and are reflected in amounts reclassified from AOCI. The related tax effects of the defined benefit plan OCI amounts before reclassifications recognized in AOCI were net deferred tax assets of $1.3 million and $6.0 million in 2022 and 2020, respectively and were net deferred tax liabilities of $8.3 million in 2021.

The following table sets forth the amounts reclassified from AOCI by component and the impacted line item on the statements of income:

	Amounts Reclassified from AOCI
Eversource (Millions of Dollars)	For the Years Ended December 31,						Statements of Income Line Item Impacted
	2022		2021		2020
Qualified Cash Flow Hedging Instruments	$	—	$	(1.7)	$	(2.5)	Interest Expense
Tax Effect	—		0.7		0.9		Income Tax Expense
Qualified Cash Flow Hedging Instruments, Net of Tax	$	—	$	(1.0)	$	(1.6)
Defined Benefit Plan Costs:
Amortization of Actuarial Losses	$	(9.0)	$	(13.1)	$	(8.1)	Other Income, Net (1)
Amortization of Prior Service Cost	(0.3)		—		(0.3)		Other Income, Net (1)
Total Defined Benefit Plan Costs	(9.3)		(13.1)		(8.4)
Tax Effect	2.3		3.4		2.1		Income Tax Expense
Defined Benefit Plan Costs, Net of Tax	$	(7.0)	$	(9.7)	$	(6.3)
Total Amounts Reclassified from AOCI, Net of Tax	$	(7.0)	$	(10.7)	$	(7.9)

(1)    These amounts are included in the computation of net periodic Pension, SERP and PBOP costs.  See Note 1K, "Summary of Significant Accounting Policies – Other Income, Net" and Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," for further information.

17.     DIVIDEND RESTRICTIONS

Eversource parent's ability to pay dividends may be affected by certain state statutes, the ability of its subsidiaries to pay common dividends and the leverage restriction tied to its consolidated total indebtedness to total capitalization ratio requirement in its revolving credit agreements.  Pursuant to the joint revolving credit agreement of Eversource, CL&P, PSNH, NSTAR Gas, Yankee Gas, EGMA and Aquarion Water Company of Connecticut, and to the NSTAR Electric revolving credit agreement, each company is required to maintain consolidated total indebtedness to total capitalization ratio of no greater than 65 percent at the end of each fiscal quarter. As of December 31, 2022, all companies were in compliance with such covenant and in compliance with all such provisions of the revolving credit agreements that may restrict the payment of dividends as of December 31, 2022.

The Retained Earnings balances subject to dividend restrictions were $5.53 billion for Eversource, $2.46 billion for CL&P, $2.92 billion for NSTAR Electric and $572.1 million for PSNH as of December 31, 2022.

CL&P, NSTAR Electric and PSNH are subject to Section 305 of the Federal Power Act that makes it unlawful for a public utility to make or pay a dividend from any funds "properly included in its capital account." Management believes that this Federal Power Act restriction, as applied to CL&P, NSTAR Electric and PSNH, would not be construed or applied by the FERC to prohibit the payment of dividends from retained earnings for lawful and legitimate business purposes. In addition, certain state statutes may impose additional limitations on such companies and, including but not limited to, on NSTAR Gas, Yankee Gas, EGMA, Aquarion Water Company of Connecticut, Aquarion Water Company of Massachusetts and Aquarion Water Company of New Hampshire. Such state law restrictions do not restrict the payment of dividends from retained earnings or net income.

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18.     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
	Par Value		Authorized as of December 31, 2022 and 2021	Issued as of December 31,
				2022	2021
Eversource	$	5	380,000,000	359,984,073	357,818,402
CL&P	$	10	24,500,000	6,035,205	6,035,205
NSTAR Electric	$	1	100,000,000	200	200
PSNH	$	1	100,000,000	301	301

Common Share Issuances and 2022 Equity Distribution Agreement: On May 11, 2022, Eversource entered into an equity distribution agreement pursuant to which it may offer and sell up to $1.2 billion of its common shares from time to time through an “at-the-market” (ATM) equity offering program. Eversource may issue and sell its common shares through its sales agents during the term of this agreement. Shares may be offered in transactions on the New York Stock Exchange, in the over-the-counter market, through negotiated transactions or otherwise. Sales may be made at either market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. In 2022, Eversource issued 2,165,671 common shares, which resulted in proceeds of $197.1 million, net of issuance costs. Eversource used the net proceeds received for general corporate purposes.

Treasury Shares: As of December 31, 2022 and 2021, there were 11,540,218 and 13,415,206 Eversource common shares held as treasury shares, respectively.  As of December 31, 2022 and 2021, there were 348,443,855 and 344,403,196 Eversource common shares outstanding, respectively.

Acquisition of The Torrington Water Company: On October 3, 2022, Aquarion acquired The Torrington Water Company (TWC) following the receipt of all required approvals. The acquisition was structured as a stock-for-stock exchange, and Eversource issued 925,264 treasury shares at closing for a purchase price of $72.1 million.

Acquisition of New England Service Company: On December 1, 2021, Aquarion acquired New England Service Company (NESC), pursuant to a definitive agreement entered into on April 8, 2021. The acquisition was structured as a stock-for-stock merger and Eversource issued 462,517 treasury shares at closing for a purchase price of $38.1 million.

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. Eversource also issued treasury shares for its December 2021 and October 2022 water business acquisitions. 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.

19.     PREFERRED STOCK NOT SUBJECT TO MANDATORY REDEMPTION

The CL&P and NSTAR Electric preferred stock is not subject to mandatory redemption and is presented as a noncontrolling interest of a subsidiary in Eversource's financial statements.

CL&P is authorized to issue up to 9,000,000 shares of preferred stock, par value $50 per share, and NSTAR Electric is authorized to issue 2,890,000 shares of preferred stock, par value $100 per share. Holders of preferred stock of CL&P and NSTAR Electric are entitled to receive cumulative dividends in preference to any payment of dividends on the common stock. Upon liquidation, holders of preferred stock of CL&P and NSTAR Electric are entitled to receive a liquidation preference before any distribution to holders of common stock in an amount equal to the par value of the preferred stock plus accrued and unpaid dividends. If the net assets were to be insufficient to pay the liquidation preference in full, then the net assets would be distributed ratably to all holders of preferred stock. The preferred stock of CL&P and NSTAR Electric is subject to optional redemption by the CL&P and NSTAR Electric Boards of Directors at any time.

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Details of preferred stock not subject to mandatory redemption are as follows (in millions, except in redemption price and shares):

		Redemption Price Per Share		Shares Outstanding as of December 31,		As of December 31,
Series				2022	2021	2022		2021
CL&P
$1.90	Series of 1947	$	52.50	163,912	163,912	$	8.2	$	8.2
$2.00	Series of 1947	$	54.00	336,088	336,088	16.8		16.8
$2.04	Series of 1949	$	52.00	100,000	100,000	5.0		5.0
$2.20	Series of 1949	$	52.50	200,000	200,000	10.0		10.0
3.90%	Series of 1949	$	50.50	160,000	160,000	8.0		8.0
$2.06	Series E of 1954	$	51.00	200,000	200,000	10.0		10.0
$2.09	Series F of 1955	$	51.00	100,000	100,000	5.0		5.0
4.50%	Series of 1956	$	50.75	104,000	104,000	5.2		5.2
4.96%	Series of 1958	$	50.50	100,000	100,000	5.0		5.0
4.50%	Series of 1963	$	50.50	160,000	160,000	8.0		8.0
5.28%	Series of 1967	$	51.43	200,000	200,000	10.0		10.0
$3.24	Series G of 1968	$	51.84	300,000	300,000	15.0		15.0
6.56%	Series of 1968	$	51.44	200,000	200,000	10.0		10.0
Total CL&P				2,324,000	2,324,000	$	116.2	$	116.2
NSTAR Electric
4.25%	Series of 1956	$	103.625	180,000	180,000	$	18.0	$	18.0
4.78%	Series of 1958	$	102.80	250,000	250,000	25.0		25.0
Total NSTAR Electric				430,000	430,000	$	43.0	$	43.0
Fair Value Adjustment due to Merger with NSTAR						(3.6)		(3.6)
Other
6.00%	Series of 1958	$	100.00	23	23	$	—	$	—
Total Eversource - Noncontrolling Interest - Preferred Stock of Subsidiaries						$	155.6	$	155.6

20.     COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS

Dividends on the preferred stock of CL&P and NSTAR Electric totaled $7.5 million for each of the years ended December 31, 2022, 2021 and 2020.  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 December 31, 2022 and 2021.  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.

For the years ended December 31, 2022, 2021 and 2020, there was no change in ownership of the common equity of CL&P and NSTAR Electric.  

21.     EARNINGS PER SHARE

Basic EPS is computed based upon the weighted average number of common shares outstanding during each period.  Diluted EPS is computed on the basis of the weighted average number of common shares outstanding plus the potential dilutive effect of certain share-based compensation awards and the equity forward sale agreement, as if they were converted into outstanding common shares.  The dilutive effect of unvested RSU and performance share awards, as well as the equity forward sale agreement, 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.  

Earnings per share dilution related to the equity forward sale agreement was determined under the treasury stock method until settlement of the forward sale agreement. Under this method, the number of Eversource common shares used in calculating diluted EPS was deemed to be increased by the excess, if any, of the number of shares that would be issued upon physical settlement of the forward sale agreement less the number of shares that would be purchased by Eversource in the market (based on the average market price during the same reporting period) using the proceeds receivable upon settlement (based on the adjusted forward sale price at the end of that reporting period). Share dilution occurred when the average market price of Eversource's common shares was higher than the adjusted forward sale price. Eversource physically settled all remaining shares under the forward sale agreement as of March 26, 2020.

For the years ended December 31, 2022 and 2021, there were no antidilutive share awards excluded from the computation. For the year ended December 31, 2020, 39,560 antidilutive share awards were excluded from the EPS computation, as their impact would have been antidilutive. Antidilutive shares pertained to a purchase option extended to underwriters in connection with Eversource's June 2020 common share issuance.

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The following table sets forth the components of basic and diluted EPS:

Eversource (Millions of Dollars, except share information)	For the Years Ended December 31,
	2022		2021		2020
Net Income Attributable to Common Shareholders	$	1,404.9	$	1,220.5	$	1,205.2
Weighted Average Common Shares Outstanding:
Basic	346,783,444		343,972,926		338,836,147
Dilutive Effect of:
Share-Based Compensation Awards and Other	463,324		658,130		738,994
Equity Forward Sale Agreement	—		—		271,921
Total Dilutive Effect	463,324		658,130		1,010,915
Diluted	347,246,768		344,631,056		339,847,062
Basic EPS	$	4.05	$	3.55	$	3.56
Diluted EPS	$	4.05	$	3.54	$	3.55

22.    REVENUES

Revenue is recognized when promised goods or services (referred to as performance obligations) are transferred to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. A five-step model is used for recognizing and measuring revenue from contracts with customers, which includes identifying the contract with the customer, identifying the performance obligations promised within the contract, determining the transaction price (the amount of consideration to which the company expects to be entitled), allocating the transaction price to the performance obligations and recognizing revenue when (or as) the performance obligation is satisfied.

The following tables present operating revenues disaggregated by revenue source:

	For the Year Ended December 31, 2022
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	4,796.1	$	1,204.9	$	—	$	141.7	$	—	$	—	$	6,142.7
Commercial	2,903.3		648.5		—		66.5		—		(4.1)		3,614.2
Industrial	374.9		199.7		—		4.7		—		(20.1)		559.2
Total Retail Tariff Sales Revenues	8,074.3		2,053.1		—		212.9		—		(24.2)		10,316.1
Wholesale Transmission Revenues	—		—		1,700.5		—		—		(1,264.5)		436.0
Wholesale Market Sales Revenues	1,190.9		140.8		—		3.8		—		—		1,335.5
Other Revenues from Contracts with Customers	72.3		5.6		14.1		8.4		1,435.5		(1,425.3)		110.6
Amortization of/(Reserve for) Revenues    Subject to Refund	72.0		—		0.7		(0.7)		—		—		72.0
Total Revenues from Contracts with Customers	9,409.5		2,199.5		1,715.3		224.4		1,435.5		(2,714.0)		12,270.2
Alternative Revenue Programs	(15.4)		14.8		92.7		(2.5)		—		(84.3)		5.3
Other Revenues	11.2		1.3		0.7		0.6		—		—		13.8
Total Operating Revenues	$	9,405.3	$	2,215.6	$	1,808.7	$	222.5	$	1,435.5	$	(2,798.3)	$	12,289.3

	For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	3,989.8	$	1,000.3	$	—	$	133.5	$	—	$	—	$	5,123.6
Commercial	2,486.1		497.6		—		62.8		—		(5.1)		3,041.4
Industrial	345.3		167.2		—		4.3		—		(17.1)		499.7
Total Retail Tariff Sales Revenues	6,821.2		1,665.1		—		200.6		—		(22.2)		8,664.7
Wholesale Transmission Revenues	—		—		1,751.3		—		86.6		(1,384.7)		453.2
Wholesale Market Sales Revenues	575.8		82.1		—		3.9		—		—		661.8
Other Revenues from Contracts with Customers	78.1		5.1		13.6		7.5		1,267.4		(1,257.7)		114.0
Reserve for Revenues Subject to Refund	(71.1)		—		(5.0)		(2.6)		—		—		(78.7)
Total Revenues from Contracts with Customers	7,404.0		1,752.3		1,759.9		209.4		1,354.0		(2,664.6)		9,815.0
Alternative Revenue Programs	14.7		37.0		(126.1)		1.5		—		114.6		41.7
Other Revenues	4.9		0.3		0.8		0.4		—		—		6.4
Total Operating Revenues	$	7,423.6	$	1,789.6	$	1,634.6	$	211.3	$	1,354.0	$	(2,550.0)	$	9,863.1

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	For the Year Ended December 31, 2020
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	3,951.5	$	644.9	$	—	$	145.1	$	—	$	—	$	4,741.5
Commercial	2,353.4		361.9		—		62.4		—		(4.8)		2,772.9
Industrial	327.1		107.4		—		4.8		—		(13.7)		425.6
Total Retail Tariff Sales Revenues	6,632.0		1,114.2		—		212.3		—		(18.5)		7,940.0
Wholesale Transmission Revenues	—		—		1,557.3		—		74.2		(1,290.6)		340.9
Wholesale Market Sales Revenues	327.3		43.0		—		3.8		—		—		374.1
Other Revenues from Contracts with Customers	79.3		5.7		13.3		3.5		1,161.7		(1,152.0)		111.5
Total Revenues from Contracts with Customers	7,038.6		1,162.9		1,570.6		219.6		1,235.9		(2,461.1)		8,766.5
Alternative Revenue Programs	88.1		44.7		(35.2)		(4.7)		—		37.1		130.0
Other Revenues	5.6		1.1		0.7		0.5		—		—		7.9
Total Operating Revenues	$	7,132.3	$	1,208.7	$	1,536.1	$	215.4	$	1,235.9	$	(2,424.0)	$	8,904.4

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	2,397.2	$	1,601.8	$	797.1	$	1,994.2	$	1,375.8	$	619.8	$	2,011.1	$	1,365.8	$	574.6
Commercial	1,067.9		1,457.4		380.8		890.6		1,265.0		332.2		878.3		1,176.8		299.9
Industrial	146.4		135.8		92.7		131.4		119.1		94.8		137.5		106.4		83.2
Total Retail Tariff Sales Revenues	3,611.5		3,195.0		1,270.6		3,016.2		2,759.9		1,046.8		3,026.9		2,649.0		957.7
Wholesale Transmission Revenues	755.1		670.4		275.0		863.3		616.3		271.7		754.8		576.5		226.0
Wholesale Market Sales Revenues	873.7		215.0		102.2		408.8		109.2		57.8		230.1		58.4		38.8
Other Revenues from Contracts    with Customers	30.2		46.9		11.8		26.7		56.2		11.3		32.9		43.6		14.2
Amortization of/(Reserve for) Revenues    Subject to Refund	72.7		—		—		(76.1)		—		—		—		—		4.6
Total Revenues from Contracts    with Customers	5,343.2		4,127.3		1,659.6		4,238.9		3,541.6		1,387.6		4,044.7		3,327.5		1,241.3
Alternative Revenue Programs	56.5		0.7		20.1		(78.9)		(15.1)		(17.4)		(4.2)		54.5		2.6
Other Revenues	1.8		7.2		2.9		0.4		3.4		1.9		2.2		3.5		0.6
Eliminations	(583.8)		(552.1)		(207.8)		(523.0)		(473.5)		(194.9)		(495.2)		(444.4)		(165.4)
Total Operating Revenues	$	4,817.7	$	3,583.1	$	1,474.8	$	3,637.4	$	3,056.4	$	1,177.2	$	3,547.5	$	2,941.1	$	1,079.1

Retail Tariff Sales: Regulated utilities provide products and services to their regulated customers under rates, pricing, payment terms and conditions of service, regulated by each state regulatory agency. The arrangement whereby a utility provides commodity service to a customer for a price approved by the respective state regulatory commission is referred to as a tariff sale contract, and the tariff governs all aspects of the provision of regulated services by utilities. The majority of revenue for Eversource, CL&P, NSTAR Electric and PSNH is derived from regulated retail tariff sales for the sale and distribution of electricity, natural gas and water to residential, commercial and industrial retail customers.

The utility's performance obligation for the regulated tariff sales is to provide electricity, natural gas or water to the customer as demanded. The promise to provide the commodity represents a single performance obligation, as it is a promise to transfer a series of distinct goods or services that are substantially the same and that have the same pattern of transfer to the customer. Revenue is recognized over time as the customer simultaneously receives and consumes the benefits provided by the utility, and the utility satisfies its performance obligation. Revenue is recognized based on the output method as there is a directly observable output to the customer (electricity, natural gas or water units delivered to the customer and immediately consumed). Each Eversource utility is entitled to be compensated for performance completed to date (service taken by the customer) until service is terminated.

In regulated tariff sales, the transaction prices are the rates approved by the respective state regulatory commissions.  In general, rates can only be changed through formal proceedings with the state regulatory commissions. These rates are designed to recover the costs to provide service to customers and include a return on investment. Regulatory commission-approved tracking mechanisms are included in these rates and are also used to recover, on a fully-reconciling basis, certain costs, such as the procurement of energy supply, retail transmission charges, energy efficiency program costs, net metering for distributed generation, and restructuring and stranded costs, among others. These tracking mechanisms result in rates being changed periodically to ensure recovery of actual costs incurred and the refund of any overcollection of costs.

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Customers may elect to purchase electricity from each Eversource electric utility or may contract separately with a competitive third party supplier. Revenue is not recorded for the sale of the electricity commodity to customers who have contracted separately with these suppliers, only the delivery to a customer, as the utility is acting as an agent on behalf of the third party supplier.

Wholesale Transmission Revenues:  The Eversource electric transmission-owning companies (CL&P, NSTAR Electric and PSNH) each own and maintain transmission facilities that are part of an interstate power transmission grid over which electricity is transmitted throughout New England. CL&P, NSTAR Electric and PSNH, as well as most other New England utilities, are parties to a series of agreements that provide for coordinated planning and operation of the region's transmission facilities and the rules by which they acquire transmission services.  The Eversource electric transmission-owning companies have a combination of FERC-approved regional and local formula rates that work in tandem to recover all their transmission costs. These rates are part of the ISO-NE Tariff. Regional rates recover the costs of higher voltage transmission facilities that benefit the region and are collected from all New England transmission customers, including the Eversource distribution businesses. Eversource's local rates recover the costs of transmission facilities that do not provide a benefit to the region, and are collected from Eversource's distribution businesses and other transmission customers. The distribution businesses of Eversource, in turn, recover the FERC approved charges from retail customers through annual tracking mechanisms, which are retail tariff sales.

The utility's performance obligation for regulated wholesale transmission sales is to provide transmission services to the customer as demanded. The promise to provide transmission service represents a single performance obligation. The transaction prices are the transmission rate formulas as defined by the ISO-NE Tariff and are regulated and established by FERC. Wholesale transmission revenue is recognized over time as the performance obligation is completed, which occurs as transmission services are provided to customers. The revenue is recognized based on the output method. Each Eversource utility is entitled to be compensated for performance completed to date (e.g., use of the transmission system by the customer).

Wholesale Market Sales Revenues: Wholesale market sales transactions include sales of energy and energy-related products into the ISO-NE wholesale electricity market, sales of natural gas to third party marketers, and also the sale of RECs to various counterparties. ISO-NE oversees the region's wholesale electricity market and administers the transactions and terms and conditions, including payment terms, which are established in the ISO-NE tariff, between the buyers and sellers in the market. Pricing is set by the wholesale market. The wholesale transactions in the ISO-NE market occur on a day-ahead basis or a real-time basis (daily) and are, therefore, short-term. Transactions are tracked and reported by ISO-NE net by the hour, which is the net hourly position of energy sales and purchases by each market participant. The performance obligation for ISO-NE energy transactions is defined to be the net by hour transaction. Revenue is recognized when the performance obligation for these energy sales transactions is satisfied, which is when the sale occurs and the energy is transferred to the customer. For sales of natural gas, transportation, and natural gas pipeline capacity to third party marketers, revenue is recognized when the performance obligation is satisfied at the point in time the sale occurs and the natural gas or related product is transferred to the marketer. RECs are sold to various counterparties, and revenue is recognized when the performance obligation is satisfied upon transfer of title to the customer through the New England Power Pool Generation Information System. Wholesale transactions also include the sale of CL&P’s, NSTAR Electric’s and PSNH’s transmission rights associated with their proportionate equity ownership share in the transmission lines of the Hydro-Québec system in Canada.

Other Revenues from Contracts with Customers: Other revenues from contracts with customers primarily include property rentals that are not deemed leases. These revenues are generally recognized on a straight-line basis over time as the service is provided to the customer. Other revenues also include revenues from Eversource's service company, which is eliminated in consolidation.

Amortization of/(Reserve for) Revenues Subject to Refund: A reserve is recorded as a reduction to revenues when future refunds to customers are deemed probable. The reserve is reversed as refunds are provided to customers in rates. Amortization of Revenues Subject to Refund within the Electric Distribution segment in 2022 represents the reversal of a 2021 reserve at CL&P established to provide bill credits to customers as a result of the settlement agreement on October 1, 2021 and a storm performance penalty assessed by PURA. The reserve was reversed as customer credits were distributed to CL&P’s customers in retail electric rates. Total customer credits as a result of the 2021 settlement and civil penalty of $93.4 million were recorded as a reserve for revenues subject to refund within current regulatory liabilities and reflected as a reduction to Operating Revenues on the 2021 income statement. The settlement amount of $65 million was refunded over a two-month billing period from December 1, 2021 to January 31, 2022 and the civil penalty of $28.4 million was refunded over a one year billing period, which began September 1, 2021.

The Connecticut water business continues to record a regulatory liability and reduction to revenues to reflect the difference between the 35 percent federal corporate income tax rate included in base distribution rates charged to customers and the 21 percent federal corporate income tax rate currently effective. This reserve will continue until base distribution rates are updated to reflect the lower federal tax rate.

Alternative Revenue Programs: In accordance with accounting guidance for rate-regulated operations, certain of Eversource's utilities' rate making mechanisms qualify as alternative revenue programs (ARPs) if they meet specified criteria, in which case revenues may be recognized prior to billing based on allowed levels of collection in rates. Eversource's utility companies recognize revenue and record a regulatory asset or liability once the condition or event allowing for the automatic adjustment of future rates occurs. ARP revenues include both the recognition of the deferral adjustment to ARP revenues, when the regulator-specified condition or event allowing for additional billing or refund has occurred, and an equal and offsetting reversal of the ARP deferral to revenues as those amounts are reflected in the price of service in subsequent periods.

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Eversource’s ARPs include the revenue decoupling mechanism, the annual reconciliation adjustment to transmission formula rates, and certain capital tracker mechanisms. Certain Eversource electric, natural gas and water companies, including CL&P and NSTAR Electric, have revenue decoupling mechanisms approved by a regulatory commission (decoupled companies). Decoupled companies’ distribution revenues are not directly based on sales volumes. The decoupled companies reconcile their annual base distribution rate recovery to pre-established levels of baseline distribution delivery service revenues, with any difference between the allowed level of distribution revenue and the actual amount realized adjusted through subsequent rates. The transmission formula rates provide for the annual reconciliation and recovery or refund of estimated costs to actual costs.  The financial impacts of differences between actual and estimated costs are deferred for future recovery from, or refund to, transmission customers.  This transmission deferral reconciles billed transmission revenues to the revenue requirement for our transmission businesses.

Other Revenues: Other Revenues include certain fees charged to customers that are not considered revenue from contracts with customers. Other revenues also include lease revenues under lessor accounting guidance of $4.0 million ($0.8 million at CL&P and $2.5 million at NSTAR Electric), $4.8 million ($0.8 million at CL&P and $3.1 million at NSTAR Electric), and $4.3 million, ($0.8 million at CL&P and $2.7 million at NSTAR Electric) for the years ended December 31, 2022, 2021 and 2020, respectively.

Intercompany Eliminations: Intercompany eliminations are primarily related to the Eversource electric transmission revenues that are derived from ISO-NE regional transmission charges to the distribution businesses of CL&P, NSTAR Electric and PSNH that recover the costs of the wholesale transmission business, and revenues from Eversource's service company. Intercompany revenues and expenses between the Eversource wholesale transmission businesses and the Eversource distribution businesses and from Eversource's service company are eliminated in consolidation and included in "Eliminations" in the tables above.

Receivables: Receivables, Net on the balance sheet primarily includes trade receivables from retail customers and customers related to wholesale transmission contracts, wholesale market sales, sales of RECs, and property rentals. In general, retail tariff customers and wholesale transmission customers are billed monthly and the payment terms are generally due and payable upon receipt of the bill.

Unbilled Revenues: Unbilled Revenues on the balance sheet represent estimated amounts due from retail customers for electricity, natural gas or water delivered to customers but not yet billed. The utility company has satisfied its performance obligation and the customer has received and consumed the commodity as of the balance sheet date, and therefore, the utility company records revenue for those services in the period the services were provided. Only the passage of time is required before the company is entitled to payment for the satisfaction of the performance obligation. Payment from customers is due monthly as services are rendered and amounts are billed. Actual amounts billed to customers when meter readings become available may vary from the estimated amount.

Unbilled revenues are recognized by allocating estimated unbilled sales volumes to the respective customer classes, and then applying an estimated rate by customer class to those sales volumes. Unbilled revenue estimates reflect seasonality, weather, customer usage patterns, customer rates in effect for customer classes, and the timing of customer billing. The companies that have a decoupling mechanism record a regulatory deferral to reflect the actual allowed amount of revenue associated with their respective decoupled distribution rate design.

Practical Expedients: Eversource has elected practical expedients in the accounting guidance that allow the company to record revenue in the amount that the company has a right to invoice, if that amount corresponds directly with the value to the customer of the company's performance to date, and not to disclose related unsatisfied performance obligations. Retail and wholesale transmission tariff sales fall into this category, as these sales are recognized as revenue in the period the utility provides the service and completes the performance obligation, which is the same as the monthly amount billed to customers. There are no other material revenue streams for which Eversource has unsatisfied performance obligations.

23.     SEGMENT INFORMATION

Eversource is organized into the Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution reportable segments and Other based on a combination of factors, including the characteristics of each segments' services, the sources of operating revenues and expenses and the regulatory environment in which each segment operates.  These reportable segments represent substantially all of Eversource's total consolidated revenues.  Revenues from the sale of electricity, natural gas and water primarily are derived from residential, commercial and industrial customers and are not dependent on any single customer.  The Electric Distribution reportable segment includes the results of NSTAR Electric's solar power facilities. Eversource's reportable segments are determined based upon the level at which Eversource's chief operating decision maker assesses performance and makes decisions about the allocation of company resources.  

The remainder of Eversource's operations is presented as Other in the tables below and primarily consists of 1) the equity in earnings of Eversource parent from its subsidiaries and intercompany interest income, both of which are eliminated in consolidation, and interest expense related to the debt of Eversource parent, 2) the revenues and expenses of Eversource Service, most of which are eliminated in consolidation, 3) the operations of CYAPC and YAEC, 4) the results of other unregulated subsidiaries, which are not part of its core business, and 5) Eversource parent's equity ownership interests that are not consolidated, which primarily include the offshore wind business, a natural gas pipeline owned by Enbridge, Inc., and a renewable energy investment fund.

In the ordinary course of business, Yankee Gas, NSTAR Gas and EGMA purchase natural gas transmission services from the Enbridge, Inc. natural gas pipeline project described above. These affiliate transaction costs total $77.7 million annually and are classified as Purchased Power, 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.  

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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 Year Ended December 31, 2022
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	9,405.3	$	2,215.6	$	1,808.7	$	222.5	$	1,435.5	$	(2,798.3)	$	12,289.3
Depreciation and Amortization	(970.4)		(157.6)		(337.4)		(50.9)		(132.6)		5.8		(1,643.1)
Other Operating Expenses	(7,663.7)		(1,727.0)		(548.4)		(111.8)		(1,189.1)		2,792.0		(8,448.0)
Operating Income	771.2		331.0		922.9		59.8		113.8		(0.5)		2,198.2
Interest Expense	(253.1)		(71.4)		(145.5)		(34.7)		(247.8)		74.2		(678.3)
Interest Income	45.1		10.2		0.5		—		66.3		(71.6)		50.5
Other Income, Net	180.4		33.6		37.9		8.5		1,600.8		(1,565.6)		295.6
Income Tax (Expense)/Benefit	(146.2)		(69.2)		(216.3)		3.2		(25.1)		—		(453.6)
Net Income	597.4		234.2		599.5		36.8		1,508.0		(1,563.5)		1,412.4
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	592.8	$	234.2	$	596.6	$	36.8	$	1,508.0	$	(1,563.5)	$	1,404.9
Total Assets (as of)	$	27,365.0	$	8,084.9	$	13,369.5	$	2,783.8	$	26,365.2	$	(24,737.5)	$	53,230.9
Cash Flows Used for Investments in Plant	$	1,172.6	$	710.3	$	1,144.0	$	154.4	$	260.6	$	—	$	3,441.9

	For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	7,423.6	$	1,789.6	$	1,634.6	$	211.3	$	1,354.0	$	(2,550.0)	$	9,863.1
Depreciation and Amortization	(737.8)		(142.3)		(300.3)		(46.1)		(113.1)		4.6		(1,335.0)
Other Operating Expenses	(5,970.0)		(1,345.4)		(496.2)		(101.4)		(1,170.4)		2,548.6		(6,534.8)
Operating Income	715.8		301.9		838.1		63.8		70.5		3.2		1,993.3
Interest Expense	(236.4)		(58.6)		(133.2)		(32.0)		(168.8)		46.6		(582.4)
Interest Income	20.7		4.5		2.2		—		46.0		(47.8)		25.6
Other Income, Net	78.1		17.9		19.8		3.3		1,363.9		(1,347.3)		135.7
Income Tax (Expense)/Benefit	(103.5)		(60.9)		(179.4)		1.7		(2.1)		—		(344.2)
Net Income	474.7		204.8		547.5		36.8		1,309.5		(1,345.3)		1,228.0
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	470.1	$	204.8	$	544.6	$	36.8	$	1,309.5	$	(1,345.3)	$	1,220.5
Total Assets (as of)	$	25,411.2	$	7,215.9	$	12,377.8	$	2,551.1	$	22,674.7	$	(21,738.6)	$	48,492.1
Cash Flows Used for Investments in Plant	$	1,053.3	$	721.1	$	1,024.1	$	137.2	$	239.4	$	—	$	3,175.1

	For the Year Ended December 31, 2020
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	7,132.3	$	1,208.7	$	1,536.1	$	215.4	$	1,235.9	$	(2,424.0)	$	8,904.4
Depreciation and Amortization	(657.0)		(87.9)		(278.1)		(44.2)		(93.5)		1.6		(1,159.1)
Other Operating Expenses	(5,642.3)		(913.8)		(470.0)		(86.6)		(1,071.9)		2,428.0		(5,756.6)
Operating Income	833.0		207.0		788.0		84.6		70.5		5.6		1,988.7
Interest Expense	(216.0)		(40.0)		(126.8)		(32.9)		(161.0)		38.3		(538.4)
Interest Income	3.2		0.9		4.7		—		37.8		(41.8)		4.8
Other Income, Net	58.0		3.1		23.3		2.0		1,382.9		(1,365.5)		103.8
Income Tax (Expense)/Benefit	(129.6)		(36.9)		(183.8)		(12.5)		16.6		—		(346.2)
Net Income	548.6		134.1		505.4		41.2		1,346.8		(1,363.4)		1,212.7
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	544.0	$	134.1	$	502.5	$	41.2	$	1,346.8	$	(1,363.4)	$	1,205.2
Cash Flows Used for Investments in Plant	$	1,079.0	$	494.4	$	1,004.6	$	118.8	$	246.2	$	—	$	2,943.0

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24.     ACQUISITION OF ASSETS OF COLUMBIA GAS OF MASSACHUSETTS

On October 9, 2020, Eversource acquired certain assets and liabilities that comprised the NiSource Inc. (NiSource) natural gas distribution business in Massachusetts, which was previously doing business as Columbia Gas of Massachusetts (CMA), pursuant to an asset purchase agreement (the Agreement) entered into on February 26, 2020 between Eversource and NiSource. The cash purchase price was $1.1 billion, plus a working capital amount of $68.6 million, as finalized in 2021. Eversource financed the acquisition through a combination of debt and equity issuances in a ratio that was consistent with its consolidated capital structure.

Pro Forma Financial Information: The following unaudited pro forma financial information reflects the pro forma combined results of operations of Eversource and the CMA business acquired and reflects the amortization of purchase price adjustments assuming the acquisition had taken place on January 1, 2019. The unaudited pro forma financial information has been presented for illustrative purposes only and is not necessarily indicative of the consolidated results of operations that would have been achieved or the future consolidated results of operations of Eversource. Pro forma net income excludes the impact of assets and liabilities not assumed by Eversource and non-recurring costs associated with the transaction.

(Pro forma amounts in millions, except share amounts)	For the Year Ended December 31, 2020
Operating Revenues	$	9,273
Net Income Attributable to Common Shareholders	1,265
Basic EPS	3.73
Diluted EPS	3.72

Revenues and Net Income: The impact of CMA on Eversource's accompanying consolidated statement of income included operating revenues of $154.8 million and net income attributable to common shareholders of $13.9 million for the year ended December 31, 2020.

Transactions recognized separately from the business combination: Eversource entered into Transition Services Agreements (TSAs) with NiSource, under which NiSource provided certain administrative functions. The TSAs were completed in 2022. Eversource recorded $7.9 million and $21.4 million in Operating Expenses on the statements of income related to TSA costs for the years ended December 31, 2022 and 2021, respectively, and $15.9 million of TSA and pre-TSA costs in Operating Expenses in 2020. In addition, Eversource recorded $2.0 million in Energy Efficiency expense related to the implementation of new energy efficiency programs as specified in a DPU-approved rate settlement agreement in the fourth quarter of 2020.

25.    GOODWILL

In a business combination, the excess of the purchase price over the estimated fair values of the assets acquired and liabilities assumed

is recognized as goodwill. The following table presents Eversource’s goodwill by reportable segment:

(Millions of Dollars)	Electric Distribution		Electric Transmission		Natural Gas Distribution		Water Distribution		Total
Balance as of January 1, 2021	$	2,543.6	$	576.8	$	441.4	$	884.2	$	4,446.0
CMA Measurement Period Adjustments	—		—		9.6		—		9.6
Acquisition of NESC	—		—		—		21.7		21.7
Balance as of December 31, 2021	$	2,543.6	$	576.8	$	451.0	$	905.9	$	4,477.3
NESC Measurement Period Adjustments	—		—		—		0.5		0.5
Acquisition of TWC	—		—		—		44.8		44.8
Balance as of December 31, 2022	$	2,543.6	$	576.8	$	451.0	$	951.2	$	4,522.6

Eversource completed the acquisition of TWC on October 3, 2022, resulting in the addition of $44.8 million of goodwill, all of which was allocated to the Water Distribution reporting unit. Eversource completed the acquisition of NESC on December 1, 2021, resulting in the addition of $22.2 million of goodwill, which included measurement period increases in 2022 totaling $0.5 million. The goodwill was allocated to the Water Distribution reporting unit. Eversource completed the CMA asset acquisition on October 9, 2020, resulting in the addition of $51.9 million of goodwill, which included measurement period adjustments in 2021 resulting in an additional $9.6 million of goodwill. The goodwill was allocated to the Natural Gas Distribution reporting unit. For further information on the acquisitions of TWC and NESC, see Note 18, “Common Shares,” to the financial statements.

Goodwill is evaluated for impairment at least annually and more frequently if indicators of impairment arise. In accordance with the accounting standards, if the fair value of a reporting unit is less than its carrying value (including goodwill), the goodwill is tested for impairment. Goodwill is not subject to amortization, however is subject to a fair value based assessment for impairment at least annually and whenever facts or circumstances indicate that there may be an impairment.  A resulting write-down, if any, would be charged to Operating Expenses.   

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In assessing goodwill for impairment, an entity is permitted to first assess qualitatively whether it is more likely than not that goodwill impairment exists as of the annual impairment test date. A quantitative impairment test is required only if it is concluded that it is more likely than not that a reporting unit’s fair value is less than it’s carrying amount. The annual goodwill assessment included a qualitative evaluation of multiple factors that impact the fair value of the reporting units, including general, macroeconomic and market conditions, and entity-specific assumptions that affect the future cash flows of the reporting units. Key considerations include discount rates, utility sector market performance and merger transaction multiples, the Company's share price and credit ratings, analyst reports, financial performance, cost and risk factors, internal estimates and projections of future cash flows and net income, long-term strategy, the timing and outcome of rate cases, and recent regulatory and legislative proceedings.

Eversource's reporting units for the purpose of testing goodwill are Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution. These reporting units are consistent with the operating segments underlying the reportable segments identified in Note 23, "Segment Information," to the financial statements.

Eversource completed its annual goodwill impairment assessment for the Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution reporting units as of October 1, 2022 and determined that no impairment existed. There were no events subsequent to October 1, 2022 that indicated impairment of goodwill.

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Item 9.    Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

No events that would be described in response to this item have occurred with respect to Eversource, CL&P, NSTAR Electric or PSNH.

Item 9A.    Controls and Procedures

Management, on behalf of Eversource, CL&P, NSTAR Electric and PSNH, is responsible for the preparation, integrity, and fair presentation of the accompanying Financial Statements and other sections of this combined Annual Report on Form 10-K.  Eversource's internal controls over financial reporting were audited by Deloitte & Touche LLP.    

Management, on behalf of Eversource, CL&P, NSTAR Electric and PSNH, is responsible for establishing and maintaining adequate internal controls over financial reporting.  The internal control framework and processes have been designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP.  There are inherent limitations of internal controls over financial reporting that could allow material misstatements due to error or fraud to occur and not be prevented or detected on a timely basis by employees during the normal course of business.  Additionally, internal controls over financial reporting may become inadequate in the future due to changes in the business environment.  Under the supervision and with the participation of the principal executive officer and principal financial officer, an evaluation of the effectiveness of internal controls over financial reporting was conducted based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).  Based on this evaluation under the framework in COSO, management concluded that internal controls over financial reporting at Eversource, CL&P, NSTAR Electric and PSNH were effective as of December 31, 2022.

Management, on behalf of Eversource, CL&P, NSTAR Electric and PSNH, evaluated the design and operation of the disclosure controls and procedures as of December 31, 2022 to determine whether they are effective in ensuring that the disclosure of required information is made timely and in accordance with the Securities Exchange Act of 1934 and the rules and regulations of the SEC.  This evaluation was made under management's supervision and with management's participation, including the principal executive officer and principal financial officer as of the end of the period covered by this Annual Report on Form 10-K.  There are inherent limitations of disclosure controls and procedures, including the possibility of human error and the circumventing or overriding of the controls and procedures.  Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control objectives.  The principal executive officer and principal financial officer have concluded, based on their review, that the disclosure controls and procedures of Eversource, CL&P, NSTAR Electric and PSNH are effective to ensure that information required to be disclosed by us in reports filed under the Securities Exchange Act of 1934 (i) is recorded, processed, summarized, and reported within the time periods specified in SEC rules and regulations and (ii) is accumulated and communicated to management, including the principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosures.

There have been no changes in internal controls over financial reporting for Eversource, CL&P, NSTAR Electric and PSNH during the quarter ended December 31, 2022 that have materially affected, or are reasonably likely to materially affect, internal controls over financial reporting.

Item 9B.    Other Information

No information is required to be disclosed under this item as of December 31, 2022, as this information has been previously disclosed in applicable reports on Form 8-K during the fourth quarter of 2022.

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PART III

Item 10.    Directors, Executive Officers and Corporate Governance

The information in Item 10 is provided as of February 15, 2023, except where otherwise indicated.

Certain information required by this Item 10 is omitted for NSTAR Electric and PSNH pursuant to Instruction I(2)(c) to Form 10-K, Omission of Information by Certain Wholly Owned Subsidiaries.

Eversource Energy

In addition to the information provided below concerning the executive officers of Eversource Energy, incorporated herein by reference is the information to be contained in the sections captioned “Election of Trustees,” “Governance of Eversource Energy” and the related subsections, “Selection of Trustees,” and “Delinquent Section 16(a) Reports” of Eversource Energy’s definitive proxy statement for solicitation of proxies, expected to be filed with the SEC on or about March 24, 2023.

Eversource Energy and CL&P

Ms. Conner and Messrs. Butler, Moreira and Schweiger, four of the seven CL&P Board of Directors are employees of Eversource Service. Messrs. Howard, McGrath and Nicholson were elected to the CL&P Board effective June 1, 2022 and are non-employee Directors of CL&P. Directors are elected annually to serve for one year until their successors are elected and qualified. CL&P is a wholly owned subsidiary of Eversource Energy.

Set forth below is certain information concerning CL&P’s directors as well as Eversource Energy’s and CL&P’s executive officers:

Name	Age	Title
Joseph R. Nolan, Jr. 1	59	Chairman of the Board, President, Chief Executive Officer and a Trustee of Eversource Energy
John M. Moreira	61	Executive Vice President, Chief Financial Officer and Treasurer of Eversource Energy and CL&P; Director of CL&P
Gregory B. Butler	65	Executive Vice President and General Counsel of Eversource Energy and CL&P; Director of CL&P
Christine M. Carmody 1	60	Executive Vice President-Human Resources and Information Technology of Eversource Energy
Penelope M. Conner	59	Executive Vice President-Customer Experience and Energy Strategy of Eversource Energy; Director of CL&P
Chandler J. Howard	71	Director of CL&P
James W. Hunt, III 1	51	Executive Vice President-Corporate Relations and Sustainability and Secretary of Eversource Energy
Patrick J. McGrath	50	Director of CL&P
Ian G. Nicholson	55	Director of CL&P
Werner J. Schweiger	63	Executive Vice President and Chief Operating Officer of Eversource Energy; Chairman, Chief Executive Officer and Director of CL&P
Stephen T. Sullivan	61	President and Chief Operating Officer of CL&P
Jay S. Buth	53	Vice President, Controller and Chief Accounting Officer of Eversource Energy and CL&P

1 Deemed an executive officer of CL&P pursuant to Rule 3b-7 under the Securities Exchange Act of 1934.

Joseph R. Nolan, Jr. Mr. Nolan has served as Chairman of the Board of Eversource Energy since January 1, 2023, and has served as President and Chief Executive Officer and a Trustee of Eversource Energy since 2021. Previously, Mr. Nolan served as Executive Vice President-Strategy, Customer and Corporate Relations of Eversource Energy from February 5, 2020 until May 5, 2021, and as Executive Vice President-Customer and Corporate Relations of Eversource Energy from August 8, 2016 to February 5, 2020. Based on his experience as described, Mr. Nolan has the skills and qualifications necessary to serve as a Trustee of Eversource Energy.

John M. Moreira. Mr. Moreira has served as Executive Vice President, Chief Financial Officer and Treasurer of Eversource Energy and CL&P since May 4, 2022. He previously served as Senior Vice President-Financial and Regulatory and Treasurer of Eversource Energy and CL&P from September 12, 2018 until May 4, 2022. Based on his experience as described, Mr. Moreira has the skills and qualifications necessary to serve as a Director of CL&P.

Gregory B. Butler. Mr. Butler has served as General Counsel of Eversource Energy since May 1, 2001, and of CL&P since March 9, 2006. He has served as Executive Vice President of Eversource Energy and CL&P since August 8, 2016. He has served as a Director of CL&P since April 22, 2009. Based on his experience as described, Mr. Butler has the skills and qualifications necessary to serve as a Director of CL&P.

Christine M. Carmody. Ms. Carmody has served as Executive Vice President-Human Resources and Information Technology of Eversource Energy since August 8, 2016. Previously, Ms. Carmody served as Senior Vice President-Human Resources of Eversource Energy from May 4, 2016 until August 8, 2016; and of Eversource Service from April 10, 2012 until August 8, 2016.

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Penelope M. Conner. Ms. Conner has served as Executive Vice President-Customer Experience and Energy Strategy of Eversource Energy since May 5, 2021. Previously, Ms. Conner served as Senior Vice President and Chief Customer Officer of Eversource Service from March 2, 2013 until May 5, 2021. Based on her experience as described, Ms. Conner has the skills and qualifications necessary to serve as a Director of CL&P.

Chandler J. Howard. Mr. Howard serves as a Director of Liberty Bank, a Connecticut based financial institution serving more than 200,000 consumers and businesses through 55 retail banking locations. From 2007 until his retirement in 2019, Mr. Chandler served as the President and Chief Executive Officer of Liberty Bank. Mr. Howard has significant experience in the regulated banking industry through positions of increasing responsibility at People’s United Bank, Bank of America, and Fleet Bank, culminating in a more than 35-year career at Liberty Bank. His career has provided him with a broad base of financial expertise, leadership and management skills, and community experience. Based on his experience as described, Mr. Howard has the skills and qualifications necessary to serve as a Director of CL&P.

James W. Hunt, III. Mr. Hunt has served as Executive Vice President-Corporate Relations and Sustainability of Eversource Energy since May 5, 2021, and as Secretary of Eversource Energy since July 9, 2021. Previously Mr. Hunt served as Senior Vice President-Communications, External Affairs and Sustainability of Eversource Service from December 17, 2019 until May 5, 2021 and as Senior Vice President-Regulatory Affairs and Chief Communications Officer of Eversource Service from October 3, 2016 until December 17, 2019.

Patrick J. McGrath. Mr. McGrath has been a Partner of the Connecticut law firm of Cicchetti, Tansley & McGrath LLP since 2005. Mr. McGrath has over twenty years of experience as an attorney representing clients including businesses, financial institutions and individuals in a broad range of transactional and administrative matters. He routinely provides advice to his clients to facilitate informed business decisions. Mr. McGrath also has significant experience serving on several non-profit boards. Based on his experience as described, Mr. McGrath has the skills and qualifications necessary to serve as a Director of CL&P.

Ian G. Nicholson. Mr. Nicholson is a retired Connecticut State Trooper. From 2011 to 2022, he served as a member of the Connecticut Governor’s Security Unit, and he served as a Supervisor from 2019 until his retirement in 2022. Previously, Mr. Nicholson served as the Resident State Trooper for Harwinton, Connecticut, where he developed an extensive network of experts and analysts and gained significant experience in investigative analysis with a specific focus on cybercrimes. Mr. Nicholson promotes cybersecurity best practices including training and awareness to recognize and respond to cyber threats. Based on his experience as described, Mr. Nicholson has the skills and qualifications necessary to serve as a Director of CL&P.

Werner J. Schweiger. Mr. Schweiger has served as Executive Vice President and Chief Operating Officer of Eversource Energy since September 2, 2014 and as Chief Executive Officer of CL&P since August 11, 2014. Mr. Schweiger has served as a Director of CL&P since May 28, 2013 and as Chairman of the Board of CL&P since May 27, 2022. Based on his experience as described, Mr. Schweiger has the skills and qualifications necessary to serve as a Director of CL&P.

Stephen T. Sullivan. Mr. Sullivan has served as President and Chief Operating Officer of CL&P since December 5, 2021. Previously Mr. Sullivan served as Vice President-Project Management and Construction of Eversource Service from March 16, 2021 until December 5, 2021, and as Vice President-Project Management of Eversource Service from October 25, 2015 until March 16, 2021.

Jay S. Buth. Mr. Buth has served as Vice President, Controller and Chief Accounting Officer of Eversource Energy and CL&P since April 10, 2012.

There are no family relationships between any director or executive officer and any other trustee, director or executive officer of Eversource Energy or CL&P and none of the above executive officers or directors serves as an executive officer or director pursuant to any agreement or understanding with any other person.  Our executive officers hold the offices set forth opposite their names until the next annual meeting of the Board of Trustees, in the case of Eversource Energy, and the Board of Directors, in the case of CL&P, and until their successors have been elected and qualified.

CL&P obtains audit services from the independent registered public accounting firm engaged by the Audit Committee of Eversource Energy’s Board of Trustees.  CL&P does not have its own audit committee or, accordingly, an audit committee financial expert.  CL&P relies on Eversource Energy’s audit committee and the audit committee financial expert.

CODE OF ETHICS AND CODE OF BUSINESS CONDUCT

Each of Eversource Energy, CL&P, NSTAR Electric, and PSNH has adopted a Code of Ethics for Senior Financial Officers (Chief Executive Officer, Chief Financial Officer and Controller) and the Code of Business Conduct, which are applicable to all Trustees, directors, officers, employees, contractors and agents of Eversource Energy, CL&P, NSTAR Electric and PSNH.  The Code of Ethics and the Code of Business Conduct have both been posted on the Eversource Energy web site and are available at www.eversource.com/Content/general/about/investors/corporate-governance on the Internet.  Any amendments to or waivers from the Code of Ethics and Code of Business Conduct for executive officers, directors or Trustees will be posted on the website.  Any such amendment or waiver would require the prior consent of the Board of Trustees or an applicable committee thereof.

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Printed copies of the Code of Ethics and the Code of Business Conduct are also available to any shareholder without charge upon written request mailed to:

James W. Hunt, III

Secretary

Eversource Energy

800 Boylston Street, 17th Floor

Boston, Massachusetts 02199-7050

Item 11. Executive Compensation

Eversource Energy

The information required by this Item 11 for Eversource Energy is incorporated herein by reference to certain information contained in Eversource Energy's definitive proxy statement for solicitation of proxies, which is expected to be filed with the SEC on or about March 24, 2023, under the sections captioned “Compensation Discussion and Analysis,” plus related subsections, and “Compensation Committee Report,” plus related subsections following such Report.

NSTAR ELECTRIC and PSNH

Certain information required by this Item 11 has been omitted for NSTAR Electric and PSNH pursuant to Instruction I(2)(c) to Form 10-K, Omission of Information by Certain Wholly-Owned Subsidiaries.

CL&P

The information in this Item 11 relates solely to CL&P.

COMPENSATION DISCUSSION AND ANALYSIS

CL&P is a wholly-owned subsidiary of Eversource Energy. Its board of directors consists of four executive officers of Eversource Energy system companies and three independent, non-employee directors who were elected to the board of directors on June 1, 2022 in accordance with the previously noted settlement agreement with PURA. CL&P does not have a compensation committee, and the Compensation Committee of Eversource Energy's Board of Trustees determines compensation for the executive officers of CL&P, including their salaries, annual incentive awards and long-term incentive awards. All of CL&P's “Named Executive Officers,” as defined below, also serve or served as officers of Eversource Energy and one or more other subsidiaries of Eversource Energy. Compensation set by the Compensation Committee of Eversource Energy (the “Committee”) and set forth herein is for services rendered to Eversource Energy and its subsidiaries by such officers in all capacities.

This Compensation Discussion and Analysis (CD&A) provides information about Eversource Energy’s compensation principles, objectives, plans, policies and actions for its Named Executive Officers. The discussion describes the specific components used in its compensation programs and approach to executive compensation, how Eversource Energy measures performance, and how Eversource Energy’s compensation principles were applied to compensation awards and decisions that were made by the Compensation Committee for the Named Executive Officers, as presented in the tables and narratives that follow. While this discussion focuses primarily on 2022 information, it also addresses decisions that were made in prior periods to the extent that these decisions are relevant to the full understanding of Eversource Energy’s compensation programs and the decisions that were made regarding 2022 performance. The CD&A also contains an assessment of performance measured against established 2022 goals and additional accomplishments, the compensation awards made by the Compensation Committee, and other information relating to Eversource Energy’s compensation programs, including:

=	Summary of 2022 Accomplishments	=	2022 Annual Incentive Program Assessment
=	Pay for Performance Philosophy	=	Long-Term Incentive Program
=	Executive Compensation Governance	=	Clawback, No Hedging and No Pledging Policies
=	Named Executive Officers	=	Share Ownership Guidelines and Retention Requirements
=	Overview of the Compensation Program	=	Other Benefits
=	Market Analysis	=	Contractual Agreements
=	Mix of Compensation Elements	=	Tax and Accounting Considerations
=	Results of 2022 Say on Pay Vote	=	Equity Grant Practices
=	Elements of 2022 Compensation	=	Compensation Committee Report
=	Risk Analysis of Executive Compensation Program

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Summary of 2022 Accomplishments

2022 Financial and Operational Accomplishments

In 2022, Eversource Energy continued to outperform its peers in most financial metrics, demonstrate our leadership in ESG, and achieve the operational goals as set by the Committee, while continuing to safeguard our employees and customers. The following is a summary of some of the most important accomplishments in 2022:

•FINANCIAL PERFORMANCE: 2022 GAAP earnings per share equaled $4.05 per share, and non-GAAP earnings per share equaled $4.09. Non-GAAP earnings excludes $5.0 million of certain charges described below and in Exhibit A.(1)

•DIVIDENDS PAID: The Board of Trustees increased the annual dividend rate by 5.8 percent for 2022 to $2.55 per share, which exceeded the median dividend growth rate of 4.5 percent for the utilities that constitute the Edison Electric Institute Index (EEI Utility Index).

•SHAREHOLDER RETURN: Eversource Energy’s Total Shareholder Return (TSR) in 2022 was -5.0 percent, compared to 1.2 percent for the EEI Index of 39 companies. While our performance in recent years has trailed the EEI Utility Index, Eversource has continued to outperform the EEI Utility Index over the last five- and 10-year periods. This long-term performance ranks Eversource among the top 15 companies in the Index. An investment of $1,000 in Eversource’s common shares for the 10-year period beginning January 1, 2013 was

(1)    Non-GAAP EPS presented in this proxy statement excludes $0.04 per share relating to (1) the Columbia Gas acquisition and related transition costs in 2022 (2) charges in 2022 related to the acquisition and transition of New England Service Company and The Torrington Water Company and (3) charges in 2022 related to the strategic review of offshore wind. Eversource Energy uses this non-GAAP financial measure to more fully compare and explain 2022 earnings results without including the impact of these costs. Due to the effect of such costs on net income attributable to common shareholders, management believes that the non-GAAP presentation is a more meaningful representation of Eversource Energy’s financial performance and provides additional information to readers in analyzing historical and future performance of the business. Non-GAAP financial measures should not be considered as alternatives to Eversource Energy’s consolidated net income attributable to common shareholders. For further information, see Exhibit A to this Item 11.

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worth $2,925 on December 31, 2022, representing approximately a 193% total return. The following chart represents the comparative total shareholder returns for the periods ended December 31, 2022:

•STRATEGIC INITIATIVES AND REGULATORY OUTCOMES: Eversource successfully advanced several strategic initiatives and produced positive regulatory outcomes during 2022. Eversource made substantial progress advancing the offshore wind strategic review by launching the process with potential buyers, with an announcement anticipated in the second quarter of 2023. The Eversource Gas Company of Massachusetts’ integration and transition that followed the Columbia Gas asset purchase was completed ahead of schedule and below budget, exiting the 115 transition service functions. In October, our Aquarion Water subsidiary successfully completed the purchase of The Torrington Water Company, adding about 10,200 customers, and in November executed a purchase and sale agreement to acquire the Pinehills Water Company, which will add about 2,700 customers upon closing, advancing our water customer growth initiative. NSTAR Electric’s rate case received a favorable order, including a rate increase of $64 million, a 9.8% return on equity, and approval of its Advanced Metering Infrastructure project with timely cost recovery, as well as a new mechanism for better timely recovery of all other capital investments. NSTAR Electric filed with the Massachusetts Department of Public Utilities (MA DPU) a creative solution that allocates cost between Transmission, Distribution and Solar Developers needed to allow Renewable Distributed Energy Resources in Massachusetts to connect to the grid. The first of six projects was approved by the MA DPU in December and Eversource expects the remaining five projects to be approved in 2023. Lastly, in Massachusetts, the MA DPU issued an order supporting Eversource’s position that recent increases in property tax expense should be treated as "exogenous," allowing for full recovery. The Federal Energy Regulatory Commission approved an innovative, cost-effective transmission support agreement between Eversource and the offshore wind project Park City Wind, enabling Eversource to integrate a necessary reliability project with that offshore wind interconnection investment, resulting in savings to customers. In New Hampshire, Eversource was successful with efforts to have the New Hampshire Public Utilities Commission (NHPUC) reinstate the Energy Efficiency Customer Program and also approved a $9 million step base rate increase. After two years of negotiations and regulatory processes, Eversource also received initial approval from the New Hampshire Public Utilities Commission allowing for the acquisition of the distribution pole plant owned by Consolidated Communications. Eversource has implemented several emergency response enhancements, including the roll out of new outage management and community portal systems, which were well received in Connecticut, Massachusetts, and New Hampshire. The Connecticut line worker pipeline program also received great feedback, as well as our support of the Connecticut Governor and Attorney General in helping customers with the recent extraordinary energy supply price increases. The positive relationships Eversource continues to have with its unions supported many of these successful initiatives.

•RELIABILITY PERFORMANCE: Electric System Reliability, measured by months between interruptions, was top decile for the industry in 2022; customer power interruptions were on average 19.5 months apart, a performance that is top decile among our peers.

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Eversource’s recent Provincetown, Massachusetts battery storage project enables it to now help prevent outages which would otherwise affect approximately 11,000 customers.

•RESTORATION PERFORMANCE: The average system outage duration was 65.2 minutes, also top quartile in the utility industry for the fastest restoration time.

•SAFETY: Eversource’s safety performance was 1.0, measured by days away, restricted or transferred (DART) per 100 workers, which continues to improve over 2021, 2020 and 2019 performance. In 2022, Eversource used the DART-OSHA method of measurement for both the goal and 2022 results; 2019-2021 results shown in the graph below were converted to the DART-OSHA method. The strong partnerships that have been developed between Eversource management and the union leadership continue to assist us in both helping to safeguard our employees and in advancing our business initiatives.

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•GAS EMERGENCY RESPONSE: On-time response to gas customer emergency calls was 97.8 percent, which continues to exceed mandated emergency response requirements.

•ENHANCE THE CUSTOMER EXPERIENCE: Significant success has been achieved enhancing Eversource’s Customer Experience with go-live transition of Eversource Gas Company of Massachusetts' Customer Information System (CIS) and new SCADA system with no system interruptions, while delivering exceptional employee and customer experience. The next phase of the CIS/OMNI implementation impacting other Massachusetts operations has been launched. Eversource’s Advanced Metering Infrastructure Implementation Project was approved by the MA DPU in December. The new Outage Management System and Analytics Platform went live in 2022 along with a Storm Restoration Dashboard for storm events incorporating input from town and state stakeholders, all of which enhance Emergency Response capability and communication with customers, including improvements to the customer outage reporting function on Eversource’s web page. Additional technologies were implemented to reduce cyber threats and Eversource enhanced tools that increase customer password security standards. Fee free credit card transactions were also approved by the MA DPU for all electric and natural gas customers.

•CLEAN ENERGY EXECUTION: Eversource made significant progress to advance the siting of all three of its offshore wind projects (South Fork, Sunrise and Revolution Wind) at the federal and state levels, including achieving key permitting milestones and the installation of a critical duct bank system for the South Fork Wind Project. Eversource continues to advance the development of its electric vehicle infrastructure in both Connecticut and Massachusetts, successfully executed its first Massachusetts Grid Modernization plan, and submitted its next round of plan investments for approval, including Advanced Metering Infrastructure. Eversource’s commitment to clean energy advanced with the completion of the Provincetown Battery Energy Storage system, as well as demonstrating industry leadership in the MA DPU’s Future of Gas Proceeding. Eversource also executed its $596 million annual energy efficiency program, received MA DPU approval for its $1 billion new energy efficiency three-year program, and made solid progress in the Geothermal Pilot Program launched in the city of Framingham, Massachusetts. Phase 1 of the new Massachusetts Solar Program was filed with the MA DPU, and the Department also issued a constructive order on the next Grid Modernization phase. Eversource announced its commitment to developing Science Based Emission Targets and continued to position its natural gas business for long term success in many areas, including stakeholder engagement, geothermal pilot deployment, advancing RNG/hydrogen supply options, and other methane emission reductions. Eversource also established an internal team to focus on obtaining federal funding for clean energy related investments in support of customers. During 2022, Eversource, once again, received the ENERGY STAR™ Partner of the Year Sustained Excellence Award from the Environmental Protection Agency and U.S. Department of Energy.

2022 Sustainability/ESG

•SUSTAINABILITY: In 2022, Eversource’s strong environmental, social and governance performance produced numerous national and local awards and recognition. These honors are a result of a deep commitment to corporate responsibility, evidenced by the high ratings Eversource continues to receive from leading sustainability raters. In 2022, Eversource achieved its target range of 85 percent to 97 percent compared to its peer group assessed by two leading sustainability rating firms, with a combined end of-year ranking of 89.5 percent. Eversource continues to engage with a strong cross-functional network throughout the company to advance its sustainability strategy and drive performance that addresses the evolving expectations of our shareholders, customers, employees, regulators and the communities Eversource serves.

Eversource continued to take steps to mitigate climate change impacts through leading clean energy initiatives and ambitious greenhouse gas emission (GHG) reduction targets. Since 2019, Eversource has been focused on the ambitious goal of achieving carbon neutrality in company operations by 2030. Eversource continues to progress toward this goal by working with all areas of the company to reduce Scope 1 and 2 GHG emissions to as close to zero as possible. For emissions that cannot be avoided, Eversource is preparing to invest in qualified offsets. Eversource reduced its carbon footprint by 13 percent from the 2018 base year through 2021 by executing its carbon reduction initiatives associated with fleet, electric line losses, SF6 gas used in electric switchgear, energy efficiency, and leak prone gas pipe replacements. Building on this strong foundation and looking beyond its own operational GHG emissions, Eversource committed to setting a science-based target, which will be worked on with the Science Based Target initiative, to validate as an acceptable emissions goal aiming to limit global warming to 1.5 degrees Celsius. This target will address GHG reductions related to procuring energy supply

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on behalf of customers, the largest source of indirect Scope 3 emissions. Eversource continues to support customers to reduce their impacts on the climate through solutions such as energy efficiency programs, providing access to more renewable energy options, and advancing electric vehicle infrastructures and energy storage capabilities.

To address physical and transitional impacts related to climate change and maintain resiliency across our system in the face of climate change, Eversource continued to pursue the following actions:

•Working with regulators to gain approval for new programs that will help improve system resiliency in response to climate change, including vegetation management, pole and wire strengthening, flood proofing, and other system hardening measures;

•Implementing a grid modernization plan that will enhance the electric distribution infrastructure to improve resiliency and reliability and facilitate integration of distributed energy resources and electric vehicle infrastructure;

•Focusing on improving the efficiency of electric and natural gas distribution systems and preparing for the opportunities that clean energy advancements create;

•Investigating emerging technologies such as energy storage and automation programs that improve reliability;

•Implementing programs to address risks that may impact water availability and water quality;

•Evaluating the natural gas system and exploring alternative, less carbon-intense technologies like renewable natural gas and geothermal systems; and

•Pursuing opportunities that meet evolving customer expectations, including investments in electric vehicle infrastructure and providing customers with ways to minimize their energy use.

•DIVERSITY: In 2022, Eversource sustained its successful drive to increase workforce diversity and build a talent pipeline. In 2022, 61.6 percent of external hires were women and/or people of color, and 45.1 percent of external hires and internal promotions into leadership roles were women and/or people of color. Eversource continued to support a multitude of programs and agencies that address racial and ethnic disparities in its customers’ communities and beyond. Eversource also remains committed to developing a workforce that fully reflects the diversity of the people and communities it serves. Eversource’s hiring and talent practices emphasize diversity, equity, and inclusion (DE&I), and Eversource encourages employees to embrace different people, perspectives, and experiences in the workplace and within our communities – regardless of their race, color, religion, national origin, ancestry, sex, gender identity, age, disability, marital status, sexual orientation, active military or veteran status.

Eversource is a signatory to the CEO Action for Inclusion Pledge to advance diversity, equity and inclusion in the workplace, as well as a member of the Paradigm for Parity coalition, committed to addressing gender parity. Eversource offered a variety of programs, events, activities and discussions in 2022 focused on diversity, equity and inclusion, to provide employees with education and experiences to further emphasize messages of racial and social justice. Eversource held listening sessions with our business resource group leaders, who provided valuable input to address concerns during an ever changing and challenging year. Eversource’s Racial Equity Task Force maintained its focus on increasing racial equity and social justice through the lens of talent management, inclusion, and support for our diverse communities, including increasing business with diverse suppliers. Eversource held a highly-attended Day of Understanding virtual event to celebrate Juneteenth and followed up with discussions in business groups. Eversource continued these conversations with quarterly discussions hosted by its senior leaders, all focused on advancing our DE&I goals.

In addition, Eversource hosted monthly conversations in our Diversity and Inclusion multicultural book club and held signature learning events to celebrate Black History Month, Hispanic Heritage Month, and Asian American Month, focusing on the history, contributions, and current challenges of each group. Eversource also continued its webinar series on employee resilience and self-care. An example of Eversource’s commitment to promote equity and diversity in its communities is its investment in Girls With Impact, a business and leadership program that funds scholarships for under-resourced young women in Connecticut and Massachusetts. The investment is valued at nearly $300,000 and will fund approximately 300 scholarships. In response to the continuing calls for racial, social and environmental justice, Eversource’s Vice President of Corporate Citizenship, Equity, and Environmental Justice continued to lead a 15-member cross-functional pro-equity advisory team tasked with developing and implementing a strategy, guidelines, leadership toolkits, training materials and decision frameworks to promote equity in siting, customer-facing projects, procurement and philanthropy. This group developed and began to roll out justice and equity training to all Eversource employees in 2022. Eversource also developed a full 2021 DE&I Report, which detailed its many DE&I initiatives, programs, goals, successes, challenges and progress to date that was released in 2022. To further Eversource’s commitment to transparency, the report included our 2021 EEO-1 data.

•EMPLOYEES: Eversource recognizes that its employees are its most valuable asset. Eversource has developed strategic workplans as part of the annual business and workforce planning process to address immediate and long-range needs to ensure that it acquires, develops, and retains excellent talent. Virtual learning and development opportunities were provided in 2022 to employees, including the launch of a career management series and a new hire networking series with executive overviews. Interactive engagement and support tools were leveraged to promote remote worker effectiveness supporting the workforce with business, leadership, and technical knowledge. Employee development programs were aligned to the strategic workforce plan to support succession within all levels of the organization. Programs like the Growth Opportunities for Leadership Development Program provide development for recent college graduates and were expanded to include employees new to the utility industry. The Transmission Training, Engineering Development, and Transmission Cohort programs promoted educational and professional development opportunities for recent college graduates. Tuition assistance programs, paid internships, co-ops, and other pipeline development programs continued to ensure progress in future workforce technical skills and competencies. Targeted training, development and educational opportunities were offered to high potential employees to ensure their continued growth and development as future leaders. Thought provoking stretch assignments, high impact cross-functional team memberships, senior management interaction and exposure, targeted coaching and feedback, and diverse learning experiences that promote interdependent thinking and embrace alternative perspectives, while building teamwork and collaboration, represent core components of the key talent development program.

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Additionally, Eversource leveraged educational partnerships within the diverse communities it serves in critical trade and technical areas and has developed proactive sourcing strategies to attract experienced workers in highly technical roles in areas like engineering, electric and gas operations, and energy efficiency. As part of this process, Eversource added new college partnerships to increase its pipelines for diverse talent. Eversource also provides employees with fair pay, comprehensive benefits, and a variety of field and classroom training opportunities throughout their careers to support their ongoing success on the job.

The success of these programs, policies and opportunities is evidenced by Eversource’s most current comprehensive employee survey, which saw strong participation of 70 percent of the employee population and a high level of engagement, with an eight-point improvement in overall favorability.

•AWARDS: Eversource continued to receive numerous national awards in 2022 recognizing it as a leader and catalyst in the areas of sustainability and ESG.

◦Newsweek magazine ranked Eversource as the #1 energy company in their 2023 list of the Most Responsible Companies. This listing determines the most responsible companies of 2022 based on their corporate social sustainability performance and reputation.

◦Eversource was again ranked in the top 100 of America’s Most Just Companies for 2022 by Forbes/JUST Capital in partnership with CNBC. The listing recognizes corporate social responsibility and commitment to local communities and celebrates public companies for their positive impact and leadership on priorities such as ethical leadership, environmental impact, customer treatment, shareholder return, fair pay and benefits, and equal opportunity.

◦As You Sow named Eversource as a Top 10 Company on both their Racial Justice and DE&I scorecards.

◦Eversource was again selected to be included in the Bloomberg Gender-Equality Index, which recognizes companies that have shown their commitment to advancing women’s equality in the workplace and transparency in gender reporting.

◦Eversource was recognized again by the U.S. Department of Labor as a HIRE Vets Medallion Award recipient for our commitment to recruiting, employing, and retaining veterans.

◦Eversource was recognized as one of America’s “best employers for diversity” by Forbes magazine, which surveyed over 50,000 U.S. employees regarding age, gender, ethnicity, LGBTQA and diversity in their current workplace.

◦Eversource was recognized as a finalist for the Healthiest Employer Program for its commitment to workplace wellness and exceptional health benefits.

◦Eversource was again selected as a “most honored” company by Institutional Investor magazine for industry leading ESG, investor relations and multiple other categories as voted by institutional investors.

◦Eversource was included in Barron’s 2022 Most Sustainable Companies list. Barron’s based its list on performance indicators that address environmental, social and governance matters.

Achievement of the 2022 performance goals, additional accomplishments and the Compensation Committee’s assessment of Eversource and executive performance are more fully described in the section below titled “2022 Annual Incentive Program Assessment.” Specific decisions regarding executive compensation based upon the Committee’s assessment of company and executive performance and market data are also described below.

Pay for Performance Philosophy

The Compensation Committee links the compensation of the executive officers, including the Named Executive Officers, to performance that will ultimately benefit customers, employees, shareholders and communities served. Eversource’s compensation program is intended to attract and retain the best executive talent in the industry, motivate our executives to meet or exceed specific stretch financial and operational goals each year, and compensate our executives in a manner that aligns compensation directly with performance. Eversource strives to provide executives with base salary, performance-based annual incentive compensation, and performance-based long-term incentive compensation opportunities that are competitive with market practices and that reward excellent performance. Additional Pay for Performance information is set forth in this Item 11.

Executive Compensation Governance

•What Eversource DOES:

ü	Focus on Pay for Performance
ü	Maintain share ownership and holding guidelines
ü	Utilize balanced incentive metrics including both absolute and relative measures
ü	Deliver the majority of incentive compensation opportunity in long-term equity
ü	Maintain double-trigger change in control vesting provisions
ü	Hold shareholder engagement meetings throughout the year between management and shareholders that discuss compensation governance financial performance, ESG, climate change and sustainability, and overall corporate governance
ü	Maintain a broad financial and personal misconduct clawback policy relating to incentive compensation
ü	Tie 75 percent of long-term incentive compensation to performance and grant 100 percent of long-term incentive compensation in equity
ü	Engage an independent compensation consultant
ü	Hold an annual Say-on-Pay vote
ü	Impose payout limitations on incentive awards
ü	Maintain limited executive and Trustee trading window

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What Eversource DOESN’T do:

û	Include tax gross ups in any new or materially amended executive compensation agreements
û	Allow hedging, pledging or similar transactions by executives and Trustees
û	Provide for liberal share recycling within long-term compensation grants
û	Pay dividends on equity awards before vesting
û	Allow for discounts or repricing of options or stock appreciation rights
û	Grant change in control agreements (since 2010)

Named Executive Officers

The executive officers of CL&P listed in the Summary Compensation Table and whose compensation is discussed in this CD&A are referred to as the “Named Executive Officers” under SEC regulations. For 2022, CL&P’s Named Executive Officers (NEOs) were:

•Werner J. Schweiger, Executive Vice President and Chief Operating Officer of Eversource Energy, and Chairman of the Board and Chief Executive Officer of CL&P

•John M. Moreira, Executive Vice President, Chief Financial Officer and Treasurer of Eversource Energy and CL&P

•Gregory B. Butler, Executive Vice President and General Counsel of Eversource Energy and CL&P

•Christine M. Carmody, Executive Vice President-Human Resources and Information Technology of Eversource Energy

•James W. Hunt, III, Executive Vice President-Corporate Relations and Sustainability and Secretary of Eversource Energy

•Joseph R. Nolan, Jr., Chairman of the Board, President and Chief Executive Officer of Eversource Energy and Former Chairman of the Board of CL&P

•Philip J. Lembo, Former Executive Vice President and Chief Financial Officer of Eversource Energy and CL&P

Overview of Our Compensation Program

The Role of the Compensation Committee. The Eversource Board of Trustees has delegated to the Compensation Committee overall responsibility for establishing the compensation program for those senior executive officers, who are referred to in this CD&A as “executives” and who are deemed to be “executive officers” under the SEC’s regulations that determine the persons whose compensation is subject to disclosure. In this role, the Committee sets compensation policy and compensation levels, reviews and approves performance goals and evaluates executive performance. Although this CD&A refers principally to compensation for the Named Executive Officers, the same compensation principles and practices apply to all vice presidents and above. The compensation of Eversource’s Chief Executive Officer and its Executive Chairman is subject to the further review and approval of all of the independent Eversource Trustees.

Elements of Compensation. Total direct compensation consists of three elements: base salary, annual cash incentive awards, and long-term equity-based incentive awards. Indirect compensation is provided through certain retirement, perquisite, severance, and health and welfare benefit programs.

Eversource’s Compensation Objectives. The objectives of Eversource’s compensation program are to attract and retain superior executive talent, motivate executives to achieve annual and long-term performance goals set each year, and provide total compensation opportunities that are competitive with market practices. With respect to incentive compensation, the Committee believes it is important to balance short-term goals, such as producing earnings, with longer-term goals, such as long-term value creation for shareholders, maintaining a strong balance sheet, and being a leader in clean energy and sustainability. The Committee also places great emphasis on operating performance, customer service, safety, sustainability and workforce diversity. Eversource’s compensation program utilizes performance-based incentive compensation to reward individual and corporate performance and to align the interests of executives with Eversource’s customers, employees, and shareholders. The Committee continually increases expectations to motivate executives and employees to achieve continuous improvement in carrying out their responsibilities to customers to deliver energy and water reliably, safely, mindful of the environment and employee well-being, and at a reasonable cost, while providing an above-average total return to Eversource shareholders.

Setting Compensation Levels. To ensure that Eversource achieves its goal of providing market-based total direct compensation levels to attract and retain top quality management, the Committee provides executives with target compensation opportunities approximately equal to median compensation levels for executive officers of companies in the utility industry comparable to Eversource in size. To achieve that goal, the Committee, and its independent compensation consultant work together to determine the market values of executive direct and indirect compensation elements by using competitive market compensation data.

The Committee reviews competitive compensation data obtained from utility and general industry surveys and a specific group of peer utility companies. Incumbent compensation levels may be set below the market median for those executives who are new to their roles, while long-tenured, high performing executives may be compensated above median. The review by Pay Governance performed in December 2022 indicated that Eversource’s aggregate executive compensation levels continue to be aligned with median market rates.

Role of the Compensation Consultant. The Committee has retained Pay Governance as its independent compensation consultant. Pay Governance reports directly to the Committee and does not provide any other services to Eversource. With the consent of the Committee, Pay Governance works cooperatively with Eversource management to develop analyses and proposals for presentation to the Committee. The

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Committee generally relies on Pay Governance for peer group market data and information as to market practices and trends to assess the competitiveness of the compensation that Eversource pays to its executives and to review the Committee’s proposed compensation decisions.

Pay Governance Independence. In February 2023, the Committee assessed the independence of Pay Governance pursuant to SEC and NYSE rules and concluded that it is independent and that no conflict of interest exists that would prevent Pay Governance from independently advising the Committee. In making this assessment, the Committee considered the independence factors enumerated in Rule 10C-1(b) under the Securities Exchange Act of 1934, as well as the written representations of Pay Governance that Pay Governance does not provide any other services to Eversource, the level of fees received from Eversource as a percentage of Pay Governance’s total revenues, the policies and procedures employed by Pay Governance to prevent conflicts of interest, and whether the individual Pay Governance advisers with whom the Committee consulted own any Eversource common shares or have any business or personal relationships with members of the Committee or Eversource executives.

Role of Management. Management’s roles, and specifically the roles of Eversource’s Chief Executive Officer and the Executive Vice President-Human Resources and Information Technology, are to provide current compensation information to the compensation consultant and analyses and recommendations on executive compensation to the Committee based on the market value of the position, individual performance, experience and internal pay equity. Eversource’s Chief Executive Officer also provides recommendations on the compensation for the other Named Executive Officers other than the Executive Chairman. None of the executives makes recommendations that affect their individual compensation.

Market Analysis

The Compensation Committee seeks to provide executives with target compensation opportunities using a range that is approximately equal to the median compensation levels for executive officers of utility companies comparable to Eversource. Set forth below is a description of the sources of the compensation data used by the Committee when reviewing 2022 compensation:

•Competitive Compensation Survey Data. The Committee reviews compensation information obtained from surveys of diverse groups of utility and general industry companies that represent the market for executive officer talent. Utility industry data serve as the primary reference point for benchmarking officer compensation and are based on a defined peer set, as discussed below, while general industry data are derived from compensation consultant surveys and serve as a secondary reference point. General industry data are used for staff positions and are size adjusted to ensure a close correlation between the market data and Eversource’s scope of operations. The Committee references this information, which it obtains from Pay Governance, to evaluate and determine base salaries and incentive opportunities.

•Peer Group Data. In support of our executive pay decisions, the Committee consulted with Pay Governance, which provided the Committee with a competitive assessment analysis of Eversource’s executive compensation levels as compared to the 18 peer group companies listed in the table below. This peer group, which the Committee reviews annually, was chosen because these companies are similar to Eversource Energy in terms of size, business model and long-term strategies.

Alliant Energy Corporation	Dominion Energy, Inc.	Pinnacle West Capital Corporation
Ameren Corporation	DTE Energy Company	PPL Corporation
American Electric Power Co., Inc.	Edison International	Public Service Enterprise Group, Inc.
CenterPoint Energy, Inc.	Entergy Corporation	Sempra Energy
CMS Energy Corp.	FirstEnergy Corp.	WEC Energy Group, Inc.
Consolidated Edison, Inc.	NiSource Inc.	Xcel Energy Inc.

The Committee adjusts the target percentages of annual and long-term incentives based on the survey data and recommendations from Eversource’s Chief Executive Officer, after discussion with the compensation consultant, to ensure that they are approximately equal to competitive median levels.

The Committee periodically reviews the general market for supplemental benefits and perquisites using utility and general industry survey data, including data obtained from companies in the peer group.

Mix of Compensation Elements

Eversource targets the mix of compensation for its Chief Executive Officer and the other Named Executive Officers so that the percentages of each compensation element are approximately equal to the competitive median market mix. The mix is heavily weighted toward incentive compensation, and incentive compensation is heavily weighted toward performance-based long-term compensation. Since the most senior positions have the greatest responsibility for implementing long-term business plans and strategies, a greater proportion of total compensation is based on performance with a long-term focus.

The Committee determines the compensation for each executive based on the relative authority, duties and responsibilities of the executive. Eversource’s Chief Executive Officer’s responsibilities for the strategic direction and daily operations and management of Eversource are greater than the duties and responsibilities of our other executives. As a result, Eversource’s Chief Executive Officer’s compensation is higher than the compensation of our other executives. Assisted by the compensation consultant, the Committee regularly reviews market compensation data for executive officer positions similar to those held by our executives, including its Chief Executive Officer.

The following table sets forth the contribution to 2022 Total Direct Compensation (TDC) of each element of compensation at target, reflected as a percentage of TDC, for the Named Executive Officers. The percentages shown in this table are at target and therefore do not correspond to the amounts appearing in the Summary Compensation Table.

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	Percentage of TDC at Target
			Long-Term Incentives
	Base Salary	Annual Incentive (1)	Performance Shares (1)
Named Executive Officer				RSUs (2)	TDC
Werner J. Schweiger	25%	20%	41%	14%	100%
John M. Moreira	25%	20%	41%	14%	100%
Gregory B. Butler	28%	20%	39%	13%	100%
Christine M. Carmody	28%	20%	39%	13%	100%
James W. Hunt, III	33%	20%	35%	12%	100%
Joseph R. Nolan, Jr.	15%	17%	51%	17%	100%
Philip J. Lembo (3)	31%	0	52%	17%	100%
NEO average, excluding CEO	26.7%	16.2%	41.2%	14.3%	100%
NEO average, excluding CEO, Former Chairman and Former CFO	28.5%	20%	38.5%	13%	100%

(1)    The annual incentive compensation element and performance shares under the long-term incentive compensation element are performance-based.

(2)    Restricted Share Units (RSUs) vest in three equal annual installments over three years contingent upon continued employment.

(3)    Mr. Lembo retired during 2022 and was not eligible to receive an Annual Incentive award for 2022.

Results of Eversource's 2022 Say-on-Pay Vote. Eversource provides its shareholders with the required opportunity to cast the annual advisory vote on executive compensation (a Say-on-Pay proposal). At Eversource’s Annual Meeting of Shareholders held on May 4, 2022, 92.27 percent of the votes cast on the Say-on-Pay proposal were voted to approve the 2021 compensation of the Named Executive Officers, as described in Eversource’s 2022 proxy statement. Eversource’s Say-on-Pay results, along with those of utility and general industry peers, are reviewed by the Committee annually to help assess whether Eversource shareholders continue to deem its executives’ compensation to be appropriate. The Committee has and will continue to consider the outcome of Eversource’s Say-on-Pay votes when making future compensation decisions for the Named Executive Officers.

ELEMENTS OF 2022 COMPENSATION

Base Salary

Base salary is designed to attract and retain key executives by providing an element of total compensation at levels competitive with those of other executives employed by companies of similar size and complexity in the utility and general industries. In establishing base salary, the Compensation Committee relies on compensation data obtained from independent third-party surveys of companies and from an industry peer group to ensure that the compensation opportunities Eversource offers are capable of attracting and retaining executives with the experience and talent required to achieve our strategic objectives. Adjustments to base salaries are generally made on an annual basis except in instances of promotions.

When setting or adjusting base salaries, the Committee considers annual executive performance appraisals; market pay movement across industries (determined through market analysis); targeted market pay positioning for each executive; individual experience; strategic importance of a position; recommendations of Eversource’s Chief Executive Officer; and internal pay equity.

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Incentive Compensation

Annual incentive and long-term incentive compensation are provided under Eversource’s Incentive Plan, which was approved by shareholders in 2018. The annual incentive program provides cash compensation intended to reward performance under Eversource’s annual operating plan. The long-term stock-based incentive program is designed to reward demonstrated performance and leadership, motivate future performance, align the interests of the executives with those of shareholders, and retain the executives during the term of grants. The annual and long-term programs are designed to strike a balance between Eversource’s short- and long-term objectives so that the programs work in tandem.

In addition to the specific performance goals, the Committee assesses other factors, as well as the executives’ roles and individual performance, and then makes annual incentive program awards at the levels and amounts disclosed in this CD&A.

RISK ANALYSIS OF EXECUTIVE COMPENSATION PROGRAM

The overall compensation program includes a mix of compensation elements ranging from a fixed base salary that is not at risk to annual and long-term incentive compensation programs intended to motivate executives and other eligible employees to achieve individual and corporate performance goals that reflect an appropriate level of risk. The fundamental objective of the compensation program is to foster the continued growth and success of Eversource’s business. The design and implementation of the overall compensation program provide the Committee with opportunities throughout the year to assess risks within the compensation program that may have a material effect on Eversource and its shareholders.

The Compensation Committee assesses the risks associated with the executive compensation program on an ongoing basis by reviewing the various elements of incentive compensation. The annual incentive program is designed to ensure an appropriate balance between individual and corporate goals, which were deemed appropriate and supportive of Eversource’s annual business plan. Similarly, the long-term incentive program is designed to ensure that the performance metrics are properly weighted and supportive of Eversource’s strategy. The Committee reviewed the overall compensation program in the context of risks identified in the annual operating plan. The annual and long-term incentive programs were designed to include mechanisms to mitigate risk. These mechanisms include realistic goal setting and discretion with respect to actual payments, in addition to:

•A mix of annual and long-term performance awards to provide an appropriate balance of short- and long-term risk and reward horizon;

•A variety of performance metrics, including financial, operational, customer service, ESG, diversity, safety and strategic goals and initiatives for annual performance awards to avoid excessive focus on a single measure of performance;

•Metrics in Eversource’s long-term incentive compensation program that use earnings per share growth and relative total shareholder return, which are both robust measures of shareholder value and which reduce the risk that employees might be encouraged to pursue other objectives that increase risk or reduce financial performance;

•The provisions of Eversource’s annual and long-term incentive programs, which cap awards at 200 percent of target;

•Eversource’s expansive clawback provisions on incentive compensation, including clawback for material violations of the Eversource Code of Business Conduct; and

•Stock ownership requirements for all executives, including Eversource’s NEOs, and prohibitions on hedging, pledging and other derivative transactions related to Eversource common shares.

Based on these factors, the Compensation Committee and the Board of Trustees believe the overall compensation program risks are mitigated to reduce overall compensation risk.

2022 ANNUAL INCENTIVE PROGRAM ASSESSMENT

In early February of 2022, the Committee established the terms of the 2022 Annual Incentive Program. As part of the overall program, and after consulting with Pay Governance, the Committee set target award levels for each of Eversource’s Named Executive Officers that ranged from 70 percent to 125 percent of base salary.

At the February 2022 meeting, the Committee determined that for 2022 it would continue to base 70 percent of the annual incentive performance goals on Eversource’s overall financial performance and 30 percent of the annual performance goals on Eversource’s overall operational performance. The Committee also determined the specific goals that would be used to assess performance, with potential ratings on each goal ranging from zero percent to 200 percent of target. The Committee assigned weightings to each of the goals. For the financial component, the following goals were used: earnings per share, weighted at 60 percent, advancement of strategic growth initiatives and regulatory outcomes, weighted at 30 percent, and dividend growth, weighted at 10 percent. For the operational component, the Committee used the following goals: combined safety ratings, gas service response, diversity promotions and hires of leadership employee positions, and sustainability, customer and clean energy initiatives, weighted at 50 percent, service reliability weighted at 25 percent, and restoration of outages duration, weighted at 25 percent.

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In establishing the individual annual performance goals, the Committee sets stretch goals for both the financial and operational components. Many of the goals use performance ranges, as opposed to threshold or target ranges, whereby the lower end of the performance range does not represent average or less compared to industry peers, or other similar performance benchmarks, but requires performance that exceeds industry standards, peer performance and other benchmarks in order to be met, while achievement at the higher end of the range represents superior performance. Achieving performance of these stretch goals within the particular range will therefore justify an assessment beyond target.

2022 Performance Goals

At the December 2022 meeting of the Committee, Eversource’s management provided an initial review of its 2022 performance, followed in February 2023 by a full assessment of the performance goals, the additional accomplishments noted below under the caption “Additional Factors” and the overall performance of Eversource and its executives. In addition to these meetings, the Committee and the Eversource Board were provided updates during 2022 on corporate performance. At the February 1, 2023 meeting, the Committee determined, based on its assessment of the financial and operational performance goals and the other factors noted above, to set the level of achievement of combined financial and operational performance goals results at 164 percent, reflecting the strong performance of Eversource and its executive team in executing Eversource’s Operating Plan. In arriving at this determination, the Committee determined that the weighted financial performance goals result was 118 percent and the weighted operational performance goals result was 46 percent. Eversource’s Chief Executive Officer recommended to the Committee awards for its executives (other than himself) based on his assessment of each executive’s individual performance towards achievement of the performance goals and the additional accomplishments of Eversource, together with each executive’s contributions to the overall performance of Eversource. The actual awards determined by the Committee were also based on the same criteria.

Financial Performance Goals Assessment

•FINANCIAL PERFORMANCE: Eversource’s non-GAAP earnings per share in 2022 of $4.09, which excludes the adjustment to earnings as described in Exhibit A to this Item 11, increased by 6.0 percent when compared to non-GAAP adjusted earnings per share in 2021, and exceeded the established goal of $4.06. Eversource was able to achieve this goal through effective management of the 2022 Operating Plan on a day-by-day basis, including execution of its $3.8 billion utility capital plan, and by overcoming several challenges to plan achievement, including higher than plan interest costs due to the number and scale of federal interest rate increases; higher O&M expenses caused primarily by the significant number and severity of storm events; higher employee-related costs; higher COVID-related bad debt expense; an unplanned contribution to help customers in Connecticut with the high cost of energy; and the financial and operational impacts of supply chain challenges. Please see Exhibit A to this Item 11, which provides detailed information of GAAP and non-GAAP financial information and the Committee’s determination with respect to the earnings per share goal. The Committee determined the earnings per share goal to have attained a 170 percent performance result.

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•DIVIDEND GROWTH: Eversource increased its annual dividend to $2.55 per share, a 5.8 percent increase from the prior year, significantly above the utility industry’s median dividend growth of 4.5 percent for the EEI Utility Index. The Committee determined this goal to have attained a 160 percent performance result.

•STRATEGIC INITIATIVES AND REGULATORY OUTCOMES: Eversource successfully advanced several strategic initiatives and produced positive regulatory outcomes during 2022. Eversource made substantial progress advancing the offshore wind strategic review announced in 2022 by launching the process with potential buyers, with an announcement anticipated in the second quarter of 2023. The Eversource Gas Company of Massachusetts integration and transition that followed the Columbia Gas asset purchase was completed ahead of schedule and below budget, exiting the 115 transition service functions. In October, Eversource’s Aquarion Water subsidiary successfully completed the purchase of The Torrington Water Company, adding about 10,200 customers, and in November executed a purchase and sale agreement to acquire the Pinehills Water Company, which will add about 2,700 customers upon closing, advancing Eversource’s water customer growth initiative. NSTAR Electric’s rate case received a very favorable order, including a rate increase of $64 million, a 9.8% return on equity, and approval of an Advanced Metering Infrastructure project with timely cost recovery, an annual performance-based rate mechanism, as well as a new mechanism for better timely recovery of all other capital investments. Eversource filed with the MA DPU a creative solution that allocates cost between Transmission, Distribution and Solar Developers needed to allow Renewable Distributed Energy Resources in Massachusetts to connect to the grid. Lastly, in Massachusetts, the MA DPU issued an order supporting Eversource’s position that recent increases in property tax expense should be treated as "exogenous," allowing for full recovery. The Federal Energy Regulatory Commission approved an innovative, cost-effective transmission support agreement between Eversource and the offshore wind project, Park City Wind, enabling Eversource to integrate a necessary reliability project with the offshore wind interconnection investment, resulting in savings for customers. In New Hampshire, Eversource was successful with efforts to have the NHPUC reinstate the Energy Efficiency Customer Program and also approved a $9 million step base rate increase. After two years of negotiations and regulatory processes, Eversource received initial approval from the NHPUC allowing for the acquisition of the distribution pole plant owned by Consolidated Communications. Eversource has implemented several emergency response enhancements, including the roll out of its new outage management and community portal systems, which were well received in Connecticut, Massachusetts, and New Hampshire. In addition, Eversource’s Connecticut line worker pipeline program also received great feedback, as well as its support of the Connecticut Governor and Attorney General in helping customers with the recent extraordinary energy supply price increases. The Committee determined this goal to have attained a 170 percent performance result.

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Operational Performance Goals Assessment

•RELIABILITY PERFORMANCE: Electric System Reliability, measured by months between interruptions, was top decile in the industry in 2022; customer power interruptions were on average 19.5 months apart. The Committee determined this goal to have attained a 175 percent performance result.

•RESTORATION PERFORMANCE: The average system outage duration was 65.2 minutes, which was in the top quartile of the utility industry for the fastest restoration time. The Committee determined this goal to have attained a 170 percent performance result.

•SAFETY: Eversource’s safety performance was 1.0, measured by days away, restricted or transferred (DART) per 100 workers, which met the stated goal and continues to improve over 2021, 2020 and 2019 performance. In 2022, Eversource used the DART-OSHA method of measurement for both the goal and 2022 results; 2019-2021 results shown in the graph below were converted to the DART-OSHA results method. The strong partnerships that have been developed between Eversource management and the leadership of our

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unions continue to assist us in both helping safeguard employees and in advancing business initiatives. The Committee determined this goal to be underperforming due to other considerations and to have attained a 50 percent performance result.

•GAS EMERGENCY RESPONSE: On-time response to gas customer emergency calls was 97.8 percent, which continues to exceed mandated emergency response requirements. The Committee determined this goal to have attained a 175 percent performance result.

•DIVERSE LEADERSHIP: Eversource continued its successful drive to increase workforce diversity and build a diverse talent pipeline. In 2022, 61.6 percent of Eversource’s external hires were women and/or people of color and 45.1 percent of external hires and internal promotions into leadership roles were women and/or people of color, slightly above the goal of 45 percent. The Committee determined this goal to have attained a 175 percent performance result.

•SUSTAINABILITY: In 2022, Eversource achieved the target range of 85 percent to 97 percent compared to the peer group assessed by two leading sustainability rating firms, with a combined end of-year ranking of 89.5 percent. In addition, Eversource’s strong environmental, social and governance performance, including the advancement of clean energy initiatives, resulted in numerous national and local awards and recognitions noted in this Item 11. These honors are a result of Eversource’s deep commitment to corporate responsibility, evidenced by the high ratings it receives from leading sustainability raters. Eversource continues to engage with a strong cross-functional network throughout the business to advance its sustainability strategy and drive performance that addresses the evolving expectations of shareholders, customers, employees, regulators and the communities Eversource serves. Eversource continued to position its gas business for long-term success in many areas, including stakeholder engagement, geothermal pilot deployment, advancing RNG/hydrogen supply options, and other methane emission reductions. The Committee determined this goal to have attained a 125 percent performance result.

•ENHANCE THE CUSTOMER EXPERIENCE: Eversource launched the next phase of its customer information and SCADA systems impacting our Massachusetts operations and launched the next phase of its OMNI customer information system. Eversource’s new Outage Management System and Analytics Platform went live in 2022 along with a Storm Restoration Dashboard for storm events incorporating input from town and state stakeholders, all of which enhance Eversource’s emergency response capability and communication with customers. Eversource also implemented additional technologies to reduce cyber threats, modified the View and Report Outage function with the web and enhanced tools that increase customer password security standards. The Committee determined this goal to have attained a 125 percent performance result.

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•CLEAN ENERGY EXECUTION: Eversource made significant progress to advance the siting of all three of its offshore wind projects (South Fork, Sunrise and Revolution Wind) at the federal and state levels, including achieving key permitting milestones and the installation of a critical duct bank system for the South Fork Wind Project. Eversource continues to advance the development of electric vehicle infrastructure in both Connecticut and Massachusetts, successfully executed its first Massachusetts Grid Modernization plan, and submitted its next round of plan investments for approval, including Advanced Metering Infrastructure. Eversource’s commitment to clean energy advanced with the completion of the Provincetown Battery Energy Storage system, as well as demonstrating industry leadership in the MA DPU’s Future of Gas Proceeding. Eversource also executed its $596 million annual energy efficiency program and received MA DPU approval for its $1 billion new energy efficiency three-year program and made solid progress in the Geothermal Pilot Program launched in the city of Framingham, Massachusetts. Eversource announced its commitment to developing Science Based emission targets and continued to position its gas business for long-term success in many areas, including stakeholder engagement, and geothermal pilot deployment. The Committee determined this goal to have attained a 150 percent performance result.

2022 Annual Incentive Program Performance Assessments

Financial Performance Goals
Category	2022 Goal	Eversource Performance	Assessment
Earnings Per Share	$4.06 earnings per share	Exceeded: Non-GAAP earnings per share, excluding costs noted on Exhibit A of this Item 11, equaled $4.09 per share, $0.03 ahead of plan, an increase of 6% over 2021 non-GAAP earnings per share and exceeding the average growth rate of Eversource’s peers.	170%
Dividend Growth	Increase dividend beyond industry average	Achieved: Increased dividend to $2.55 per share, a $0.14 increase and 5.8% growth over 2021, exceeding the industry median of 4.5% and consistent with long range plan and management guidance.	160%
Strategic Growth Initiatives	Advancement of Key Strategic Projects and Regulatory Outcomes	Achieved: Successfully advanced several strategic initiatives and produced positive regulatory outcomes during 2022. Eversource Gas Company of Massachusetts (EGMA) integration and transition was completed ahead of schedule and below budget, exiting the 115 transition service functions. Advanced offshore wind strategic review by launching process with prospective buyers, with an announcement anticipated in the 2nd quarter of 2023. Aquarion Company successfully completed the purchase of The Torrington Water Company, adding about 10,200 customers, and executed a purchase and sale agreement to acquire the Pinehills Water Company, which will add about 2,700 customers upon closing, advancing Eversource’s water customer growth initiative. NSTAR Electric’s distribution rate case was completed with constructive results, including a $64M rate increase and 9.8% return on equity. Filed with the MA DPU a creative solution that allocates cost between Transmission, Distribution and Solar Developers needed to allow Renewable Distributed Energy Resources in MA to connect to the grid; favorable decision on the first of six projects received. The FERC approved an innovative, cost-effective transmission support agreement between Eversource and the offshore wind project, Park City Wind, enabling Eversource to integrate a necessary reliability project, resulting in savings to customers. NHPUC reinstated EE Customer Program and approved a $9M rate increase.	170%
Weightings = Earnings Per Share: 60%; Dividend Growth: 10%; Strategic Growth Initiatives: 30%

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Operational Performance Goals
Category	2022 Goal	Eversource Performance	Assessment
Reliability – Average Months Between Interruptions (MBI)	Achieve MBI of within 17.2 to 19.2 months	Exceeded: MBI = 19.5 months. At the top level of the performance goal’s range and in the top decile of the industry peer group.	175%
Average Restoration Duration (SAIDI)	Achieve SAIDI of 63 to 76 minutes	Achieved: SAIDI = 65.2 minutes. At the top level of the performance range, and in the top quartile of the industry group as measured by recognized industry standards.	170%
Safety Rate (Days Away Restricted Time (DART))	1.0 – 1.4 DART	Achieved: 1.0 DART – At the lower (good) end of the performance goal range; outperformed industry; despite these strong numeric results, the performance assessment was reduced in recognition of the death of an employee who ultimately succumbed to injuries incurred on the job.	50%
Gas Service Response	95% - 97% on time	Achieved: 97.8%; Performance above industry average, meeting or exceeding all regulatory requirements, and above the level of the performance goal range.	175%
Diverse Leadership	40% - 45% diverse hires or promotions of leadership level	Exceeded: 45.1% - 200 out of 443 of Eversource’s promotions and hires were women and/or people of color and 61.6% of external hires were women and/or people of color.	175%
Sustainability Ranking	85th percentile – 97th percentile vs. US peer companies	Achieved: At 89.5th percentile, Eversource’s performance was first quartile; received numerous recognitions and awards acknowledging Eversource’s sustainability excellence again in 2022.	125%
Enhance the Customer Experience	Continued enhancement and efficient execution of Emergency Response Plan, OMNI Customer Information System and new SCADA system and new OMS and analytics program	Achieved: Successful go-live transition of EGMA’s Customer Information System (CIS) and new SCADA system with no system interruptions, while delivering excellent employee and customer experience. Next phase of the OMNI CIS implementation impacting other MA operations has been launched. Advanced Metering Infrastructure plan approved by the MA DPU. Outage Management System and Analytics Platform went live in 2022 along with a Storm Restoration Dashboard for storm events, incorporating input from town and state stakeholders, all of which enhance Eversource’s Emergency Response capability and communication with customers. Additional technologies were implemented to reduce cyber threats. Modified the View and Report Outage function and enhanced tools that increase customer password security standards.	125%
Clean Energy Execution	Successfully advance and execute clean energy initiatives	Achieved: Successfully advanced several additional clean energy initiatives, including the offshore wind ventures, completion of a critical duct bank installation on Long Island and receipt of key permits for all three projects. Advanced the electric vehicle infrastructure program development in CT and site installations in MA, advancing clean energy leadership in New England. Completed Provincetown Battery Energy Storage system; Geothermal Pilot Program launched in the city of Framingham, MA, as well as demonstrating industry leadership in the MA DPU Future of Gas Proceeding. Phase I of the new MA solar program was filed with the MA DPU, while the MA DPU issued a favorable order on the next Grid Mod phase. Once again, Eversource received the ENERGY STARTM Partner of the Year Sustained Excellence Award from the Environmental Protection Agency and U.S. Department of Energy. Advanced clean energy leadership by announcing a commitment to developing “Science Based Targets” for cross-sector emission reductions.	150%
Weightings = Reliability: 25%; Restoration: 25%; Safety, Gas Response, Diversity, Sustainability and Key Initiatives: 50%

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Performance Goals Assessment
Financial Performance at 169% (weighted 70%)	118%
Operational Performance at 154% (weighted 30%)	46%
Overall Performance	164%

Additional Factors

The following important financial, strategic, environmental and customer-focused results were also considered by the Committee in assessing overall financial and operational performance:

•Newsweek magazine ranked Eversource as the #1 energy company in its 2023 list of the Most Responsible Companies. This listing determines the most responsible companies of 2022 based on their corporate social sustainability performance and reputation.

•Eversource was again ranked in the top 100 of America’s Most Just Companies for 2022 by Forbes/JUST Capital in partnership with CNBC. The listing recognizes corporate social responsibility and commitment to local communities and celebrates public companies for their positive impact and leadership on priorities such as ethical leadership, environmental impact, customer treatment, shareholder return, fair pay and benefits, and equal opportunity.

•Eversource was recognized again by the U.S. Department of Labor as a HIRE Vets Medallion Award recipient for its commitment to recruiting, employing, and retaining veterans.

•As You Sow named Eversource a Top 10 Company on both their Racial Justice and DE&I scorecards.

•Eversource was again selected to be included in the Bloomberg Gender-Equality Index, which recognizes companies that have shown their commitment to advancing women’s equality in the workplace and transparency in gender reporting.

•Eversource was recognized as one of America’s “best employers for diversity” by Forbes magazine, which surveyed over 50,000 U.S. employees regarding age, gender, ethnicity, LGBTQA and diversity in their current workplace.

•Eversource was recognized as a finalist for the Healthiest Employer Program for our commitment to workplace wellness and exceptional health benefits.

•Eversource was again selected as a “most honored” company by Institutional Investor magazine for industry leading ESG, investor relations and multiple other categories as voted by institutional investors.

•Eversource was on Barron’s 2022 Most Sustainable Companies list. Barron’s based its list on performance indicators that address environmental, social and governance matters.

•Eversource’s 2022 charitable giving totaled $15.8 million, including major event lead sponsorships for the Eversource Walk for Children’s Hospital of Boston, Eversource Walk and 5K Run for Easterseals New Hampshire, Mass General Cancer Center/Eversource Every Day Amazing Race, Eversource Hartford Marathon, Travelers Championship, and Special Olympics in Connecticut and New Hampshire.

Individual Executives' Performance Factors Considered by the Committee

It is the Committee’s philosophy to provide incentives for Eversource executives to work together as a highly effective, integrated team to achieve or exceed the financial, operational, safety, customer, sustainability, strategic and diversity goals and objectives. The Committee also reviews and assesses individual executive performance. The Committee based the annual incentive payments on team performance and the Committee’s assessment of each executive’s individual performance in supporting the performance goals, additional achievements, and overall results of Eversource. With respect to Eversource’s Chief Executive Officer, the Committee and the independent Trustees assessed performance. Based on the recommendations of the Chief Executive Officer as to executives other than himself, the Committee assessed the performance of the active Named Executive Officers and Eversource to be excellent in totality and approved annual incentive program payments for the active Named Executive Officers noted in the Summary Compensation Table at levels that ranged from 149 percent to 185 percent of target. These payments reflected the individual and team contributions of those Named Executive Officers in achieving the goals and the additional accomplishments and Eversource’s overall performance.

In determining Mr. Nolan’s annual incentive payment of $2,688,000, which was 166 percent of target, and which reflect his and Eversource’s excellent 2022 performance, the Committee and the Board considered the totality of Eversource’s success in accomplishing the goals set by the Committee and Mr. Nolan’s performance in leading Eversource to another very successful year financially, operationally, in Eversource’s continuing successful efforts in all areas of ESG, and in overcoming several challenges resulting from substantial storm expenses and interest rate hikes along with the impacts of inflation and supply chain issues.

2022 and 2021 Annual Incentive Program Awards
Named Executive Officer	2022 Award		2021 Award
Werner J. Schweiger	$	1,050,000	$	1,000,000
John M. Moreira (1)	900,000		—
Gregory B. Butler	720,000		700,000
Christine M. Carmody	720,000		650,000
James W. Hunt, III (1)	500,000		—
Joseph R. Nolan, Jr.	2,688,000		2,250,000
Philip J. Lembo (2)	—		1,050,000

(1)    Messrs. Moreira and Hunt were not Named Executive Officers in 2021.

(2)    Mr. Lembo retired during 2022 and was not eligible to receive an Annual Incentive Award for 2022.

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Long-Term Incentive Program

Eversource’s long-term incentive program is intended primarily to focus on Eversource’s longer-term strategic goals and to also help retain its executives. A new three-year program commences every year. Performance Shares are designed to reward long-term achievements as measured against pre-established performance measures. RSUs are designed to provide executives with an incentive to increase the value of Eversource common shares in alignment with shareholder interests, while also serving as a retention component for executive talent. Eversource’s believes these compensation elements create a focus on continued company and share price growth to further align the interests of the executives with the interests of shareholders.

Performance Share Grants

General

Performance Shares are designed to reward future financial performance, measured by long-term earnings growth and shareholder returns over a three-year performance period, therefore aligning executive compensation with performance. Performance Shares are granted as a target number of Eversource Energy common shares. The number of Performance Shares is determined by dividing the target grant value in dollars by the average daily closing price of Eversource common shares on the New York Stock Exchange for the ten business days preceding the grant date and rounding to the nearest whole share. Until the end of the performance period, the value of dividends that would have been paid with respect to the Performance Shares had the Performance Shares been actual common shares are deemed to be invested in additional Performance Shares, which remain at risk and are not distributed until actual performance for the period is determined and vesting takes place.

Performance Shares under the 2022 – 2024, 2021 – 2023 and 2020 – 2022 Programs

For the 2022 – 2024 Program, the Committee determined it would continue to measure performance using: (i) average diluted earnings per share growth (EPSG); and (ii) relative total shareholder return (TSR) measured against the performance of companies that comprise the EEI Index. As in previous years, the Committee selected EPSG and TSR as performance measures because the Committee continues to believe that they are generally recognized as the best indicators of overall corporate performance. The Committee considers it a best practice to use a combination of relative and absolute metrics, with absolute EPS growth serving as a key input to shareholder value and relative TSR serving as the output.

For the 2021 – 2023 Program, the Committee also increased the percentage of total long-term incentive opportunity that is provided in Performance Shares to 75 percent and decreased the percentage of total long-term incentive opportunity that is provided in RSUs to 25 percent.

The number of Performance Shares awarded at the end of the three-year period ranges from zero percent to 200 percent of target, depending on EPSG and relative TSR performance as set forth in the performance matrices below. Performance Share grants are based on a percentage of annualized base salary at the time of the grant and are measured in dollars. The target number of shares under the 2022 – 2024 Program for Eversource’s Named Executive Officers ranged from 105 percent to 368 percent of base salary. Vesting at 100 percent of target occurs at various combinations of EPSG and TSR performance as set forth in the charts that follow. In addition, the value of any performance shares that actually vest may increase or decrease over the vesting period based on Eversource’s share price performance. The number of performance shares granted at target were approved as set forth in the table below. The Committee and the independent members of Eversource’s Board determined the Performance Share grants for Eversource’s Chief Executive Officer and the Executive Chairman. Based on input from Eversource’s Chief Executive Officer, the Committee determined the Performance Share grants for each of the other executive officers, including the other Named Executive Officers. For all three programs, the Committee used the same performance measures of EPSG and TSR.

The performance matrices set forth below describe how the Performance Share payout was determined under the 2020 – 2022 Program and how the Performance Share payout will be determined under the 2021 – 2023 Program and the 2022 – 2024 Program. Three-year average EPSG is cross-referenced with the actual three-year TSR percentile to determine actual performance share payout as a percentage of target.

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2020 — 2022 Long-Term Incentive Program Performance Share Potential Payout
Three-Year Average EPS Growth	Three-Year Relative Total Shareholder Return Percentiles
	Below 10th	20th	30th	40th	50th	60th	70th	80th	90th	Above 90th
9.5%	110%	120%	130%	140%	150%	160%	170%	180%	190%	200%
8.5%	100%	110%	120%	130%	140%	150%	160%	170%	180%	190%
7.5%	90%	100%	110%	120%	130%	140%	150%	160%	170%	180%
6.5%	80%	90%	100%	110%	120%	130%	140%	150%	160%	170%
5.5%	70%	80%	90%	100%	110%	120%	130%	140%	150%	160%
4.5%	60%	70%	80%	90%	100%	110%	120%	130%	140%	150%
3.5%	40%	50%	70%	80%	90%	100%	110%	120%	130%	140%
2.5%	20%	40%	60%	70%	80%	90%	100%	110%	120%	130%
1.5%	—	10%	40%	60%	70%	80%	90%	100%	110%	120%
0.5%	—	—	20%	30%	50%	70%	80%	90%	100%	110%
0.0%	—	—	—	10%	20%	30%	40%	50%	70%	70%
Below 0%	—	—	—	—	10%	20%	30%	40%	50%	60%

2021 — 2023 and 2022 — 2024 Long-Term Incentive Program Performance Share Potential Payout
Three-Year Average EPS Growth	Three-Year Relative Total Shareholder Return Percentiles
	Below 10th	20th	30th	40th	50th	60th	70th	80th	90th	Above 90th
10.0%	110%	120%	130%	140%	150%	160%	170%	180%	190%	200%
9.0%	100%	110%	120%	130%	140%	150%	160%	170%	180%	190%
8.0%	90%	100%	110%	120%	130%	140%	150%	160%	170%	180%
7.0%	80%	90%	100%	110%	120%	130%	140%	150%	160%	170%
6.0%	70%	80%	90%	100%	110%	120%	130%	140%	150%	160%
5.0%	60%	70%	80%	90%	100%	110%	120%	130%	140%	150%
4.0%	40%	50%	70%	80%	90%	100%	110%	120%	130%	140%
3.0%	20%	40%	60%	70%	80%	90%	100%	110%	120%	130%
2.0%	—	10%	40%	60%	70%	80%	90%	100%	110%	120%
1.0%	—	—	20%	30%	50%	60%	80%	80%	100%	110%
0.0%	—	—	—	10%	20%	30%	40%	50%	60%	70%
Below 0%	—	—	—	—	10%	20%	30%	40%	50%	60%

Long-Term Incentive Program Performance Share Grants at Target
Named Executive Officer	2022 — 2024 Performance Share Grant
Werner J. Schweiger	15,089
John M. Moreira	2,911
Gregory B. Butler	10,739
Christine M. Carmody	8,672
James W. Hunt, III	5,663
Joseph R. Nolan, Jr.	54,871
Philp J. Lembo	14,111

Results of the 2020 – 2022 Performance Share Program

The 2020 – 2022 Program was completed on December 31, 2022. The actual performance level achieved under the Program was a three-year average adjusted EPS growth of 5.8 percent and a three-year total shareholder return at the 45th percentile, which, when interpolated in accordance with the criteria established by the Committee, resulted in vesting performance share units at 108 percent of target. 2020, 2021 and 2022 non-GAAP earnings per share, as described in Exhibit A to this Item 11, were the basis for performance level assessment determined by the Committee at its February 2021, 2022 and 2023 meetings. At its February 1, 2023 meeting, the Committee confirmed that the actual results achieved were calculated in accordance with established performance criteria. The number of Performance Shares awarded to the Named Executive Officers were approved as set forth in the table below.

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2020 – 2022 Long-Term Incentive Program Performance Share Awards
Named Executive Officer	Performance Share Award
Werner J. Schweiger	10,870
John M. Moreira	2,036
Gregory B. Butler	7,739
Christine M. Carmody	6,250
James W. Hunt, III	1,964
Joseph R. Nolan, Jr.	8,965
Philp J. Lembo	10,164

Restricted Share Units (RSUs)

General

Each RSU granted under the long-term incentive program entitles the holder to receive one common share at the time of vesting. All RSUs granted under the long-term incentive program vest in equal annual installments over three years. RSU holders are eligible to receive reinvested dividend units on outstanding RSUs held by them to the same extent that dividends are declared and paid on Eversource common shares. Reinvested dividend equivalents are accounted for as additional RSUs that accrue and are distributed with the common shares issued upon vesting of the underlying RSUs. Common shares, including any additional common shares in respect of reinvested dividend equivalents, are not issued for any RSUs that do not vest.

The Committee determined RSU grants for each Eversource executive officer participating in the long-term incentive program. RSU grants are based on a percentage of annualized base salary at the time of the grant. In 2022, the percentage used for each Named Executive Officer was based on their position in Eversource and ranged from 45 percent to 123 percent of base salary. The Committee reserves the right to increase or decrease the RSU grant from target for each executive officer under special circumstances. The Committee and all other independent members of the Eversource Board determined the RSU grants for the Eversource Chief Executive Officer and the Executive Chairman. Based on input from Eversource’s Chief Executive Officer, the Committee determined the RSU grants for each of the other executive officers, including the other Named Executive Officers.

All RSUs are granted on the date of the Committee meeting at which they are approved. RSU grants are subsequently converted from a percent of salary into common share equivalents by dividing the value of each grant by the average closing price for Eversource common shares over the ten trading days prior to the date of the grant. RSU grants at 100 percent of target were approved as set forth in the table below.

	RSUs Granted
Named Executive Officer	2020	2021 (1)	2022
Werner J. Schweiger	9,235	4,782	5,030
John M. Moreira (2)	—	—	970
Gregory B. Butler	6,575	3,404	3,580
Christine M. Carmody (3)	—	2,749	2,891
James W. Hunt, III (2)	—	—	5,663
Joseph R. Nolan, Jr.	7,616	3,944	18,290
Philip J. Lembo	8,635	4,472	4,704

(1)    Reflects change for 2021 to 75 percent Performance Shares/25 percent RSUs.

(2)    Messrs. Moreira and Hunt were not Named Executive Officers in 2020 and 2021.

(3)    Ms. Carmody was not a Named Executive Officer in 2020.

Clawbacks

If Eversource’s earnings were to be restated as a result of noncompliance with accounting rules caused by fraud or misconduct, or if any plan participant engages in a willful material violation of our Code of Business Conduct or material corporate policy, or the breach of a material covenant in an employment agreement, as determined by the Board of Trustees, the participant will be required by our 2018 Incentive Plan to reimburse us for incentive compensation awards received by them for that year. Eversource is aware of the new clawback rules and will amend its clawback policy over the next year to be in compliance with the new rules.

No Hedging and No Pledging Policy

Eversource has a long-standing policy prohibiting the purchase of any financial instruments or otherwise entering into transactions designed to have the effect of hedging or offsetting any decrease in the value of Eversource common shares or other equity securities of Eversource or its subsidiaries by its Trustees and executives, including exchange-traded options to purchase or sell Eversource securities (so-called “puts” and “calls”) or financial instruments that are designed to hedge or offset any decrease in the market value of Eversource securities (including, but not limited to, prepaid variable forward contracts, equity swaps, collars and exchange funds). This policy also prohibits short sales, the holding of any Eversource common shares in a margin account, borrowing shares, selling future securities that establish a position that increases in value as the

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value of Eversource’s shares decreases, or pledging Eversource common shares. The policy applies to Eversource Trustees and executives but not to non-executives and does not apply to broad-based index funds or similar transactions.

Share Ownership Guidelines and Retention Requirements

The Committee has approved share ownership guidelines to further emphasize the importance of share ownership by officers. As indicated in the table below, the guidelines call for Eversource’s Chief Executive Officer to own common shares equal to six times base salary, executive vice presidents to own a number of common shares equal to three times base salary, senior vice presidents to own common shares equal to two times base salary, and all other officers to own a number of common shares equal to one to one and one-half times base salary. Officers and Eversource Trustees may only transact in Eversource Energy common shares during approved trading windows and are subject to continuing compliance with these share ownership guidelines.

Executive Officer	Base Salary Multiple
Chief Executive Officer/Executive Chairman	6
Executive Vice Presidents	3
Operating Company Presidents / Senior Vice Presidents	2
Vice Presidents	1 – 1.5

Eversource requires that its officers attain these ownership levels within five years after promotion. All officers, including the Named Executive Officers, have either satisfied the share ownership guidelines or are expected to satisfy them within the applicable timeframe. Common shares, whether held of record, in street name, or in individual 401(k) accounts, and RSUs satisfy the ownership requirements. Unvested performance shares do not count toward satisfying the ownership guidelines. In addition to the share ownership guidelines noted above, all officers must hold the net shares awarded under Eversource’s incentive compensation plan until the share ownership guidelines have been met.

Other Benefits

Retirement Benefits

Eversource provides a qualified defined benefit pension program for certain officers, which is a final average pay program subject to tax code limits. Because of such limits, Eversource also maintains a supplemental non-qualified pension program. Benefits are based on base salary and certain incentive payments, which is consistent with the goal of providing a retirement benefit that replaces a percentage of pre-retirement income. The supplemental program compensates for benefits barred by tax code limits, and generally provides (together with the qualified pension program) benefits equal to approximately 60 percent of pre-retirement compensation (approximately 50 percent of such compensation for Mr. Butler). The supplemental program was discontinued in 2012 for newly elected officers.

For certain participants, the benefits payable under the Supplemental Non-Qualified Pension Program differ from those described above. The program benefit payable to Mr. Schweiger is fully vested and is further reduced by benefits he is entitled to receive under previous employers’ retirement plans.

Also see the narrative accompanying the “Pension Benefits” table and accompanying notes for more detail on the above program.

401(k) Benefits

Eversource offers a qualified 401(k) program for all employees, including executives, subject to tax code limits. After applying these limits, the program provides a match of 50 percent of the first eight percent of eligible base salary, up to a maximum of $12,200 per year for Messrs. Schweiger, Moreira, Hunt, Nolan and Lembo, and Ms. Carmody. For Mr. Butler, the program provides a match of 100 percent of the first three percent of eligible base salary, up to a maximum of $9,150 per year.

Deferred Compensation

Eversource offers a non-qualified deferred compensation program for its executives. In 2022, the program allowed deferral of up to 100 percent of base salary, annual incentives and long-term incentive awards. The program allows participants to select investment measures for deferrals based on an array of deemed investment options (including certain mutual funds and publicly traded securities).

See the Non-Qualified Deferred Compensation Table and accompanying notes for additional details on the above program.

Perquisites

Eversource provides executives with limited financial planning benefits, vehicle leasing and access to tickets to sporting events. The current level of perquisites does not factor into decisions on total compensation.

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Contractual Agreements

Eversource currently maintains contractual agreements with certain of our Named Executive Officers that provide for potential compensation in the event of certain terminations, including termination following a Change in Control. These agreements were made to attract and retain high quality executives and to ensure executive focus on Eversource’s business during the period leading up to a potential Change in Control, though we have not entered into a Change in Control or employment agreement with any executive since 2010. The agreements are “double-trigger” agreements that provide executives with compensation in the event of a Change in Control followed by termination of employment due to one or more of the events set forth in the agreements, while still providing an incentive to remain employed with Eversource for the transition period that follows.

Under the agreements, certain compensation is generally payable if, during the applicable change in control period, the executive is involuntarily terminated (other than for cause) or terminates employment for “good reason.” These agreements are described more fully in the Tables following this CD&A under “Payments Upon Termination.”

Tax and Accounting Considerations

Section 162(m) of the Internal Revenue Code precludes a public company from taking an income tax deduction in any one year for compensation in excess of $1 million payable to its named executive officers who are employed on the last day of the fiscal year, unless certain specific performance goals are satisfied. Until January 1, 2018, there was an exception to the $1 million limitation for performance-based compensation meeting certain requirements. This exception was repealed, effective for taxable years beginning after December 31, 2017, and the limitation on deductibility generally was expanded to include all Named Executive Officers. As a result, compensation paid to the Named Executive Officers in excess of $1 million per officer will not be deductible unless it qualifies for transition relief applicable to certain arrangements in place as of and not modified after November 2, 2017.

The Committee believes that the availability of a tax deduction for forms of compensation should be one of many factors taken into consideration of providing market-based compensation to attract and retain highly qualified executives. The Committee believes it is in Eversource’s best interests to retain discretion to make compensation awards, whether or not deductible.

Eversource has adopted the provisions of Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 718, Compensation-Stock Compensation. In general, Eversource and the Committee do not consider accounting considerations in structuring compensation arrangements.

Equity Grant Practices

Equity awards noted in the compensation tables are made annually at the February meeting of the Compensation Committee (subject to further approval by all of the independent members of Eversource’s Board of Trustees of the Chief Executive Officer’s and Executive Chairman’s award) when the Committee also determines base salary, annual incentive opportunities, long-term incentive compensation grants, and annual and long-term performance plan awards. The date of this meeting is chosen at least a year in advance, and therefore awards are not coordinated with the release of material non-public information.

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SUMMARY COMPENSATION TABLE

The table below summarizes the total compensation paid or earned by CL&P’s principal executive officer (Mr. Schweiger), CL&P’s principal financial officer (Mr. Moreira), the three other most highly compensated executive officers in 2022, Mr. Nolan, who served as Chairman of the Board of CL&P during a portion of 2022, and Mr. Lembo, who served as Executive Vice President and Chief Financial Officer of CL&P during a portion of 2022, determined in accordance with the applicable SEC disclosure rules (collectively, the Named Executive Officers). As explained in the tables and footnotes below, the amounts reflect the economic benefit to each Named Executive Officer of the compensation item paid or accrued on their behalf for the fiscal year ended December 31, 2022 in accordance with such rules. All salaries, annual incentive amounts and long-term incentive amounts shown for each Named Executive Officer were paid for all services rendered to Eversource Energy and its subsidiaries, including CL&P, in all capacities.

Name and Principal Position	Year	Salary		Stock Awards (7)	Non-Equity Incentive Plan (8)	Change in Pension Value and Non- Qualified Deferred Earnings (9)	All Other Compen- sation (10)	SEC Total		Adjusted SEC Total (11)
Werner J. Schweiger (1)	2022	$	787,693	1,877,101	1,050,000	—	20,589	$	3,735,383	$	3,735,383
Executive Vice President and Chief Operating Officer of Eversource Energy and Chairman of the Board and Chief Executive Officer of CL&P	2021	770,001		1,748,151	1,000,000	852,718	19,989	4,390,859		3,538,141
	2020	765,885		1,721,496	950,000	2,698,083	20,657	6,156,121		3,458,038
John M. Moreira (2)	2022	543,056		362,099	900,000	419,646	12,200	2,237,001		$	1,817,355
Executive Vice President, Chief Financial Officer and Treasurer of Eversource Energy and CL&P
Gregory B. Butler	2022	685,387		1,335,961	720,000	—	12,106	2,753,454		2,753,454
Executive Vice President and General Counsel of Eversource Energy and CL&P	2021	670,002		1,244,544	700,000	2,611,448	11,656	5,237,650		2,626,202
	2020	670,292		1,225,646	700,000	1,637,907	15,839	4,249,684		2,611,777
Christine M. Carmody (3)	2022	553,808		1,078,826	720,000	—	20,583	2,373,217		2,373,217
Executive Vice President-Human Resources and Info Technology of Eversource Energy	2021	541,001		1,005,122	650,000	645,323	19,983	2,861,429		2,216,106
James W. Hunt, III (4)	2022	458,077		854,553	500,000	127,089	22,852	1,962,571		1,835,482
Executive Vice President-Corporate Relations and Sustainability and Secretary of Eversource Energy
Joseph R. Nolan, Jr. (5)	2022	1,273,078		6,825,923	2,688,000	2,143,443	28,690	12,959,134		10,815,691
Chairman of the Board, President and Chief Executive Officer of Eversource Energy; Former Chairman of CL&P	2021	1,004,424		1,441,650	2,250,000	1,705,782	65,222	6,467,078		4,761,296
	2020	630,962		1,419,699	850,000	2,134,658	18,921	5,054,240		2,919,582
Philip J. Lembo (6)	2022	642,497		1,755,438	—	—	26,285	2,424,220		2,424,220
Retired Executive Vice President and Chief Financial Officer of Eversource Energy and CL&P	2021	720,001		1,634,650	1,050,000	713,766	20,685	4,139,102		3,425,336
	2020	718,846		1,609,650	950,000	1,248,852	21,985	4,549,333		3,300,481

(1)    Mr. Schweiger was elected Chairman of the Board of CL&P on May 27, 2022.

(2)    Mr. Moreira was elected Executive Vice President, Chief Financial Officer and Treasurer of Eversource Energy and CL&P on May 4, 2022. He was not a Named Executive Officer in 2020 and 2021.

(3)    Ms. Carmody was not a Named Executive Officer in 2020.

(4)    Mr. Hunt was not a Named Executive Officer in 2020 and 2021.

(5)    Mr. Nolan served as Chairman of the Board and a director of CL&P from May 5, 2021 to May 27, 2022.

(6)    Mr. Lembo transitioned to a non-executive role on May 4, 2022, and retired effective November 30, 2022.

(7)    RSUs were granted to each Named Executive Officer in 2022 as long-term compensation, which vest in equal annual installments over three years. Each of the Named Executive Officers, except for Mr. Lembo, was also granted performance shares as long-term incentive compensation. These performance shares will vest based on the extent to which the performance conditions described in the CD&A are achieved as of December 31, 2024. The grant date fair values for the performance shares, assuming achievement of the highest level of both performance conditions, are as follows: Mr. Schweiger: $2,100,389; Mr. Moreira: $405,211; Mr. Butler: $1,494,869; Ms. Carmody: $1,207,142; Mr. Hunt: $788,290 and Mr. Nolan: $7,683,043.

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Holders of RSUs and performance shares are eligible to receive dividend equivalent units on outstanding awards to the same extent that dividends are declared and paid on Eversource common shares. Dividend equivalent units are accounted for as additional common shares that accrue and are distributed simultaneously with those common shares that are issued upon vesting of the underlying RSUs and performance shares. No dividends are paid unless and until the underlying shares vest.

(8)    Consists of payments to the Named Executive Officers under the 2022 Annual Incentive Program. Mr. Lembo retired during 2022 and was not eligible to receive an Annual Incentive Award for 2022.

(9)    Includes the actuarial increase in the present value from December 31, 2021 to December 31, 2022 of the Named Executive Officers’ accumulated benefits under all of our defined benefit pension programs and agreements, determined using interest rate and mortality rate assumptions consistent with those appearing in the footnotes to our Annual Report on Form 10-K for the fiscal year ended December 31, 2022. The Named Executive Officer may not be fully vested in such amounts. More information on this topic is set forth in the Pension Benefits table. There were no above-market earnings in deferred compensation value during 2022, as the terms of the Deferred Compensation Plan provide for market-based investments, including Eversource common shares.

(10)    Includes matching contributions allocated by us to the accounts of Named Executive Officers under the 401k Plan as follows: $12,200 for each of Messrs. Schweiger, Moreira, Hunt, Nolan and Lembo, and Ms. Carmody, and $9,150 for Mr. Butler. For Mr. Nolan, the value shown includes financial planning services valued at $10,000, $4,085, representing the value in 2022 of a company-owned vehicle provided to Mr. Nolan, and $2,405 for home security systems provided in accordance with the company’s security protocols. For Mr. Lembo, the value shown includes financial planning services valued at $10,500, and $3,585, representing the value in 2022 of a company-owned vehicle provided to Mr. Lembo. None of the other Named Executive Officers received perquisites valued in the aggregate in excess of $10,000.

(11)    The amounts in the Adjusted SEC Total column reflect an adjustment to the total compensation reported in the column marked SEC Total. The Adjusted SEC Total subtracts the actuarial change in pension value disclosed in the column titled “Change in Pension Value and Non-Qualified Deferred Earnings” as further described in footnote 6 above in order to reflect compensation earned during the year by the executive without consideration of pension benefit impacts. The amounts in this column differ substantially from, and are not a substitute for, the amounts noted in the SEC Total.

GRANTS OF PLAN-BASED AWARDS DURING 2022

The Grants of Plan-Based Awards Table below provides information on the range of potential payouts under all incentive plan awards during the fiscal year ended December 31, 2022. The table also discloses the underlying equity awards and the grant date for equity-based awards. Eversource has not granted any stock options since 2002.

														All Other Stock Awards: Number of  Shares of Stock or Units (#) (2)		Grant Date Fair Value of  Stock and Option Awards ($) (3)
		Estimated Future Payouts Under Non-Equity Incentive Plan Awards						Estimated Future Payouts Under Equity Incentive Plan Awards (1)
	Grant Date	Threshold ($)		Target ($)		Maximum ($)		Threshold ($)		Target (#)		Maximum (#)
Name
Werner J. Schweiger
Annual Incentive (4)	2/2/2022	$	317,000	$	634,000	$	1,268,000	$	—	$	—	$	—	$	—	$	—
Long-Term Incentive (5)	2/2/2022	—		—		—		—		15,089		30,178		5,030		1,877,101
John M. Moreira
Annual Incentive (4)	2/2/2022	250,000		500,000		1,000,000		—		—		—		—		—
Long-Term Incentive (5)	2/2/2022	—		—		—		—		2,911		5,822		970		362,099
Gregory B. Butler
Annual Incentive (4)	2/2/2022	241,500		483,000		966,000		—		—		—		—		—
Long-Term Incentive (5)	2/2/2022	—		—		—		—		10,739		21,478		3,580		1,335,961
Christine M. Carmody
Annual Incentive (4)	2/2/2022	195,000		390,000		780,000		—		—		—		—		—
Long-Term Incentive (5)	2/2/2022	—		—		—		—		8,672		17,344		2,891		1,078,826
James W. Hunt, III
Annual Incentive (4)	2/2/2022	140,500		281,000		562,000		—		—		—		—		—
Long-Term Incentive (5)	2/2/2022	—		—		—		—		5,663		1,888		3,580		854,553
Joseph R. Nolan, Jr.
Annual Incentive (4)	2/2/2022	809,500		1,619,000		3,238,000		—		—		—		—
Long-Term Incentive (5)	2/2/2022	—		—		—				54,871		109,742		18,290		6,825,923
Philip J. Lembo
Annual Incentive (4)	2/2/2022	—		—		—		—		—		—		—		—
Long-Term Incentive (5)	2/2/2022	—		—		—		—		14,111		28,222		4,704		1,755,438

(1)    Reflects the number of performance shares granted to each of the Named Executive Officers on February 2, 2022 under the 2022 – 2024 Long-Term Incentive Program. Performance shares were granted subject to a three-year Performance Period that ends on December 31, 2024. At the end of the Performance Period, Eversource common shares will be awarded based on actual performance results as a percentage of target, subject to reduction for applicable payroll withholding taxes. Holders of performance shares are eligible to receive dividend equivalent units on outstanding performance shares awarded to them to the same extent that dividends are declared and paid on our common shares. Dividend equivalent units are accounted for as additional

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common shares that accrue and are distributed simultaneously with the number of common shares underlying the performance shares that are actually awarded. No dividends are paid unless and until the underlying shares vest. The Annual Incentive Program did not include an equity component.

(2)    Reflects the number of RSUs granted to each of the Named Executive Officers on February 2, 2022 under the 2022 – 2024 Long-Term Incentive Program. RSUs vest in equal installments on February 2, 2023, 2024 and 2025. Eversource common shares are distributed with respect to vested RSUs on a one-for-one basis following vesting, after reduction for applicable payroll withholding taxes. Holders of RSUs are eligible to receive dividend equivalent units on outstanding RSUs awarded to them to the same extent that dividends are declared and paid on our common shares. Dividend equivalent units are accounted for as additional common shares that accrue and are distributed simultaneously with those common shares actually distributed in respect of the underlying RSUs. No dividends are paid unless and until the underlying shares vest.

(3)    Reflects the grant date fair value, determined in accordance with FASB ASC Topic 718, of RSUs and performance shares granted to the Named Executive Officers on February 2, 2022 under the 2022 – 2024 Long-Term Incentive Program.

(4)    The threshold payment under the Annual Incentive Program is 50 percent of target. The actual payments in 2022 for performance in 2022 are set forth in the Non-Equity Incentive Plan column of the Summary Compensation Table.

(5)    Reflects the range of potential payouts, if any, pursuant to performance share awards under the 2022 – 2024 Long-Term Incentive Program, as described in the CD&A.

OUTSTANDING EQUITY GRANTS AT DECEMBER 31, 2022

The following table sets forth RSU and performance share grants outstanding at the end of the fiscal year ended December 31, 2022 for each of the Named Executive Officers. There are no outstanding options.

	Stock Awards (1)
	Number of Shares or Units of Stock That Have Not Vested (#) (2)	Market Value of Shares or Units of Stock That Have Not Vested ($) (3)		Equity Incentive Plan Awards: Number of Unearned Shares, Units or Other Rights That Have Not Vested (#) (4)	Equity Incentive Plan Awards: Market or Payout Value of Unearned Shares, Units or Other Rights That Have Not Vested ($) (5)
Name
Werner J. Schweiger	11,833	$	992,038	40,530	$	3,398,016
John M. Moreira	2,264	189,806		7,762	650,778
Gregory B. Butler	8,423	706,205		28,852	2,418,915
Christine M. Carmody	6,802	570,267		23,300	1,953,481
James. W. Hunt, III	7,314	613,229		10,410	872,749
Joseph R. Nolan, Jr.	24,228	2,031,254		76,832	6,441,623
Philip J. Lembo	10,264	860,506		36,696	3,076,595

(1)    Awards and market values of awards appearing in the table and the accompanying notes have been rounded to whole units.

(2)    A total of 28,578 unvested RSUs vested on February 15, 2023 (Mr. Schweiger: 6,723; Mr. Moreira: 1,278; Mr. Butler: 4,786; Ms. Carmody: 3,864; Mr. Hunt: 1,559; and Mr. Nolan: 10,368). A total of 16,993 unvested RSUs will vest on February 15, 2024 (Mr. Schweiger: 3,394; Mr. Moreira: 655; Mr. Butler: 2,415; Ms. Carmody: 1,951; Mr. Hunt: 956; and Mr. Nolan: 7,622). A total of 11,138 unvested RSUs will vest on February 2, 2025 (Mr. Schweiger: 1,716; Mr. Moreira: 331; Mr. Butler: 1,222; Ms. Carmody: 986; Mr. Hunt: 645; and Mr. Nolan: 6,238). For Mr. Lembo, all of the unvested RSUs will vest and will be distributed on June 1, 2023.

(3)    The market value of RSUs is determined by multiplying the number of RSUs by $83.84, the closing price of Eversource Energy common shares on December 30, 2022, the last trading day of the year.

(4)    Reflects the target payout level for performance shares granted under the 2020 – 2022 Program, the 2021 – 2023 Program and the 2022 – 2024 Program.

The performance period for the 2020 – 2022 Program ended on December 31, 2022. Awards under that program are set forth in the CD&A under the “Results of the 2020 – 2022 Performance Share Program.”

The performance share awards for 2021 – 2023 Program and the 2022 – 2024 Program will be based on actual performance results as a percentage of target, subject to reduction for applicable payroll withholding taxes. As described more fully under “Performance Shares” in the CD&A and footnote (1) to the Grants of Plan-Based Awards table, performance shares will vest following a three-year performance period based on the extent to which the two performance conditions are achieved. Under the 2021 – 2023 Program, a total of 66,799 performance shares (including accrued dividend equivalents) will vest based on the extent to which the two performance conditions described in the CD&A are achieved as of December 31, 2023. Assuming achievement of these conditions at a target level of performance, the amount of the awards would be as follows: Mr. Schweiger: 15,102; Mr. Moreira: 2,912; Mr. Butler: 10,752; Ms. Carmody: 8,648; Mr. Hunt: 2,810; Mr. Nolan: 12,454; and Mr. Lembo: 14,121. Under the 2022 – 2024 Program, a total of 113,444 performance shares (including accrued dividend equivalents) will vest based on the extent to which the two performance conditions described in the CD&A are achieved as of December 31, 2024. Assuming achievement of these conditions at a target level of performance, the amount of the awards would be as follows: Mr. Schweiger: 15,438; Mr. Moreira: 2,978; Mr. Butler: 10,987; Ms. Carmody: 8,873; Mr. Hunt: 5,794; Mr. Nolan: 56,140; and Mr. Lembo: 13,234. No dividends are paid unless and until the underlying shares vest.

(5)    The market value is determined by multiplying the number of performance shares in the adjacent column by $83.84, the closing price of Eversource Energy common shares on December 30, 2022, the last trading day of the year.

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OPTION EXERCISES AND STOCK VESTED IN 2022

The following table reports amounts realized on equity compensation during the fiscal year ended December 31, 2022. The Stock Awards columns report the vesting of RSU and performance share grants to the Named Executive Officers in 2022. There were no options exercised as Eversource has not granted options since 2002.

	Stock Awards
	Number of Shares Acquired on Vesting (#) (1)	Value Realized on Vesting (2)
Name
Werner J. Schweiger	25,673	$	2,067,601
John M. Moreira	5,519	444,229
Gregory B. Butler	20,612	1,659,093
Christine M. Carmody	16,650	1,340,151
James W. Hunt, III	4,893	394,069
Joseph R. Nolan, Jr.	19,714	1,588,275
Philip J. Lembo	25,354	2,041,421

(1)    Includes RSUs and performance shares granted to the Named Executive Officers under the long-term incentive programs, including dividend reinvestment, as follows:

Name	2019 Program	2020 Program	2021 Program
Werner J. Schweiger	20,779	3,254	1,640
John M. Moreira	4,593	610	316
Gregory B. Butler	17,128	2,318	1,167
Christine M. Carmody	13,836	1,871	942
James W. Hunt, III	3,973	606	314
Joseph R. Nolan, Jr.	15,678	2,684	1,352
Philip J. Lembo	20,779	3,043	1,533

In all cases, the distribution of common shares are reduced by that number of shares valued in an amount sufficient to satisfy payroll tax withholding obligations.

(2)    Values realized on vesting of RSUs granted under the 2019 – 2021, 2020 – 2022 and 2021 – 2023 Programs were based on $82.21 per share, the closing price of Eversource Energy common shares on February 14, 2022. Values realized on vesting of performance shares granted under the 2019 – 2021 Program were based on $79.70 per share, the closing price of Eversource Energy common shares on February 23, 2022.

PENSION BENEFITS IN 2022

The Pension Benefits Table shows the estimated present value of accumulated retirement benefits payable to each Named Executive Officer upon retirement based on the assumptions described below. The table distinguishes between benefits available under the qualified pension plan program (QP), the pension equity plan program (PEP), the supplemental pension program (SERP), and the supplemental pension (Excess). See the narrative above in the CD&A under the captions “Other Benefits – Retirement Benefits” and “Contractual Agreements” for additional information on benefits under these plans and agreements.

The values shown in the Pension Benefits Table for Messrs. Nolan, Lembo, Schweiger and Judge and Ms. Carmody were calculated as of December 31, 2022 based on benefit payments in the form of a lump sum. For Mr. Butler, a payment of benefits was assumed in the form of a contingent annuitant option. Such earned pension program benefit value could otherwise have changed because of the reduction in mortality factors and potentially rising interest rates.

The values shown in this Table for the Named Executive Officers were based on benefit payments on the actual ages or the earliest possible ages for retirement with unreduced benefits for the Named Executive Officers: Mr. Schweiger: age 55, Mr. Butler: age 62, Ms. Carmody: age 62, Mr. Nolan: age 62, and Mr. Lembo: age 62.

In addition, benefits were determined under the qualified pension program using tax code limits in effect on December 31, 2022. For Messrs. Schweiger, Moreira, Hunt, Nolan and Lembo and Ms. Carmody, the values shown reflect actual 2022 salary and annual incentives earned in 2021 but paid in 2022 (per applicable supplemental program rules). For Mr. Butler, the values shown reflect actual 2022 salary and annual incentives earned in 2022 but paid in 2023 (per applicable supplemental program rules).

The present value of benefits at retirement age were determined using the discount rate within a range of 5.16 percent to 5.17 percent under ASC 715-30 pension accounting for the 2022 fiscal year end measurement as of December 31, 2022. This present value assumes no pre-retirement mortality, turnover or disability. However, for the postretirement period beginning at retirement age, the 2022 IRS lump sum mortality table was used for Messrs. Schweiger, Moreira, Hunt, Nolan and Lembo and Ms. Carmody. The RP2014 Employee Table Projected Generationally with Scale MP2020 was used for Mr. Butler. This new mortality table (as published by the Society of Actuaries in 2014) and projection scale were used

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by the Eversource Pension Plan for year-end 2022 financial disclosure. Additional assumptions appear in the footnotes to this Annual Report on Form 10‑K.

Pension Benefits
		Number of Years Credited Service (#)	Present Value of Accumulated Benefit		During Last Fiscal Year
Name	Plan Name
Werner J. Schweiger	Retirement Plan (QP)	20.83	$	770,967	$	—
	Supplemental Plan (Excess)	20.83	3,901,275		—
	Supplemental Plan (SERP)	20.00	8,258,175		—
John M. Moreira	Retirement Plan (QP)	22.67	773,402		—
	Supplemental Plan (PEP)	22.67	1,340,447		—
Gregory B. Butler	Retirement Plan (QP)	26.00	1,436,573		—
	Supplemental Plan (Excess)	26.00	6,296,128		—
	Supplemental Plan (Excess)	26.00	4,260,121		—
Christine M. Carmody	Retirement Plan (QP)	19.25	650,082		—
	Supplemental Plan (Excess)	19.25	1,990,139		—
	Supplemental Plan (SERP)	16.00	3,964,751		—
James W. Hunt, III	Retirement Plan (QP)	10.25	297,491		—
	Supplemental Plan (Excess)	10.25	498,737		—
Joseph R. Nolan, Jr.	Retirement Plan (QP)	37.42	1,110,849		—
	Supplemental Plan (PEP)	37.42	7,730,512		—
	Supplemental Plan (SERP)	20.00	7,111,910		—
Philip J. Lembo	Retirement Plan (QP)	39.08	1,979,805		—
	Supplemental Plan (PEP)	39.08	21,906		—
	Supplemental Plan (SERP)	39.08	8,863,836		—

NONQUALIFIED DEFERRED COMPENSATION IN 2022

The following table reports amounts contributed in 2022, together with aggregate earnings on contributions and withdrawals or distributions on contributions in 2022, under the Eversource deferred compensation program, along with aggregate balances on contributions. See the narrative above in the CD&A under the caption “Other Benefits - Deferred Compensation” for more detail on our non-qualified deferred compensation program.

	Executive Contributions in Last FY		Registrant Contributions in Last FY		Aggregate Earnings in in Last FY		Aggregate Withdrawals/ Distributions		Aggregate Balance at Last FYE (1)
Name
Werner J. Schweiger	$	—	$	—	$	(5,041,612)	$	—	$	21,263,902
John M. Moreira	—		—		—		—		—
Gregory B. Butler	—		—		(2,567)		—		29,310
Christine M. Carmody	—		—		(134,743)		—		1,554,461
James W. Hunt, III	—		—		—		—		—
Joseph R. Nolan, Jr.					(738,565)				7,466,727
Philip J. Lembo	—		—		(350,036)		—		1,736,907

(1)    Includes the total market value of deferred compensation program balances at December 31, 2022, plus the value of vested RSUs or other awards for which the distribution of common shares is currently deferred, based on $83.84, the closing price of Eversource Energy common shares on December 30, 2022, the last trading day of the year. The aggregate balances reflect a significant level of earnings on previously earned and deferred compensation.

POTENTIAL PAYMENTS UPON TERMINATION OR CHANGE IN CONTROL

The discussion and tables below show compensation payable to each Named Executive Officer who is still an employee of Eversource, in the event of: (i) voluntary termination; (ii) involuntary not-for-cause termination; (iii) termination in the event of death or disability; and (iv) termination following a change in control. No amounts are payable in the event of a termination for cause. The amounts shown assume that each termination was effective as of December 31, 2022, the last business day of the fiscal year.

Generally, a “change in control” means a change in ownership or control effected through (i) the acquisition of 30 percent or more of the combined voting power of common shares or other voting securities (20 percent for Mr. Butler, excluding certain defined transactions); (ii) the acquisition of more than 50 percent of our common shares, excluding certain defined transactions (for Messrs. Schweiger, Moreira, Hunt and Nolan and Ms. Carmody); (iii) a change in the majority of the Eversource Board of Trustees, unless approved by a majority of the incumbent Trustees; (iv) certain reorganizations, mergers or consolidations where substantially all of the persons who were the beneficial owners of the outstanding common shares immediately prior to such business combination do not beneficially own more than 50 percent of the voting power of the resulting business entity (excluding in certain cases defined transactions); and (v) complete liquidation or dissolution of Eversource, or a sale or disposition of all or substantially all of the assets of Eversource other than, for Mr. Butler, to an entity with respect to which following completion of the

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transaction more than 50 percent of common shares or other voting securities is then owned by all or substantially all of the persons who were the beneficial owners of common shares and other voting securities immediately prior to such transaction.

In the event of a change in control, the Named Executive Officers are generally entitled to receive compensation and benefits following either involuntary termination of employment without “cause” or voluntary termination of employment for “good reason” within the applicable period (generally two years following a change in control). The Compensation Committee believes that termination for good reason is conceptually the same as termination “without cause” and, in the absence of this provision, potential acquirers would have an incentive to constructively terminate executives to avoid paying severance. Termination for “cause” generally means termination due to a felony or certain other convictions; fraud, embezzlement, or theft in the course of employment; intentional, wrongful damage to Eversource property; gross misconduct or gross negligence in the course of employment or gross neglect of duties harmful to Eversource; or a material breach of obligations under the agreement. “Good reason” for termination generally exists after assignment of duties inconsistent with executive’s position, a material reduction in compensation or benefits, a transfer more than 50 miles from the executive’s pre-change in control principal business location (or for Messrs. Schweiger, Moreira, Hunt and Nolan and Ms. Carmody, an involuntary transfer outside the greater Boston metropolitan area), or requiring business travel to a substantially greater extent than required prior to the change in control.

The summaries above do not purport to be complete and are qualified in their entirety by the actual terms and provisions of the agreements and plans, copies of which have been filed as exhibits to this Annual Report on Form 10-K.

Payments Upon Termination

Regardless of the manner in which the employment of a Named Executive Officer terminates, the executive is entitled to receive certain amounts earned during the executive’s term of employment. Such amounts include:

•Vested RSUs and certain other vested awards;

•Amounts contributed and any vested matching contributions under the deferred compensation program;

•Pay for unused vacation; and

•Amounts accrued and vested under the pension/supplemental and 401k programs (except in the event of a termination for cause under the supplemental program).

The following table describes additional compensation payable to the Named Executive Officers in the event of voluntary termination, involuntary termination not for cause, termination in the event of death or disability and termination following a change in control. No benefits are provided in the event of termination for cause. See the section above captioned “Pension Benefits in 2022” for information about the pension program, supplemental program and other benefits, and the section captioned “Nonqualified Deferred Compensation in 2022.”

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POST-EMPLOYMENT COMPENSATION PAYMENTS UPON TERMINATION

Name	Type of Payments	Voluntary Termination		Involuntary Termination Not for Cause		Termination Upon Death or Disability		Termination Following a Change in Control
Werner J. Schweiger	Annual Incentives (1)	$	—	$	—	$	—	$	634,000
	Performance Shares (2)	2,112,988		2,112,988		2,112,988		3,398,016
	RSUs (3)	518,576		518,576		518,576		992,038
	Special Retirement Benefit (4)	—		—		—		715,351
	Health and Welfare Benefits (5)	—		—		—		74,867
	Perquisites (6)	—		—		—		16,500
	Separation Payment for Liquidated Damages (8)	—		—		—		5,379,000
	Total	$	2,631,564	$	2,631,564	$	2,631,564	$	11,209,772
John M. Moreira	Annual Incentives (1)	$	—	$	—	$	—	$	500,000
	Performance Shares (2)	402,897		402,897		402,897		650,777
	RSUs (3)	98,557		98,557		98,557		189,806
	Special Retirement Benefit (4)	—		—		—		—
	Health and Welfare Benefits (5)	—		—		—		—
	Perquisites (6)	—		—		—		—
	Separation Payment for Liquidated Damages (8)	—		—		—		—
	Total	$	501,454	$	501,454	$	501,454	$	1,340,583
Gregory B. Butler	Annual Incentives (1)	$	—	$	—	$	—	$	483,000
	Performance Shares (2)	1,504,249		1,504,249		1,504,249		2,418,915
	RSUs (3)	369,187		369,187		369,187		706,204
	Health and Welfare Benefits (5)	—		47,287		—		70,931
	Perquisites (6)	—		11,000		—		16,500
	Separation Payment for Liquidated Damages (8)	—		1,173,000		—		1,173,000
	Separation Payment for Non-Compete Agreement (9)	—		1,173,000		—		2,346,000
	Total	$	1,873,436	$	4,277,723	$	1,873,436	$	7,214,550
Christine M. Carmody	Annual Incentives (1)	$	—	$	—	$	—	$	390,000
	Performance Shares (2)	1,214,833		1,214,833		1,214,833		1,953,481
	RSUs (3)	298,046		298,046		298,046		570,267
	Health and Welfare Benefits (5)	—		—		—		11,737
	Perquisites (6)	—		—		—		16,500
	Separation Payment for Liquidated Damages (8)	—		—		—		3,608,930
	Total	$	1,512,879	$	1,512,879	$	1,512,879	$	6,550,915
James W. Hunt, III	Annual Incentives (1)	$	—	$	—	$	—	$	281,000
	Performance Shares (2)	469,531		469,531		469,531		872,749
	RSUs (3)	120,225		120,225		120,225		264,885
	Health and Welfare Benefits (5)	—		—		—		—
	Perquisites (6)	—		—		—		—
	Separation Payment for Liquidated Damages (8)	—		—		—		—
	Total	$	589,756	$	589,756	$	589,756	$	1,418,634
Joseph R. Nolan, Jr.	Annual Incentives (1)	$	—	$	—	$	—	$	1,619,000
	Performance Shares (2)	2,943,513		2,943,513		2,943,513		6,441,624
	RSUs (3)	799,681		799,681		799,681		2,031,254
	Special Retirement Benefit (4)	—		—		—		16,580,742
	Health and Welfare Benefits (5)	—		—		—		109,680
	Perquisites (6)	—		—		—		30,000
	Excise Tax and Gross-ups (7)	—		—		—		10,872,687
	Separation Payment for Liquidated Damages (8)	—		—		—		10,635,000
	Total	$	3,743,194	$	3,743,194	$	3,743,194	$	48,319,987

(1)    For Termination Following a Change in Control: Represents target 2022 annual incentive awards as described in the Grants of Plan Based Awards Table.

(2)    For Voluntary Termination and Involuntary Termination Not For Cause, and Termination Upon Death or Disability: Represents 100 percent of the performance share awards under the 2020 – 2022 Long-Term Incentive Program, 67 percent of the performance share awards under the 2021 – 2023 Long-Term Incentive Program, and 33 percent of the performance share awards under the 2022 – 2024 Long-Term Incentive Program. The values were calculated by multiplying the number of RSUs by $83.84, the closing price of Eversource common shares on December 30, 2022, the last trading day of the year. For Termination Following a Change in Control: Represents 100 percent of the performance share awards under each of the three Programs noted in the previous two sentences.

(3)    For Voluntary Termination and Involuntary Termination Not For Cause, and Termination Upon Death or Disability: Represents values of RSUs granted under our long-term incentive programs that, at year-end 2022, were unvested under applicable vesting schedules. Under these programs, RSUs vest pro rata based on credited service years and age at termination, and time worked during the vesting period. For all, the values were calculated by multiplying the

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number of RSUs by $83.84, the closing price of Eversource common shares on December 30, 2022, the last trading day of the year. For Termination Following a Change in Control: Represents values of all RSUs granted under our long-term incentive programs that, at year-end 2022, were unvested under applicable vesting schedules, all of which vest in full.

(4)    For Termination Following a Change in Control: Represents actuarial present values at year-end 2022 of amounts payable solely under employment agreements upon termination (which are in addition to amounts due under the pension program). For Messrs. Schweiger and Nolan, pension benefits were calculated by adding three years of service. A lump sum of this benefit value is payable to Messrs. Schweiger and Nolan. Pension amounts shown in the table are present values at year-end 2022 of benefits payable upon termination as described with respect to the Pension Benefits Table above.

(5)    The amount noted in the Involuntary Termination, Not for Cause: Represents for Mr. Butler the value of two years’ employer contributions toward active health, long-term disability, and life insurance benefits, plus a payment to offset any taxes thereon. For Termination Following a Change in Control: represents estimated Company cost at year-end 2022 (estimated by our consultants) of providing post-employment health and welfare benefits beyond those available to non-executives upon involuntary termination. The amounts shown in the table for Messrs. Schweiger and Nolan represent the value of three years (two years for Ms. Carmody) continued health and welfare plan participation. The amounts shown in the table for Mr. Butler represent the value of three years’ employer contributions toward active health, long-term disability, and life insurance benefits, plus a payment to offset any taxes on the value of these benefits, less the value of one year of retiree health coverage at retiree rates.

(6)    The amount for Involuntary Termination, Not for Cause: Represents Company cost of reimbursing Mr. Butler for two years of financial planning and tax preparation fees. For Termination Following a Change in Control: Represents Company cost of reimbursing Messrs. Schweiger, Nolan and Butler for three years (two years for Ms. Carmody and Mr. Hunt) of financial planning and tax preparation fees.

(7)    For Termination Following a Change in Control: Represents payments made to offset costs associated with certain excise taxes under Section 280G of the Internal Revenue Code. Executives may be subject to certain excise taxes under Section 280G if they receive payments and benefits related to a Termination Following a Change in Control that exceed specified Internal Revenue Service limits. Contractual agreements with the above executives provide for a grossed-up reimbursement of these excise taxes. The amounts in the table are based on the Section 280G excise tax rate of 20 percent, the statutory federal income tax withholding rate of 35 percent, the applicable state income tax rate, and the Medicare tax rate of 1.45 percent.

(8)    For Involuntary Termination, Not for Cause: Represents for Mr. Butler a severance payment (two-times the sum of base salary plus relevant annual incentive award) in addition to any non-compete agreement payment described above. For Termination Following a Change in Control: Represents severance payments in addition to any non-compete agreement payments described in the prior note. For Messrs. Schweiger, and Nolan and Ms. Carmody, this payment equals three-times the sum of base salary plus relevant annual incentive award (two-times the sum for Mr. Butler). Pursuant to Ms. Carmody’s agreement, the lump sum severance payment and payment of the value of three additional years of service under the SERP as provided under the agreement are limited to 2.99 times the sum of her most recent annual base salary and annual bonus during the period prior to the date of termination. These payments do not replace, offset or otherwise affect the calculation or payment of the annual incentive awards.

(9)    For Involuntary Termination, Not For Cause and Termination Following a Change in Control: Represents payments made under agreements or Eversource programs to Mr. Butler as consideration for agreement not to compete with Eversource following termination of employment, equal to the sum of base salary plus relevant annual incentive award. These payments do not replace, offset or otherwise affect the calculation or payment of the annual incentive awards.

Payments to Retired Named Executive Officer

Mr. Lembo retired effective November 30, 2022. Mr. Lembo will receive common shares in respect of RSUs granted under the 2020, 2021 and 2022 RSU programs on June 1, 2023, the scheduled distribution date. The estimated aggregate value of these common shares is $850,447, based on a price of $82.86 per common share, the closing price of Eversource’s common shares on November 30, 2022. Mr. Lembo will also receive common shares in respect of performance shares granted under the program that ended on December 31, 2022, on February 21, 2023, the scheduled distribution date. Common shares in respect of performance share awards under the programs ending on December 31, 2023 and December 31, 2024, will be finally determined and distributed in 2024 and 2025, respectively, under the terms of those programs. The estimated aggregate value of the performance shares is $3,040,632, based on a price of $82.86 per common share, the closing price of Eversource’s common shares on November 30, 2022.

DIRECTOR COMPENSATION

The CL&P Board of Directors consists of seven directors: Gregory B. Butler, Penelope M. Conner, Chandler J. Howard, Patrick J. McGrath, John M. Moreira, Ian G. Nicholson and Werner J. Schweiger. Messrs. Howard, McGrath and Nicholson are independent, non-employee directors, who were elected to the CL&P Board of Directors on June 1, 2022, in accordance with the previously noted settlement agreement with PURA, and receive cash compensation of $50,000 per year for service on the CL&P Board as noted below. All other CL&P directors are executive officers of Eversource Energy. None of CL&P’s executive directors who are NEOs receive specific compensation for their service as directors and are compensated for all services provided to Eversource Energy and its subsidiaries, including CL&P. Ms. Conner is not an Eversource Energy NEO, but like all other CL&P directors who are also Eversource executive officers, she receives no specific compensation for her service as a director and is compensated for all services provided to Eversource Energy and its subsidiaries, including CL&P.

The table below sets forth all compensation paid to or accrued by each non-employee Director.

Director	Fees Earned or Paid in Cash ($) (1)	Total ($)
Chandler J. Howard	29,167	29,167
Patrick J. McGrath	29,167	29,167
Ian G. Nicholson	29,167	29,167

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(1)    Director compensation for non-employee CL&P directors consists of cash compensation of $50,000 per year, paid quarterly. Compensation for 2022 was pro-rated, as all of the non-employee directors were elected to the CL&P Board effective June 1, 2022.

PAY RATIO

Eversource's Chief Executive Officer to median employee pay ratio is calculated pursuant to the requirements of Item 402(u) of Regulation S-K. Eversource identifies a new median employee each year. For 2022, Eversource identified the median employee by reviewing the 2022 total cash compensation of all full-time employees, excluding Eversource’s Chief Executive Officer, who were employed by Eversource and its subsidiaries on December 31, 2022. In Eversource's assessment of median employee compensation, pay was annualized for those employees who commenced work during 2022. Otherwise, no assumptions, adjustments, or estimates were made with respect to total cash compensation, and the compensation for any full-time employees who were not employed by Eversource at the end of 2022 was not annualized. Eversource believes the use of total cash compensation for all employees is a consistently applied compensation measure, as Eversource does not widely distribute annual equity awards to employees.

After identifying the median employee based on total cash compensation, Eversource calculated the annual total compensation for such employee using the same methodology used for its Named Executive Officers as set forth in the 2022 Summary Compensation Table.

Mr. Nolan had 2022 total compensation of $12,959,134. Eversource’s median employee’s annual total compensation for 2022 was $136,254. Eversource’s 2022 Chief Executive Officer to median employee pay ratio is 95 to 1.

EXHIBIT A

Adjusted Earnings (Non-GAAP)

We use Adjusted Earnings (non-GAAP) and its per share impact as our principal financial measure of operating performance because management believes it best reflects our baseline operating performance and provides additional and useful information in analyzing historical and future performance of our business and for planning and forecasting of future periods.

Adjusted Earnings (non-GAAP) is defined as Net Income Attributable to Common Shareholders, excluding the following adjustments: (1) the Columbia Gas acquisition and related transition costs in 2022, 2021 and 2020; (2) charges in 2021 and 2022 related to the acquisition and transition of New England Service Company and Torrington Water Company; (3) charges in 2022 related to the strategic review of our offshore wind investments; and (4) charges in 2021 at The Connecticut Light and Power Company (CL&P) related to a settlement agreement that included credits to customers, funding of various customer assistance initiatives, and a storm performance penalty imposed on CL&P by the Connecticut Public Utilities Regulatory Authority. We believe the impacts of the CL&P settlement agreement and the storm performance penalty imposed on CL&P by PURA, the Columbia Gas acquisition and transition costs, and charges related to the water companies’ acquisition and transition, and the offshore wind strategic review costs are not indicative of our ongoing costs and performance.

With respect to the 2022 EPS performance goal, the Compensation Committee discussed this goal at length at both its December 2022 and February 2023 meetings. The Committee first noted 2022 adjusted earnings to be $4.09 per share, a 6% growth over 2021, substantially above the projected average industry growth of 4.9%. Following those discussions, the Compensation Committee determined that it would assess the earnings per share goal based on Adjusted Earnings. The Compensation Committee considered the fact that the costs of the Columbia Gas asset acquisition and integrations, water companies’ acquisition and transition costs, and the offshore wind strategic review costs, which were for 2022 to be the costs excluded in the calculation of Adjusted Earnings, were appropriate to be excluded. The integration of Columbia Gas was the culmination of a timely significant strategic opportunity for the Company and its customers, completed in an accelerated timeframe, under budget, with constructive regulatory outcomes; the acquisition of additional water company assets is helping to further grow the water delivery business; and the strategic review of our offshore wind investment and associated costs will enable the Company to execute the best outcome relating to this substantial investment.

This non-GAAP financial measure should not be considered as an alternative to reported Net Income Attributable to Common Shareholders or EPS determined in accordance with GAAP as indicators of operating performance.

Adjusted Earnings and EPS Reconciliation
	For the Years Ended December 31,
	2022				2021				2020
(Millions of Dollars, Except Per Share Amounts)	Amount		Per Share		Amount		Per Share		Amount		Per Share
Net Income Attributable to Common Shareholders (GAAP)	$	1,404.9	$	4.05	$	1,220.5	$	3.54	$	1,205.2	$	3.55
Adjustments (after-tax) to reconcile to Adjusted Earnings:
CL&P Settlement Agreement Impacting Costs	—		—		86.1		0.25		—		—
Columbia Gas Acquisition Transition Costs, Water Company acquisition costs and Strategic Review Costs	15.0		0.04		23.6		0.07		32.1		0.09
Adjusted Earnings (Non-GAAP)	$	1,419.9	$	4.09	$	1,330.2	$	3.86	$	1,237.3	$	3.64

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Item 12.    Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Eversource Energy

In addition to the information below under "Securities Authorized for Issuance Under Equity Compensation Plans," incorporated herein by reference is the information contained in the sections "Common Share Ownership of Certain Beneficial Owners" and "Common Share Ownership of Trustees and Management" of Eversource Energy's definitive proxy statement for solicitation of proxies, expected to be filed with the SEC on or about March 24, 2023.

NSTAR ELECTRIC and PSNH

Certain information required by this Item 12 has been omitted for NSTAR Electric and PSNH pursuant to Instruction I(2)(c) to Form 10-K, Omission of Information by Certain Wholly-Owned Subsidiaries.

CL&P

COMMON SHARE OWNERSHIP OF DIRECTORS AND MANAGEMENT

Eversource Energy owns 100 percent of the outstanding common stock of CL&P.  The table below shows the number of Eversource Energy common shares beneficially owned as of February 15, 2023, by each of CL&P's directors and each Named Executive Officer of CL&P, as well as the number of Eversource Energy common shares beneficially owned by all of CL&P's directors and executive officers as a group.  The table also includes information about restricted share units and deferred shares credited to the accounts of CL&P's directors and executive officers under certain compensation and benefit plans.  No equity securities of CL&P are owned by any of the Trustees, directors or executive officers of Eversource Energy or CL&P.

Name of Beneficial Owner	Amount and Nature of Beneficial Ownership (1)(2)(3)		Percent of Class
Werner J. Schweiger, Chairman and Chief Executive Officer, and a director of CL&P	228,152	(4)	*
John M. Moreira, Executive Vice President, Chief Financial Officer and Treasurer, and a director of CL&P	21,993		*
Gregory B. Butler, Executive Vice President and General Counsel, and a director of CL&P	91,034		*
Christine M. Carmody, Executive Vice President-Human Resources and Information Technology of Eversource Energy	52,765		*
James W. Hunt, III, Executive Vice President-Corporate Relations and Sustainability and Secretary of Eversource Energy	22,410		*
Joseph R. Nolan, Jr., Chairman of the Board, President and Chief Executive Officer of Eversource Energy	163,205		*
Philip J. Lembo, Former Executive Vice President and Chief Financial Officer of CL&P	87,044	(5)	*
Penelope M. Conner, Executive Vice President-Customer Experience and Energy Strategy of Eversource Energy, and a director of CL&P	22,111		*
Chandler J. Howard, a director of CL&P	—		*
Patrick J. McGrath, a director of CL&P	1		*
Ian G. Nicholson, a director of CL&P	—		*
All directors and executive officers as a group (13 persons)	719,799	(6)	*

*    Less than 1 percent of Eversource Energy common shares outstanding.

1.    The persons named in the table have sole voting and investment power with respect to all shares beneficially owned by each of them, except as noted below.

2.    Includes restricted share units, deferred restricted share units and/or deferred shares, including dividend equivalents, as to which none of the individuals has voting or investment power, and phantom shares held by executive officers who participate in a deferred compensation plan as follows: Mr. Schweiger: 103,738 shares; Mr. Moreira: 7,868 shares; Mr. Butler: 12,721 shares; Ms. Carmody: 10,270 shares; Mr. Hunt: 8,999 shares; Mr. Nolan: 112,314 shares; Mr. Lembo: 10,347 shares; and Ms. Conner: 17,731 shares.

3.    Includes shares held as units in the 401(k) Plan invested in the Eversource Energy Common Shares Fund over which the holder has sole voting and investment power as follows: Mr. Schweiger: 570 shares; Mr. Moreira: 5,344 shares; Mr. Butler: 7,115 shares; Ms. Carmody: 5,600 shares; Mr. Hunt: 1,633 shares; Mr. Nolan: 21,512 shares; Mr. Lembo: 421 shares; and Ms. Conner: 432 shares.

4.    Includes 1,346 shares held in a trust of which Mr. Schweiger is the trustee and beneficiary; 437 shares in a trust of which Mr. Schweiger’s spouse is the trustee and beneficiary; 1,352 shares held by Mr. Schweiger’s spouse in a custodial account for grandchild #1; and 500 shares held by Mr. Schweiger’s spouse in a custodial account for grandchild #2.

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5.    Includes 590 shares held by Mr. Lembo in a custodial account for his grandchild.

6.    Includes 302,133 unissued shares (see Note 2) and 42,793 shares held as units in the 401(k) Plan (see Note 3).

SECURITIES AUTHORIZED FOR ISSUANCE UNDER EQUITY COMPENSATION PLANS

The following table sets forth the number of Eversource Energy common shares issuable under Eversource Energy equity compensation plans, as well as their weighted exercise price, as of December 31, 2022, in accordance with the rules of the SEC:

Plan Category	Number of securities to be issued upon exercise of outstanding options, warrants and rights (1)	Weighted-average exercise price of outstanding options, warrants and rights (2)	Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (1))
Equity compensation plans approved by security holders	1,177,024	$—	903,183
Equity compensation plans not approved by security holders (3)	—	—	—
Total	1,177,024	$—	903,183

(1)    Includes 629,734 common shares for distribution in respect of restricted share units, and 547,290 performance shares issuable at target, all pursuant to the terms of our Incentive Plan.

(2)    The weighted-average exercise price does not take into account restricted share units or performance shares, which have no exercise price.

(3)    Securities set forth in this table are authorized for issuance under compensation plans that have been approved by shareholders of Eversource Energy.

Item 13.    Certain Relationships and Related Transactions, and Director Independence

Eversource Energy

Incorporated herein by reference is the information contained in the sections captioned "Trustee Independence" and "Related Person Transactions" of Eversource Energy's definitive proxy statement for solicitation of proxies, expected to be filed with the SEC on or about March 24, 2023.

NSTAR ELECTRIC and PSNH

Certain information required by this Item 13 has been omitted for NSTAR Electric and PSNH pursuant to Instruction I(2)(c) to Form 10-K, Omission of Information by Certain Wholly-Owned Subsidiaries.

CL&P

Eversource Energy's Code of Ethics for Senior Financial Officers applies to the Senior Financial Officers (Chief Executive Officer, Chief Financial Officer and Controller) of Eversource Energy, CL&P and certain other Eversource Energy subsidiaries.  Under the Code, one's position as a Senior Financial Officer in the company may not be used to improperly benefit such officer or his or her family or friends.  Under the Code, specific activities that may be considered conflicts of interest include, but are not limited to, directly or indirectly acquiring or retaining a significant financial interest in an organization that is a customer, vendor or competitor, or that seeks to do business with the company; serving, without proper safeguards, as an officer or director of, or working or rendering services for an organization that is a customer, vendor or competitor, or that seeks to do business with the company. Waivers of the provisions of the Code of Ethics for Trustees, executive officers or directors must be approved by Eversource Energy's Board of Trustees.  Any such waivers will be disclosed pursuant to legal requirements.

Eversource Energy's Code of Conduct, which applies to all Trustees, directors, officers and employees of Eversource Energy and its subsidiaries, including CL&P, contains a Conflict of Interest Policy that requires all such individuals to disclose any potential conflicts of interest.  Such individuals are expected to discuss their particular situations with management to ensure appropriate steps are in place to avoid a conflict of interest.  All disclosures must be reviewed and approved by management to ensure a particular situation does not adversely impact the individual's primary job and role.

Eversource Energy's Related Persons Transactions Policy is administered by the Corporate Governance Committee of Eversource Energy's Board of Trustees.  The Policy generally defines a "Related Persons Transaction" as any transaction or series of transactions in which (i) Eversource Energy or a subsidiary is a participant, (ii) the aggregate amount involved exceeds $120,000 and (iii) any "Related Persons" has a direct or indirect material interest.  A "Related Persons" is defined as any Trustee or nominee for Trustee, any executive officer, any shareholder owning more than 5 percent of Eversource Energy's total outstanding shares, and any immediate family member of any such person.  Management submits to the Corporate Governance Committee for consideration any Related Persons Transaction into which Eversource Energy or a subsidiary proposes to enter.  The Corporate Governance Committee recommends to the Eversource Energy Board of Trustees for approval only those transactions that are in Eversource Energy's best interests.  If management causes the company to enter into a Related Persons Transaction prior to approval by the Corporate Governance Committee, the transaction will be subject to ratification by the Eversource Energy Board of Trustees.  If the Eversource

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Energy Board of Trustees determines not to ratify the transaction, then management will make all reasonable efforts to cancel or annul such transaction.

Each of Mr. Butler, Ms. Conner, and Messrs. Moreira and Schweiger is a director of CL&P and an employee of Eversource Service. Messrs. Howard, McGrath and Nicholson are non-employee directors of CL&P. The Board of Directors elected the three independent directors in 2022 in accordance with the previously noted PURA settlement agreement. CL&P defines independent director as one who does not have any material relationship with the Company, which it determines using the same guidelines as are used by the Eversource Energy Board of Trustees in determining Board members independence. These guidelines are available on the Eversource Energy website at www.eversource.com/content/general/about/investors/corporate-governance/board-independence-guidelines.

Item 14.    Principal Accountant Fees and Services

Eversource Energy

Incorporated herein by reference is the information contained in the section "Relationship with Independent Auditors" of Eversource Energy's definitive proxy statement for solicitation of proxies, expected to be filed with the SEC on or about March 24, 2023.

CL&P, NSTAR ELECTRIC and PSNH

Pre-Approval of Services Provided by Principal Auditors

None of CL&P, NSTAR Electric and PSNH is subject to the audit committee requirements of the SEC, the national securities exchanges or the national securities associations.  CL&P, NSTAR Electric and PSNH obtain audit services from the independent auditor engaged by the Audit Committee of Eversource Energy's Board of Trustees.  Eversource Energy's Audit Committee has established policies and procedures regarding the pre-approval of services provided by the principal auditors.  Those policies and procedures delegate pre-approval of services to the Eversource Energy Audit Committee Chair provided that such offices are held by Trustees who are "independent" within the meaning of the Sarbanes-Oxley Act of 2002 and that all such pre-approvals are presented to the Eversource Energy Audit Committee at the next regularly scheduled meeting of the Committee.

The following relates to fees and services for the entire Eversource Energy system, including Eversource Energy, CL&P, NSTAR Electric and PSNH.

Fees Billed By Principal Independent Registered Public Accounting Firm

The aggregate fees billed to the Company and its subsidiaries by Deloitte & Touche LLP, the member firms of Deloitte Touche Tohmatsu, and their respective affiliates (collectively, the Deloitte Entities), for the years ended December 31, 2022 and 2021 totaled $7,029,422 and $6,013,205, respectively. In addition, affiliates of Deloitte & Touche LLP as noted below provide other accounting services to the Company.

Audit and Non-Audit Fees	2022		2021
Audit Fees (1)	$	5,323,600	$	4,883,791
Audit Related Fees (2)	1,542,000		918,500
Tax Fees (3)	—		20,000
All Other Fees (4)	163,822		190,914
TOTAL	$	7,029,422	$	6,013,205

(1) Audit fees in 2022 and 2021 consisted of fees related to the audits of financial statements of Eversource Energy and its subsidiaries in the Annual Report on Form 10-K, reviews of financial statements in the Combined Quarterly reports on Form 10-Q of Eversource Energy and its subsidiaries, consultations with management, regulatory and compliance filings, system conversion quality assurance, out of pocket expenses, and audits of internal controls over financial reporting as of December 31, 2022 and 2021. Audit fees in 2021 also included the audits of pension plan financial statements in connection with the acquisition of CMA.

(2) Audit Related Fees were incurred for procedures performed in the ordinary course of business in support of certain regulatory filings, comfort letters, consents, and other costs related to registration statements and financials for the years ended December 31, 2022 and 2021. Audit Related Fees for the year ended 2022 also included Eversource’s ATM equity offering program.

(3) The tax service fees for the period ended December 31, 2021 were incurred for procedures performed in the ordinary course of business in support of certain federal rules in 2021. There were no tax fees rendered and no tax fees billed for the year ended December 31, 2022.

(4) All Other Fees for the period ended December 31, 2022 related to a system pre-implementation control review, an executive training program and an annual license for access to an accounting standards research tool. All Other Fees for the period ended December 31, 2021 included an advisory benchmarking project related to operations at a newly acquired business as well as an annual license for access to an accounting standards research tool.

175

The Audit Committee pre-approves all auditing services and permitted audit-related or other services (including the fees and terms thereof) to be performed for us by our independent registered public accounting firm, subject to the de minimis exceptions for non-audit services described in Section 10A(i)(1)(B) of the Securities Exchange Act of 1934, which are approved by the Audit Committee prior to the completion of the audit. The Audit Committee may form and delegate its authority to subcommittees consisting of one or more members when appropriate, including the authority to grant pre-approvals of audit and permitted non-audit services, provided that decisions of such subcommittees to grant pre-approvals are presented to the full Audit Committee at its next scheduled meeting.  During 2022, all services described above were pre-approved by the Audit Committee or its Chair.  

The Audit Committee has considered whether the provision by the Deloitte Entities of the non-audit services described above was allowed under Rule 2-01(c)(4) of Regulation S-X and was compatible with maintaining the independence of the registered public accountants and has concluded that the Deloitte Entities were and are independent of us in all respects.

176

PART IV

Item 15.    Exhibits and Financial Statement Schedules

(a)	1.	Financial Statements:
			The financial statements filed as part of this Annual Report on Form 10-K are set forth under Item 8, "Financial Statements and Supplementary Data."
	2.	Schedules
		I.	Financial Information of Registrant:
			Eversource Energy (Parent) Balance Sheets as of December 31, 2022 and 2021	S-1
			Eversource Energy (Parent) Statements of Income for the Years Ended December 31, 2022, 2021 and 2020	S-2
			Eversource Energy (Parent) Statements of Comprehensive Income for the Years Ended December 31, 2022, 2021 and 2020	S-2
			Eversource Energy (Parent) Statements of Cash Flows for the Years Ended December 31, 2022, 2021 and 2020	S-3
		II.	Valuation and Qualifying Accounts and Reserves for Eversource, CL&P, NSTAR Electric and PSNH for 2022, 2021 and 2020	S-4
			All other schedules of the companies for which inclusion is required in the applicable regulations of the SEC are permitted to be omitted under the related instructions or are not applicable, and therefore have been omitted.
	3.		Exhibit Index	E-1

Item 16.     Form 10-K Summary

Not applicable.

177

SCHEDULE I

EVERSOURCE ENERGY (PARENT)

FINANCIAL INFORMATION OF REGISTRANT

BALANCE SHEETS

AS OF DECEMBER 31, 2022 AND 2021

(Thousands of Dollars)

	2022		2021
ASSETS
Current Assets:
Cash	$	971	$	175
Accounts Receivable from Subsidiaries	53,338		43,403
Notes Receivable from Subsidiaries	1,074,800		1,245,900
Prepayments and Other Current Assets	23,597		11,974
Total Current Assets	1,152,706		1,301,452
Deferred Debits and Other Assets:
Investments in Subsidiary Companies, at Equity	18,379,840		16,108,190
Notes Receivable from Subsidiaries	1,896,500		1,001,000
Accumulated Deferred Income Taxes	—		17,409
Goodwill	3,852,524		3,852,524
Other Long-Term Assets	108,867		101,710
Total Deferred Debits and Other Assets	24,237,731		21,080,833
Total Assets	$	25,390,437	$	22,382,285
LIABILITIES AND CAPITALIZATION
Current Liabilities:
Notes Payable	$	1,442,200	$	1,342,950
Long-Term Debt - Current Portion	1,207,047		767,681
Accounts Payable to Subsidiaries	33,530		37,609
Other Current Liabilities	112,807		87,745
Total Current Liabilities	2,795,584		2,235,985
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	8,498		—
Other Long-Term Liabilities	140,393		150,616
Total Deferred Credits and Other Liabilities	148,891		150,616
Long-Term Debt	6,972,804		5,395,840
Common Shareholders' Equity:
Common Shares	1,799,920		1,789,092
Capital Surplus, Paid in	8,401,731		8,098,514
Retained Earnings	5,527,153		5,005,391
Accumulated Other Comprehensive Loss	(39,421)		(42,275)
Treasury Stock	(216,225)		(250,878)
Common Shareholders' Equity	15,473,158		14,599,844
Total Liabilities and Capitalization	$	25,390,437	$	22,382,285

See the Combined Notes to Financial Statements in this Annual Report on Form 10-K for a description of significant accounting matters related to Eversource parent, including Eversource common shares information as described in Note 18, "Common Shares," material obligations and guarantees as described in Note 13, "Commitments and Contingencies," and debt agreements as described in Note 8, "Short-Term Debt," and Note 9, "Long-Term Debt."

S-1

SCHEDULE I

EVERSOURCE ENERGY (PARENT)

FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF INCOME

FOR THE YEARS ENDED DECEMBER 31, 2022, 2021 AND 2020

(Thousands of Dollars, Except Share Information)

	2022		2021		2020
Operating Revenues	$	—	$	—	$	—
Operating Expenses:
Other	26,708		43,048		28,645
Operating Loss	(26,708)		(43,048)		(28,645)
Interest Expense	237,773		163,613		160,887
Other Income, Net:
Equity in Earnings of Subsidiaries	1,565,474		1,345,199		1,309,630
Other, Net	79,383		47,802		38,546
Other Income, Net	1,644,857		1,393,001		1,348,176
Income Before Income Tax Benefit	1,380,376		1,186,340		1,158,644
Income Tax Benefit	(24,499)		(34,187)		(46,523)
Net Income	$	1,404,875	$	1,220,527	$	1,205,167
Basic Earnings per Common Share	$	4.05	$	3.55	$	3.56
Diluted Earnings per Common Share	$	4.05	$	3.54	$	3.55
Weighted Average Common Shares Outstanding:
Basic	346,783,444		343,972,926		338,836,147
Diluted	347,246,768		344,631,056		339,847,062

STATEMENTS OF COMPREHENSIVE INCOME

(Thousands of Dollars)	2022		2021		2020
Net Income	$	1,404,875	$	1,220,527	$	1,205,167
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	20		972		1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)		(671)		342
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	4,470		33,835		(13,290)
Other Comprehensive Income/(Loss), Net of Tax	2,854		34,136		(11,352)
Comprehensive Income	$	1,407,729	$	1,254,663	$	1,193,815

See the Combined Notes to Financial Statements in this Annual Report on Form 10-K for a description of significant accounting matters related to Eversource parent, including Eversource common shares information as described in Note 18, "Common Shares," material obligations and guarantees as described in Note 13, "Commitments and Contingencies," and debt agreements as described in Note 8, "Short-Term Debt," and Note 9, "Long-Term Debt."

S-2

SCHEDULE I

EVERSOURCE ENERGY (PARENT)

FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF CASH FLOWS

FOR THE YEARS ENDED DECEMBER 31, 2022, 2021 and 2020

(Thousands of Dollars)

	2022		2021		2020
Operating Activities:
Net Income	$	1,404,875	$	1,220,527	$	1,205,167
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Equity in Earnings of Subsidiaries	(1,565,474)		(1,345,199)		(1,309,630)
Cash Dividends Received from Subsidiaries	855,600		1,037,100		485,800
Deferred Income Taxes	25,823		20,293		(4,667)
Other	26,455		36,910		39,940
Changes in Current Assets and Liabilities:
Accounts Receivables from Subsidiaries	(9,935)		(3,758)		(14,575)
Taxes Receivable/Accrued, Net	(21,627)		(19,455)		35,300
Accounts Payable to Subsidiaries	(4,079)		19,185		14,091
Other Current Assets and Liabilities, Net	35,090		8,144		21,284
Net Cash Flows Provided by Operating Activities	746,728		973,747		472,710
Investing Activities:
Capital Contributions to Subsidiaries	(1,499,300)		(1,033,000)		(1,899,340)
Return of Capital from Subsidiaries	12,000		178,800		80,000
Increase in Notes Receivable from Subsidiaries	(724,400)		(140,200)		(264,300)
Other Investing Activities	(1,289)		(3,196)		(367)
Net Cash Flows Used in Investing Activities	(2,212,989)		(997,596)		(2,084,007)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	197,058		—		928,992
Cash Dividends on Common Shares	(860,033)		(805,439)		(744,665)
Issuance of Long-Term Debt	2,800,000		1,000,000		1,550,000
Retirement of Long-Term Debt	(750,000)		(450,000)		—
Increase/(Decrease) in Notes Payable	99,250		288,625		(170,545)
Other Financing Activities	(19,193)		(9,545)		46,480
Net Cash Flows Provided by Financing Activities	1,467,082		23,641		1,610,262
Net Increase/(Decrease) in Cash and Restricted Cash	821		(208)		(1,035)
Cash and Restricted Cash - Beginning of Year	226		434		1,469
Cash and Restricted Cash - End of Year	$	1,047	$	226	$	434
Supplemental Cash Flow Information:
Cash Paid/(Received) During the Year for:
Interest	$	215,053	$	164,568	$	140,694
Income Taxes	$	(20,992)	$	(51,277)	$	(43,158)

See the Combined Notes to Financial Statements in this Annual Report on Form 10-K for a description of significant accounting matters related to Eversource parent, including Eversource common shares information as described in Note 18, "Common Shares," material obligations and guarantees as described in Note 13, "Commitments and Contingencies," and debt agreements as described in Note 8, "Short-Term Debt," and Note 9, "Long-Term Debt."

S-3

SCHEDULE II

EVERSOURCE ENERGY AND SUBSIDIARIES

VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

FOR THE YEARS ENDED DECEMBER 31, 2022, 2021 AND 2020

(Thousands of Dollars)

Column A		Column B		Column C				Column D		Column E
				Additions
				(1)		(2)
Description:		Balance as of Beginning of Year		Charged to Costs and Expenses		Charged to Other Accounts - Describe (a)		Deductions -Describe (b)		Balance as of End of Year
Eversource:
Reserves Deducted from Assets -
Reserves for Uncollectible Accounts:
	2022	$	417,406	$	61,876	$	112,533	$	105,518	$	486,297
	2021	358,851		60,886		110,572		112,903		417,406
	2020	224,821		53,461		145,005		64,436		358,851
CL&P:
Reserves Deducted from Assets -
Reserves for Uncollectible Accounts:
	2022	$	181,319	$	15,578	$	59,485	$	31,062	$	225,320
	2021	157,447		13,495		57,779		47,402		181,319
	2020	97,348		12,882		71,223		24,006		157,447
NSTAR Electric:
Reserves Deducted from Assets -
Reserves for Uncollectible Accounts:
	2022	$	97,005	$	21,550	$	12,412	$	36,009	$	94,958
	2021	91,583		16,649		20,064		31,291		97,005
	2020	75,406		15,293		23,424		22,540		91,583
PSNH:
Reserves Deducted from Assets -
Reserves for Uncollectible Accounts:
	2022	$	24,331	$	9,211	$	2,539	$	6,845	$	29,236
	2021	17,157		13,113		3,135		9,074		24,331
	2020	10,497		5,164		7,692		6,196		17,157

(a)    Amounts relate to uncollectible accounts receivables reserved for that are not charged to bad debt expense. CL&P, NSTAR Electric, NSTAR Gas, EGMA and Yankee Gas are allowed to recover in rates, amounts associated with certain uncollectible hardship accounts receivable. CL&P, NSTAR Electric, PSNH, NSTAR Gas and EGMA are also allowed to recover uncollectible energy supply costs through regulatory tracking mechanisms. Amounts in this column in 2020 also include a $24.2 million increase due to the CMA asset acquisition on October 9, 2020 at Eversource, and an increase due to the adoption of the credit loss accounting standard in 2020 of $23.8 million at Eversource, $22.2 million at CL&P, $0.3 million at PSNH, and a decrease of $1.3 million at NSTAR Electric.

(b)    Amounts written off, net of recoveries.  

S-4

EXHIBIT INDEX

Each document described below is incorporated by reference by the registrant(s) listed to the files identified, unless designated with a (*), which exhibits are filed herewith.  Management contracts and compensation plans or arrangements are designated with a (+).

Exhibit

Number        Description

3.    Articles of Incorporation and By-Laws

(A)    Eversource Energy

3.1    Declaration of Trust of Eversource Energy, as amended through May 3, 2017 (Exhibit 3.1, Eversource Form 10-Q filed on May 5, 2017)

(B)    The Connecticut Light and Power Company

3.1    Amended and Restated Certificate of Incorporation (Exhibit 3(i), CL&P Current Report on Form 8-K filed on January 9, 2012, File No. 000-00404)

3.2    By-laws of CL&P, as amended and restated effective September 29, 2014 (Exhibit 3.1, CL&P Current Report on Form 8-K filed October 2, 2014, File No. 000-00404)

(C)    NSTAR Electric Company

3.1    Restated Articles of Organization of NSTAR Electric Company, fka Boston Edison Company (Exhibit 3.1, NSTAR Electric Form 10-Q for the Quarter Ended June 30, 1994 filed August 12, 1994, File No. 001-02301)

3.2    Bylaws of NSTAR Electric Company, as amended and restated effective September 29, 2014 (Exhibit 3.1, NSTAR Electric Current Report on Form 8-K filed October 2, 2014, File No. 000-02301)

(D)    Public Service Company of New Hampshire

3.1    Articles of Incorporation, as amended to May 16, 1991 (Exhibit 3.3.1, 1993 PSNH Form 10-K filed March 25, 1994, File No. 001-06392)

3.2    By-laws of PSNH, as in effect June 27, 2008 (Exhibit 3, PSNH Form 10-Q for the Quarter Ended June 30, 2008 filed August 7, 2008, File No. 001-06392)

4.    Instruments defining the rights of security holders, including indentures

(A)    Eversource Energy

4.1    Indenture between Eversource Energy and The Bank of New York as Trustee dated as of April 1, 2002 (Exhibit A-3, Eversource Energy 35-CERT filed April 16, 2002, File No. 070-09535)

4.1.1    Fifth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of May 1, 2013, relating to $450 million of Senior Notes, Series F, due 2023 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed May 16, 2013, File No. 001-05324)

4.1.2    Sixth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of January 1, 2015, relating to $300 million of Senior Notes, Series H, due 2025 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed January 21, 2015, File No. 001-05324)

4.1.3    Seventh Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of March 7, 2016, relating to $250 million of Senior Notes, Series J, due 2026 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed March 15, 2016, File No. 001-05324)

4.1.4    Ninth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of October 1, 2017, relating to $450 million of Senior Notes, Series K, due 2022 and $450 million of Senior Notes, Series L, due 2024 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed October 12, 2017, File No. 001-05324)

E-1

4.1.5    Tenth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of January 1, 2018, relating to $450 million of Senior Notes, Series M, Due 2028 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed January 12, 2018, File No. 001-05324)

4.1.6    Eleventh Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of December 1, 2018, relating to $400 million of Senior Notes, Series N, Due 2023 and $500 million of Senior Notes, Series O, Due 2029 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed December 18, 2018, File No. 001-05324)

4.1.7    Twelfth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of January 1, 2020, relating to $650 million of Senior Notes, Series P, Due 2050 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed January 16, 2020, File No. 001-05324)

4.1.8    Thirteenth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of August 1, 2020, relating to $300 million aggregate principal amount of Senior Notes, Series Q, Due 2025 and $600 million aggregate principal amount of Senior Notes, Series R, Due 2030 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed August 20, 2020, File No. 001-05324)

4.1.9    Fourteenth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of March 1, 2021, relating to $350 million aggregate principal amount of Senior Notes, Series S, Due 2031 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed March 16, 2021, File No. 001-05324)

4.1.10    Fifteenth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of August 1, 2021, relating to $350 million aggregate principal amount of Floating Rate Senior Notes, Series T and $300 million aggregate principal amount of Senior Notes, Series U, Due 2026 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed August 13, 2021, File No. 001-05324)

4.1.11    Sixteenth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of February 1, 2022, relating to $650 million aggregate principal amount of Senior Notes, Series V, Due 2027 and $650 million aggregate principal amount of Senior Notes, Series W, Due 2032 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed February 25, 2022, File No. 001-05324)

4.1.12    Seventeenth Supplemental Indenture between Eversource Energy and The Bank of New York Trust Company N.A., as Trustee, dated as of June 1, 2022, relating to $900 million aggregate principal amount of Senior Notes, Series X, Due 2024 and $600 million aggregate principal amount of Senior Notes, Series Y, Due 2027 (Exhibit 4.1, Eversource Energy Current Report on Form 8-K filed June 27, 2022, File No. 001-05324)

4.2    Eversource Energy Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934 (Exhibit 4.3, Eversource Energy Annual Report on Form 10-K filed February 27, 2020, File No. 001-05324)

(B)    The Connecticut Light and Power Company

4.1    Indenture of Mortgage and Deed of Trust between CL&P and Bankers Trust Company, Trustee, dated as of May 1, 1921 (Composite including all twenty-four amendments to May 1, 1967) (Exhibit 4.1, 2017 Eversource 10-K filed on February 26, 2018)

4.1.1    Series D Supplemental Indentures to the Composite May 1, 1921 Indenture of Mortgage and Deed of Trust between CL&P and Bankers Trust Company, dated as of October 1, 1994 (Exhibit 4.2.16, 1994 CL&P Form 10-K filed March 27, 1995, File No. 001-11419)

4.1.2    Series B Supplemental Indenture between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of September 1, 2004 (Exhibit 99.5, CL&P Current Report on Form 8-K filed September 22, 2004, File No. 000-00404)

4.2    Composite Indenture of Mortgage and Deed of Trust between CL&P and Deutsche Bank Trust Company Americas f/k/a Bankers Trust Company, dated as of May 1, 1921, as amended and supplemented by seventy-three supplemental mortgages to and including Supplemental Mortgage dated as of April 1, 2005 (Exhibit 99.5, CL&P Current Report on Form 8-K filed April 13, 2005, File No. 000-00404)

E-2

4.2.1    Supplemental Indenture (2005 Series B Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of April 1, 2005 (Exhibit 99.2, CL&P Current Report on Form 8-K filed April 13, 2005, File No. 000-00404)

4.2.2    Supplemental Indenture (2006 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of June 1, 2006 (Exhibit 99.2, CL&P Current Report on Form 8-K filed June 7, 2006, File No. 000-00404)

4.2.3    Supplemental Indenture (2007 Series B Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of March 1, 2007 (Exhibit 99.2, CL&P Current Report on Form 8-K filed March 29, 2007, File No. 000-00404)

4.2.4    Supplemental Indenture (2007 Series D Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of September 1, 2007 (Exhibit 4, CL&P Current Report on Form 8-K filed September 19, 2007, File No. 000-00404)

4.2.5    Supplemental Indenture (2013 Series A Bond) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of January 1, 2013 (Exhibit 4.1, CL&P Current Report on Form 8-K filed January 22, 2013, File No. 000-00404)

4.2.6    Supplemental Indenture (2014 Series A Bond) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of April 1, 2014 (Exhibit 4.1, CL&P Current Report on Form 8-K filed April 29, 2014, File No. 000-00404)

4.2.7    Supplemental Indenture (2015 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of May 1, 2015 (Exhibit 4.1, CL&P Current Report on Form 8-K filed May 26, 2015, File No. 000-00404)

4.2.8    Supplemental Indenture (2015 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of November 1, 2015 (Exhibit 4.1, CL&P Current Report on Form 8-K filed December 4, 2015, File No. 000-00404)

4.2.9    Supplemental Indenture (2017 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of March 1, 2017 (Exhibit 4.1, CL&P Current Report on Form 8-K filed on March 16, 2017, File No. 000-00404)

4.2.10    Supplemental Indenture (2014 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of August 1, 2017 (Exhibit 4.1, CL&P Current Report on Form 8-K filed August 23, 2017, File No. 000-00404)

4.2.11    Supplemental Indenture (2018 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of March 1, 2018 (Exhibit 4.1, CL&P Current Report on Form 8-K filed April 2, 2018, File No. 000-00404)

4.2.12    Supplemental Indenture (2018 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of March 1, 2019 (Exhibit 4.1, CL&P Current Report on Form 8-K filed on April 4, 2019, File No. 000-00404)

4.2.13    Supplemental Indenture (2017 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of September 1, 2019 (Exhibit 4.1, CL&P Current Report on Form 8-K filed on September 23, 2019, File No. 000-00404)

4.2.14    Supplemental Indenture (2020 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of December 1, 2020 (Exhibit 4.1, CL&P Current Report on Form 8-K filed on December 4, 2020, File No. 000-00404)

4.2.15    Supplemental Indenture (2021 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of June 1, 2021 (Exhibit 4.1, CL&P Current Report on Form 8-K filed on July 2, 2021, File No. 000-00404)

4.2.16    Supplemental Indenture (2023 Series A Bonds) between CL&P and Deutsche Bank Trust Company Americas, as Trustee dated as of January 1, 2023 (Exhibit 4.1, CL&P Current Report on Form 8-K filed on January 10, 2023, File No. 000-00404)

E-3

4.3    CL&P Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934 (Exhibit 4.4, Eversource Energy Annual Report on Form 10-K filed February 27, 2020, File No. 001-05324)

(C) NSTAR Electric Company

4.1    Indenture between Boston Edison Company and the Bank of New York (as successor to Bank of Montreal Trust Company) (Exhibit 4.1, 2017 Eversource Form 10-K filed February 26, 2018)

4.1.1    A Form of 5.75% Debenture Due March 15, 2036 (Exhibit 99.2, Boston Edison Company Current Report on Form 8‑K filed March 17, 2006, File No. 001-02301)

4.1.2    A Form of 5.50% Debenture Due March 15, 2040 (Exhibit 99.2, NSTAR Electric Company Current Report on Form 8‑K filed March 15, 2010, File No. 001-02301)

4.1.3    A Form of 4.40% Debenture Due 2044 (Exhibit 4, NSTAR Electric Company Current Report on Form 8-K filed March 13, 2014, File No. 001-02301)

4.1.4    A Form of 3.25% Debenture due 2025 (Exhibit 4, NSTAR Electric Company Current Report on Form 8-K filed on November 20, 2015, File No. 001-02301)

4.1.5    A Form of 2.70% Debenture due 2026 (Exhibit 4, NSTAR Electric Company Current Report on Form 8-K filed on May, 31, 2016, File No. 001-02301)

4.1.6    Form of 3.20% Debenture due May 15, 2027 (Exhibit 4, NSTAR Electric Company Current Report on Form 8-K/A filed on October 12, 2017 File No. 001-02301)

4.1.7    Form of 3.25% Debenture due May 15, 2029 (Exhibit 4, NSTAR Electric Company Current Report on Form 8-K filed on May 23, 2019, File No. 001-02301)

4.1.8    Form of 3.95% Debenture due April 1, 2030 (Exhibit 4, NSTAR Electric Company Current Report on Form 8-K filed on March 26, 2020, File No. 001-02301)

4.1.9 Form of 3.10% Debenture due June 1, 2051 (Exhibit 4, NSTAR Electric Company Current Report on Form 8-K filed on June 2, 2021, File No. 001-02301)

4.1.10 Form of 1.95% Debenture due August 15, 2031 (Exhibit 4.1, NSTAR Electric Company Current Report on Form 8-K filed on August 23, 2021, File No. 001-02301)

4.1.11    Form of 4.55% Debenture due June 1, 2052 (Exhibit 4.1, NSTAR Electric Company Current Report on Form 8-K filed on May 17, 2022, File No. 001-02301)

4.1.12    Form of 4.95% Debenture due September 15, 2052 (Exhibit 4.1, NSTAR Electric Company Current Report on Form 8-K filed on September 15, 2022, 2021, File No. 001-02301)

4.2    Second Amended and Restated Credit Agreement, dated as of October 15, 2021, by and among NSTAR Electric Company and the Banks named therein, pursuant to which Barclays Bank PLC serves as Administrative Agent and Swing Line Lender (Exhibit 10.13, 2021 Eversource Form 10-K filed on February 17, 2022)

4.2.1    First Amendment to Second Amended and Restated Credit Agreement and Extension Agreement, dated October 17, 2022, by and between NSTAR Electric Company and the Banks named therein, pursuant to which Barclays Bank PLC serves as Administrative Agent and Swing Line Lender (Exhibit 4.1, Eversource Form 10-Q filed on November 4, 2022)

4.3    Indenture between NSTAR Electric Company, as successor to Western Massachusetts Electric Company (WMECO), and The Bank of New York, as Trustee, dated as of September 1, 2003 (Exhibit 99.2, WMECO Current Report on Form 8-K filed October 8, 2003, File No. 000-07624)

4.3.1    Second Supplemental Indenture between NSTAR Electric Company, as successor to WMECO, and The Bank of New York, as Trustee dated as of September 1, 2004 (Exhibit 4.1, WMECO Current Report on Form 8-K filed September 27, 2004, File No. 000-07624)

4.3.2    Fourth Supplemental Indenture between NSTAR Electric Company, as successor to WMECO, and The Bank of New York Trust, as Trustee, dated as of August 1, 2007 (Exhibit 4.1, WMECO Current Report on Form 8-K filed August 20, 2007, File No. 000-07624)

E-4

4.3.3    Seventh Supplemental Indenture between NSTAR Electric Company, as successor to WMECO, and The Bank of New York Trust Company, N.A., as Trustee, dated as of November 1, 2013 (Exhibit 4.1, WMECO Current Report on Form 8-K filed November 21, 2013, File No. 000-07624)

4.3.4    Eighth Supplemental Indenture between NSTAR Electric Company, as successor to WMECO, and The Bank of New York Trust Company, N.A., as Trustee, dated as of June 1, 2016 (Exhibit 4.1, WMECO Current Report on Form 8-K filed June 29, 2016, File No. 000-07624)

4.4    NSTAR Electric Company Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934 (Exhibit 4.4, Eversource Energy Annual Report on Form 10-K filed February 27, 2020, File No. 001-05324)

(D)    Public Service Company of New Hampshire

4.1    First Mortgage Indenture between PSNH and First Fidelity Bank, National Association, New Jersey, now First Union National Bank, Trustee, dated as of August 15, 1978 (Composite including all amendments effective June 1, 2011) (included as Exhibit C to the Eighteenth Supplemental Indenture filed as Exhibit 4.1 to PSNH Current Report on Form 8-K filed June 2, 2011, File No. 001-06392)

4.1.1    Fourteenth Supplemental Indenture between PSNH and Wachovia Bank, National Association successor to First Union National Bank, as successor to First Fidelity Bank, National Association, as Trustee dated as of October 1, 2005 (Exhibit 99.2, PSNH Current Report on Form 8-K filed October 6, 2005, File No. 001-06392)

4.1.2    Twentieth Supplemental Indenture, between PSNH and U.S. Bank National Association, as Trustee dated as of November 1, 2013 (Exhibit 4.1, PSNH Current Report on Form 8-K filed November 20, 2013 (File No. 001-06392)

4.1.3    Twenty-First Supplemental Indenture, between PSNH and U.S. Bank National Association, as Trustee dated as of October 1, 2014 (Exhibit 4.1, PSNH Current Report on Form 8-K filed October 17, 2014 (File No. 001-06392)

4.1.4    Twenty-Second Supplemental Indenture, between PSNH and U.S. Bank National Association, as Trustee dated as of June 1, 2019 (Exhibit 4.1, PSNH Current Report on Form 8-K filed on July 3, 2019 (File No. 001-06392)

4.1.5    Twenty-Third Supplemental Indenture, between PSNH and U.S. Bank National Association, as Trustee dated as of August 1, 2020 (Exhibit 4.1, PSNH Current Report on Form 8-K filed on August 31, 2020 (File No. 001-06392)

4.1.6 Twenty-Fourth Supplemental Indenture, between PSNH and U.S. Bank National Association, as Trustee dated as of June 1, 2021 (Exhibit 4.1, PSNH Current Report on Form 8-K filed on June 21, 2021 (File No. 001-06392)

4.1.7    Twenty-Fifth Supplemental Indenture, between PSNH and U.S. Bank Trust Company, National Association, as Trustee dated as of January 1, 2023 (Exhibit 4.1, PSNH Current Report on Form 8-K filed on January 11, 2023 (File No. 001-06392)

4.2    Series A Loan and Trust Agreement among Business Finance Authority of the State of New Hampshire and PSNH and State Street Bank and Trust Company, as Trustee (Tax Exempt Pollution Control Bonds) dated as of October 1, 2001 (Exhibit 4.3.4, 2001 Eversource Energy Form 10-K filed March 22, 2002, File No. 001-05324)    

(F)    Eversource Energy, The Connecticut Light and Power Company and Public Service Company of New Hampshire

4.1    Second Amended and Restated Credit Agreement, dated as of October 15, 2021, by and among Eversource, Aquarion Water Company of Connecticut, NSTAR Gas, CL&P, PSNH, Yankee Gas and EGMA and the Banks named therein, pursuant to which Bank of America, N.A. serves as Administrative Agent and Swing Line Lender (Exhibit 10.12, 2021 Eversource Form 10-K filed on February 17, 2022)

4.1.1    First Amendment to Second Amended and Restated Credit Agreement and Extension Agreement, dated October 17, 2022, by and among Eversource, Aquarion Water Company of Connecticut, NSTAR Gas, CL&P, PSNH, Yankee Gas and EGMA and the Banks named therein, pursuant to which Bank of America, N.A. serves as Administrative Agent and Swing Line Lender (Exhibit 4, Eversource Form 10-Q filed on November 4, 2022)

10.    Material Contracts

E-5

(A)    Eversource Energy

10.1    Lease between The Rocky River Realty Company and Eversource Energy Service Company, dated as of July 1, 2008 (Exhibit 10.1, 2017 Eversource Form 10-K filed on February 26, 2018)

*+10.2         Eversource Energy Board of Trustees’ Compensation Arrangement Summary 

+10.3    Eversource Supplemental Executive Retirement Program effective as of January 1, 2015 (Exhibit 10.5, 2015 Eversource Energy Form 10-K filed February 26, 2016, File No. 001-05324)

+10.4    Eversource Energy Deferred Compensation Plan for Executives effective as of January 1, 2014 (Exhibit 10.6, 2015 Eversource Energy Form 10-K filed February 26, 2016, File No. 001-05324)

    +10.4.1    Amendment No 1 to the Eversource Deferred Compensation Plan effective February 7, 2018 (Exhibit 10.6.1, Eversource Energy Annual Report on Form 10-K filed February 27, 2020, File No. 001-05324)

+10.5    NSTAR Excess Benefit Plan, effective August 25, 1999 (Exhibit 10.1 1999 NSTAR Form 10-K/A filed September 29, 2000, File No. 001-14768)

+10.5.1    NSTAR Excess Benefit Plan, incorporating the NSTAR 409A Excess Benefit Plan, as amended and restated effective January 1, 2008, dated December 24, 2008 (Exhibit 10.1.1 2008 NSTAR Form 10-K filed February 9, 2009, File No. 001-14768)

+10.6    Amended and Restated Change in Control Agreement by and between Joseph R. Nolan, Jr. and NSTAR, dated November 15, 2007 (Exhibit 10.13, 2007 NSTAR Form 10-K filed February 11, 2008, File No. 001-14768)

+10.7    Amended and Restated Change in Control Agreement by and between Werner J. Schweiger and NSTAR, dated November 15, 2007 (Exhibit 10.14, 2007 NSTAR Form 10-K filed February 11, 2008, File No. 001-14768)

+10.8    Amended and Restated Change in Control Agreement by and between Senior Vice President and NSTAR, dated November 15, 2007 (Exhibit 10.15, 2007 NSTAR Form 10-K filed February 11, 2008, File No. 001-14768)

+10.9    Master Trust Agreement between NSTAR and State Street Bank and Trust Company (Rabbi Trust), effective August 25, 1999 (Exhibit 10.5, NSTAR Form 10-Q for the Quarter Ended September 30, 2000 filed November 14, 2000, File No. 001-14768)

+10.10    Currently effective Change in Control Agreement between NSTAR’s Vice Presidents and NSTAR (in form) (Exhibit 10.17, 2009 NSTAR Form 10-K filed February 25, 2010, File No. 001-14768)

(B)    Eversource Energy, The Connecticut Light and Power Company, NSTAR Electric Company and Public Service Company of New Hampshire

10.1    Amended and Restated Form of Service Contract between each of Eversource Energy, CL&P, NSTAR Electric Company and Eversource Energy Service Company dated as of January 1, 2014. (Exhibit 10.1, Eversource Energy Form 10-K filed on February 25, 2014, File No. 001-05324)

10.2    Transmission Operating Agreement between the Initial Participating Transmission Owners, Additional Participating Transmission Owners and ISO New England, Inc. dated as of February 1, 2005 (Exhibit 10.29, 2004 Eversource Energy Form 10-K filed March 17, 2005, File No. 001-05324)

10.2.1    Rate Design and Funds Disbursement Agreement among the Initial Participating Transmission Owners, Additional Participating Transmission Owners and ISO New England, Inc., effective June 30, 2006 (Exhibit 10.22.1, 2006 Eversource Energy Form 10-K filed March 1, 2007, File No. 001-05324)

10.3    Eversource Energy's Third Amended and Restated Tax Allocation Agreement dated as of April 10, 2012, (Exhibit 10.1 Eversource Energy Form 10-Q for Quarter Ended June 30, 2012 filed August 7, 2012, File No. 001-05324)

+10.4    Amended and Restated Incentive Plan Effective January 1, 2009 (Exhibit 10.3, Eversource Energy Form 10-Q for the Quarter Ended September 30, 2008 filed November 10, 2008, File No. 001-05324)

+10.5    2018 Eversource Energy Incentive Plan (Exhibit 99.2, Eversource Energy Current Report on Form 8-K dated May 3, 2018)

+10.6    Trust under Supplemental Executive Retirement Plan dated May 2, 1994 (Exhibit 10.33, 2002 Eversource Energy Form 10-K filed March 21, 2003, File No. 001-05324)

E-6

+10.6.1    First Amendment to Trust Under Supplemental Executive Retirement Plan, effective as of December 10, 2002 (Exhibit 10 (B) 10.19.1, 2003 Eversource Energy Form 10-K filed March 12, 2004, File No. 001-05324)

+10.6.2    Second Amendment to Trust Under Supplemental Executive Retirement Plan, effective as of November 12, 2008 (Exhibit 10.12.2, 2008 Eversource Energy Form 10-K filed February 27, 2009, File No. 001-05324)

+10.7    Special Severance Program for Officers of Eversource Energy Companies as of January 1, 2009 (Exhibit 10.2 Eversource Energy Form 10-Q for Quarter Ended September 30, 2008 filed November 10, 2008, File No. 001-05324)

+10.8    Amended and Restated Employment Agreement with Gregory B. Butler, effective January 1, 2009 (Exhibit 10.7, 2008 Eversource Energy 2010 Form 10-K filed February 27, 2009, File No. 001-05324)

(C)    Eversource Energy, The Connecticut Light and Power Company, Public Service Company of New Hampshire and NSTAR Electric Company

10.1    Eversource Energy Service Company Transmission and Ancillary Service Wholesale Revenue Allocation Methodology among The Connecticut Light and Power Company, NSTAR Electric Company, Public Service Company of New Hampshire, Holyoke Water Power Company and Holyoke Power and Electric Company Trustee dated as of January 1, 2008 (Exhibit 10.1, Eversource Energy Form 10-Q for the Quarter Ended March 31, 2008 filed May 9, 2008, File No. 001-05324)

*21.    Subsidiaries of the Registrant

*23.    Consents of Independent Registered Public Accounting Firm

*31.    Rule 13a - 14(a)/15 d - 14(a) Certifications

(A)    Eversource Energy

31    Certification by the Chief Executive Officer of Eversource Energy pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

31.1    Certification by the Chief Financial Officer of Eversource Energy pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

(B)    The Connecticut Light and Power Company

31    Certification by the Chairman of CL&P pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

31.1    Certification by the Chief Financial Officer of CL&P pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

(C)    NSTAR Electric Company

31    Certification by the Chairman of NSTAR Electric Company pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

31.1    Certification by the Chief Financial Officer of NSTAR Electric Company pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

(D)    Public Service Company of New Hampshire

31    Certification by the Chairman of PSNH pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

31.1    Certification by the Chief Financial Officer of PSNH pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

*32    18 U.S.C. Section 1350 Certifications

(A)    Eversource Energy

32    Certification by the Chief Executive Officer and Chief Financial Officer of Eversource Energy pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

E-7

(B)    The Connecticut Light and Power Company

32    Certification by the Chairman and the Chief Financial Officer of CL&P pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(C)    NSTAR Electric Company

32    Certification by the Chairman and the Chief Financial Officer of NSTAR Electric Company pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(D)    Public Service Company of New Hampshire

32    Certification by the Chairman and the Chief Financial Officer of PSNH pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

*101.INS    Inline XBRL Instance Document - the instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document

*101.SCH    Inline XBRL Taxonomy Extension Schema

*101.CAL    Inline XBRL Taxonomy Extension Calculation

*101.DEF    Inline XBRL Taxonomy Extension Definition

*101.LAB    Inline XBRL Taxonomy Extension Labels

*101.PRE    Inline XBRL Taxonomy Extension Presentation

*104    The cover page from the Annual Report on Form 10-K for the year ended December 31, 2022, formatted in Inline XBRL

E-8

EVERSOURCE ENERGY

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		EVERSOURCE ENERGY
February 15, 2023	By:	/s/	John M. Moreira
			John M. Moreira
			Executive Vice President, Chief Financial Officer and Treasurer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints Gregory B. Butler and John M. Moreira and each of them, his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

	Signature	Title	Date
/s/	Joseph R. Nolan, Jr.	Chairman of the Board, President and	February 15, 2023
	Joseph R. Nolan, Jr.	Chief Executive Officer
		(Principal Executive Officer)
/s/	John M. Moreira	Executive Vice President, Chief Financial Officer	February 15, 2023
	John M. Moreira	and Treasurer
		(Principal Financial Officer and Principal Accounting Officer)
/s/	Cotton M. Cleveland	Trustee	February 15, 2023
	Cotton M. Cleveland
/s/	James S. DiStasio	Trustee	February 15, 2023
	James S. DiStasio
/s/	Francis A. Doyle	Trustee	February 15, 2023
	Francis A. Doyle

E-9

	Signature	Title	Date
/s/	Linda Dorcena Forry	Trustee	February 15, 2023
	Linda Dorcena Forry
/s/	Gregory M. Jones	Trustee	February 15, 2023
	Gregory M. Jones
/s/	Loretta D. Keane	Trustee	February 15, 2023
	Loretta D. Keane
/s/	John Y. Kim	Trustee	February 15, 2023
	John Y. Kim
/s/	Kenneth R. Leibler	Trustee	February 15, 2023
	Kenneth R. Leibler
/s/	David H. Long	Trustee	February 15, 2023
	David H. Long
/s/	William C. Van Faasen	Trustee	February 15, 2023
	William C. Van Faasen
/s/	Frederica M. Williams	Trustee	February 15, 2023
	Frederica M. Williams

E-10

THE CONNECTICUT LIGHT AND POWER COMPANY

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	THE CONNECTICUT LIGHT AND POWER COMPANY
February 15, 2023	By:	/s/	John M. Moreira
			John M. Moreira
			Executive Vice President, Chief Financial Officer and Treasurer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints Gregory B. Butler and John M. Moreira and each of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

	Signature	Title	Date
/s/	Werner J. Schweiger	Chairman and Chief Executive Officer	February 15, 2023
	Werner J. Schweiger	and a Director
/s/	John M. Moreira	Executive Vice President, Chief Financial Officer	February 15, 2023
	John M. Moreira	and Treasurer and a Director
		(Principal Financial Officer and Principal Accounting Officer)
/s/	Gregory B. Butler	Executive Vice President and General Counsel	February 15, 2023
	Gregory B. Butler	and a Director
/s/	Penelope M. Conner	Director	February 15, 2023
	Penelope M. Conner
/s/	Chandler J. Howard	Director	February 15, 2023
	Chandler J. Howard
/s/	Patrick J. McGrath	Director	February 15, 2023
	Patrick J. McGrath
/s/	Ian G. Nicholson	Director	February 15, 2023
	Ian G. Nicholson

E-11

NSTAR ELECTRIC COMPANY

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	NSTAR ELECTRIC COMPANY
February 15, 2023	By:	/s/	John M. Moreira
			John M. Moreira
			Executive Vice President, Chief Financial Officer and Treasurer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints Gregory B. Butler and John M. Moreira and each of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

	Signature	Title	Date
/s/	Joseph R. Nolan, Jr.	Chairman and a Director	February 15, 2023
	Joseph R. Nolan, Jr.	(Principal Executive Officer)
/s/	Werner J. Schweiger	Chief Executive Officer and a Director	February 15, 2023
	Werner J. Schweiger
/s/	John M. Moreira	Executive Vice President, Chief Financial Officer	February 15, 2023
	John M. Moreira	and Treasurer and a Director
		(Principal Financial Officer and Principal Accounting Officer)
/s/	Gregory B. Butler	Executive Vice President and General Counsel	February 15, 2023
	Gregory B. Butler	and a Director

E-12

PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE
February 15, 2023	By:	/s/	John M. Moreira
			John M. Moreira
			Executive Vice President, Chief Financial Officer and Treasurer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints Gregory B. Butler and John M. Moreira and each of them, his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and in his name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done, as fully to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

	Signature	Title	Date
/s/	Joseph R. Nolan, Jr.	Chairman and a Director	February 15, 2023
	Joseph R. Nolan, Jr.	(Principal Executive Officer)
/s/	Werner J. Schweiger	Chief Executive Officer and a Director	February 15, 2023
	Werner J. Schweiger
/s/	John M. Moreira	Executive Vice President, Chief Financial Officer	February 15, 2023
	John M. Moreira	and Treasurer and a Director
		(Principal Financial Officer and Principal Accounting Officer)
/s/	Gregory B. Butler	Executive Vice President and General Counsel	February 15, 2023
	Gregory B. Butler	and a Director

E-13

EX-31

Exhibit 31

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph R. Nolan, Jr., certify that:

1.I have reviewed this Annual Report on Form 10-K of Eversource Energy (the registrant);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 15, 2023

/s/	Joseph R. Nolan, Jr.
	Joseph R. Nolan, Jr.
	Chairman of the Board, President and Chief Executive Officer
	(Principal Executive Officer)

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, John M. Moreira, certify that:

1.I have reviewed this Annual Report on Form 10-K of Eversource Energy (the registrant);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 15, 2023

/s/	John M. Moreira
	John M. Moreira
	Executive Vice President, Chief Financial Officer and Treasurer
	(Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Annual Report on Form 10-K of Eversource Energy (the registrant) for the period ending December 31, 2022 as filed with the Securities and Exchange Commission (the Report), we, Joseph R. Nolan, Jr., Chairman of the Board, President and Chief Executive Officer of the registrant, and John M. Moreira, Executive Vice President, Chief Financial Officer and Treasurer of the registrant, certify, pursuant to 18 U.S.C. Sec. 1350, as adopted pursuant to Sec. 906 of the Sarbanes-Oxley Act of 2002, that:

1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the registrant.

/s/	Joseph R. Nolan, Jr.
	Joseph R. Nolan, Jr.
	Chairman of the Board, President and Chief Executive Officer

/s/	John M. Moreira
	John M. Moreira
	Executive Vice President, Chief Financial Officer and Treasurer

Date:  February 15, 2023

EX-31

Exhibit 31

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Werner J. Schweiger, certify that:

1.I have reviewed this Annual Report on Form 10-K of The Connecticut Light and Power Company (the registrant);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 15, 2023

/s/	Werner J. Schweiger
	Werner J. Schweiger
	Chairman and Chief Executive Officer
	(Principal Executive Officer)

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, John M. Moreira, certify that:

1.I have reviewed this Annual Report on Form 10-K of The Connecticut Light and Power Company (the registrant);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 15, 2023

/s/	John M. Moreira
	John M. Moreira
	Executive Vice President, Chief Financial Officer and Treasurer
	(Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Annual Report on Form 10-K of The Connecticut Light and Power Company (the registrant) for the period ending December 31, 2022 as filed with the Securities and Exchange Commission (the Report), we, Werner J. Schweiger, Chairman and Chief Executive Officer of the registrant, and John M. Moreira, Executive Vice President, Chief Financial Officer and Treasurer of the registrant, certify, pursuant to 18 U.S.C. Sec. 1350, as adopted pursuant to Sec. 906 of the Sarbanes-Oxley Act of 2002, that:

1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the registrant.

/s/	Werner J. Schweiger
	Werner J. Schweiger
	Chairman and Chief Executive Officer

/s/	John M. Moreira
	John M. Moreira
	Executive Vice President, Chief Financial Officer and Treasurer

Date:  February 15, 2023

EX-31

Exhibit 31

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph R. Nolan, Jr., certify that:

1.I have reviewed this Annual Report on Form 10-K of NSTAR Electric Company (the registrant);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 15, 2023

/s/	Joseph R. Nolan, Jr.
	Joseph R. Nolan, Jr.
	Chairman
	(Principal Executive Officer)

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, John M. Moreira, certify that:

1.I have reviewed this Annual Report on Form 10-K of NSTAR Electric Company (the registrant);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 15, 2023

/s/	John M. Moreira
	John M. Moreira
	Executive Vice President, Chief Financial Officer and Treasurer
	(Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Annual Report on Form 10-K of NSTAR Electric Company (the registrant) for the period ending December 31, 2022 as filed with the Securities and Exchange Commission (the Report), we, Joseph R. Nolan, Jr., Chairman of the registrant, and John M. Moreira, Executive Vice President, Chief Financial Officer and Treasurer of the registrant, certify, pursuant to 18 U.S.C. Sec. 1350, as adopted pursuant to Sec. 906 of the Sarbanes-Oxley Act of 2002, that:

1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the registrant.

/s/	Joseph R. Nolan, Jr.
	Joseph R. Nolan, Jr.
	Chairman

/s/	John M. Moreira
	John M. Moreira
	Executive Vice President, Chief Financial Officer and Treasurer

Date:  February 15, 2023

EX-31

Exhibit 31

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Joseph R. Nolan, Jr., certify that:

1.I have reviewed this Annual Report on Form 10-K of Public Service Company of New Hampshire (the registrant);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 15, 2023

/s/	Joseph R. Nolan, Jr.
	Joseph R. Nolan, Jr.
	Chairman
	(Principal Executive Officer)

EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO

SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, John M. Moreira, certify that:

1.I have reviewed this Annual Report on Form 10-K of Public Service Company of New Hampshire (the registrant);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d)Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  February 15, 2023

/s/	John M. Moreira
	John M. Moreira
	Executive Vice President, Chief Financial Officer and Treasurer
	(Principal Financial Officer)

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with this Annual Report on Form 10-K of Public Service Company of New Hampshire (the registrant) for the period ending December 31, 2022 as filed with the Securities and Exchange Commission (the Report), we, Joseph R. Nolan, Jr., Chairman of the registrant, and John M. Moreira, Executive Vice President, Chief Financial Officer and Treasurer of the registrant, certify, pursuant to 18 U.S.C. Sec. 1350, as adopted pursuant to Sec. 906 of the Sarbanes-Oxley Act of 2002, that:

1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the registrant.

/s/	Joseph R. Nolan, Jr.
	Joseph R. Nolan, Jr.
	Chairman

/s/	John M. Moreira
	John M. Moreira
	Executive Vice President, Chief Financial Officer and Treasurer

Date:  February 15, 2023

EX-10.2

Exhibit 10.2

SUMMARY OF TRUSTEE COMPENSATION ARRANGEMENTS

The Compensation Committee periodically reviews the compensation of our non-employee Trustees and, when it deems appropriate and upon consultation with the Committee’s independent compensation consultant, recommends adjustments to be approved by the Board of Trustees. The Compensation Committee recommends to the Board compensation for the Trustees based on competitive market practices for both the total value of compensation and the allocation of cash and equity. The Committee uses data obtained from similarly sized utility and general industry companies as guidelines for setting Trustee compensation. The level of Trustee compensation recommended by the Committee and approved by the Board enables us to attract Trustees who have a broad range of backgrounds and experiences.

Each non-employee Trustee serving on January 1 receives a grant under the Company’s Incentive Plan, effective on the tenth business day of such year, consisting of the number of restricted stock units (RSUs) resulting from dividing $165,000 by the average closing price of our common shares as reported on the NYSE for the 10 trading days immediately preceding such date and rounding the resulting amount to the nearest whole RSU.RSUs generally vest on the next business day following the grant. Non-employee Trustees may elect distribution of up to 100 percent of the common shares issuable in respect of such RSUs immediately upon vesting of their RSU grant, subject to satisfaction of the Trustee share ownership guidelines. The distribution of all common shares entitled to be received upon vesting, but not distributed immediately, is deferred until the tenth business day of January of the year following retirement from Board service.Any individual who is elected to serve as a Trustee after January 1 of any calendar year receives an RSU grant prorated from the date of such election and granted on the first business day of the month following such election.

2022 Trustee Compensation

Compensation Element	Amount
Annual Cash Retainer	$120,000
Annual Stock Retainer	$165,000
Board and Committee Attendance Fees	None
Annual Lead Trustee Retainer	$35,000
Annual Committee Chair Retainer	$25,000 Audit Committee $20,000 Compensation Committee $15,000 Governance, Environmental and Social Responsibility Committee $15,000 Finance Committee

Annual cash retainers of $120,000 per Trustee, additional Committee Chair and Lead Trustee cash retainers and annual RSU grants for service on the Board for 2022 based on the amounts above were paid as described in this section. Pay Governance LLC provided the Compensation Committee with a review of competitive market practices and compensation in 2022. As a result, effective January 1, 2023, the Board determined that an additional retainer of $7,500 be paid to the Trustees who were appointed to the newly established positions of Vice Chair of the Audit Committee and Vice Chair of the Finance Committee.

The share ownership guidelines set forth in the Company’s Corporate Governance Guidelines require each Trustee to attain ownership of a number of common shares equal to a market value of at least five-times the then current annual cash compensation retainer for service on the Board. Trustees are required to hold all shares awarded as annual stock compensation retainers until the guidelines have been met.

Prior to the year earned, each Trustee may irrevocably elect to defer receipt of all or a portion of their cash compensation. Deferred funds are credited with deemed earnings on various deemed investments as permitted by the Company's Deferred Compensation Plan. Deferred cash compensation is payable either in a lump sum or in installments in accordance with the Trustee’s prior election. There were no above-market earnings in deferred compensation value during 2022, as the terms of the Deferred Compensation Plan provide for market-based investments, including Company common shares.

Our Incentive Plan places a limit on the amount of total annual compensation that can be paid to any Trustee. When applicable, we pay travel-related expenses for spouses of Trustees who attend Board functions, but we do not pay tax gross-up payments in connection with any taxes on such expenses, nor do we pay pension benefits to our non-employee Trustees.

EX-21

Exhibit 21

Subsidiaries of the Registrants as of February 15, 2023(1)

	State of Incorporation
Eversource Energy (a Massachusetts business trust) (2)	MA
The Connecticut Light and Power Company (2) (3)	CT
Connecticut Yankee Atomic Power Company (4)	CT
Eversource Energy Service Company	CT
Eversource Energy Transmission Ventures, Inc.	CT
Eversource Gas Transmission LLC	MA
Eversource Gas Transmission II LLC	MA
Eversource LNG Service Company LLC	MA
Northern Pass Transmission LLC	NH
Renewable Properties, Inc.	NH
Eversource Holdco Corporation	MA
Eversource Investment LLC	MA
Eversource Investment Service Company LLC	MA
Aquarion Company	DE
Aquarion Water Company	CT
Abenaki Water Co., Inc.	NH
Aquarion Water Company of Connecticut	CT
Aquarion Water Company of Massachusetts, Inc.	MA
Aquarion Water Capital of Massachusetts, Inc.	DE
Aquarion Water Company of New Hampshire, Inc.	NH
The Torrington Water Company	CT
Homeowner Safety Valve Company	DE
New England Service Company	CT
HWP Company	MA
North Atlantic Energy Corporation	NH
North Atlantic Energy Service Corporation	NH
Northeast Nuclear Energy Company	CT
NSTAR Electric Company (2) (3)	MA
Harbor Electric Energy Company	MA
Public Service Company of New Hampshire (2) (3)	NH
Properties, Inc.	NH
PSNH Funding LLC 3	DE
The Rocky River Realty Company	CT
Yankee Atomic Electric Company (4)	MA
Yankee Energy System, Inc.	CT
Eversource Gas Company of Massachusetts (3)	MA
Hopkinton LNG Corp.	MA
NSTAR Gas Company (3)	MA
Yankee Gas Services Company (3)	CT

(1) The names of some of our subsidiaries which, if considered in the aggregate as a single subsidiary, would not constitute a “significant subsidiary,” have been omitted in accordance with Item 601(b)(21)(ii) of Regulation S-K.

(2) SEC Registrant.

(3) This entity is doing business as Eversource Energy.

(4) For The Connecticut Light and Power Company, NSTAR Electric Company and     Public Service Company of New Hampshire, investments in Connecticut Yankee Atomic Power Company and Yankee Atomic Electric Company are accounted for under the equity method.

EX-23

Exhibit 23

CONSENTS OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-264278 and 333-254993 on Form S-3 and Registration Statement Nos. 333-142724, 333-181258, 333-224605, and 333-231116 on Form S-8 of our reports dated February 15, 2023, relating to the consolidated financial statements and the financial statement schedules of Eversource Energy and subsidiaries, and the effectiveness of Eversource Energy and subsidiaries' internal control over financial reporting, appearing in this Annual Report on Form 10-K of Eversource Energy for the year ended December 31, 2022.

We also consent to the incorporation by reference in Registration Statement No. 333-264278-03 on Form S-3 of our report dated February 15, 2023, relating to the financial statements and the financial statement schedule of The Connecticut Light and Power Company appearing in this Annual Report on Form 10-K of The Connecticut Light and Power Company for the year ended December 31, 2022.

We also consent to the incorporation by reference in Registration Statement No. 333-264278-02 on Form S-3 of our report dated February 15, 2023, relating to the consolidated financial statements and the financial statement schedule of NSTAR Electric Company and subsidiary appearing in this Annual Report on Form 10-K of NSTAR Electric Company for the year ended December 31, 2022.

We also consent to the incorporation by reference in Registration Statement No. 333-264278-01 on Form S-3 of our report dated February 15, 2023, relating to the consolidated financial statements and the financial statement schedule of Public Service Company of New Hampshire and subsidiary appearing in this Annual Report on Form 10-K of Public Service Company of New Hampshire for the year ended December 31, 2022.

/s/ Deloitte & Touche LLP

Hartford, Connecticut

February 15, 2023

XML

COVER PAGE - USD ($)

12 Months Ended

Dec. 31, 2022

Jan. 31, 2023

Jun. 30, 2022

Entity Information [Line Items]

Document Type

10-K

Document Annual Report

true

Document Period End Date

Dec. 31, 2022

Current Fiscal Year End Date

--12-31

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 Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Entity Filer Category

Large Accelerated Filer

Entity Small Business

false

Entity Emerging Growth Company

false

ICFR Auditor Attestation Flag

true

Entity Shell Company

false

Entity Public Float

$ 29,211,450,455

Entity Common Stock, Shares Outstanding

348,483,425

Documents Incorporated by Reference

Documents Incorporated by Reference

Portions of the Eversource Energy and Subsidiaries 2021 combined Annual Report on Form 10-K and portions of the Proxy Statement relating to the Annual Meeting of Shareholders to be held on May 3, 2023, are incorporated by reference into Parts II and III of this Report.

Entity Central Index Key

0000072741

Document Fiscal Year Focus

2022

Document Fiscal Period Focus

FY

Amendment Flag

false

The Connecticut Light and Power Company

Entity Information [Line Items]

Current Fiscal Year End Date

--12-31

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 Small Business

false

Entity Emerging Growth Company

false

Entity Shell Company

false

Entity Common Stock, Shares Outstanding

6,035,205

Entity Central Index Key

0000023426

NSTAR Electric Company

Entity Information [Line Items]

Current Fiscal Year End Date

--12-31

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 Small Business

false

Entity Emerging Growth Company

false

Entity Shell Company

false

Entity Common Stock, Shares Outstanding

200

Entity Central Index Key

0000013372

Public Service Company of New Hampshire

Entity Information [Line Items]

Current Fiscal Year End Date

--12-31

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 Small Business

false

Entity Emerging Growth Company

false

Entity Shell Company

false

Entity Common Stock, Shares Outstanding

301

Entity Central Index Key

0000315256

XML

Audit Information	12 Months Ended
	Dec. 31, 2022
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Hartford, Connecticut
CL&P
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Hartford, Connecticut
NSTAR Electric
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Hartford, Connecticut
PSNH
Auditor [Line Items]
Auditor Firm ID	34
Auditor Name	Deloitte & Touche LLP
Auditor Location	Hartford, Connecticut

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 47,597	$ 66,773
Cash Equivalents	327,006	0
Receivables, Net (net of allowance for uncollectible accounts)	1,517,138	1,226,069
Unbilled Revenues	238,968	210,879
Materials, Supplies, Natural Gas and REC Inventory	374,395	267,547
Regulatory Assets	1,335,491	1,129,093
Prepayments and Other Current Assets	382,603	369,759
Total Current Assets	4,223,198	3,270,120
Property, Plant and Equipment, Net	36,112,820	33,377,650
Deferred Debits and Other Assets:
Regulatory Assets	4,242,794	4,586,709
Goodwill	4,522,632	4,477,269
Investments in Unconsolidated Affiliates	2,176,080	1,436,293
Prepaid Pension and PBOP	1,045,524	271,987
Marketable Securities	366,508	460,347
Other Long-Term Assets	541,344	611,769
Total Deferred Debits and Other Assets	12,894,882	11,844,374
Total Assets	53,230,900	48,492,144
Current Liabilities:
Notes Payable	1,442,200	1,505,450
Long-Term Debt – Current Portion	1,320,129	1,193,097
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	2,113,905	1,672,230
Regulatory Liabilities	890,786	602,432
Other Current Liabilities	989,053	830,620
Total Current Liabilities	6,799,283	5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,067,902	4,597,120
Regulatory Liabilities	3,930,305	3,866,251
Derivative Liabilities	143,929	235,387
Asset Retirement Obligations	502,713	500,111
Accrued Pension, SERP and PBOP	135,473	242,463
Other Long-Term Liabilities	888,081	971,080
Total Deferred Credits and Other Liabilities	10,668,403	10,412,412
Capitalization:
Long-Term Debt	19,723,994	17,023,577
Rate Reduction Bonds	410,492	453,702
Noncontrolling Interest - Preferred Stock of Subsidiaries	155,570	155,570
Common Shareholders' Equity:
Common Shares	1,799,920	1,789,092
Capital Surplus, Paid In	8,401,731	8,098,514
Retained Earnings	5,527,153	5,005,391
Accumulated Other Comprehensive Income/(Loss)	(39,421)	(42,275)
Treasury Stock	(216,225)	(250,878)
Common Shareholders' Equity	15,473,158	14,599,844
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$ 53,230,900	$ 48,492,144

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Allowance for uncollectible accounts	$ 486,297	$ 417,406	$ 358,900	$ 224,800

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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Operating Revenues	$ 12,289,336	$ 9,863,085	$ 8,904,430
Operating Expenses:
Purchased Power, Purchased Natural Gas and Transmission	5,014,074	3,372,344	2,987,840
Operations and Maintenance	1,865,328	1,739,685	1,480,252
Depreciation	1,194,246	1,103,008	981,380
Amortization	448,892	231,965	177,679
Energy Efficiency Programs	658,051	592,775	535,760
Taxes Other Than Income Taxes	910,591	829,987	752,785
Total Operating Expenses	10,091,182	7,869,764	6,915,696
Operating Income	2,198,154	1,993,321	1,988,734
Interest Expense	678,274	582,334	538,452
Other Income, Net	346,088	161,282	108,590
Income Before Income Tax Expense	1,865,968	1,572,269	1,558,872
Income Tax Expense	453,574	344,223	346,186
Net Income	1,412,394	1,228,046	1,212,686
Net Income Attributable to Noncontrolling Interests	7,519	7,519	7,519
Net Income Attributable to Common Shareholders	$ 1,404,875	$ 1,220,527	$ 1,205,167
Basic Earnings Per Common Share (in dollars per share)	$ 4.05	$ 3.55	$ 3.56
Diluted Earnings Per Common Share (in dollars per share)	$ 4.05	$ 3.54	$ 3.55
Weighted Average Common Shares Outstanding:
Basic (in shares)	346,783,444	343,972,926	338,836,147
Diluted (in shares)	347,246,768	344,631,056	339,847,062

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	20	972	1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)	(671)	342
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	4,470	33,835	(13,290)
Other Comprehensive Income/(Loss), Net of Tax	2,854	34,136	(11,352)
Comprehensive Income Attributable to Noncontrolling Interests	(7,519)	(7,519)	(7,519)
Comprehensive Income Attributable to Common Shareholders	$ 1,407,729	$ 1,254,663	$ 1,193,815

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CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Adoption of New Accounting Standard	Common Shares	Capital Surplus, Paid In	Retained Earnings	Retained Earnings Adoption of New Accounting Standard	Accumulated Other Comprehensive Income (Loss)	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2019			329,880,645
Beginning balance at Dec. 31, 2019	$ 12,629,994	$ (1,514)	$ 1,729,292	$ 7,087,768	$ 4,177,048	$ (1,514)	$ (65,059)	$ (299,055)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,212,686				1,212,686
Dividends on Common Stock	(767,500)				(767,500)
Dividends on Preferred Stock	(7,519)				(7,519)
Issuance of Common Shares (in shares)			11,960,000
Issuance of Common Shares	949,660		$ 59,800	889,860
Long-Term Incentive Plan Activity	7,890			7,890
Issuance of Treasury Shares (in shares)			1,113,378
Issuance of Treasury Shares	71,888			50,812				21,076
Capital Stock Expense	(20,667)			(20,667)
Other Comprehensive Income/(Loss), Net of Tax	(11,352)						(11,352)
Ending balance (in shares) at Dec. 31, 2020			342,954,023
Ending balance at Dec. 31, 2020	14,063,566		$ 1,789,092	8,015,663	4,613,201		(76,411)	(277,979)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,228,046				1,228,046
Dividends on Common Stock	(828,337)				(828,337)
Dividends on Preferred Stock	(7,519)				(7,519)
Long-Term Incentive Plan Activity	3,537			3,537
Issuance of Treasury Shares (in shares)			986,656
Issuance of Treasury Shares	68,364			49,913				18,451
Issuance of Treasury Shares for Acquisition (in shares)			462,517
Issuance of Treasury Shares for Acquisition	38,051			29,401				8,650
Other Comprehensive Income/(Loss), Net of Tax	$ 34,136						34,136
Ending balance (in shares) at Dec. 31, 2021	344,403,196		344,403,196
Ending balance at Dec. 31, 2021	$ 14,599,844		$ 1,789,092	8,098,514	5,005,391		(42,275)	(250,878)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,412,394				1,412,394
Dividends on Common Stock	(883,113)				(883,113)
Dividends on Preferred Stock	(7,519)				(7,519)
Issuance of Common Shares (in shares)			2,165,671
Issuance of Common Shares	199,905		$ 10,828	189,077
Long-Term Incentive Plan Activity	8,335			8,335
Issuance of Treasury Shares (in shares)			949,724
Issuance of Treasury Shares	71,172			53,822				17,350
Capital Stock Expense	(2,847)			(2,847)
Issuance of Treasury Shares for Acquisition (in shares)			925,264
Issuance of Treasury Shares for Acquisition	72,133			54,830
Other Comprehensive Income/(Loss), Net of Tax	$ 2,854						2,854
Ending balance (in shares) at Dec. 31, 2022	348,443,855		348,443,855
Ending balance at Dec. 31, 2022	$ 15,473,158		$ 1,799,920	$ 8,401,731	$ 5,527,153		$ (39,421)	$ (216,225)

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CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Dividends on Common Shares (in dollars per share)	$ 2.55	$ 2.41	$ 2.27
Par value of Common Shares (in dollars per share)	$ 5	$ 5	$ 5

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities:
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	1,194,246	1,103,008	981,380
Deferred Income Taxes	346,779	347,056	257,154
Uncollectible Expense	61,876	60,886	53,461
Pension, SERP and PBOP (Income)/Expense, Net	(160,857)	(14,693)	12,888
Pension and PBOP Contributions	(83,148)	(182,344)	(111,524)
Regulatory Under Recoveries, Net	(205,294)	(314,211)	(516,411)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	(72,041)	81,274	0
Amortization	448,892	231,965	177,679
Cost of Removal Expenditures	(303,755)	(242,130)	(148,332)
Payment of Withheld Property Taxes	(78,446)	0	0
Other	(39,192)	(64,640)	(25,957)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(470,593)	(135,505)	(351,843)
Taxes Receivable/Accrued, Net	18,358	(110,621)	43,819
Accounts Payable	377,657	(29,201)	122,567
Other Current Assets and Liabilities, Net	(45,583)	3,710	(24,995)
Net Cash Flows Provided by Operating Activities	2,401,293	1,962,600	1,682,572
Investing Activities:
Investments in Property, Plant and Equipment	(3,441,852)	(3,175,080)	(2,942,996)
Proceeds from Sales of Marketable Securities	457,612	447,893	434,124
Purchases of Marketable Securities	(424,174)	(414,980)	(401,823)
Acquisition of Assets of Columbia Gas of Massachusetts, Net of Restricted Cash	0	0	(1,113,252)
Investments in Unconsolidated Affiliates	(742,496)	(327,385)	(239,673)
Other Investing Activities	20,420	22,178	23,809
Net Cash Flows Used in Investing Activities	(4,130,490)	(3,447,374)	(4,129,275)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	197,058	0	928,992
Cash Dividends on Common Shares	(860,033)	(805,439)	(744,665)
Cash Dividends on Preferred Stock	(7,519)	(7,519)	(7,519)
(Decrease)/Increase in Notes Payable	(78,170)	256,125	13,955
Repayment of Rate Reduction Bonds	(43,210)	(43,210)	(43,210)
Issuance of Long-Term Debt	4,045,000	3,230,000	2,760,000
Retirement of Long-Term Debt	(1,175,000)	(1,142,500)	(327,236)
Other Financing Activities	(48,185)	(46,625)	14,273
Net Cash Flows Provided by Financing Activities	2,029,941	1,440,832	2,594,590
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	300,744	(43,942)	147,887
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	221,008	264,950	117,063
Cash, Cash Equivalents and Restricted Cash - End of Year	521,752	221,008	264,950
Hingham Water System
Investing Activities:
Proceeds from the Sale of Hingham Water System	$ 0	$ 0	$ 110,536

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THE CONNECTICUT LIGHT AND POWER COMPANY BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 47,597	$ 66,773
Receivables, Net (net of allowance for uncollectible accounts)	1,517,138	1,226,069
Unbilled Revenues	238,968	210,879
Materials, Supplies, Natural Gas and REC Inventory	374,395	267,547
Regulatory Assets	1,335,491	1,129,093
Prepayments and Other Current Assets	382,603	369,759
Total Current Assets	4,223,198	3,270,120
Property, Plant and Equipment, Net	36,112,820	33,377,650
Deferred Debits and Other Assets:
Regulatory Assets	4,242,794	4,586,709
Prepaid Pension	1,045,524	271,987
Other Long-Term Assets	541,344	611,769
Total Deferred Debits and Other Assets	12,894,882	11,844,374
Total Assets	53,230,900	48,492,144
Current Liabilities:
Accounts Payable	2,113,905	1,672,230
Regulatory Liabilities	890,786	602,432
Other Current Liabilities	989,053	830,620
Total Current Liabilities	6,799,283	5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,067,902	4,597,120
Regulatory Liabilities	3,930,305	3,866,251
Derivative Liabilities	143,929	235,387
Accrued Pension, SERP and PBOP	135,473	242,463
Other Long-Term Liabilities	888,081	971,080
Total Deferred Credits and Other Liabilities	10,668,403	10,412,412
Capitalization:
Long-Term Debt	19,723,994	17,023,577
Noncontrolling Interest - Preferred Stock of Subsidiaries	155,570	155,570
Common Shareholders' Equity:
Capital Surplus, Paid In	8,401,731	8,098,514
Retained Earnings	5,527,153	5,005,391
Accumulated Other Comprehensive Income/(Loss)	(39,421)	(42,275)
Common Shareholders' Equity	15,473,158	14,599,844
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	53,230,900	48,492,144
The Connecticut Light and Power Company
Current Assets:
Cash	11,312	55,804
Receivables, Net (net of allowance for uncollectible accounts)	612,052	447,774
Accounts Receivable from Affiliated Companies	46,439	43,944
Unbilled Revenues	59,363	56,787
Materials, Supplies, Natural Gas and REC Inventory	88,157	60,264
Taxes Receivable	65,785	55,223
Regulatory Assets	314,089	371,609
Prepayments and Other Current Assets	62,524	65,034
Total Current Assets	1,259,721	1,156,439
Property, Plant and Equipment, Net	11,467,024	10,803,543
Deferred Debits and Other Assets:
Regulatory Assets	1,593,693	1,713,161
Prepaid Pension	147,914	429
Other Long-Term Assets	290,444	276,084
Total Deferred Debits and Other Assets	2,032,051	1,989,674
Total Assets	14,758,796	13,949,656
Current Liabilities:
Accounts Payable	710,500	533,454
Accounts Payable to Affiliated Companies	136,277	132,578
Regulatory Liabilities	336,048	266,489
Derivative Liabilities	81,588	73,528
Other Current Liabilities	163,875	141,955
Total Current Liabilities	1,428,288	1,148,004
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,640,034	1,562,102
Regulatory Liabilities	1,263,396	1,193,259
Derivative Liabilities	143,929	235,387
Accrued Pension, SERP and PBOP	12,887	26,820
Other Long-Term Liabilities	153,194	153,004
Total Deferred Credits and Other Liabilities	3,213,440	3,170,572
Capitalization:
Long-Term Debt	4,216,488	4,215,379
Noncontrolling Interest - Preferred Stock of Subsidiaries	116,200	116,200
Common Shareholders' Equity:
Common Shares	60,352	60,352
Capital Surplus, Paid In	3,260,765	3,010,765
Retained Earnings	2,463,094	2,228,133
Accumulated Other Comprehensive Income/(Loss)	169	251
Common Shareholders' Equity	5,784,380	5,299,501
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$ 14,758,796	$ 13,949,656

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for uncollectible accounts	$ 486,297	$ 417,406	$ 358,900	$ 224,800
CL&P
Allowance for uncollectible accounts	$ 225,320	$ 181,319	$ 157,400	$ 97,300

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THE CONNECTICUT LIGHT AND POWER COMPANY STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues	$ 12,289,336	$ 9,863,085	$ 8,904,430
Operating Expenses:
Purchased Power and Transmission	5,014,074	3,372,344	2,987,840
Operations and Maintenance	1,865,328	1,739,685	1,480,252
Depreciation	1,194,246	1,103,008	981,380
Energy Efficiency Programs	658,051	592,775	535,760
Taxes Other Than Income Taxes	910,591	829,987	752,785
Total Operating Expenses	10,091,182	7,869,764	6,915,696
Operating Income	2,198,154	1,993,321	1,988,734
Interest Expense	678,274	582,334	538,452
Other Income, Net	346,088	161,282	108,590
Income Before Income Tax Expense	1,865,968	1,572,269	1,558,872
Income Tax Expense	453,574	344,223	346,186
Net Income	1,412,394	1,228,046	1,212,686
The Connecticut Light and Power Company
Operating Revenues	4,817,744	3,637,412	3,547,527
Operating Expenses:
Purchased Power and Transmission	2,110,253	1,392,969	1,369,196
Operations and Maintenance	707,162	644,175	572,897
Depreciation	355,511	338,915	320,709
Amortization of Regulatory Assets, Net	335,636	99,009	58,412
Energy Efficiency Programs	134,222	129,564	141,453
Taxes Other Than Income Taxes	384,746	363,862	344,451
Total Operating Expenses	4,027,530	2,968,494	2,807,118
Operating Income	790,214	668,918	740,409
Interest Expense	169,348	166,107	153,547
Other Income, Net	83,252	30,187	20,774
Income Before Income Tax Expense	704,118	532,998	607,636
Income Tax Expense	171,198	131,273	149,702
Net Income	$ 532,920	$ 401,725	$ 457,934

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THE CONNECTICUT LIGHT AND POWER COMPANY STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	20	972	1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)	(671)	342
Other Comprehensive Income/(Loss), Net of Tax	2,854	34,136	(11,352)
Comprehensive Income Attributable to Common Shareholders	1,407,729	1,254,663	1,193,815
The Connecticut Light and Power Company
Net Income	532,920	401,725	457,934
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	(26)	(26)	(26)
Changes in Unrealized (Losses)/Gains on Marketable Securities	(56)	(25)	12
Other Comprehensive Income/(Loss), Net of Tax	(82)	(51)	(14)
Comprehensive Income Attributable to Common Shareholders	$ 532,838	$ 401,674	$ 457,920

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THE CONNECTICUT LIGHT AND POWER COMPANY STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Adoption of New Accounting Standard	Common Stock	Capital Surplus, Paid In	Retained Earnings	Retained Earnings Adoption of New Accounting Standard	Accumulated Other Comprehensive Income (Loss)	The Connecticut Light and Power Company	The Connecticut Light and Power Company Adoption of New Accounting Standard	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 Retained Earnings Adoption of New Accounting Standard	The Connecticut Light and Power Company Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2019			329,880,645							6,035,205
Beginning balance at Dec. 31, 2019	$ 12,629,994	$ (1,514)	$ 1,729,292	$ 7,087,768	$ 4,177,048	$ (1,514)	$ (65,059)	$ 4,387,825	$ (900)	$ 60,352	$ 2,535,765	$ 1,791,392	$ (900)	$ 316
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,212,686				1,212,686			457,934				457,934
Dividends on Preferred Stock	(7,519)				(7,519)			(5,559)				(5,559)
Dividends on Common Stock	(767,500)				(767,500)			(69,500)				(69,500)
Capital Contributions from Eversource Parent								275,000			275,000
Other Comprehensive Income/(Loss), Net of Tax	(11,352)						(11,352)	(14)						(14)
Ending balance (in shares) at Dec. 31, 2020			342,954,023							6,035,205
Ending balance at Dec. 31, 2020	14,063,566		$ 1,789,092	8,015,663	4,613,201		(76,411)	5,044,786		$ 60,352	2,810,765	2,173,367		302
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,228,046				1,228,046			401,725				401,725
Dividends on Preferred Stock	(7,519)				(7,519)			(5,559)				(5,559)
Dividends on Common Stock	(828,337)				(828,337)			(341,400)				(341,400)
Capital Contributions from Eversource Parent	160,000							200,000			200,000
Other Comprehensive Income/(Loss), Net of Tax	$ 34,136						34,136	(51)						(51)
Ending balance (in shares) at Dec. 31, 2021	344,403,196		344,403,196							6,035,205
Ending balance at Dec. 31, 2021	$ 14,599,844		$ 1,789,092	8,098,514	5,005,391		(42,275)	5,299,501		$ 60,352	3,010,765	2,228,133		251
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,412,394				1,412,394			532,920				532,920
Dividends on Preferred Stock	(7,519)				(7,519)			(5,559)				(5,559)
Dividends on Common Stock	(883,113)				(883,113)			(292,400)				(292,400)
Capital Contributions from Eversource Parent								250,000			250,000
Other Comprehensive Income/(Loss), Net of Tax	$ 2,854						2,854	(82)						(82)
Ending balance (in shares) at Dec. 31, 2022	348,443,855		348,443,855							6,035,205
Ending balance 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

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THE CONNECTICUT LIGHT AND POWER COMPANY STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities:
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	1,194,246	1,103,008	981,380
Deferred Income Taxes	346,779	347,056	257,154
Uncollectible Expense	61,876	60,886	53,461
Pension, SERP and PBOP (Income)/Expense, Net	(160,857)	(14,693)	12,888
Pension Contributions	(83,148)	(182,344)	(111,524)
Regulatory Under Recoveries, Net	(205,294)	(314,211)	(516,411)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	(72,041)	81,274	0
Cost of Removal Expenditures	(303,755)	(242,130)	(148,332)
Other	(39,192)	(64,640)	(25,957)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(470,593)	(135,505)	(351,843)
Taxes Receivable/Accrued, Net	18,358	(110,621)	43,819
Accounts Payable	377,657	(29,201)	122,567
Other Current Assets and Liabilities, Net	(45,583)	3,710	(24,995)
Net Cash Flows Provided by Operating Activities	2,401,293	1,962,600	1,682,572
Investing Activities:
Investments in Property, Plant and Equipment	(3,441,852)	(3,175,080)	(2,942,996)
Other Investing Activities	20,420	22,178	23,809
Net Cash Flows Used in Investing Activities	(4,130,490)	(3,447,374)	(4,129,275)
Financing Activities:
Cash Dividends on Common Shares	(860,033)	(805,439)	(744,665)
Cash Dividends on Preferred Stock	(7,519)	(7,519)	(7,519)
Proceeds from (Repayments of) Short-Term Debt	(78,170)	256,125	13,955
Issuance of Long-Term Debt	4,045,000	3,230,000	2,760,000
Retirement of Long-Term Debt	(1,175,000)	(1,142,500)	(327,236)
Other Financing Activities	(48,185)	(46,625)	14,273
Net Cash Flows Provided by Financing Activities	2,029,941	1,440,832	2,594,590
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	300,744	(43,942)	147,887
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	221,008	264,950	117,063
Cash, Cash Equivalents and Restricted Cash - End of Year	521,752	221,008	264,950
The Connecticut Light and Power Company
Operating Activities:
Net Income	532,920	401,725	457,934
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	355,511	338,915	320,709
Deferred Income Taxes	45,381	123,889	144,527
Uncollectible Expense	15,578	13,495	12,882
Pension, SERP and PBOP (Income)/Expense, Net	(28,971)	5,295	11,372
Pension Contributions	0	(98,913)	(23,200)
Regulatory Under Recoveries, Net	(144,793)	(152,775)	(279,941)
(Customer Credits)/Reserve at CL&P related to PURA Settlement Agreement and Storm Performance Penalty	(72,041)	81,274	0
Amortization of Regulatory Assets, Net	335,636	99,009	58,412
Cost of Removal Expenditures	(71,596)	(95,792)	(57,343)
Other	(25,927)	(10,194)	(57,870)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(256,338)	(75,881)	(126,638)
Taxes Receivable/Accrued, Net	897	(25,162)	(12,014)
Accounts Payable	207,698	24,895	(17,028)
Other Current Assets and Liabilities, Net	(24,308)	(16,925)	(34,729)
Net Cash Flows Provided by Operating Activities	869,647	612,855	397,073
Investing Activities:
Investments in Property, Plant and Equipment	(876,740)	(790,083)	(833,973)
Other Investing Activities	591	329	573
Net Cash Flows Used in Investing Activities	(876,149)	(789,754)	(833,400)
Financing Activities:
Cash Dividends on Common Shares	(292,400)	(341,400)	(69,500)
Cash Dividends on Preferred Stock	(5,559)	(5,559)	(5,559)
Proceeds from (Repayments of) Short-Term Debt	0	0	(63,800)
Issuance of Long-Term Debt	0	425,000	400,000
Retirement of Long-Term Debt	0	(120,500)	0
Capital Contributions from Eversource Parent	250,000	200,000	275,000
Other Financing Activities	0	(5,663)	(4,976)
Net Cash Flows Provided by Financing Activities	(47,959)	151,878	531,165
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	(54,461)	(25,021)	94,838
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	74,788	99,809	4,971
Cash, Cash Equivalents and Restricted Cash - End of Year	$ 20,327	$ 74,788	$ 99,809

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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 47,597	$ 66,773
Cash Equivalents	327,006	0
Receivables, Net (net of allowance for uncollectible accounts)	1,517,138	1,226,069
Unbilled Revenues	238,968	210,879
Materials, Supplies, Natural Gas and REC Inventory	374,395	267,547
Regulatory Assets	1,335,491	1,129,093
Prepayments and Other Current Assets	382,603	369,759
Total Current Assets	4,223,198	3,270,120
Property, Plant and Equipment, Net	36,112,820	33,377,650
Deferred Debits and Other Assets:
Regulatory Assets	4,242,794	4,586,709
Prepaid Pension and PBOP	1,045,524	271,987
Other Long-Term Assets	541,344	611,769
Total Deferred Debits and Other Assets	12,894,882	11,844,374
Total Assets	53,230,900	48,492,144
Current Liabilities:
Notes Payable	1,442,200	1,505,450
Long-Term Debt – Current Portion	1,320,129	1,193,097
Accounts Payable	2,113,905	1,672,230
Regulatory Liabilities	890,786	602,432
Other Current Liabilities	989,053	830,620
Total Current Liabilities	6,799,283	5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,067,902	4,597,120
Regulatory Liabilities	3,930,305	3,866,251
Accrued Pension, SERP and PBOP	135,473	242,463
Other Long-Term Liabilities	888,081	971,080
Total Deferred Credits and Other Liabilities	10,668,403	10,412,412
Capitalization:
Long-Term Debt	19,723,994	17,023,577
Preferred Stock Not Subject to Mandatory Redemption	155,570	155,570
Common Shareholders' Equity:
Capital Surplus, Paid In	8,401,731	8,098,514
Retained Earnings	5,527,153	5,005,391
Accumulated Other Comprehensive Income/(Loss)	(39,421)	(42,275)
Common Shareholders' Equity	15,473,158	14,599,844
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	53,230,900	48,492,144
NSTAR Electric Company
Current Assets:
Cash	738	745
Cash Equivalents	327,006	0
Receivables, Net (net of allowance for uncollectible accounts)	453,371	405,674
Accounts Receivable from Affiliated Companies	35,196	67,420
Unbilled Revenues	39,680	37,497
Materials, Supplies, Natural Gas and REC Inventory	138,352	116,712
Taxes Receivable	45,474	80,617
Regulatory Assets	492,759	443,956
Prepayments and Other Current Assets	25,802	22,397
Total Current Assets	1,558,378	1,175,018
Property, Plant and Equipment, Net	11,626,968	10,876,614
Deferred Debits and Other Assets:
Regulatory Assets	1,221,619	1,135,231
Prepaid Pension and PBOP	576,809	441,426
Other Long-Term Assets	111,846	171,657
Total Deferred Debits and Other Assets	1,910,274	1,748,314
Total Assets	15,095,620	13,799,946
Current Liabilities:
Notes Payable	0	162,500
Long-Term Debt – Current Portion	80,000	400,000
Accounts Payable	559,676	490,915
Accounts Payable to Affiliated Companies	108,907	129,575
Obligations to Third Party Suppliers	142,628	116,273
Renewable Portfolio Standards Compliance Obligations	120,239	100,200
Regulatory Liabilities	373,221	228,248
Other Current Liabilities	83,925	84,303
Total Current Liabilities	1,468,596	1,712,014
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	1,700,875	1,579,508
Regulatory Liabilities	1,548,081	1,559,072
Accrued Pension, SERP and PBOP	1,619	2,046
Other Long-Term Liabilities	287,694	345,888
Total Deferred Credits and Other Liabilities	3,538,269	3,486,514
Capitalization:
Long-Term Debt	4,345,085	3,585,399
Preferred Stock Not Subject to Mandatory Redemption	43,000	43,000
Common Shareholders' Equity:
Common Shares	0	0
Capital Surplus, Paid In	2,778,942	2,253,942
Retained Earnings	2,921,444	2,718,576
Accumulated Other Comprehensive Income/(Loss)	284	501
Common Shareholders' Equity	5,700,670	4,973,019
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$ 15,095,620	$ 13,799,946

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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for uncollectible accounts	$ 486,297	$ 417,406	$ 358,900	$ 224,800
NSTAR Electric
Allowance for uncollectible accounts	$ 94,958	$ 97,005	$ 91,600	$ 75,400

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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues	$ 12,289,336	$ 9,863,085	$ 8,904,430
Operating Expenses:
Purchased Power and Transmission	5,014,074	3,372,344	2,987,840
Operations and Maintenance	1,865,328	1,739,685	1,480,252
Depreciation	1,194,246	1,103,008	981,380
Energy Efficiency Programs	658,051	592,775	535,760
Taxes Other Than Income Taxes	910,591	829,987	752,785
Total Operating Expenses	10,091,182	7,869,764	6,915,696
Operating Income	2,198,154	1,993,321	1,988,734
Interest Expense	678,274	582,334	538,452
Other Income, Net	346,088	161,282	108,590
Income Before Income Tax Expense	1,865,968	1,572,269	1,558,872
Income Tax Expense	453,574	344,223	346,186
Net Income	1,412,394	1,228,046	1,212,686
NSTAR Electric Company
Operating Revenues	3,583,070	3,056,350	2,941,148
Operating Expenses:
Purchased Power and Transmission	1,264,824	932,530	879,244
Operations and Maintenance	640,834	563,172	534,118
Depreciation	361,969	337,451	319,468
Amortization of Regulatory Assets, Net	83,855	55,774	83,248
Energy Efficiency Programs	332,247	288,612	263,986
Taxes Other Than Income Taxes	246,705	216,703	206,764
Total Operating Expenses	2,930,434	2,394,242	2,286,828
Operating Income	652,636	662,108	654,320
Interest Expense	162,892	146,048	130,508
Other Income, Net	142,661	74,844	52,017
Income Before Income Tax Expense	632,405	590,904	575,829
Income Tax Expense	139,977	114,335	130,828
Net Income	$ 492,428	$ 476,569	$ 445,001

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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Other Comprehensive Income/(Loss), Net of Tax:
Changes in Funded Status of SERP Benefit Plan	4,470	33,835	(13,290)
Qualified Cash Flow Hedging Instruments	20	972	1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)	(671)	342
Other Comprehensive Income/(Loss), Net of Tax	2,854	34,136	(11,352)
Comprehensive Income Attributable to Common Shareholders	1,407,729	1,254,663	1,193,815
NSTAR Electric Company
Net Income	492,428	476,569	445,001
Other Comprehensive Income/(Loss), Net of Tax:
Changes in Funded Status of SERP Benefit Plan	(221)	(100)	(286)
Qualified Cash Flow Hedging Instruments	20	298	437
Changes in Unrealized (Losses)/Gains on Marketable Securities	(16)	(6)	3
Other Comprehensive Income/(Loss), Net of Tax	(217)	192	154
Comprehensive Income Attributable to Common Shareholders	$ 492,211	$ 476,761	$ 445,155

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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Adoption of New Accounting Standard	Common Stock	Capital Surplus, Paid In	Retained Earnings	Retained Earnings Adoption of New Accounting Standard	Accumulated Other Comprehensive Income (Loss)	NSTAR Electric	NSTAR Electric Adoption of New Accounting Standard	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, 2019			329,880,645							200
Beginning balance at Dec. 31, 2019	$ 12,629,994	$ (1,514)	$ 1,729,292	$ 7,087,768	$ 4,177,048	$ (1,514)	$ (65,059)	$ 4,159,884	$ (161)	$ 0	$ 1,813,442	$ 2,346,287	$ 155
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,212,686				1,212,686			445,001				445,001
Dividends on Preferred Stock	(7,519)				(7,519)			(1,960)				(1,960)
Dividends on Common Stock	(767,500)				(767,500)			(262,000)				(262,000)
Capital Contributions from Eversource Parent								180,500			180,500
Other Comprehensive Income/(Loss), Net of Tax	(11,352)						(11,352)	154					154
Ending balance (in shares) at Dec. 31, 2020			342,954,023							200
Ending balance at Dec. 31, 2020	14,063,566		$ 1,789,092	8,015,663	4,613,201		(76,411)	4,521,418		$ 0	1,993,942	2,527,167	309
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,228,046				1,228,046			476,569				476,569
Dividends on Preferred Stock	(7,519)				(7,519)			(1,960)				(1,960)
Dividends on Common Stock	(828,337)				(828,337)			(283,200)				(283,200)
Capital Contributions from Eversource Parent	160,000							260,000			260,000
Other Comprehensive Income/(Loss), Net of Tax	$ 34,136						34,136	192					192
Ending balance (in shares) at Dec. 31, 2021	344,403,196		344,403,196							200
Ending balance at Dec. 31, 2021	$ 14,599,844		$ 1,789,092	8,098,514	5,005,391		(42,275)	4,973,019		$ 0	2,253,942	2,718,576	501
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,412,394				1,412,394			492,428				492,428
Dividends on Preferred Stock	(7,519)				(7,519)			(1,960)				(1,960)
Dividends on Common Stock	(883,113)				(883,113)			(287,600)				(287,600)
Capital Contributions from Eversource Parent								525,000			525,000
Other Comprehensive Income/(Loss), Net of Tax	$ 2,854						2,854	(217)					(217)
Ending balance (in shares) at Dec. 31, 2022	348,443,855		348,443,855							200
Ending balance 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

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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities:
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	1,194,246	1,103,008	981,380
Deferred Income Taxes	346,779	347,056	257,154
Pension, SERP and PBOP (Income)/Expense, Net	(160,857)	(14,693)	12,888
Pension Contributions	(83,148)	(182,344)	(111,524)
Regulatory Under Recoveries, Net	(205,294)	(314,211)	(516,411)
Uncollectible Expense	61,876	60,886	53,461
Cost of Removal Expenditures	(303,755)	(242,130)	(148,332)
Payment of Withheld Property Taxes	(78,446)	0	0
Other	(39,192)	(64,640)	(25,957)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(470,593)	(135,505)	(351,843)
Taxes Receivable/Accrued, Net	18,358	(110,621)	43,819
Accounts Payable	377,657	(29,201)	122,567
Other Current Assets and Liabilities, Net	(45,583)	3,710	(24,995)
Net Cash Flows Provided by Operating Activities	2,401,293	1,962,600	1,682,572
Investing Activities:
Investments in Property, Plant and Equipment	(3,441,852)	(3,175,080)	(2,942,996)
Other Investing Activities	20,420	22,178	23,809
Net Cash Flows Used in Investing Activities	(4,130,490)	(3,447,374)	(4,129,275)
Financing Activities:
Cash Dividends on Common Shares	(860,033)	(805,439)	(744,665)
Cash Dividends on Preferred Stock	(7,519)	(7,519)	(7,519)
Proceeds from (Repayments of) Short-Term Debt	(78,170)	256,125	13,955
Issuance of Long-Term Debt	4,045,000	3,230,000	2,760,000
Retirement of Long-Term Debt	(1,175,000)	(1,142,500)	(327,236)
Other Financing Activities	(48,185)	(46,625)	14,273
Net Cash Flows Provided by Financing Activities	2,029,941	1,440,832	2,594,590
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	300,744	(43,942)	147,887
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	221,008	264,950	117,063
Cash, Cash Equivalents and Restricted Cash - End of Year	521,752	221,008	264,950
NSTAR Electric
Operating Activities:
Net Income	492,428	476,569	445,001
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	361,969	337,451	319,468
Deferred Income Taxes	78,039	57,507	72,595
Pension, SERP and PBOP (Income)/Expense, Net	(55,830)	(26,120)	(18,132)
Pension Contributions	(15,000)	(30,000)	(650)
Regulatory Under Recoveries, Net	(88,220)	(79,075)	(186,081)
Amortization of Regulatory Assets, Net	83,855	55,774	83,248
Uncollectible Expense	21,550	16,649	15,293
Cost of Removal Expenditures	(57,339)	(58,967)	(39,166)
Payment of Withheld Property Taxes	(76,311)	0	0
Other	(14,294)	(32,447)	(22,888)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(23,757)	(45,774)	(81,571)
Taxes Receivable/Accrued, Net	35,143	(16,219)	(44,045)
Accounts Payable	8,815	31,650	25,573
Other Current Assets and Liabilities, Net	20,430	13,944	(42,831)
Net Cash Flows Provided by Operating Activities	771,478	700,942	525,814
Investing Activities:
Investments in Property, Plant and Equipment	(954,281)	(960,949)	(907,000)
Other Investing Activities	165	91	159
Net Cash Flows Used in Investing Activities	(954,116)	(960,858)	(906,841)
Financing Activities:
Cash Dividends on Common Shares	(287,600)	(283,200)	(262,000)
Cash Dividends on Preferred Stock	(1,960)	(1,960)	(1,960)
(Decrease)/Increase in Notes Payable	(162,500)	(32,500)	184,500
Proceeds from (Repayments of) Short-Term Debt	0	(21,300)	(9,000)
Capital Contributions from Eversource Parent	525,000	260,000	180,500
Issuance of Long-Term Debt	850,000	600,000	400,000
Retirement of Long-Term Debt	(400,000)	(250,000)	(95,000)
Other Financing Activities	(13,188)	(10,355)	(4,915)
Net Cash Flows Provided by Financing Activities	509,752	260,685	392,125
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	327,114	769	11,098
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	18,179	17,410	6,312
Cash, Cash Equivalents and Restricted Cash - End of Year	$ 345,293	$ 18,179	$ 17,410

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash	$ 47,597	$ 66,773
Receivables, Net (net of allowance for uncollectible accounts)	1,517,138	1,226,069
Unbilled Revenues	238,968	210,879
Materials, Supplies and REC Inventory	374,395	267,547
Regulatory Assets	1,335,491	1,129,093
Prepayments and Other Current Assets	382,603	369,759
Total Current Assets	4,223,198	3,270,120
Property, Plant and Equipment, Net	36,112,820	33,377,650
Deferred Debits and Other Assets:
Regulatory Assets	4,242,794	4,586,709
Prepaid Pension	1,045,524	271,987
Other Long-Term Assets	541,344	611,769
Total Deferred Debits and Other Assets	12,894,882	11,844,374
Total Assets	53,230,900	48,492,144
Current Liabilities:
Long-Term Debt – Current Portion	1,320,129	1,193,097
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	2,113,905	1,672,230
Regulatory Liabilities	890,786	602,432
Other Current Liabilities	989,053	830,620
Total Current Liabilities	6,799,283	5,847,039
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	5,067,902	4,597,120
Regulatory Liabilities	3,930,305	3,866,251
Accrued Pension, SERP and PBOP	135,473	242,463
Other Long-Term Liabilities	888,081	971,080
Total Deferred Credits and Other Liabilities	10,668,403	10,412,412
Capitalization:
Long-Term Debt	19,723,994	17,023,577
Rate Reduction Bonds	410,492	453,702
Common Shareholders' Equity:
Capital Surplus, Paid In	8,401,731	8,098,514
Retained Earnings	5,527,153	5,005,391
Accumulated Other Comprehensive Income/(Loss)	(39,421)	(42,275)
Common Shareholders' Equity	15,473,158	14,599,844
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	53,230,900	48,492,144
PSNH
Current Assets:
Cash	136	15
Receivables, Net (net of allowance for uncollectible accounts)	173,337	124,232
Accounts Receivable from Affiliated Companies	8,193	17,156
Unbilled Revenues	72,713	53,937
Taxes Receivable	27,978	4,487
Materials, Supplies and REC Inventory	34,521	25,930
Regulatory Assets	102,240	107,169
Special Deposits	33,140	31,390
Prepayments and Other Current Assets	13,297	17,622
Total Current Assets	465,555	381,938
Property, Plant and Equipment, Net	4,060,224	3,656,462
Deferred Debits and Other Assets:
Regulatory Assets	593,974	679,182
Prepaid Pension	66,384	0
Other Long-Term Assets	16,517	23,202
Total Deferred Debits and Other Assets	676,875	702,384
Total Assets	5,202,654	4,740,784
Current Liabilities:
Notes Payable to Eversource Parent	173,300	110,600
Long-Term Debt – Current Portion	29,668	0
Rate Reduction Bonds – Current Portion	43,210	43,210
Accounts Payable	291,556	166,452
Accounts Payable to Affiliated Companies	36,231	43,485
Regulatory Liabilities	161,963	120,176
Other Current Liabilities	59,616	63,005
Total Current Liabilities	795,544	546,928
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	562,802	537,978
Regulatory Liabilities	391,628	381,366
Accrued Pension, SERP and PBOP	6,508	30,184
Other Long-Term Liabilities	30,579	34,080
Total Deferred Credits and Other Liabilities	991,517	983,608
Capitalization:
Long-Term Debt	1,134,914	1,163,833
Rate Reduction Bonds	410,492	453,702
Common Shareholders' Equity:
Common Shares	0	0
Capital Surplus, Paid In	1,298,134	1,088,134
Retained Earnings	572,126	504,556
Accumulated Other Comprehensive Income/(Loss)	(73)	23
Common Shareholders' Equity	1,870,187	1,592,713
Commitments and Contingencies (Note 13)
Total Liabilities and Capitalization	$ 5,202,654	$ 4,740,784

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for uncollectible accounts	$ 486,297	$ 417,406	$ 358,900	$ 224,800
PSNH
Allowance for uncollectible accounts	$ 29,236	$ 24,331	$ 17,200	$ 10,500

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Revenues	$ 12,289,336	$ 9,863,085	$ 8,904,430
Operating Expenses:
Purchased Power and Transmission	5,014,074	3,372,344	2,987,840
Operations and Maintenance	1,865,328	1,739,685	1,480,252
Depreciation	1,194,246	1,103,008	981,380
Energy Efficiency Programs	658,051	592,775	535,760
Taxes Other Than Income Taxes	910,591	829,987	752,785
Total Operating Expenses	10,091,182	7,869,764	6,915,696
Operating Income	2,198,154	1,993,321	1,988,734
Interest Expense	678,274	582,334	538,452
Other Income, Net	346,088	161,282	108,590
Income Before Income Tax Expense	1,865,968	1,572,269	1,558,872
Income Tax Expense	453,574	344,223	346,186
Net Income	1,412,394	1,228,046	1,212,686
PSNH
Operating Revenues	1,474,799	1,177,248	1,079,095
Operating Expenses:
Purchased Power and Transmission	665,478	370,271	364,067
Operations and Maintenance	255,991	237,659	219,325
Depreciation	127,962	120,065	100,372
Amortization of Regulatory Assets, Net	42,867	86,832	52,804
Energy Efficiency Programs	37,434	38,752	37,583
Taxes Other Than Income Taxes	95,301	91,465	81,611
Total Operating Expenses	1,225,033	945,044	855,762
Operating Income	249,766	232,204	223,333
Interest Expense	59,548	56,998	58,127
Other Income, Net	32,666	14,565	13,786
Income Before Income Tax Expense	222,884	189,771	178,992
Income Tax Expense	51,314	39,433	31,680
Net Income	$ 171,570	$ 150,338	$ 147,312

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	20	972	1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)	(671)	342
Other Comprehensive Income/(Loss), Net of Tax	2,854	34,136	(11,352)
Comprehensive Income Attributable to Common Shareholders	1,407,729	1,254,663	1,193,815
PSNH
Net Income	171,570	150,338	147,312
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	0	673	1,075
Changes in Unrealized (Losses)/Gains on Marketable Securities	(96)	(37)	19
Other Comprehensive Income/(Loss), Net of Tax	(96)	636	1,094
Comprehensive Income Attributable to Common Shareholders	$ 171,474	$ 150,974	$ 148,406

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Thousands	Total	Adoption of New Accounting Standard	Common Stock	Capital Surplus, Paid In	Retained Earnings	Retained Earnings Adoption of New Accounting Standard	Accumulated Other Comprehensive Income (Loss)	PSNH	PSNH Adoption of New Accounting Standard	PSNH Common Stock	PSNH Capital Surplus, Paid In	PSNH Retained Earnings	PSNH Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2019			329,880,645							301
Beginning balance at Dec. 31, 2019	$ 12,629,994	$ (1,514)	$ 1,729,292	$ 7,087,768	$ 4,177,048	$ (1,514)	$ (65,059)	$ 1,391,733	$ (300)	$ 0	$ 903,134	$ 490,306	$ (1,707)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,212,686				1,212,686			147,312				147,312
Dividends on Common Stock	(767,500)				(767,500)			(22,300)				(22,300)
Capital Contributions from Eversource Parent								25,000			25,000
Other Comprehensive Income/(Loss), Net of Tax	(11,352)						(11,352)	1,094					1,094
Ending balance (in shares) at Dec. 31, 2020			342,954,023							301
Ending balance at Dec. 31, 2020	14,063,566		$ 1,789,092	8,015,663	4,613,201		(76,411)	1,542,539		$ 0	928,134	615,018	(613)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,228,046				1,228,046			150,338				150,338
Dividends on Common Stock	(828,337)				(828,337)			(260,800)				(260,800)
Capital Contributions from Eversource Parent	160,000										160,000
Other Comprehensive Income/(Loss), Net of Tax	$ 34,136						34,136	636					636
Ending balance (in shares) at Dec. 31, 2021	344,403,196		344,403,196							301
Ending balance at Dec. 31, 2021	$ 14,599,844		$ 1,789,092	8,098,514	5,005,391		(42,275)	1,592,713		$ 0	1,088,134	504,556	23
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	1,412,394				1,412,394			171,570				171,570
Dividends on Common Stock	(883,113)				(883,113)			(104,000)				(104,000)
Capital Contributions from Eversource Parent								210,000			210,000
Other Comprehensive Income/(Loss), Net of Tax	$ 2,854						2,854	(96)					(96)
Ending balance (in shares) at Dec. 31, 2022	348,443,855		348,443,855							301
Ending balance 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)

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PUBLIC SERVICE COMPANY OF NEW HAMPSHIRE AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities:
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	1,194,246	1,103,008	981,380
Deferred Income Taxes	346,779	347,056	257,154
Uncollectible Expense	61,876	60,886	53,461
Pension, SERP and PBOP Income, Net	(160,857)	(14,693)	12,888
Pension Contributions	(83,148)	(182,344)	(111,524)
Regulatory Over/(Under) Recoveries, Net	(205,294)	(314,211)	(516,411)
Cost of Removal Expenditures	(303,755)	(242,130)	(148,332)
Other	(39,192)	(64,640)	(25,957)
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(470,593)	(135,505)	(351,843)
Taxes Receivable/Accrued, Net	18,358	(110,621)	43,819
Accounts Payable	377,657	(29,201)	122,567
Other Current Assets and Liabilities, Net	(45,583)	3,710	(24,995)
Net Cash Flows Provided by Operating Activities	2,401,293	1,962,600	1,682,572
Investing Activities:
Investments in Property, Plant and Equipment	(3,441,852)	(3,175,080)	(2,942,996)
Other Investing Activities	20,420	22,178	23,809
Net Cash Flows Used in Investing Activities	(4,130,490)	(3,447,374)	(4,129,275)
Financing Activities:
Cash Dividends on Common Shares	(860,033)	(805,439)	(744,665)
Increase (Decrease) in Notes Payable to Eversource Parent	78,170	(256,125)	(13,955)
Issuance of Long-Term Debt	4,045,000	3,230,000	2,760,000
Retirement of Long-Term Debt	(1,175,000)	(1,142,500)	(327,236)
Repayment of Rate Reduction Bonds	(43,210)	(43,210)	(43,210)
Other Financing Activities	(48,185)	(46,625)	14,273
Net Cash Flows Provided by Financing Activities	2,029,941	1,440,832	2,594,590
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	300,744	(43,942)	147,887
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	221,008	264,950	117,063
Cash, Cash Equivalents and Restricted Cash - End of Year	521,752	221,008	264,950
PSNH
Operating Activities:
Net Income	171,570	150,338	147,312
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Depreciation	127,962	120,065	100,372
Deferred Income Taxes	15,765	(14,530)	7,337
Uncollectible Expense	9,211	13,113	5,164
Pension, SERP and PBOP Income, Net	(16,421)	(3,296)	(1,255)
Pension Contributions	0	0	(19,500)
Regulatory Over/(Under) Recoveries, Net	53,181	32,587	(45,830)
Amortization of Regulatory Assets, Net	42,867	86,832	52,804
Cost of Removal Expenditures	(39,895)	(30,804)	(22,063)
Other	8,691	(1,370)	17,221
Changes in Current Assets and Liabilities:
Receivables and Unbilled Revenues, Net	(62,078)	(32,003)	(33,612)
Taxes Receivable/Accrued, Net	(23,492)	3,952	(6,942)
Accounts Payable	81,046	(3,256)	27,270
Other Current Assets and Liabilities, Net	(6,908)	14,454	(9,610)
Net Cash Flows Provided by Operating Activities	361,499	336,082	218,668
Investing Activities:
Investments in Property, Plant and Equipment	(485,611)	(326,379)	(342,586)
Other Investing Activities	1,013	562	982
Net Cash Flows Used in Investing Activities	(484,598)	(325,817)	(341,604)
Financing Activities:
Cash Dividends on Common Shares	(104,000)	(260,800)	(22,300)
Increase (Decrease) in Notes Payable to Eversource Parent	62,700	64,300	19,300
Issuance of Long-Term Debt	0	350,000	150,000
Retirement of Long-Term Debt	0	(282,000)	0
Repayment of Rate Reduction Bonds	(43,210)	(43,210)	(43,210)
Capital Contributions from Eversource Parent	210,000	160,000	25,000
Other Financing Activities	(705)	(2,984)	(2,987)
Net Cash Flows Provided by Financing Activities	124,785	(14,694)	125,803
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	1,686	(4,429)	2,867
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	35,126	39,555	36,688
Cash, Cash Equivalents and Restricted Cash - End of Year	$ 36,812	$ 35,126	$ 39,555

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

A.     About Eversource, CL&P, NSTAR Electric and PSNH

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.  

Eversource, CL&P, NSTAR Electric and PSNH are reporting companies under the Securities Exchange Act of 1934.  Eversource Energy is a public utility holding company under the Public Utility Holding Company Act of 2005.  Arrangements among the regulated electric companies and other Eversource companies, outside agencies and other utilities covering interconnections, interchange of electric power and sales of utility property are subject to regulation by the FERC. Eversource's regulated companies are subject to regulation of rates, accounting and other matters by the FERC and/or applicable state regulatory commissions (the PURA for CL&P, Yankee Gas and Aquarion, the DPU for NSTAR Electric, NSTAR Gas, EGMA and Aquarion, and the NHPUC for PSNH and Aquarion).

CL&P, NSTAR Electric and PSNH furnish franchised retail electric service in Connecticut, Massachusetts and New Hampshire, respectively. NSTAR Gas and EGMA are engaged in the distribution and sale of natural gas to customers within Massachusetts and Yankee Gas is engaged in the distribution and sale of natural gas to customers within Connecticut. Aquarion is engaged in the collection, treatment and distribution of water in Connecticut, Massachusetts and New Hampshire. CL&P, NSTAR Electric and PSNH's results include the operations of their respective distribution and transmission businesses. The distribution business also includes the results of NSTAR Electric's solar power facilities.

Eversource Service, Eversource's service company, and several wholly-owned real estate subsidiaries of Eversource, provide support services to Eversource, including its regulated companies.

B.     Basis of Presentation

The 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 consolidated financial statements of Eversource, NSTAR Electric and PSNH and the financial statements of CL&P are herein collectively referred to as the "financial statements."  

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.

CYAPC and YAEC are inactive regional nuclear power companies engaged in the long-term storage of their spent nuclear fuel. Eversource consolidates the operations of CYAPC and YAEC because CL&P's, NSTAR Electric's and PSNH's combined ownership and voting interests in each of these entities is greater than 50 percent.  Intercompany transactions between CL&P, NSTAR Electric, PSNH and the CYAPC and YAEC companies have been eliminated in consolidation of the Eversource financial statements.  

Eversource holds several equity ownership interests that are not consolidated and are accounted for under the equity method.

In accordance with accounting guidance on noncontrolling interests in consolidated financial statements, the Preferred Stock of CL&P and the Preferred Stock of NSTAR Electric, which are not owned by Eversource or its consolidated subsidiaries and are not subject to mandatory redemption, have been presented as noncontrolling interests in the financial statements of Eversource.  The Preferred Stock of CL&P and the Preferred Stock of NSTAR Electric are considered to be temporary equity and have been classified between liabilities and permanent shareholders' equity on the balance sheets of Eversource, CL&P and NSTAR Electric due to a provision in the preferred stock agreements of both CL&P and NSTAR Electric that grant preferred stockholders the right to elect a majority of the CL&P and NSTAR Electric Boards of Directors, respectively, should certain conditions exist, such as if preferred dividends are in arrears for a specified amount of time.  The Net Income reported in the statements of income and cash flows represents net income prior to apportionment to noncontrolling interests, which is represented by dividends on preferred stock of CL&P and NSTAR Electric.

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.

As of December 31, 2022 and 2021, Eversource's carrying amount of goodwill was $4.52 billion and $4.48 billion, respectively. Eversource performs an assessment for possible impairment of its goodwill at least annually.  Eversource completed its annual goodwill impairment assessment for each of its reporting units as of October 1, 2022 and determined that no impairment exists.  See Note 25, "Goodwill," for further information.

For the year ended December 31, 2022, no impairments to goodwill, long-lived assets, available-for-sale debt securities, or equity method investment carrying values were identified.

Certain reclassifications of prior year data were made in the accompanying financial statements to conform to the current year presentation.

C.     Cash and Cash Equivalents

Cash includes cash on hand. At the end of each reporting period, any overdraft amounts are reclassified from Cash to Accounts Payable on the balance sheets. Cash Equivalents include short-term cash investments that are highly liquid in nature and have original maturities of three months or less.  

D.     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, which was implemented on January 1, 2020 (ASU 2016-13), 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 being offered to customers, reasonable forecasts, and expectations of future collectability and collection efforts. Management continuously assesses the collectability of receivables and adjusts estimates based on actual experience and future expectations based on economic conditions, collection efforts and other factors. Management also monitors the aging analysis of receivables to determine if there are changes in the collections of accounts receivable. Receivable balances are written off against the allowance for uncollectible accounts when the customer accounts are no longer in service and these balances are deemed to be uncollectible. Management concluded that the reserve balance as of December 31, 2022 adequately reflected the collection risk and net realizable value for its receivables.

As of December 31, 2022 and 2021, the total amount incurred as a result of COVID-19 included in the allowance for uncollectible accounts was $50.9 million and $55.3 million at Eversource, $16.0 million and $23.9 million at CL&P, and $4.1 million and $9.0 million at NSTAR Electric, respectively. At our Connecticut and Massachusetts utilities, the COVID-19 related uncollectible amounts were deferred either as incremental regulatory costs or deferred through existing regulatory tracking mechanisms that recover uncollectible energy supply costs, as management believes it is probable that these costs will ultimately be recovered from customers in future rates. No COVID-19 related uncollectible amounts were deferred at PSNH as a result of a July 2021 NHPUC order. Based on the status of our COVID-19 regulatory dockets, policies and practices in the jurisdictions in which we operate, we believe the state regulatory commissions in Connecticut and Massachusetts will allow us to recover our incremental uncollectible customer receivable costs associated with COVID-19.

The PURA allows CL&P and Yankee Gas to accelerate the recovery of accounts receivable balances attributable to qualified customers under financial or medical duress (uncollectible hardship accounts receivable) outstanding for greater than 180 days and 90 days, respectively.  The DPU allows NSTAR Electric, NSTAR Gas and EGMA to recover in rates amounts associated with certain uncollectible hardship accounts receivable. These uncollectible hardship customer account balances are included in Regulatory Assets or Other Long-Term Assets on the balance sheets. Hardship customers are protected from shut-off in certain circumstances, and historical collection experience has reflected a higher default risk as compared to the rest of the receivable population. Management uses a higher credit risk profile for this pool of trade receivables as compared to non-hardship receivables. The allowance for uncollectible hardship accounts is included in the total uncollectible allowance balance.  

The total allowance for uncollectible accounts is included in Receivables, Net on the balance sheets. The activity in the allowance for uncollectible accounts by portfolio segment is as follows:

	Eversource						CL&P						NSTAR Electric						PSNH
(Millions of Dollars)	Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Total Allowance
Balance as of January 1, 2020	$	143.3	$	81.5	$	224.8	$	80.1	$	17.2	$	97.3	$	43.9	$	31.5	$	75.4	$	10.5
ASU 2016-13 Implementation    Impact on January 1, 2020	21.6		2.2		23.8		21.3		0.9		22.2		(1.6)		0.3		(1.3)		0.3
Increase due to CMA acquisition	—		24.2		24.2		—		—		—		—		—		—		—
Uncollectible Expense	—		53.5		53.5		—		12.9		12.9		—		15.3		15.3		5.2
Uncollectible Costs Deferred (1)	43.1		53.9		97.0		38.2		10.8		49.0		(1.7)		26.4		24.7		7.4
Write-Offs	(14.7)		(63.3)		(78.0)		(11.9)		(17.8)		(29.7)		(0.9)		(26.3)		(27.2)		(6.9)
Recoveries Collected	1.5		12.1		13.6		1.4		4.3		5.7		—		4.7		4.7		0.7
Balance as of December 31, 2020	$	194.8	$	164.1	$	358.9	$	129.1	$	28.3	$	157.4	$	39.7	$	51.9	$	91.6	$	17.2
Uncollectible Expense	—		60.9		60.9		—		13.5		13.5		—		16.6		16.6		13.1
Uncollectible Costs Deferred (1)	51.9		58.7		110.6		32.3		25.5		57.8		4.3		15.8		20.1		3.1
Write-Offs	(22.0)		(107.7)		(129.7)		(18.0)		(36.2)		(54.2)		(0.7)		(36.3)		(37.0)		(10.0)
Recoveries Collected	1.4		15.3		16.7		1.2		5.6		6.8		—		5.7		5.7		0.9
Balance as of December 31, 2021	$	226.1	$	191.3	$	417.4	$	144.6	$	36.7	$	181.3	$	43.3	$	53.7	$	97.0	$	24.3
Uncollectible Expense	—		61.9		61.9		—		15.6		15.6		—		21.6		21.6		9.2
Uncollectible Costs Deferred (1)	77.8		34.7		112.5		58.3		1.2		59.5		1.5		10.9		12.4		2.5
Write-Offs	(21.3)		(102.7)		(124.0)		(15.3)		(23.0)		(38.3)		(1.1)		(41.2)		(42.3)		(7.7)
Recoveries Collected	1.8		16.7		18.5		1.3		5.9		7.2		—		6.3		6.3		0.9
Balance as of December 31, 2022	$	284.4	$	201.9	$	486.3	$	188.9	$	36.4	$	225.3	$	43.7	$	51.3	$	95.0	$	29.2

(1)    These expected credit losses are deferred as regulatory costs on the balance sheets, as these amounts are ultimately recovered in rates. Amounts include uncollectible costs for hardship accounts and other customer receivables, including uncollectible amounts related to uncollectible energy supply costs and COVID-19. The increase in the allowance for uncollectible hardship accounts in 2022 at Eversource and CL&P primarily relates to increased customer enrollment in disconnection prevention programs in Connecticut.

E.    Transfer of Energy Efficiency Loans

CL&P transferred a portion of its energy efficiency customer loan portfolio to outside lenders in order to make additional loans to customers.  CL&P remains the servicer of the loans and will transmit customer payments to the lenders, with a maximum amount outstanding under this program of $55 million.  The amounts of the loans are included in Accounts Receivable, Net and Other Long-Term Assets, and are offset by Other Current Liabilities and Other Long-Term Liabilities on CL&P’s balance sheet. The current and long-term portions totaled $9.1 million and $13.0 million, respectively, as of December 31, 2022, and $10.5 million and $8.3 million, respectively, as of December 31, 2021.

F.     Materials, Supplies, Natural Gas and REC Inventory

Materials, Supplies, Natural Gas and REC Inventory include materials and supplies purchased primarily for construction or operation and maintenance purposes, natural gas purchased for delivery to customers, and RECs.  Inventory is valued at the lower of cost or net realizable value. RECs are purchased from suppliers of renewable sources of generation and are used to meet state mandated Renewable Portfolio Standards requirements.  The carrying amounts of materials and supplies, natural gas inventory, and RECs, which are included in Current Assets on the balance sheets, were as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Materials and Supplies	$	221.0	$	88.2	$	81.0	$	34.4	$	148.9	$	60.3	$	55.0	$	25.2
Natural Gas	95.9		—		—		—		56.2		—		—		—
RECs	57.5		—		57.4		0.1		62.4		—		61.7		0.7
Total	$	374.4	$	88.2	$	138.4	$	34.5	$	267.5	$	60.3	$	116.7	$	25.9

    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," Note 6, "Investments in Unconsolidated Affiliates," Note 7, "Asset Retirement Obligations," Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," Note 15, "Fair Value of Financial Instruments," and Note 25, “Goodwill,” to the financial statements.

H.     Derivative Accounting

Many of the electric and natural gas companies' contracts for the purchase and sale of energy or energy-related products are derivatives.  The accounting treatment for energy contracts entered into varies and depends on the intended use of the particular contract and on whether or not the contract is a derivative.  

The application of derivative accounting is complex and requires management judgment in the following respects: identification of derivatives and embedded derivatives, election and designation of a contract as normal, and determination of the fair value of derivative contracts.  All of these judgments can have a significant impact on the financial statements.  The judgment applied in the election of a contract as normal (and resulting accrual accounting) includes the conclusion that it is probable at the inception of the contract and throughout its term that it will result in physical delivery of the underlying product and that the quantities will be used or sold by the business in the normal course of business.  If facts and circumstances change and management can no longer support this conclusion, then a contract cannot be considered normal, accrual accounting is terminated, and fair value accounting is applied prospectively.  

The fair value of derivative contracts is based upon the contract terms and conditions and the underlying market price or fair value per unit.  When quantities are not specified in the contract, the Company determines whether the contract has a determinable quantity by using amounts referenced in default provisions and other relevant sections of the contract.  The fair value of derivative assets and liabilities with the same counterparty are offset and recorded as a net derivative asset or liability on the balance sheets.  

Regulatory assets or regulatory liabilities are recorded to offset the fair values of these derivative contracts related to energy and energy-related products, as contract settlements are recovered from, or refunded to, customers in future rates. All changes in the fair value of these derivative contracts are recorded as regulatory assets or liabilities and do not impact net income.

For further information regarding derivative contracts, see Note 4, "Derivative Instruments," to the financial statements.

I.     Operating Expenses

The cost of natural gas included in Purchased Power, Purchased Natural Gas and Transmission on the statements of income were as follows:

	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Eversource - Cost of Natural Gas	$	1,010.2	$	718.6	$	464.2

    Allowance for Funds Used During Construction

AFUDC represents the cost of borrowed and equity funds used to finance construction and is included in the cost of the electric, natural gas and water companies' utility plant on the balance sheet.  The portion of AFUDC attributable to borrowed funds is recorded as a reduction of Interest Expense, and the AFUDC related to equity funds is recorded as Other Income, Net on the statements of income.  AFUDC costs are recovered from customers over the service life of the related plant in the form of increased revenue collected as a result of higher depreciation expense.

The average AFUDC rate is based on a FERC-prescribed formula using the cost of a company's short-term financings and capitalization (preferred stock, long-term debt and common equity), as appropriate.  The average rate is applied to average eligible CWIP amounts to calculate AFUDC.

AFUDC costs and the weighted-average AFUDC rates were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars, except percentages)	2022			2021			2020
Borrowed Funds	$	21.8		$	18.4		$	23.7
Equity Funds	47.3			37.3			42.0
Total AFUDC	$	69.1		$	55.7		$	65.7
Average AFUDC Rate	4.7		%	4.2		%	5.0		%

	For the Years Ended December 31,
	2022									2021									2020
(Millions of Dollars, except percentages)	CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH
Borrowed Funds	$	4.8		$	10.7		$	1.4		$	2.9		$	9.0		$	0.8		$	6.6		$	9.1		$	2.1
Equity Funds	13.6			24.6			2.5			7.7			20.4			1.6			13.8			21.5			4.2
Total AFUDC	$	18.4		$	35.3		$	3.9		$	10.6		$	29.4		$	2.4		$	20.4		$	30.6		$	6.3
Average AFUDC Rate	6.6		%	5.4		%	2.6		%	5.0		%	4.9		%	2.5		%	5.9		%	5.7		%	4.7		%

K.     Other Income, Net

The components of Other Income, Net on the statements of income were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Pension, SERP and PBOP Non-Service Income Components,   Net of Deferred Portion (1)	$	219.8	$	84.4	$	44.4
AFUDC Equity	47.3		37.3		42.0
Equity in Earnings of Unconsolidated Affiliates (2)	22.9		14.2		14.2
Investment Income/(Loss)	1.9		(0.2)		1.1
Interest Income	50.5		25.6		4.8
Gain on Sale of Property	2.6		0.1		1.8
Other	1.1		(0.1)		0.3
Total Other Income, Net	$	346.1	$	161.3	$	108.6

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion (1)	$	64.4	$	85.5	$	26.8	$	15.2	$	40.2	$	10.3	$	3.8	$	29.3	$	7.0
AFUDC Equity	13.6		24.6		2.5		7.7		20.4		1.6		13.8		21.5		4.2
Investment (Loss)/Income	(1.3)		1.2		0.2		1.3		0.1		0.1		1.1		(0.8)		0.1
Interest Income	6.5		30.7		3.1		5.9		13.4		2.4		2.0		0.9		2.4
Other	0.1		0.7		0.1		0.1		0.7		0.2		0.1		1.1		0.1
Total Other Income, Net	$	83.3	$	142.7	$	32.7	$	30.2	$	74.8	$	14.6	$	20.8	$	52.0	$	13.8

(1)    See Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," for the components of net periodic benefit income/expense for the Pension, SERP and PBOP Plans. The non-service related components of pension, SERP and PBOP benefit income/expense, after capitalization or deferral, are presented as non-operating income and recorded in Other Income, Net on the statements of income.

(2)    Equity in earnings of unconsolidated affiliates includes $12.2 million and $2.1 million of pre-tax unrealized gains for the years ended December 31, 2022 and 2021, respectively, and $2.4 million of primarily realized gains for the year ended December 31, 2020, associated with an equity method investment in a renewable energy fund. Equity in earnings of unconsolidated affiliates for the year ended December 31, 2020 includes an other-than-temporary impairment of $2.8 million related to a write-off of an investment within a renewable energy fund. See Note 6, "Investments in Unconsolidated Affiliates," for Eversource’s equity method investments.

L.     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 Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Eversource	$	194.7	$	181.9	$	170.6
CL&P	166.1		158.1		149.9

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.  

M.     Supplemental Cash Flow Information

Eversource (Millions of Dollars)	As of and For the Years Ended December 31,
	2022		2021		2020
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	$	636.2	$	568.7	$	518.0
Income Taxes	77.9		121.6		48.9
Non-Cash Investing Activities:
Plant Additions Included in Accounts Payable (As of)	586.9		467.9		367.2

	As of and For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	$	167.2	$	152.8	$	58.3	$	161.5	$	141.6	$	56.5	$	149.0	$	129.4	$	54.5
Income Taxes	117.6		23.8		58.3		38.4		74.2		51.1		10.9		110.7		34.2
Non-Cash Investing Activities:
Plant Additions Included in Accounts   Payable (As of)	131.8		184.3		76.2		110.6		120.0		68.7		101.8		103.2		33.3

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 December 31,
	2022								2021
(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	$	374.6	$	11.3	$	327.7	$	0.1	$	66.8	$	55.8	$	0.7	$	—
Restricted cash included in:
Special Deposits	102.2		8.8		17.5		33.1		78.2		18.7		17.4		31.4
Marketable Securities	25.4		0.2		0.1		0.4		31.3		0.3		0.1		0.5
Other Long-Term Assets	19.6		—		—		3.2		44.7		—		—		3.2
Cash, Cash Equivalents and Restricted Cash     as reported on the Statements of Cash Flows	$	521.8	$	20.3	$	345.3	$	36.8	$	221.0	$	74.8	$	18.2	$	35.1

Special Deposits represent cash collections related to the PSNH RRB customer charges that are held in trust, required ISO-NE cash deposits, cash held in escrow accounts, and CYAPC and YAEC cash balances. The December 31, 2021 balance also included a $10 million customer assistance fund to provide bill payment assistance to certain existing non-hardship and hardship customers carrying arrearages at CL&P established under the terms of the PURA-approved October 2021 settlement agreement. Those customers were provided with $10 million of bill forgiveness in the first quarter of 2022, which represented a non-cash transaction. Special Deposits are included in Current Assets on the balance sheets. Restricted cash included in Marketable Securities represents money market funds held in trusts to fund certain non-qualified executive benefits and restricted trusts to fund CYAPC and YAEC's spent nuclear fuel storage obligations.

Restricted cash also includes an Energy Relief Fund for energy efficiency and clean energy measures in the Merrimack Valley and an additional energy efficiency program established under the terms of the EGMA 2020 settlement agreement. As of December 31, 2022, $20.0 million of this restricted cash was recorded as short-term in Special Deposits and $15.9 million was recorded in Other Long-Term Assets. As of December 31, 2021, this restricted cash totaled $41.5 million and was recorded in Other Long-Term Assets on the balance sheet.

Cash Equivalents at NSTAR Electric of $327.0 million related to a cash infusion by Eversource parent received in December 2022 recorded in a money market account.

N.     Related Parties

Eversource Service, Eversource's service company, provides centralized accounting, administrative, engineering, financial, information technology, legal, operational, planning, purchasing, tax, and other services to Eversource's companies.  The Rocky River Realty Company and Properties, Inc., two other Eversource subsidiaries, construct, acquire or lease some of the property and facilities used by Eversource's companies.

As of both December 31, 2022 and 2021, CL&P, NSTAR Electric and PSNH had long-term receivables from Eversource Service in the amounts of $25.0 million, $5.5 million and $3.8 million, respectively, which were included in Other Long-Term Assets on the balance sheets. These amounts related to the funding of investments held in trust by Eversource Service in connection with certain postretirement benefits for CL&P, NSTAR Electric and PSNH employees and have been eliminated in consolidation on the Eversource financial statements.  

Included in the CL&P, NSTAR Electric and PSNH balance sheets as of December 31, 2022 and 2021 were Accounts Receivable from Affiliated Companies and Accounts Payable to Affiliated Companies relating to transactions between CL&P, NSTAR Electric and PSNH and other subsidiaries that are wholly-owned by Eversource.  These amounts have been eliminated in consolidation on the Eversource financial statements.

The Eversource Energy Foundation is an independent not-for-profit charitable entity and is not included in the consolidated financial statements of Eversource as the Company does not have title to, and cannot receive contributions back from, the Eversource Energy Foundation's assets. Eversource made contributions to the Eversource Energy Foundation of $8.0 million in 2022 and $6.4 million in 2020 and did not make any contributions in 2021.

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REGULATORY ACCOUNTING

12 Months Ended

Dec. 31, 2022

Regulated Operations [Abstract]

REGULATORY ACCOUNTING

REGULATORY ACCOUNTING

Eversource's utility companies are subject to rate regulation that is based on cost recovery and meets the criteria for application of accounting guidance for rate-regulated operations, which considers the effect of regulation on the timing of the recognition of certain revenues and expenses. The regulated companies' financial statements reflect the effects of the rate-making process.  The rates charged to the customers of Eversource's regulated companies are designed to collect each company's costs to provide service, plus a return on investment.  

The application of accounting guidance for rate-regulated enterprises results in recording regulatory assets and liabilities.  Regulatory assets represent the deferral of incurred costs that are probable of future recovery in customer rates.  Regulatory assets are amortized as the incurred costs are recovered through customer rates.  Regulatory liabilities represent either revenues received from customers to fund expected costs that have not yet been incurred or probable future refunds to customers.

Management believes it is probable that each of the regulated companies will recover its respective investments in long-lived assets and the regulatory assets that have been recorded.  If management were to determine that it could no longer apply the accounting guidance applicable to rate-regulated enterprises, or if management could not conclude it is probable that costs would be recovered from customers in future rates, the applicable costs would be charged to net income in the period in which the determination is made.

Regulatory Assets:  The components of regulatory assets were as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Benefit Costs	$	921.7	$	156.7	$	299.5	$	56.6	$	1,481.0	$	272.4	$	395.5	$	118.9
Storm Costs, Net	1,379.1		799.3		484.4		95.4		1,102.7		695.6		341.3		65.8
Regulatory Tracking Mechanisms	1,075.3		216.8		391.5		73.7		1,050.5		333.6		376.6		85.4
Income Taxes, Net	853.3		491.1		115.6		16.0		790.7		470.5		112.6		17.5
Securitized Stranded Costs	435.7		—		—		435.7		478.9		—		—		478.9
Goodwill-related	281.0		—		241.2		—		297.8		—		255.7		—
Derivative Liabilities	181.8		181.8		—		—		249.2		249.2		—		—
Asset Retirement Obligations	127.9		35.9		68.2		4.4		115.0		33.6		59.8		4.1
Other Regulatory Assets	322.5		26.2		114.0		14.4		150.0		29.9		37.7		15.8
Total Regulatory Assets	5,578.3		1,907.8		1,714.4		696.2		5,715.8		2,084.8		1,579.2		786.4
Less:  Current Portion	1,335.5		314.1		492.8		102.2		1,129.1		371.6		444.0		107.2
Total Long-Term Regulatory Assets	$	4,242.8	$	1,593.7	$	1,221.6	$	594.0	$	4,586.7	$	1,713.2	$	1,135.2	$	679.2

Benefit Costs:   Deferred benefit costs represent unrecognized actuarial losses and gains and unrecognized prior service costs and credits attributable to Eversource's Pension, SERP and PBOP Plans. The regulated companies record actuarial losses and gains and prior service costs and credits arising at the December 31st remeasurement date of the funded status of the benefit plans as a regulatory asset or regulatory liability in lieu of a charge to Accumulated Other Comprehensive Income/(Loss), reflecting ultimate recovery from customers through rates.  The regulatory asset or regulatory liability is amortized with the recognition of actuarial losses and gains and prior service costs and credits to net periodic benefit expense/income over the estimated average future employee service period using the corridor approach.  Regulatory accounting is also applied to the portions of Eversource's service company costs that support the regulated companies, as these amounts are also recoverable.  As these regulatory assets or regulatory liabilities do not represent a cash outlay for the regulated companies, no carrying charge is recovered from customers. See Note 11A, "Employee Benefits - Pension Benefits and Postretirement Benefits Other Than Pension," for further information on regulatory benefit plan amounts arising and amortized during the year.

Eversource, CL&P, NSTAR Electric, and PSNH recover benefit costs related to their distribution and transmission operations from customers in rates as allowed by their applicable regulatory commissions.  NSTAR Electric, NSTAR Gas and EGMA recover qualified pension and PBOP expenses related to their distribution operations through a rate reconciling mechanism that fully tracks the change in net pension and PBOP expenses each year.  The electric transmission companies' rates provide for an annual true-up of estimated to actual costs, which include pension and PBOP expenses.

Storm Costs, Net: The storm cost deferrals relate to costs incurred for storm events at CL&P, NSTAR Electric and PSNH that each company expects to recover from customers.  A storm must meet certain criteria to qualify for deferral and recovery with the criteria specific to each state jurisdiction and utility company. Once a storm qualifies for recovery, all qualifying expenses incurred during storm restoration efforts are deferred and recovered from customers. Costs for storms that do not meet the specific criteria are expensed as incurred. In addition to storm restoration costs, CL&P and PSNH are each allowed to recover pre-staging storm costs. Management believes all storm costs deferred were prudently incurred and meet the criteria for specific cost recovery in Connecticut, Massachusetts and New Hampshire, and that recovery from customers is probable through the applicable regulatory recovery processes. Each electric utility company either recovers a carrying charge on its deferred storm cost regulatory asset balance or the regulatory asset balance is included in rate base.

Multiple tropical and severe storms over the past several years have caused extensive damage to Eversource’s electric distribution systems resulting in significant numbers and durations of customer outages, along with significant pre-staging costs. Storms in 2022 that qualified for future recovery resulted in deferred storm restoration costs and pre-staging costs totaling $399 million at Eversource, including $163 million at CL&P, $181 million at NSTAR Electric, and $55 million at PSNH. Management believes that all of these storm costs were prudently incurred and meet the criteria for specific cost recovery. Of Eversource’s total deferred storm costs, $1.40 billion either have yet to be filed with the applicable regulatory commission, are pending regulatory approval, or are subject to prudency review (including $807 million at CL&P, $492 million at NSTAR Electric and $98 million at PSNH) as of December 31, 2022. These storm cost totals exclude storm funding amounts that are collected in rates, which are recorded as a reduction to the deferred storm cost regulatory asset balance. NSTAR Electric and PSNH are seeking approval of their deferred storm restoration costs through the applicable regulatory recovery process. As part of CL&P’s October 1, 2021 settlement agreement, CL&P agreed to freeze its current base distribution rates (including storm costs) until no earlier than January 1, 2024. As a result, CL&P has not yet filed for approval of its storm costs in a regulatory proceeding.

CL&P Tropical Storm Isaias Costs: On August 4, 2020, Tropical Storm Isaias caused catastrophic damage to our electric distribution system, which resulted in significant numbers and durations of customer outages, primarily in Connecticut. In terms of customer outages, this storm was one of the worst in CL&P’s history. PURA will investigate the prudency of costs incurred by CL&P to restore service in response to Tropical Storm Isaias. That investigation is expected to occur either in a separate proceeding not yet initiated or as part of CL&P’s next rate review proceeding. Tropical Storm Isaias resulted in deferred storm restoration costs of approximately $235 million at CL&P as of December 31, 2022. Although PURA found that CL&P’s performance in its preparation for, and response to, Tropical Storm Isaias fell below applicable performance standards in certain instances, CL&P believes it will be able to present credible evidence in a future proceeding demonstrating there is no reasonably close causal connection between the alleged sub-standard performance and the storm costs incurred. While it is possible that some amount of storm costs may be disallowed by PURA in a future proceeding, any such amount cannot be estimated at this time. Eversource and CL&P continue to believe that these storm restoration costs associated with Tropical Storm Isaias were prudently incurred and meet the criteria for cost recovery; and as a result, management does not expect the storm cost review by PURA to have a material impact on the financial position or results of operations of Eversource or CL&P.

Regulatory Tracking Mechanisms:  The regulated companies' approved rates are designed to recover costs incurred to provide service to customers. The regulated companies recover certain of their costs on a fully-reconciling basis through regulatory commission-approved tracking mechanisms. The differences between the costs incurred (or the rate recovery allowed) and the actual revenues are recorded as regulatory assets (for undercollections) or as regulatory liabilities (for overcollections) to be included in future customer rates each year.  Carrying charges are recovered in rates on all material regulatory tracking mechanisms.

The electric and natural gas distribution companies recover, on a fully reconciling basis, the costs associated with the procurement of energy and natural gas supply, electric transmission related costs from FERC-approved transmission tariffs, energy efficiency programs, low income assistance programs, certain uncollectible accounts receivable for hardship customers, restructuring and stranded costs as a result of deregulation (including securitized RRB charges), certain capital tracking mechanisms for infrastructure improvements, and additionally for the Massachusetts utilities, pension and PBOP benefits, net metering for distributed generation, and solar-related programs.

CL&P, NSTAR Electric, Yankee Gas, NSTAR Gas, EGMA and the Aquarion Water Company of Connecticut each have a regulatory commission approved revenue decoupling mechanism. Distribution revenues are decoupled from customer sales volumes, where applicable, which breaks the relationship between sales volumes and revenues.  Each company reconciles its annual base distribution rate recovery amount to the pre-established levels of baseline distribution delivery service revenues. Any difference between the allowed level of distribution revenue and the actual amount realized during a 12-month period is adjusted through rates in the following period. 

Income Taxes, Net:  The tax effect of temporary book-tax differences (differences between the periods in which transactions affect income in the financial statements and the periods in which they affect the determination of taxable income, including those differences relating to uncertain tax positions) is accounted for in accordance with the rate-making treatment of the applicable regulatory commissions and accounting guidance for income taxes.  Differences in income taxes between the accounting guidance and the rate-making treatment of the applicable regulatory commissions are recorded as regulatory assets.  As these assets are offset by deferred income tax liabilities, no carrying charge is collected.  The amortization period of these assets varies depending on the nature and/or remaining life of the underlying assets and liabilities.  For further information regarding income taxes, see Note 12, "Income Taxes," to the financial statements.  

Securitized Stranded Costs: In 2018, a subsidiary of PSNH issued $635.7 million of securitized RRBs to finance PSNH's unrecovered remaining costs associated with the divestiture of its generation assets. Securitized regulatory assets, which are not earning an equity return, are being recovered over the amortization period of the associated RRBs. The PSNH RRBs are expected to be repaid by February 1, 2033. For further information, see Note 10, "Rate Reduction Bonds and Variable Interest Entities," to the financial statements.

Goodwill-related:  The goodwill regulatory asset originated from a 1999 transaction, and the DPU allowed its recovery in NSTAR Electric and NSTAR Gas rates.  This regulatory asset is currently being amortized and recovered from customers in rates without a carrying charge over a 40-year period, and as of December 31, 2022, there were 17 years of amortization remaining.

Derivative Liabilities:  Regulatory assets are recorded as an offset to derivative liabilities and relate to the fair value of contracts used to purchase energy and energy-related products that will be recovered from customers in future rates.  These assets are excluded from rate base and are being recovered as the actual settlements occur over the duration of the contracts.  See Note 4, "Derivative Instruments," to the financial statements for further information on these contracts.

Asset Retirement Obligations: The costs associated with the depreciation of the regulated companies' ARO assets and accretion of the ARO liabilities are recorded as regulatory assets in accordance with regulatory accounting guidance. The regulated companies' ARO assets, regulatory assets, and ARO liabilities offset and are excluded from rate base. These costs are being recovered over the life of the underlying property, plant and equipment.

Other Regulatory Assets:  Other Regulatory Assets primarily include environmental remediation costs, certain uncollectible accounts receivable for hardship customers, certain exogenous property taxes and merger-related costs allowed for recovery, contractual obligations associated with the spent nuclear fuel storage costs of the CYAPC, YAEC and MYAPC decommissioned nuclear power facilities, water tank painting costs, losses associated with the reacquisition or redemption of long-term debt, and various other items.

Regulatory Costs in Long-Term Assets:  Eversource's regulated companies had $210.8 million (including $135.9 million for CL&P, $19.8 million for NSTAR Electric and $1.0 million for PSNH) and $252.5 million (including $114.9 million for CL&P, $85.0 million for NSTAR Electric and $3.4 million for PSNH) of additional regulatory costs as of December 31, 2022 and 2021, respectively, that were included in long-term assets on the balance sheets.  These amounts represent incurred costs for which recovery has not yet been specifically approved by the applicable regulatory agency.  However, based on regulatory policies or past precedent on similar costs, management believes it is probable that these costs will ultimately be approved and recovered from customers in rates.  As of December 31, 2022 and 2021, these regulatory costs included incremental COVID-19 related non-tracked uncollectible expense deferred of $29.8 million and $33.0 million at Eversource, $11.8 million and $18.0 million at CL&P, and $2.2 million and $6.1 million at NSTAR Electric, respectively.

Equity Return on Regulatory Assets:  For rate-making purposes, the regulated companies recover the carrying costs related to their regulatory assets.  For certain regulatory assets, the carrying cost recovered includes an equity return component.  This equity return is not recorded on the balance sheets. The equity return for PSNH was $4.1 million and $5.0 million as of December 31, 2022 and 2021, respectively. These carrying costs will be recovered from customers in future rates.  

Regulatory Liabilities:  The components of regulatory liabilities were as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
EDIT due to Tax Cuts and Jobs Act of 2017	$	2,619.3	$	983.6	$	944.3	$	348.6	$	2,685.2	$	996.1	$	984.5	$	359.2
Cost of Removal	670.6		130.8		405.3		14.7		649.6		100.1		381.0		17.2
Regulatory Tracking Mechanisms	890.8		361.0		336.1		155.0		448.4		182.0		185.1		107.0
Deferred Portion of Non-Service Income    Components of Pension, SERP and PBOP	270.9		34.5		139.7		28.8		148.3		12.0		90.7		14.9
Benefit Costs	55.4		0.7		31.4		—		133.5		—		107.4		—
AFUDC - Transmission	98.2		48.2		50.0		—		81.0		43.2		37.8		—
CL&P Settlement Agreement and Storm    Performance Penalty	—		—		—		—		81.3		81.3		—		—
Other Regulatory Liabilities	215.9		40.6		14.5		6.5		241.4		45.1		0.8		3.3
Total Regulatory Liabilities	4,821.1		1,599.4		1,921.3		553.6		4,468.7		1,459.8		1,787.3		501.6
Less:  Current Portion	890.8		336.0		373.2		162.0		602.4		266.5		228.2		120.2
Total Long-Term Regulatory Liabilities	$	3,930.3	$	1,263.4	$	1,548.1	$	391.6	$	3,866.3	$	1,193.3	$	1,559.1	$	381.4

EDIT due to Tax Cuts and Jobs Act of 2017: Pursuant to the Tax Cuts and Jobs Act of 2017, Eversource had remeasured its existing deferred federal income tax balances to reflect the decrease in the U.S. federal corporate income tax rate from 35 percent to 21 percent. The remeasurement resulted in provisional regulated excess accumulated deferred income tax (excess ADIT or EDIT) liabilities that will benefit customers in future periods and were recognized as regulatory liabilities on the balance sheet. EDIT liabilities related to property, plant, and equipment are subject to IRS normalization rules and will be returned to customers using the same timing as the remaining useful lives of the underlying assets that gave rise to the ADIT liabilities. Eversource's regulated companies (except for the Connecticut water business) are in the process of refunding the EDIT liabilities to customers based on orders issued by applicable state and federal regulatory commissions.

Cost of Removal:  Eversource's regulated companies currently recover amounts in rates for future costs of removal of plant assets over the lives of the assets.  The estimated cost to remove utility assets from service is recognized as a component of depreciation expense, and the cumulative amount collected from customers but not yet expended is recognized as a regulatory liability.  

Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP:  Regulatory liabilities were recorded for the deferred portion of the non-service related components of net periodic benefit expense/(income) for the Pension, SERP and PBOP Plans. These regulatory liabilities will be amortized over the remaining useful lives of the various classes of utility property, plant and equipment.

AFUDC - Transmission:  Regulatory liabilities were recorded by CL&P and NSTAR Electric for AFUDC accrued on certain reliability-related transmission projects to reflect local rate base recovery.  These regulatory liabilities will be amortized over the depreciable life of the related transmission assets.

CL&P Settlement Agreement and Storm Performance Penalty:  On April 28, 2021, PURA issued a final decision on CL&P’s compliance with its emergency response plan that concluded CL&P failed to comply with certain storm performance standards and was imprudent in certain instances. A $28.4 million performance penalty assessed by PURA was recorded within current regulatory liabilities on CL&P’s balance sheet and was credited to customers on electric bills beginning on September 1, 2021 over a one-year period. On October 1, 2021, CL&P entered into a settlement agreement with the DEEP, Office of Consumer Counsel, Office of the Attorney General and the Connecticut Industrial Energy Consumers, resolving certain issues that arose in then-pending regulatory proceedings initiated by PURA. PURA approved the settlement agreement on October 27, 2021. CL&P recorded a current regulatory liability of $75 million on the balance sheet associated with the provisions of the settlement agreement. Customer credits of $65 million were distributed based on customer sales over a two-month billing period from December 1, 2021 to January 31, 2022. CL&P also irrevocably set aside $10 million in a customer assistance fund to provide bill payment assistance to certain existing non-hardship and hardship customers carrying arrearages. Those customers were provided with $10 million of bill forgiveness in the first quarter of 2022. The balance as of December 31, 2021 represented the reserve for customer credits not yet issued and bill payment assistance not yet provided. See Note 13G, “Commitments and Contingencies - CL&P Regulatory Matters,” for further information.

Other Regulatory Liabilities:  Other Regulatory Liabilities primarily include EGMA’s acquired regulatory liability as a result of the 2020 DPU-approved rate settlement agreement and the CMA asset acquisition on October 9, 2020, and various other items.

FERC ROE Complaints:  As of December 31, 2022, Eversource has a reserve established for the second ROE complaint period in the pending FERC ROE complaint proceedings, which was recorded as a regulatory liability and is reflected within Regulatory Tracking Mechanisms in the table above.  The cumulative pre-tax reserve (excluding interest) as of December 31, 2022 totaled $39.1 million for Eversource (including $21.4 million for CL&P, $14.6 million for NSTAR Electric and $3.1 million for PSNH). See Note 13E, "Commitments and Contingencies – FERC ROE Complaints," for further information on developments in the pending ROE complaint proceedings.

Recent Regulatory Developments:

CL&P Rate Relief Plan: On November 28, 2022, Governor Lamont, DEEP, Office of Consumer Counsel, and CL&P jointly developed a rate relief plan for electric customers for the winter peak season of January 1, 2023 through April 30, 2023. On December 16, 2022, PURA approved the rate relief plan. As part of the rate relief plan, CL&P reduced the Non-Bypassable Federally Mandated Congestion Charge (NBFMCC) rate effective January 1, 2023 to provide customers with an average $10 monthly bill credit from January through April 2023. This rate reduction accelerates the return to customers of net revenues generated by long-term state-approved energy contracts with the Millstone and Seabrook nuclear power plants of approximately $90 million. The rate relief plan also included instituting a temporary, flat monthly discount for qualifying low-income hardship customers effective January 1, 2023. This flat-rate credit will continue until a new low-income discount rate that was approved by PURA in an October 19, 2022 decision is implemented in 2024. These aspects of the rate relief plan do not impact CL&P’s earnings but do impact its future cash flows. Also as part of the rate relief plan, CL&P committed to contribute $10 million to an energy assistance program for qualifying hardship customers, which is expected to be distributed as a bill credit to those customers by the end of the first quarter of 2023. CL&P recorded a current liability of $10 million on the balance sheet and a charge to expense on the statement of income for the year ended December 31, 2022 associated with the customer assistance program.

NSTAR Electric Distribution Rate Case: On November 30, 2022, the DPU issued its decision in the NSTAR Electric distribution rate case and approved a base distribution rate increase of $64 million effective January 1, 2023. The DPU approved a renewal of the performance-based ratemaking (PBR) plan originally authorized in its previous rate case for a five-year term, with a corresponding stay out provision. The PBR plan term has the possibility of a five-year extension. The PBR mechanism allows for an annual adjustment to base distribution rates for inflation and exogenous events. The DPU also allowed for adjustments to the PBR mechanism for the recovery of future capital additions based on a historical five-year average of total capital additions, beginning with the January 1, 2024 PBR adjustment. The decision allows an authorized regulatory ROE of 9.80 percent on a capital structure including 53.2 percent equity.

Among other items, the DPU approved an increase to the annual storm fund contribution collected through base distribution rates from $10 million to $31 million, and allowed for the recovery of storm threshold costs of $1.3 million per storm event subsequent to the eighth storm in a calendar year (six recovered in base rates plus two additional storms). The DPU approved cost recovery of a portion of NSTAR Electric’s outstanding storm costs beginning on January 1, 2023 and January 1, 2024, subject to reconciliation from future prudency reviews. In a subsequent compliance filing, the DPU allowed recovery to commence for outstanding storm costs occurring between 2018 and 2022 and interest in a total of $162.1 million over a five-year period starting January 1, 2023. In addition, NSTAR Electric will begin to recover 2021 exogenous storms and interest in a total of $220.9 million over a five-year period beginning January 1, 2024. The DPU also approved the recovery of historical exogenous property taxes of $30.8 million incurred from 2020 through 2022 over a two-year period and $8.3 million incurred from 2012 through 2015 over a five-year period effective January 1, 2023. As a result of this decision, these deferred property taxes were reclassified from Other Long-Term Assets to Regulatory Assets on the NSTAR Electric balance sheet.

NSTAR Gas Distribution Rates: As part of an inflation-based mechanism, NSTAR Gas submitted its second annual Performance Based Rate Adjustment filing on September 15, 2022 and on October 31, 2022, the DPU approved a $21.7 million increase to base distribution rates for effect on November 1, 2022. The increase is inclusive of a $4.5 million permanent increase related to exogenous property taxes and a $5.4 million increase related to an October 6, 2021 mitigation plan filing that delayed recovery of a portion of a base distribution rate increase originally scheduled to take effect November 1, 2021. The DPU also approved the recovery of historical exogenous property taxes incurred from November 1, 2020 through October 31, 2022 of $8.2 million over a two-year period through a separate reconciling mechanism effective November 1, 2022. As a result of this decision, these deferred property taxes were reclassified from Other Long-Term Assets to Regulatory Assets on the Eversource balance sheet.

EGMA Distribution Rates: As established in an October 7, 2020 EGMA Rate Settlement Agreement approved by the DPU, on September 16, 2022 EGMA filed for its second base distribution rate increase and on October 31, 2022, the DPU approved a $6.7 million increase to base distribution rates and a $3.3 million increase to the Tax Act Credit Factor for effect on November 1, 2022. The DPU also approved the recovery of historical exogenous property taxes incurred from November 1, 2020 through October 31, 2022 of $8.6 million over a two-year period through a separate reconciling mechanism effective November 1, 2022. EGMA will request recovery of incremental property taxes incurred after October 31, 2022 in future exogenous filings. As a result of this decision, these deferred property taxes were reclassified from Other Long-Term Assets to Regulatory Assets on the Eversource balance sheet.

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PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment [Abstract]

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION

Utility property, plant and equipment is recorded at original cost.  Original cost includes materials, labor, construction overheads and AFUDC for regulated property.  The cost of repairs and maintenance is charged to Operations and Maintenance expense as incurred.  

The following tables summarize property, plant and equipment by asset category:

Eversource	As of December 31,
(Millions of Dollars)	2022		2021
Distribution - Electric	$	18,326.2	$	17,679.1
Distribution - Natural Gas	7,443.8		6,694.8
Transmission - Electric	13,709.3		12,882.4
Distribution - Water	2,112.6		1,900.9
Solar	200.8		200.9
Utility	41,792.7		39,358.1
Other (1)	1,738.1		1,469.5
Property, Plant and Equipment, Gross	43,530.8		40,827.6
Less:  Accumulated Depreciation
Utility	(9,167.4)		(8,885.2)
Other	(706.1)		(580.1)
Total Accumulated Depreciation	(9,873.5)		(9,465.3)
Property, Plant and Equipment, Net	33,657.3		31,362.3
Construction Work in Progress	2,455.5		2,015.4
Total Property, Plant and Equipment, Net	$	36,112.8	$	33,377.7

	As of December 31,
	2022						2021
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Distribution - Electric	$	7,370.1	$	8,410.0	$	2,586.4	$	7,117.6	$	8,105.5	$	2,496.2
Transmission - Electric	6,165.1		5,333.8		2,212.0		5,859.0		5,090.5		1,934.6
Solar	—		200.8		—		—		200.9		—
Property, Plant and Equipment, Gross	13,535.2		13,944.6		4,798.4		12,976.6		13,396.9		4,430.8
Less:  Accumulated Depreciation	(2,567.1)		(3,381.2)		(912.3)		(2,572.1)		(3,227.3)		(908.4)
Property, Plant and Equipment, Net	10,968.1		10,563.4		3,886.1		10,404.5		10,169.6		3,522.4
Construction Work in Progress	498.9		1,063.6		174.1		399.0		707.0		134.1
Total Property, Plant and Equipment, Net	$	11,467.0	$	11,627.0	$	4,060.2	$	10,803.5	$	10,876.6	$	3,656.5

(1)These assets are primarily comprised of computer software, hardware and equipment at Eversource Service and buildings at The Rocky River Realty Company.

Depreciation: Depreciation of utility assets is calculated on a straight-line basis using composite rates based on the estimated remaining useful lives of the various classes of property (estimated useful life for PSNH distribution and the water utilities).  The composite rates, which are subject to approval by the appropriate state regulatory agency, include a cost of removal component, which is collected from customers over the lives of the plant assets and is recognized as a regulatory liability.  Depreciation rates are applied to property from the time it is placed in service.

Upon retirement from service, the cost of the utility asset is charged to the accumulated provision for depreciation.  The actual incurred removal costs are applied against the related regulatory liability.  

The depreciation rates for the various classes of utility property, plant and equipment aggregate to composite rates as follows:

(Percent)	2022		2021		2020
Eversource	3.0	%	3.1	%	3.0	%
CL&P	2.8	%	2.8	%	2.8	%
NSTAR Electric	2.7	%	2.8	%	2.8	%
PSNH	3.0	%	3.1	%	2.8	%

The following table summarizes average remaining useful lives of depreciable assets:

	As of December 31, 2022
(Years)	Eversource	CL&P	NSTAR Electric	PSNH
Distribution - Electric	34.2	35.0	34.6	30.8
Distribution - Natural Gas	37.4	—	—	—
Transmission - Electric	39.8	36.3	45.2	39.3
Distribution - Water	39.0	—	—	—
Solar	22.9	—	22.9	—
Other (1)	11.0	—	—	—

(1)The estimated useful life of computer software, hardware and equipment primarily ranges from 5 to 15 years and of buildings is 40 years.

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DERIVATIVE INSTRUMENTS

12 Months Ended

Dec. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS

DERIVATIVE INSTRUMENTS

The electric and natural gas companies purchase and procure energy and energy-related products, which are subject to price volatility, for their customers.  The costs associated with supplying energy to customers are recoverable from customers in future rates.  These regulated companies manage the risks associated with the price volatility of energy and energy-related products through the use of derivative and non-derivative contracts.

Many of the derivative contracts meet the definition of, and are designated as, normal and qualify for accrual accounting under the applicable accounting guidance.  The costs and benefits of derivative contracts that meet the definition of normal are recognized in Operating Expenses on the statements of income as electricity or natural gas is delivered.

Derivative contracts that are not designated as normal are recorded at fair value as current or long-term Derivative Assets or Derivative Liabilities on the balance sheets.  For the electric and natural gas companies, regulatory assets or regulatory liabilities are recorded to offset the fair values of derivatives, as contract settlement amounts are recovered from, or refunded to, customers in their respective energy supply rates.  

The gross fair values of derivative assets and liabilities with the same counterparty are offset and reported as net Derivative Assets or Derivative Liabilities, with current and long-term portions, on the balance sheets.  The following table presents the gross fair values of contracts, categorized by risk type, and the net amounts recorded as current or long-term derivative assets or liabilities:

		As of December 31,
		2022						2021
CL&P (Millions of Dollars)	Fair Value Hierarchy	Commodity Supply and Price Risk Management		Netting (1)		Net Amount Recorded as a Derivative		Commodity Supply and Price Risk Management		Netting (1)		Net Amount Recorded as a Derivative
Current Derivative Assets	Level 3	$	16.3	$	(0.5)	$	15.8	$	14.7	$	(1.0)	$	13.7
Long-Term Derivative Assets	Level 3	28.8		(0.9)		27.9		46.9		(0.9)		46.0
Current Derivative Liabilities	Level 3	(81.6)		—		(81.6)		(73.5)		—		(73.5)
Long-Term Derivative Liabilities	Level 3	(143.9)		—		(143.9)		(235.4)		—		(235.4)

(1)     Amounts represent derivative assets and liabilities that Eversource elected to record net on the balance sheets.  These amounts are subject to master netting agreements or similar agreements for which the right of offset exists.

The business activities that result in the recognition of derivative assets also create exposure to various counterparties.  As of December 31, 2022, CL&P's derivative assets were exposed to counterparty credit risk and contracted with investment grade entities.

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 December 31, 2022 and 2021 were 674 MW and 675 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 years ended December 31, 2022, 2021 and 2020, there were gains of $10.1 million and losses of $7.1 million and $21.2 million, respectively, deferred as regulatory costs, which reflect the change in fair value associated with Eversource's derivative contracts.

Fair Value Measurements of Derivative Instruments

The fair value of derivative contracts classified as Level 3 utilizes both significant observable and unobservable inputs.  The fair value is modeled using income techniques, such as discounted cash flow valuations adjusted for assumptions related to exit price. Valuations of derivative contracts using a discounted cash flow methodology include assumptions regarding the timing and likelihood of scheduled payments and also reflect non-performance risk, including credit, using the default probability approach based on the counterparty’s credit rating for assets and the Company’s credit rating for liabilities.  Significant observable inputs for valuations of these contracts include energy-related product prices in future years for which quoted prices in an active market exist. Valuations incorporate estimates of premiums or discounts that would be required by a market participant to arrive at an exit price, using historical market transactions adjusted for the terms of the contract.  Fair value measurements categorized in Level 3 of the fair value hierarchy are prepared by individuals with expertise in valuation techniques, pricing of energy-related products, and accounting requirements.    

The following is a summary of the significant unobservable inputs utilized in the valuations of the derivative contracts classified as Level 3:

	As of December 31,
	2022								2021
CL&P	Range				Average			Period Covered	Range				Average			Period Covered
Forward Reserve Prices	$	0.44	—	$0.50	$	0.47	per kW-Month	2023 - 2024	$	0.50	—	$1.15	$	0.82	per kW-Month	2022 - 2024

Exit price premiums of 2.9 percent through 7.1 percent, or a weighted average of 6.1 percent, are also Level 3 significant unobservable inputs applied to these contracts and reflect the uncertainty and illiquidity premiums that would be required based on the most recent market activity available for similar type contracts. The risk premium was weighted by the relative fair value of the net derivative instruments.

As of December 31, 2021, Level 3 unobservable inputs also utilized in the valuation of CL&P’s capacity-related contracts included capacity prices of $2.61 per kW-Month over the period 2025 through 2026. Beginning in the first quarter of 2022, these capacity price inputs are now observable.

Significant increases or decreases in future capacity or forward reserve prices in isolation would decrease or increase, respectively, the fair value of the derivative liability.  Any increases in risk premiums would increase the fair value of the derivative liability.  Changes in these fair values are recorded as a regulatory asset or liability and do not impact net income.  

The following table presents changes in the Level 3 category of derivative assets and derivative liabilities measured at fair value on a recurring basis.  The derivative assets and liabilities are presented on a net basis.

CL&P (Millions of Dollars)	For the Years Ended December 31,
	2022		2021
Derivatives, Net:
Fair Value as of Beginning of Period	$	(249.2)	$	(293.1)
Net Realized/Unrealized Gains/(Losses) Included in Regulatory Assets	10.1		(8.5)
Settlements	57.3		52.4
Fair Value as of End of Period	$	(181.8)	$	(249.2)

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MARKETABLE SECURITIES

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

MARKETABLE SECURITIES

MARKETABLE SECURITIES

Eversource holds marketable securities that are primarily used to fund certain non-qualified executive benefits.  The trusts that hold these marketable securities are not subject to regulatory oversight by state or federal agencies.  Eversource’s marketable securities also include the CYAPC and YAEC legally restricted trusts that each hold equity and available-for-sale debt securities to fund the spent nuclear fuel removal obligations of their nuclear fuel storage facilities. Equity and available-for-sale debt marketable securities are recorded at fair value, with the current portion recorded in Prepayments and Other Current Assets and the long-term portion recorded in Marketable Securities on the balance sheets.

Equity Securities: Unrealized gains and losses on equity securities held in Eversource's non-qualified executive benefit trust are recorded in Other Income, Net on the statements of income. The fair value of these equity securities as of December 31, 2022 and 2021 was $20.0 million and $40.2 million, respectively.  For the years ended December 31, 2022, 2021 and 2020, there were unrealized losses of $9.7 million and unrealized gains of $4.4 million and $3.7 million recorded in Other Income, Net related to these equity securities, respectively.

Eversource's equity securities also include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts, which had fair values of $170.1 million and $214.0 million as of December 31, 2022 and 2021, respectively.  Unrealized gains and losses for these spent nuclear fuel trusts are subject to regulatory accounting treatment and are recorded in Marketable Securities with the corresponding offset to long-term liabilities on the balance sheets, with no impact on the statements of income.

Available-for-Sale Debt Securities:  The following is a summary of the available-for-sale debt securities:

	As of December 31,
	2022								2021
Eversource (Millions of Dollars)	Amortized Cost		Pre-Tax Unrealized Gains		Pre-Tax Unrealized Losses		Fair Value		Amortized Cost		Pre-Tax Unrealized Gains		Pre-Tax Unrealized Losses		Fair Value
Debt Securities	$	201.6	$	0.1	$	(16.2)	$	185.5	$	214.5	$	5.1	$	(0.2)	$	219.4

Unrealized gains and losses on available-for-sale debt securities held in Eversource's non-qualified executive benefit trust are recorded in Accumulated Other Comprehensive Income, excluding amounts related to credit losses or losses on securities intended to be sold, which are recorded in Other Income, Net. There have been no credit losses for the years ended December 31, 2022 and 2021, and no allowance for credit losses as of December 31, 2022. Factors considered in determining whether a credit loss exists include adverse conditions specifically affecting the issuer, the payment history, ratings and rating changes of the security, and the severity of the impairment.  For asset-backed debt securities, underlying collateral and expected future cash flows are also evaluated. Debt securities included in Eversource's non-qualified benefit trust portfolio are investment-grade bonds with a lower default risk based on their credit quality.

Eversource's debt securities also include CYAPC's and YAEC's marketable securities held in spent nuclear fuel trusts in the amounts of $163.2 million and $189.9 million as of December 31, 2022 and 2021, respectively. 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. Pre-tax unrealized gains and losses as of December 31, 2022 and 2021 primarily relate to the debt securities included in CYAPC's and YAEC's spent nuclear fuel trusts.

As of December 31, 2022, the contractual maturities of available-for-sale debt securities were as follows:    

Eversource (Millions of Dollars)	Amortized Cost		Fair Value
Less than one year (1)	$	28.5	$	28.3
One to five years	43.8		42.4
Six to ten years	35.6		32.3
Greater than ten years	93.7		82.5
Total Debt Securities	$	201.6	$	185.5

(1)     Amounts in the Less than one year category include securities in the CYAPC and YAEC spent nuclear fuel trusts, which are restricted and are classified in long-term Marketable Securities on the balance sheets.

Realized Gains and Losses:  Realized gains and losses are recorded in Other Income, Net for Eversource's benefit trust and are offset in long-term liabilities for CYAPC and YAEC.  Eversource utilizes the specific identification basis method for the Eversource non-qualified benefit trust, and the average cost basis method for the CYAPC and YAEC spent nuclear fuel trusts to compute the realized gains and losses on the sale of marketable securities.

Fair Value Measurements:  The following table presents the marketable securities recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy:

Eversource (Millions of Dollars)	As of December 31,
	2022		2021
Level 1:
Mutual Funds and Equities	$	190.1	$	254.2
Money Market Funds	25.4		31.3
Total Level 1	$	215.5	$	285.5
Level 2:
U.S. Government Issued Debt Securities (Agency and Treasury)	$	82.3	$	81.3
Corporate Debt Securities	46.1		65.3
Asset-Backed Debt Securities	8.6		12.6
Municipal Bonds	12.7		12.3
Other Fixed Income Securities	10.4		16.6
Total Level 2	$	160.1	$	188.1
Total Marketable Securities	$	375.6	$	473.6

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.

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INVESTMENTS IN UNCONSOLIDATED AFFILIATES

12 Months Ended

Dec. 31, 2022

Equity Method Investments and Joint Ventures [Abstract]

INVESTMENTS IN UNCONSOLIDATED AFFILIATES

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 as of December 31,
(Millions of Dollars)	Ownership Interest		2022		2021
Offshore Wind Business - North East Offshore	50	%	$	1,947.1	$	1,213.6
Natural Gas Pipeline - Algonquin Gas Transmission, LLC	15	%	118.8		121.9
Renewable Energy Investment Fund	90	%	84.1		76.5
Other	various		26.1		24.3
Total Investments in Unconsolidated Affiliates			$	2,176.1	$	1,436.3

For the years ended December 31, 2022, 2021 and 2020, Eversource had equity in earnings of unconsolidated affiliates of $22.9 million, $14.2 million, and $14.2 million, respectively. Eversource received dividends from its equity method investees of $26.2 million, $21.6 million, and $21.8 million, respectively, for the years ended December 31, 2022, 2021 and 2020.

Investments in affiliates where Eversource has the ability to exercise significant influence, but not control, over an investee are initially recognized as an equity method investment at cost. Any differences between the cost of an investment and the amount of underlying equity in net assets of an investee are considered basis differences, and are determined based upon the estimated fair values of the investee's identifiable assets and liabilities. The carrying amount of Eversource’s offshore wind investments exceeded its share of underlying equity in net assets by $343.1 million and $300.4 million, respectively, as of December 31, 2022 and 2021. As of December 31, 2022, these basis differences are primarily comprised of $168.9 million of equity method goodwill that is not being amortized, intangible assets for PPAs, and capitalized interest.

Offshore Wind Business: Eversource's offshore wind business includes a 50 percent ownership interest in North East Offshore, which holds PPAs and contracts for the Revolution Wind, South Fork Wind and Sunrise Wind projects, as well as an undeveloped offshore lease area. The offshore wind investment includes capital expenditures for the three offshore wind projects, as well as capitalized costs related to future development, acquisition costs of offshore lease areas, and capitalized interest. Cash flows used in investing activities presented in Investments in Unconsolidated Affiliates on the statements of cash flows primarily relates to capital contributions in the offshore wind investment.

On May 4, 2022, Eversource announced that it had initiated a strategic review of its offshore wind investment portfolio. As part of that review, Eversource is exploring strategic alternatives that could result in a potential sale of all, or part, of its 50 percent interest in its offshore wind partnership with Ørsted. In late July, Eversource started preliminary and targeted outreach to interested parties. Eversource continues to work with interested parties through this ongoing process and expects to complete this review in the second quarter of 2023. Eversource’s strategic review of its offshore wind investment does not impact the presentation of the December 31, 2022 financial statements.

NSTAR Electric: As of December 31, 2022 and 2021, NSTAR Electric's investments included a 14.5 percent ownership interest in two companies that transmit hydro-electricity imported from the Hydro-Quebec system in Canada of $9.3 million and $9.0 million, respectively.

Impairment of Equity Method Investments: Equity method investments are assessed for impairment when conditions exist that indicate that the fair value of the investment is less than book value. If the decline in value is considered to be other-than-temporary, the investment is written down to its estimated fair value, which establishes a new cost basis in the investment. Impairment evaluations involve a significant degree of judgment and estimation, including identifying circumstances that indicate an impairment may exist at the equity method investment level, selecting discount rates used to determine fair values, and developing an estimate of discounted future cash flows expected from investment operations or the sale of the investment. No impairments occurred during the year 2022. Eversource continually monitors and evaluates its equity method investments to determine if there are indicators of an other-than-temporary impairment.

Eversource believes that the fair market value of its offshore wind investment is greater than the carrying value based upon management’s expectation for future cash flows arising from the sale of all, or part, of its investment. There are uncertainties in a sale process, and there could be changes in market conditions that would impact Eversource’s ability to sell this investment or the value it would receive for these assets. In the event that the strategic review does not result in the sale of the offshore wind business or that a sale of the offshore wind business is significantly delayed or at lower than expected value from these changes in market conditions driven by unfavorable developments, such as scheduling or permitting delays, increases in cost estimates, changes to tax laws impacting the project’s ability to monetize tax attributes, higher interest rates, and increases in the discount rate, it could result in Eversource having to evaluate whether or not its investment is impaired. Any resulting impairment charge could have a material adverse effect on the financial position and results of operations.

During the year ended December 31, 2020, Eversource recorded an other-than-temporary impairment of $2.8 million within Other Income, Net on the statement of income, related to a write-off of an investment within a renewable energy fund.

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ASSET RETIREMENT OBLIGATIONS

12 Months Ended

Dec. 31, 2022

Asset Retirement Obligation Disclosure [Abstract]

ASSET RETIREMENT OBLIGATIONS

ASSET RETIREMENT OBLIGATIONS

Eversource, including CL&P, NSTAR Electric and PSNH, recognizes a liability for the fair value of an ARO on the obligation date if the liability's fair value can be reasonably estimated, even if it is conditional on a future event.  Settlement dates and future costs are reasonably estimated when sufficient information becomes available.  Management has identified various categories of AROs, primarily CYAPC's and YAEC's obligation to dispose of spent nuclear fuel and high level waste, and also certain assets containing asbestos and hazardous contamination. Management has performed fair value calculations reflecting expected probabilities for settlement scenarios.

The fair value of an ARO is recorded as a long-term liability with a corresponding amount included in Property, Plant and Equipment, Net on the balance sheets.  The ARO assets are depreciated, and the ARO liabilities are accreted over the estimated life of the obligation and the corresponding credits are recorded as accumulated depreciation and ARO liabilities, respectively.  As the electric and natural gas companies are rate-regulated on a cost-of-service basis, these companies apply regulatory accounting guidance and both the depreciation and accretion costs associated with these companies' AROs are recorded as increases to Regulatory Assets on the balance sheets.  

A reconciliation of the beginning and ending carrying amounts of ARO liabilities is as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Balance as of Beginning of Year	$	500.1	$	35.0	$	97.5	$	4.7	$	499.7	$	33.4	$	91.8	$	4.4
Liabilities Settled During the Year	(22.3)		—		—		—		(23.9)		(0.6)		—		—
Accretion	28.9		2.4		4.1		0.2		29.4		2.2		4.0		0.3
Revisions in Estimated Cash Flows	(4.0)		—		(0.3)		—		(5.1)		—		1.7		—
Balance as of End of Year	$	502.7	$	37.4	$	101.3	$	4.9	$	500.1	$	35.0	$	97.5	$	4.7

Eversource's amounts include CYAPC and YAEC's AROs of $320.5 million and $325.9 million as of December 31, 2022 and 2021, respectively. The fair value of the ARO for CYAPC and YAEC includes uncertainties of the fuel off-load dates related to the DOE's timing of performance regarding its obligation to dispose of the spent nuclear fuel and high level waste and other assumptions, including discount rates.  The incremental asset recorded as an offset to the ARO liability was fully depreciated since the plants have no remaining useful life.  Any changes in the ARO liability are recorded with a corresponding offset to the related regulatory asset.  The assets held in the CYAPC and YAEC spent nuclear fuel trusts are restricted for settling the ARO and all other nuclear fuel storage obligations.  For further information on the assets held in the spent nuclear fuel trusts, see Note 5, "Marketable Securities," to the financial statements.

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SHORT-TERM DEBT

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

SHORT-TERM DEBT

SHORT-TERM DEBT

Short-Term Debt - Borrowing Limits:  The amount of short-term borrowings that may be incurred by CL&P and NSTAR Electric is subject to periodic approval by the FERC.  Because the NHPUC has jurisdiction over PSNH's short-term debt, PSNH is not currently required to obtain FERC approval for its short-term borrowings.  On December 3, 2021, the FERC granted authorization that allows CL&P to issue total short-term borrowings in an aggregate principal amount not to exceed $600 million outstanding at any one time, through December 31, 2023.  On December 3, 2021, the FERC granted authorization that allows NSTAR Electric to issue total short-term borrowings in an aggregate principal amount not to exceed $655 million outstanding at any one time, through December 31, 2023.

PSNH is authorized by regulation of the NHPUC to incur short-term borrowings up to 10 percent of net fixed plant plus an additional $60 million until further ordered by the NHPUC.  As of December 31, 2022, PSNH's short-term debt authorization under the 10 percent of net fixed plant test plus $60 million totaled $443.5 million.

CL&P's certificate of incorporation contains preferred stock provisions restricting the amount of unsecured debt that CL&P may incur, including limiting unsecured indebtedness with a maturity of less than 10 years to 10 percent of total capitalization.  As of December 31, 2022, CL&P had $1.01 billion of unsecured debt capacity available under this authorization.

Yankee Gas, NSTAR Gas and EGMA are not required to obtain approval from any state or federal authority to incur short-term debt.

Short-Term Debt - Commercial Paper Programs and Credit Agreements: Eversource parent has a $2.00 billion commercial paper program allowing Eversource parent to issue commercial paper as a form of short-term debt. Eversource parent, CL&P, PSNH, NSTAR Gas, Yankee Gas, EGMA and Aquarion Water Company of Connecticut are parties to a five-year $2.00 billion revolving credit facility, which terminates on October 15, 2027. This revolving credit facility serves to backstop Eversource parent's $2.00 billion commercial paper program.

NSTAR Electric has a $650 million commercial paper program allowing NSTAR Electric to issue commercial paper as a form of short-term debt. NSTAR Electric is also a party to a five-year $650 million revolving credit facility, which terminates on October 15, 2027. This revolving credit facility serves to backstop NSTAR Electric's $650 million commercial paper program.

The amount of borrowings outstanding and available under the commercial paper programs were as follows:

	Borrowings Outstanding  as of December 31,				Available Borrowing Capacity as of December 31,				Weighted-Average Interest Rate as of December 31,
(Millions of Dollars)	2022		2021		2022		2021		2022		2021
Eversource Parent Commercial Paper Program	$	1,442.2	$	1,343.0	$	557.8	$	657.0	4.63	%	0.31	%
NSTAR Electric Commercial Paper Program	—		162.5		650.0		487.5		—	%	0.14	%

There were no borrowings outstanding on the revolving credit facilities as of December 31, 2022 or 2021.

CL&P and PSNH have uncommitted line of credit agreements totaling $450 million and $300 million, respectively, which will expire on May 12, 2023. There are no borrowings outstanding on either the CL&P or PSNH uncommitted line of credit agreements as of December 31, 2022.

Amounts outstanding under the commercial paper programs are included in Notes Payable and classified in current liabilities on the Eversource and NSTAR Electric balance sheets, as all borrowings are outstanding for no more than 364 days at one time.

Under the credit facilities described above, Eversource and its subsidiaries, including CL&P, NSTAR Electric, PSNH, NSTAR Gas, EGMA, Yankee Gas, and Aquarion Water Company of Connecticut, must comply with certain financial and non-financial covenants, including a consolidated debt to total capitalization ratio.  As of December 31, 2022 and 2021, Eversource and its subsidiaries were in compliance with these covenants. If Eversource or its subsidiaries were not in compliance with these covenants, an event of default would occur requiring all outstanding borrowings by such borrower to be repaid, and additional borrowings by such borrower would not be permitted under its respective credit facility.

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 December 31, 2022, there were intercompany loans from Eversource parent to PSNH of $173.3 million. As of December 31, 2021, there were intercompany loans from Eversource parent to PSNH of $110.6 million. Intercompany loans from Eversource parent are included in Notes Payable to Eversource Parent and classified in current liabilities on the respective subsidiary's balance sheets.

Sources and Uses of Cash: The Company expects the future operating cash flows of Eversource, CL&P, NSTAR Electric and PSNH, along with existing borrowing availability and access to both debt and equity markets, will be sufficient to meet any working capital and future operating requirements, and capital investment forecasted opportunities.

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LONG-TERM DEBT

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

LONG-TERM DEBT

LONG-TERM DEBT

Details of long-term debt outstanding are as follows:

CL&P (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
First Mortgage Bonds:
1994 Series D due 2024	7.875	%	$	139.8	$	139.8
2004 Series B due 2034	5.750	%	130.0		130.0
2005 Series B due 2035	5.625	%	100.0		100.0
2006 Series A due 2036	6.350	%	250.0		250.0
2007 Series B due 2037	5.750	%	150.0		150.0
2007 Series D due 2037	6.375	%	100.0		100.0
2013 Series A due 2023	2.500	%	400.0		400.0
2014 Series A due 2044	4.300	%	475.0		475.0
2015 Series A due 2045	4.150	%	350.0		350.0
2017 Series A due 2027	3.200	%	500.0		500.0
2018 Series A due 2048	4.000	%	800.0		800.0
2020 Series A due 2025	0.750	%	400.0		400.0
2021 Series A due 2031	2.050	%	425.0		425.0
Total First Mortgage Bonds			4,219.8		4,219.8
Less Amounts due Within One Year			(400.0)		—
Current Portion Classified as Long-Term Debt (1)			400.0		—
Unamortized Premiums and Discounts, Net			21.5		23.1
Unamortized Debt Issuance Costs			(24.8)		(27.5)
CL&P Long-Term Debt			$	4,216.5	$	4,215.4

NSTAR Electric (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
Debentures:
2006 Debentures due 2036	5.750	%	$	200.0	$	200.0
2010 Debentures due 2040	5.500	%	300.0		300.0
2012 Debentures due 2022	2.375	%	—		400.0
2014 Debentures due 2044	4.400	%	300.0		300.0
2015 Debentures due 2025	3.250	%	250.0		250.0
2016 Debentures due 2026	2.700	%	250.0		250.0
2017 Debentures due 2027	3.200	%	700.0		700.0
2019 Debentures due 2029	3.250	%	400.0		400.0
2020 Debentures due 2030	3.950	%	400.0		400.0
2021 Debentures due 2051	3.100	%	300.0		300.0
2021 Debentures due 2031	1.950	%	300.0		300.0
2022 Debentures due 2052	4.550	%	450.0		—
2022 Debentures due 2052	4.950	%	400.0		—
Total Debentures			4,250.0		3,800.0
Notes:
2004 Senior Notes Series B due 2034	5.900	%	50.0		50.0
2007 Senior Notes Series D due 2037	6.700	%	40.0		40.0
2013 Senior Notes Series G due 2023	3.880	%	80.0		80.0
2016 Senior Notes Series H due 2026	2.750	%	50.0		50.0
Total Notes			220.0		220.0
Less Amounts due Within One Year			(80.0)		(400.0)
Unamortized Premiums and Discounts, Net			(14.8)		(11.2)
Unamortized Debt Issuance Costs			(30.1)		(23.4)
NSTAR Electric Long-Term Debt			$	4,345.1	$	3,585.4

PSNH (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
First Mortgage Bonds:
2005 Series M due 2035	5.600	%	$	50.0	$	50.0
2013 Series S due 2023	3.500	%	325.0		325.0
2019 Series T due 2049	3.600	%	300.0		300.0
2020 Series U due 2050	2.400	%	150.0		150.0
2021 Series V due 2031	2.200	%	350.0		350.0
Total First Mortgage Bonds			1,175.0		1,175.0
Less Amounts due Within One Year			(325.0)		—
Current Portion Classified as Long-Term Debt (1)			295.3		—
Unamortized Premiums and Discounts, Net			(2.5)		(2.6)
Unamortized Debt Issuance Costs			(7.9)		(8.6)
PSNH Long-Term Debt			$	1,134.9	$	1,163.8

OTHER (Millions of Dollars)					As of December 31,
	Interest Rate				2022		2021
Yankee Gas - First Mortgage Bonds due 2024 - 2051	1.380	%	-	5.350%	$	845.0	$	765.0
NSTAR Gas - First Mortgage Bonds due 2025 - 2051	2.250	%	-	7.110%	705.0		580.0
EGMA - First Mortgage Bonds due 2031 - 2052	2.110	%	-	4.700%	650.0		550.0
Aquarion - Senior Notes due 2024	4.000%				360.0		360.0
Aquarion - Unsecured Notes due 2023 - 2052	—	%	-	6.430%	464.7		394.9
Aquarion - Secured Debt due 2023 - 2044	2.864	%	-	9.290%	34.4		39.6
Eversource Parent - Senior Notes due 2023 - 2050	0.800	%	-	4.600%	8,150.0		6,100.0
Pre-1983 Spent Nuclear Fuel Obligation (CYAPC)					11.9		11.7
Fair Value Adjustment (2)					26.2		43.8
Less Fair Value Adjustment - Current Portion (2)					(7.0)		(17.7)
Less Amounts due in One Year					(1,203.4)		(775.4)
Unamortized Premiums and Discounts, Net					40.1		43.4
Unamortized Debt Issuance Costs					(49.4)		(36.3)
Total Other Long-Term Debt					$	10,027.5	$	8,059.0
Total Eversource Long-Term Debt					$	19,724.0	$	17,023.6

(1)     As a result of the CL&P and PSNH long-term debt issuances in January 2023, $400 million and $295.3 million, respectively, of current portion of long-term debt were reclassified as Long-Term Debt on CL&P’s and PSNH’s balance sheets as of December 31, 2022.

(2)     The fair value adjustment amount is the purchase price adjustments, net of amortization, required to record long-term debt at fair value on the dates of the 2012 merger with NSTAR and the 2017 acquisition of Aquarion.

Availability under Long-Term Debt Issuance Authorizations: On December 14, 2022, the NHPUC approved PSNH’s request for authorization to issue up to $600 million in long-term debt through December 31, 2023. On November 30, 2022, the PURA approved CL&P's request for authorization to issue up to $1.15 billion in long-term debt through December 31, 2024. On June 14, 2022, the DPU approved NSTAR Gas’ request for authorization to issue up to $325 million in long-term debt through December 31, 2024. The remaining Eversource operating companies, including NSTAR Electric, have utilized the long-term debt authorizations in place with the respective regulatory commissions.

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/ Repayment Information
CL&P 2023 Series A First Mortgage Bonds	5.25	%	$	500.0	January 2023	January 2053	Repaid 2013 Series A Bonds at maturity and short-term debt, and paid capital expenditures and working capital
CL&P 2013 Series A First Mortgage Bonds	2.50	%	(400.0)		January 2023	January 2023	Paid at maturity
NSTAR Electric 2022 Debentures	4.55	%	450.0		May 2022	June 2052	Repaid short-term debt, paid capital expenditures and working capital
NSTAR Electric 2022 Debentures	4.95	%	400.0		September 2022	September 2052	Refinanced investments in eligible green expenditures, which were previously financed using short-term debt from October 1, 2020 through June 30, 2022
NSTAR Electric 2012 Debentures	2.375	%	(400.0)		October 2022	October 2022	Paid at maturity
PSNH Series W First Mortgage Bonds	5.15	%	300.0		January 2023	January 2053	Repaid short-term debt, paid capital expenditures and working capital
Eversource Parent Series V Senior Notes	2.90	%	650.0		February 2022	March 2027	Repaid Series K Senior Notes at maturity and short-term debt
Eversource Parent Series W Senior Notes	3.375	%	650.0		February 2022	March 2032	Repaid Series K Senior Notes at maturity and short-term debt
Eversource Parent Series X Senior Notes	4.20	%	900.0		June 2022	June 2024	Repaid short-term debt and paid working capital
Eversource Parent Series Y Senior Notes	4.60	%	600.0		June 2022	July 2027	Repaid short-term debt and paid working capital
Eversource Parent Series K Senior Notes	2.75	%	(750.0)		March 2022	March 2022	Paid at maturity
Yankee Gas Series B First Mortgage Bonds	8.48	%	(20.0)		March 2022	March 2022	Paid at maturity
Yankee Gas Series U First Mortgage Bonds	4.31	%	100.0		September 2022	September 2032	Repaid short-term debt, paid capital expenditures and for general corporate purposes
EGMA Series C First Mortgage Bonds	4.70	%	100.0		June 2022	June 2052	Repaid short-term debt, paid capital expenditures and for general corporate purposes
NSTAR Gas Series V First Mortgage Bonds	4.40	%	125.0		July 2022	August 2032	Repaid short-term debt, paid capital expenditures and for general corporate purposes
Aquarion Water Company of New Hampshire General Mortgage Bonds	4.45	%	(5.0)		July 2022	July 2022	Paid at maturity
Aquarion Water Company of Connecticut Senior Notes	4.69	%	70.0		August 2022	September 2052	Repaid short-term debt

Long-Term Debt Provisions:  The utility plant of CL&P, PSNH, Yankee Gas, NSTAR Gas, EGMA and a portion of Aquarion is subject to the lien of each company's respective first mortgage bond indenture.  The Eversource parent, NSTAR Electric and a portion of Aquarion debt is unsecured. Additionally, the long-term debt agreements provide that Eversource and certain of its subsidiaries must comply with certain covenants as are customarily included in such agreements, including equity requirements for NSTAR Electric, NSTAR Gas and Aquarion.  Under the equity requirements, NSTAR Electric's and Aquarion's senior notes must maintain a certain consolidated indebtedness to capitalization ratio as of the end of any fiscal quarter and NSTAR Gas' outstanding long-term debt must not exceed equity.

Certain secured and unsecured long-term debt securities are callable at redemption price or are subject to make-whole provisions.

No long-term debt defaults have occurred as of December 31, 2022.

CYAPC's Pre-1983 Spent Nuclear Fuel Obligation:  Under the Nuclear Waste Policy Act of 1982, the DOE is responsible for the selection and development of repositories for, and the disposal of, spent nuclear fuel and high-level radioactive waste. CYAPC is obligated to pay the DOE for the costs to dispose of spent nuclear fuel and high-level radioactive waste generated prior to April 7, 1983 (pre-1983 Spent Nuclear Fuel). CYAPC has partially paid this obligation and recorded an accrual for its remaining liability to the DOE. This liability accrues interest costs at the 3-month Treasury bill yield rate. For nuclear fuel used to generate electricity prior to April 7, 1983, payment may be made any time prior to the first delivery of spent fuel to the DOE. As of December 31, 2022 and 2021, as a result of consolidating CYAPC, Eversource has consolidated $11.9 million and $11.7 million, respectively, in pre-1983 spent nuclear fuel obligations to the DOE. The obligation includes accumulated interest costs of $8.8 million and $8.7 million as of December 31, 2022 and 2021, respectively.  CYAPC maintains a trust to fund amounts due to the DOE for the disposal of pre-1983 spent nuclear fuel.  For further information, see Note 5, "Marketable Securities," to the financial statements. Fees for disposal of nuclear fuel burned on or after April 7, 1983 were billed to member companies and paid to the DOE.

Long-Term Debt Maturities:  Long-term debt maturities on debt outstanding for the years 2023 through 2027 and thereafter are shown below. These amounts exclude PSNH rate reduction bonds, CYAPC pre-1983 spent nuclear fuel obligation, net unamortized premiums, discounts and debt issuance costs, and other fair value adjustments as of December 31, 2022:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2023	$	2,008.4	$	400.0	$	80.0	$	325.0
2024	1,950.0		139.8		—		—
2025	1,400.2		400.0		250.0		—
2026	940.2		—		300.0		—
2027	2,539.2		500.0		700.0		—
Thereafter	12,236.0		2,780.0		3,140.0		850.0
Total	$	21,074.0	$	4,219.8	$	4,470.0	$	1,175.0

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RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES

12 Months Ended

Dec. 31, 2022

Rate Reduction Bonds and Variable Interest Entity [Abstract]

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES

Rate Reduction Bonds: In May 2018, PSNH Funding, a wholly-owned subsidiary of PSNH, issued $635.7 million of securitized RRBs in multiple tranches with a weighted average interest rate of 3.66 percent, and final maturity dates ranging from 2026 to 2035.  The RRBs are expected to be repaid by February 1, 2033. RRB payments consist of principal and interest and are paid semi-annually, beginning on February 1, 2019. The RRBs were issued pursuant to a finance order issued by the NHPUC in January 2018 to recover remaining costs resulting from the divestiture of PSNH’s generation assets.

The proceeds were used by PSNH Funding to purchase PSNH’s stranded cost asset-recovery property, including its vested property right to bill, collect and adjust a non-bypassable stranded cost recovery charge from PSNH’s retail customers. The collections are used to pay principal, interest and other costs in connection with the RRBs. The RRBs are secured by the stranded cost asset-recovery property. Cash collections from the stranded cost recovery charges and funds on deposit in trust accounts are the sole source of funds to satisfy the debt obligation. PSNH is not the owner of the RRBs, and PSNH Funding’s assets and revenues are not available to pay PSNH’s creditors. The RRBs are non-recourse senior secured obligations of PSNH Funding and are not insured or guaranteed by PSNH or Eversource Energy.

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)	As of December 31,
PSNH Balance Sheets:	2022		2021
Restricted Cash - Current Portion (included in Current Assets)	$	32.4	$	31.1
Restricted Cash - Long-Term Portion (included in Other Long-Term Assets)	3.2		3.2
Securitized Stranded Cost (included in Regulatory Assets)	435.7		478.9
Other Regulatory Liabilities (included in Regulatory Liabilities)	6.0		5.4
Accrued Interest (included in Other Current Liabilities)	6.9		7.5
Rate Reduction Bonds - Current Portion	43.2		43.2
Rate Reduction Bonds - Long-Term Portion	410.5		453.7

(Millions of Dollars) PSNH Income Statements:	For the Years Ended December 31,
	2022		2021		2020
Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net)	$	43.2	$	43.2	$	43.2
Interest Expense on RRB Principal (included in Interest Expense)	17.0		18.4		19.7

Estimated principal payments on RRBs as of December 31, 2022, is summarized annually through 2027 and thereafter as follows:

(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
PSNH	$	43.2	$	43.2	$	43.2	$	43.2	$	43.2	$	237.7	$	453.7

Variable Interest Entities - Other: The Company's variable interests outside of the consolidated group include contracts that are required by regulation and provide for regulatory recovery of contract costs and benefits through customer rates.  Eversource, CL&P and NSTAR Electric hold variable interests in VIEs through agreements with certain entities that own single renewable energy or peaking generation power plants, with other independent power producers and with transmission businesses.  Eversource, CL&P and NSTAR Electric do not control the activities that are economically significant to these VIEs or provide financial or other support to these VIEs.  Therefore, Eversource, CL&P and NSTAR Electric do not consolidate these VIEs.

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EMPLOYEE BENEFITS

12 Months Ended

Dec. 31, 2022

Postemployment Benefits [Abstract]

EMPLOYEE BENEFITS

EMPLOYEE BENEFITS

A.     Pension Benefits and Postretirement Benefits Other Than Pension

Eversource provides defined benefit retirement plans (Pension Plans) that cover eligible employees and are subject to the provisions of ERISA, as amended by the Pension Protection Act of 2006. Eversource's policy is to annually fund the Pension Plans in an amount at least equal to an amount that will satisfy all federal funding requirements. 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 benefits provided under the PBOP Plans are not vested, and the Company has the right to modify any benefit provision subject to applicable laws at that time. Eversource annually funds postretirement costs through tax deductible contributions to external trusts.

Funded Status:  The Pension, SERP and PBOP Plans are accounted for under the multiple-employer approach, with each operating company's balance sheet reflecting its share of the funded status of the plans.  Although Eversource maintains marketable securities in a benefit trust, the SERP Plans do not contain any assets.  For further information, see Note 5, "Marketable Securities," to the financial statements.  The following tables provide information on the plan benefit obligations, fair values of plan assets, and funded status:  

	Pension and SERP
	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Change in Benefit Obligation:
Benefit Obligation as of Beginning of Year	$	(6,729.7)	$	(1,330.9)	$	(1,448.4)	$	(721.0)	$	(7,045.3)	$	(1,477.3)	$	(1,517.9)	$	(748.7)
Service Cost	(70.1)		(18.7)		(13.8)		(6.9)		(85.8)		(23.0)		(15.8)		(8.9)
Interest Cost	(154.5)		(31.3)		(32.8)		(16.9)		(130.0)		(27.3)		(26.8)		(14.5)
Actuarial Gain	1,385.8		284.1		295.5		156.7		177.1		127.8		20.8		14.7
Benefits Paid - Pension	302.5		63.3		68.4		33.9		309.5		64.6		68.7		34.7
Benefits Paid - Lump Sum	33.0		—		14.8		1.0		34.7		—		15.6		—
Benefits Paid - SERP	12.9		0.3		0.2		0.4		10.1		0.3		0.2		0.4
Employee Transfers	—		3.2		5.7		(3.4)		—		4.0		6.8		1.3
Benefit Obligation as of End of Year	$	(5,220.1)	$	(1,030.0)	$	(1,110.4)	$	(556.2)	$	(6,729.7)	$	(1,330.9)	$	(1,448.4)	$	(721.0)
Change in Pension Plan Assets:
Fair Value of Pension Plan Assets as of   Beginning of Year	$	6,495.5	$	1,323.8	$	1,596.0	$	694.6	$	5,409.2	$	1,043.1	$	1,345.1	$	593.7
Employer Contributions	80.0		—		15.0		—		180.0		98.9		30.0		—
Actual Return on Pension Plan Assets	(433.6)		(85.3)		(103.3)		(45.1)		1,250.5		250.4		312.0		136.9
Benefits Paid - Pension	(302.5)		(63.3)		(68.4)		(33.9)		(309.5)		(64.6)		(68.7)		(34.7)
Benefits Paid - Lump Sum	(33.0)		—		(14.8)		(1.0)		(34.7)		—		(15.6)		—
Employee Transfers	—		(3.2)		(5.7)		3.4		—		(4.0)		(6.8)		(1.3)
Fair Value of Pension Plan Assets as of End of Year	$	5,806.4	$	1,172.0	$	1,418.8	$	618.0	$	6,495.5	$	1,323.8	$	1,596.0	$	694.6
Funded Status as of December 31st	$	586.3	$	142.0	$	308.4	$	61.8	$	(234.2)	$	(7.1)	$	147.6	$	(26.4)

Actuarial Gains and Losses: For the year ended December 31, 2022, actuarial gains were primarily attributable to an increase in the discount rate, which resulted in a decrease to Eversource's Pension and SERP Plans’ projected benefit obligation of $1.48 billion. For the year ended December 31, 2021, actuarial gains were primarily attributable to an increase in the discount rate, which resulted in a decrease to Eversource's Pension and SERP Plans’ projected benefit obligation of $286.8 million, which was partially offset by actuarial losses resulting from changes in the mortality assumption.

As of December 31, 2022 and 2021, the accumulated benefit obligation for the Pension and SERP Plans is as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2022	$	4,911.6	$	960.7	$	1,055.1	$	516.9
2021	6,337.3		1,241.1		1,376.1		670.3

	PBOP
	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Change in Benefit Obligation:
Benefit Obligation as of Beginning of Year	$	(884.3)	$	(165.5)	$	(238.4)	$	(92.3)	$	(993.9)	$	(178.6)	$	(260.5)	$	(109.5)
Service Cost	(11.6)		(2.0)		(2.0)		(1.1)		(13.5)		(2.3)		(2.4)		(1.2)
Interest Cost	(20.2)		(3.7)		(5.3)		(2.2)		(17.4)		(3.2)		(4.4)		(1.8)
Actuarial Gain	173.6		33.0		39.4		15.2		81.4		5.8		11.5		14.6
Benefits Paid	52.1		10.4		16.6		6.0		51.7		10.9		16.3		5.6
Employee Transfers	—		(0.1)		0.2		(0.2)		—		1.9		1.1		—
Impact of Acquisitions	(3.3)		—		—		—		7.4		—		—		—
Benefit Obligation as of End of Year	$	(693.7)	$	(127.9)	$	(189.5)	$	(74.6)	$	(884.3)	$	(165.5)	$	(238.4)	$	(92.3)
Change in Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	$	1,138.3	$	145.7	$	530.0	$	88.0	$	1,004.1	$	134.1	$	464.6	$	79.4
Actual Return on Plan Assets	(119.6)		(15.0)		(57.0)		(9.8)		183.2		24.1		84.2		14.2
Employer Contributions	3.1		—		—		—		2.3		—		—		—
Benefits Paid	(51.7)		(10.4)		(16.6)		(6.0)		(51.3)		(10.9)		(16.3)		(5.6)
Employee Transfers	—		0.3		(0.3)		0.1		—		(1.6)		(2.5)		—
Fair Value of Plan Assets as of End of Year	$	970.1	$	120.6	$	456.1	$	72.3	$	1,138.3	$	145.7	$	530.0	$	88.0
Funded Status as of December 31st	$	276.4	$	(7.3)	$	266.6	$	(2.3)	$	254.0	$	(19.8)	$	291.6	$	(4.3)

Actuarial Gains and Losses: For the year ended December 31, 2022, actuarial gains were primarily attributable to an increase in the discount rate, which resulted in a decrease to the Eversource PBOP projected benefit obligation of $180.1 million. For the year ended December 31, 2021, actuarial gains were primarily attributable to an increase in the discount rate, which resulted in a decrease to the Eversource PBOP liability of $29.8 million, and by changes in our retirement assumptions.

A reconciliation of the prepaid assets and liabilities within the Eversource Pension, SERP and PBOP Plans’ funded status to the balance sheets is as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Prepaid Pension	$	756.7	$	147.9	$	310.2	$	66.4	$	—	$	0.4	$	149.8	$	—
Prepaid PBOP	288.8		—		266.6		—		272.0		—		291.6		—
Prepaid Pension and PBOP	$	1,045.5	$	147.9	$	576.8	$	66.4	$	272.0	$	0.4	$	441.4	$	—
Accrued Pension	$	3.7	$	—	$	—	$	—	$	58.1	$	—	$	—	$	20.6
Accrued SERP	166.7		5.9		1.8		4.6		176.1		7.5		2.2		5.8
Accrued PBOP	12.4		7.3		—		2.3		18.0		19.8		—		4.3
Less: Accrued SERP - current portion	(47.3)		(0.3)		(0.2)		(0.4)		(9.7)		(0.5)		(0.2)		(0.5)
Accrued Pension, SERP and PBOP	$	135.5	$	12.9	$	1.6	$	6.5	$	242.5	$	26.8	$	2.0	$	30.2

The following actuarial assumptions were used in calculating the Pension, SERP and PBOP Plans' year end funded status:

	Pension and SERP							PBOP
	As of December 31,							As of December 31,
		2022			2021			2022	2021
Discount Rate		5.1%	—	5.2%	2.8%	—	3.0%	5.2%	2.91%	—	2.92%
Compensation/Progression Rate		3.5%	—	4.0%	3.5%	—	4.0%	N/A

For the Eversource Service PBOP Plan, the health care cost trend rate is not applicable. For the Aquarion PBOP Plan, the health care cost trend rate for pre-65 retirees is 7 percent, with an ultimate rate of 5 percent in 2031, and for post-65 retirees, the health care trend rate and ultimate rate is 3.5 percent.

Expense:  Eversource charges net periodic benefit plan expense/(income) for the Pension, SERP and PBOP Plans to its subsidiaries based on the actual participant demographic data for each subsidiary's participants.  The actual investment return in the trust is allocated to each of the subsidiaries annually in proportion to the investment return expected to be earned during the year. The Company utilizes the spot rate methodology to estimate the discount rate for the service and interest cost components of benefit expense, which provides a relatively precise measurement by matching projected cash flows to the corresponding spot rates on the yield curve.

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 Year Ended December 31, 2022								For the Year Ended December 31, 2022
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	70.1	$	18.7	$	13.8	$	6.9	$	11.6	$	2.0	$	2.0	$	1.1
Interest Cost	154.5		31.3		32.8		16.9		20.2		3.7		5.3		2.2
Expected Return on Plan Assets	(523.6)		(106.3)		(128.4)		(56.1)		(89.9)		(11.4)		(42.4)		(6.7)
Actuarial Loss	116.0		16.2		32.8		7.9		—		—		—		—
Prior Service Cost/(Credit)	1.4		—		0.3		—		(21.7)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Income	$	(181.6)	$	(40.1)	$	(48.7)	$	(24.4)	$	(79.8)	$	(4.6)	$	(52.1)	$	(3.0)
Intercompany Income Allocations	N/A		$	(16.0)	$	(12.4)	$	(3.6)	N/A		$	(3.7)	$	(3.6)	$	(1.2)

	Pension and SERP								PBOP
	For the Year Ended December 31, 2021								For the Year Ended December 31, 2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	85.8	$	23.0	$	15.8	$	8.9	$	13.5	$	2.3	$	2.4	$	1.2
Interest Cost	130.0		27.3		26.8		14.5		17.4		3.2		4.4		1.8
Expected Return on Plan Assets	(437.5)		(86.8)		(108.1)		(47.5)		(79.1)		(10.3)		(36.9)		(6.1)
Actuarial Loss	243.9		45.5		61.6		20.7		8.9		1.8		2.4		0.7
Prior Service Cost/(Credit)	1.4		—		0.3		—		(21.2)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Expense/(Income)	$	23.6	$	9.0	$	(3.6)	$	(3.4)	$	(60.5)	$	(1.9)	$	(44.7)	$	(2.0)
Intercompany Expense/(Income) Allocations	N/A		$	8.0	$	8.8	$	2.7	N/A		$	(1.6)	$	(1.9)	$	(0.6)

	Pension and SERP								PBOP
	For the Year Ended December 31, 2020								For the Year Ended December 31, 2020
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	76.2	$	21.8	$	15.4	$	8.2	$	10.2	$	1.7	$	2.1	$	0.9
Interest Cost	177.8		37.3		38.6		19.4		24.6		4.4		6.6		2.8
Expected Return on Plan Assets	(400.3)		(79.2)		(103.0)		(44.7)		(73.6)		(9.9)		(34.0)		(5.7)
Actuarial Loss	202.0		39.2		55.2		15.6		8.4		1.1		2.5		0.8
Prior Service Cost/(Credit)	1.2		—		0.3		—		(21.2)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Expense/(Income)	$	56.9	$	19.1	$	6.5	$	(1.5)	$	(51.6)	$	(1.6)	$	(39.8)	$	(0.8)
Intercompany Expense/(Income) Allocations	N/A		$	9.1	$	8.9	$	2.9	N/A		$	(1.1)	$	(1.4)	$	(0.5)

The following actuarial assumptions were used to calculate Pension, SERP and PBOP expense amounts:

	Pension and SERP									PBOP
	For the Years Ended December 31,									For the Years Ended December 31,
	2022			2021			2020			2022			2021			2020
Discount Rate	2.2%	—	3.2%	1.5%	—	3.0%	2.6%	—	3.5%	2.3%	—	3.3%	1.8%	—	3.1%	2.7%	—	3.6%
Expected Long-Term Rate of Return	8.25%			8.25%			8.25%			8.25%			8.25%			8.25%
Compensation/Progression Rate	3.5%	—	4.0%	3.5%	—	4.0%	3.5%	—	4.0%	N/A			N/A			N/A

For the Aquarion Pension and PBOP Plans, the expected long-term rate of return was 7 percent for the years ended December 31, 2022 and 2021. For the Aquarion PBOP Plan, the health care cost trend rate was a range of 3.5 percent to 6.5 percent for the year ended December 31, 2022 and 3.5 percent to 6.2 percent for the year ended December 31, 2021.

Regulatory Assets and Accumulated Other Comprehensive Income/(Loss) Amounts: The Pension, SERP and PBOP Plans cover eligible employees, including, among others, employees of the regulated companies. The regulated companies record actuarial losses and gains and prior service costs and credits arising at the December 31st remeasurement date of the funded status of the benefit plans as a regulatory asset or regulatory liability in lieu of a charge to Accumulated Other Comprehensive Income/(Loss), reflecting ultimate recovery from customers through rates.  Regulatory accounting is also applied to the portions of the Eversource Service retiree benefit costs that support the regulated companies, as these costs are also recovered from customers.  Adjustments to the Pension, SERP and PBOP Plans' funded status for the unregulated companies are recorded on an after-tax basis to Accumulated Other Comprehensive Income/(Loss).  For further information, see Note 2, "Regulatory Accounting," and Note 16, "Accumulated Other Comprehensive Income/(Loss)," to the financial statements.  

The following is a summary of the changes in plan assets and benefit obligations recognized in Regulatory Assets and Other Comprehensive Income (OCI) as well as amounts in Regulatory Assets and OCI that were reclassified as net periodic benefit expense during the years presented:

	Pension and SERP								PBOP
	Regulatory Assets				OCI				Regulatory Assets				OCI
	For the Years Ended December 31,								For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2022		2021		2022		2021		2022		2021
Actuarial (Gains)/Losses Arising During the Year	$	(431.6)	$	(961.7)	$	4.6	$	(28.4)	$	36.8	$	(181.5)	$	(0.8)	$	(4.0)
Actuarial Losses Reclassified as Net Periodic Benefit Expense	(107.0)		(231.2)		(9.0)		(12.7)		—		(8.5)		—		(0.4)
Prior Service (Cost)/Credit Reclassified as Net Periodic   Benefit (Expense)/Income	(1.2)		(1.3)		(0.2)		(0.1)		21.8		21.1		(0.1)		0.1

The following is a summary of the remaining Regulatory Assets and Accumulated Other Comprehensive Income amounts that have not been recognized as components of net periodic benefit expense as of December 31, 2022 and 2021:

	Regulatory Assets as of December 31,				AOCI as of December 31,
(Millions of Dollars)	2022		2021		2022		2021
Pension and SERP
Actuarial Loss	$	888.7	$	1,427.3	$	61.9	$	66.3
Prior Service Cost	4.1		5.3		0.4		0.6
PBOP
Actuarial Loss	$	81.8	$	45.0	$	2.7	$	3.5
Prior Service (Credit)/Cost	(108.3)		(130.1)		0.9		1.0

The difference between the actual return and calculated expected return on plan assets for the Pension and PBOP Plans, as well as changes in actuarial assumptions impacting the projected benefit obligation, are recorded as unamortized actuarial gains or losses arising during the year in Regulatory Assets or Accumulated Other Comprehensive Income/(Loss). Unamortized actuarial gains or losses are amortized as a component of pension and PBOP expense over the estimated average future employee service period using the corridor approach.

Estimated Future Benefit Payments:  The following benefit payments, which reflect expected future service, are expected to be paid by the Pension, SERP and PBOP Plans:

(Millions of Dollars)	2023		2024		2025		2026		2027		2028 - 2032
Pension and SERP	$	401.4	$	374.4	$	380.1	$	383.0	$	384.1	$	1,901.7
PBOP	57.9		57.3		56.6		55.5		54.4		253.7

Eversource Contributions:   Based on the current status of the Pension Plans and federal pension funding requirements, there is no minimum funding requirement for our Eversource Service Pension Plan in 2023 and we do not expect to make pension contributions in 2023. We do not expect to make any contributions to the Eversource Service PBOP Plan in 2023. Eversource currently estimates contributing $5.0 million and $2.9 million to the Aquarion Pension and PBOP Plans, respectively, in 2023.

Fair Value of Pension and PBOP Plan Assets:  Pension and PBOP funds are held in external trusts.  Trust assets, including accumulated earnings, must be used exclusively for Pension and PBOP payments.  Eversource's investment strategy for its Pension and PBOP Plans is to maximize the long-term rates of return on these plans' assets within an acceptable level of risk.  The investment strategy for each asset category includes a diversification of asset types, fund strategies and fund managers and it establishes target asset allocations that are routinely reviewed and periodically rebalanced.  PBOP assets are comprised of assets held in the PBOP Plan trust, as well as specific assets within the Pension Plan trust (401(h) assets).  The investment policy and strategy of the 401(h) assets is consistent with that of the defined benefit pension plan. Eversource's expected long-term rates of return on Pension and PBOP Plan assets are based on target asset allocation assumptions and related expected long-term rates of return.  In developing its expected long-term rate of return assumptions for the Pension and PBOP Plans, Eversource evaluated input from consultants, as well as long-term inflation assumptions and historical returns. Management has assumed long-term rates of return of 8.25 percent for the Eversource Service Pension and PBOP Plan assets and a 7 percent long-term rate of return for the Aquarion Plans to estimate its 2023 Pension and PBOP costs.

These long-term rates of return are based on the assumed rates of return for the target asset allocations as follows:

	As of December 31,
	2022				2021
	Eversource Pension Plan and PBOP Plan				Eversource Pension Plan and PBOP Plan
	Target Asset Allocation		Assumed Rate of Return		Target Asset Allocation		Assumed Rate of Return
Equity Securities:
United States	15.0	%	8.5	%	15.0	%	8.5	%
Global	10.0	%	8.75	%	10.0	%	8.75	%
Non-United States	8.0	%	8.5	%	8.0	%	8.5	%
Emerging Markets	4.0	%	10.0	%	4.0	%	10.0	%
Debt Securities:
Fixed Income	13.0	%	4.0	%	13.0	%	4.0	%
Public High Yield Fixed Income	4.0	%	6.5	%	4.0	%	6.5	%
Private Debt	13.0	%	9.0	%	13.0	%	9.0	%
Private Equity	18.0	%	12.0	%	18.0	%	12.0	%
Real Assets	15.0	%	7.5	%	15.0	%	7.5	%

The following table presents, by asset category, the Pension and PBOP Plan assets recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy:  

	Pension Plan
	Fair Value Measurements as of December 31,
(Millions of Dollars)	2022								2021
Asset Category:	Level 1		Level 2		Uncategorized		Total		Level 1		Level 2		Uncategorized		Total
Equity Securities	$	407.7	$	—	$	1,102.2	$	1,509.9	$	722.5	$	—	$	1,385.2	$	2,107.7
Fixed Income (1)	277.1		78.5		1,598.8		1,954.4		139.6		233.8		1,689.1		2,062.5
Private Equity	—		—		1,684.9		1,684.9		—		—		1,702.7		1,702.7
Real Assets	181.8		—		731.0		912.8		218.3		—		702.8		921.1
Total	$	866.6	$	78.5	$	5,116.9	$	6,062.0	$	1,080.4	$	233.8	$	5,479.8	$	6,794.0
Less:  401(h) PBOP Assets (2)							(255.6)								(298.5)
Total Pension Assets							$	5,806.4							$	6,495.5

	PBOP Plan
	Fair Value Measurements as of December 31,
(Millions of Dollars)	2022								2021
Asset Category:	Level 1		Level 2		Uncategorized		Total		Level 1		Level 2		Uncategorized		Total
Equity Securities	$	153.2	$	—	$	183.5	$	336.7	$	191.4	$	—	$	248.3	$	439.7
Fixed Income	18.2		40.2		141.1		199.5		49.7		45.2		125.5		220.4
Private Equity	—		—		70.9		70.9		—		—		58.7		58.7
Real Assets	71.2		—		36.2		107.4		90.0		—		31.0		121.0
Total	$	242.6	$	40.2	$	431.7	$	714.5	$	331.1	$	45.2	$	463.5	$	839.8
Add:  401(h) PBOP Assets (2)							255.6								298.5
Total PBOP Assets							$	970.1							$	1,138.3

(1)     Fixed Income investments classified as Level 1 as of December 31, 2022 include pending redemption settlements of $138 million.

(2)     The assets of the Pension Plan include a 401(h) account that has been allocated to provide health and welfare postretirement benefits under the PBOP Plan.

The Company values assets based on observable inputs when available.  Equity securities, exchange traded funds and futures contracts classified as Level 1 in the fair value hierarchy are priced based on the closing price on the primary exchange as of the balance sheet date.

Fixed income securities, such as government issued securities and corporate bonds, are included in Level 2 and are valued using pricing models, quoted prices of securities with similar characteristics or discounted cash flows.  The pricing models utilize observable inputs such as recent trades for the same or similar instruments, yield curves, discount margins and bond structures. Swaps are valued using pricing models that incorporate interest rates and equity and fixed income index closing prices to determine a net present value of the cash flows.  

Certain investments, such as commingled funds, private equity investments, fixed income funds, real asset funds and hedge funds are valued using the net asset value (NAV) as a practical expedient. Assets valued at NAV are uncategorized in the fair value hierarchy. These investments are structured as investment companies offering shares or units to multiple investors for the purpose of providing a return. Commingled funds are recorded at NAV provided by the asset manager, which is based on the market prices of the underlying equity securities.  Private Equity investments, Fixed Income partnership funds and Real Assets are valued using the NAV provided by the partnerships, which are based on discounted cash flows of the underlying investments, real estate appraisals or public market comparables of the underlying investments, or the NAV of underlying assets held in hedge funds. Equity Securities investments in United States, Global, Non-United States and Emerging Markets that are uncategorized include investments in commingled funds and hedge funds that are overlaid with equity index swaps and futures contracts. Fixed Income investments that are uncategorized include investments in commingled funds, fixed income funds that invest in a variety of opportunistic credit and private debt strategies, and hedge funds that are overlaid with fixed income futures.  Defined Contribution Plans

Eversource maintains defined contribution plans on behalf of eligible participants.  The Eversource 401k Plan provides for employee and employer contributions up to statutory limits.  For eligible employees, the Eversource 401k Plan provides employer matching contributions of either 100 percent up to a maximum of three percent of eligible compensation or 50 percent up to a maximum of eight percent of eligible compensation. The Eversource 401k Plan also contains a K-Vantage feature for the benefit of eligible participants, which provides an additional annual employer contribution based on age and years of service.  K-Vantage participants are not eligible to actively participate in the Eversource Pension Plan.

The total Eversource 401k Plan employer matching contributions, including the K-Vantage contributions, were as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2022	$	59.9	$	7.7	$	12.8	$	4.8
2021	55.5		7.0		12.2		4.3
2020	49.4		6.6		11.8		4.1

Share-Based Payments

Share-based compensation awards are recorded using a fair-value based method at the date of grant.  Eversource, CL&P, NSTAR Electric and PSNH record compensation expense related to these awards, as applicable, for shares issued to their respective employees and officers, as well as for the allocation of costs associated with shares issued to Eversource's service company employees and officers that support CL&P, NSTAR Electric and PSNH.  

Eversource Incentive Plans:  Eversource maintains long-term equity-based incentive plans in which Eversource, CL&P, NSTAR Electric and PSNH employees, officers and board members are eligible to participate.  The incentive plans authorize Eversource to grant up to 3,200,000 new shares for various types of awards, including RSUs and performance shares, to eligible employees, officers, and board members. As of December 31, 2022 and 2021, Eversource had 903,183 and 2,430,716 common shares, respectively, available for issuance under these plans.

Eversource accounts for its various share-based plans as follows:

•RSUs - Eversource records compensation expense, net of estimated forfeitures, on a straight-line basis over the requisite service period based upon the fair value of Eversource's common shares at the date of grant.  The par value of RSUs is reclassified to Common Stock from Capital Surplus, Paid In as RSUs become issued as common shares.

•Performance Shares - Eversource records compensation expense, net of estimated forfeitures, over the requisite service period. Performance shares vest based upon the extent to which Company goals are achieved.  Vesting of outstanding performance shares is based upon the Company's EPS growth over the requisite service period and level of payout is determined based on the total shareholder return as compared to the Edison Electric Institute (EEI) Index during the requisite service period.  The fair value of performance shares is determined at the date of grant using a lattice model. Compensation expense is subject to volatility until payout is established.

RSUs:  Eversource granted RSUs under the annual long-term incentive programs that are subject to three-year graded vesting schedules for employees, and one-year graded vesting schedules, or immediate vesting, for board members.  RSUs are paid in shares, reduced by amounts sufficient to satisfy withholdings for income taxes, subsequent to vesting.  A summary of RSU transactions is as follows:

	RSUs (Units)	Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2021	594,623	$	65.70
Granted	218,005	$	85.96
Shares Issued	(174,633)	$	79.89
Forfeited	(8,261)	$	85.87
Outstanding as of December 31, 2022	629,734	$	68.52

The weighted average grant-date fair value of RSUs granted for the years ended December 31, 2022, 2021 and 2020 was $85.96, $81.89 and $88.23, respectively.  As of December 31, 2022 and 2021, the number and weighted average grant-date fair value of unvested RSUs was 300,592 and $87.21 per share, and 297,270 and $83.39 per share, respectively.  During 2022, there were 184,540 RSUs at a weighted average grant-date fair value of $81.07 per share that vested during the year and were either paid or deferred.  As of December 31, 2022, 329,142 RSUs were fully vested and deferred and an additional 285,562 are expected to vest.  

Performance Shares:  Eversource granted performance shares under the annual long-term incentive programs that vest based upon the extent to which Company goals are achieved at the end of three-year performance measurement periods.  Performance shares are paid in shares, after the performance measurement period.  A summary of performance share transactions is as follows:

	Performance Shares (Units)	Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2021	464,507	$	80.54
Granted	337,406	$	83.34
Shares Issued	(248,981)	$	68.96
Forfeited	(5,642)	$	85.28
Outstanding as of December 31, 2022	547,290	$	87.49

The weighted average grant-date fair value of performance shares granted for the years ended December 31, 2022, 2021 and 2020 was $83.34, $76.08 and $75.36, respectively.  As of December 31, 2022 and 2021, the number and weighted average grant-date fair value of unvested performance shares was 457,069 and $88.43 per share, and 436,957 and $81.41 per share, respectively.  During 2022, there were 311,553 performance shares at a weighted average grant-date fair value of $73.15 per share that vested during the year and were either paid or deferred.  As of December 31, 2022, 90,221 performance shares were fully vested and deferred.

Compensation Expense: The total compensation expense and associated future income tax benefits recognized by Eversource, CL&P, NSTAR Electric and PSNH for share-based compensation awards were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Compensation Expense	$	33.4	$	28.2	$	33.9
Future Income Tax Benefit	8.7		7.3		8.9

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Compensation Expense	$	10.0	$	10.7	$	3.6	$	8.8	$	9.0	$	3.0	$	10.9	$	11.3	$	3.6
Future Income Tax Benefit	2.6		2.8		0.9		2.3		2.3		0.8		2.9		3.0		1.0

As of December 31, 2022, there was $24.5 million of total unrecognized compensation expense related to nonvested share-based awards for Eversource, including $4.0 million for CL&P, $6.9 million for NSTAR Electric, and $1.4 million for PSNH.  This cost is expected to be recognized ratably over a weighted-average period of 1.77 years for Eversource and 1.78 years for CL&P, NSTAR Electric and PSNH.

An income tax rate of 26 percent was used to estimate the tax effect on total share-based payments determined under the fair-value based method for all awards. The Company issues treasury shares to settle fully vested RSUs and performance shares under the Company's incentive plans.

For the years ended December 31, 2022, 2021 and 2020, excess tax benefits associated with the distribution of stock compensation awards reduced income tax expense by $2.1 million, $4.0 million, and $6.6 million, respectively, which increased cash flows from operating activities on the statements of cash flows.

Other Retirement Benefits

Eversource provides retirement and other benefits for certain current and past company officers.  These benefits are accounted for on an accrual basis and expensed over a period equal to the service lives of the employees.  The actuarially-determined liability for these benefits is included in Other Current and Long-Term Liabilities on the balance sheets. The related expense, which includes the allocation of expense associated with Eversource's service company officers that support CL&P, NSTAR Electric and PSNH, is included in Operations and Maintenance Expense on the income statements. The liability and expense amounts are as follows:

Eversource (Millions of Dollars)	As of and For the Years Ended December 31,
	2022		2021		2020
Actuarially-Determined Liability	$	43.4	$	42.8	$	45.7
Other Retirement Benefits Expense (1)	10.9		2.2		3.3

	As of and For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Actuarially-Determined Liability	$	0.2	$	0.1	$	1.3	$	0.2	$	0.1	$	1.5	$	0.2	$	0.1	$	1.7
Other Retirement Benefits Expense (1)	4.0		3.7		1.3		0.7		0.7		0.3		1.2		1.1		0.5

(1)    Other Retirement Benefits Expense in 2022 includes a one-time special retirement benefit payable of $9.2 million.

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INCOME TAXES

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

INCOME TAXES

INCOME TAXES

The components of income tax expense are as follows:

Eversource (Millions of Dollars)	For the Years Ended December 31,
	2022		2021		2020
Current Income Taxes:
Federal	$	95.8	$	21.5	$	73.6
State	13.6		(21.6)		19.1
Total Current	109.4		(0.1)		92.7
Deferred Income Taxes, Net:
Federal	198.8		199.7		173.5
State	148.0		147.4		83.7
Total Deferred	346.8		347.1		257.2
Investment Tax Credits, Net	(2.6)		(2.8)		(3.7)
Income Tax Expense	$	453.6	$	344.2	$	346.2

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Current Income Taxes:
Federal	$	106.2	$	55.0	$	29.6	$	15.0	$	52.3	$	43.1	$	12.0	$	53.9	$	20.6
State	20.1		8.7		5.9		(7.0)		6.2		10.8		(6.1)		6.9		3.8
Total Current	126.3		63.7		35.5		8.0		58.5		53.9		5.9		60.8		24.4
Deferred Income Taxes, Net:
Federal	17.2		35.6		5.9		76.3		16.3		(14.9)		101.1		33.8		(1.3)
State	28.2		42.4		9.9		47.6		41.2		0.4		43.4		38.8		8.6
Total Deferred	45.4		78.0		15.8		123.9		57.5		(14.5)		144.5		72.6		7.3
Investment Tax Credits, Net	(0.5)		(1.7)		—		(0.6)		(1.7)		—		(0.7)		(2.6)		—
Income Tax Expense	$	171.2	$	140.0	$	51.3	$	131.3	$	114.3	$	39.4	$	149.7	$	130.8	$	31.7

A reconciliation between income tax expense and the expected tax expense at the statutory rate is as follows:

Eversource (Millions of Dollars, except percentages)	For the Years Ended December 31,
	2022			2021			2020
Income Before Income Tax Expense	$	1,866.0		$	1,572.3		$	1,558.9
Statutory Federal Income Tax Expense at 21%	391.9			330.2			327.4
Tax Effect of Differences:
Depreciation	(17.1)			(18.1)			(11.1)
Investment Tax Credit Amortization	(2.6)			(2.8)			(3.7)
State Income Taxes, Net of Federal Impact	75.9			54.4			44.9
Dividends on ESOP	(5.1)			(5.1)			(5.1)
Tax Asset Valuation Allowance/Reserve Adjustments	51.6			44.6			33.4
Excess Stock Benefit	(2.1)			(4.0)			(6.6)
EDIT Amortization	(49.1)			(69.1)			(48.7)
Other, Net	10.2			14.1			15.7
Income Tax Expense	$	453.6		$	344.2		$	346.2
Effective Tax Rate	24.3		%	21.9		%	22.2		%

	For the Years Ended December 31,
	2022									2021									2020
(Millions of Dollars, except percentages)	CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH
Income Before Income Tax Expense	$	704.1		$	632.4		$	222.9		$	533.0		$	590.9		$	189.8		$	607.6		$	575.8		$	179.0
Statutory Federal Income Tax Expense at 21%	147.9			132.8			46.8			111.9			124.1			39.9			127.6			120.9			37.6
Tax Effect of Differences:
Depreciation	(3.7)			(4.2)			0.9			(6.4)			(3.4)			(0.2)			0.4			(3.7)			(1.4)
Investment Tax Credit Amortization	(0.5)			(1.7)			—			(0.6)			(1.7)			—			(0.7)			(2.6)			—
State Income Taxes, Net of Federal Impact	(6.6)			40.3			12.5			(4.6)			37.5			8.9			(1.2)			36.0			9.8
Tax Asset Valuation   Allowance/Reserve Adjustments	44.7			—			—			36.7			—			—			30.7			—			—
Excess Stock Benefit	(0.7)			(0.8)			(0.3)			(1.5)			(1.4)			(0.5)			(2.3)			(2.3)			(0.8)
EDIT Amortization	(9.2)			(29.2)			(7.7)			(9.8)			(43.2)			(10.5)			(9.0)			(20.4)			(15.4)
Other, Net	(0.7)			2.8			(0.9)			5.6			2.4			1.8			4.2			2.9			1.9
Income Tax Expense	$	171.2		$	140.0		$	51.3		$	131.3		$	114.3		$	39.4		$	149.7		$	130.8		$	31.7
Effective Tax Rate	24.3		%	22.1		%	23.0		%	24.6		%	19.3		%	20.8		%	24.6		%	22.7		%	17.7		%

Eversource, CL&P, NSTAR Electric and PSNH file a consolidated federal income tax return and unitary, combined and separate state income tax returns.  These entities are also parties to a tax allocation agreement under which taxable subsidiaries do not pay any more taxes than they would have otherwise paid had they filed a separate company tax return, and subsidiaries generating tax losses, if any, are paid for their losses when utilized.

Deferred tax assets and liabilities are recognized for the future tax effects of temporary differences between the carrying amounts and the tax basis of assets and liabilities.  The tax effect of temporary differences is accounted for in accordance with the rate-making treatment of the applicable regulatory commissions and relevant accounting authoritative literature.  The tax effects of temporary differences that give rise to the net accumulated deferred income tax obligations are as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Deferred Tax Assets:
Employee Benefits	$	228.9	$	25.3	$	57.4	$	11.6	$	270.8	$	23.9	$	40.3	$	14.1
Derivative Liabilities	53.8		53.8		—		—		76.8		76.8		—		—
Regulatory Deferrals - Liabilities	529.5		146.6		285.7		42.1		390.7		90.9		215.4		24.3
Allowance for Uncollectible Accounts	125.5		60.5		20.7		7.9		104.1		48.8		21.5		6.2
Tax Effect - Tax Regulatory Liabilities	762.9		324.6		241.8		97.8		783.4		328.2		254.3		100.9
Net Operating Loss Carryforwards	16.7		—		—		—		7.5		—		—		—
Purchase Accounting Adjustment	62.0		—		—		—		67.2		—		—		—
Other	176.6		109.5		20.5		21.3		196.6		103.9		21.7		22.9
Total Deferred Tax Assets	1,955.9		720.3		626.1		180.7		1,897.1		672.5		553.2		168.4
Less:  Valuation Allowance	82.8		63.3		—		—		61.5		44.5		—		—
Net Deferred Tax Assets	$	1,873.1	$	657.0	$	626.1	$	180.7	$	1,835.6	$	628.0	$	553.2	$	168.4
Deferred Tax Liabilities:
Accelerated Depreciation and Other   Plant-Related Differences	$	4,793.7	$	1,602.0	$	1,643.7	$	523.8	$	4,426.0	$	1,509.5	$	1,553.7	$	482.9
Property Tax Accruals	95.3		40.7		41.3		6.7		88.1		40.5		33.7		6.3
Regulatory Amounts:
Regulatory Deferrals - Assets	1,251.9		406.4		407.9		165.2		1,260.3		438.3		337.6		198.4
Tax Effect - Tax Regulatory Assets	271.7		185.6		10.7		7.9		257.8		181.4		10.9		8.3
Goodwill-related Regulatory Asset - 1999 Merger	76.8		—		65.9		—		81.4		—		69.9		—
Employee Benefits	305.5		45.0		140.8		18.7		174.7		3.5		107.1		0.7
Derivative Assets	10.5		10.5		—		—		14.9		14.9		—		—
Other	135.6		6.8		16.7		21.2		129.5		2.0		19.8		9.8
Total Deferred Tax Liabilities	$	6,941.0	$	2,297.0	$	2,327.0	$	743.5	$	6,432.7	$	2,190.1	$	2,132.7	$	706.4

2022 Federal Legislation: On August 16, 2022, the Inflation Reduction Act of 2022 (IRA) was signed into law. This is a broad package of legislation that includes incentives and support for clean energy resource development. Most notable for Eversource, the investment tax credit (ITC) on offshore wind projects increases from 30 percent to 40 percent if certain requirements for labor and domestic content are met. The act also re-establishes the production tax credit for solar and wind energy projects, gives increased credit for projects in certain communities, and sets credits for qualifying clean energy generation and energy storage projects. The tax provisions of the IRA provide additional incentives for offshore wind projects and could reduce retail electricity costs for our customers related to those clean energy investments. The IRA includes other tax provisions focused on implementing a 15 percent minimum tax on adjusted financial statement income and a one percent excise tax on corporate share repurchases. The Department of Treasury and the Internal Revenue Service issued limited guidance in the fourth quarter; however, they are expected to issue additional needed guidance with respect to the application of the newly enacted IRA provisions in the future. We will continue to monitor and evaluate impacts on our consolidated financial statements. We currently do not expect the alternative minimum tax change to have a material impact on our earnings, financial condition or cash flows.

2021 Federal Legislation: On November 5, 2021, Congress passed the Infrastructure Investment and Jobs Act. The Act provided spending of more than $500 billion on roads, highways, bridges, public transit, and utilities. For water and sewer utilities, the Act restored the exclusion from a corporation’s income for contributions in aid of construction where the corporation is a water or sewer utility eliminated by the Tax Cuts and Jobs Act of 2017. Under the Act, a regulated public utility that provides water or sewage disposal services can treat money or property received from any person as a tax-free contribution to capital if it meets certain criteria for contributions made after 2020. The Act did not have a material impact on Eversource in 2021.

Carryforwards:  The following table provides the amounts and expiration dates of state tax credit and loss carryforwards and federal tax credit and net operating loss carryforwards:

	As of December 31,
	2022									2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Expiration Range	Eversource		CL&P		NSTAR Electric		PSNH		Expiration Range
State Net Operating Loss	$	288.1	$	—	$	—	$	—	2022 - 2041	$	138.3	$	—	$	—	$	—	2021 - 2040
State Tax Credit	204.5		137.7		—		—		2022 - 2027	197.7		137.0		—		—		2021 - 2026
State Charitable Contribution	20.1		—		—		—		2022 - 2026	23.7		—		—		—		2021 - 2025

In 2022, the Company increased its valuation allowance reserve for state credits by $21.3 million ($18.8 million for CL&P), net of tax, to reflect an update for expiring tax credits. In 2021, the Company increased its valuation allowance reserve for state credits by $13.0 million ($10.8 million for CL&P), net of tax, to reflect an update for expiring tax credits.

For 2022 and 2021, state credit and state loss carryforwards have been partially reserved by a valuation allowance of $82.8 million and $61.5 million (net of tax), respectively.      

Unrecognized Tax Benefits:  A reconciliation of the activity in unrecognized tax benefits, all of which would impact the effective tax rate if recognized, is as follows:

(Millions of Dollars)	Eversource		CL&P
Balance as of January 1, 2020	$	55.0	$	23.1
Gross Increases - Current Year	11.9		4.6
Gross Increases - Prior Year	1.4		0.7
Lapse of Statute of Limitations	(6.5)		(2.6)
Balance as of December 31, 2020	61.8		25.8
Gross Increases - Current Year	11.3		3.8
Gross Decreases - Prior Year	(0.3)		(0.6)
Lapse of Statute of Limitations	(7.0)		(2.8)
Balance as of December 31, 2021	65.8		26.2
Gross Increases - Current Year	11.5		3.5
Gross Decreases - Prior Year	(2.4)		(0.9)
Lapse of Statute of Limitations	(7.8)		(3.3)
Balance as of December 31, 2022	$	67.1	$	25.5

Interest and Penalties:  Interest on uncertain tax positions is recorded and generally classified as a component of Other Interest Expense on the statements of income.  However, when resolution of uncertainties results in the Company receiving interest income, any related interest benefit is recorded in Other Income, Net on the statements of income.  No penalties have been recorded. There has been no interest expense or income recognized on uncertain tax positions for the years ended December 31, 2022, 2021 or 2020. The accrued interest payable was $0.1 million as of both December 31, 2022 and 2021.

Tax Positions:  During 2022 and 2021, Eversource did not resolve any of its uncertain tax positions.

Open Tax Years:  The following table summarizes Eversource, CL&P, NSTAR Electric, and PSNH's tax years that remain subject to examination by major tax jurisdictions as of December 31, 2022:

Description	Tax Years
Federal	2022
Connecticut	2019 - 2022
Massachusetts	2019 - 2022
New Hampshire	2019 - 2022

Eversource does not estimate to have an earnings impact related to unrecognized tax benefits during the next twelve months.

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COMMITMENTS AND CONTINGENCIES

12 Months Ended

Dec. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES

A.     Environmental Matters

Eversource, CL&P, NSTAR Electric and PSNH are subject to environmental laws and regulations intended to mitigate or remove the effect of past operations and improve or maintain the quality of the environment.  These laws and regulations require the removal or the remedy of the effect on the environment of the disposal or release of certain specified hazardous substances at current and former operating sites. Eversource, CL&P, NSTAR Electric and PSNH have an active environmental auditing and training program and each believes it is substantially in compliance with all enacted laws and regulations.

Environmental reserves are accrued when assessments indicate it is probable that a liability has been incurred and an amount can be reasonably estimated.  The approach used estimates the liability based on the most likely action plan from a variety of available remediation options, including no action required or several different remedies ranging from establishing institutional controls to full site remediation and monitoring.  These liabilities are estimated on an undiscounted basis and do not assume that the amounts are recoverable from insurance companies or other third parties.  The environmental reserves include sites at different stages of discovery and remediation and do not include any unasserted claims.

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.  

The amounts recorded as environmental reserves are included in Other Current Liabilities and Other Long-Term Liabilities on the balance sheets and represent management's best estimate of the liability for environmental costs, and take into consideration site assessment, remediation and long-term monitoring costs.  The environmental reserves also take into account recurring costs of managing hazardous substances and pollutants, mandated expenditures to remediate contaminated sites and any other infrequent and non-recurring clean-up costs.  A reconciliation of the activity in the environmental reserves is as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
Balance as of January 1, 2021	$	102.4	$	12.3	$	4.7	$	7.1
Additions	23.4		4.4		—		—
Payments/Reductions	(10.4)		(2.8)		(1.4)		(0.8)
Balance as of December 31, 2021	115.4		13.9		3.3		6.3
Additions	12.6		0.9		0.4		0.5
Payments/Reductions	(5.4)		(0.9)		(0.3)		(0.7)
Balance as of December 31, 2022	$	122.6	$	13.9	$	3.4	$	6.1

The number of environmental sites for which remediation or long-term monitoring, preliminary site work or site assessment is being performed are as follows:

	Eversource	CL&P	NSTAR Electric	PSNH
2022	59	13	10	8
2021	61	14	11	9

The increase in the reserve balance was due primarily to changes in cost estimates at certain MGP sites at our natural gas business segment, which we now know will require additional remediation.

Included in the number of sites and reserve amounts above are former MGP sites that were operated several decades ago and manufactured natural gas from coal and other processes, which resulted in certain by-products remaining in the environment that may pose a potential risk to human health and the environment, for which Eversource may have potential liability.  The reserve balances related to these former MGP sites were $112.6 million and $105.6 million as of December 31, 2022 and 2021, respectively, and related primarily to the natural gas business segment.

As of December 31, 2022, for 15 environmental sites (7 for CL&P and 1 for NSTAR Electric) that are included in the Company's reserve for environmental costs, management cannot reasonably estimate the exposure to loss in excess of the reserve, or range of loss, as these sites are under investigation and/or there is significant uncertainty as to what remedial actions, if any, the Company may be required to undertake.  As of December 31, 2022, $25.8 million (including $4.4 million for CL&P and $0.1 million for NSTAR Electric) had been accrued as a liability for these sites.

As of December 31, 2022, for 7 environmental sites (1 for CL&P) that are included in the Company's reserve for environmental costs, the information known and the nature of the remediation options allow for the Company to estimate the range of losses for environmental costs.  As of December 31, 2022, $29.9 million (including $0.6 million for CL&P) has been accrued as a liability for these sites, which represents the low end of the range of the liabilities for environmental costs.  Management believes that additional losses of up to approximately $17 million ($0.3 million at CL&P) may be incurred in executing current remediation plans for these sites.

As of December 31, 2022, for the remaining 37 environmental sites (including 5 for CL&P, 9 for NSTAR Electric and 8 for PSNH) that are included in the Company's reserve for environmental costs, the $66.9 million accrual (including $8.9 million for CL&P, $3.3 million for NSTAR Electric and $6.1 million for PSNH) represents management's best estimate of the probable liability and no additional loss is estimable at this time.

PSNH, NSTAR Gas, EGMA and Yankee Gas have rate recovery mechanisms for MGP related environmental costs, therefore, changes in their respective environmental reserves do not impact Net Income. CL&P is allowed to defer certain environmental costs for future recovery.  NSTAR Electric does not have a separate environmental cost recovery regulatory mechanism.Long-Term Contractual Arrangements

Estimated Future Annual Costs:  The estimated future annual costs of significant executed, non-cancelable, long-term contractual arrangements in effect as of December 31, 2022 are as follows:

Eversource
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	751.8	$	952.6	$	954.8	$	983.0	$	998.5	$	8,141.1	$	12,781.8
Natural Gas Procurement	447.1		419.4		340.9		298.5		269.4		1,450.6		3,225.9
Purchased Power and Capacity	87.6		86.8		75.2		2.9		2.7		7.2		262.4
Peaker CfDs	20.3		21.1		17.9		16.0		11.4		64.4		151.1
Transmission Support Commitments	17.8		20.7		22.6		22.6		22.6		22.6		128.9
Total	$	1,324.6	$	1,500.6	$	1,411.4	$	1,323.0	$	1,304.6	$	9,685.9	$	16,550.1

CL&P
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	594.8	$	609.1	$	610.2	$	607.6	$	609.0	$	2,253.1	$	5,283.8
Purchased Power and Capacity	83.5		83.9		72.4		0.1		—		—		239.9
Peaker CfDs	20.3		21.1		17.9		16.0		11.4		64.4		151.1
Transmission Support Commitments	7.0		8.2		8.9		8.9		8.9		8.9		50.8
Total	$	705.6	$	722.3	$	709.4	$	632.6	$	629.3	$	2,326.4	$	5,725.6

NSTAR Electric
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	79.2	$	270.0	$	316.5	$	322.9	$	328.6	$	5,519.8	$	6,837.0
Purchased Power and Capacity	2.9		2.9		2.8		2.8		2.7		7.2		21.3
Transmission Support Commitments	7.0		8.1		8.9		8.9		8.9		8.9		50.7
Total	$	89.1	$	281.0	$	328.2	$	334.6	$	340.2	$	5,535.9	$	6,909.0

PSNH
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	77.8	$	73.5	$	28.1	$	52.5	$	60.9	$	368.2	$	661.0
Purchased Power and Capacity	1.2		—		—		—		—		—		1.2
Transmission Support Commitments	3.8		4.4		4.8		4.8		4.8		4.8		27.4
Total	$	82.8	$	77.9	$	32.9	$	57.3	$	65.7	$	373.0	$	689.6

Renewable Energy Purchase Contracts:  Renewable energy purchase contracts include non-cancellable commitments under contracts of CL&P, NSTAR Electric and PSNH for the purchase of energy and capacity from renewable energy facilities.  Such contracts extend through 2043 for CL&P, 2044 for NSTAR Electric and 2033 for PSNH.

Renewable Energy and Purchase Contracts includes long-term commitments of NSTAR Electric pertaining to the Vineyard Wind LLC contract awarded under the Massachusetts Clean Energy 83C procurement solicitation. NSTAR Electric, along with other Massachusetts distribution companies, entered into 20-year contracts to purchase electricity generated by this 800 megawatt offshore wind project. Construction on the Vineyard Wind project commenced in 2022. Estimated energy costs under this contract are expected to begin when the facilities are in service in 2024 and range between $240 million and $375 million per year under NSTAR Electric’s 20-year contract, totaling approximately $6.0 billion.

As required by 2018 regulation, CL&P and UI each entered into PURA-approved ten-year contracts in 2019 to purchase a combined total of approximately 9 million MWh annually from the Millstone Nuclear Power Station generation facility, which represents a combined amount of approximately 50 percent of the facility's output (approximately 40 percent by CL&P). The Millstone Nuclear Power Station has a 2,112 MW nameplate capacity. Energy deliveries and payments under these contracts began in 2019. Also as required by 2018 regulation, CL&P and UI each entered into PURA-approved eight-year contracts in 2019 to purchase a combined amount of approximately 18 percent of the Seabrook Nuclear Power Plant’s output (approximately 15 percent by CL&P) beginning January 1, 2022. The Seabrook Nuclear Power Plant has an approximate 1,250 MW nameplate capacity. The total estimated remaining future cost of the Millstone Nuclear Power Station and Seabrook Nuclear Power Plant energy purchase contracts are $2.9 billion and are reflected in the table above. CL&P sells the energy purchased under these contracts into the market and uses the proceeds from these energy sales to offset the contract costs.  As the net costs under these contracts are recovered from customers in future rates, the contracts do not have an impact on the net income of CL&P. These contracts do not meet the definition of a derivative, and accordingly, the costs of these contracts are being accounted for as incurred.

Excluded from the table above are long-term commitments of NSTAR Electric pertaining to the Massachusetts Clean Energy 83D contract, for which construction was suspended prior to December 31, 2021. Should the project attain feasibility and construction recommence, the estimated costs under the contract may potentially begin in 2023 and range between $150 million and $415 million per year under a 20-year contract, totaling approximately $6.7 billion.

The contractual obligations table above does not include long-term commitments signed by CL&P and NSTAR Electric, as required by the PURA and DPU, respectively, for the purchase of renewable energy and related products that are contingent on the future construction of energy facilities.

Natural Gas Procurement:  Eversource's natural gas distribution businesses have long-term contracts for the purchase, transportation and storage of natural gas as part of its portfolio of supplies, which extend through 2045.

Purchased Power and Capacity:  These contracts include capacity CfDs of CL&P through 2026, and various IPP contracts or purchase obligations for electricity which extend through 2024 for CL&P, 2031 for NSTAR Electric and 2023 for PSNH.

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 December 31, 2022 and 2021 were 674 MW and 675 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.  CL&P's portion of the costs and benefits of these contracts will be paid by, or refunded to, CL&P's customers.

The contractual obligations table above does not include CL&P's, NSTAR Electric's or PSNH's standard/basic service contracts for the purchase of energy supply, the amounts of which vary with customers' energy needs.

Peaker CfDs:  CL&P, along with UI, has three peaker CfDs for a total of approximately 500 MW of peaking capacity through 2042.  CL&P has a sharing agreement with UI, whereby CL&P is responsible for 80 percent and UI for 20 percent of the net costs or benefits of these CfDs.  The Peaker CfDs pay the generation facility owner the difference between capacity, forward reserve and energy market revenues and a cost-of-service payment stream for 30 years.  The ultimate cost or benefit to CL&P under these contracts will depend on the costs of plant operation and the prices that the projects receive for capacity and other products in the ISO-NE markets.  CL&P's portion of the amounts paid or received under the Peaker CfDs are recovered from, or refunded to, CL&P's customers.

Transmission Support Commitments:  Along with other New England utilities, CL&P, NSTAR Electric and PSNH entered into a series of agreements in the 1980’s to support the costs of, and receive rights to use, transmission and terminal facilities that were built to import electricity from the Hydro-Québec system in Canada. CL&P, NSTAR Electric and PSNH were obligated to pay, over a 30-year period that ended in 2020, their proportionate shares of the annual operation and maintenance expenses and capital costs of those facilities. On December 18, 2020, the parties to these agreements submitted to FERC an offer of settlement and amendments to these agreements implementing the terms of an extension for an additional 20-year period ending in 2040. On May 20, 2021, FERC approved this settlement, effective January 1, 2021.

The total costs incurred under these agreements were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Renewable Energy Purchase Contracts	$	678.1	$	609.2	$	584.2
Natural Gas Procurement	1,042.8		712.7		453.4
Purchased Power and Capacity	61.6		56.4		62.7
Peaker CfDs	13.4		24.3		22.7
Transmission Support Commitments	12.7		15.4		22.1

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Renewable Energy Purchase Contracts	$	513.2	$	90.8	$	74.1	$	457.1	$	84.7	$	67.4	$	426.3	$	88.8	$	69.1
Purchased Power and Capacity	57.7		3.0		0.9		53.1		3.0		0.3		59.3		3.1		0.3
Peaker CfDs	13.4		—		—		24.3		—		—		22.7		—		—
Transmission Support Commitments	5.0		5.0		2.7		6.1		6.0		3.3		8.7		8.7		4.7

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. The DOE Phase V trial is expected to begin in the third quarter of 2023.

D.    Guarantees and Indemnifications

In the normal course of business, Eversource parent provides credit assurances on behalf of its subsidiaries, including CL&P, NSTAR Electric and PSNH, in the form of guarantees. Management does not anticipate a material impact to net income or cash flows as a result of these various guarantees and indemnifications. 

Guarantees issued on behalf of unconsolidated entities, including equity method offshore wind investments, for which Eversource parent is the guarantor, are recorded at fair value as a liability on the balance sheet at the inception of the guarantee. Eversource regularly reviews performance risk under these guarantee arrangements, and in the event it becomes probable that Eversource parent will be required to perform under the guarantee, the amount of probable payment will be recorded. The fair value of guarantees issued on behalf of unconsolidated entities are recorded within Other Long-Term Liabilities on the balance sheet, and were $4.2 million and $7.3 million as of December 31, 2022 and 2021, respectively.

The following table summarizes Eversource parent's exposure to guarantees and indemnifications of its subsidiaries and affiliates to external parties, and primarily relates to its offshore wind business:  

As of December 31, 2022
Company (Obligor)	Description	Maximum Exposure (in millions)		Expiration Dates
North East Offshore LLC	Construction-related purchase agreements with third-party contractors (1)	$	717.6	(1)
Sunrise Wind LLC	Construction-related purchase agreements with third-party contractors (2)	311.5		2025 - 2026
Revolution Wind, LLC	Construction-related purchase agreements with third-party contractors (3)	419.1		2024 - 2027
South Fork Wind, LLC	Construction-related purchase agreements with third-party contractors (4)	142.1		2023 - 2026
Eversource Investment LLC	Funding and indemnification obligations of North East Offshore LLC (5)	77.0		(5)
South Fork Wind, LLC	Power Purchase Agreement Security (6)	7.1		(6)
Sunrise Wind LLC	OREC capacity production (7)	2.2		(7)
Bay State Wind LLC	Real estate purchase	2.5		2023
South Fork Wind, LLC	Transmission interconnection	1.2		—
Eversource Investment LLC	Letters of Credit (8)	4.3		—
Various	Surety bonds (9)	35.7		2023
Eversource Service	Lease payments for real estate	0.5		2024

(1)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, North East Offshore LLC (NEO), under which Eversource parent agreed to guarantee 50 percent of NEO’s performance of obligations under certain purchase agreements with third-party contractors, in an aggregate amount not to exceed $1.3 billion with an expiration date in 2025. Eversource parent also issued a separate guarantee to Ørsted on behalf of NEO, under which Eversource parent agreed to guarantee 50 percent of NEO’s payment obligations under certain offshore wind project construction-related agreements with Ørsted in an aggregate amount not to exceed $62.5 million and expiring upon full performance of the guaranteed obligation. Any amounts paid under this guarantee to Ørsted will count toward, but not increase, the maximum amount of the Funding Guarantee described in Note 5, below.

(2)     Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an aggregate amount not to exceed $465.8 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from March 2025 and April 2026 and (ii) full performance of the guaranteed obligations.     

(3)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Revolution Wind, LLC, whereby Eversource parent will guarantee Revolution Wind, LLC's performance of certain obligations, in an aggregate amount not to exceed $546.7 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from May 2024 and November 2027 and (ii) full performance of the guaranteed obligations.

(4)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations in connection with construction-related purchase agreements. Under these guarantees, Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in a total aggregate amount not to exceed $207.7 million. Eversource parent’s obligations under these guarantees expire upon the earlier of (i) dates ranging from June 2023 and August 2026 and (ii) full performance of the guaranteed obligations.

(5)    Eversource parent issued a guarantee (Funding Guarantee) on behalf of Eversource Investment LLC (EI), its wholly-owned subsidiary that holds a 50 percent ownership interest in NEO, under which Eversource parent agreed to guarantee certain funding obligations and certain indemnification payments of EI under the operating agreement of NEO, in an amount not to exceed $910 million. The guaranteed obligations include payment of EI's funding obligations during the construction phase of NEO’s underlying offshore wind projects and indemnification obligations associated with third party credit support for its investment in NEO. Eversource parent’s obligations under the Funding Guarantee expire upon the full performance of the guaranteed obligations.

(6)    Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in an amount not to exceed $7.1 million, under a Power Purchase Agreement between the Long Island Power Authority and South Fork Wind, LLC (the Agreement). The guarantee expires upon the later of (i) the end of the Agreement term and (ii) full performance of the guarantee obligations.

(7)    Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an amount not to exceed $15.4 million, under the Offshore Wind Renewable Energy Certificate Purchase and Sale Agreement (the Agreement). The Agreement was executed by and between the New York State Energy Research and Development Authority (NYSERDA) and Sunrise Wind LLC. The guarantee expires upon the full performance of the guaranteed obligations.     Effective January 1, 2023, exposure under the guarantee increased from $2.2 million to $11.0 million.

(8)    On September 16, 2020, Eversource parent entered into a guarantee on behalf of EI, which holds Eversource's investments in offshore wind-related equity method investments, under which Eversource parent would guarantee EI's obligations under a letter of credit facility with a financial institution that EI may request in an aggregate amount of up to approximately $25 million. In January 2022, Eversource parent issued two letters of credit on behalf of South Fork Wind, LLC related to future decommissioning obligations of certain onshore transmission assets totaling $4.3 million.

(9)    Surety bond expiration dates reflect termination dates, the majority of which will be renewed or extended.  Certain surety bonds contain credit ratings triggers that would require Eversource parent to post collateral in the event that the unsecured debt credit ratings of Eversource parent are downgraded.

2023 Guaranty: In the first quarter of 2023, Eversource parent issued an additional guaranty on behalf of Sunrise Wind LLC totaling $58.1 million, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain contractual obligations.

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 December 31, 2022 and 2021. This reserve represents the difference between the billed rates during the second complaint period and a 10.57 percent base ROE and 11.74 percent incentive cap. The reserve consisted of $21.4 million for CL&P, $14.6 million for NSTAR Electric and $3.1 million for PSNH as of both December 31, 2022 and 2021.

On October 16, 2018, FERC issued an order on all four complaints describing how it intends to address the issues that were remanded by the Court. FERC proposed a new framework to determine (1) whether an existing ROE is unjust and unreasonable and, if so, (2) how to calculate a replacement ROE. Initial briefs were filed by the NETOs, Complainants and FERC Trial Staff on January 11, 2019 and reply briefs were filed on March 8, 2019. The NETOs' brief was supportive of the overall ROE methodology determined in the October 16, 2018 order provided the FERC does not change the proposed methodology or alter its implementation in a manner that has a material impact on the results.

The FERC order included illustrative calculations for the first complaint using FERC's proposed frameworks with financial data from that complaint. Those illustrative calculations indicated that for the first complaint period, for the NETOs, which FERC concludes are of average financial risk, the preliminary just and reasonable base ROE is 10.41 percent and the preliminary incentive cap on total ROE is 13.08 percent. If the results of the illustrative calculations were included in a final FERC order for each of the complaint periods, then a 10.41 percent base ROE and a 13.08 percent incentive cap would not have a significant impact on our financial statements for all of the complaint periods. These preliminary calculations are not binding and do not represent what we believe to be the most likely outcome of a final FERC order.

On November 21, 2019, FERC issued Opinion No. 569 affecting the two pending transmission ROE complaints against the Midcontinent ISO (MISO) transmission owners, in which FERC adopted a new methodology for determining base ROEs. Various parties sought rehearing. On December 23, 2019, the NETOs filed supplementary materials in the NETOs' four pending cases to respond to this new methodology because of the uncertainty of the applicability to the NETOs' cases. On May 21, 2020, the FERC issued its order in Opinion No. 569-A on the rehearing of the MISO transmission owners' cases, in which FERC again changed its methodology for determining the MISO transmission owners' base ROEs. On November 19, 2020, the FERC issued Opinion No. 569-B denying rehearing of Opinion No. 569-A and reaffirmed the methodology previously adopted in Opinion No. 569-A. The new methodology differs significantly from the methodology proposed by FERC in its October 16, 2018 order to determine the NETOs' base ROEs in its four pending cases. FERC Opinion Nos. 569-A and 569-B 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. At this time, Eversource cannot predict how and when FERC will address the Court’s findings on the remand of the MISO FERC opinions or any potential associated impact on the NETOs’ four pending ROE complaint cases.

Given the significant uncertainty regarding the applicability of the FERC opinions in the MISO transmission owners’ two complaint cases to the NETOs’ pending four complaint cases, Eversource concluded that there is no reasonable basis for a change to the reserve or recognized ROEs for any of the complaint periods at this time. As well, Eversource cannot reasonably estimate a range of loss for any of the four complaint proceedings

at this time. Eversource, CL&P, NSTAR Electric and PSNH currently record revenues at the 10.57 percent base ROE and incentive cap at 11.74 percent established in the October 16, 2014 FERC order.

A change of 10 basis points to the base ROE used to establish the reserves would impact Eversource’s after-tax earnings by an average of approximately $3 million for each of the four 15-month complaint periods.

F.    Eversource and NSTAR Electric Boston Harbor Civil Action

In 2016, the United States Attorney on behalf of the United States Army Corps of Engineers filed a civil action in the United States District Court for the District of Massachusetts against NSTAR Electric, HEEC, and the Massachusetts Water Resources Authority (together with NSTAR Electric and HEEC, the "Defendants").  The action alleged that the Defendants failed to comply with certain permitting requirements related to the placement of the HEEC-owned electric distribution cable beneath Boston Harbor.  The parties reached a settlement pursuant to which HEEC agreed to install a new 115kV distribution cable across Boston Harbor to Deer Island, utilizing a different route, and remove portions of the existing cable. Construction of the new distribution cable was completed in August 2019 and removal of the portions of the existing cable was completed in January 2020.

On February 9, 2023, the parties filed a Voluntary Stipulation of Dismissal with Prejudice with the United States District Court for the District of Massachusetts whereby the parties agreed to dismiss all remaining claims, crossclaims and counterclaims with prejudice.

G.     CL&P Regulatory Matters

CL&P Tropical Storm Isaias Response Investigation: On April 28, 2021, PURA issued a final decision on CL&P’s compliance with its emergency response plan that concluded CL&P failed to comply with certain storm performance standards and was imprudent in certain instances regarding its preparation for, and response to, Tropical Storm Isaias. Based on its findings, PURA ordered CL&P to adjust its future rates in a pending or future rate proceeding to reflect a monetary penalty in the form of a downward adjustment of 90 basis points in its allowed rate of return on equity (ROE), which is currently 9.25 percent. On July 14, 2021, PURA issued a final decision in a penalty proceeding that included an assessment of $28.6 million, consisting of a $28.4 million civil penalty for non-compliance with storm performance standards to be provided as credits on customer bills and a $0.2 million fine for violations of accident reporting requirements to be paid to the State of Connecticut’s general fund. The $28.4 million performance penalty was credited to customers on electric bills beginning on September 1, 2021 over a one-year period. The $28.4 million is the maximum statutory penalty amount under applicable Connecticut law in effect at the time of Tropical Storm Isaias, which is 2.5 percent of CL&P’s annual distribution revenues. The liability for the performance penalty was recorded as a current regulatory liability on CL&P’s balance sheet and as a reduction to Operating Revenues on the year ended December 31, 2021 statement of income.

CL&P Settlement Agreement: On October 1, 2021, CL&P entered into a settlement agreement with the DEEP, Office of Consumer Counsel, Office of the Attorney General and the Connecticut Industrial Energy Consumers, resolving certain issues that arose in then-pending regulatory proceedings initiated by PURA. PURA approved the settlement agreement on October 27, 2021. In the settlement agreement, CL&P agreed to provide a total of $65 million of customer credits, which were distributed based on customer sales over a two-month billing period from December 1, 2021 to January 31, 2022. CL&P also agreed to irrevocably set aside $10 million in a customer assistance fund to provide bill payment assistance to certain existing non-hardship and hardship customers carrying arrearages, as approved by PURA, with the objective of disbursing the funds prior to April 30, 2022. Those customers were provided with $10 million of bill forgiveness in the first quarter of 2022. CL&P recorded a current regulatory liability of $75 million on the balance sheet associated with the provisions of the settlement agreement, with a $65 million pre-tax charge as a reduction to Operating Revenues associated with the customer credits and a $10 million charge to Operations and Maintenance expense associated with the customer assistance fund on the year ended December 31, 2021 statement of income.

In exchange for the $75 million of customer credits and assistance, PURA’s interim rate reduction docket was resolved without findings. As a result of the settlement agreement, neither the 90 basis point reduction to CL&P’s return on equity introduced in PURA’s storm-related decision issued April 28, 2021, nor the 45 basis point reduction to CL&P’s return on equity included in PURA’s decision issued September 14, 2021 in the interim rate reduction docket, will be implemented. CL&P has also agreed to freeze its current base distribution rates, subject to the customer credits described above, until no earlier than January 1, 2024. The rate freeze applies only to base distribution rates (including storm costs) and not to other rate mechanisms such as the retail rate components, rate reconciling mechanisms, formula rates and any other adjustment mechanisms. The rate freeze also does not apply to any cost recovery mechanism outside of the base distribution rates with regard to grid-modernization initiatives or any other proceedings, either currently pending or that may be initiated during the rate freeze period, that may place additional obligations on CL&P. The approval of the settlement agreement satisfies the Connecticut statute of rate review requirements that requires electric utilities to file a distribution rate case within four years of the last rate case.

As part of the settlement agreement, CL&P agreed to withdraw with prejudice its pending appeals of PURA’s decisions dated April 28, 2021 and July 14, 2021 related to Storm Isaias and agreed to waive its right to file an appeal and seek a judicial stay of the September 14, 2021 decision in the interim rate reduction docket. The settlement agreement assures that CL&P will have the opportunity to petition for and demonstrate the prudency of the storm costs incurred to respond to customer outages associated with Storm Isaias in a future ratemaking proceeding.

The cumulative pre-tax impact of the settlement agreement and the Storm Isaias assessment imposed in PURA’s April 28, 2021 and July 14, 2021 decisions totaled $103.6 million, and the after-tax earnings impact was $86.1 million, or $0.25 per share, for the year ended December 31, 2021.

H.     Litigation and Legal Proceedings

Eversource, including CL&P, NSTAR Electric and PSNH, are involved in legal, tax and regulatory proceedings regarding matters arising in the ordinary course of business, which involve management's assessment to determine the probability of whether a loss will occur and, if probable, its best estimate of probable loss.  The Company records and discloses losses when these losses are probable and reasonably estimable, and discloses matters when losses are probable but not estimable or when losses are reasonably possible.  Legal costs related to the defense of loss contingencies are expensed as incurred.

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LEASES

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

LEASES

LEASES

Eversource, including CL&P, NSTAR Electric and PSNH, has entered into lease agreements as a lessee for the use of land, office space, service centers, vehicles, information technology, and equipment. These lease agreements are classified as either finance or operating leases and the liability and right-of-use asset are recognized on the balance sheet at lease commencement.  Leases with an initial term of 12 months or less are not recorded on the balance sheet and are recognized as lease expense on a straight-line basis over the lease term.

Eversource determines whether or not a contract contains a lease based on whether or not it provides Eversource with the use of a specifically identified asset for a period of time, as well as both the right to direct the use of that asset and receive the significant economic benefits of the asset. Eversource has elected the practical expedient to not separate non-lease components from lease components and instead to account for both as a single lease component, with the exception of the information technology asset class where the lease and non-lease components are separated.

The provisions of Eversource, CL&P, NSTAR Electric and PSNH lease agreements contain renewal options. The renewal options range from one year to twenty years. The renewal period is included in the measurement of the lease liability if it is reasonably certain that Eversource will exercise these renewal options.

For leases entered into or modified after the January 1, 2019 implementation date of the leases standard under Topic 842, the discount rate utilized for classification and measurement purposes as of the inception date of the lease is based on each company's collateralized incremental interest rate to borrow over a comparable term for an individual lease because the rate implicit in the lease is not determinable.

CL&P and PSNH entered into certain contracts for the purchase of energy that qualify as leases.  These contracts do not have minimum lease payments and therefore are not recognized as a lease liability on the balance sheet and are not reflected in the future minimum lease payments table below.  Expense related to these contracts is included as variable lease cost in the table below. The expense and long-term obligation for these contracts are also included in Note 13B, "Commitments and Contingencies - Long-Term Contractual Arrangements," to the financial statements.  

The components of lease cost, prior to amounts capitalized, are as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Finance Lease Cost:
Amortization of Right-of-use-Assets	$	8.3	$	4.6	$	2.6
Interest on Lease Liabilities	2.0		3.9		1.4
Total Finance Lease Cost	10.3		8.5		4.0
Operating Lease Cost	11.6		12.2		11.1
Variable Lease Cost	78.1		61.0		57.8
Total Lease Cost	$	100.0	$	81.7	$	72.9

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Finance Lease Cost:
Amortization of Right-of-use-Assets	$	—	$	0.2	$	0.1	$	0.5	$	0.2	$	0.1	$	0.7	$	0.2	$	0.1
Interest on Lease Liabilities	—		0.6		—		0.1		0.6		—		0.3		0.6		—
Total Finance Lease Cost	—		0.8		0.1		0.6		0.8		0.1		1.0		0.8		0.1
Operating Lease Cost	0.3		2.3		0.1		0.3		2.3		0.1		0.6		2.1		0.1
Variable Lease Cost	25.6		—		52.5		16.2		—		44.8		12.2		—		45.6
Total Lease Cost	$	25.9	$	3.1	$	52.7	$	17.1	$	3.1	$	45.0	$	13.8	$	2.9	$	45.8

Operating lease cost, net of the capitalized portion, is included in Operations and Maintenance (or Purchased Power, Purchased Natural Gas and Transmission expense for transmission leases) on the statements of income. Amortization of finance lease assets is included in Depreciation on the statements of income. Interest expense on finance leases is included in Interest Expense on the statements of income.

Supplemental balance sheet information related to leases is as follows:

		As of December 31, 2022								As of December 31, 2021
(Millions of Dollars)	Balance Sheet Classification	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Operating Leases:
Right-of-use-Assets, Net	Other Long-Term Assets	$	56.9	$	2.2	$	22.5	$	—	$	47.2	$	0.1	$	24.3	$	0.3
Operating Lease Liabilities
Current Portion	Other Current Liabilities	$	9.0	$	0.6	$	1.2	$	—	$	10.0	$	0.1	$	1.1	$	—
Long-Term	Other Long-Term Liabilities	47.9		1.6		21.3		—		37.2		—		23.2		0.3
Total Operating Lease Liabilities		$	56.9	$	2.2	$	22.5	$	—	$	47.2	$	0.1	$	24.3	$	0.3
Finance Leases:
Right-of-use-Assets, Net	Property, Plant and Equipment, Net	$	54.5	$	—	$	3.2	$	—	$	58.0	$	—	$	3.3	$	0.7
Finance Lease Liabilities
Current Portion	Other Current Liabilities	$	3.8	$	—	$	—	$	—	$	3.9	$	—	$	—	$	0.1
Long-Term	Other Long-Term Liabilities	54.2		—		4.9		—		55.4		—		4.9		0.6
Total Finance Lease Liabilities		$	58.0	$	—	$	4.9	$	—	$	59.3	$	—	$	4.9	$	0.7

The finance lease payments that NSTAR Electric will make over the next twelve months are entirely interest-related, due to escalating payments. As such, none of the finance lease payments over the next twelve months will reduce the finance lease liability.

Other information related to leases is as follows:

	As of December 31,
	2022								2021
	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Weighted-Average Remaining Lease Term (Years):
Operating Leases	11		4		17		—		13		7		18		7
Finance Leases	15		—		19		—		16		—		20		7
Weighted-Average Discount Rate (Percentage):
Operating Leases	3.2	%	3.8	%	4.0	%	—	%	4.1	%	3.0	%	4.0	%	3.7	%
Finance Leases	2.7	%	—	%	2.9	%	—	%	2.7	%	—	%	2.9	%	3.5	%

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2022
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	11.3	$	0.3	$	2.1	$	0.1
Operating Cash Flows from Finance Leases	2.0		—		0.6		—
Financing Cash Flows from Finance Leases	3.9		—		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	18.9		2.4		—		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	3.5		—		—		—

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2021
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	12.1	$	0.3	$	2.1	$	0.1
Operating Cash Flows from Finance Leases	3.4		0.1		0.6		—
Financing Cash Flows from Finance Leases	4.1		1.4		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	2.1		—		1.9		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	2.3		—		—		—

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2020
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	10.9	$	0.6	$	1.8	$	0.1
Operating Cash Flows from Finance Leases	1.7		0.3		0.6		—
Financing Cash Flows from Finance Leases	2.8		1.6		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	0.6		0.1		0.2		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	0.7		—		0.3		—

In 2020, Eversource also acquired $14.7 million of right-of-use assets in exchange for the assumption of new operating lease liabilities and $54.2 million of right-of-use assets in exchange for the assumption of new finance lease liabilities as a result of the CMA asset acquisition.

Future minimum lease payments, excluding variable costs, under long-term leases, as of December 31, 2022 are as follows:

	Operating Leases						Finance Leases
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		Eversource		NSTAR Electric
Year Ending December 31,
2023	$	10.3	$	0.7	$	2.1	$	5.9	$	0.6
2024	9.3		0.7		2.1		5.9		0.6
2025	6.4		0.7		1.7		5.9		0.6
2026	5.5		0.3		1.7		5.4		0.7
2027	5.2		—		1.7		5.4		0.7
Thereafter	31.2		—		23.6		50.9		11.8
Future lease payments	67.9		2.4		32.9		79.4		15.0
Less amount representing interest	11.0		0.2		10.4		21.4		10.1
Present value of future minimum lease payments	$	56.9	$	2.2	$	22.5	$	58.0	$	4.9

LEASES

LEASES

Eversource, including CL&P, NSTAR Electric and PSNH, has entered into lease agreements as a lessee for the use of land, office space, service centers, vehicles, information technology, and equipment. These lease agreements are classified as either finance or operating leases and the liability and right-of-use asset are recognized on the balance sheet at lease commencement.  Leases with an initial term of 12 months or less are not recorded on the balance sheet and are recognized as lease expense on a straight-line basis over the lease term.

Eversource determines whether or not a contract contains a lease based on whether or not it provides Eversource with the use of a specifically identified asset for a period of time, as well as both the right to direct the use of that asset and receive the significant economic benefits of the asset. Eversource has elected the practical expedient to not separate non-lease components from lease components and instead to account for both as a single lease component, with the exception of the information technology asset class where the lease and non-lease components are separated.

The provisions of Eversource, CL&P, NSTAR Electric and PSNH lease agreements contain renewal options. The renewal options range from one year to twenty years. The renewal period is included in the measurement of the lease liability if it is reasonably certain that Eversource will exercise these renewal options.

For leases entered into or modified after the January 1, 2019 implementation date of the leases standard under Topic 842, the discount rate utilized for classification and measurement purposes as of the inception date of the lease is based on each company's collateralized incremental interest rate to borrow over a comparable term for an individual lease because the rate implicit in the lease is not determinable.

CL&P and PSNH entered into certain contracts for the purchase of energy that qualify as leases.  These contracts do not have minimum lease payments and therefore are not recognized as a lease liability on the balance sheet and are not reflected in the future minimum lease payments table below.  Expense related to these contracts is included as variable lease cost in the table below. The expense and long-term obligation for these contracts are also included in Note 13B, "Commitments and Contingencies - Long-Term Contractual Arrangements," to the financial statements.  

The components of lease cost, prior to amounts capitalized, are as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Finance Lease Cost:
Amortization of Right-of-use-Assets	$	8.3	$	4.6	$	2.6
Interest on Lease Liabilities	2.0		3.9		1.4
Total Finance Lease Cost	10.3		8.5		4.0
Operating Lease Cost	11.6		12.2		11.1
Variable Lease Cost	78.1		61.0		57.8
Total Lease Cost	$	100.0	$	81.7	$	72.9

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Finance Lease Cost:
Amortization of Right-of-use-Assets	$	—	$	0.2	$	0.1	$	0.5	$	0.2	$	0.1	$	0.7	$	0.2	$	0.1
Interest on Lease Liabilities	—		0.6		—		0.1		0.6		—		0.3		0.6		—
Total Finance Lease Cost	—		0.8		0.1		0.6		0.8		0.1		1.0		0.8		0.1
Operating Lease Cost	0.3		2.3		0.1		0.3		2.3		0.1		0.6		2.1		0.1
Variable Lease Cost	25.6		—		52.5		16.2		—		44.8		12.2		—		45.6
Total Lease Cost	$	25.9	$	3.1	$	52.7	$	17.1	$	3.1	$	45.0	$	13.8	$	2.9	$	45.8

Operating lease cost, net of the capitalized portion, is included in Operations and Maintenance (or Purchased Power, Purchased Natural Gas and Transmission expense for transmission leases) on the statements of income. Amortization of finance lease assets is included in Depreciation on the statements of income. Interest expense on finance leases is included in Interest Expense on the statements of income.

Supplemental balance sheet information related to leases is as follows:

		As of December 31, 2022								As of December 31, 2021
(Millions of Dollars)	Balance Sheet Classification	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Operating Leases:
Right-of-use-Assets, Net	Other Long-Term Assets	$	56.9	$	2.2	$	22.5	$	—	$	47.2	$	0.1	$	24.3	$	0.3
Operating Lease Liabilities
Current Portion	Other Current Liabilities	$	9.0	$	0.6	$	1.2	$	—	$	10.0	$	0.1	$	1.1	$	—
Long-Term	Other Long-Term Liabilities	47.9		1.6		21.3		—		37.2		—		23.2		0.3
Total Operating Lease Liabilities		$	56.9	$	2.2	$	22.5	$	—	$	47.2	$	0.1	$	24.3	$	0.3
Finance Leases:
Right-of-use-Assets, Net	Property, Plant and Equipment, Net	$	54.5	$	—	$	3.2	$	—	$	58.0	$	—	$	3.3	$	0.7
Finance Lease Liabilities
Current Portion	Other Current Liabilities	$	3.8	$	—	$	—	$	—	$	3.9	$	—	$	—	$	0.1
Long-Term	Other Long-Term Liabilities	54.2		—		4.9		—		55.4		—		4.9		0.6
Total Finance Lease Liabilities		$	58.0	$	—	$	4.9	$	—	$	59.3	$	—	$	4.9	$	0.7

The finance lease payments that NSTAR Electric will make over the next twelve months are entirely interest-related, due to escalating payments. As such, none of the finance lease payments over the next twelve months will reduce the finance lease liability.

Other information related to leases is as follows:

	As of December 31,
	2022								2021
	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Weighted-Average Remaining Lease Term (Years):
Operating Leases	11		4		17		—		13		7		18		7
Finance Leases	15		—		19		—		16		—		20		7
Weighted-Average Discount Rate (Percentage):
Operating Leases	3.2	%	3.8	%	4.0	%	—	%	4.1	%	3.0	%	4.0	%	3.7	%
Finance Leases	2.7	%	—	%	2.9	%	—	%	2.7	%	—	%	2.9	%	3.5	%

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2022
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	11.3	$	0.3	$	2.1	$	0.1
Operating Cash Flows from Finance Leases	2.0		—		0.6		—
Financing Cash Flows from Finance Leases	3.9		—		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	18.9		2.4		—		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	3.5		—		—		—

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2021
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	12.1	$	0.3	$	2.1	$	0.1
Operating Cash Flows from Finance Leases	3.4		0.1		0.6		—
Financing Cash Flows from Finance Leases	4.1		1.4		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	2.1		—		1.9		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	2.3		—		—		—

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2020
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	10.9	$	0.6	$	1.8	$	0.1
Operating Cash Flows from Finance Leases	1.7		0.3		0.6		—
Financing Cash Flows from Finance Leases	2.8		1.6		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	0.6		0.1		0.2		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	0.7		—		0.3		—

In 2020, Eversource also acquired $14.7 million of right-of-use assets in exchange for the assumption of new operating lease liabilities and $54.2 million of right-of-use assets in exchange for the assumption of new finance lease liabilities as a result of the CMA asset acquisition.

Future minimum lease payments, excluding variable costs, under long-term leases, as of December 31, 2022 are as follows:

	Operating Leases						Finance Leases
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		Eversource		NSTAR Electric
Year Ending December 31,
2023	$	10.3	$	0.7	$	2.1	$	5.9	$	0.6
2024	9.3		0.7		2.1		5.9		0.6
2025	6.4		0.7		1.7		5.9		0.6
2026	5.5		0.3		1.7		5.4		0.7
2027	5.2		—		1.7		5.4		0.7
Thereafter	31.2		—		23.6		50.9		11.8
Future lease payments	67.9		2.4		32.9		79.4		15.0
Less amount representing interest	11.0		0.2		10.4		21.4		10.1
Present value of future minimum lease payments	$	56.9	$	2.2	$	22.5	$	58.0	$	4.9

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FAIR VALUE OF FINANCIAL INSTRUMENTS

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

FAIR VALUE OF FINANCIAL INSTRUMENTS

FAIR VALUE OF FINANCIAL INSTRUMENTS

The following methods and assumptions were used to estimate the fair value of each of the following financial instruments:

Preferred Stock, Long-Term Debt and Rate Reduction Bonds:  The fair value of CL&P's and NSTAR Electric's preferred stock is based upon pricing models that incorporate interest rates and other market factors, valuations or trades of similar securities and cash flow projections.  The fair value of long-term debt and RRB debt securities is based upon pricing models that incorporate quoted market prices for those issues or similar issues adjusted for market conditions, credit ratings of the respective companies and treasury benchmark yields.  The fair values provided in the table below are classified as Level 2 within the fair value hierarchy.  Carrying amounts and estimated fair values are as follows:

	Eversource				CL&P				NSTAR Electric				PSNH
(Millions of Dollars)	Carrying Amount		Fair Value		Carrying Amount		Fair Value		Carrying Amount		Fair Value		Carrying Amount		Fair Value
As of December 31, 2022:
Preferred Stock Not Subject to Mandatory Redemption	$	155.6	$	136.7	$	116.2	$	99.2	$	43.0	$	37.5	$	—	$	—
Long-Term Debt	21,044.1		18,891.3		4,216.5		3,828.3		4,425.1		4,091.8		1,164.6		970.5
Rate Reduction Bonds	453.7		424.7		—		—		—		—		453.7		424.7
As of December 31, 2021:
Preferred Stock Not Subject to Mandatory Redemption	$	155.6	$	166.3	$	116.2	$	122.3	$	43.0	$	44.0	$	—	$	—
Long-Term Debt	18,216.7		19,636.3		4,215.4		4,848.9		3,985.4		4,453.5		1,163.8		1,220.6
Rate Reduction Bonds	496.9		543.3		—		—		—		—		496.9		543.3

Derivative Instruments and Marketable Securities: Derivative instruments and investments in marketable securities are carried at fair value.  For further information, see Note 4, "Derivative Instruments," and Note 5, "Marketable Securities," to the financial statements.  

See Note 1G, "Summary of Significant Accounting Policies – Fair Value Measurements," for the fair value measurement policy and the fair value hierarchy.

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ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

The changes in accumulated other comprehensive income/(loss) by component, net of tax, are as follows:

	For the Year Ended December 31, 2022								For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Qualified Cash Flow Hedging Instruments		Unrealized Gains/(Losses) on Marketable Securities		Defined Benefit Plans		Total		Qualified Cash Flow Hedging Instruments		Unrealized Gains/(Losses) on Marketable Securities		Defined Benefit Plans		Total
Balance as of January 1st	$	(0.4)	$	0.4	$	(42.3)	$	(42.3)	$	(1.4)	$	1.1	$	(76.1)	$	(76.4)
OCI Before Reclassifications	—		(1.6)		(2.5)		(4.1)		—		(0.7)		24.1		23.4
Amounts Reclassified from AOCI	—		—		7.0		7.0		1.0		—		9.7		10.7
Net OCI	—		(1.6)		4.5		2.9		1.0		(0.7)		33.8		34.1
Balance as of December 31st	$	(0.4)	$	(1.2)	$	(37.8)	$	(39.4)	$	(0.4)	$	0.4	$	(42.3)	$	(42.3)

Defined benefit plan OCI amounts before reclassifications relate to actuarial gains and losses that arose during the year and were recognized in AOCI. The unamortized actuarial gains and losses and prior service costs on the defined benefit plans are amortized from AOCI into Other Income, Net over the average future employee service period, and are reflected in amounts reclassified from AOCI. The related tax effects of the defined benefit plan OCI amounts before reclassifications recognized in AOCI were net deferred tax assets of $1.3 million and $6.0 million in 2022 and 2020, respectively and were net deferred tax liabilities of $8.3 million in 2021.

The following table sets forth the amounts reclassified from AOCI by component and the impacted line item on the statements of income:

	Amounts Reclassified from AOCI
Eversource (Millions of Dollars)	For the Years Ended December 31,						Statements of Income Line Item Impacted
	2022		2021		2020
Qualified Cash Flow Hedging Instruments	$	—	$	(1.7)	$	(2.5)	Interest Expense
Tax Effect	—		0.7		0.9		Income Tax Expense
Qualified Cash Flow Hedging Instruments, Net of Tax	$	—	$	(1.0)	$	(1.6)
Defined Benefit Plan Costs:
Amortization of Actuarial Losses	$	(9.0)	$	(13.1)	$	(8.1)	Other Income, Net (1)
Amortization of Prior Service Cost	(0.3)		—		(0.3)		Other Income, Net (1)
Total Defined Benefit Plan Costs	(9.3)		(13.1)		(8.4)
Tax Effect	2.3		3.4		2.1		Income Tax Expense
Defined Benefit Plan Costs, Net of Tax	$	(7.0)	$	(9.7)	$	(6.3)
Total Amounts Reclassified from AOCI, Net of Tax	$	(7.0)	$	(10.7)	$	(7.9)

(1)    These amounts are included in the computation of net periodic Pension, SERP and PBOP costs.  See Note 1K, "Summary of Significant Accounting Policies – Other Income, Net" and Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," for further information.

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DIVIDEND RESTRICTIONS

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

DIVIDEND RESTRICTIONS

DIVIDEND RESTRICTIONS

Eversource parent's ability to pay dividends may be affected by certain state statutes, the ability of its subsidiaries to pay common dividends and the leverage restriction tied to its consolidated total indebtedness to total capitalization ratio requirement in its revolving credit agreements.  Pursuant to the joint revolving credit agreement of Eversource, CL&P, PSNH, NSTAR Gas, Yankee Gas, EGMA and Aquarion Water Company of Connecticut, and to the NSTAR Electric revolving credit agreement, each company is required to maintain consolidated total indebtedness to total capitalization ratio of no greater than 65 percent at the end of each fiscal quarter. As of December 31, 2022, all companies were in compliance with such covenant and in compliance with all such provisions of the revolving credit agreements that may restrict the payment of dividends as of December 31, 2022.

The Retained Earnings balances subject to dividend restrictions were $5.53 billion for Eversource, $2.46 billion for CL&P, $2.92 billion for NSTAR Electric and $572.1 million for PSNH as of December 31, 2022.

CL&P, NSTAR Electric and PSNH are subject to Section 305 of the Federal Power Act that makes it unlawful for a public utility to make or pay a dividend from any funds "properly included in its capital account." Management believes that this Federal Power Act restriction, as applied to CL&P, NSTAR Electric and PSNH, would not be construed or applied by the FERC to prohibit the payment of dividends from retained earnings for lawful and legitimate business purposes. In addition, certain state statutes may impose additional limitations on such companies and, including but not limited to, on NSTAR Gas, Yankee Gas, EGMA, Aquarion Water Company of Connecticut, Aquarion Water Company of Massachusetts and Aquarion Water Company of New Hampshire. Such state law restrictions do not restrict the payment of dividends from retained earnings or net income.

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COMMON SHARES

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

COMMON SHARES

COMMON SHARES

The following table sets forth the Eversource parent common shares and the shares of common stock of CL&P, NSTAR Electric and PSNH that were authorized and issued, as well as the respective per share par values:  

	Shares
	Par Value		Authorized as of December 31, 2022 and 2021	Issued as of December 31,
				2022	2021
Eversource	$	5	380,000,000	359,984,073	357,818,402
CL&P	$	10	24,500,000	6,035,205	6,035,205
NSTAR Electric	$	1	100,000,000	200	200
PSNH	$	1	100,000,000	301	301

Common Share Issuances and 2022 Equity Distribution Agreement: On May 11, 2022, Eversource entered into an equity distribution agreement pursuant to which it may offer and sell up to $1.2 billion of its common shares from time to time through an “at-the-market” (ATM) equity offering program. Eversource may issue and sell its common shares through its sales agents during the term of this agreement. Shares may be offered in transactions on the New York Stock Exchange, in the over-the-counter market, through negotiated transactions or otherwise. Sales may be made at either market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. In 2022, Eversource issued 2,165,671 common shares, which resulted in proceeds of $197.1 million, net of issuance costs. Eversource used the net proceeds received for general corporate purposes.

Treasury Shares: As of December 31, 2022 and 2021, there were 11,540,218 and 13,415,206 Eversource common shares held as treasury shares, respectively.  As of December 31, 2022 and 2021, there were 348,443,855 and 344,403,196 Eversource common shares outstanding, respectively.

Acquisition of The Torrington Water Company: On October 3, 2022, Aquarion acquired The Torrington Water Company (TWC) following the receipt of all required approvals. The acquisition was structured as a stock-for-stock exchange, and Eversource issued 925,264 treasury shares at closing for a purchase price of $72.1 million.

Acquisition of New England Service Company: On December 1, 2021, Aquarion acquired New England Service Company (NESC), pursuant to a definitive agreement entered into on April 8, 2021. The acquisition was structured as a stock-for-stock merger and Eversource issued 462,517 treasury shares at closing for a purchase price of $38.1 million.

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. Eversource also issued treasury shares for its December 2021 and October 2022 water business acquisitions. 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.

COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTSDividends on the preferred stock of CL&P and NSTAR Electric totaled $7.5 million for each of the years ended December 31, 2022, 2021 and 2020.  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 December 31, 2022 and 2021.  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. For the years ended December 31, 2022, 2021 and 2020, there was no change in ownership of the common equity of CL&P and NSTAR Electric.

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PREFERRED STOCK NOT SUBJECT TO MANDATORY REDEMPTION

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

PREFERRED STOCK NOT SUBJECT TO MANDATORY REDEMPTION

PREFERRED STOCK NOT SUBJECT TO MANDATORY REDEMPTIONThe CL&P and NSTAR Electric preferred stock is not subject to mandatory redemption and is presented as a noncontrolling interest of a subsidiary in Eversource's financial statements.

CL&P is authorized to issue up to 9,000,000 shares of preferred stock, par value $50 per share, and NSTAR Electric is authorized to issue 2,890,000 shares of preferred stock, par value $100 per share. Holders of preferred stock of CL&P and NSTAR Electric are entitled to receive cumulative dividends in preference to any payment of dividends on the common stock. Upon liquidation, holders of preferred stock of CL&P and NSTAR Electric are entitled to receive a liquidation preference before any distribution to holders of common stock in an amount equal to the par value of the preferred stock plus accrued and unpaid dividends. If the net assets were to be insufficient to pay the liquidation preference in full, then the net assets would be distributed ratably to all holders of preferred stock. The preferred stock of CL&P and NSTAR Electric is subject to optional redemption by the CL&P and NSTAR Electric Boards of Directors at any time.

Details of preferred stock not subject to mandatory redemption are as follows (in millions, except in redemption price and shares):

		Redemption Price Per Share		Shares Outstanding as of December 31,		As of December 31,
Series				2022	2021	2022		2021
CL&P
$1.90	Series of 1947	$	52.50	163,912	163,912	$	8.2	$	8.2
$2.00	Series of 1947	$	54.00	336,088	336,088	16.8		16.8
$2.04	Series of 1949	$	52.00	100,000	100,000	5.0		5.0
$2.20	Series of 1949	$	52.50	200,000	200,000	10.0		10.0
3.90%	Series of 1949	$	50.50	160,000	160,000	8.0		8.0
$2.06	Series E of 1954	$	51.00	200,000	200,000	10.0		10.0
$2.09	Series F of 1955	$	51.00	100,000	100,000	5.0		5.0
4.50%	Series of 1956	$	50.75	104,000	104,000	5.2		5.2
4.96%	Series of 1958	$	50.50	100,000	100,000	5.0		5.0
4.50%	Series of 1963	$	50.50	160,000	160,000	8.0		8.0
5.28%	Series of 1967	$	51.43	200,000	200,000	10.0		10.0
$3.24	Series G of 1968	$	51.84	300,000	300,000	15.0		15.0
6.56%	Series of 1968	$	51.44	200,000	200,000	10.0		10.0
Total CL&P				2,324,000	2,324,000	$	116.2	$	116.2
NSTAR Electric
4.25%	Series of 1956	$	103.625	180,000	180,000	$	18.0	$	18.0
4.78%	Series of 1958	$	102.80	250,000	250,000	25.0		25.0
Total NSTAR Electric				430,000	430,000	$	43.0	$	43.0
Fair Value Adjustment due to Merger with NSTAR						(3.6)		(3.6)
Other
6.00%	Series of 1958	$	100.00	23	23	$	—	$	—
Total Eversource - Noncontrolling Interest - Preferred Stock of Subsidiaries						$	155.6	$	155.6

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COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS

COMMON SHARES

The following table sets forth the Eversource parent common shares and the shares of common stock of CL&P, NSTAR Electric and PSNH that were authorized and issued, as well as the respective per share par values:  

	Shares
	Par Value		Authorized as of December 31, 2022 and 2021	Issued as of December 31,
				2022	2021
Eversource	$	5	380,000,000	359,984,073	357,818,402
CL&P	$	10	24,500,000	6,035,205	6,035,205
NSTAR Electric	$	1	100,000,000	200	200
PSNH	$	1	100,000,000	301	301

Common Share Issuances and 2022 Equity Distribution Agreement: On May 11, 2022, Eversource entered into an equity distribution agreement pursuant to which it may offer and sell up to $1.2 billion of its common shares from time to time through an “at-the-market” (ATM) equity offering program. Eversource may issue and sell its common shares through its sales agents during the term of this agreement. Shares may be offered in transactions on the New York Stock Exchange, in the over-the-counter market, through negotiated transactions or otherwise. Sales may be made at either market prices prevailing at the time of sale, at prices related to such prevailing market prices or at negotiated prices. In 2022, Eversource issued 2,165,671 common shares, which resulted in proceeds of $197.1 million, net of issuance costs. Eversource used the net proceeds received for general corporate purposes.

Treasury Shares: As of December 31, 2022 and 2021, there were 11,540,218 and 13,415,206 Eversource common shares held as treasury shares, respectively.  As of December 31, 2022 and 2021, there were 348,443,855 and 344,403,196 Eversource common shares outstanding, respectively.

Acquisition of The Torrington Water Company: On October 3, 2022, Aquarion acquired The Torrington Water Company (TWC) following the receipt of all required approvals. The acquisition was structured as a stock-for-stock exchange, and Eversource issued 925,264 treasury shares at closing for a purchase price of $72.1 million.

Acquisition of New England Service Company: On December 1, 2021, Aquarion acquired New England Service Company (NESC), pursuant to a definitive agreement entered into on April 8, 2021. The acquisition was structured as a stock-for-stock merger and Eversource issued 462,517 treasury shares at closing for a purchase price of $38.1 million.

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. Eversource also issued treasury shares for its December 2021 and October 2022 water business acquisitions. 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.

COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTSDividends on the preferred stock of CL&P and NSTAR Electric totaled $7.5 million for each of the years ended December 31, 2022, 2021 and 2020.  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 December 31, 2022 and 2021.  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. For the years ended December 31, 2022, 2021 and 2020, there was no change in ownership of the common equity of CL&P and NSTAR Electric.

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REVENUES

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

REVENUES

REVENUES

Revenue is recognized when promised goods or services (referred to as performance obligations) are transferred to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. A five-step model is used for recognizing and measuring revenue from contracts with customers, which includes identifying the contract with the customer, identifying the performance obligations promised within the contract, determining the transaction price (the amount of consideration to which the company expects to be entitled), allocating the transaction price to the performance obligations and recognizing revenue when (or as) the performance obligation is satisfied.

The following tables present operating revenues disaggregated by revenue source:

	For the Year Ended December 31, 2022
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	4,796.1	$	1,204.9	$	—	$	141.7	$	—	$	—	$	6,142.7
Commercial	2,903.3		648.5		—		66.5		—		(4.1)		3,614.2
Industrial	374.9		199.7		—		4.7		—		(20.1)		559.2
Total Retail Tariff Sales Revenues	8,074.3		2,053.1		—		212.9		—		(24.2)		10,316.1
Wholesale Transmission Revenues	—		—		1,700.5		—		—		(1,264.5)		436.0
Wholesale Market Sales Revenues	1,190.9		140.8		—		3.8		—		—		1,335.5
Other Revenues from Contracts with Customers	72.3		5.6		14.1		8.4		1,435.5		(1,425.3)		110.6
Amortization of/(Reserve for) Revenues    Subject to Refund	72.0		—		0.7		(0.7)		—		—		72.0
Total Revenues from Contracts with Customers	9,409.5		2,199.5		1,715.3		224.4		1,435.5		(2,714.0)		12,270.2
Alternative Revenue Programs	(15.4)		14.8		92.7		(2.5)		—		(84.3)		5.3
Other Revenues	11.2		1.3		0.7		0.6		—		—		13.8
Total Operating Revenues	$	9,405.3	$	2,215.6	$	1,808.7	$	222.5	$	1,435.5	$	(2,798.3)	$	12,289.3

	For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	3,989.8	$	1,000.3	$	—	$	133.5	$	—	$	—	$	5,123.6
Commercial	2,486.1		497.6		—		62.8		—		(5.1)		3,041.4
Industrial	345.3		167.2		—		4.3		—		(17.1)		499.7
Total Retail Tariff Sales Revenues	6,821.2		1,665.1		—		200.6		—		(22.2)		8,664.7
Wholesale Transmission Revenues	—		—		1,751.3		—		86.6		(1,384.7)		453.2
Wholesale Market Sales Revenues	575.8		82.1		—		3.9		—		—		661.8
Other Revenues from Contracts with Customers	78.1		5.1		13.6		7.5		1,267.4		(1,257.7)		114.0
Reserve for Revenues Subject to Refund	(71.1)		—		(5.0)		(2.6)		—		—		(78.7)
Total Revenues from Contracts with Customers	7,404.0		1,752.3		1,759.9		209.4		1,354.0		(2,664.6)		9,815.0
Alternative Revenue Programs	14.7		37.0		(126.1)		1.5		—		114.6		41.7
Other Revenues	4.9		0.3		0.8		0.4		—		—		6.4
Total Operating Revenues	$	7,423.6	$	1,789.6	$	1,634.6	$	211.3	$	1,354.0	$	(2,550.0)	$	9,863.1

	For the Year Ended December 31, 2020
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	3,951.5	$	644.9	$	—	$	145.1	$	—	$	—	$	4,741.5
Commercial	2,353.4		361.9		—		62.4		—		(4.8)		2,772.9
Industrial	327.1		107.4		—		4.8		—		(13.7)		425.6
Total Retail Tariff Sales Revenues	6,632.0		1,114.2		—		212.3		—		(18.5)		7,940.0
Wholesale Transmission Revenues	—		—		1,557.3		—		74.2		(1,290.6)		340.9
Wholesale Market Sales Revenues	327.3		43.0		—		3.8		—		—		374.1
Other Revenues from Contracts with Customers	79.3		5.7		13.3		3.5		1,161.7		(1,152.0)		111.5
Total Revenues from Contracts with Customers	7,038.6		1,162.9		1,570.6		219.6		1,235.9		(2,461.1)		8,766.5
Alternative Revenue Programs	88.1		44.7		(35.2)		(4.7)		—		37.1		130.0
Other Revenues	5.6		1.1		0.7		0.5		—		—		7.9
Total Operating Revenues	$	7,132.3	$	1,208.7	$	1,536.1	$	215.4	$	1,235.9	$	(2,424.0)	$	8,904.4

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	2,397.2	$	1,601.8	$	797.1	$	1,994.2	$	1,375.8	$	619.8	$	2,011.1	$	1,365.8	$	574.6
Commercial	1,067.9		1,457.4		380.8		890.6		1,265.0		332.2		878.3		1,176.8		299.9
Industrial	146.4		135.8		92.7		131.4		119.1		94.8		137.5		106.4		83.2
Total Retail Tariff Sales Revenues	3,611.5		3,195.0		1,270.6		3,016.2		2,759.9		1,046.8		3,026.9		2,649.0		957.7
Wholesale Transmission Revenues	755.1		670.4		275.0		863.3		616.3		271.7		754.8		576.5		226.0
Wholesale Market Sales Revenues	873.7		215.0		102.2		408.8		109.2		57.8		230.1		58.4		38.8
Other Revenues from Contracts    with Customers	30.2		46.9		11.8		26.7		56.2		11.3		32.9		43.6		14.2
Amortization of/(Reserve for) Revenues    Subject to Refund	72.7		—		—		(76.1)		—		—		—		—		4.6
Total Revenues from Contracts    with Customers	5,343.2		4,127.3		1,659.6		4,238.9		3,541.6		1,387.6		4,044.7		3,327.5		1,241.3
Alternative Revenue Programs	56.5		0.7		20.1		(78.9)		(15.1)		(17.4)		(4.2)		54.5		2.6
Other Revenues	1.8		7.2		2.9		0.4		3.4		1.9		2.2		3.5		0.6
Eliminations	(583.8)		(552.1)		(207.8)		(523.0)		(473.5)		(194.9)		(495.2)		(444.4)		(165.4)
Total Operating Revenues	$	4,817.7	$	3,583.1	$	1,474.8	$	3,637.4	$	3,056.4	$	1,177.2	$	3,547.5	$	2,941.1	$	1,079.1

Retail Tariff Sales: Regulated utilities provide products and services to their regulated customers under rates, pricing, payment terms and conditions of service, regulated by each state regulatory agency. The arrangement whereby a utility provides commodity service to a customer for a price approved by the respective state regulatory commission is referred to as a tariff sale contract, and the tariff governs all aspects of the provision of regulated services by utilities. The majority of revenue for Eversource, CL&P, NSTAR Electric and PSNH is derived from regulated retail tariff sales for the sale and distribution of electricity, natural gas and water to residential, commercial and industrial retail customers.

The utility's performance obligation for the regulated tariff sales is to provide electricity, natural gas or water to the customer as demanded. The promise to provide the commodity represents a single performance obligation, as it is a promise to transfer a series of distinct goods or services that are substantially the same and that have the same pattern of transfer to the customer. Revenue is recognized over time as the customer simultaneously receives and consumes the benefits provided by the utility, and the utility satisfies its performance obligation. Revenue is recognized based on the output method as there is a directly observable output to the customer (electricity, natural gas or water units delivered to the customer and immediately consumed). Each Eversource utility is entitled to be compensated for performance completed to date (service taken by the customer) until service is terminated.

In regulated tariff sales, the transaction prices are the rates approved by the respective state regulatory commissions.  In general, rates can only be changed through formal proceedings with the state regulatory commissions. These rates are designed to recover the costs to provide service to customers and include a return on investment. Regulatory commission-approved tracking mechanisms are included in these rates and are also used to recover, on a fully-reconciling basis, certain costs, such as the procurement of energy supply, retail transmission charges, energy efficiency program costs, net metering for distributed generation, and restructuring and stranded costs, among others. These tracking mechanisms result in rates being changed periodically to ensure recovery of actual costs incurred and the refund of any overcollection of costs.

Customers may elect to purchase electricity from each Eversource electric utility or may contract separately with a competitive third party supplier. Revenue is not recorded for the sale of the electricity commodity to customers who have contracted separately with these suppliers, only the delivery to a customer, as the utility is acting as an agent on behalf of the third party supplier.

Wholesale Transmission Revenues:  The Eversource electric transmission-owning companies (CL&P, NSTAR Electric and PSNH) each own and maintain transmission facilities that are part of an interstate power transmission grid over which electricity is transmitted throughout New England. CL&P, NSTAR Electric and PSNH, as well as most other New England utilities, are parties to a series of agreements that provide for coordinated planning and operation of the region's transmission facilities and the rules by which they acquire transmission services.  The Eversource electric transmission-owning companies have a combination of FERC-approved regional and local formula rates that work in tandem to recover all their transmission costs. These rates are part of the ISO-NE Tariff. Regional rates recover the costs of higher voltage transmission facilities that benefit the region and are collected from all New England transmission customers, including the Eversource distribution businesses. Eversource's local rates recover the costs of transmission facilities that do not provide a benefit to the region, and are collected from Eversource's distribution businesses and other transmission customers. The distribution businesses of Eversource, in turn, recover the FERC approved charges from retail customers through annual tracking mechanisms, which are retail tariff sales.

The utility's performance obligation for regulated wholesale transmission sales is to provide transmission services to the customer as demanded. The promise to provide transmission service represents a single performance obligation. The transaction prices are the transmission rate formulas as defined by the ISO-NE Tariff and are regulated and established by FERC. Wholesale transmission revenue is recognized over time as the performance obligation is completed, which occurs as transmission services are provided to customers. The revenue is recognized based on the output method. Each Eversource utility is entitled to be compensated for performance completed to date (e.g., use of the transmission system by the customer).

Wholesale Market Sales Revenues: Wholesale market sales transactions include sales of energy and energy-related products into the ISO-NE wholesale electricity market, sales of natural gas to third party marketers, and also the sale of RECs to various counterparties. ISO-NE oversees the region's wholesale electricity market and administers the transactions and terms and conditions, including payment terms, which are established in the ISO-NE tariff, between the buyers and sellers in the market. Pricing is set by the wholesale market. The wholesale transactions in the ISO-NE market occur on a day-ahead basis or a real-time basis (daily) and are, therefore, short-term. Transactions are tracked and reported by ISO-NE net by the hour, which is the net hourly position of energy sales and purchases by each market participant. The performance obligation for ISO-NE energy transactions is defined to be the net by hour transaction. Revenue is recognized when the performance obligation for these energy sales transactions is satisfied, which is when the sale occurs and the energy is transferred to the customer. For sales of natural gas, transportation, and natural gas pipeline capacity to third party marketers, revenue is recognized when the performance obligation is satisfied at the point in time the sale occurs and the natural gas or related product is transferred to the marketer. RECs are sold to various counterparties, and revenue is recognized when the performance obligation is satisfied upon transfer of title to the customer through the New England Power Pool Generation Information System. Wholesale transactions also include the sale of CL&P’s, NSTAR Electric’s and PSNH’s transmission rights associated with their proportionate equity ownership share in the transmission lines of the Hydro-Québec system in Canada.

Other Revenues from Contracts with Customers: Other revenues from contracts with customers primarily include property rentals that are not deemed leases. These revenues are generally recognized on a straight-line basis over time as the service is provided to the customer. Other revenues also include revenues from Eversource's service company, which is eliminated in consolidation.

Amortization of/(Reserve for) Revenues Subject to Refund: A reserve is recorded as a reduction to revenues when future refunds to customers are deemed probable. The reserve is reversed as refunds are provided to customers in rates. Amortization of Revenues Subject to Refund within the Electric Distribution segment in 2022 represents the reversal of a 2021 reserve at CL&P established to provide bill credits to customers as a result of the settlement agreement on October 1, 2021 and a storm performance penalty assessed by PURA. The reserve was reversed as customer credits were distributed to CL&P’s customers in retail electric rates. Total customer credits as a result of the 2021 settlement and civil penalty of $93.4 million were recorded as a reserve for revenues subject to refund within current regulatory liabilities and reflected as a reduction to Operating Revenues on the 2021 income statement. The settlement amount of $65 million was refunded over a two-month billing period from December 1, 2021 to January 31, 2022 and the civil penalty of $28.4 million was refunded over a one year billing period, which began September 1, 2021.

The Connecticut water business continues to record a regulatory liability and reduction to revenues to reflect the difference between the 35 percent federal corporate income tax rate included in base distribution rates charged to customers and the 21 percent federal corporate income tax rate currently effective. This reserve will continue until base distribution rates are updated to reflect the lower federal tax rate.

Alternative Revenue Programs: In accordance with accounting guidance for rate-regulated operations, certain of Eversource's utilities' rate making mechanisms qualify as alternative revenue programs (ARPs) if they meet specified criteria, in which case revenues may be recognized prior to billing based on allowed levels of collection in rates. Eversource's utility companies recognize revenue and record a regulatory asset or liability once the condition or event allowing for the automatic adjustment of future rates occurs. ARP revenues include both the recognition of the deferral adjustment to ARP revenues, when the regulator-specified condition or event allowing for additional billing or refund has occurred, and an equal and offsetting reversal of the ARP deferral to revenues as those amounts are reflected in the price of service in subsequent periods.

Eversource’s ARPs include the revenue decoupling mechanism, the annual reconciliation adjustment to transmission formula rates, and certain capital tracker mechanisms. Certain Eversource electric, natural gas and water companies, including CL&P and NSTAR Electric, have revenue decoupling mechanisms approved by a regulatory commission (decoupled companies). Decoupled companies’ distribution revenues are not directly based on sales volumes. The decoupled companies reconcile their annual base distribution rate recovery to pre-established levels of baseline distribution delivery service revenues, with any difference between the allowed level of distribution revenue and the actual amount realized adjusted through subsequent rates. The transmission formula rates provide for the annual reconciliation and recovery or refund of estimated costs to actual costs.  The financial impacts of differences between actual and estimated costs are deferred for future recovery from, or refund to, transmission customers.  This transmission deferral reconciles billed transmission revenues to the revenue requirement for our transmission businesses.

Other Revenues: Other Revenues include certain fees charged to customers that are not considered revenue from contracts with customers. Other revenues also include lease revenues under lessor accounting guidance of $4.0 million ($0.8 million at CL&P and $2.5 million at NSTAR Electric), $4.8 million ($0.8 million at CL&P and $3.1 million at NSTAR Electric), and $4.3 million, ($0.8 million at CL&P and $2.7 million at NSTAR Electric) for the years ended December 31, 2022, 2021 and 2020, respectively.

Intercompany Eliminations: Intercompany eliminations are primarily related to the Eversource electric transmission revenues that are derived from ISO-NE regional transmission charges to the distribution businesses of CL&P, NSTAR Electric and PSNH that recover the costs of the wholesale transmission business, and revenues from Eversource's service company. Intercompany revenues and expenses between the Eversource wholesale transmission businesses and the Eversource distribution businesses and from Eversource's service company are eliminated in consolidation and included in "Eliminations" in the tables above.

Receivables: Receivables, Net on the balance sheet primarily includes trade receivables from retail customers and customers related to wholesale transmission contracts, wholesale market sales, sales of RECs, and property rentals. In general, retail tariff customers and wholesale transmission customers are billed monthly and the payment terms are generally due and payable upon receipt of the bill.

Unbilled Revenues: Unbilled Revenues on the balance sheet represent estimated amounts due from retail customers for electricity, natural gas or water delivered to customers but not yet billed. The utility company has satisfied its performance obligation and the customer has received and consumed the commodity as of the balance sheet date, and therefore, the utility company records revenue for those services in the period the services were provided. Only the passage of time is required before the company is entitled to payment for the satisfaction of the performance obligation. Payment from customers is due monthly as services are rendered and amounts are billed. Actual amounts billed to customers when meter readings become available may vary from the estimated amount.

Unbilled revenues are recognized by allocating estimated unbilled sales volumes to the respective customer classes, and then applying an estimated rate by customer class to those sales volumes. Unbilled revenue estimates reflect seasonality, weather, customer usage patterns, customer rates in effect for customer classes, and the timing of customer billing. The companies that have a decoupling mechanism record a regulatory deferral to reflect the actual allowed amount of revenue associated with their respective decoupled distribution rate design.

Practical Expedients: Eversource has elected practical expedients in the accounting guidance that allow the company to record revenue in the amount that the company has a right to invoice, if that amount corresponds directly with the value to the customer of the company's performance to date, and not to disclose related unsatisfied performance obligations. Retail and wholesale transmission tariff sales fall into this category, as these sales are recognized as revenue in the period the utility provides the service and completes the performance obligation, which is the same as the monthly amount billed to customers. There are no other material revenue streams for which Eversource has unsatisfied performance obligations.

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EARNINGS PER SHARE

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

EARNINGS PER SHARE

EARNINGS PER SHARE

Basic EPS is computed based upon the weighted average number of common shares outstanding during each period.  Diluted EPS is computed on the basis of the weighted average number of common shares outstanding plus the potential dilutive effect of certain share-based compensation awards and the equity forward sale agreement, as if they were converted into outstanding common shares.  The dilutive effect of unvested RSU and performance share awards, as well as the equity forward sale agreement, 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.  

Earnings per share dilution related to the equity forward sale agreement was determined under the treasury stock method until settlement of the forward sale agreement. Under this method, the number of Eversource common shares used in calculating diluted EPS was deemed to be increased by the excess, if any, of the number of shares that would be issued upon physical settlement of the forward sale agreement less the number of shares that would be purchased by Eversource in the market (based on the average market price during the same reporting period) using the proceeds receivable upon settlement (based on the adjusted forward sale price at the end of that reporting period). Share dilution occurred when the average market price of Eversource's common shares was higher than the adjusted forward sale price. Eversource physically settled all remaining shares under the forward sale agreement as of March 26, 2020.

For the years ended December 31, 2022 and 2021, there were no antidilutive share awards excluded from the computation. For the year ended December 31, 2020, 39,560 antidilutive share awards were excluded from the EPS computation, as their impact would have been antidilutive. Antidilutive shares pertained to a purchase option extended to underwriters in connection with Eversource's June 2020 common share issuance.

The following table sets forth the components of basic and diluted EPS:

Eversource (Millions of Dollars, except share information)	For the Years Ended December 31,
	2022		2021		2020
Net Income Attributable to Common Shareholders	$	1,404.9	$	1,220.5	$	1,205.2
Weighted Average Common Shares Outstanding:
Basic	346,783,444		343,972,926		338,836,147
Dilutive Effect of:
Share-Based Compensation Awards and Other	463,324		658,130		738,994
Equity Forward Sale Agreement	—		—		271,921
Total Dilutive Effect	463,324		658,130		1,010,915
Diluted	347,246,768		344,631,056		339,847,062
Basic EPS	$	4.05	$	3.55	$	3.56
Diluted EPS	$	4.05	$	3.54	$	3.55

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SEGMENT INFORMATION

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

SEGMENT INFORMATION

SEGMENT INFORMATION

Eversource is organized into the Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution reportable segments and Other based on a combination of factors, including the characteristics of each segments' services, the sources of operating revenues and expenses and the regulatory environment in which each segment operates.  These reportable segments represent substantially all of Eversource's total consolidated revenues.  Revenues from the sale of electricity, natural gas and water primarily are derived from residential, commercial and industrial customers and are not dependent on any single customer.  The Electric Distribution reportable segment includes the results of NSTAR Electric's solar power facilities. Eversource's reportable segments are determined based upon the level at which Eversource's chief operating decision maker assesses performance and makes decisions about the allocation of company resources.  

The remainder of Eversource's operations is presented as Other in the tables below and primarily consists of 1) the equity in earnings of Eversource parent from its subsidiaries and intercompany interest income, both of which are eliminated in consolidation, and interest expense related to the debt of Eversource parent, 2) the revenues and expenses of Eversource Service, most of which are eliminated in consolidation, 3) the operations of CYAPC and YAEC, 4) the results of other unregulated subsidiaries, which are not part of its core business, and 5) Eversource parent's equity ownership interests that are not consolidated, which primarily include the offshore wind business, a natural gas pipeline owned by Enbridge, Inc., and a renewable energy investment fund.

In the ordinary course of business, Yankee Gas, NSTAR Gas and EGMA purchase natural gas transmission services from the Enbridge, Inc. natural gas pipeline project described above. These affiliate transaction costs total $77.7 million annually and are classified as Purchased Power, 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 Year Ended December 31, 2022
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	9,405.3	$	2,215.6	$	1,808.7	$	222.5	$	1,435.5	$	(2,798.3)	$	12,289.3
Depreciation and Amortization	(970.4)		(157.6)		(337.4)		(50.9)		(132.6)		5.8		(1,643.1)
Other Operating Expenses	(7,663.7)		(1,727.0)		(548.4)		(111.8)		(1,189.1)		2,792.0		(8,448.0)
Operating Income	771.2		331.0		922.9		59.8		113.8		(0.5)		2,198.2
Interest Expense	(253.1)		(71.4)		(145.5)		(34.7)		(247.8)		74.2		(678.3)
Interest Income	45.1		10.2		0.5		—		66.3		(71.6)		50.5
Other Income, Net	180.4		33.6		37.9		8.5		1,600.8		(1,565.6)		295.6
Income Tax (Expense)/Benefit	(146.2)		(69.2)		(216.3)		3.2		(25.1)		—		(453.6)
Net Income	597.4		234.2		599.5		36.8		1,508.0		(1,563.5)		1,412.4
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	592.8	$	234.2	$	596.6	$	36.8	$	1,508.0	$	(1,563.5)	$	1,404.9
Total Assets (as of)	$	27,365.0	$	8,084.9	$	13,369.5	$	2,783.8	$	26,365.2	$	(24,737.5)	$	53,230.9
Cash Flows Used for Investments in Plant	$	1,172.6	$	710.3	$	1,144.0	$	154.4	$	260.6	$	—	$	3,441.9

	For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	7,423.6	$	1,789.6	$	1,634.6	$	211.3	$	1,354.0	$	(2,550.0)	$	9,863.1
Depreciation and Amortization	(737.8)		(142.3)		(300.3)		(46.1)		(113.1)		4.6		(1,335.0)
Other Operating Expenses	(5,970.0)		(1,345.4)		(496.2)		(101.4)		(1,170.4)		2,548.6		(6,534.8)
Operating Income	715.8		301.9		838.1		63.8		70.5		3.2		1,993.3
Interest Expense	(236.4)		(58.6)		(133.2)		(32.0)		(168.8)		46.6		(582.4)
Interest Income	20.7		4.5		2.2		—		46.0		(47.8)		25.6
Other Income, Net	78.1		17.9		19.8		3.3		1,363.9		(1,347.3)		135.7
Income Tax (Expense)/Benefit	(103.5)		(60.9)		(179.4)		1.7		(2.1)		—		(344.2)
Net Income	474.7		204.8		547.5		36.8		1,309.5		(1,345.3)		1,228.0
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	470.1	$	204.8	$	544.6	$	36.8	$	1,309.5	$	(1,345.3)	$	1,220.5
Total Assets (as of)	$	25,411.2	$	7,215.9	$	12,377.8	$	2,551.1	$	22,674.7	$	(21,738.6)	$	48,492.1
Cash Flows Used for Investments in Plant	$	1,053.3	$	721.1	$	1,024.1	$	137.2	$	239.4	$	—	$	3,175.1

	For the Year Ended December 31, 2020
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	7,132.3	$	1,208.7	$	1,536.1	$	215.4	$	1,235.9	$	(2,424.0)	$	8,904.4
Depreciation and Amortization	(657.0)		(87.9)		(278.1)		(44.2)		(93.5)		1.6		(1,159.1)
Other Operating Expenses	(5,642.3)		(913.8)		(470.0)		(86.6)		(1,071.9)		2,428.0		(5,756.6)
Operating Income	833.0		207.0		788.0		84.6		70.5		5.6		1,988.7
Interest Expense	(216.0)		(40.0)		(126.8)		(32.9)		(161.0)		38.3		(538.4)
Interest Income	3.2		0.9		4.7		—		37.8		(41.8)		4.8
Other Income, Net	58.0		3.1		23.3		2.0		1,382.9		(1,365.5)		103.8
Income Tax (Expense)/Benefit	(129.6)		(36.9)		(183.8)		(12.5)		16.6		—		(346.2)
Net Income	548.6		134.1		505.4		41.2		1,346.8		(1,363.4)		1,212.7
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	544.0	$	134.1	$	502.5	$	41.2	$	1,346.8	$	(1,363.4)	$	1,205.2
Cash Flows Used for Investments in Plant	$	1,079.0	$	494.4	$	1,004.6	$	118.8	$	246.2	$	—	$	2,943.0

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ACQUISITION OF ASSETS OF COLUMBIA GAS OF MASSACHUSETTS

12 Months Ended

Dec. 31, 2022

Business Combination and Asset Acquisition [Abstract]

ACQUISITION OF ASSETS OF COLUMBIA GAS OF MASSACHUSETTS

ACQUISITION OF ASSETS OF COLUMBIA GAS OF MASSACHUSETTS

On October 9, 2020, Eversource acquired certain assets and liabilities that comprised the NiSource Inc. (NiSource) natural gas distribution business in Massachusetts, which was previously doing business as Columbia Gas of Massachusetts (CMA), pursuant to an asset purchase agreement (the Agreement) entered into on February 26, 2020 between Eversource and NiSource. The cash purchase price was $1.1 billion, plus a working capital amount of $68.6 million, as finalized in 2021. Eversource financed the acquisition through a combination of debt and equity issuances in a ratio that was consistent with its consolidated capital structure.

Pro Forma Financial Information: The following unaudited pro forma financial information reflects the pro forma combined results of operations of Eversource and the CMA business acquired and reflects the amortization of purchase price adjustments assuming the acquisition had taken place on January 1, 2019. The unaudited pro forma financial information has been presented for illustrative purposes only and is not necessarily indicative of the consolidated results of operations that would have been achieved or the future consolidated results of operations of Eversource. Pro forma net income excludes the impact of assets and liabilities not assumed by Eversource and non-recurring costs associated with the transaction.

(Pro forma amounts in millions, except share amounts)	For the Year Ended December 31, 2020
Operating Revenues	$	9,273
Net Income Attributable to Common Shareholders	1,265
Basic EPS	3.73
Diluted EPS	3.72

Revenues and Net Income: The impact of CMA on Eversource's accompanying consolidated statement of income included operating revenues of $154.8 million and net income attributable to common shareholders of $13.9 million for the year ended December 31, 2020.

Transactions recognized separately from the business combination: Eversource entered into Transition Services Agreements (TSAs) with NiSource, under which NiSource provided certain administrative functions. The TSAs were completed in 2022. Eversource recorded $7.9 million and $21.4 million in Operating Expenses on the statements of income related to TSA costs for the years ended December 31, 2022 and 2021, respectively, and $15.9 million of TSA and pre-TSA costs in Operating Expenses in 2020. In addition, Eversource recorded $2.0 million in Energy Efficiency expense related to the implementation of new energy efficiency programs as specified in a DPU-approved rate settlement agreement in the fourth quarter of 2020.

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GOODWILL

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL

GOODWILL

In a business combination, the excess of the purchase price over the estimated fair values of the assets acquired and liabilities assumed

is recognized as goodwill. The following table presents Eversource’s goodwill by reportable segment:

(Millions of Dollars)	Electric Distribution		Electric Transmission		Natural Gas Distribution		Water Distribution		Total
Balance as of January 1, 2021	$	2,543.6	$	576.8	$	441.4	$	884.2	$	4,446.0
CMA Measurement Period Adjustments	—		—		9.6		—		9.6
Acquisition of NESC	—		—		—		21.7		21.7
Balance as of December 31, 2021	$	2,543.6	$	576.8	$	451.0	$	905.9	$	4,477.3
NESC Measurement Period Adjustments	—		—		—		0.5		0.5
Acquisition of TWC	—		—		—		44.8		44.8
Balance as of December 31, 2022	$	2,543.6	$	576.8	$	451.0	$	951.2	$	4,522.6

Eversource completed the acquisition of TWC on October 3, 2022, resulting in the addition of $44.8 million of goodwill, all of which was allocated to the Water Distribution reporting unit. Eversource completed the acquisition of NESC on December 1, 2021, resulting in the addition of $22.2 million of goodwill, which included measurement period increases in 2022 totaling $0.5 million. The goodwill was allocated to the Water Distribution reporting unit. Eversource completed the CMA asset acquisition on October 9, 2020, resulting in the addition of $51.9 million of goodwill, which included measurement period adjustments in 2021 resulting in an additional $9.6 million of goodwill. The goodwill was allocated to the Natural Gas Distribution reporting unit. For further information on the acquisitions of TWC and NESC, see Note 18, “Common Shares,” to the financial statements.

Goodwill is evaluated for impairment at least annually and more frequently if indicators of impairment arise. In accordance with the accounting standards, if the fair value of a reporting unit is less than its carrying value (including goodwill), the goodwill is tested for impairment. Goodwill is not subject to amortization, however is subject to a fair value based assessment for impairment at least annually and whenever facts or circumstances indicate that there may be an impairment.  A resulting write-down, if any, would be charged to Operating Expenses.   

In assessing goodwill for impairment, an entity is permitted to first assess qualitatively whether it is more likely than not that goodwill impairment exists as of the annual impairment test date. A quantitative impairment test is required only if it is concluded that it is more likely than not that a reporting unit’s fair value is less than it’s carrying amount. The annual goodwill assessment included a qualitative evaluation of multiple factors that impact the fair value of the reporting units, including general, macroeconomic and market conditions, and entity-specific assumptions that affect the future cash flows of the reporting units. Key considerations include discount rates, utility sector market performance and merger transaction multiples, the Company's share price and credit ratings, analyst reports, financial performance, cost and risk factors, internal estimates and projections of future cash flows and net income, long-term strategy, the timing and outcome of rate cases, and recent regulatory and legislative proceedings.

Eversource's reporting units for the purpose of testing goodwill are Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution. These reporting units are consistent with the operating segments underlying the reportable segments identified in Note 23, "Segment Information," to the financial statements.

Eversource completed its annual goodwill impairment assessment for the Electric Distribution, Electric Transmission, Natural Gas Distribution and Water Distribution reporting units as of October 1, 2022 and determined that no impairment existed. There were no events subsequent to October 1, 2022 that indicated impairment of goodwill.

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SCHEDULE I - FINANCIAL INFORMATION OF REGISTRANT

12 Months Ended

Dec. 31, 2022

Condensed Financial Information Disclosure [Abstract]

SCHEDULE I - FINANCIAL INFORMATION OF REGISTRANT

SCHEDULE I

EVERSOURCE ENERGY (PARENT)

FINANCIAL INFORMATION OF REGISTRANT

BALANCE SHEETS

AS OF DECEMBER 31, 2022 AND 2021

(Thousands of Dollars)

	2022		2021
ASSETS
Current Assets:
Cash	$	971	$	175
Accounts Receivable from Subsidiaries	53,338		43,403
Notes Receivable from Subsidiaries	1,074,800		1,245,900
Prepayments and Other Current Assets	23,597		11,974
Total Current Assets	1,152,706		1,301,452
Deferred Debits and Other Assets:
Investments in Subsidiary Companies, at Equity	18,379,840		16,108,190
Notes Receivable from Subsidiaries	1,896,500		1,001,000
Accumulated Deferred Income Taxes	—		17,409
Goodwill	3,852,524		3,852,524
Other Long-Term Assets	108,867		101,710
Total Deferred Debits and Other Assets	24,237,731		21,080,833
Total Assets	$	25,390,437	$	22,382,285
LIABILITIES AND CAPITALIZATION
Current Liabilities:
Notes Payable	$	1,442,200	$	1,342,950
Long-Term Debt - Current Portion	1,207,047		767,681
Accounts Payable to Subsidiaries	33,530		37,609
Other Current Liabilities	112,807		87,745
Total Current Liabilities	2,795,584		2,235,985
Deferred Credits and Other Liabilities:
Accumulated Deferred Income Taxes	8,498		—
Other Long-Term Liabilities	140,393		150,616
Total Deferred Credits and Other Liabilities	148,891		150,616
Long-Term Debt	6,972,804		5,395,840
Common Shareholders' Equity:
Common Shares	1,799,920		1,789,092
Capital Surplus, Paid in	8,401,731		8,098,514
Retained Earnings	5,527,153		5,005,391
Accumulated Other Comprehensive Loss	(39,421)		(42,275)
Treasury Stock	(216,225)		(250,878)
Common Shareholders' Equity	15,473,158		14,599,844
Total Liabilities and Capitalization	$	25,390,437	$	22,382,285

See the Combined Notes to Financial Statements in this Annual Report on Form 10-K for a description of significant accounting matters related to Eversource parent, including Eversource common shares information as described in Note 18, "Common Shares," material obligations and guarantees as described in Note 13, "Commitments and Contingencies," and debt agreements as described in Note 8, "Short-Term Debt," and Note 9, "Long-Term Debt."

SCHEDULE I

EVERSOURCE ENERGY (PARENT)

FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF INCOME

FOR THE YEARS ENDED DECEMBER 31, 2022, 2021 AND 2020

(Thousands of Dollars, Except Share Information)

	2022		2021		2020
Operating Revenues	$	—	$	—	$	—
Operating Expenses:
Other	26,708		43,048		28,645
Operating Loss	(26,708)		(43,048)		(28,645)
Interest Expense	237,773		163,613		160,887
Other Income, Net:
Equity in Earnings of Subsidiaries	1,565,474		1,345,199		1,309,630
Other, Net	79,383		47,802		38,546
Other Income, Net	1,644,857		1,393,001		1,348,176
Income Before Income Tax Benefit	1,380,376		1,186,340		1,158,644
Income Tax Benefit	(24,499)		(34,187)		(46,523)
Net Income	$	1,404,875	$	1,220,527	$	1,205,167
Basic Earnings per Common Share	$	4.05	$	3.55	$	3.56
Diluted Earnings per Common Share	$	4.05	$	3.54	$	3.55
Weighted Average Common Shares Outstanding:
Basic	346,783,444		343,972,926		338,836,147
Diluted	347,246,768		344,631,056		339,847,062

STATEMENTS OF COMPREHENSIVE INCOME

(Thousands of Dollars)	2022		2021		2020
Net Income	$	1,404,875	$	1,220,527	$	1,205,167
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	20		972		1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)		(671)		342
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	4,470		33,835		(13,290)
Other Comprehensive Income/(Loss), Net of Tax	2,854		34,136		(11,352)
Comprehensive Income	$	1,407,729	$	1,254,663	$	1,193,815

See the Combined Notes to Financial Statements in this Annual Report on Form 10-K for a description of significant accounting matters related to Eversource parent, including Eversource common shares information as described in Note 18, "Common Shares," material obligations and guarantees as described in Note 13, "Commitments and Contingencies," and debt agreements as described in Note 8, "Short-Term Debt," and Note 9, "Long-Term Debt."

SCHEDULE I

EVERSOURCE ENERGY (PARENT)

FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF CASH FLOWS

FOR THE YEARS ENDED DECEMBER 31, 2022, 2021 and 2020

(Thousands of Dollars)

	2022		2021		2020
Operating Activities:
Net Income	$	1,404,875	$	1,220,527	$	1,205,167
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Equity in Earnings of Subsidiaries	(1,565,474)		(1,345,199)		(1,309,630)
Cash Dividends Received from Subsidiaries	855,600		1,037,100		485,800
Deferred Income Taxes	25,823		20,293		(4,667)
Other	26,455		36,910		39,940
Changes in Current Assets and Liabilities:
Accounts Receivables from Subsidiaries	(9,935)		(3,758)		(14,575)
Taxes Receivable/Accrued, Net	(21,627)		(19,455)		35,300
Accounts Payable to Subsidiaries	(4,079)		19,185		14,091
Other Current Assets and Liabilities, Net	35,090		8,144		21,284
Net Cash Flows Provided by Operating Activities	746,728		973,747		472,710
Investing Activities:
Capital Contributions to Subsidiaries	(1,499,300)		(1,033,000)		(1,899,340)
Return of Capital from Subsidiaries	12,000		178,800		80,000
Increase in Notes Receivable from Subsidiaries	(724,400)		(140,200)		(264,300)
Other Investing Activities	(1,289)		(3,196)		(367)
Net Cash Flows Used in Investing Activities	(2,212,989)		(997,596)		(2,084,007)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	197,058		—		928,992
Cash Dividends on Common Shares	(860,033)		(805,439)		(744,665)
Issuance of Long-Term Debt	2,800,000		1,000,000		1,550,000
Retirement of Long-Term Debt	(750,000)		(450,000)		—
Increase/(Decrease) in Notes Payable	99,250		288,625		(170,545)
Other Financing Activities	(19,193)		(9,545)		46,480
Net Cash Flows Provided by Financing Activities	1,467,082		23,641		1,610,262
Net Increase/(Decrease) in Cash and Restricted Cash	821		(208)		(1,035)
Cash and Restricted Cash - Beginning of Year	226		434		1,469
Cash and Restricted Cash - End of Year	$	1,047	$	226	$	434
Supplemental Cash Flow Information:
Cash Paid/(Received) During the Year for:
Interest	$	215,053	$	164,568	$	140,694
Income Taxes	$	(20,992)	$	(51,277)	$	(43,158)

See the Combined Notes to Financial Statements in this Annual Report on Form 10-K for a description of significant accounting matters related to Eversource parent, including Eversource common shares information as described in Note 18, "Common Shares," material obligations and guarantees as described in Note 13, "Commitments and Contingencies," and debt agreements as described in Note 8, "Short-Term Debt," and Note 9, "Long-Term Debt."

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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

12 Months Ended

Dec. 31, 2022

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

SCHEDULE II

EVERSOURCE ENERGY AND SUBSIDIARIES

VALUATION AND QUALIFYING ACCOUNTS AND RESERVES

FOR THE YEARS ENDED DECEMBER 31, 2022, 2021 AND 2020

(Thousands of Dollars)

Column A		Column B		Column C				Column D		Column E
				Additions
				(1)		(2)
Description:		Balance as of Beginning of Year		Charged to Costs and Expenses		Charged to Other Accounts - Describe (a)		Deductions -Describe (b)		Balance as of End of Year
Eversource:
Reserves Deducted from Assets -
Reserves for Uncollectible Accounts:
	2022	$	417,406	$	61,876	$	112,533	$	105,518	$	486,297
	2021	358,851		60,886		110,572		112,903		417,406
	2020	224,821		53,461		145,005		64,436		358,851
CL&P:
Reserves Deducted from Assets -
Reserves for Uncollectible Accounts:
	2022	$	181,319	$	15,578	$	59,485	$	31,062	$	225,320
	2021	157,447		13,495		57,779		47,402		181,319
	2020	97,348		12,882		71,223		24,006		157,447
NSTAR Electric:
Reserves Deducted from Assets -
Reserves for Uncollectible Accounts:
	2022	$	97,005	$	21,550	$	12,412	$	36,009	$	94,958
	2021	91,583		16,649		20,064		31,291		97,005
	2020	75,406		15,293		23,424		22,540		91,583
PSNH:
Reserves Deducted from Assets -
Reserves for Uncollectible Accounts:
	2022	$	24,331	$	9,211	$	2,539	$	6,845	$	29,236
	2021	17,157		13,113		3,135		9,074		24,331
	2020	10,497		5,164		7,692		6,196		17,157

(a)    Amounts relate to uncollectible accounts receivables reserved for that are not charged to bad debt expense. CL&P, NSTAR Electric, NSTAR Gas, EGMA and Yankee Gas are allowed to recover in rates, amounts associated with certain uncollectible hardship accounts receivable. CL&P, NSTAR Electric, PSNH, NSTAR Gas and EGMA are also allowed to recover uncollectible energy supply costs through regulatory tracking mechanisms. Amounts in this column in 2020 also include a $24.2 million increase due to the CMA asset acquisition on October 9, 2020 at Eversource, and an increase due to the adoption of the credit loss accounting standard in 2020 of $23.8 million at Eversource, $22.2 million at CL&P, $0.3 million at PSNH, and a decrease of $1.3 million at NSTAR Electric.

(b)    Amounts written off, net of recoveries.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The 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 consolidated financial statements of Eversource, NSTAR Electric and PSNH and the financial statements of CL&P are herein collectively referred to as the "financial statements."  

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.

CYAPC and YAEC are inactive regional nuclear power companies engaged in the long-term storage of their spent nuclear fuel. Eversource consolidates the operations of CYAPC and YAEC because CL&P's, NSTAR Electric's and PSNH's combined ownership and voting interests in each of these entities is greater than 50 percent.  Intercompany transactions between CL&P, NSTAR Electric, PSNH and the CYAPC and YAEC companies have been eliminated in consolidation of the Eversource financial statements.  

Eversource holds several equity ownership interests that are not consolidated and are accounted for under the equity method.

In accordance with accounting guidance on noncontrolling interests in consolidated financial statements, the Preferred Stock of CL&P and the Preferred Stock of NSTAR Electric, which are not owned by Eversource or its consolidated subsidiaries and are not subject to mandatory redemption, have been presented as noncontrolling interests in the financial statements of Eversource.  The Preferred Stock of CL&P and the Preferred Stock of NSTAR Electric are considered to be temporary equity and have been classified between liabilities and permanent shareholders' equity on the balance sheets of Eversource, CL&P and NSTAR Electric due to a provision in the preferred stock agreements of both CL&P and NSTAR Electric that grant preferred stockholders the right to elect a majority of the CL&P and NSTAR Electric Boards of Directors, respectively, should certain conditions exist, such as if preferred dividends are in arrears for a specified amount of time.  The Net Income reported in the statements of income and cash flows represents net income prior to apportionment to noncontrolling interests, which is represented by dividends on preferred stock of CL&P and NSTAR Electric.

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.

Cash and Cash Equivalents

Cash and Cash EquivalentsCash includes cash on hand. At the end of each reporting period, any overdraft amounts are reclassified from Cash to Accounts Payable on the balance sheets. Cash Equivalents include short-term cash investments that are highly liquid in nature and have original maturities of three months or less.

Provision 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, which was implemented on January 1, 2020 (ASU 2016-13), 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 being offered to customers, reasonable forecasts, and expectations of future collectability and collection efforts. Management continuously assesses the collectability of receivables and adjusts estimates based on actual experience and future expectations based on economic conditions, collection efforts and other factors. Management also monitors the aging analysis of receivables to determine if there are changes in the collections of accounts receivable. Receivable balances are written off against the allowance for uncollectible accounts when the customer accounts are no longer in service and these balances are deemed to be uncollectible. Management concluded that the reserve balance as of December 31, 2022 adequately reflected the collection risk and net realizable value for its receivables.

As of December 31, 2022 and 2021, the total amount incurred as a result of COVID-19 included in the allowance for uncollectible accounts was $50.9 million and $55.3 million at Eversource, $16.0 million and $23.9 million at CL&P, and $4.1 million and $9.0 million at NSTAR Electric, respectively. At our Connecticut and Massachusetts utilities, the COVID-19 related uncollectible amounts were deferred either as incremental regulatory costs or deferred through existing regulatory tracking mechanisms that recover uncollectible energy supply costs, as management believes it is probable that these costs will ultimately be recovered from customers in future rates. No COVID-19 related uncollectible amounts were deferred at PSNH as a result of a July 2021 NHPUC order. Based on the status of our COVID-19 regulatory dockets, policies and practices in the jurisdictions in which we operate, we believe the state regulatory commissions in Connecticut and Massachusetts will allow us to recover our incremental uncollectible customer receivable costs associated with COVID-19.

The PURA allows CL&P and Yankee Gas to accelerate the recovery of accounts receivable balances attributable to qualified customers under financial or medical duress (uncollectible hardship accounts receivable) outstanding for greater than 180 days and 90 days, respectively.  The DPU allows NSTAR Electric, NSTAR Gas and EGMA to recover in rates amounts associated with certain uncollectible hardship accounts receivable. These uncollectible hardship customer account balances are included in Regulatory Assets or Other Long-Term Assets on the balance sheets. Hardship customers are protected from shut-off in certain circumstances, and historical collection experience has reflected a higher default risk as compared to the rest of the receivable population. Management uses a higher credit risk profile for this pool of trade receivables as compared to non-hardship receivables. The allowance for uncollectible hardship accounts is included in the total uncollectible allowance balance.

Transfer of Energy Efficiency Loans

Transfer of Energy Efficiency LoansCL&P transferred a portion of its energy efficiency customer loan portfolio to outside lenders in order to make additional loans to customers.  CL&P remains the servicer of the loans and will transmit customer payments to the lenders, with a maximum amount outstanding under this program of $55 million.  The amounts of the loans are included in Accounts Receivable, Net and Other Long-Term Assets, and are offset by Other Current Liabilities and Other Long-Term Liabilities on CL&P’s balance sheet.

Materials, Supplies, Natural Gas and REC Inventory

Materials, Supplies, Natural Gas and REC InventoryMaterials, Supplies, Natural Gas and REC Inventory include materials and supplies purchased primarily for construction or operation and maintenance purposes, natural gas purchased for delivery to customers, and RECs.  Inventory is valued at the lower of cost or net realizable value. RECs are purchased from suppliers of renewable sources of generation and are used to meet state mandated Renewable Portfolio Standards requirements.

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.

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," Note 6, "Investments in Unconsolidated Affiliates," Note 7, "Asset Retirement Obligations," Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," Note 15, "Fair Value of Financial Instruments," and Note 25, “Goodwill,” to the financial statements.

Derivative Accounting

Derivative Accounting

Many of the electric and natural gas companies' contracts for the purchase and sale of energy or energy-related products are derivatives.  The accounting treatment for energy contracts entered into varies and depends on the intended use of the particular contract and on whether or not the contract is a derivative.  

The application of derivative accounting is complex and requires management judgment in the following respects: identification of derivatives and embedded derivatives, election and designation of a contract as normal, and determination of the fair value of derivative contracts.  All of these judgments can have a significant impact on the financial statements.  The judgment applied in the election of a contract as normal (and resulting accrual accounting) includes the conclusion that it is probable at the inception of the contract and throughout its term that it will result in physical delivery of the underlying product and that the quantities will be used or sold by the business in the normal course of business.  If facts and circumstances change and management can no longer support this conclusion, then a contract cannot be considered normal, accrual accounting is terminated, and fair value accounting is applied prospectively.  

The fair value of derivative contracts is based upon the contract terms and conditions and the underlying market price or fair value per unit.  When quantities are not specified in the contract, the Company determines whether the contract has a determinable quantity by using amounts referenced in default provisions and other relevant sections of the contract.  The fair value of derivative assets and liabilities with the same counterparty are offset and recorded as a net derivative asset or liability on the balance sheets.  

Regulatory assets or regulatory liabilities are recorded to offset the fair values of these derivative contracts related to energy and energy-related products, as contract settlements are recovered from, or refunded to, customers in future rates. All changes in the fair value of these derivative contracts are recorded as regulatory assets or liabilities and do not impact net income.

Allowance for Funds Used During Construction

Allowance for Funds Used During ConstructionAFUDC represents the cost of borrowed and equity funds used to finance construction and is included in the cost of the electric, natural gas and water companies' utility plant on the balance sheet.  The portion of AFUDC attributable to borrowed funds is recorded as a reduction of Interest Expense, and the AFUDC related to equity funds is recorded as Other Income, Net on the statements of income.  AFUDC costs are recovered from customers over the service life of the related plant in the form of increased revenue collected as a result of higher depreciation expense. The average AFUDC rate is based on a FERC-prescribed formula using the cost of a company's short-term financings and capitalization (preferred stock, long-term debt and common equity), as appropriate.  The average rate is applied to average eligible CWIP amounts to calculate AFUDC.

Other Taxes

Other TaxesEversource's companies that serve customers in Connecticut collect gross receipts taxes levied by the state of Connecticut from their customers. 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.

Related Parties

Related Parties

Eversource Service, Eversource's service company, provides centralized accounting, administrative, engineering, financial, information technology, legal, operational, planning, purchasing, tax, and other services to Eversource's companies.  The Rocky River Realty Company and Properties, Inc., two other Eversource subsidiaries, construct, acquire or lease some of the property and facilities used by Eversource's companies.

As of both December 31, 2022 and 2021, CL&P, NSTAR Electric and PSNH had long-term receivables from Eversource Service in the amounts of $25.0 million, $5.5 million and $3.8 million, respectively, which were included in Other Long-Term Assets on the balance sheets. These amounts related to the funding of investments held in trust by Eversource Service in connection with certain postretirement benefits for CL&P, NSTAR Electric and PSNH employees and have been eliminated in consolidation on the Eversource financial statements.  

Included in the CL&P, NSTAR Electric and PSNH balance sheets as of December 31, 2022 and 2021 were Accounts Receivable from Affiliated Companies and Accounts Payable to Affiliated Companies relating to transactions between CL&P, NSTAR Electric and PSNH and other subsidiaries that are wholly-owned by Eversource.  These amounts have been eliminated in consolidation on the Eversource financial statements.

The Eversource Energy Foundation is an independent not-for-profit charitable entity and is not included in the consolidated financial statements of Eversource as the Company does not have title to, and cannot receive contributions back from, the Eversource Energy Foundation's assets. Eversource made contributions to the Eversource Energy Foundation of $8.0 million in 2022 and $6.4 million in 2020 and did not make any contributions in 2021.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Provision for Uncollectible Accounts

The activity in the allowance for uncollectible accounts by portfolio segment is as follows:

	Eversource						CL&P						NSTAR Electric						PSNH
(Millions of Dollars)	Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Hardship Accounts		Retail (Non-Hardship), Wholesale, and Other		Total Allowance		Total Allowance
Balance as of January 1, 2020	$	143.3	$	81.5	$	224.8	$	80.1	$	17.2	$	97.3	$	43.9	$	31.5	$	75.4	$	10.5
ASU 2016-13 Implementation    Impact on January 1, 2020	21.6		2.2		23.8		21.3		0.9		22.2		(1.6)		0.3		(1.3)		0.3
Increase due to CMA acquisition	—		24.2		24.2		—		—		—		—		—		—		—
Uncollectible Expense	—		53.5		53.5		—		12.9		12.9		—		15.3		15.3		5.2
Uncollectible Costs Deferred (1)	43.1		53.9		97.0		38.2		10.8		49.0		(1.7)		26.4		24.7		7.4
Write-Offs	(14.7)		(63.3)		(78.0)		(11.9)		(17.8)		(29.7)		(0.9)		(26.3)		(27.2)		(6.9)
Recoveries Collected	1.5		12.1		13.6		1.4		4.3		5.7		—		4.7		4.7		0.7
Balance as of December 31, 2020	$	194.8	$	164.1	$	358.9	$	129.1	$	28.3	$	157.4	$	39.7	$	51.9	$	91.6	$	17.2
Uncollectible Expense	—		60.9		60.9		—		13.5		13.5		—		16.6		16.6		13.1
Uncollectible Costs Deferred (1)	51.9		58.7		110.6		32.3		25.5		57.8		4.3		15.8		20.1		3.1
Write-Offs	(22.0)		(107.7)		(129.7)		(18.0)		(36.2)		(54.2)		(0.7)		(36.3)		(37.0)		(10.0)
Recoveries Collected	1.4		15.3		16.7		1.2		5.6		6.8		—		5.7		5.7		0.9
Balance as of December 31, 2021	$	226.1	$	191.3	$	417.4	$	144.6	$	36.7	$	181.3	$	43.3	$	53.7	$	97.0	$	24.3
Uncollectible Expense	—		61.9		61.9		—		15.6		15.6		—		21.6		21.6		9.2
Uncollectible Costs Deferred (1)	77.8		34.7		112.5		58.3		1.2		59.5		1.5		10.9		12.4		2.5
Write-Offs	(21.3)		(102.7)		(124.0)		(15.3)		(23.0)		(38.3)		(1.1)		(41.2)		(42.3)		(7.7)
Recoveries Collected	1.8		16.7		18.5		1.3		5.9		7.2		—		6.3		6.3		0.9
Balance as of December 31, 2022	$	284.4	$	201.9	$	486.3	$	188.9	$	36.4	$	225.3	$	43.7	$	51.3	$	95.0	$	29.2

(1)    These expected credit losses are deferred as regulatory costs on the balance sheets, as these amounts are ultimately recovered in rates. Amounts include uncollectible costs for hardship accounts and other customer receivables, including uncollectible amounts related to uncollectible energy supply costs and COVID-19. The increase in the allowance for uncollectible hardship accounts in 2022 at Eversource and CL&P primarily relates to increased customer enrollment in disconnection prevention programs in Connecticut.

Schedule of Utility Inventory

The carrying amounts of materials and supplies, natural gas inventory, and RECs, which are included in Current Assets on the balance sheets, were as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Materials and Supplies	$	221.0	$	88.2	$	81.0	$	34.4	$	148.9	$	60.3	$	55.0	$	25.2
Natural Gas	95.9		—		—		—		56.2		—		—		—
RECs	57.5		—		57.4		0.1		62.4		—		61.7		0.7
Total	$	374.4	$	88.2	$	138.4	$	34.5	$	267.5	$	60.3	$	116.7	$	25.9

Costs Related to Fuel and Natural Gas

The cost of natural gas included in Purchased Power, Purchased Natural Gas and Transmission on the statements of income were as follows:

	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Eversource - Cost of Natural Gas	$	1,010.2	$	718.6	$	464.2

Weighted-Average AFUDC Rates

AFUDC costs and the weighted-average AFUDC rates were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars, except percentages)	2022			2021			2020
Borrowed Funds	$	21.8		$	18.4		$	23.7
Equity Funds	47.3			37.3			42.0
Total AFUDC	$	69.1		$	55.7		$	65.7
Average AFUDC Rate	4.7		%	4.2		%	5.0		%

	For the Years Ended December 31,
	2022									2021									2020
(Millions of Dollars, except percentages)	CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH
Borrowed Funds	$	4.8		$	10.7		$	1.4		$	2.9		$	9.0		$	0.8		$	6.6		$	9.1		$	2.1
Equity Funds	13.6			24.6			2.5			7.7			20.4			1.6			13.8			21.5			4.2
Total AFUDC	$	18.4		$	35.3		$	3.9		$	10.6		$	29.4		$	2.4		$	20.4		$	30.6		$	6.3
Average AFUDC Rate	6.6		%	5.4		%	2.6		%	5.0		%	4.9		%	2.5		%	5.9		%	5.7		%	4.7		%

Components of Other Income, Net

The components of Other Income, Net on the statements of income were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Pension, SERP and PBOP Non-Service Income Components,   Net of Deferred Portion (1)	$	219.8	$	84.4	$	44.4
AFUDC Equity	47.3		37.3		42.0
Equity in Earnings of Unconsolidated Affiliates (2)	22.9		14.2		14.2
Investment Income/(Loss)	1.9		(0.2)		1.1
Interest Income	50.5		25.6		4.8
Gain on Sale of Property	2.6		0.1		1.8
Other	1.1		(0.1)		0.3
Total Other Income, Net	$	346.1	$	161.3	$	108.6

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion (1)	$	64.4	$	85.5	$	26.8	$	15.2	$	40.2	$	10.3	$	3.8	$	29.3	$	7.0
AFUDC Equity	13.6		24.6		2.5		7.7		20.4		1.6		13.8		21.5		4.2
Investment (Loss)/Income	(1.3)		1.2		0.2		1.3		0.1		0.1		1.1		(0.8)		0.1
Interest Income	6.5		30.7		3.1		5.9		13.4		2.4		2.0		0.9		2.4
Other	0.1		0.7		0.1		0.1		0.7		0.2		0.1		1.1		0.1
Total Other Income, Net	$	83.3	$	142.7	$	32.7	$	30.2	$	74.8	$	14.6	$	20.8	$	52.0	$	13.8

(1)    See Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," for the components of net periodic benefit income/expense for the Pension, SERP and PBOP Plans. The non-service related components of pension, SERP and PBOP benefit income/expense, after capitalization or deferral, are presented as non-operating income and recorded in Other Income, Net on the statements of income.

(2)    Equity in earnings of unconsolidated affiliates includes $12.2 million and $2.1 million of pre-tax unrealized gains for the years ended December 31, 2022 and 2021, respectively, and $2.4 million of primarily realized gains for the year ended December 31, 2020, associated with an equity method investment in a renewable energy fund. Equity in earnings of unconsolidated affiliates for the year ended December 31, 2020 includes an other-than-temporary impairment of $2.8 million related to a write-off of an investment within a renewable energy fund. See Note 6, "Investments in Unconsolidated Affiliates," for Eversource’s equity method investments.

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 Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Eversource	$	194.7	$	181.9	$	170.6
CL&P	166.1		158.1		149.9

Supplemental Cash Flow Information

Eversource (Millions of Dollars)	As of and For the Years Ended December 31,
	2022		2021		2020
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	$	636.2	$	568.7	$	518.0
Income Taxes	77.9		121.6		48.9
Non-Cash Investing Activities:
Plant Additions Included in Accounts Payable (As of)	586.9		467.9		367.2

	As of and For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	$	167.2	$	152.8	$	58.3	$	161.5	$	141.6	$	56.5	$	149.0	$	129.4	$	54.5
Income Taxes	117.6		23.8		58.3		38.4		74.2		51.1		10.9		110.7		34.2
Non-Cash Investing Activities:
Plant Additions Included in Accounts   Payable (As of)	131.8		184.3		76.2		110.6		120.0		68.7		101.8		103.2		33.3

Cash and Cash Equivalents as Reported on the Balance Sheet

	As of December 31,
	2022								2021
(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	$	374.6	$	11.3	$	327.7	$	0.1	$	66.8	$	55.8	$	0.7	$	—
Restricted cash included in:
Special Deposits	102.2		8.8		17.5		33.1		78.2		18.7		17.4		31.4
Marketable Securities	25.4		0.2		0.1		0.4		31.3		0.3		0.1		0.5
Other Long-Term Assets	19.6		—		—		3.2		44.7		—		—		3.2
Cash, Cash Equivalents and Restricted Cash     as reported on the Statements of Cash Flows	$	521.8	$	20.3	$	345.3	$	36.8	$	221.0	$	74.8	$	18.2	$	35.1

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REGULATORY ACCOUNTING (Tables)

12 Months Ended

Dec. 31, 2022

Regulated Operations [Abstract]

Components of Regulatory Assets

The components of regulatory assets were as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Benefit Costs	$	921.7	$	156.7	$	299.5	$	56.6	$	1,481.0	$	272.4	$	395.5	$	118.9
Storm Costs, Net	1,379.1		799.3		484.4		95.4		1,102.7		695.6		341.3		65.8
Regulatory Tracking Mechanisms	1,075.3		216.8		391.5		73.7		1,050.5		333.6		376.6		85.4
Income Taxes, Net	853.3		491.1		115.6		16.0		790.7		470.5		112.6		17.5
Securitized Stranded Costs	435.7		—		—		435.7		478.9		—		—		478.9
Goodwill-related	281.0		—		241.2		—		297.8		—		255.7		—
Derivative Liabilities	181.8		181.8		—		—		249.2		249.2		—		—
Asset Retirement Obligations	127.9		35.9		68.2		4.4		115.0		33.6		59.8		4.1
Other Regulatory Assets	322.5		26.2		114.0		14.4		150.0		29.9		37.7		15.8
Total Regulatory Assets	5,578.3		1,907.8		1,714.4		696.2		5,715.8		2,084.8		1,579.2		786.4
Less:  Current Portion	1,335.5		314.1		492.8		102.2		1,129.1		371.6		444.0		107.2
Total Long-Term Regulatory Assets	$	4,242.8	$	1,593.7	$	1,221.6	$	594.0	$	4,586.7	$	1,713.2	$	1,135.2	$	679.2

Components of Regulatory Liabilities

The components of regulatory liabilities were as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
EDIT due to Tax Cuts and Jobs Act of 2017	$	2,619.3	$	983.6	$	944.3	$	348.6	$	2,685.2	$	996.1	$	984.5	$	359.2
Cost of Removal	670.6		130.8		405.3		14.7		649.6		100.1		381.0		17.2
Regulatory Tracking Mechanisms	890.8		361.0		336.1		155.0		448.4		182.0		185.1		107.0
Deferred Portion of Non-Service Income    Components of Pension, SERP and PBOP	270.9		34.5		139.7		28.8		148.3		12.0		90.7		14.9
Benefit Costs	55.4		0.7		31.4		—		133.5		—		107.4		—
AFUDC - Transmission	98.2		48.2		50.0		—		81.0		43.2		37.8		—
CL&P Settlement Agreement and Storm    Performance Penalty	—		—		—		—		81.3		81.3		—		—
Other Regulatory Liabilities	215.9		40.6		14.5		6.5		241.4		45.1		0.8		3.3
Total Regulatory Liabilities	4,821.1		1,599.4		1,921.3		553.6		4,468.7		1,459.8		1,787.3		501.6
Less:  Current Portion	890.8		336.0		373.2		162.0		602.4		266.5		228.2		120.2
Total Long-Term Regulatory Liabilities	$	3,930.3	$	1,263.4	$	1,548.1	$	391.6	$	3,866.3	$	1,193.3	$	1,559.1	$	381.4

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PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION (Tables)

12 Months Ended

Dec. 31, 2022

Property, Plant and Equipment [Abstract]

Schedule of Utility Property, Plant and Equipment

The following tables summarize property, plant and equipment by asset category:

Eversource	As of December 31,
(Millions of Dollars)	2022		2021
Distribution - Electric	$	18,326.2	$	17,679.1
Distribution - Natural Gas	7,443.8		6,694.8
Transmission - Electric	13,709.3		12,882.4
Distribution - Water	2,112.6		1,900.9
Solar	200.8		200.9
Utility	41,792.7		39,358.1
Other (1)	1,738.1		1,469.5
Property, Plant and Equipment, Gross	43,530.8		40,827.6
Less:  Accumulated Depreciation
Utility	(9,167.4)		(8,885.2)
Other	(706.1)		(580.1)
Total Accumulated Depreciation	(9,873.5)		(9,465.3)
Property, Plant and Equipment, Net	33,657.3		31,362.3
Construction Work in Progress	2,455.5		2,015.4
Total Property, Plant and Equipment, Net	$	36,112.8	$	33,377.7

	As of December 31,
	2022						2021
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Distribution - Electric	$	7,370.1	$	8,410.0	$	2,586.4	$	7,117.6	$	8,105.5	$	2,496.2
Transmission - Electric	6,165.1		5,333.8		2,212.0		5,859.0		5,090.5		1,934.6
Solar	—		200.8		—		—		200.9		—
Property, Plant and Equipment, Gross	13,535.2		13,944.6		4,798.4		12,976.6		13,396.9		4,430.8
Less:  Accumulated Depreciation	(2,567.1)		(3,381.2)		(912.3)		(2,572.1)		(3,227.3)		(908.4)
Property, Plant and Equipment, Net	10,968.1		10,563.4		3,886.1		10,404.5		10,169.6		3,522.4
Construction Work in Progress	498.9		1,063.6		174.1		399.0		707.0		134.1
Total Property, Plant and Equipment, Net	$	11,467.0	$	11,627.0	$	4,060.2	$	10,803.5	$	10,876.6	$	3,656.5

(1)These assets are primarily comprised of computer software, hardware and equipment at Eversource Service and buildings at The Rocky River Realty Company.

The depreciation rates for the various classes of utility property, plant and equipment aggregate to composite rates as follows:

(Percent)	2022		2021		2020
Eversource	3.0	%	3.1	%	3.0	%
CL&P	2.8	%	2.8	%	2.8	%
NSTAR Electric	2.7	%	2.8	%	2.8	%
PSNH	3.0	%	3.1	%	2.8	%

The following table summarizes average remaining useful lives of depreciable assets:

	As of December 31, 2022
(Years)	Eversource	CL&P	NSTAR Electric	PSNH
Distribution - Electric	34.2	35.0	34.6	30.8
Distribution - Natural Gas	37.4	—	—	—
Transmission - Electric	39.8	36.3	45.2	39.3
Distribution - Water	39.0	—	—	—
Solar	22.9	—	22.9	—
Other (1)	11.0	—	—	—

(1)The estimated useful life of computer software, hardware and equipment primarily ranges from 5 to 15 years and of buildings is 40 years.

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DERIVATIVE INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

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 December 31,
		2022						2021
CL&P (Millions of Dollars)	Fair Value Hierarchy	Commodity Supply and Price Risk Management		Netting (1)		Net Amount Recorded as a Derivative		Commodity Supply and Price Risk Management		Netting (1)		Net Amount Recorded as a Derivative
Current Derivative Assets	Level 3	$	16.3	$	(0.5)	$	15.8	$	14.7	$	(1.0)	$	13.7
Long-Term Derivative Assets	Level 3	28.8		(0.9)		27.9		46.9		(0.9)		46.0
Current Derivative Liabilities	Level 3	(81.6)		—		(81.6)		(73.5)		—		(73.5)
Long-Term Derivative Liabilities	Level 3	(143.9)		—		(143.9)		(235.4)		—		(235.4)

(1)     Amounts represent derivative assets and liabilities that Eversource elected to record net on the balance sheets.  These amounts are subject to master netting agreements or similar agreements for which the right of offset exists.

Fair Value Inputs, Liabilities, Quantitative Information

	As of December 31,
	2022								2021
CL&P	Range				Average			Period Covered	Range				Average			Period Covered
Forward Reserve Prices	$	0.44	—	$0.50	$	0.47	per kW-Month	2023 - 2024	$	0.50	—	$1.15	$	0.82	per kW-Month	2022 - 2024

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation

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 (Millions of Dollars)	For the Years Ended December 31,
	2022		2021
Derivatives, Net:
Fair Value as of Beginning of Period	$	(249.2)	$	(293.1)
Net Realized/Unrealized Gains/(Losses) Included in Regulatory Assets	10.1		(8.5)
Settlements	57.3		52.4
Fair Value as of End of Period	$	(181.8)	$	(249.2)

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MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The following is a summary of the available-for-sale debt securities:

	As of December 31,
	2022								2021
Eversource (Millions of Dollars)	Amortized Cost		Pre-Tax Unrealized Gains		Pre-Tax Unrealized Losses		Fair Value		Amortized Cost		Pre-Tax Unrealized Gains		Pre-Tax Unrealized Losses		Fair Value
Debt Securities	$	201.6	$	0.1	$	(16.2)	$	185.5	$	214.5	$	5.1	$	(0.2)	$	219.4

Investments Classified by Contractual Maturity Date

As of December 31, 2022, the contractual maturities of available-for-sale debt securities were as follows:    

Eversource (Millions of Dollars)	Amortized Cost		Fair Value
Less than one year (1)	$	28.5	$	28.3
One to five years	43.8		42.4
Six to ten years	35.6		32.3
Greater than ten years	93.7		82.5
Total Debt Securities	$	201.6	$	185.5

(1)     Amounts in the Less than one year category include securities in the CYAPC and YAEC spent nuclear fuel trusts, which are restricted and are classified in long-term Marketable Securities on the balance sheets.

Marketable Securities Recorded at Fair Value

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 December 31,
	2022		2021
Level 1:
Mutual Funds and Equities	$	190.1	$	254.2
Money Market Funds	25.4		31.3
Total Level 1	$	215.5	$	285.5
Level 2:
U.S. Government Issued Debt Securities (Agency and Treasury)	$	82.3	$	81.3
Corporate Debt Securities	46.1		65.3
Asset-Backed Debt Securities	8.6		12.6
Municipal Bonds	12.7		12.3
Other Fixed Income Securities	10.4		16.6
Total Level 2	$	160.1	$	188.1
Total Marketable Securities	$	375.6	$	473.6

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INVESTMENTS IN UNCONSOLIDATED AFFILIATES (Tables)

12 Months Ended

Dec. 31, 2022

Equity Method Investments and Joint Ventures [Abstract]

Summary of Investments

Eversource's investments included the following:

			Investment Balance as of December 31,
(Millions of Dollars)	Ownership Interest		2022		2021
Offshore Wind Business - North East Offshore	50	%	$	1,947.1	$	1,213.6
Natural Gas Pipeline - Algonquin Gas Transmission, LLC	15	%	118.8		121.9
Renewable Energy Investment Fund	90	%	84.1		76.5
Other	various		26.1		24.3
Total Investments in Unconsolidated Affiliates			$	2,176.1	$	1,436.3

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ASSET RETIREMENT OBLIGATIONS (Tables)

12 Months Ended

Dec. 31, 2022

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation

A reconciliation of the beginning and ending carrying amounts of ARO liabilities is as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Balance as of Beginning of Year	$	500.1	$	35.0	$	97.5	$	4.7	$	499.7	$	33.4	$	91.8	$	4.4
Liabilities Settled During the Year	(22.3)		—		—		—		(23.9)		(0.6)		—		—
Accretion	28.9		2.4		4.1		0.2		29.4		2.2		4.0		0.3
Revisions in Estimated Cash Flows	(4.0)		—		(0.3)		—		(5.1)		—		1.7		—
Balance as of End of Year	$	502.7	$	37.4	$	101.3	$	4.9	$	500.1	$	35.0	$	97.5	$	4.7

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SHORT-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Schedule of Borrowings Outstanding

The amount of borrowings outstanding and available under the commercial paper programs were as follows:

	Borrowings Outstanding  as of December 31,				Available Borrowing Capacity as of December 31,				Weighted-Average Interest Rate as of December 31,
(Millions of Dollars)	2022		2021		2022		2021		2022		2021
Eversource Parent Commercial Paper Program	$	1,442.2	$	1,343.0	$	557.8	$	657.0	4.63	%	0.31	%
NSTAR Electric Commercial Paper Program	—		162.5		650.0		487.5		—	%	0.14	%

Details of long-term debt outstanding are as follows:

CL&P (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
First Mortgage Bonds:
1994 Series D due 2024	7.875	%	$	139.8	$	139.8
2004 Series B due 2034	5.750	%	130.0		130.0
2005 Series B due 2035	5.625	%	100.0		100.0
2006 Series A due 2036	6.350	%	250.0		250.0
2007 Series B due 2037	5.750	%	150.0		150.0
2007 Series D due 2037	6.375	%	100.0		100.0
2013 Series A due 2023	2.500	%	400.0		400.0
2014 Series A due 2044	4.300	%	475.0		475.0
2015 Series A due 2045	4.150	%	350.0		350.0
2017 Series A due 2027	3.200	%	500.0		500.0
2018 Series A due 2048	4.000	%	800.0		800.0
2020 Series A due 2025	0.750	%	400.0		400.0
2021 Series A due 2031	2.050	%	425.0		425.0
Total First Mortgage Bonds			4,219.8		4,219.8
Less Amounts due Within One Year			(400.0)		—
Current Portion Classified as Long-Term Debt (1)			400.0		—
Unamortized Premiums and Discounts, Net			21.5		23.1
Unamortized Debt Issuance Costs			(24.8)		(27.5)
CL&P Long-Term Debt			$	4,216.5	$	4,215.4

NSTAR Electric (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
Debentures:
2006 Debentures due 2036	5.750	%	$	200.0	$	200.0
2010 Debentures due 2040	5.500	%	300.0		300.0
2012 Debentures due 2022	2.375	%	—		400.0
2014 Debentures due 2044	4.400	%	300.0		300.0
2015 Debentures due 2025	3.250	%	250.0		250.0
2016 Debentures due 2026	2.700	%	250.0		250.0
2017 Debentures due 2027	3.200	%	700.0		700.0
2019 Debentures due 2029	3.250	%	400.0		400.0
2020 Debentures due 2030	3.950	%	400.0		400.0
2021 Debentures due 2051	3.100	%	300.0		300.0
2021 Debentures due 2031	1.950	%	300.0		300.0
2022 Debentures due 2052	4.550	%	450.0		—
2022 Debentures due 2052	4.950	%	400.0		—
Total Debentures			4,250.0		3,800.0
Notes:
2004 Senior Notes Series B due 2034	5.900	%	50.0		50.0
2007 Senior Notes Series D due 2037	6.700	%	40.0		40.0
2013 Senior Notes Series G due 2023	3.880	%	80.0		80.0
2016 Senior Notes Series H due 2026	2.750	%	50.0		50.0
Total Notes			220.0		220.0
Less Amounts due Within One Year			(80.0)		(400.0)
Unamortized Premiums and Discounts, Net			(14.8)		(11.2)
Unamortized Debt Issuance Costs			(30.1)		(23.4)
NSTAR Electric Long-Term Debt			$	4,345.1	$	3,585.4

PSNH (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
First Mortgage Bonds:
2005 Series M due 2035	5.600	%	$	50.0	$	50.0
2013 Series S due 2023	3.500	%	325.0		325.0
2019 Series T due 2049	3.600	%	300.0		300.0
2020 Series U due 2050	2.400	%	150.0		150.0
2021 Series V due 2031	2.200	%	350.0		350.0
Total First Mortgage Bonds			1,175.0		1,175.0
Less Amounts due Within One Year			(325.0)		—
Current Portion Classified as Long-Term Debt (1)			295.3		—
Unamortized Premiums and Discounts, Net			(2.5)		(2.6)
Unamortized Debt Issuance Costs			(7.9)		(8.6)
PSNH Long-Term Debt			$	1,134.9	$	1,163.8

OTHER (Millions of Dollars)					As of December 31,
	Interest Rate				2022		2021
Yankee Gas - First Mortgage Bonds due 2024 - 2051	1.380	%	-	5.350%	$	845.0	$	765.0
NSTAR Gas - First Mortgage Bonds due 2025 - 2051	2.250	%	-	7.110%	705.0		580.0
EGMA - First Mortgage Bonds due 2031 - 2052	2.110	%	-	4.700%	650.0		550.0
Aquarion - Senior Notes due 2024	4.000%				360.0		360.0
Aquarion - Unsecured Notes due 2023 - 2052	—	%	-	6.430%	464.7		394.9
Aquarion - Secured Debt due 2023 - 2044	2.864	%	-	9.290%	34.4		39.6
Eversource Parent - Senior Notes due 2023 - 2050	0.800	%	-	4.600%	8,150.0		6,100.0
Pre-1983 Spent Nuclear Fuel Obligation (CYAPC)					11.9		11.7
Fair Value Adjustment (2)					26.2		43.8
Less Fair Value Adjustment - Current Portion (2)					(7.0)		(17.7)
Less Amounts due in One Year					(1,203.4)		(775.4)
Unamortized Premiums and Discounts, Net					40.1		43.4
Unamortized Debt Issuance Costs					(49.4)		(36.3)
Total Other Long-Term Debt					$	10,027.5	$	8,059.0
Total Eversource Long-Term Debt					$	19,724.0	$	17,023.6

(1)     As a result of the CL&P and PSNH long-term debt issuances in January 2023, $400 million and $295.3 million, respectively, of current portion of long-term debt were reclassified as Long-Term Debt on CL&P’s and PSNH’s balance sheets as of December 31, 2022.

(2)     The fair value adjustment amount is the purchase price adjustments, net of amortization, required to record long-term debt at fair value on the dates of the 2012 merger with NSTAR and the 2017 acquisition of Aquarion.

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LONG-TERM DEBT (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Schedule of Outstanding Long-Term Debt

The amount of borrowings outstanding and available under the commercial paper programs were as follows:

	Borrowings Outstanding  as of December 31,				Available Borrowing Capacity as of December 31,				Weighted-Average Interest Rate as of December 31,
(Millions of Dollars)	2022		2021		2022		2021		2022		2021
Eversource Parent Commercial Paper Program	$	1,442.2	$	1,343.0	$	557.8	$	657.0	4.63	%	0.31	%
NSTAR Electric Commercial Paper Program	—		162.5		650.0		487.5		—	%	0.14	%

Details of long-term debt outstanding are as follows:

CL&P (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
First Mortgage Bonds:
1994 Series D due 2024	7.875	%	$	139.8	$	139.8
2004 Series B due 2034	5.750	%	130.0		130.0
2005 Series B due 2035	5.625	%	100.0		100.0
2006 Series A due 2036	6.350	%	250.0		250.0
2007 Series B due 2037	5.750	%	150.0		150.0
2007 Series D due 2037	6.375	%	100.0		100.0
2013 Series A due 2023	2.500	%	400.0		400.0
2014 Series A due 2044	4.300	%	475.0		475.0
2015 Series A due 2045	4.150	%	350.0		350.0
2017 Series A due 2027	3.200	%	500.0		500.0
2018 Series A due 2048	4.000	%	800.0		800.0
2020 Series A due 2025	0.750	%	400.0		400.0
2021 Series A due 2031	2.050	%	425.0		425.0
Total First Mortgage Bonds			4,219.8		4,219.8
Less Amounts due Within One Year			(400.0)		—
Current Portion Classified as Long-Term Debt (1)			400.0		—
Unamortized Premiums and Discounts, Net			21.5		23.1
Unamortized Debt Issuance Costs			(24.8)		(27.5)
CL&P Long-Term Debt			$	4,216.5	$	4,215.4

NSTAR Electric (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
Debentures:
2006 Debentures due 2036	5.750	%	$	200.0	$	200.0
2010 Debentures due 2040	5.500	%	300.0		300.0
2012 Debentures due 2022	2.375	%	—		400.0
2014 Debentures due 2044	4.400	%	300.0		300.0
2015 Debentures due 2025	3.250	%	250.0		250.0
2016 Debentures due 2026	2.700	%	250.0		250.0
2017 Debentures due 2027	3.200	%	700.0		700.0
2019 Debentures due 2029	3.250	%	400.0		400.0
2020 Debentures due 2030	3.950	%	400.0		400.0
2021 Debentures due 2051	3.100	%	300.0		300.0
2021 Debentures due 2031	1.950	%	300.0		300.0
2022 Debentures due 2052	4.550	%	450.0		—
2022 Debentures due 2052	4.950	%	400.0		—
Total Debentures			4,250.0		3,800.0
Notes:
2004 Senior Notes Series B due 2034	5.900	%	50.0		50.0
2007 Senior Notes Series D due 2037	6.700	%	40.0		40.0
2013 Senior Notes Series G due 2023	3.880	%	80.0		80.0
2016 Senior Notes Series H due 2026	2.750	%	50.0		50.0
Total Notes			220.0		220.0
Less Amounts due Within One Year			(80.0)		(400.0)
Unamortized Premiums and Discounts, Net			(14.8)		(11.2)
Unamortized Debt Issuance Costs			(30.1)		(23.4)
NSTAR Electric Long-Term Debt			$	4,345.1	$	3,585.4

PSNH (Millions of Dollars)			As of December 31,
	Interest Rate		2022		2021
First Mortgage Bonds:
2005 Series M due 2035	5.600	%	$	50.0	$	50.0
2013 Series S due 2023	3.500	%	325.0		325.0
2019 Series T due 2049	3.600	%	300.0		300.0
2020 Series U due 2050	2.400	%	150.0		150.0
2021 Series V due 2031	2.200	%	350.0		350.0
Total First Mortgage Bonds			1,175.0		1,175.0
Less Amounts due Within One Year			(325.0)		—
Current Portion Classified as Long-Term Debt (1)			295.3		—
Unamortized Premiums and Discounts, Net			(2.5)		(2.6)
Unamortized Debt Issuance Costs			(7.9)		(8.6)
PSNH Long-Term Debt			$	1,134.9	$	1,163.8

OTHER (Millions of Dollars)					As of December 31,
	Interest Rate				2022		2021
Yankee Gas - First Mortgage Bonds due 2024 - 2051	1.380	%	-	5.350%	$	845.0	$	765.0
NSTAR Gas - First Mortgage Bonds due 2025 - 2051	2.250	%	-	7.110%	705.0		580.0
EGMA - First Mortgage Bonds due 2031 - 2052	2.110	%	-	4.700%	650.0		550.0
Aquarion - Senior Notes due 2024	4.000%				360.0		360.0
Aquarion - Unsecured Notes due 2023 - 2052	—	%	-	6.430%	464.7		394.9
Aquarion - Secured Debt due 2023 - 2044	2.864	%	-	9.290%	34.4		39.6
Eversource Parent - Senior Notes due 2023 - 2050	0.800	%	-	4.600%	8,150.0		6,100.0
Pre-1983 Spent Nuclear Fuel Obligation (CYAPC)					11.9		11.7
Fair Value Adjustment (2)					26.2		43.8
Less Fair Value Adjustment - Current Portion (2)					(7.0)		(17.7)
Less Amounts due in One Year					(1,203.4)		(775.4)
Unamortized Premiums and Discounts, Net					40.1		43.4
Unamortized Debt Issuance Costs					(49.4)		(36.3)
Total Other Long-Term Debt					$	10,027.5	$	8,059.0
Total Eversource Long-Term Debt					$	19,724.0	$	17,023.6

(1)     As a result of the CL&P and PSNH long-term debt issuances in January 2023, $400 million and $295.3 million, respectively, of current portion of long-term debt were reclassified as Long-Term Debt on CL&P’s and PSNH’s balance sheets as of December 31, 2022.

(2)     The fair value adjustment amount is the purchase price adjustments, net of amortization, required to record long-term debt at fair value on the dates of the 2012 merger with NSTAR and the 2017 acquisition of Aquarion.

Schedule of Issuance and Repayments of Long-Term Debt

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/ Repayment Information
CL&P 2023 Series A First Mortgage Bonds	5.25	%	$	500.0	January 2023	January 2053	Repaid 2013 Series A Bonds at maturity and short-term debt, and paid capital expenditures and working capital
CL&P 2013 Series A First Mortgage Bonds	2.50	%	(400.0)		January 2023	January 2023	Paid at maturity
NSTAR Electric 2022 Debentures	4.55	%	450.0		May 2022	June 2052	Repaid short-term debt, paid capital expenditures and working capital
NSTAR Electric 2022 Debentures	4.95	%	400.0		September 2022	September 2052	Refinanced investments in eligible green expenditures, which were previously financed using short-term debt from October 1, 2020 through June 30, 2022
NSTAR Electric 2012 Debentures	2.375	%	(400.0)		October 2022	October 2022	Paid at maturity
PSNH Series W First Mortgage Bonds	5.15	%	300.0		January 2023	January 2053	Repaid short-term debt, paid capital expenditures and working capital
Eversource Parent Series V Senior Notes	2.90	%	650.0		February 2022	March 2027	Repaid Series K Senior Notes at maturity and short-term debt
Eversource Parent Series W Senior Notes	3.375	%	650.0		February 2022	March 2032	Repaid Series K Senior Notes at maturity and short-term debt
Eversource Parent Series X Senior Notes	4.20	%	900.0		June 2022	June 2024	Repaid short-term debt and paid working capital
Eversource Parent Series Y Senior Notes	4.60	%	600.0		June 2022	July 2027	Repaid short-term debt and paid working capital
Eversource Parent Series K Senior Notes	2.75	%	(750.0)		March 2022	March 2022	Paid at maturity
Yankee Gas Series B First Mortgage Bonds	8.48	%	(20.0)		March 2022	March 2022	Paid at maturity
Yankee Gas Series U First Mortgage Bonds	4.31	%	100.0		September 2022	September 2032	Repaid short-term debt, paid capital expenditures and for general corporate purposes
EGMA Series C First Mortgage Bonds	4.70	%	100.0		June 2022	June 2052	Repaid short-term debt, paid capital expenditures and for general corporate purposes
NSTAR Gas Series V First Mortgage Bonds	4.40	%	125.0		July 2022	August 2032	Repaid short-term debt, paid capital expenditures and for general corporate purposes
Aquarion Water Company of New Hampshire General Mortgage Bonds	4.45	%	(5.0)		July 2022	July 2022	Paid at maturity
Aquarion Water Company of Connecticut Senior Notes	4.69	%	70.0		August 2022	September 2052	Repaid short-term debt

Schedule of Maturities of Long-Term Debt Outstanding

Long-term debt maturities on debt outstanding for the years 2023 through 2027 and thereafter are shown below. These amounts exclude PSNH rate reduction bonds, CYAPC pre-1983 spent nuclear fuel obligation, net unamortized premiums, discounts and debt issuance costs, and other fair value adjustments as of December 31, 2022:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2023	$	2,008.4	$	400.0	$	80.0	$	325.0
2024	1,950.0		139.8		—		—
2025	1,400.2		400.0		250.0		—
2026	940.2		—		300.0		—
2027	2,539.2		500.0		700.0		—
Thereafter	12,236.0		2,780.0		3,140.0		850.0
Total	$	21,074.0	$	4,219.8	$	4,470.0	$	1,175.0

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RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES (Tables)

12 Months Ended

Dec. 31, 2022

Rate Reduction Bonds and Variable Interest Entity [Abstract]

Summary of the Impact of Funding on the Balance Sheets and Income Statements

The following tables summarize the impact of PSNH Funding on PSNH's balance sheets and income statements:

(Millions of Dollars)	As of December 31,
PSNH Balance Sheets:	2022		2021
Restricted Cash - Current Portion (included in Current Assets)	$	32.4	$	31.1
Restricted Cash - Long-Term Portion (included in Other Long-Term Assets)	3.2		3.2
Securitized Stranded Cost (included in Regulatory Assets)	435.7		478.9
Other Regulatory Liabilities (included in Regulatory Liabilities)	6.0		5.4
Accrued Interest (included in Other Current Liabilities)	6.9		7.5
Rate Reduction Bonds - Current Portion	43.2		43.2
Rate Reduction Bonds - Long-Term Portion	410.5		453.7

(Millions of Dollars) PSNH Income Statements:	For the Years Ended December 31,
	2022		2021		2020
Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net)	$	43.2	$	43.2	$	43.2
Interest Expense on RRB Principal (included in Interest Expense)	17.0		18.4		19.7

Schedule Of Rate Reduction Bonds, Principal And Interest Payments

Estimated principal payments on RRBs as of December 31, 2022, is summarized annually through 2027 and thereafter as follows:

(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
PSNH	$	43.2	$	43.2	$	43.2	$	43.2	$	43.2	$	237.7	$	453.7

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EMPLOYEE BENEFITS (Tables)

12 Months Ended

Dec. 31, 2022

Postemployment Benefits [Abstract]

Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets

The following tables provide information on the plan benefit obligations, fair values of plan assets, and funded status:  

	Pension and SERP
	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Change in Benefit Obligation:
Benefit Obligation as of Beginning of Year	$	(6,729.7)	$	(1,330.9)	$	(1,448.4)	$	(721.0)	$	(7,045.3)	$	(1,477.3)	$	(1,517.9)	$	(748.7)
Service Cost	(70.1)		(18.7)		(13.8)		(6.9)		(85.8)		(23.0)		(15.8)		(8.9)
Interest Cost	(154.5)		(31.3)		(32.8)		(16.9)		(130.0)		(27.3)		(26.8)		(14.5)
Actuarial Gain	1,385.8		284.1		295.5		156.7		177.1		127.8		20.8		14.7
Benefits Paid - Pension	302.5		63.3		68.4		33.9		309.5		64.6		68.7		34.7
Benefits Paid - Lump Sum	33.0		—		14.8		1.0		34.7		—		15.6		—
Benefits Paid - SERP	12.9		0.3		0.2		0.4		10.1		0.3		0.2		0.4
Employee Transfers	—		3.2		5.7		(3.4)		—		4.0		6.8		1.3
Benefit Obligation as of End of Year	$	(5,220.1)	$	(1,030.0)	$	(1,110.4)	$	(556.2)	$	(6,729.7)	$	(1,330.9)	$	(1,448.4)	$	(721.0)
Change in Pension Plan Assets:
Fair Value of Pension Plan Assets as of   Beginning of Year	$	6,495.5	$	1,323.8	$	1,596.0	$	694.6	$	5,409.2	$	1,043.1	$	1,345.1	$	593.7
Employer Contributions	80.0		—		15.0		—		180.0		98.9		30.0		—
Actual Return on Pension Plan Assets	(433.6)		(85.3)		(103.3)		(45.1)		1,250.5		250.4		312.0		136.9
Benefits Paid - Pension	(302.5)		(63.3)		(68.4)		(33.9)		(309.5)		(64.6)		(68.7)		(34.7)
Benefits Paid - Lump Sum	(33.0)		—		(14.8)		(1.0)		(34.7)		—		(15.6)		—
Employee Transfers	—		(3.2)		(5.7)		3.4		—		(4.0)		(6.8)		(1.3)
Fair Value of Pension Plan Assets as of End of Year	$	5,806.4	$	1,172.0	$	1,418.8	$	618.0	$	6,495.5	$	1,323.8	$	1,596.0	$	694.6
Funded Status as of December 31st	$	586.3	$	142.0	$	308.4	$	61.8	$	(234.2)	$	(7.1)	$	147.6	$	(26.4)

	PBOP
	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Change in Benefit Obligation:
Benefit Obligation as of Beginning of Year	$	(884.3)	$	(165.5)	$	(238.4)	$	(92.3)	$	(993.9)	$	(178.6)	$	(260.5)	$	(109.5)
Service Cost	(11.6)		(2.0)		(2.0)		(1.1)		(13.5)		(2.3)		(2.4)		(1.2)
Interest Cost	(20.2)		(3.7)		(5.3)		(2.2)		(17.4)		(3.2)		(4.4)		(1.8)
Actuarial Gain	173.6		33.0		39.4		15.2		81.4		5.8		11.5		14.6
Benefits Paid	52.1		10.4		16.6		6.0		51.7		10.9		16.3		5.6
Employee Transfers	—		(0.1)		0.2		(0.2)		—		1.9		1.1		—
Impact of Acquisitions	(3.3)		—		—		—		7.4		—		—		—
Benefit Obligation as of End of Year	$	(693.7)	$	(127.9)	$	(189.5)	$	(74.6)	$	(884.3)	$	(165.5)	$	(238.4)	$	(92.3)
Change in Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	$	1,138.3	$	145.7	$	530.0	$	88.0	$	1,004.1	$	134.1	$	464.6	$	79.4
Actual Return on Plan Assets	(119.6)		(15.0)		(57.0)		(9.8)		183.2		24.1		84.2		14.2
Employer Contributions	3.1		—		—		—		2.3		—		—		—
Benefits Paid	(51.7)		(10.4)		(16.6)		(6.0)		(51.3)		(10.9)		(16.3)		(5.6)
Employee Transfers	—		0.3		(0.3)		0.1		—		(1.6)		(2.5)		—
Fair Value of Plan Assets as of End of Year	$	970.1	$	120.6	$	456.1	$	72.3	$	1,138.3	$	145.7	$	530.0	$	88.0
Funded Status as of December 31st	$	276.4	$	(7.3)	$	266.6	$	(2.3)	$	254.0	$	(19.8)	$	291.6	$	(4.3)

Schedule of Defined Benefit Plans

As of December 31, 2022 and 2021, the accumulated benefit obligation for the Pension and SERP Plans is as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2022	$	4,911.6	$	960.7	$	1,055.1	$	516.9
2021	6,337.3		1,241.1		1,376.1		670.3

A reconciliation of the prepaid assets and liabilities within the Eversource Pension, SERP and PBOP Plans’ funded status to the balance sheets is as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Prepaid Pension	$	756.7	$	147.9	$	310.2	$	66.4	$	—	$	0.4	$	149.8	$	—
Prepaid PBOP	288.8		—		266.6		—		272.0		—		291.6		—
Prepaid Pension and PBOP	$	1,045.5	$	147.9	$	576.8	$	66.4	$	272.0	$	0.4	$	441.4	$	—
Accrued Pension	$	3.7	$	—	$	—	$	—	$	58.1	$	—	$	—	$	20.6
Accrued SERP	166.7		5.9		1.8		4.6		176.1		7.5		2.2		5.8
Accrued PBOP	12.4		7.3		—		2.3		18.0		19.8		—		4.3
Less: Accrued SERP - current portion	(47.3)		(0.3)		(0.2)		(0.4)		(9.7)		(0.5)		(0.2)		(0.5)
Accrued Pension, SERP and PBOP	$	135.5	$	12.9	$	1.6	$	6.5	$	242.5	$	26.8	$	2.0	$	30.2

Schedule of Assumptions Used

The following actuarial assumptions were used in calculating the Pension, SERP and PBOP Plans' year end funded status:

	Pension and SERP							PBOP
	As of December 31,							As of December 31,
		2022			2021			2022	2021
Discount Rate		5.1%	—	5.2%	2.8%	—	3.0%	5.2%	2.91%	—	2.92%
Compensation/Progression Rate		3.5%	—	4.0%	3.5%	—	4.0%	N/A

The following actuarial assumptions were used to calculate Pension, SERP and PBOP expense amounts:

	Pension and SERP									PBOP
	For the Years Ended December 31,									For the Years Ended December 31,
	2022			2021			2020			2022			2021			2020
Discount Rate	2.2%	—	3.2%	1.5%	—	3.0%	2.6%	—	3.5%	2.3%	—	3.3%	1.8%	—	3.1%	2.7%	—	3.6%
Expected Long-Term Rate of Return	8.25%			8.25%			8.25%			8.25%			8.25%			8.25%
Compensation/Progression Rate	3.5%	—	4.0%	3.5%	—	4.0%	3.5%	—	4.0%	N/A			N/A			N/A

Schedule of Net Benefit Costs

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 Year Ended December 31, 2022								For the Year Ended December 31, 2022
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	70.1	$	18.7	$	13.8	$	6.9	$	11.6	$	2.0	$	2.0	$	1.1
Interest Cost	154.5		31.3		32.8		16.9		20.2		3.7		5.3		2.2
Expected Return on Plan Assets	(523.6)		(106.3)		(128.4)		(56.1)		(89.9)		(11.4)		(42.4)		(6.7)
Actuarial Loss	116.0		16.2		32.8		7.9		—		—		—		—
Prior Service Cost/(Credit)	1.4		—		0.3		—		(21.7)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Income	$	(181.6)	$	(40.1)	$	(48.7)	$	(24.4)	$	(79.8)	$	(4.6)	$	(52.1)	$	(3.0)
Intercompany Income Allocations	N/A		$	(16.0)	$	(12.4)	$	(3.6)	N/A		$	(3.7)	$	(3.6)	$	(1.2)

	Pension and SERP								PBOP
	For the Year Ended December 31, 2021								For the Year Ended December 31, 2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	85.8	$	23.0	$	15.8	$	8.9	$	13.5	$	2.3	$	2.4	$	1.2
Interest Cost	130.0		27.3		26.8		14.5		17.4		3.2		4.4		1.8
Expected Return on Plan Assets	(437.5)		(86.8)		(108.1)		(47.5)		(79.1)		(10.3)		(36.9)		(6.1)
Actuarial Loss	243.9		45.5		61.6		20.7		8.9		1.8		2.4		0.7
Prior Service Cost/(Credit)	1.4		—		0.3		—		(21.2)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Expense/(Income)	$	23.6	$	9.0	$	(3.6)	$	(3.4)	$	(60.5)	$	(1.9)	$	(44.7)	$	(2.0)
Intercompany Expense/(Income) Allocations	N/A		$	8.0	$	8.8	$	2.7	N/A		$	(1.6)	$	(1.9)	$	(0.6)

	Pension and SERP								PBOP
	For the Year Ended December 31, 2020								For the Year Ended December 31, 2020
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Service Cost	$	76.2	$	21.8	$	15.4	$	8.2	$	10.2	$	1.7	$	2.1	$	0.9
Interest Cost	177.8		37.3		38.6		19.4		24.6		4.4		6.6		2.8
Expected Return on Plan Assets	(400.3)		(79.2)		(103.0)		(44.7)		(73.6)		(9.9)		(34.0)		(5.7)
Actuarial Loss	202.0		39.2		55.2		15.6		8.4		1.1		2.5		0.8
Prior Service Cost/(Credit)	1.2		—		0.3		—		(21.2)		1.1		(17.0)		0.4
Total Net Periodic Benefit Plan Expense/(Income)	$	56.9	$	19.1	$	6.5	$	(1.5)	$	(51.6)	$	(1.6)	$	(39.8)	$	(0.8)
Intercompany Expense/(Income) Allocations	N/A		$	9.1	$	8.9	$	2.9	N/A		$	(1.1)	$	(1.4)	$	(0.5)

Schedule of Amounts Recognized in Regulatory Assets and OCI

The following is a summary of the changes in plan assets and benefit obligations recognized in Regulatory Assets and Other Comprehensive Income (OCI) as well as amounts in Regulatory Assets and OCI that were reclassified as net periodic benefit expense during the years presented:

	Pension and SERP								PBOP
	Regulatory Assets				OCI				Regulatory Assets				OCI
	For the Years Ended December 31,								For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2022		2021		2022		2021		2022		2021
Actuarial (Gains)/Losses Arising During the Year	$	(431.6)	$	(961.7)	$	4.6	$	(28.4)	$	36.8	$	(181.5)	$	(0.8)	$	(4.0)
Actuarial Losses Reclassified as Net Periodic Benefit Expense	(107.0)		(231.2)		(9.0)		(12.7)		—		(8.5)		—		(0.4)
Prior Service (Cost)/Credit Reclassified as Net Periodic   Benefit (Expense)/Income	(1.2)		(1.3)		(0.2)		(0.1)		21.8		21.1		(0.1)		0.1

The following is a summary of the remaining Regulatory Assets and Accumulated Other Comprehensive Income amounts that have not been recognized as components of net periodic benefit expense as of December 31, 2022 and 2021:

	Regulatory Assets as of December 31,				AOCI as of December 31,
(Millions of Dollars)	2022		2021		2022		2021
Pension and SERP
Actuarial Loss	$	888.7	$	1,427.3	$	61.9	$	66.3
Prior Service Cost	4.1		5.3		0.4		0.6
PBOP
Actuarial Loss	$	81.8	$	45.0	$	2.7	$	3.5
Prior Service (Credit)/Cost	(108.3)		(130.1)		0.9		1.0

Schedule of Expected Benefit Payments

The following benefit payments, which reflect expected future service, are expected to be paid by the Pension, SERP and PBOP Plans:

(Millions of Dollars)	2023		2024		2025		2026		2027		2028 - 2032
Pension and SERP	$	401.4	$	374.4	$	380.1	$	383.0	$	384.1	$	1,901.7
PBOP	57.9		57.3		56.6		55.5		54.4		253.7

Schedule of Allocation of Plan Assets

These long-term rates of return are based on the assumed rates of return for the target asset allocations as follows:

	As of December 31,
	2022				2021
	Eversource Pension Plan and PBOP Plan				Eversource Pension Plan and PBOP Plan
	Target Asset Allocation		Assumed Rate of Return		Target Asset Allocation		Assumed Rate of Return
Equity Securities:
United States	15.0	%	8.5	%	15.0	%	8.5	%
Global	10.0	%	8.75	%	10.0	%	8.75	%
Non-United States	8.0	%	8.5	%	8.0	%	8.5	%
Emerging Markets	4.0	%	10.0	%	4.0	%	10.0	%
Debt Securities:
Fixed Income	13.0	%	4.0	%	13.0	%	4.0	%
Public High Yield Fixed Income	4.0	%	6.5	%	4.0	%	6.5	%
Private Debt	13.0	%	9.0	%	13.0	%	9.0	%
Private Equity	18.0	%	12.0	%	18.0	%	12.0	%
Real Assets	15.0	%	7.5	%	15.0	%	7.5	%

The following table presents, by asset category, the Pension and PBOP Plan assets recorded at fair value on a recurring basis by the level in which they are classified within the fair value hierarchy:  

	Pension Plan
	Fair Value Measurements as of December 31,
(Millions of Dollars)	2022								2021
Asset Category:	Level 1		Level 2		Uncategorized		Total		Level 1		Level 2		Uncategorized		Total
Equity Securities	$	407.7	$	—	$	1,102.2	$	1,509.9	$	722.5	$	—	$	1,385.2	$	2,107.7
Fixed Income (1)	277.1		78.5		1,598.8		1,954.4		139.6		233.8		1,689.1		2,062.5
Private Equity	—		—		1,684.9		1,684.9		—		—		1,702.7		1,702.7
Real Assets	181.8		—		731.0		912.8		218.3		—		702.8		921.1
Total	$	866.6	$	78.5	$	5,116.9	$	6,062.0	$	1,080.4	$	233.8	$	5,479.8	$	6,794.0
Less:  401(h) PBOP Assets (2)							(255.6)								(298.5)
Total Pension Assets							$	5,806.4							$	6,495.5

	PBOP Plan
	Fair Value Measurements as of December 31,
(Millions of Dollars)	2022								2021
Asset Category:	Level 1		Level 2		Uncategorized		Total		Level 1		Level 2		Uncategorized		Total
Equity Securities	$	153.2	$	—	$	183.5	$	336.7	$	191.4	$	—	$	248.3	$	439.7
Fixed Income	18.2		40.2		141.1		199.5		49.7		45.2		125.5		220.4
Private Equity	—		—		70.9		70.9		—		—		58.7		58.7
Real Assets	71.2		—		36.2		107.4		90.0		—		31.0		121.0
Total	$	242.6	$	40.2	$	431.7	$	714.5	$	331.1	$	45.2	$	463.5	$	839.8
Add:  401(h) PBOP Assets (2)							255.6								298.5
Total PBOP Assets							$	970.1							$	1,138.3

(1)     Fixed Income investments classified as Level 1 as of December 31, 2022 include pending redemption settlements of $138 million.

(2)     The assets of the Pension Plan include a 401(h) account that has been allocated to provide health and welfare postretirement benefits under the PBOP Plan.

Schedule of Defined Contribution Plans

The total Eversource 401k Plan employer matching contributions, including the K-Vantage contributions, were as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
2022	$	59.9	$	7.7	$	12.8	$	4.8
2021	55.5		7.0		12.2		4.3
2020	49.4		6.6		11.8		4.1

Summary of Share Transactions

A summary of RSU transactions is as follows:

	RSUs (Units)	Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2021	594,623	$	65.70
Granted	218,005	$	85.96
Shares Issued	(174,633)	$	79.89
Forfeited	(8,261)	$	85.87
Outstanding as of December 31, 2022	629,734	$	68.52

A summary of performance share transactions is as follows:

	Performance Shares (Units)	Weighted Average Grant-Date Fair Value
Outstanding as of December 31, 2021	464,507	$	80.54
Granted	337,406	$	83.34
Shares Issued	(248,981)	$	68.96
Forfeited	(5,642)	$	85.28
Outstanding as of December 31, 2022	547,290	$	87.49

Schedule of Compensation Expense and Income Tax Benefit

The total compensation expense and associated future income tax benefits recognized by Eversource, CL&P, NSTAR Electric and PSNH for share-based compensation awards were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Compensation Expense	$	33.4	$	28.2	$	33.9
Future Income Tax Benefit	8.7		7.3		8.9

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Compensation Expense	$	10.0	$	10.7	$	3.6	$	8.8	$	9.0	$	3.0	$	10.9	$	11.3	$	3.6
Future Income Tax Benefit	2.6		2.8		0.9		2.3		2.3		0.8		2.9		3.0		1.0

Schedule of Other Retirement Benefits

The liability and expense amounts are as follows:

Eversource (Millions of Dollars)	As of and For the Years Ended December 31,
	2022		2021		2020
Actuarially-Determined Liability	$	43.4	$	42.8	$	45.7
Other Retirement Benefits Expense (1)	10.9		2.2		3.3

	As of and For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Actuarially-Determined Liability	$	0.2	$	0.1	$	1.3	$	0.2	$	0.1	$	1.5	$	0.2	$	0.1	$	1.7
Other Retirement Benefits Expense (1)	4.0		3.7		1.3		0.7		0.7		0.3		1.2		1.1		0.5

(1)    Other Retirement Benefits Expense in 2022 includes a one-time special retirement benefit payable of $9.2 million.

XML

INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Components of Income Tax Expense

The components of income tax expense are as follows:

Eversource (Millions of Dollars)	For the Years Ended December 31,
	2022		2021		2020
Current Income Taxes:
Federal	$	95.8	$	21.5	$	73.6
State	13.6		(21.6)		19.1
Total Current	109.4		(0.1)		92.7
Deferred Income Taxes, Net:
Federal	198.8		199.7		173.5
State	148.0		147.4		83.7
Total Deferred	346.8		347.1		257.2
Investment Tax Credits, Net	(2.6)		(2.8)		(3.7)
Income Tax Expense	$	453.6	$	344.2	$	346.2

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Current Income Taxes:
Federal	$	106.2	$	55.0	$	29.6	$	15.0	$	52.3	$	43.1	$	12.0	$	53.9	$	20.6
State	20.1		8.7		5.9		(7.0)		6.2		10.8		(6.1)		6.9		3.8
Total Current	126.3		63.7		35.5		8.0		58.5		53.9		5.9		60.8		24.4
Deferred Income Taxes, Net:
Federal	17.2		35.6		5.9		76.3		16.3		(14.9)		101.1		33.8		(1.3)
State	28.2		42.4		9.9		47.6		41.2		0.4		43.4		38.8		8.6
Total Deferred	45.4		78.0		15.8		123.9		57.5		(14.5)		144.5		72.6		7.3
Investment Tax Credits, Net	(0.5)		(1.7)		—		(0.6)		(1.7)		—		(0.7)		(2.6)		—
Income Tax Expense	$	171.2	$	140.0	$	51.3	$	131.3	$	114.3	$	39.4	$	149.7	$	130.8	$	31.7

Summary of Reconciliation Between Income Tax Expense and Expected Tax

A reconciliation between income tax expense and the expected tax expense at the statutory rate is as follows:

Eversource (Millions of Dollars, except percentages)	For the Years Ended December 31,
	2022			2021			2020
Income Before Income Tax Expense	$	1,866.0		$	1,572.3		$	1,558.9
Statutory Federal Income Tax Expense at 21%	391.9			330.2			327.4
Tax Effect of Differences:
Depreciation	(17.1)			(18.1)			(11.1)
Investment Tax Credit Amortization	(2.6)			(2.8)			(3.7)
State Income Taxes, Net of Federal Impact	75.9			54.4			44.9
Dividends on ESOP	(5.1)			(5.1)			(5.1)
Tax Asset Valuation Allowance/Reserve Adjustments	51.6			44.6			33.4
Excess Stock Benefit	(2.1)			(4.0)			(6.6)
EDIT Amortization	(49.1)			(69.1)			(48.7)
Other, Net	10.2			14.1			15.7
Income Tax Expense	$	453.6		$	344.2		$	346.2
Effective Tax Rate	24.3		%	21.9		%	22.2		%

	For the Years Ended December 31,
	2022									2021									2020
(Millions of Dollars, except percentages)	CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH			CL&P			NSTAR Electric			PSNH
Income Before Income Tax Expense	$	704.1		$	632.4		$	222.9		$	533.0		$	590.9		$	189.8		$	607.6		$	575.8		$	179.0
Statutory Federal Income Tax Expense at 21%	147.9			132.8			46.8			111.9			124.1			39.9			127.6			120.9			37.6
Tax Effect of Differences:
Depreciation	(3.7)			(4.2)			0.9			(6.4)			(3.4)			(0.2)			0.4			(3.7)			(1.4)
Investment Tax Credit Amortization	(0.5)			(1.7)			—			(0.6)			(1.7)			—			(0.7)			(2.6)			—
State Income Taxes, Net of Federal Impact	(6.6)			40.3			12.5			(4.6)			37.5			8.9			(1.2)			36.0			9.8
Tax Asset Valuation   Allowance/Reserve Adjustments	44.7			—			—			36.7			—			—			30.7			—			—
Excess Stock Benefit	(0.7)			(0.8)			(0.3)			(1.5)			(1.4)			(0.5)			(2.3)			(2.3)			(0.8)
EDIT Amortization	(9.2)			(29.2)			(7.7)			(9.8)			(43.2)			(10.5)			(9.0)			(20.4)			(15.4)
Other, Net	(0.7)			2.8			(0.9)			5.6			2.4			1.8			4.2			2.9			1.9
Income Tax Expense	$	171.2		$	140.0		$	51.3		$	131.3		$	114.3		$	39.4		$	149.7		$	130.8		$	31.7
Effective Tax Rate	24.3		%	22.1		%	23.0		%	24.6		%	19.3		%	20.8		%	24.6		%	22.7		%	17.7		%

Schedule of Accumulated Deferred Income Tax Obligations

The tax effects of temporary differences that give rise to the net accumulated deferred income tax obligations are as follows:

	As of December 31,
	2022								2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Deferred Tax Assets:
Employee Benefits	$	228.9	$	25.3	$	57.4	$	11.6	$	270.8	$	23.9	$	40.3	$	14.1
Derivative Liabilities	53.8		53.8		—		—		76.8		76.8		—		—
Regulatory Deferrals - Liabilities	529.5		146.6		285.7		42.1		390.7		90.9		215.4		24.3
Allowance for Uncollectible Accounts	125.5		60.5		20.7		7.9		104.1		48.8		21.5		6.2
Tax Effect - Tax Regulatory Liabilities	762.9		324.6		241.8		97.8		783.4		328.2		254.3		100.9
Net Operating Loss Carryforwards	16.7		—		—		—		7.5		—		—		—
Purchase Accounting Adjustment	62.0		—		—		—		67.2		—		—		—
Other	176.6		109.5		20.5		21.3		196.6		103.9		21.7		22.9
Total Deferred Tax Assets	1,955.9		720.3		626.1		180.7		1,897.1		672.5		553.2		168.4
Less:  Valuation Allowance	82.8		63.3		—		—		61.5		44.5		—		—
Net Deferred Tax Assets	$	1,873.1	$	657.0	$	626.1	$	180.7	$	1,835.6	$	628.0	$	553.2	$	168.4
Deferred Tax Liabilities:
Accelerated Depreciation and Other   Plant-Related Differences	$	4,793.7	$	1,602.0	$	1,643.7	$	523.8	$	4,426.0	$	1,509.5	$	1,553.7	$	482.9
Property Tax Accruals	95.3		40.7		41.3		6.7		88.1		40.5		33.7		6.3
Regulatory Amounts:
Regulatory Deferrals - Assets	1,251.9		406.4		407.9		165.2		1,260.3		438.3		337.6		198.4
Tax Effect - Tax Regulatory Assets	271.7		185.6		10.7		7.9		257.8		181.4		10.9		8.3
Goodwill-related Regulatory Asset - 1999 Merger	76.8		—		65.9		—		81.4		—		69.9		—
Employee Benefits	305.5		45.0		140.8		18.7		174.7		3.5		107.1		0.7
Derivative Assets	10.5		10.5		—		—		14.9		14.9		—		—
Other	135.6		6.8		16.7		21.2		129.5		2.0		19.8		9.8
Total Deferred Tax Liabilities	$	6,941.0	$	2,297.0	$	2,327.0	$	743.5	$	6,432.7	$	2,190.1	$	2,132.7	$	706.4

Summary of Tax Credits and Loss Carryforwards

The following table provides the amounts and expiration dates of state tax credit and loss carryforwards and federal tax credit and net operating loss carryforwards:

	As of December 31,
	2022									2021
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Expiration Range	Eversource		CL&P		NSTAR Electric		PSNH		Expiration Range
State Net Operating Loss	$	288.1	$	—	$	—	$	—	2022 - 2041	$	138.3	$	—	$	—	$	—	2021 - 2040
State Tax Credit	204.5		137.7		—		—		2022 - 2027	197.7		137.0		—		—		2021 - 2026
State Charitable Contribution	20.1		—		—		—		2022 - 2026	23.7		—		—		—		2021 - 2025

Summary of Income Tax Contingencies

A reconciliation of the activity in unrecognized tax benefits, all of which would impact the effective tax rate if recognized, is as follows:

(Millions of Dollars)	Eversource		CL&P
Balance as of January 1, 2020	$	55.0	$	23.1
Gross Increases - Current Year	11.9		4.6
Gross Increases - Prior Year	1.4		0.7
Lapse of Statute of Limitations	(6.5)		(2.6)
Balance as of December 31, 2020	61.8		25.8
Gross Increases - Current Year	11.3		3.8
Gross Decreases - Prior Year	(0.3)		(0.6)
Lapse of Statute of Limitations	(7.0)		(2.8)
Balance as of December 31, 2021	65.8		26.2
Gross Increases - Current Year	11.5		3.5
Gross Decreases - Prior Year	(2.4)		(0.9)
Lapse of Statute of Limitations	(7.8)		(3.3)
Balance as of December 31, 2022	$	67.1	$	25.5

Summary of Income Tax Examinations

The following table summarizes Eversource, CL&P, NSTAR Electric, and PSNH's tax years that remain subject to examination by major tax jurisdictions as of December 31, 2022:

Description	Tax Years
Federal	2022
Connecticut	2019 - 2022
Massachusetts	2019 - 2022
New Hampshire	2019 - 2022

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COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Schedule of Environmental Loss Contingencies by Site

A reconciliation of the activity in the environmental reserves is as follows:

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
Balance as of January 1, 2021	$	102.4	$	12.3	$	4.7	$	7.1
Additions	23.4		4.4		—		—
Payments/Reductions	(10.4)		(2.8)		(1.4)		(0.8)
Balance as of December 31, 2021	115.4		13.9		3.3		6.3
Additions	12.6		0.9		0.4		0.5
Payments/Reductions	(5.4)		(0.9)		(0.3)		(0.7)
Balance as of December 31, 2022	$	122.6	$	13.9	$	3.4	$	6.1

The number of environmental sites for which remediation or long-term monitoring, preliminary site work or site assessment is being performed are as follows:

	Eversource	CL&P	NSTAR Electric	PSNH
2022	59	13	10	8
2021	61	14	11	9

Schedule of Estimated Future Annual Costs of Long term Contractual Agreement

The estimated future annual costs of significant executed, non-cancelable, long-term contractual arrangements in effect as of December 31, 2022 are as follows:

Eversource
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	751.8	$	952.6	$	954.8	$	983.0	$	998.5	$	8,141.1	$	12,781.8
Natural Gas Procurement	447.1		419.4		340.9		298.5		269.4		1,450.6		3,225.9
Purchased Power and Capacity	87.6		86.8		75.2		2.9		2.7		7.2		262.4
Peaker CfDs	20.3		21.1		17.9		16.0		11.4		64.4		151.1
Transmission Support Commitments	17.8		20.7		22.6		22.6		22.6		22.6		128.9
Total	$	1,324.6	$	1,500.6	$	1,411.4	$	1,323.0	$	1,304.6	$	9,685.9	$	16,550.1

CL&P
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	594.8	$	609.1	$	610.2	$	607.6	$	609.0	$	2,253.1	$	5,283.8
Purchased Power and Capacity	83.5		83.9		72.4		0.1		—		—		239.9
Peaker CfDs	20.3		21.1		17.9		16.0		11.4		64.4		151.1
Transmission Support Commitments	7.0		8.2		8.9		8.9		8.9		8.9		50.8
Total	$	705.6	$	722.3	$	709.4	$	632.6	$	629.3	$	2,326.4	$	5,725.6

NSTAR Electric
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	79.2	$	270.0	$	316.5	$	322.9	$	328.6	$	5,519.8	$	6,837.0
Purchased Power and Capacity	2.9		2.9		2.8		2.8		2.7		7.2		21.3
Transmission Support Commitments	7.0		8.1		8.9		8.9		8.9		8.9		50.7
Total	$	89.1	$	281.0	$	328.2	$	334.6	$	340.2	$	5,535.9	$	6,909.0

PSNH
(Millions of Dollars)	2023		2024		2025		2026		2027		Thereafter		Total
Renewable Energy Purchase Contracts	$	77.8	$	73.5	$	28.1	$	52.5	$	60.9	$	368.2	$	661.0
Purchased Power and Capacity	1.2		—		—		—		—		—		1.2
Transmission Support Commitments	3.8		4.4		4.8		4.8		4.8		4.8		27.4
Total	$	82.8	$	77.9	$	32.9	$	57.3	$	65.7	$	373.0	$	689.6

The total costs incurred under these agreements were as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Renewable Energy Purchase Contracts	$	678.1	$	609.2	$	584.2
Natural Gas Procurement	1,042.8		712.7		453.4
Purchased Power and Capacity	61.6		56.4		62.7
Peaker CfDs	13.4		24.3		22.7
Transmission Support Commitments	12.7		15.4		22.1

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Renewable Energy Purchase Contracts	$	513.2	$	90.8	$	74.1	$	457.1	$	84.7	$	67.4	$	426.3	$	88.8	$	69.1
Purchased Power and Capacity	57.7		3.0		0.9		53.1		3.0		0.3		59.3		3.1		0.3
Peaker CfDs	13.4		—		—		24.3		—		—		22.7		—		—
Transmission Support Commitments	5.0		5.0		2.7		6.1		6.0		3.3		8.7		8.7		4.7

Schedule of Guarantor Obligations

The following table summarizes Eversource parent's exposure to guarantees and indemnifications of its subsidiaries and affiliates to external parties, and primarily relates to its offshore wind business:  

As of December 31, 2022
Company (Obligor)	Description	Maximum Exposure (in millions)		Expiration Dates
North East Offshore LLC	Construction-related purchase agreements with third-party contractors (1)	$	717.6	(1)
Sunrise Wind LLC	Construction-related purchase agreements with third-party contractors (2)	311.5		2025 - 2026
Revolution Wind, LLC	Construction-related purchase agreements with third-party contractors (3)	419.1		2024 - 2027
South Fork Wind, LLC	Construction-related purchase agreements with third-party contractors (4)	142.1		2023 - 2026
Eversource Investment LLC	Funding and indemnification obligations of North East Offshore LLC (5)	77.0		(5)
South Fork Wind, LLC	Power Purchase Agreement Security (6)	7.1		(6)
Sunrise Wind LLC	OREC capacity production (7)	2.2		(7)
Bay State Wind LLC	Real estate purchase	2.5		2023
South Fork Wind, LLC	Transmission interconnection	1.2		—
Eversource Investment LLC	Letters of Credit (8)	4.3		—
Various	Surety bonds (9)	35.7		2023
Eversource Service	Lease payments for real estate	0.5		2024

(1)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, North East Offshore LLC (NEO), under which Eversource parent agreed to guarantee 50 percent of NEO’s performance of obligations under certain purchase agreements with third-party contractors, in an aggregate amount not to exceed $1.3 billion with an expiration date in 2025. Eversource parent also issued a separate guarantee to Ørsted on behalf of NEO, under which Eversource parent agreed to guarantee 50 percent of NEO’s payment obligations under certain offshore wind project construction-related agreements with Ørsted in an aggregate amount not to exceed $62.5 million and expiring upon full performance of the guaranteed obligation. Any amounts paid under this guarantee to Ørsted will count toward, but not increase, the maximum amount of the Funding Guarantee described in Note 5, below.

(2)     Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an aggregate amount not to exceed $465.8 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from March 2025 and April 2026 and (ii) full performance of the guaranteed obligations.     

(3)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, Revolution Wind, LLC, whereby Eversource parent will guarantee Revolution Wind, LLC's performance of certain obligations, in an aggregate amount not to exceed $546.7 million, in connection with construction-related purchase agreements. Eversource parent’s obligations under the guarantees expire upon the earlier of (i) dates ranging from May 2024 and November 2027 and (ii) full performance of the guaranteed obligations.

(4)    Eversource parent issued guarantees on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations in connection with construction-related purchase agreements. Under these guarantees, Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in a total aggregate amount not to exceed $207.7 million. Eversource parent’s obligations under these guarantees expire upon the earlier of (i) dates ranging from June 2023 and August 2026 and (ii) full performance of the guaranteed obligations.

(5)    Eversource parent issued a guarantee (Funding Guarantee) on behalf of Eversource Investment LLC (EI), its wholly-owned subsidiary that holds a 50 percent ownership interest in NEO, under which Eversource parent agreed to guarantee certain funding obligations and certain indemnification payments of EI under the operating agreement of NEO, in an amount not to exceed $910 million. The guaranteed obligations include payment of EI's funding obligations during the construction phase of NEO’s underlying offshore wind projects and indemnification obligations associated with third party credit support for its investment in NEO. Eversource parent’s obligations under the Funding Guarantee expire upon the full performance of the guaranteed obligations.

(6)    Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, South Fork Wind, LLC, whereby Eversource parent will guarantee South Fork Wind, LLC's performance of certain obligations, in an amount not to exceed $7.1 million, under a Power Purchase Agreement between the Long Island Power Authority and South Fork Wind, LLC (the Agreement). The guarantee expires upon the later of (i) the end of the Agreement term and (ii) full performance of the guarantee obligations.

(7)    Eversource parent issued a guarantee on behalf of its 50 percent-owned affiliate, Sunrise Wind LLC, whereby Eversource parent will guarantee Sunrise Wind LLC's performance of certain obligations, in an amount not to exceed $15.4 million, under the Offshore Wind Renewable Energy Certificate Purchase and Sale Agreement (the Agreement). The Agreement was executed by and between the New York State Energy Research and Development Authority (NYSERDA) and Sunrise Wind LLC. The guarantee expires upon the full performance of the guaranteed obligations.     Effective January 1, 2023, exposure under the guarantee increased from $2.2 million to $11.0 million.

(8)    On September 16, 2020, Eversource parent entered into a guarantee on behalf of EI, which holds Eversource's investments in offshore wind-related equity method investments, under which Eversource parent would guarantee EI's obligations under a letter of credit facility with a financial institution that EI may request in an aggregate amount of up to approximately $25 million. In January 2022, Eversource parent issued two letters of credit on behalf of South Fork Wind, LLC related to future decommissioning obligations of certain onshore transmission assets totaling $4.3 million.

(9)    Surety bond expiration dates reflect termination dates, the majority of which will be renewed or extended.  Certain surety bonds contain credit ratings triggers that would require Eversource parent to post collateral in the event that the unsecured debt credit ratings of Eversource parent are downgraded.

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LEASES (Tables)

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Components of Lease Cost

The components of lease cost, prior to amounts capitalized, are as follows:

Eversource	For the Years Ended December 31,
(Millions of Dollars)	2022		2021		2020
Finance Lease Cost:
Amortization of Right-of-use-Assets	$	8.3	$	4.6	$	2.6
Interest on Lease Liabilities	2.0		3.9		1.4
Total Finance Lease Cost	10.3		8.5		4.0
Operating Lease Cost	11.6		12.2		11.1
Variable Lease Cost	78.1		61.0		57.8
Total Lease Cost	$	100.0	$	81.7	$	72.9

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Finance Lease Cost:
Amortization of Right-of-use-Assets	$	—	$	0.2	$	0.1	$	0.5	$	0.2	$	0.1	$	0.7	$	0.2	$	0.1
Interest on Lease Liabilities	—		0.6		—		0.1		0.6		—		0.3		0.6		—
Total Finance Lease Cost	—		0.8		0.1		0.6		0.8		0.1		1.0		0.8		0.1
Operating Lease Cost	0.3		2.3		0.1		0.3		2.3		0.1		0.6		2.1		0.1
Variable Lease Cost	25.6		—		52.5		16.2		—		44.8		12.2		—		45.6
Total Lease Cost	$	25.9	$	3.1	$	52.7	$	17.1	$	3.1	$	45.0	$	13.8	$	2.9	$	45.8

Supplemental Balance Sheet Information Related to Leases

Supplemental balance sheet information related to leases is as follows:

		As of December 31, 2022								As of December 31, 2021
(Millions of Dollars)	Balance Sheet Classification	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Operating Leases:
Right-of-use-Assets, Net	Other Long-Term Assets	$	56.9	$	2.2	$	22.5	$	—	$	47.2	$	0.1	$	24.3	$	0.3
Operating Lease Liabilities
Current Portion	Other Current Liabilities	$	9.0	$	0.6	$	1.2	$	—	$	10.0	$	0.1	$	1.1	$	—
Long-Term	Other Long-Term Liabilities	47.9		1.6		21.3		—		37.2		—		23.2		0.3
Total Operating Lease Liabilities		$	56.9	$	2.2	$	22.5	$	—	$	47.2	$	0.1	$	24.3	$	0.3
Finance Leases:
Right-of-use-Assets, Net	Property, Plant and Equipment, Net	$	54.5	$	—	$	3.2	$	—	$	58.0	$	—	$	3.3	$	0.7
Finance Lease Liabilities
Current Portion	Other Current Liabilities	$	3.8	$	—	$	—	$	—	$	3.9	$	—	$	—	$	0.1
Long-Term	Other Long-Term Liabilities	54.2		—		4.9		—		55.4		—		4.9		0.6
Total Finance Lease Liabilities		$	58.0	$	—	$	4.9	$	—	$	59.3	$	—	$	4.9	$	0.7

Other Information Related to Leases

Other information related to leases is as follows:

	As of December 31,
	2022								2021
	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Weighted-Average Remaining Lease Term (Years):
Operating Leases	11		4		17		—		13		7		18		7
Finance Leases	15		—		19		—		16		—		20		7
Weighted-Average Discount Rate (Percentage):
Operating Leases	3.2	%	3.8	%	4.0	%	—	%	4.1	%	3.0	%	4.0	%	3.7	%
Finance Leases	2.7	%	—	%	2.9	%	—	%	2.7	%	—	%	2.9	%	3.5	%

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2022
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	11.3	$	0.3	$	2.1	$	0.1
Operating Cash Flows from Finance Leases	2.0		—		0.6		—
Financing Cash Flows from Finance Leases	3.9		—		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	18.9		2.4		—		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	3.5		—		—		—

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2021
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	12.1	$	0.3	$	2.1	$	0.1
Operating Cash Flows from Finance Leases	3.4		0.1		0.6		—
Financing Cash Flows from Finance Leases	4.1		1.4		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	2.1		—		1.9		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	2.3		—		—		—

(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH
For the Year Ended December 31, 2020
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$	10.9	$	0.6	$	1.8	$	0.1
Operating Cash Flows from Finance Leases	1.7		0.3		0.6		—
Financing Cash Flows from Finance Leases	2.8		1.6		—		0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	0.6		0.1		0.2		—
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	0.7		—		0.3		—

Future Minimum Lease Payments under Long-Term Finance Leases

Future minimum lease payments, excluding variable costs, under long-term leases, as of December 31, 2022 are as follows:

	Operating Leases						Finance Leases
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		Eversource		NSTAR Electric
Year Ending December 31,
2023	$	10.3	$	0.7	$	2.1	$	5.9	$	0.6
2024	9.3		0.7		2.1		5.9		0.6
2025	6.4		0.7		1.7		5.9		0.6
2026	5.5		0.3		1.7		5.4		0.7
2027	5.2		—		1.7		5.4		0.7
Thereafter	31.2		—		23.6		50.9		11.8
Future lease payments	67.9		2.4		32.9		79.4		15.0
Less amount representing interest	11.0		0.2		10.4		21.4		10.1
Present value of future minimum lease payments	$	56.9	$	2.2	$	22.5	$	58.0	$	4.9

Future Minimum Lease Payments under Long-Term Operating Leases

Future minimum lease payments, excluding variable costs, under long-term leases, as of December 31, 2022 are as follows:

	Operating Leases						Finance Leases
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		Eversource		NSTAR Electric
Year Ending December 31,
2023	$	10.3	$	0.7	$	2.1	$	5.9	$	0.6
2024	9.3		0.7		2.1		5.9		0.6
2025	6.4		0.7		1.7		5.9		0.6
2026	5.5		0.3		1.7		5.4		0.7
2027	5.2		—		1.7		5.4		0.7
Thereafter	31.2		—		23.6		50.9		11.8
Future lease payments	67.9		2.4		32.9		79.4		15.0
Less amount representing interest	11.0		0.2		10.4		21.4		10.1
Present value of future minimum lease payments	$	56.9	$	2.2	$	22.5	$	58.0	$	4.9

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Carrying Amounts and Estimated Fair Values of Financial Instruments

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 Amount		Fair Value		Carrying Amount		Fair Value		Carrying Amount		Fair Value		Carrying Amount		Fair Value
As of December 31, 2022:
Preferred Stock Not Subject to Mandatory Redemption	$	155.6	$	136.7	$	116.2	$	99.2	$	43.0	$	37.5	$	—	$	—
Long-Term Debt	21,044.1		18,891.3		4,216.5		3,828.3		4,425.1		4,091.8		1,164.6		970.5
Rate Reduction Bonds	453.7		424.7		—		—		—		—		453.7		424.7
As of December 31, 2021:
Preferred Stock Not Subject to Mandatory Redemption	$	155.6	$	166.3	$	116.2	$	122.3	$	43.0	$	44.0	$	—	$	—
Long-Term Debt	18,216.7		19,636.3		4,215.4		4,848.9		3,985.4		4,453.5		1,163.8		1,220.6
Rate Reduction Bonds	496.9		543.3		—		—		—		—		496.9		543.3

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ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Tables)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Changes in Accumulated Other Comprehensive Income/(Loss) by Component, Net of Tax

The changes in accumulated other comprehensive income/(loss) by component, net of tax, are as follows:

	For the Year Ended December 31, 2022								For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Qualified Cash Flow Hedging Instruments		Unrealized Gains/(Losses) on Marketable Securities		Defined Benefit Plans		Total		Qualified Cash Flow Hedging Instruments		Unrealized Gains/(Losses) on Marketable Securities		Defined Benefit Plans		Total
Balance as of January 1st	$	(0.4)	$	0.4	$	(42.3)	$	(42.3)	$	(1.4)	$	1.1	$	(76.1)	$	(76.4)
OCI Before Reclassifications	—		(1.6)		(2.5)		(4.1)		—		(0.7)		24.1		23.4
Amounts Reclassified from AOCI	—		—		7.0		7.0		1.0		—		9.7		10.7
Net OCI	—		(1.6)		4.5		2.9		1.0		(0.7)		33.8		34.1
Balance as of December 31st	$	(0.4)	$	(1.2)	$	(37.8)	$	(39.4)	$	(0.4)	$	0.4	$	(42.3)	$	(42.3)

Schedule of Amounts Reclassified from AOCI by Component

The following table sets forth the amounts reclassified from AOCI by component and the impacted line item on the statements of income:

	Amounts Reclassified from AOCI
Eversource (Millions of Dollars)	For the Years Ended December 31,						Statements of Income Line Item Impacted
	2022		2021		2020
Qualified Cash Flow Hedging Instruments	$	—	$	(1.7)	$	(2.5)	Interest Expense
Tax Effect	—		0.7		0.9		Income Tax Expense
Qualified Cash Flow Hedging Instruments, Net of Tax	$	—	$	(1.0)	$	(1.6)
Defined Benefit Plan Costs:
Amortization of Actuarial Losses	$	(9.0)	$	(13.1)	$	(8.1)	Other Income, Net (1)
Amortization of Prior Service Cost	(0.3)		—		(0.3)		Other Income, Net (1)
Total Defined Benefit Plan Costs	(9.3)		(13.1)		(8.4)
Tax Effect	2.3		3.4		2.1		Income Tax Expense
Defined Benefit Plan Costs, Net of Tax	$	(7.0)	$	(9.7)	$	(6.3)
Total Amounts Reclassified from AOCI, Net of Tax	$	(7.0)	$	(10.7)	$	(7.9)

(1)    These amounts are included in the computation of net periodic Pension, SERP and PBOP costs.  See Note 1K, "Summary of Significant Accounting Policies – Other Income, Net" and Note 11A, "Employee Benefits – Pension Benefits and Postretirement Benefits Other Than Pension," for further information.

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COMMON SHARES (Tables)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Common Shares Authorized and Issued

The following table sets forth the Eversource parent common shares and the shares of common stock of CL&P, NSTAR Electric and PSNH that were authorized and issued, as well as the respective per share par values:  

	Shares
	Par Value		Authorized as of December 31, 2022 and 2021	Issued as of December 31,
				2022	2021
Eversource	$	5	380,000,000	359,984,073	357,818,402
CL&P	$	10	24,500,000	6,035,205	6,035,205
NSTAR Electric	$	1	100,000,000	200	200
PSNH	$	1	100,000,000	301	301

Details of preferred stock not subject to mandatory redemption are as follows (in millions, except in redemption price and shares):

		Redemption Price Per Share		Shares Outstanding as of December 31,		As of December 31,
Series				2022	2021	2022		2021
CL&P
$1.90	Series of 1947	$	52.50	163,912	163,912	$	8.2	$	8.2
$2.00	Series of 1947	$	54.00	336,088	336,088	16.8		16.8
$2.04	Series of 1949	$	52.00	100,000	100,000	5.0		5.0
$2.20	Series of 1949	$	52.50	200,000	200,000	10.0		10.0
3.90%	Series of 1949	$	50.50	160,000	160,000	8.0		8.0
$2.06	Series E of 1954	$	51.00	200,000	200,000	10.0		10.0
$2.09	Series F of 1955	$	51.00	100,000	100,000	5.0		5.0
4.50%	Series of 1956	$	50.75	104,000	104,000	5.2		5.2
4.96%	Series of 1958	$	50.50	100,000	100,000	5.0		5.0
4.50%	Series of 1963	$	50.50	160,000	160,000	8.0		8.0
5.28%	Series of 1967	$	51.43	200,000	200,000	10.0		10.0
$3.24	Series G of 1968	$	51.84	300,000	300,000	15.0		15.0
6.56%	Series of 1968	$	51.44	200,000	200,000	10.0		10.0
Total CL&P				2,324,000	2,324,000	$	116.2	$	116.2
NSTAR Electric
4.25%	Series of 1956	$	103.625	180,000	180,000	$	18.0	$	18.0
4.78%	Series of 1958	$	102.80	250,000	250,000	25.0		25.0
Total NSTAR Electric				430,000	430,000	$	43.0	$	43.0
Fair Value Adjustment due to Merger with NSTAR						(3.6)		(3.6)
Other
6.00%	Series of 1958	$	100.00	23	23	$	—	$	—
Total Eversource - Noncontrolling Interest - Preferred Stock of Subsidiaries						$	155.6	$	155.6

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PREFERRED STOCK NOT SUBJECT TO MANDATORY REDEMPTION (Tables)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Schedule of Preferred Stock Not Subject to Mandatory Redemption

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
	Par Value		Authorized as of December 31, 2022 and 2021	Issued as of December 31,
				2022	2021
Eversource	$	5	380,000,000	359,984,073	357,818,402
CL&P	$	10	24,500,000	6,035,205	6,035,205
NSTAR Electric	$	1	100,000,000	200	200
PSNH	$	1	100,000,000	301	301

Details of preferred stock not subject to mandatory redemption are as follows (in millions, except in redemption price and shares):

		Redemption Price Per Share		Shares Outstanding as of December 31,		As of December 31,
Series				2022	2021	2022		2021
CL&P
$1.90	Series of 1947	$	52.50	163,912	163,912	$	8.2	$	8.2
$2.00	Series of 1947	$	54.00	336,088	336,088	16.8		16.8
$2.04	Series of 1949	$	52.00	100,000	100,000	5.0		5.0
$2.20	Series of 1949	$	52.50	200,000	200,000	10.0		10.0
3.90%	Series of 1949	$	50.50	160,000	160,000	8.0		8.0
$2.06	Series E of 1954	$	51.00	200,000	200,000	10.0		10.0
$2.09	Series F of 1955	$	51.00	100,000	100,000	5.0		5.0
4.50%	Series of 1956	$	50.75	104,000	104,000	5.2		5.2
4.96%	Series of 1958	$	50.50	100,000	100,000	5.0		5.0
4.50%	Series of 1963	$	50.50	160,000	160,000	8.0		8.0
5.28%	Series of 1967	$	51.43	200,000	200,000	10.0		10.0
$3.24	Series G of 1968	$	51.84	300,000	300,000	15.0		15.0
6.56%	Series of 1968	$	51.44	200,000	200,000	10.0		10.0
Total CL&P				2,324,000	2,324,000	$	116.2	$	116.2
NSTAR Electric
4.25%	Series of 1956	$	103.625	180,000	180,000	$	18.0	$	18.0
4.78%	Series of 1958	$	102.80	250,000	250,000	25.0		25.0
Total NSTAR Electric				430,000	430,000	$	43.0	$	43.0
Fair Value Adjustment due to Merger with NSTAR						(3.6)		(3.6)
Other
6.00%	Series of 1958	$	100.00	23	23	$	—	$	—
Total Eversource - Noncontrolling Interest - Preferred Stock of Subsidiaries						$	155.6	$	155.6

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REVENUES (Tables)

12 Months Ended

Dec. 31, 2022

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following tables present operating revenues disaggregated by revenue source:

	For the Year Ended December 31, 2022
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	4,796.1	$	1,204.9	$	—	$	141.7	$	—	$	—	$	6,142.7
Commercial	2,903.3		648.5		—		66.5		—		(4.1)		3,614.2
Industrial	374.9		199.7		—		4.7		—		(20.1)		559.2
Total Retail Tariff Sales Revenues	8,074.3		2,053.1		—		212.9		—		(24.2)		10,316.1
Wholesale Transmission Revenues	—		—		1,700.5		—		—		(1,264.5)		436.0
Wholesale Market Sales Revenues	1,190.9		140.8		—		3.8		—		—		1,335.5
Other Revenues from Contracts with Customers	72.3		5.6		14.1		8.4		1,435.5		(1,425.3)		110.6
Amortization of/(Reserve for) Revenues    Subject to Refund	72.0		—		0.7		(0.7)		—		—		72.0
Total Revenues from Contracts with Customers	9,409.5		2,199.5		1,715.3		224.4		1,435.5		(2,714.0)		12,270.2
Alternative Revenue Programs	(15.4)		14.8		92.7		(2.5)		—		(84.3)		5.3
Other Revenues	11.2		1.3		0.7		0.6		—		—		13.8
Total Operating Revenues	$	9,405.3	$	2,215.6	$	1,808.7	$	222.5	$	1,435.5	$	(2,798.3)	$	12,289.3

	For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	3,989.8	$	1,000.3	$	—	$	133.5	$	—	$	—	$	5,123.6
Commercial	2,486.1		497.6		—		62.8		—		(5.1)		3,041.4
Industrial	345.3		167.2		—		4.3		—		(17.1)		499.7
Total Retail Tariff Sales Revenues	6,821.2		1,665.1		—		200.6		—		(22.2)		8,664.7
Wholesale Transmission Revenues	—		—		1,751.3		—		86.6		(1,384.7)		453.2
Wholesale Market Sales Revenues	575.8		82.1		—		3.9		—		—		661.8
Other Revenues from Contracts with Customers	78.1		5.1		13.6		7.5		1,267.4		(1,257.7)		114.0
Reserve for Revenues Subject to Refund	(71.1)		—		(5.0)		(2.6)		—		—		(78.7)
Total Revenues from Contracts with Customers	7,404.0		1,752.3		1,759.9		209.4		1,354.0		(2,664.6)		9,815.0
Alternative Revenue Programs	14.7		37.0		(126.1)		1.5		—		114.6		41.7
Other Revenues	4.9		0.3		0.8		0.4		—		—		6.4
Total Operating Revenues	$	7,423.6	$	1,789.6	$	1,634.6	$	211.3	$	1,354.0	$	(2,550.0)	$	9,863.1

	For the Year Ended December 31, 2020
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	3,951.5	$	644.9	$	—	$	145.1	$	—	$	—	$	4,741.5
Commercial	2,353.4		361.9		—		62.4		—		(4.8)		2,772.9
Industrial	327.1		107.4		—		4.8		—		(13.7)		425.6
Total Retail Tariff Sales Revenues	6,632.0		1,114.2		—		212.3		—		(18.5)		7,940.0
Wholesale Transmission Revenues	—		—		1,557.3		—		74.2		(1,290.6)		340.9
Wholesale Market Sales Revenues	327.3		43.0		—		3.8		—		—		374.1
Other Revenues from Contracts with Customers	79.3		5.7		13.3		3.5		1,161.7		(1,152.0)		111.5
Total Revenues from Contracts with Customers	7,038.6		1,162.9		1,570.6		219.6		1,235.9		(2,461.1)		8,766.5
Alternative Revenue Programs	88.1		44.7		(35.2)		(4.7)		—		37.1		130.0
Other Revenues	5.6		1.1		0.7		0.5		—		—		7.9
Total Operating Revenues	$	7,132.3	$	1,208.7	$	1,536.1	$	215.4	$	1,235.9	$	(2,424.0)	$	8,904.4

	For the Years Ended December 31,
	2022						2021						2020
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Revenues from Contracts with Customers
Retail Tariff Sales
Residential	$	2,397.2	$	1,601.8	$	797.1	$	1,994.2	$	1,375.8	$	619.8	$	2,011.1	$	1,365.8	$	574.6
Commercial	1,067.9		1,457.4		380.8		890.6		1,265.0		332.2		878.3		1,176.8		299.9
Industrial	146.4		135.8		92.7		131.4		119.1		94.8		137.5		106.4		83.2
Total Retail Tariff Sales Revenues	3,611.5		3,195.0		1,270.6		3,016.2		2,759.9		1,046.8		3,026.9		2,649.0		957.7
Wholesale Transmission Revenues	755.1		670.4		275.0		863.3		616.3		271.7		754.8		576.5		226.0
Wholesale Market Sales Revenues	873.7		215.0		102.2		408.8		109.2		57.8		230.1		58.4		38.8
Other Revenues from Contracts    with Customers	30.2		46.9		11.8		26.7		56.2		11.3		32.9		43.6		14.2
Amortization of/(Reserve for) Revenues    Subject to Refund	72.7		—		—		(76.1)		—		—		—		—		4.6
Total Revenues from Contracts    with Customers	5,343.2		4,127.3		1,659.6		4,238.9		3,541.6		1,387.6		4,044.7		3,327.5		1,241.3
Alternative Revenue Programs	56.5		0.7		20.1		(78.9)		(15.1)		(17.4)		(4.2)		54.5		2.6
Other Revenues	1.8		7.2		2.9		0.4		3.4		1.9		2.2		3.5		0.6
Eliminations	(583.8)		(552.1)		(207.8)		(523.0)		(473.5)		(194.9)		(495.2)		(444.4)		(165.4)
Total Operating Revenues	$	4,817.7	$	3,583.1	$	1,474.8	$	3,637.4	$	3,056.4	$	1,177.2	$	3,547.5	$	2,941.1	$	1,079.1

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EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Components of Basic and Diluted EPS

The following table sets forth the components of basic and diluted EPS:

Eversource (Millions of Dollars, except share information)	For the Years Ended December 31,
	2022		2021		2020
Net Income Attributable to Common Shareholders	$	1,404.9	$	1,220.5	$	1,205.2
Weighted Average Common Shares Outstanding:
Basic	346,783,444		343,972,926		338,836,147
Dilutive Effect of:
Share-Based Compensation Awards and Other	463,324		658,130		738,994
Equity Forward Sale Agreement	—		—		271,921
Total Dilutive Effect	463,324		658,130		1,010,915
Diluted	347,246,768		344,631,056		339,847,062
Basic EPS	$	4.05	$	3.55	$	3.56
Diluted EPS	$	4.05	$	3.54	$	3.55

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SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Summary of Segment Information and Segmented Total Assets

Eversource's segment information is as follows:

	For the Year Ended December 31, 2022
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	9,405.3	$	2,215.6	$	1,808.7	$	222.5	$	1,435.5	$	(2,798.3)	$	12,289.3
Depreciation and Amortization	(970.4)		(157.6)		(337.4)		(50.9)		(132.6)		5.8		(1,643.1)
Other Operating Expenses	(7,663.7)		(1,727.0)		(548.4)		(111.8)		(1,189.1)		2,792.0		(8,448.0)
Operating Income	771.2		331.0		922.9		59.8		113.8		(0.5)		2,198.2
Interest Expense	(253.1)		(71.4)		(145.5)		(34.7)		(247.8)		74.2		(678.3)
Interest Income	45.1		10.2		0.5		—		66.3		(71.6)		50.5
Other Income, Net	180.4		33.6		37.9		8.5		1,600.8		(1,565.6)		295.6
Income Tax (Expense)/Benefit	(146.2)		(69.2)		(216.3)		3.2		(25.1)		—		(453.6)
Net Income	597.4		234.2		599.5		36.8		1,508.0		(1,563.5)		1,412.4
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	592.8	$	234.2	$	596.6	$	36.8	$	1,508.0	$	(1,563.5)	$	1,404.9
Total Assets (as of)	$	27,365.0	$	8,084.9	$	13,369.5	$	2,783.8	$	26,365.2	$	(24,737.5)	$	53,230.9
Cash Flows Used for Investments in Plant	$	1,172.6	$	710.3	$	1,144.0	$	154.4	$	260.6	$	—	$	3,441.9

	For the Year Ended December 31, 2021
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	7,423.6	$	1,789.6	$	1,634.6	$	211.3	$	1,354.0	$	(2,550.0)	$	9,863.1
Depreciation and Amortization	(737.8)		(142.3)		(300.3)		(46.1)		(113.1)		4.6		(1,335.0)
Other Operating Expenses	(5,970.0)		(1,345.4)		(496.2)		(101.4)		(1,170.4)		2,548.6		(6,534.8)
Operating Income	715.8		301.9		838.1		63.8		70.5		3.2		1,993.3
Interest Expense	(236.4)		(58.6)		(133.2)		(32.0)		(168.8)		46.6		(582.4)
Interest Income	20.7		4.5		2.2		—		46.0		(47.8)		25.6
Other Income, Net	78.1		17.9		19.8		3.3		1,363.9		(1,347.3)		135.7
Income Tax (Expense)/Benefit	(103.5)		(60.9)		(179.4)		1.7		(2.1)		—		(344.2)
Net Income	474.7		204.8		547.5		36.8		1,309.5		(1,345.3)		1,228.0
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	470.1	$	204.8	$	544.6	$	36.8	$	1,309.5	$	(1,345.3)	$	1,220.5
Total Assets (as of)	$	25,411.2	$	7,215.9	$	12,377.8	$	2,551.1	$	22,674.7	$	(21,738.6)	$	48,492.1
Cash Flows Used for Investments in Plant	$	1,053.3	$	721.1	$	1,024.1	$	137.2	$	239.4	$	—	$	3,175.1

	For the Year Ended December 31, 2020
Eversource (Millions of Dollars)	Electric Distribution		Natural Gas Distribution		Electric Transmission		Water Distribution		Other		Eliminations		Total
Operating Revenues	$	7,132.3	$	1,208.7	$	1,536.1	$	215.4	$	1,235.9	$	(2,424.0)	$	8,904.4
Depreciation and Amortization	(657.0)		(87.9)		(278.1)		(44.2)		(93.5)		1.6		(1,159.1)
Other Operating Expenses	(5,642.3)		(913.8)		(470.0)		(86.6)		(1,071.9)		2,428.0		(5,756.6)
Operating Income	833.0		207.0		788.0		84.6		70.5		5.6		1,988.7
Interest Expense	(216.0)		(40.0)		(126.8)		(32.9)		(161.0)		38.3		(538.4)
Interest Income	3.2		0.9		4.7		—		37.8		(41.8)		4.8
Other Income, Net	58.0		3.1		23.3		2.0		1,382.9		(1,365.5)		103.8
Income Tax (Expense)/Benefit	(129.6)		(36.9)		(183.8)		(12.5)		16.6		—		(346.2)
Net Income	548.6		134.1		505.4		41.2		1,346.8		(1,363.4)		1,212.7
Net Income Attributable to Noncontrolling Interests	(4.6)		—		(2.9)		—		—		—		(7.5)
Net Income Attributable to Common Shareholders	$	544.0	$	134.1	$	502.5	$	41.2	$	1,346.8	$	(1,363.4)	$	1,205.2
Cash Flows Used for Investments in Plant	$	1,079.0	$	494.4	$	1,004.6	$	118.8	$	246.2	$	—	$	2,943.0

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ACQUISITION OF ASSETS OF COLUMBIA GAS OF MASSACHUSETTS (Tables)

12 Months Ended

Dec. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Summary of Unaudited Pro Forma Financial Information

Pro forma net income excludes the impact of assets and liabilities not assumed by Eversource and non-recurring costs associated with the transaction.

(Pro forma amounts in millions, except share amounts)	For the Year Ended December 31, 2020
Operating Revenues	$	9,273
Net Income Attributable to Common Shareholders	1,265
Basic EPS	3.73
Diluted EPS	3.72

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GOODWILL (Tables)

12 Months Ended

Dec. 31, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill by Reportable Segment

The following table presents Eversource’s goodwill by reportable segment:

(Millions of Dollars)	Electric Distribution		Electric Transmission		Natural Gas Distribution		Water Distribution		Total
Balance as of January 1, 2021	$	2,543.6	$	576.8	$	441.4	$	884.2	$	4,446.0
CMA Measurement Period Adjustments	—		—		9.6		—		9.6
Acquisition of NESC	—		—		—		21.7		21.7
Balance as of December 31, 2021	$	2,543.6	$	576.8	$	451.0	$	905.9	$	4,477.3
NESC Measurement Period Adjustments	—		—		—		0.5		0.5
Acquisition of TWC	—		—		—		44.8		44.8
Balance as of December 31, 2022	$	2,543.6	$	576.8	$	451.0	$	951.2	$	4,522.6

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands, customer in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) customer regulatedUtility	Dec. 31, 2020 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 01, 2021 USD ($)	Dec. 31, 2019 USD ($)
Summary of Accounting Policies [Line Items]
Number of electric and natural gas customers | customer	4.4
Goodwill	$ 4,522,632	$ 4,446,000		$ 4,477,269
Allowance for uncollectible accounts for late fees and other receivable amounts	486,297	358,900		417,406		$ 224,800
Bill of forgiveness	521,752	264,950		221,008		117,063
Cash equivalents	374,600			66,800
Charitable contributions	8,000	6,400
Energy Relief Fund
Summary of Accounting Policies [Line Items]
Restricted cash, current	20,000
Restricted cash, noncurrent	15,900
Restricted cash				41,500
Electric Transmission
Summary of Accounting Policies [Line Items]
Goodwill	576,800	576,800		576,800
Retail (Non-Hardship), Wholesale, and Other
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	201,900	164,100		191,300		81,500
CL&P
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 225,320	157,400		181,319		97,300
Period of accounts receivable recoverable under financial or medical duress	180 days
Maximum loans receivable outstanding	$ 55,000
Loans transferred receivable current	9,100			10,500
Loans transferred receivable non-current	13,000			8,300
Bill of forgiveness	20,327	99,809		74,788		4,971
Cash equivalents	11,300			55,800
Long term receivable	25,000			25,000
CL&P | Customer Assistance Fund
Summary of Accounting Policies [Line Items]
Bill of forgiveness			$ 10,000
CL&P | Unfavorable Regulatory Action
Summary of Accounting Policies [Line Items]
Customer assistance initiatives					$ 10,000
CL&P | Retail (Non-Hardship), Wholesale, and Other
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 36,400	28,300		36,700		17,200
Yankee Gas Services Company
Summary of Accounting Policies [Line Items]
Period of accounts receivable recoverable under financial or medical duress	90 days
NSTAR Electric
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 94,958	91,600		97,005		75,400
Bill of forgiveness	345,293	17,410		18,179		6,312
Cash equivalents	327,700			700
Long term receivable	5,500			5,500
NSTAR Electric | Cash Infusion From Parent
Summary of Accounting Policies [Line Items]
Cash equivalents	327,000
NSTAR Electric | Retail (Non-Hardship), Wholesale, and Other
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	51,300	51,900		53,700		31,500
PSNH
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	29,236	17,200		24,331		10,500
Bill of forgiveness	36,812	$ 39,555		35,126		$ 36,688
Cash equivalents	100			0
Long term receivable	$ 3,800			3,800
Connecticut, Massachusetts and New Hampshire
Summary of Accounting Policies [Line Items]
Number of regulated utilities | regulatedUtility	12
COVID 19
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 50,900			55,300
COVID 19 | CL&P
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	16,000			23,900
COVID 19 | NSTAR Electric
Summary of Accounting Policies [Line Items]
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 4,100			$ 9,000

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Allowance for Uncollectible Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 417,406	$ 358,900	$ 224,800
Increase due to CMA acquisition			24,200
Uncollectible Expense	61,876	60,886	53,461
Uncollectible Costs Deferred	112,500	110,600	97,000
Write-Offs	(124,000)	(129,700)	(78,000)
Recoveries Collected	18,500	16,700	13,600
Ending Balance	486,297	417,406	358,900
Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance		23,800	23,800
Ending Balance			23,800
Hardship Accounts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	226,100	194,800	143,300
Increase due to CMA acquisition			0
Uncollectible Expense	0	0	0
Uncollectible Costs Deferred	77,800	51,900	43,100
Write-Offs	(21,300)	(22,000)	(14,700)
Recoveries Collected	1,800	1,400	1,500
Ending Balance	284,400	226,100	194,800
Hardship Accounts | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance			21,600
Retail (Non-Hardship), Wholesale, and Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	191,300	164,100	81,500
Increase due to CMA acquisition			24,200
Uncollectible Expense	61,900	60,900	53,500
Uncollectible Costs Deferred	34,700	58,700	53,900
Write-Offs	(102,700)	(107,700)	(63,300)
Recoveries Collected	16,700	15,300	12,100
Ending Balance	201,900	191,300	164,100
Retail (Non-Hardship), Wholesale, and Other | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance			2,200
CL&P
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	181,319	157,400	97,300
Increase due to CMA acquisition			0
Uncollectible Expense	15,578	13,495	12,882
Uncollectible Costs Deferred	59,500	57,800	49,000
Write-Offs	(38,300)	(54,200)	(29,700)
Recoveries Collected	7,200	6,800	5,700
Ending Balance	225,320	181,319	157,400
CL&P | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance		22,200	22,200
Ending Balance			22,200
CL&P | Hardship Accounts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	144,600	129,100	80,100
Increase due to CMA acquisition			0
Uncollectible Expense	0	0	0
Uncollectible Costs Deferred	58,300	32,300	38,200
Write-Offs	(15,300)	(18,000)	(11,900)
Recoveries Collected	1,300	1,200	1,400
Ending Balance	188,900	144,600	129,100
CL&P | Hardship Accounts | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance			21,300
CL&P | Retail (Non-Hardship), Wholesale, and Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	36,700	28,300	17,200
Increase due to CMA acquisition			0
Uncollectible Expense	15,600	13,500	12,900
Uncollectible Costs Deferred	1,200	25,500	10,800
Write-Offs	(23,000)	(36,200)	(17,800)
Recoveries Collected	5,900	5,600	4,300
Ending Balance	36,400	36,700	28,300
CL&P | Retail (Non-Hardship), Wholesale, and Other | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance			900
NSTAR Electric
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	97,005	91,600	75,400
Increase due to CMA acquisition			0
Uncollectible Expense	21,550	16,649	15,293
Uncollectible Costs Deferred	12,400	20,100	24,700
Write-Offs	(42,300)	(37,000)	(27,200)
Recoveries Collected	6,300	5,700	4,700
Ending Balance	94,958	97,005	91,600
NSTAR Electric | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance		(1,300)	(1,300)
Ending Balance			(1,300)
NSTAR Electric | Hardship Accounts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	43,300	39,700	43,900
Increase due to CMA acquisition			0
Uncollectible Expense	0	0	0
Uncollectible Costs Deferred	1,500	4,300	(1,700)
Write-Offs	(1,100)	(700)	(900)
Recoveries Collected	0	0	0
Ending Balance	43,700	43,300	39,700
NSTAR Electric | Hardship Accounts | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance			(1,600)
NSTAR Electric | Retail (Non-Hardship), Wholesale, and Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	53,700	51,900	31,500
Increase due to CMA acquisition			0
Uncollectible Expense	21,600	16,600	15,300
Uncollectible Costs Deferred	10,900	15,800	26,400
Write-Offs	(41,200)	(36,300)	(26,300)
Recoveries Collected	6,300	5,700	4,700
Ending Balance	51,300	53,700	51,900
NSTAR Electric | Retail (Non-Hardship), Wholesale, and Other | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance			300
PSNH
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	24,331	17,200	10,500
Increase due to CMA acquisition			0
Uncollectible Expense	9,211	13,113	5,164
Uncollectible Costs Deferred	2,500	3,100	7,400
Write-Offs	(7,700)	(10,000)	(6,900)
Recoveries Collected	900	900	700
Ending Balance	$ 29,236	24,331	17,200
PSNH | Restatement Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance		$ 300	300
Ending Balance			$ 300

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Materials, Supplies, Natural Gas, and REC Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Public Utilities, Inventory [Line Items]
Total	$ 374.4	$ 267.5
Materials and Supplies
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	221.0	148.9
Natural Gas
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	95.9	56.2
RECs
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	57.5	62.4
CL&P
Public Utilities, Inventory [Line Items]
Total	88.2	60.3
CL&P | Materials and Supplies
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	88.2	60.3
CL&P | Natural Gas
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	0.0	0.0
CL&P | RECs
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	0.0	0.0
NSTAR Electric
Public Utilities, Inventory [Line Items]
Total	138.4	116.7
NSTAR Electric | Materials and Supplies
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	81.0	55.0
NSTAR Electric | Natural Gas
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	0.0	0.0
NSTAR Electric | RECs
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	57.4	61.7
PSNH
Public Utilities, Inventory [Line Items]
Total	34.5	25.9
PSNH | Materials and Supplies
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	34.4	25.2
PSNH | Natural Gas
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	0.0	0.0
PSNH | RECs
Public Utilities, Inventory [Line Items]
Other inventory, capitalized costs, gross	$ 0.1	$ 0.7

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Operating Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Eversource - Cost of Natural Gas	$ 1,010.2	$ 718.6	$ 464.2

XML

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of AFUDC and Weighted Average AFUDC (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Other Operating Costs and Expense [Line Items]
Borrowed Funds	$ 21.8	$ 18.4	$ 23.7
Equity Funds	47.3	37.3	42.0
Total AFUDC	$ 69.1	$ 55.7	$ 65.7
Average AFUDC Rate (in percent)	4.70%	4.20%	5.00%
CL&P
Components of Other Operating Costs and Expense [Line Items]
Borrowed Funds	$ 4.8	$ 2.9	$ 6.6
Equity Funds	13.6	7.7	13.8
Total AFUDC	$ 18.4	$ 10.6	$ 20.4
Average AFUDC Rate (in percent)	6.60%	5.00%	5.90%
NSTAR Electric
Components of Other Operating Costs and Expense [Line Items]
Borrowed Funds	$ 10.7	$ 9.0	$ 9.1
Equity Funds	24.6	20.4	21.5
Total AFUDC	$ 35.3	$ 29.4	$ 30.6
Average AFUDC Rate (in percent)	5.40%	4.90%	5.70%
PSNH
Components of Other Operating Costs and Expense [Line Items]
Borrowed Funds	$ 1.4	$ 0.8	$ 2.1
Equity Funds	2.5	1.6	4.2
Total AFUDC	$ 3.9	$ 2.4	$ 6.3
Average AFUDC Rate (in percent)	2.60%	2.50%	4.70%

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary of Accounting Policies [Line Items]
Other Income, Net	$ 346,088	$ 161,282	$ 108,590
Unrealized gain associated with investment	22,900	14,200	14,200
Renewable Energy Fund
Summary of Accounting Policies [Line Items]
Other-than-temporary impairment		2,800	2,800
Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other Income, Net	219,800	84,400	44,400
AFUDC Equity
Summary of Accounting Policies [Line Items]
Other Income, Net	47,300	37,300	42,000
Equity in Earnings of Unconsolidated Affiliates
Summary of Accounting Policies [Line Items]
Other Income, Net	22,900	14,200	14,200
Unrealized gain associated with investment	12,200	2,100	2,400
Investment (Loss)/Income
Summary of Accounting Policies [Line Items]
Other Income, Net	1,900	(200)	1,100
Interest Income
Summary of Accounting Policies [Line Items]
Other Income, Net	50,500	25,600	4,800
Other
Summary of Accounting Policies [Line Items]
Other Income, Net	1,100	(100)	300
Gain on Sale of Property
Summary of Accounting Policies [Line Items]
Other Income, Net	2,600	100	1,800
CL&P
Summary of Accounting Policies [Line Items]
Other Income, Net	83,252	30,187	20,774
CL&P | Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other Income, Net	64,400	15,200	3,800
CL&P | AFUDC Equity
Summary of Accounting Policies [Line Items]
Other Income, Net	13,600	7,700	13,800
CL&P | Investment (Loss)/Income
Summary of Accounting Policies [Line Items]
Other Income, Net	(1,300)	1,300	1,100
CL&P | Interest Income
Summary of Accounting Policies [Line Items]
Other Income, Net	6,500	5,900	2,000
CL&P | Other
Summary of Accounting Policies [Line Items]
Other Income, Net	100	100	100
NSTAR Electric
Summary of Accounting Policies [Line Items]
Other Income, Net	142,661	74,844	52,017
NSTAR Electric | Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other Income, Net	85,500	40,200	29,300
NSTAR Electric | AFUDC Equity
Summary of Accounting Policies [Line Items]
Other Income, Net	24,600	20,400	21,500
NSTAR Electric | Investment (Loss)/Income
Summary of Accounting Policies [Line Items]
Other Income, Net	1,200	100	(800)
NSTAR Electric | Interest Income
Summary of Accounting Policies [Line Items]
Other Income, Net	30,700	13,400	900
NSTAR Electric | Other
Summary of Accounting Policies [Line Items]
Other Income, Net	700	700	1,100
PSNH
Summary of Accounting Policies [Line Items]
Other Income, Net	32,666	14,565	13,786
PSNH | Pension, SERP and PBOP Non-Service Income Components, Net of Deferred Portion
Summary of Accounting Policies [Line Items]
Other Income, Net	26,800	10,300	7,000
PSNH | AFUDC Equity
Summary of Accounting Policies [Line Items]
Other Income, Net	2,500	1,600	4,200
PSNH | Investment (Loss)/Income
Summary of Accounting Policies [Line Items]
Other Income, Net	200	100	100
PSNH | Interest Income
Summary of Accounting Policies [Line Items]
Other Income, Net	3,100	2,400	2,400
PSNH | Other
Summary of Accounting Policies [Line Items]
Other Income, Net	$ 100	$ 200	$ 100

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Other Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Summary of Accounting Policies [Line Items]
Excise and sales taxes	$ 194.7	$ 181.9	$ 170.6
CL&P
Summary of Accounting Policies [Line Items]
Excise and sales taxes	$ 166.1	$ 158.1	$ 149.9

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	$ 636.2	$ 568.7	$ 518.0
Income Taxes	77.9	121.6	48.9
Non-Cash Investing Activities:
Plant Additions Included in Accounts Payable (As of)	586.9	467.9	367.2
CL&P
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	167.2	161.5	149.0
Income Taxes	117.6	38.4	10.9
Non-Cash Investing Activities:
Plant Additions Included in Accounts Payable (As of)	131.8	110.6	101.8
NSTAR Electric
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	152.8	141.6	129.4
Income Taxes	23.8	74.2	110.7
Non-Cash Investing Activities:
Plant Additions Included in Accounts Payable (As of)	184.3	120.0	103.2
PSNH
Cash Paid During the Year for:
Interest, Net of Amounts Capitalized	58.3	56.5	54.5
Income Taxes	58.3	51.1	34.2
Non-Cash Investing Activities:
Plant Additions Included in Accounts Payable (As of)	$ 76.2	$ 68.7	$ 33.3

XML

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Cash and Cash Equivalents (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and Cash Equivalents as reported on the Balance Sheets	$ 374,600	$ 66,800
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	521,752	221,008	$ 264,950	$ 117,063
CL&P
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and Cash Equivalents as reported on the Balance Sheets	11,300	55,800
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	20,327	74,788	99,809	4,971
NSTAR Electric
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and Cash Equivalents as reported on the Balance Sheets	327,700	700
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	345,293	18,179	17,410	6,312
PSNH
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and Cash Equivalents as reported on the Balance Sheets	100	0
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	36,812	35,126	$ 39,555	$ 36,688
Special Deposits
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	102,200	78,200
Special Deposits | CL&P
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	8,800	18,700
Special Deposits | NSTAR Electric
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	17,500	17,400
Special Deposits | PSNH
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	33,100	31,400
Marketable Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	25,400	31,300
Marketable Securities | CL&P
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	200	300
Marketable Securities | NSTAR Electric
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	100	100
Marketable Securities | PSNH
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	400	500
Other Long-Term Assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	19,600	44,700
Other Long-Term Assets | CL&P
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	0
Other Long-Term Assets | NSTAR Electric
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	0
Other Long-Term Assets | PSNH
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 3,200	$ 3,200

XML

REGULATORY ACCOUNTING - Components of Regulatory Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Regulatory Assets [Line Items]
Total Regulatory Assets	$ 5,578,300	$ 5,715,800
Less:  Current Portion	1,335,491	1,129,093
Total Long-Term Regulatory Assets	4,242,794	4,586,709
Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	921,700	1,481,000
Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	1,379,100	1,102,700
Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	1,075,300	1,050,500
Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	853,300	790,700
Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	435,700	478,900
Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	281,000	297,800
Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	181,800	249,200
Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	127,900	115,000
Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	322,500	150,000
CL&P
Regulatory Assets [Line Items]
Total Regulatory Assets	1,907,800	2,084,800
Less:  Current Portion	314,089	371,609
Total Long-Term Regulatory Assets	1,593,693	1,713,161
CL&P | Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	156,700	272,400
CL&P | Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	799,300	695,600
CL&P | Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	216,800	333,600
CL&P | Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	491,100	470,500
CL&P | Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
CL&P | Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
CL&P | Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	181,800	249,200
CL&P | Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	35,900	33,600
CL&P | Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	26,200	29,900
NSTAR Electric
Regulatory Assets [Line Items]
Total Regulatory Assets	1,714,400	1,579,200
Less:  Current Portion	492,759	443,956
Total Long-Term Regulatory Assets	1,221,619	1,135,231
NSTAR Electric | Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	299,500	395,500
NSTAR Electric | Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	484,400	341,300
NSTAR Electric | Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	391,500	376,600
NSTAR Electric | Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	115,600	112,600
NSTAR Electric | Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
NSTAR Electric | Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	241,200	255,700
NSTAR Electric | Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
NSTAR Electric | Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	68,200	59,800
NSTAR Electric | Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	114,000	37,700
PSNH
Regulatory Assets [Line Items]
Total Regulatory Assets	696,200	786,400
Less:  Current Portion	102,240	107,169
Total Long-Term Regulatory Assets	593,974	679,182
PSNH | Benefit Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	56,600	118,900
PSNH | Storm Costs, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	95,400	65,800
PSNH | Regulatory Tracking Mechanisms
Regulatory Assets [Line Items]
Total Regulatory Assets	73,700	85,400
PSNH | Income Taxes, Net
Regulatory Assets [Line Items]
Total Regulatory Assets	16,000	17,500
PSNH | Securitized Stranded Costs
Regulatory Assets [Line Items]
Total Regulatory Assets	435,700	478,900
PSNH | Goodwill-related
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
PSNH | Derivative Liabilities
Regulatory Assets [Line Items]
Total Regulatory Assets	0	0
PSNH | Asset Retirement Obligations
Regulatory Assets [Line Items]
Total Regulatory Assets	4,400	4,100
PSNH | Other Regulatory Assets
Regulatory Assets [Line Items]
Total Regulatory Assets	$ 14,400	$ 15,800

XML

REGULATORY ACCOUNTING - Narrative (Details)			4 Months Ended	12 Months Ended
	Jan. 01, 2023 USD ($)	Nov. 01, 2022 USD ($)	Apr. 30, 2023 USD ($)	Dec. 31, 2022 USD ($) storm	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2022 USD ($)	Oct. 01, 2021 USD ($)	May 06, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2019 USD ($)	May 31, 2018 USD ($)
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				$ 210,800,000	$ 252,500,000
Deferred costs related to uncollectible expense				29,800,000	33,000,000
Regulatory Liabilities				890,786,000	602,432,000
Gain (loss) related to litigation settlement				72,041,000	(81,274,000)	$ 0
Regulatory assets				5,578,300,000	5,715,800,000
Increase (decrease) in regulatory assets				205,294,000	314,211,000	516,411,000
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows				521,752,000	221,008,000	264,950,000					$ 117,063,000
FERC ROE Complaints
Regulatory Assets [Line Items]
Cumulative pre-tax reserves which include impact of refunds given to customers				39,100,000
Unfavorable Regulatory Action
Regulatory Assets [Line Items]
Gain (loss) related to litigation settlement				(103,600,000)
Unfavorable Regulatory Action | Oil and Gas, Operation and Maintenance
Regulatory Assets [Line Items]
Gain (loss) related to litigation settlement				(10,000,000)
Deferred Pre-Staging And Storm Restoration Costs
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				399,000,000
Deferred Storm Restoration Costs
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				$ 1,400,000,000
Goodwill-related
Regulatory Assets [Line Items]
Recovery period (in years)				40 years
Remaining amortization (in years)				17 years
Regulatory assets				$ 281,000,000.0	297,800,000
Storm Costs, Net
Regulatory Assets [Line Items]
Regulatory assets				1,379,100,000	1,102,700,000
PSNH
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				1,000,000	3,400,000
Equity return not recorded on the balance sheet				4,100,000	5,000,000
Regulatory Liabilities				161,963,000	120,176,000
Regulatory assets				696,200,000	786,400,000
Increase (decrease) in regulatory assets				(53,181,000)	(32,587,000)	45,830,000
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows				36,812,000	35,126,000	39,555,000					36,688,000
PSNH | FERC ROE Complaints
Regulatory Assets [Line Items]
Cumulative pre-tax reserves which include impact of refunds given to customers				3,100,000
PSNH | Deferred Pre-Staging And Storm Restoration Costs
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				55,000,000
PSNH | Deferred Storm Restoration Costs
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				98,000,000
PSNH | Goodwill-related
Regulatory Assets [Line Items]
Regulatory assets				0	0
PSNH | Storm Costs, Net
Regulatory Assets [Line Items]
Regulatory assets				95,400,000	65,800,000
CL&P
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				135,900,000	114,900,000
Deferred costs related to uncollectible expense				11,800,000	18,000,000
Regulatory Liabilities				336,048,000	266,489,000
Gain (loss) related to litigation settlement				72,041,000	(81,274,000)	0
Regulatory assets				1,907,800,000	2,084,800,000
Increase (decrease) in regulatory assets				144,793,000	152,775,000	279,941,000
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows				20,327,000	74,788,000	99,809,000					4,971,000
CL&P | Energy Assistance Program
Regulatory Assets [Line Items]
Restricted cash				10,000,000
CL&P | Customer Assistance Fund
Regulatory Assets [Line Items]
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows							$ 10,000,000
CL&P | Forecast
Regulatory Assets [Line Items]
Average monthly bill			$ 10
Public utilities, approved rate increase (decrease), net revenues generated			$ 90,000,000
CL&P | FERC ROE Complaints
Regulatory Assets [Line Items]
Cumulative pre-tax reserves which include impact of refunds given to customers				21,400,000
CL&P | Unfavorable Regulatory Action
Regulatory Assets [Line Items]
Loss contingency, estimate of possible earnings impact, non-compliance with performance standards									$ 28,400,000	$ 28,400,000
Period credits are issued to customers (in years)									1 year
Regulatory Liabilities				75,000,000	75,000,000
Customer credits								$ 65,000,000
Customer assistance initiatives								$ 10,000,000
CL&P | Unfavorable Regulatory Action | Oil and Gas, Operation and Maintenance
Regulatory Assets [Line Items]
Gain (loss) related to litigation settlement				(10,000,000)
CL&P | Deferred Pre-Staging And Storm Restoration Costs
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				163,000,000
CL&P | Deferred Storm Restoration Costs
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				807,000,000
CL&P | Deferred Storm Restoration Costs | Tropical Storm Isaias
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				235,000,000
CL&P | Goodwill-related
Regulatory Assets [Line Items]
Regulatory assets				0	0
CL&P | Storm Costs, Net
Regulatory Assets [Line Items]
Regulatory assets				799,300,000	695,600,000
NSTAR Electric
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				19,800,000	85,000,000
Deferred costs related to uncollectible expense				2,200,000	6,100,000
Regulatory Liabilities				$ 373,221,000	228,248,000
Renewal term of performance-based ratemaking plan (in years)				5 years
Extension period (in years)				5 years
Historical average term of capital additions (in years)				5 years
Authorized regulatory ROE (in percent)				9.80%
Authorized common equity ratio (in percent)				53.20%
Regulatory assets				$ 1,714,400,000	1,579,200,000
Increase (decrease) in regulatory assets				$ 88,220,000	79,075,000	186,081,000
Storms in a calendar year | storm				8
Storms recovered at base rate | storm				6
Number of additional storms | storm				2
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows				$ 345,293,000	18,179,000	$ 17,410,000					$ 6,312,000
NSTAR Electric | Subsequent Event
Regulatory Assets [Line Items]
Rate increase approved	$ 64,000,000
NSTAR Electric | FERC ROE Complaints
Regulatory Assets [Line Items]
Cumulative pre-tax reserves which include impact of refunds given to customers				14,600,000
NSTAR Electric | Deferred Pre-Staging And Storm Restoration Costs
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				181,000,000
NSTAR Electric | Deferred Storm Restoration Costs
Regulatory Assets [Line Items]
Amount of regulatory costs not yet approved				492,000,000
NSTAR Electric | Goodwill-related
Regulatory Assets [Line Items]
Regulatory assets				241,200,000	255,700,000
NSTAR Electric | Storm Costs, Net
Regulatory Assets [Line Items]
Regulatory assets				484,400,000	$ 341,300,000
NSTAR Electric | Storm Fund Contribution
Regulatory Assets [Line Items]
Regulatory assets				10,000,000
Increase (decrease) in regulatory assets				31,000,000
NSTAR Electric | Storm Threshold Costs
Regulatory Assets [Line Items]
Regulatory assets				1,300,000
NSTAR Electric | Recovery of Storm Costs | Subsequent Event
Regulatory Assets [Line Items]
Regulatory assets	$ 162,100,000
Recovery period of regulatory asset (in years)	5 years
NSTAR Electric | Recovery of exogenous storms
Regulatory Assets [Line Items]
Regulatory assets				$ 220,900,000
Recovery period of regulatory asset (in years)				5 years
NSTAR Electric | Recovery of historical exogenous property taxes from 2020 - 2022 | Subsequent Event
Regulatory Assets [Line Items]
Regulatory assets	$ 30,800,000
Recovery period of regulatory asset (in years)	2 years
NSTAR Electric | Recovery of historical exogenous property taxes from 2012 - 2015 | Subsequent Event
Regulatory Assets [Line Items]
Regulatory assets	$ 8,300,000
Recovery period of regulatory asset (in years)	5 years
NSTAR Gas
Regulatory Assets [Line Items]
Rate increase approved		$ 21,700,000
NSTAR Gas | Exogenous Property Taxes
Regulatory Assets [Line Items]
Rate increase approved		4,500,000
NSTAR Gas | Mitigation Plan
Regulatory Assets [Line Items]
Rate increase approved		5,400,000
NSTAR Gas | Recovery of Exogenous Property Taxes
Regulatory Assets [Line Items]
Regulatory assets		$ 8,200,000
Recovery period of regulatory asset (in years)		2 years
EGMA
Regulatory Assets [Line Items]
Rate increase approved		$ 6,700,000
EGMA | Tax Act Credit Factor
Regulatory Assets [Line Items]
Rate increase approved		3,300,000
EGMA | Recovery of Exogenous Property Taxes
Regulatory Assets [Line Items]
Regulatory assets		$ 8,600,000
Recovery period of regulatory asset (in years)		2 years
Rate Reduction Bonds | PSNH
Regulatory Assets [Line Items]
Amount of securitized rate reduction bonds issued												$ 635,700,000

XML

REGULATORY ACCOUNTING - Components of Regulatory Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	$ 4,821,100	$ 4,468,700
Less:  Current Portion	890,786	602,432
Total Long-Term Regulatory Liabilities	3,930,305	3,866,251
EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	2,619,300	2,685,200
Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	670,600	649,600
Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	890,800	448,400
Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	270,900	148,300
Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	55,400	133,500
AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	98,200	81,000
CL&P Settlement Agreement and Storm Performance Penalty
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	81,300
Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	215,900	241,400
CL&P
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	1,599,400	1,459,800
Less:  Current Portion	336,048	266,489
Total Long-Term Regulatory Liabilities	1,263,396	1,193,259
CL&P | EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	983,600	996,100
CL&P | Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	130,800	100,100
CL&P | Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	361,000	182,000
CL&P | Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	34,500	12,000
CL&P | Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	700	0
CL&P | AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	48,200	43,200
CL&P | CL&P Settlement Agreement and Storm Performance Penalty
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	81,300
CL&P | Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	40,600	45,100
NSTAR Electric
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	1,921,300	1,787,300
Less:  Current Portion	373,221	228,248
Total Long-Term Regulatory Liabilities	1,548,081	1,559,072
NSTAR Electric | EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	944,300	984,500
NSTAR Electric | Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	405,300	381,000
NSTAR Electric | Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	336,100	185,100
NSTAR Electric | Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	139,700	90,700
NSTAR Electric | Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	31,400	107,400
NSTAR Electric | AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	50,000	37,800
NSTAR Electric | CL&P Settlement Agreement and Storm Performance Penalty
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
NSTAR Electric | Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	14,500	800
PSNH
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	553,600	501,600
Less:  Current Portion	161,963	120,176
Total Long-Term Regulatory Liabilities	391,628	381,366
PSNH | EDIT due to Tax Cuts and Jobs Act of 2017
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	348,600	359,200
PSNH | Cost of Removal
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	14,700	17,200
PSNH | Regulatory Tracking Mechanisms
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	155,000	107,000
PSNH | Deferred Portion of Non-Service Income Components of Pension, SERP and PBOP
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	28,800	14,900
PSNH | Benefit Costs
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
PSNH | AFUDC - Transmission
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
PSNH | CL&P Settlement Agreement and Storm Performance Penalty
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	0	0
PSNH | Other Regulatory Liabilities
Regulatory Liabilities [Line Items]
Total Regulatory Liabilities	$ 6,500	$ 3,300

XML

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION - Investment in Utility Property, Plant and Equipment By Asset (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Distribution - Electric	$ 18,326,200	$ 17,679,100
Distribution - Natural Gas	7,443,800	6,694,800
Transmission - Electric	13,709,300	12,882,400
Distribution - Water	2,112,600	1,900,900
Solar	200,800	200,900
Utility	41,792,700	39,358,100
Other	1,738,100	1,469,500
Property, Plant and Equipment, Gross	43,530,800	40,827,600
Less:  Accumulated Depreciation
Utility	(9,167,400)	(8,885,200)
Other	(706,100)	(580,100)
Total Accumulated Depreciation	(9,873,500)	(9,465,300)
Property, Plant and Equipment, Net	33,657,300	31,362,300
Construction Work in Progress	2,455,500	2,015,400
Total Property, Plant and Equipment, Net	36,112,820	33,377,650
CL&P
Property, Plant and Equipment [Line Items]
Distribution - Electric	7,370,100	7,117,600
Transmission - Electric	6,165,100	5,859,000
Solar	0	0
Property, Plant and Equipment, Gross	13,535,200	12,976,600
Less:  Accumulated Depreciation
Total Accumulated Depreciation	(2,567,100)	(2,572,100)
Property, Plant and Equipment, Net	10,968,100	10,404,500
Construction Work in Progress	498,900	399,000
Total Property, Plant and Equipment, Net	11,467,024	10,803,543
NSTAR Electric
Property, Plant and Equipment [Line Items]
Distribution - Electric	8,410,000	8,105,500
Transmission - Electric	5,333,800	5,090,500
Solar	200,800	200,900
Property, Plant and Equipment, Gross	13,944,600	13,396,900
Less:  Accumulated Depreciation
Total Accumulated Depreciation	(3,381,200)	(3,227,300)
Property, Plant and Equipment, Net	10,563,400	10,169,600
Construction Work in Progress	1,063,600	707,000
Total Property, Plant and Equipment, Net	11,626,968	10,876,614
PSNH
Property, Plant and Equipment [Line Items]
Distribution - Electric	2,586,400	2,496,200
Transmission - Electric	2,212,000	1,934,600
Solar	0	0
Property, Plant and Equipment, Gross	4,798,400	4,430,800
Less:  Accumulated Depreciation
Total Accumulated Depreciation	(912,300)	(908,400)
Property, Plant and Equipment, Net	3,886,100	3,522,400
Construction Work in Progress	174,100	134,100
Total Property, Plant and Equipment, Net	$ 4,060,224	$ 3,656,462

XML

PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION - Schedule of Aggregate Composite Depreciation Rates (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Composite depreciation rate for plant in service (in percent)	3.00%	3.10%	3.00%
CL&P
Property, Plant and Equipment [Line Items]
Composite depreciation rate for plant in service (in percent)	2.80%	2.80%	2.80%
NSTAR Electric
Property, Plant and Equipment [Line Items]
Composite depreciation rate for plant in service (in percent)	2.70%	2.80%	2.80%
PSNH
Property, Plant and Equipment [Line Items]
Composite depreciation rate for plant in service (in percent)	3.00%	3.10%	2.80%

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PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION - Schedule of Average Remaining Useful Lives of Depreciable Assets (Details)	12 Months Ended
	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Distribution - Electric	34 years 2 months 12 days
Distribution - Natural Gas	37 years 4 months 24 days
Transmission - Electric	39 years 9 months 18 days
Distribution - Water	39 years
Solar	22 years 10 months 24 days
Other	11 years
Computer Software, Hardware and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life of property, plant and equipment	5 years
Computer Software, Hardware and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life of property, plant and equipment	15 years
Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life of property, plant and equipment	40 years
CL&P
Property, Plant and Equipment [Line Items]
Distribution - Electric	35 years
Transmission - Electric	36 years 3 months 18 days
NSTAR Electric
Property, Plant and Equipment [Line Items]
Distribution - Electric	34 years 7 months 6 days
Transmission - Electric	45 years 2 months 12 days
Solar	22 years 10 months 24 days
PSNH
Property, Plant and Equipment [Line Items]
Distribution - Electric	30 years 9 months 18 days
Transmission - Electric	39 years 3 months 18 days

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DERIVATIVE INSTRUMENTS - Schedule of Gross Fair Value of Contracts (Details) - CL&P - Level 3 - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current Derivative Assets
Current and Long-Term Derivative Assets
Commodity Supply and Price Risk Management	$ 16.3	$ 14.7
Netting	(0.5)	(1.0)
Net Amount Recorded as a Derivative	15.8	13.7
Long-Term Derivative Assets
Current and Long-Term Derivative Assets
Commodity Supply and Price Risk Management	28.8	46.9
Netting	(0.9)	(0.9)
Net Amount Recorded as a Derivative	27.9	46.0
Current Derivative Liabilities
Current and Long-Term Derivative Liabilities
Commodity Supply and Price Risk Management	(81.6)	(73.5)
Netting	0.0	0.0
Net Amount Recorded as a Derivative	(81.6)	(73.5)
Long-Term Derivative Liabilities
Current and Long-Term Derivative Liabilities
Commodity Supply and Price Risk Management	(143.9)	(235.4)
Netting	0.0	0.0
Net Amount Recorded as a Derivative	$ (143.9)	$ (235.4)

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DERIVATIVE INSTRUMENTS - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) MW	Dec. 31, 2021 USD ($) $ / KWmo MW	Dec. 31, 2020 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of costs or benefits borne under capacity-related contracts by United Illuminated Company (as a percentage)	20.00%
Amount of power to be purchased under capacity-related contract (up to) (in MW) | MW	674	675
Gain (loss) on deferred regulatory costs | $	$ 10.1	$ (7.1)	$ (21.2)
CL&P
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of costs or benefits borne under capacity-related contracts (as a percentage)	80.00%
Minimum | Level 3
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of exit price premiums related to derivative contracts	2.90%
Average | CL&P | Measurement Input, Capacity Prices
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative measurement input | $ / KWmo		2.61
Average | Level 3
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of exit price premiums related to derivative contracts	6.10%
Maximum | Level 3
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Percentage of exit price premiums related to derivative contracts	7.10%

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DERIVATIVE INSTRUMENTS - Unobservable Inputs Utilized (Details) - Forward Reserve Prices - CL&P - Level 3 - $ / KWmo	Dec. 31, 2022	Dec. 31, 2021
Minimum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative measurement input	0.44	0.50
Maximum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative measurement input	0.50	1.15
Average
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative measurement input	0.47	0.82

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DERIVATIVE INSTRUMENTS - Variations Using Significant unobservable Inputs (Details) - Level 3 - CL&P - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair Value as of Beginning of Period	$ (249.2)	$ (293.1)
Net Realized/Unrealized Gains/(Losses) Included in Regulatory Assets	10.1	(8.5)
Settlements	57.3	52.4
Fair Value as of End of Period	$ (181.8)	$ (249.2)

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MARKETABLE SECURITIES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 20.0	$ 40.2
Unrealized losses recorded in other income	9.7
Unrealized gains recorded in other income		4.4	$ 3.7
CYAPC and YAEC
Debt Securities, Available-for-sale [Line Items]
Equity securities	170.1	214.0
Marketable securities held in nuclear decommissioning trusts	$ 163.2	$ 189.9

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MARKETABLE SECURITIES - Available-for-Sale Debt Securities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Amortized Cost	$ 201.6	$ 214.5
Pre-Tax Unrealized Gains	0.1	5.1
Pre-Tax Unrealized Losses	(16.2)	(0.2)
Fair Value	$ 185.5	$ 219.4

XML

MARKETABLE SECURITIES - Contractual Maturity (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Amortized Cost
Less than one year	$ 28.5
One to five years	43.8
Six to ten years	35.6
Greater than ten years	93.7
Amortized Cost	201.6	$ 214.5
Fair Value
Less than one year	28.3
One to five years	42.4
Six to ten years	32.3
Greater than ten years	82.5
Total Debt Securities	$ 185.5	$ 219.4

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MARKETABLE SECURITIES - Fair Value Measurement (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	$ 375.6	$ 473.6
Level 1
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	215.5	285.5
Level 1 | Mutual Funds and Equities
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	190.1	254.2
Level 1 | Money Market Funds
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	25.4	31.3
Level 2
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	160.1	188.1
Level 2 | U.S. Government Issued Debt Securities (Agency and Treasury)
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	82.3	81.3
Level 2 | Corporate Debt Securities
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	46.1	65.3
Level 2 | Asset-Backed Debt Securities
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	8.6	12.6
Level 2 | Municipal Bonds
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	12.7	12.3
Level 2 | Other Fixed Income Securities
Debt and Equity Securities, FV-NI [Line Items]
Total Marketable Securities	$ 10.4	$ 16.6

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INVESTMENTS IN UNCONSOLIDATED AFFILIATES - Summary of Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 2,176,080	$ 1,436,293
Offshore Wind Business - North East Offshore
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	50.00%
Investments in unconsolidated affiliates	$ 1,947,100	1,213,600
Natural Gas Pipeline - Algonquin Gas Transmission, LLC
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	15.00%
Investments in unconsolidated affiliates	$ 118,800	121,900
Renewable Energy Investment Fund
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	90.00%
Investments in unconsolidated affiliates	$ 84,100	76,500
Other
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated affiliates	$ 26,100	$ 24,300

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INVESTMENTS IN UNCONSOLIDATED AFFILIATES - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) company project	Dec. 31, 2021 USD ($) company	Dec. 31, 2020 USD ($)
Schedule of Equity Method Investments [Line Items]
Equity in earnings of unconsolidated affiliates, net of impairment	$ 22,900	$ 14,200	$ 14,200
Dividends received from equity method investees	$ 26,200	$ 21,600	21,800
Number of offshore wind projects | project	3
Number of companies that transmit hydro electricity imported from The Hydro-Quebec System in Canada | company	2	2
Payments to acquire investments	$ 742,496	$ 327,385	239,673
Offshore Wind Business - North East Offshore
Schedule of Equity Method Investments [Line Items]
Carrying amount of equity method investments in excess of the underlying equity in net assets	343,100	$ 300,400
Goodwill	$ 168,900
Ownership interest (in percent)	50.00%
Revolution Wind And South Fork Wind
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	50.00%
Hydro-Quebec System
Schedule of Equity Method Investments [Line Items]
Ownership interest (in percent)	14.50%	14.50%
Payments to acquire investments	$ 9,300	$ 9,000
Renewable Energy Fund
Schedule of Equity Method Investments [Line Items]
Other-than-temporary impairment		$ 2,800	$ 2,800

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ASSET RETIREMENT OBLIGATIONS - Schedule of Reconciliation of Beginning and Ending Balance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance as of Beginning of Year	$ 500.1	$ 499.7
Liabilities Settled During the Year	(22.3)	(23.9)
Accretion	28.9	29.4
Revisions in Estimated Cash Flows	(4.0)	(5.1)
Balance as of End of Year	502.7	500.1
CL&P
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance as of Beginning of Year	35.0	33.4
Liabilities Settled During the Year	0.0	(0.6)
Accretion	2.4	2.2
Revisions in Estimated Cash Flows	0.0	0.0
Balance as of End of Year	37.4	35.0
NSTAR Electric
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance as of Beginning of Year	97.5	91.8
Liabilities Settled During the Year	0.0	0.0
Accretion	4.1	4.0
Revisions in Estimated Cash Flows	(0.3)	1.7
Balance as of End of Year	101.3	97.5
PSNH
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance as of Beginning of Year	4.7	4.4
Liabilities Settled During the Year	0.0	0.0
Accretion	0.2	0.3
Revisions in Estimated Cash Flows	0.0	0.0
Balance as of End of Year	$ 4.9	$ 4.7

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ASSET RETIREMENT OBLIGATIONS - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Asset Retirement Obligation [Line Items]
Asset retirement obligations	$ 502.7	$ 500.1	$ 499.7
CYAPC and YAEC
Schedule of Asset Retirement Obligation [Line Items]
Asset retirement obligations	$ 320.5	$ 325.9

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SHORT-TERM DEBT - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 03, 2021
Commercial Paper | Eversource
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 2,000,000,000
Line of Credit
Short-term Debt [Line Items]
Amount outstanding during period	0	$ 0
Line of Credit | Eversource
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 2,000,000,000
Debt instrument term (in years)	5 years
CL&P
Short-term Debt [Line Items]
Short-term borrowing limit approved by regulatory agency			$ 600,000,000
CL&P | Unsecured Debt
Short-term Debt [Line Items]
Period of maturity restricting provisions of debt	10 years
Total capitalization (as a percentage)	10.00%
Capacity available under preferred stock provisions	$ 1,010,000,000.00
CL&P | Line of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity	450,000,000
Borrowings outstanding	0
NSTAR Electric
Short-term Debt [Line Items]
Short-term borrowing limit approved by regulatory agency			$ 655,000,000
NSTAR Electric | Commercial Paper
Short-term Debt [Line Items]
Maximum borrowing capacity	650,000,000
NSTAR Electric | Line of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 650,000,000
Debt instrument term (in years)	5 years
PSNH
Short-term Debt [Line Items]
Short-term borrowing limit approved by regulatory agency	$ 443,500,000
Notes payable to related parties	$ 173,300,000	$ 110,600,000
PSNH | Short Term Debt Authorization Calculation
Short-term Debt [Line Items]
Interest rate	10.00%
Short-term debt borrowing calculation approved by regulatory agency	$ 60,000,000
PSNH | Line of Credit
Short-term Debt [Line Items]
Maximum borrowing capacity	$ 300,000,000

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SHORT-TERM DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Borrowings Outstanding	$ 1,442,200	$ 1,505,450
Eversource Parent Commercial Paper Program
Line of Credit Facility [Line Items]
Borrowings Outstanding	1,442,200	1,342,950
Commercial Paper | Eversource Parent Commercial Paper Program
Line of Credit Facility [Line Items]
Borrowings Outstanding	1,442,200	1,343,000
Available Borrowing Capacity	$ 557,800	$ 657,000
Weighted-Average Interest Rate (as a percentage)	4.63%	0.31%
Commercial Paper | NSTAR Electric
Line of Credit Facility [Line Items]
Borrowings Outstanding	$ 0	$ 162,500
Available Borrowing Capacity	$ 650,000	$ 487,500
Weighted-Average Interest Rate (as a percentage)	0.00%	0.14%

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LONG-TERM DEBT - Schedule of Long-Term Debt Outstanding (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-Term Debt	$ 19,723,994	$ 17,023,577
Long-Term Debt – Current Portion	1,320,129	1,193,097
Senior Notes
Debt Instrument [Line Items]
Unamortized Premiums and Discounts, Net	40,100	43,400
Unamortized Debt Issuance Costs	(49,400)	(36,300)
Long-Term Debt	19,724,000	17,023,600
Pre-1983 Spent Nuclear Fuel Obligation (CYAPC)
Debt Instrument [Line Items]
Long-Term Debt	11,900	11,700
Fair Value Adjustment
Debt Instrument [Line Items]
Long-Term Debt	26,200	43,800
Fair Value Adjustment - Current Portion
Debt Instrument [Line Items]
Long-Term Debt	(7,000)	(17,700)
Loans Payable
Debt Instrument [Line Items]
Long-Term Debt – Current Portion	1,203,400	775,400
Total Other Long-Term Debt
Debt Instrument [Line Items]
Long-Term Debt	10,027,500	8,059,000
Eversource
Debt Instrument [Line Items]
Long-Term Debt	6,972,804	5,395,840
Long-Term Debt – Current Portion	1,207,047	767,681
Eversource | Unsecured Debt | Eversource Parent - Senior Notes due 2023 - 2050
Debt Instrument [Line Items]
Long-Term Debt	$ 8,150,000	6,100,000
Eversource | Unsecured Debt | Eversource Parent - Senior Notes due 2023 - 2050 | Minimum
Debt Instrument [Line Items]
Interest rate	0.80%
Eversource | Unsecured Debt | Eversource Parent - Senior Notes due 2023 - 2050 | Maximum
Debt Instrument [Line Items]
Interest rate	4.60%
CL&P
Debt Instrument [Line Items]
Long-Term Debt	$ 4,216,488	4,215,379
Long-Term Debt – Current Portion	400,000	0
CL&P | First Mortgage Bonds
Debt Instrument [Line Items]
Long-Term Debt	4,219,800	4,219,800
Unamortized Premiums and Discounts, Net	21,500	23,100
Unamortized Debt Issuance Costs	(24,800)	(27,500)
Long-Term Debt	$ 4,216,500	4,215,400
CL&P | First Mortgage Bonds | 1994 Series D due 2024
Debt Instrument [Line Items]
Interest rate	7.875%
Long-Term Debt	$ 139,800	139,800
CL&P | First Mortgage Bonds | 2004 Series B due 2034
Debt Instrument [Line Items]
Interest rate	5.75%
Long-Term Debt	$ 130,000	130,000
CL&P | First Mortgage Bonds | 2005 Series B due 2035
Debt Instrument [Line Items]
Interest rate	5.625%
Long-Term Debt	$ 100,000	100,000
CL&P | First Mortgage Bonds | 2006 Series A due 2036
Debt Instrument [Line Items]
Interest rate	6.35%
Long-Term Debt	$ 250,000	250,000
CL&P | First Mortgage Bonds | 2007 Series B due 2037
Debt Instrument [Line Items]
Interest rate	5.75%
Long-Term Debt	$ 150,000	150,000
CL&P | First Mortgage Bonds | 2007 Series D due 2037
Debt Instrument [Line Items]
Interest rate	6.375%
Long-Term Debt	$ 100,000	100,000
CL&P | First Mortgage Bonds | 2013 Series A due 2023
Debt Instrument [Line Items]
Interest rate	2.50%
Long-Term Debt	$ 400,000	400,000
CL&P | First Mortgage Bonds | 2014 Series A due 2044
Debt Instrument [Line Items]
Interest rate	4.30%
Long-Term Debt	$ 475,000	475,000
CL&P | First Mortgage Bonds | 2015 Series A due 2045
Debt Instrument [Line Items]
Interest rate	4.15%
Long-Term Debt	$ 350,000	350,000
CL&P | First Mortgage Bonds | 2017 Series A due 2027
Debt Instrument [Line Items]
Interest rate	3.20%
Long-Term Debt	$ 500,000	500,000
CL&P | First Mortgage Bonds | 2018 Series A due 2048
Debt Instrument [Line Items]
Interest rate	4.00%
Long-Term Debt	$ 800,000	800,000
CL&P | First Mortgage Bonds | 2020 Series A due 2025
Debt Instrument [Line Items]
Interest rate	0.75%
Long-Term Debt	$ 400,000	400,000
CL&P | First Mortgage Bonds | 2021 Series A due 2031
Debt Instrument [Line Items]
Interest rate	2.05%
Long-Term Debt	$ 425,000	425,000
CL&P | Commercial Paper
Debt Instrument [Line Items]
Long-Term Debt	400,000
Long-Term Debt – Current Portion	400,000	0
NSTAR Electric
Debt Instrument [Line Items]
Long-Term Debt	4,345,085	3,585,399
Long-Term Debt – Current Portion	80,000	400,000
NSTAR Electric | Unsecured Debt
Debt Instrument [Line Items]
Long-Term Debt	4,250,000	3,800,000
Long-Term Debt – Current Portion	80,000	400,000
Unamortized Premiums and Discounts, Net	(14,800)	(11,200)
Unamortized Debt Issuance Costs	(30,100)	(23,400)
Long-Term Debt	$ 4,345,100	3,585,400
NSTAR Electric | Unsecured Debt | 2006 Debentures due 2036
Debt Instrument [Line Items]
Interest rate	5.75%
Long-Term Debt	$ 200,000	200,000
NSTAR Electric | Unsecured Debt | 2010 Debentures due 2040
Debt Instrument [Line Items]
Interest rate	5.50%
Long-Term Debt	$ 300,000	300,000
NSTAR Electric | Unsecured Debt | 2012 Debentures due 2022
Debt Instrument [Line Items]
Interest rate	2.375%
Long-Term Debt	$ 0	400,000
NSTAR Electric | Unsecured Debt | 2014 Debentures due 2044
Debt Instrument [Line Items]
Interest rate	4.40%
Long-Term Debt	$ 300,000	300,000
NSTAR Electric | Unsecured Debt | 2015 Debentures due 2025
Debt Instrument [Line Items]
Interest rate	3.25%
Long-Term Debt	$ 250,000	250,000
NSTAR Electric | Unsecured Debt | 2016 Debentures due 2026
Debt Instrument [Line Items]
Interest rate	2.70%
Long-Term Debt	$ 250,000	250,000
NSTAR Electric | Unsecured Debt | 2017 Debentures due 2027
Debt Instrument [Line Items]
Interest rate	3.20%
Long-Term Debt	$ 700,000	700,000
NSTAR Electric | Unsecured Debt | 2019 Debentures due 2029
Debt Instrument [Line Items]
Interest rate	3.25%
Long-Term Debt	$ 400,000	400,000
NSTAR Electric | Unsecured Debt | 2020 Debentures due 2030
Debt Instrument [Line Items]
Interest rate	3.95%
Long-Term Debt	$ 400,000	400,000
NSTAR Electric | Unsecured Debt | 2021 Debentures due 2051
Debt Instrument [Line Items]
Interest rate	3.10%
Long-Term Debt	$ 300,000	300,000
NSTAR Electric | Unsecured Debt | 2021 Debentures due 2031
Debt Instrument [Line Items]
Interest rate	1.95%
Long-Term Debt	$ 300,000	300,000
NSTAR Electric | Unsecured Debt | 2022 Debentures due 2052
Debt Instrument [Line Items]
Interest rate	4.55%
Long-Term Debt	$ 450,000	0
NSTAR Electric | Unsecured Debt | 2022 Debentures due 2052
Debt Instrument [Line Items]
Interest rate	4.95%
Long-Term Debt	$ 400,000	0
NSTAR Electric | Senior Notes
Debt Instrument [Line Items]
Long-Term Debt	$ 220,000	220,000
NSTAR Electric | Senior Notes | 2004 Senior Notes Series B due 2034
Debt Instrument [Line Items]
Interest rate	5.90%
Long-Term Debt	$ 50,000	50,000
NSTAR Electric | Senior Notes | 2007 Senior Notes Series D due 2037
Debt Instrument [Line Items]
Interest rate	6.70%
Long-Term Debt	$ 40,000	40,000
NSTAR Electric | Senior Notes | 2013 Senior Notes Series G due 2023
Debt Instrument [Line Items]
Interest rate	3.88%
Long-Term Debt	$ 80,000	80,000
NSTAR Electric | Senior Notes | 2016 Senior Notes Series H due 2026
Debt Instrument [Line Items]
Interest rate	2.75%
Long-Term Debt	$ 50,000	50,000
PSNH
Debt Instrument [Line Items]
Long-Term Debt	1,134,914	1,163,833
Long-Term Debt – Current Portion	29,668	0
PSNH | First Mortgage Bonds
Debt Instrument [Line Items]
Long-Term Debt	1,175,000	1,175,000
Long-Term Debt – Current Portion	325,000	0
Unamortized Premiums and Discounts, Net	(2,500)	(2,600)
Unamortized Debt Issuance Costs	(7,900)	(8,600)
Long-Term Debt	$ 1,134,900	1,163,800
PSNH | First Mortgage Bonds | 2005 Series M due 2035
Debt Instrument [Line Items]
Interest rate	5.60%
Long-Term Debt	$ 50,000	50,000
PSNH | First Mortgage Bonds | 2013 Series S due 2023
Debt Instrument [Line Items]
Interest rate	3.50%
Long-Term Debt	$ 325,000	325,000
PSNH | First Mortgage Bonds | 2019 Series T due 2049
Debt Instrument [Line Items]
Interest rate	3.60%
Long-Term Debt	$ 300,000	300,000
PSNH | First Mortgage Bonds | 2020 Series U due 2050
Debt Instrument [Line Items]
Interest rate	2.40%
Long-Term Debt	$ 150,000	150,000
PSNH | First Mortgage Bonds | 2021 Series V due 2031
Debt Instrument [Line Items]
Interest rate	2.20%
Long-Term Debt	$ 350,000	350,000
PSNH | Commercial Paper
Debt Instrument [Line Items]
Long-Term Debt	295,300
Long-Term Debt – Current Portion	295,300	0
Yankee Gas | First Mortgage Bonds | Yankee Gas - First Mortgage Bonds due 2024 - 2051
Debt Instrument [Line Items]
Long-Term Debt	$ 845,000	765,000
Yankee Gas | First Mortgage Bonds | Yankee Gas - First Mortgage Bonds due 2024 - 2051 | Minimum
Debt Instrument [Line Items]
Interest rate	1.38%
Yankee Gas | First Mortgage Bonds | Yankee Gas - First Mortgage Bonds due 2024 - 2051 | Maximum
Debt Instrument [Line Items]
Interest rate	5.35%
NSTAR Gas | First Mortgage Bonds | NSTAR Gas - First Mortgage Bonds due 2025 - 2051
Debt Instrument [Line Items]
Long-Term Debt	$ 705,000	580,000
NSTAR Gas | First Mortgage Bonds | NSTAR Gas - First Mortgage Bonds due 2025 - 2051 | Minimum
Debt Instrument [Line Items]
Interest rate	2.25%
NSTAR Gas | First Mortgage Bonds | NSTAR Gas - First Mortgage Bonds due 2025 - 2051 | Maximum
Debt Instrument [Line Items]
Interest rate	7.11%
EGMA | First Mortgage Bonds | EGMA - First Mortgage Bonds due 2031 - 2052
Debt Instrument [Line Items]
Long-Term Debt	$ 650,000	550,000
EGMA | First Mortgage Bonds | EGMA - First Mortgage Bonds due 2031 - 2052 | Minimum
Debt Instrument [Line Items]
Interest rate	2.11%
EGMA | First Mortgage Bonds | EGMA - First Mortgage Bonds due 2031 - 2052 | Maximum
Debt Instrument [Line Items]
Interest rate	4.70%
Aquarion | Unsecured Debt | Aquarion - Unsecured Notes due 2023 - 2052
Debt Instrument [Line Items]
Long-Term Debt	$ 464,700	394,900
Aquarion | Unsecured Debt | Aquarion - Unsecured Notes due 2023 - 2052 | Minimum
Debt Instrument [Line Items]
Interest rate	0.00%
Aquarion | Unsecured Debt | Aquarion - Unsecured Notes due 2023 - 2052 | Maximum
Debt Instrument [Line Items]
Interest rate	6.43%
Aquarion | Secured Debt | Aquarion - Secured Debt due 2023 - 2044
Debt Instrument [Line Items]
Long-Term Debt	$ 34,400	39,600
Aquarion | Secured Debt | Aquarion - Secured Debt due 2023 - 2044 | Minimum
Debt Instrument [Line Items]
Interest rate	2.864%
Aquarion | Secured Debt | Aquarion - Secured Debt due 2023 - 2044 | Maximum
Debt Instrument [Line Items]
Interest rate	9.29%
Aquarion | Senior Notes | Aquarion - Senior Notes due 2024
Debt Instrument [Line Items]
Interest rate	4.00%
Long-Term Debt	$ 360,000	$ 360,000

XML

LONG-TERM DEBT - Schedule of Issuances and Repayments (Details) - USD ($) $ in Thousands	1 Months Ended									12 Months Ended
	Jan. 31, 2023	Oct. 31, 2022	Sep. 30, 2022	Aug. 31, 2022	Jul. 31, 2022	Jun. 30, 2022	May 31, 2022	Mar. 31, 2022	Feb. 28, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Repayments of debt										$ (1,175,000)	$ (1,142,500)	$ (327,236)
NSTAR Electric
Debt Instrument [Line Items]
Repayments of debt										(400,000)	(250,000)	(95,000)
CL&P
Debt Instrument [Line Items]
Repayments of debt										0	(120,500)	0
PSNH
Debt Instrument [Line Items]
Repayments of debt										0	(282,000)	0
CL&P 2023 Series A First Mortgage Bonds | Mortgage Bonds | CL&P | Subsequent Event
Debt Instrument [Line Items]
Interest rate	5.25%
Issuance	$ 500,000
CL&P 2013 Series A First Mortgage Bonds | Mortgage Bonds | CL&P | Subsequent Event
Debt Instrument [Line Items]
Interest rate	2.50%
Repayments of debt	$ (400,000)
NSTAR Electric 2022 Debentures | Debentures | NSTAR Electric
Debt Instrument [Line Items]
Interest rate							4.55%
Issuance							$ 450,000
NSTAR Electric 2022 Debentures | Debentures | NSTAR Electric
Debt Instrument [Line Items]
Interest rate			4.95%
Issuance			$ 400,000
NSTAR Electric 2012 Debentures | Debentures | NSTAR Electric
Debt Instrument [Line Items]
Interest rate		2.375%
Repayments of debt		$ (400,000)
PSNH Series W First Mortgage Bonds | Mortgage Bonds | PSNH | Subsequent Event
Debt Instrument [Line Items]
Interest rate	5.15%
Issuance	$ 300,000
Yankee Gas Series B First Mortgage Bonds | First Mortgage Bonds | Yankee Gas Services Company
Debt Instrument [Line Items]
Interest rate								8.48%
Repayments of debt								$ (20,000)
Yankee Gas Series U First Mortgage Bonds | First Mortgage Bonds | Yankee Gas Services Company
Debt Instrument [Line Items]
Interest rate			4.31%
Issuance			$ 100,000
EGMA Series C First Mortgage Bonds | First Mortgage Bonds | EGMA
Debt Instrument [Line Items]
Interest rate						4.70%
Issuance						$ 100,000
NSTAR Gas Series V First Mortgage Bonds | First Mortgage Bonds | NSTAR Gas
Debt Instrument [Line Items]
Interest rate					4.40%
Issuance					$ 125,000
Aquarion Water Company of New Hampshire General Mortgage Bonds | General Mortgage Bonds (GMB) | Aquarion Water Company
Debt Instrument [Line Items]
Interest rate					4.45%
Repayments of debt					$ (5,000)
Aquarion Water Company of Connecticut Senior Notes | Senior Notes | Aquarion Water Company
Debt Instrument [Line Items]
Interest rate				4.69%
Issuance				$ 70,000
Eversource
Debt Instrument [Line Items]
Repayments of debt										$ (750,000)	$ (450,000)	$ 0
Eversource | Eversource Parent Series V Senior Notes | Senior Notes
Debt Instrument [Line Items]
Interest rate									2.90%
Issuance									$ 650,000
Eversource | Eversource Parent Series W Senior Notes | Senior Notes
Debt Instrument [Line Items]
Interest rate									3.375%
Issuance									$ 650,000
Eversource | Eversource Parent Series X Senior Notes | Senior Notes
Debt Instrument [Line Items]
Interest rate						4.20%
Issuance						$ 900,000
Eversource | Eversource Parent Series Y Senior Notes | Senior Notes
Debt Instrument [Line Items]
Interest rate						4.60%
Issuance						$ 600,000
Eversource | Eversource Parent Series K Senior Notes | Senior Notes
Debt Instrument [Line Items]
Interest rate								2.75%
Repayments of debt								$ (750,000)

XML

LONG-TERM DEBT - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 14, 2022	Nov. 30, 2022	Jun. 14, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt	$ 19,723,994				$ 17,023,577
Interest included in payment to settle spent nuclear fuel obligation	8,800				8,700
CL&P
Debt Instrument [Line Items]
Long-term debt	4,216,488				4,215,379
PSNH
Debt Instrument [Line Items]
Long-term debt	1,134,914				1,163,833
Line of Credit | NSTAR Gas
Debt Instrument [Line Items]
Amount of long-term debt requested for issuance				$ 325,000
Line of Credit | CL&P
Debt Instrument [Line Items]
Amount of long-term debt requested for issuance			$ 1,150,000
Line of Credit | PSNH
Debt Instrument [Line Items]
Amount of long-term debt requested for issuance		$ 600,000
Pre-1983 Spent Nuclear Fuel Obligation (CYAPC)
Debt Instrument [Line Items]
Long-term debt	$ 11,900				$ 11,700

XML

LONG-TERM DEBT - Schedule of Long-term Debt Maturities (Details) $ in Millions	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
2023	$ 2,008.4
2024	1,950.0
2025	1,400.2
2026	940.2
2027	2,539.2
Thereafter	12,236.0
Total	21,074.0
CL&P
Debt Instrument [Line Items]
2023	400.0
2024	139.8
2025	400.0
2026	0.0
2027	500.0
Thereafter	2,780.0
Total	4,219.8
NSTAR Electric
Debt Instrument [Line Items]
2023	80.0
2024	0.0
2025	250.0
2026	300.0
2027	700.0
Thereafter	3,140.0
Total	4,470.0
PSNH
Debt Instrument [Line Items]
2023	325.0
2024	0.0
2025	0.0
2026	0.0
2027	0.0
Thereafter	850.0
Total	$ 1,175.0

XML

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Narrative (Details) - PSNH - Rate Reduction Bonds - USD ($) $ in Millions	May 31, 2018	May 08, 2018
Debt Instrument [Line Items]
Amount of securitized rate reduction bonds issued	$ 635.7
Weighted average interest rate (in percent)		3.66%

XML

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	$ 5,578,300	$ 5,715,800
Regulatory Liabilities	3,930,305	3,866,251
Accrued Interest (included in Other Current Liabilities)	989,053	830,620
Rate Reduction Bonds - Current Portion	43,210	43,210
Rate Reduction Bonds - Long-Term Portion	410,492	453,702
Other Long-Term Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	$ 19,600	$ 44,700
Restricted Cash and Cash Equivalents, Statement of Financial Position [Extensible Enumeration]	Other Long-Term Assets	Other Long-Term Assets
Other Current Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash and Cash Equivalents, Statement of Financial Position [Extensible Enumeration]	Prepayments and Other Current Assets	Prepayments and Other Current Assets
Securitized Stranded Costs
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	$ 435,700	$ 478,900
Other Regulatory Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	322,500	150,000
PSNH
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	696,200	786,400
Regulatory Liabilities	391,628	381,366
Accrued Interest (included in Other Current Liabilities)	59,616	63,005
Rate Reduction Bonds - Current Portion	43,210	43,210
Rate Reduction Bonds - Long-Term Portion	410,492	453,702
PSNH | Other Long-Term Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	3,200	3,200
PSNH | Securitized Stranded Costs
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	435,700	478,900
PSNH | Other Regulatory Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	14,400	15,800
Variable Interest Entity, Primary Beneficiary | PSNH
Condensed Balance Sheet Statements, Captions [Line Items]
Rate Reduction Bonds - Current Portion	43,200	43,200
Rate Reduction Bonds - Long-Term Portion	410,500	453,700
Variable Interest Entity, Primary Beneficiary | PSNH | Other Long-Term Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	3,200	3,200
Variable Interest Entity, Primary Beneficiary | PSNH | Other Current Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Restricted Cash	32,400	31,100
Variable Interest Entity, Primary Beneficiary | PSNH | Securitized Stranded Costs
Condensed Balance Sheet Statements, Captions [Line Items]
Securitized Stranded Cost (included in Regulatory Assets)	435,700	478,900
Variable Interest Entity, Primary Beneficiary | PSNH | Other Regulatory Assets
Condensed Balance Sheet Statements, Captions [Line Items]
Regulatory Liabilities	6,000	5,400
Accrued Interest (included in Other Current Liabilities)	$ 6,900	$ 7,500

XML

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES - Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Income Statements, Captions [Line Items]
Interest Expense on RRB Principal (included in Interest Expense)	$ 678,274	$ 582,334	$ 538,452
PSNH
Condensed Income Statements, Captions [Line Items]
Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net)	42,867	86,832	52,804
Interest Expense on RRB Principal (included in Interest Expense)	59,548	56,998	58,127
Variable Interest Entity, Primary Beneficiary | PSNH | Rate Reduction Bonds
Condensed Income Statements, Captions [Line Items]
Amortization of RRB Principal (included in Amortization of Regulatory Assets, Net)	43,200	43,200	43,200
Interest Expense on RRB Principal (included in Interest Expense)	$ 17,000	$ 18,400	$ 19,700

XML

RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES- Rate Reduction Bonds, Principal and Interest Payments (Details) - PSNH $ in Millions	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
2023	$ 43.2
2024	43.2
2025	43.2
2026	43.2
2027	43.2
Thereafter	237.7
Total	$ 453.7

XML

EMPLOYEE BENEFITS - Schedule of Pension Benefit Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension and SERP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation as of Beginning of Year	$ (6,729.7)	$ (7,045.3)
Service Cost	(70.1)	(85.8)	$ (76.2)
Interest Cost	(154.5)	(130.0)	(177.8)
Actuarial Gain	1,385.8	177.1
Benefits Paid	302.5	309.5
Benefits Paid - Lump Sum	33.0	34.7
Benefits Paid - SERP	12.9	10.1
Employee Transfers	0.0	0.0
Benefit Obligation as of End of Year	(5,220.1)	(6,729.7)	(7,045.3)
Change in Pension Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	6,495.5	5,409.2
Actual Return on Plan Assets	(433.6)	1,250.5
Employer Contributions	80.0	180.0
Benefits Paid - Pension	(302.5)	(309.5)
Benefits Paid - Lump Sum	(33.0)	(34.7)
Employee Transfers	0.0	0.0
Fair Value of Plan Assets as of End of Year	5,806.4	6,495.5	5,409.2
Funded Status as of December 31st	586.3	(234.2)
PBOP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation as of Beginning of Year	(884.3)	(993.9)
Service Cost	(11.6)	(13.5)	(10.2)
Interest Cost	(20.2)	(17.4)	(24.6)
Actuarial Gain	173.6	81.4
Benefits Paid	52.1	51.7
Employee Transfers	0.0	0.0
Impact of Acquisitions	(3.3)	7.4
Benefit Obligation as of End of Year	(693.7)	(884.3)	(993.9)
Change in Pension Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	1,138.3	1,004.1
Actual Return on Plan Assets	(119.6)	183.2
Employer Contributions	3.1	2.3
Benefits Paid - Pension	(51.7)	(51.3)
Employee Transfers	0.0	0.0
Fair Value of Plan Assets as of End of Year	970.1	1,138.3	1,004.1
Funded Status as of December 31st	276.4	254.0
CL&P | Pension and SERP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation as of Beginning of Year	(1,330.9)	(1,477.3)
Service Cost	(18.7)	(23.0)	(21.8)
Interest Cost	(31.3)	(27.3)	(37.3)
Actuarial Gain	284.1	127.8
Benefits Paid	63.3	64.6
Benefits Paid - Lump Sum	0.0	0.0
Benefits Paid - SERP	0.3	0.3
Employee Transfers	3.2	4.0
Benefit Obligation as of End of Year	(1,030.0)	(1,330.9)	(1,477.3)
Change in Pension Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	1,323.8	1,043.1
Actual Return on Plan Assets	(85.3)	250.4
Employer Contributions	0.0	98.9
Benefits Paid - Pension	(63.3)	(64.6)
Benefits Paid - Lump Sum	0.0	0.0
Employee Transfers	(3.2)	(4.0)
Fair Value of Plan Assets as of End of Year	1,172.0	1,323.8	1,043.1
Funded Status as of December 31st	142.0	(7.1)
CL&P | PBOP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation as of Beginning of Year	(165.5)	(178.6)
Service Cost	(2.0)	(2.3)	(1.7)
Interest Cost	(3.7)	(3.2)	(4.4)
Actuarial Gain	33.0	5.8
Benefits Paid	10.4	10.9
Employee Transfers	(0.1)	1.9
Impact of Acquisitions	0.0	0.0
Benefit Obligation as of End of Year	(127.9)	(165.5)	(178.6)
Change in Pension Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	145.7	134.1
Actual Return on Plan Assets	(15.0)	24.1
Employer Contributions	0.0	0.0
Benefits Paid - Pension	(10.4)	(10.9)
Employee Transfers	0.3	(1.6)
Fair Value of Plan Assets as of End of Year	120.6	145.7	134.1
Funded Status as of December 31st	(7.3)	(19.8)
NSTAR Electric | Pension and SERP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation as of Beginning of Year	(1,448.4)	(1,517.9)
Service Cost	(13.8)	(15.8)	(15.4)
Interest Cost	(32.8)	(26.8)	(38.6)
Actuarial Gain	295.5	20.8
Benefits Paid	68.4	68.7
Benefits Paid - Lump Sum	14.8	15.6
Benefits Paid - SERP	0.2	0.2
Employee Transfers	5.7	6.8
Benefit Obligation as of End of Year	(1,110.4)	(1,448.4)	(1,517.9)
Change in Pension Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	1,596.0	1,345.1
Actual Return on Plan Assets	(103.3)	312.0
Employer Contributions	15.0	30.0
Benefits Paid - Pension	(68.4)	(68.7)
Benefits Paid - Lump Sum	(14.8)	(15.6)
Employee Transfers	(5.7)	(6.8)
Fair Value of Plan Assets as of End of Year	1,418.8	1,596.0	1,345.1
Funded Status as of December 31st	308.4	147.6
NSTAR Electric | PBOP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation as of Beginning of Year	(238.4)	(260.5)
Service Cost	(2.0)	(2.4)	(2.1)
Interest Cost	(5.3)	(4.4)	(6.6)
Actuarial Gain	39.4	11.5
Benefits Paid	16.6	16.3
Employee Transfers	0.2	1.1
Impact of Acquisitions	0.0	0.0
Benefit Obligation as of End of Year	(189.5)	(238.4)	(260.5)
Change in Pension Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	530.0	464.6
Actual Return on Plan Assets	(57.0)	84.2
Employer Contributions	0.0	0.0
Benefits Paid - Pension	(16.6)	(16.3)
Employee Transfers	(0.3)	(2.5)
Fair Value of Plan Assets as of End of Year	456.1	530.0	464.6
Funded Status as of December 31st	266.6	291.6
PSNH | Pension and SERP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation as of Beginning of Year	(721.0)	(748.7)
Service Cost	(6.9)	(8.9)	(8.2)
Interest Cost	(16.9)	(14.5)	(19.4)
Actuarial Gain	156.7	14.7
Benefits Paid	33.9	34.7
Benefits Paid - Lump Sum	1.0	0.0
Benefits Paid - SERP	0.4	0.4
Employee Transfers	(3.4)	1.3
Benefit Obligation as of End of Year	(556.2)	(721.0)	(748.7)
Change in Pension Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	694.6	593.7
Actual Return on Plan Assets	(45.1)	136.9
Employer Contributions	0.0	0.0
Benefits Paid - Pension	(33.9)	(34.7)
Benefits Paid - Lump Sum	(1.0)	0.0
Employee Transfers	3.4	(1.3)
Fair Value of Plan Assets as of End of Year	618.0	694.6	593.7
Funded Status as of December 31st	61.8	(26.4)
PSNH | PBOP
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit Obligation as of Beginning of Year	(92.3)	(109.5)
Service Cost	(1.1)	(1.2)	(0.9)
Interest Cost	(2.2)	(1.8)	(2.8)
Actuarial Gain	15.2	14.6
Benefits Paid	6.0	5.6
Employee Transfers	(0.2)	0.0
Impact of Acquisitions	0.0	0.0
Benefit Obligation as of End of Year	(74.6)	(92.3)	(109.5)
Change in Pension Plan Assets:
Fair Value of Plan Assets as of Beginning of Year	88.0	79.4
Actual Return on Plan Assets	(9.8)	14.2
Employer Contributions	0.0	0.0
Benefits Paid - Pension	(6.0)	(5.6)
Employee Transfers	0.1	0.0
Fair Value of Plan Assets as of End of Year	72.3	88.0	$ 79.4
Funded Status as of December 31st	$ (2.3)	$ (4.3)

XML

EMPLOYEE BENEFITS - Pension Plan Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Contribution Plan Disclosure [Line Items]
Expected long-term rate of return	7.00%	7.00%
Pension and SERP
Defined Contribution Plan Disclosure [Line Items]
Increase (decrease) in liability as a result of a change in discount rate	$ (1,480.0)	$ (286.8)
Expected long-term rate of return	8.25%	8.25%	8.25%
Estimated future employer contributions in next fiscal year	$ 5.0
PBOP
Defined Contribution Plan Disclosure [Line Items]
Increase (decrease) in liability as a result of a change in discount rate	$ (180.1)	$ (29.8)
Expected long-term rate of return	8.25%	8.25%	8.25%
Estimated future employer contributions in next fiscal year	$ 2.9
Pre-65 Plan | PBOP
Defined Contribution Plan Disclosure [Line Items]
Health care trend rate	7.00%
Ultimate rate	5.00%
Pre-65 Plan | Minimum | PBOP | Aquarion
Defined Contribution Plan Disclosure [Line Items]
Health care trend rate	3.50%	3.50%
Pre-65 Plan | Maximum | PBOP | Aquarion
Defined Contribution Plan Disclosure [Line Items]
Health care trend rate	6.50%	6.20%
Post-65 Plan | PBOP
Defined Contribution Plan Disclosure [Line Items]
Ultimate rate	3.50%
Eversource Service Pension and PBOP Plans
Defined Contribution Plan Disclosure [Line Items]
Assumed rate of return	8.25%
Aquarion Plans
Defined Contribution Plan Disclosure [Line Items]
Assumed rate of return	7.00%

XML

EMPLOYEE BENEFITS - Schedule of Funded Status (Details) - Pension and SERP - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 4,911.6	$ 6,337.3
CL&P
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	960.7	1,241.1
NSTAR Electric
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	1,055.1	1,376.1
PSNH
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 516.9	$ 670.3

XML

EMPLOYEE BENEFITS - Schedule of Actuarial Assumptions (Details)	Dec. 31, 2022	Dec. 31, 2021
Pension and SERP | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	5.10%	2.80%
Compensation/Progression Rate	3.50%	3.50%
Pension and SERP | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	5.20%	3.00%
Compensation/Progression Rate	4.00%	4.00%
PBOP | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	5.20%	2.91%
PBOP | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount Rate		2.92%

XML

EMPLOYEE BENEFITS - Schedule of Prepaid Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	$ 1,045.5	$ 272.0
Less: Accrued SERP - current portion	(47.3)	(9.7)
Accrued Pension, SERP and PBOP	135.5	242.5
CL&P
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	147.9	0.4
Less: Accrued SERP - current portion	(0.3)	(0.5)
Accrued Pension, SERP and PBOP	12.9	26.8
NSTAR Electric
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	576.8	441.4
Less: Accrued SERP - current portion	(0.2)	(0.2)
Accrued Pension, SERP and PBOP	1.6	2.0
PSNH
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	66.4	0.0
Less: Accrued SERP - current portion	(0.4)	(0.5)
Accrued Pension, SERP and PBOP	6.5	30.2
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	756.7	0.0
Accrued liability, defined benefit pension plan	3.7	58.1
Pension Plan | CL&P
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	147.9	0.4
Accrued liability, defined benefit pension plan	0.0	0.0
Pension Plan | NSTAR Electric
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	310.2	149.8
Accrued liability, defined benefit pension plan	0.0	0.0
Pension Plan | PSNH
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	66.4	0.0
Accrued liability, defined benefit pension plan	0.0	20.6
PBOP
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	288.8	272.0
Accrued liability, defined benefit pension plan	12.4	18.0
PBOP | CL&P
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	0.0	0.0
Accrued liability, defined benefit pension plan	7.3	19.8
PBOP | NSTAR Electric
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	266.6	291.6
Accrued liability, defined benefit pension plan	0.0	0.0
PBOP | PSNH
Defined Benefit Plan Disclosure [Line Items]
Prepaid asset	0.0	0.0
Accrued liability, defined benefit pension plan	2.3	4.3
SERP
Defined Benefit Plan Disclosure [Line Items]
Accrued liability, defined benefit pension plan	166.7	176.1
SERP | CL&P
Defined Benefit Plan Disclosure [Line Items]
Accrued liability, defined benefit pension plan	5.9	7.5
SERP | NSTAR Electric
Defined Benefit Plan Disclosure [Line Items]
Accrued liability, defined benefit pension plan	1.8	2.2
SERP | PSNH
Defined Benefit Plan Disclosure [Line Items]
Accrued liability, defined benefit pension plan	$ 4.6	$ 5.8

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EMPLOYEE BENEFITS - Schedule of Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension and SERP
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 70.1	$ 85.8	$ 76.2
Interest Cost	154.5	130.0	177.8
Expected Return on Plan Assets	(523.6)	(437.5)	(400.3)
Actuarial Loss	116.0	243.9	202.0
Prior Service Cost/(Credit)	1.4	1.4	1.2
Total Net Periodic Benefit Plan Expense/(Income)	$ (181.6)	$ 23.6	56.9
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Income, Net	Other Income, Net
PBOP
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 11.6	$ 13.5	10.2
Interest Cost	20.2	17.4	24.6
Expected Return on Plan Assets	(89.9)	(79.1)	(73.6)
Actuarial Loss	0.0	8.9	8.4
Prior Service Cost/(Credit)	(21.7)	(21.2)	(21.2)
Total Net Periodic Benefit Plan Expense/(Income)	$ (79.8)	$ (60.5)	(51.6)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Income, Net	Other Income, Net
CL&P | Pension and SERP
Defined Benefit Plan Disclosure [Line Items]
Service Cost	$ 18.7	$ 23.0	21.8
Interest Cost	31.3	27.3	37.3
Expected Return on Plan Assets	(106.3)	(86.8)	(79.2)
Actuarial Loss	16.2	45.5	39.2
Prior Service Cost/(Credit)	0.0	0.0	0.0
Total Net Periodic Benefit Plan Expense/(Income)	(40.1)	9.0	19.1
Intercompany Income Allocations	(16.0)	8.0	9.1
CL&P | PBOP
Defined Benefit Plan Disclosure [Line Items]
Service Cost	2.0	2.3	1.7
Interest Cost	3.7	3.2	4.4
Expected Return on Plan Assets	(11.4)	(10.3)	(9.9)
Actuarial Loss	0.0	1.8	1.1
Prior Service Cost/(Credit)	1.1	1.1	1.1
Total Net Periodic Benefit Plan Expense/(Income)	(4.6)	(1.9)	(1.6)
Intercompany Income Allocations	(3.7)	(1.6)	(1.1)
NSTAR Electric | Pension and SERP
Defined Benefit Plan Disclosure [Line Items]
Service Cost	13.8	15.8	15.4
Interest Cost	32.8	26.8	38.6
Expected Return on Plan Assets	(128.4)	(108.1)	(103.0)
Actuarial Loss	32.8	61.6	55.2
Prior Service Cost/(Credit)	0.3	0.3	0.3
Total Net Periodic Benefit Plan Expense/(Income)	(48.7)	(3.6)	6.5
Intercompany Income Allocations	(12.4)	8.8	8.9
NSTAR Electric | PBOP
Defined Benefit Plan Disclosure [Line Items]
Service Cost	2.0	2.4	2.1
Interest Cost	5.3	4.4	6.6
Expected Return on Plan Assets	(42.4)	(36.9)	(34.0)
Actuarial Loss	0.0	2.4	2.5
Prior Service Cost/(Credit)	(17.0)	(17.0)	(17.0)
Total Net Periodic Benefit Plan Expense/(Income)	(52.1)	(44.7)	(39.8)
Intercompany Income Allocations	(3.6)	(1.9)	(1.4)
PSNH | Pension and SERP
Defined Benefit Plan Disclosure [Line Items]
Service Cost	6.9	8.9	8.2
Interest Cost	16.9	14.5	19.4
Expected Return on Plan Assets	(56.1)	(47.5)	(44.7)
Actuarial Loss	7.9	20.7	15.6
Prior Service Cost/(Credit)	0.0	0.0	0.0
Total Net Periodic Benefit Plan Expense/(Income)	(24.4)	(3.4)	(1.5)
Intercompany Income Allocations	(3.6)	2.7	2.9
PSNH | PBOP
Defined Benefit Plan Disclosure [Line Items]
Service Cost	1.1	1.2	0.9
Interest Cost	2.2	1.8	2.8
Expected Return on Plan Assets	(6.7)	(6.1)	(5.7)
Actuarial Loss	0.0	0.7	0.8
Prior Service Cost/(Credit)	0.4	0.4	0.4
Total Net Periodic Benefit Plan Expense/(Income)	(3.0)	(2.0)	(0.8)
Intercompany Income Allocations	$ (1.2)	$ (0.6)	$ (0.5)

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EMPLOYEE BENEFITS - Schedule of Assumptions used To Calculate Pension and SERP and PBOP (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Expected Long-Term Rate of Return (in percent)	7.00%	7.00%
Pension and SERP
Defined Benefit Plan Disclosure [Line Items]
Expected Long-Term Rate of Return (in percent)	8.25%	8.25%	8.25%
PBOP
Defined Benefit Plan Disclosure [Line Items]
Expected Long-Term Rate of Return (in percent)	8.25%	8.25%	8.25%
Minimum | Pension and SERP
Defined Benefit Plan Disclosure [Line Items]
Discount rate (in percent)	2.20%	1.50%	2.60%
Compensation/Progression Rate (in percent)	3.50%	3.50%	3.50%
Minimum | PBOP
Defined Benefit Plan Disclosure [Line Items]
Discount rate (in percent)	2.30%	1.80%	2.70%
Maximum | Pension and SERP
Defined Benefit Plan Disclosure [Line Items]
Discount rate (in percent)	3.20%	3.00%	3.50%
Compensation/Progression Rate (in percent)	4.00%	4.00%	4.00%
Maximum | PBOP
Defined Benefit Plan Disclosure [Line Items]
Discount rate (in percent)	3.30%	3.10%	3.60%

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EMPLOYEE BENEFITS - Summary of Changes in Plan Assets and Benefit Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Pension and SERP
Net Regulatory Assets [Abstract]
Actuarial (Gains)/Losses Arising During the Year	$ (431.6)	$ (961.7)
Actuarial Losses Reclassified as Net Periodic Benefit Expense	(107.0)	(231.2)
Prior Service (Cost)/Credit Reclassified as Net Periodic Benefit (Expense)/Income	(1.2)	(1.3)
Actuarial Loss	888.7	1,427.3
Prior Service (Credit)/Cost	4.1	5.3
OCI
Actuarial (Gains)/Losses Arising During the Year	4.6	(28.4)
Actuarial Losses Reclassified as Net Periodic Benefit Expense	(9.0)	(12.7)
Prior Service (Cost)/Credit Reclassified as Net Periodic Benefit (Expense)/Income	(0.2)	(0.1)
Actuarial Loss	61.9	66.3
Prior Service Cost	0.4	0.6
PBOP
Net Regulatory Assets [Abstract]
Actuarial (Gains)/Losses Arising During the Year	36.8	(181.5)
Actuarial Losses Reclassified as Net Periodic Benefit Expense	0.0	(8.5)
Prior Service (Cost)/Credit Reclassified as Net Periodic Benefit (Expense)/Income	21.8	21.1
Actuarial Loss	81.8	45.0
Prior Service (Credit)/Cost	(108.3)	(130.1)
OCI
Actuarial (Gains)/Losses Arising During the Year	(0.8)	(4.0)
Actuarial Losses Reclassified as Net Periodic Benefit Expense	0.0	(0.4)
Prior Service (Cost)/Credit Reclassified as Net Periodic Benefit (Expense)/Income	(0.1)	0.1
Actuarial Loss	2.7	3.5
Prior Service Cost	$ 0.9	$ 1.0

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EMPLOYEE BENEFITS - Schedule of Estimated Future Benefit Payments (Details) $ in Millions	Dec. 31, 2022 USD ($)
Pension and SERP
Defined Contribution Plan Disclosure [Line Items]
2023	$ 401.4
2024	374.4
2025	380.1
2026	383.0
2027	384.1
2028 - 2032	1,901.7
PBOP
Defined Contribution Plan Disclosure [Line Items]
2023	57.9
2024	57.3
2025	56.6
2026	55.5
2027	54.4
2028 - 2032	$ 253.7

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EMPLOYEE BENEFITS - Schedule of Long-term Rates of Return on Pension and PBOP (Details)	Dec. 31, 2022	Dec. 31, 2021
United States
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	15.00%	15.00%
Assumed Rate of Return (in percent)	8.50%	8.50%
Global
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	10.00%	10.00%
Assumed Rate of Return (in percent)	8.75%	8.75%
Non-United States
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	8.00%	8.00%
Assumed Rate of Return (in percent)	8.50%	8.50%
Emerging Markets
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	4.00%	4.00%
Assumed Rate of Return (in percent)	10.00%	10.00%
Fixed Income
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	13.00%	13.00%
Assumed Rate of Return (in percent)	4.00%	4.00%
Public High Yield Fixed Income
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	4.00%	4.00%
Assumed Rate of Return (in percent)	6.50%	6.50%
Private Debt
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	13.00%	13.00%
Assumed Rate of Return (in percent)	9.00%	9.00%
Private Equity
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	18.00%	18.00%
Assumed Rate of Return (in percent)	12.00%	12.00%
Real Assets
Defined Contribution Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	15.00%	15.00%
Assumed Rate of Return (in percent)	7.50%	7.50%

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EMPLOYEE BENEFITS - Schedule of Asset Category (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension and SERP
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	$ 5,806.4	$ 6,495.5	$ 5,409.2
Uncategorized	5,116.9	5,479.8
Pension and SERP | Total Assets Before 401
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	6,062.0	6,794.0
Pension and SERP | Equity securities
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	1,509.9	2,107.7
Uncategorized	1,102.2	1,385.2
Pension and SERP | Fixed Income
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	1,954.4	2,062.5
Uncategorized	1,598.8	1,689.1
Pension and SERP | Private Equity
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	1,684.9	1,702.7
Uncategorized	1,684.9	1,702.7
Pension and SERP | Real Assets
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	912.8	921.1
Uncategorized	731.0	702.8
Pension and SERP | 401 PBOP Assets
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	(255.6)	(298.5)
Pension and SERP | Level 1
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	866.6	1,080.4
Pension and SERP | Level 1 | Equity securities
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	407.7	722.5
Pension and SERP | Level 1 | Fixed Income
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	277.1	139.6
Pending redemption settlements	138.0
Pension and SERP | Level 1 | Private Equity
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	0.0	0.0
Pension and SERP | Level 1 | Real Assets
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	181.8	218.3
Pension and SERP | Level 2
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	78.5	233.8
Pension and SERP | Level 2 | Equity securities
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	0.0	0.0
Pension and SERP | Level 2 | Fixed Income
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	78.5	233.8
Pension and SERP | Level 2 | Private Equity
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	0.0	0.0
Pension and SERP | Level 2 | Real Assets
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	0.0	0.0
PBOP
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	970.1	1,138.3	$ 1,004.1
Uncategorized	431.7	463.5
PBOP | Total Assets Before 401
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	714.5	839.8
PBOP | Equity securities
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	336.7	439.7
Uncategorized	183.5	248.3
PBOP | Fixed Income
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	199.5	220.4
Uncategorized	141.1	125.5
PBOP | Private Equity
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	70.9	58.7
Uncategorized	70.9	58.7
PBOP | Real Assets
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	107.4	121.0
Uncategorized	36.2	31.0
PBOP | 401 PBOP Assets
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	255.6	298.5
PBOP | Level 1
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	242.6	331.1
PBOP | Level 1 | Equity securities
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	153.2	191.4
PBOP | Level 1 | Fixed Income
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	18.2	49.7
PBOP | Level 1 | Private Equity
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	0.0	0.0
PBOP | Level 1 | Real Assets
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	71.2	90.0
PBOP | Level 2
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	40.2	45.2
PBOP | Level 2 | Equity securities
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	0.0	0.0
PBOP | Level 2 | Fixed Income
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	40.2	45.2
PBOP | Level 2 | Private Equity
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	0.0	0.0
PBOP | Level 2 | Real Assets
Defined Contribution Plan Disclosure [Line Items]
Fair value of pension plan assets	$ 0.0	$ 0.0

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EMPLOYEE BENEFITS - Defined Contribution Plan Narrative (Details)	12 Months Ended
	Dec. 31, 2022
Defined Contribution Plan, 401K
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution (as a percentage)	100.00%
Percentage of employees' pay (up to)	3.00%
Defined Contribution Plan, Alternate Contribution 401K
Defined Contribution Plan Disclosure [Line Items]
Employer matching contribution (as a percentage)	50.00%
Percentage of employees' pay (up to)	8.00%

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EMPLOYEE BENEFITS - Schedule of Defined Contribution Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost recognized	$ 59.9	$ 55.5	$ 49.4
CL&P
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost recognized	7.7	7.0	6.6
NSTAR Electric
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost recognized	12.8	12.2	11.8
PSNH
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan, cost recognized	$ 4.8	$ 4.3	$ 4.1

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EMPLOYEE BENEFITS - Share-Based Payments Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted in incentive plan (up to) (in shares)	3,200,000
Shares available for issuance under incentive plan (in shares)	903,183	2,430,716
Shares outstanding (in shares)	300,592
Weighted average grant date fair value of restricted stock units (in dollars per share)	$ 81.07
Total unrecognized compensation expense	$ 24.5
Period for recognition	1 year 9 months 7 days
Tax effect on total share-based payments (in percentage)	26.00%
Excess stock benefit	$ 2.1	$ 4.0	$ 6.6
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in dollars per share)	$ 85.96	$ 81.89	$ 88.23
Shares outstanding (in shares)		297,270
Weighted average shares outstanding (in dollars per share)	$ 87.21	$ 83.39
Restricted stock units available (in shares)	184,540
Restricted stock unit fully vested (in shares)	329,142
Additional restricted stock unit expected to vest (in shares)	285,562
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in dollars per share)	$ 83.34	$ 76.08	$ 75.36
Shares outstanding (in shares)	457,069	436,957
Weighted average shares outstanding (in dollars per share)	$ 88.43	$ 81.41
Restricted stock units available (in shares)	311,553
Weighted average grant date fair value of restricted stock units (in dollars per share)	$ 73.15
Restricted stock unit fully vested (in shares)	90,221
CL&P
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation expense	$ 4.0
Excess stock benefit	0.7	$ 1.5	$ 2.3
NSTAR Electric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation expense	6.9
Excess stock benefit	0.8	1.4	2.3
PSNH
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation expense	1.4
Excess stock benefit	$ 0.3	$ 0.5	$ 0.8
CL&P, NSTAR Electric and PSNH
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition	1 year 9 months 10 days
Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of graded vesting schedule under long-term incentive program	3 years
Board Members
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period of graded vesting schedule under long-term incentive program	1 year

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EMPLOYEE BENEFITS - Summary of RSU and Share Transactions (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restricted Stock Units (RSUs)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)	594,623
Granted (in shares)	218,005
Shares issued (in shares)	(174,633)
Forfeited (in shares)	(8,261)
Ending balance (in shares)	629,734	594,623
Weighted Average Grant-Date Fair Value
Beginning balance (in dollars per share)	$ 65.70
Granted (in dollars per share)	85.96	$ 81.89	$ 88.23
Shares issued (in dollars per share)	79.89
Forfeited (in dollars per share)	85.87
Ending balance (in dollars per share)	$ 68.52	$ 65.70
Performance Shares
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Beginning balance (in shares)	464,507
Granted (in shares)	337,406
Shares issued (in shares)	(248,981)
Forfeited (in shares)	(5,642)
Ending balance (in shares)	547,290	464,507
Weighted Average Grant-Date Fair Value
Beginning balance (in dollars per share)	$ 80.54
Granted (in dollars per share)	83.34	$ 76.08	$ 75.36
Shares issued (in dollars per share)	68.96
Forfeited (in dollars per share)	85.28
Ending balance (in dollars per share)	$ 87.49	$ 80.54

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EMPLOYEE BENEFITS - Schedule of Compensation Expense and Income Tax Benefit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	$ 33.4	$ 28.2	$ 33.9
Future Income Tax Benefit	8.7	7.3	8.9
CL&P
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	10.0	8.8	10.9
Future Income Tax Benefit	2.6	2.3	2.9
NSTAR Electric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	10.7	9.0	11.3
Future Income Tax Benefit	2.8	2.3	3.0
PSNH
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense	3.6	3.0	3.6
Future Income Tax Benefit	$ 0.9	$ 0.8	$ 1.0

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EMPLOYEE BENEFITS - Schedule of Other Retirement Benefits (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarially-Determined Liability	$ 43.4	$ 42.8	$ 45.7
Other Retirement Benefits Expense	10.9	2.2	3.3
Retirement benefit payable	9.2
CL&P
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarially-Determined Liability	0.2	0.2	0.2
Other Retirement Benefits Expense	4.0	0.7	1.2
NSTAR Electric
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarially-Determined Liability	0.1	0.1	0.1
Other Retirement Benefits Expense	3.7	0.7	1.1
PSNH
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actuarially-Determined Liability	1.3	1.5	1.7
Other Retirement Benefits Expense	$ 1.3	$ 0.3	$ 0.5

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INCOME TAXES - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current Income Taxes:
Federal	$ 95,800	$ 21,500	$ 73,600
State	13,600	(21,600)	19,100
Total Current	109,400	(100)	92,700
Deferred Income Taxes, Net:
Federal	198,800	199,700	173,500
State	148,000	147,400	83,700
Total Deferred	346,779	347,056	257,154
Investment Tax Credits, Net	(2,600)	(2,800)	(3,700)
Income Tax Expense	453,574	344,223	346,186
CL&P
Current Income Taxes:
Federal	106,200	15,000	12,000
State	20,100	(7,000)	(6,100)
Total Current	126,300	8,000	5,900
Deferred Income Taxes, Net:
Federal	17,200	76,300	101,100
State	28,200	47,600	43,400
Total Deferred	45,381	123,889	144,527
Investment Tax Credits, Net	(500)	(600)	(700)
Income Tax Expense	171,198	131,273	149,702
NSTAR Electric
Current Income Taxes:
Federal	55,000	52,300	53,900
State	8,700	6,200	6,900
Total Current	63,700	58,500	60,800
Deferred Income Taxes, Net:
Federal	35,600	16,300	33,800
State	42,400	41,200	38,800
Total Deferred	78,039	57,507	72,595
Investment Tax Credits, Net	(1,700)	(1,700)	(2,600)
Income Tax Expense	139,977	114,335	130,828
PSNH
Current Income Taxes:
Federal	29,600	43,100	20,600
State	5,900	10,800	3,800
Total Current	35,500	53,900	24,400
Deferred Income Taxes, Net:
Federal	5,900	(14,900)	(1,300)
State	9,900	400	8,600
Total Deferred	15,765	(14,530)	7,337
Investment Tax Credits, Net	0	0	0
Income Tax Expense	$ 51,314	$ 39,433	$ 31,680

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INCOME TAXES - Reconciliation Between Income Tax Expense and Expected Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Income Before Income Tax Expense	$ 1,865,968	$ 1,572,269	$ 1,558,872
Statutory Federal Income Tax Expense at 21%	391,900	330,200	327,400
Tax Effect of Differences:
Depreciation	(17,100)	(18,100)	(11,100)
Investment Tax Credit Amortization	(2,600)	(2,800)	(3,700)
State Income Taxes, Net of Federal Impact	75,900	54,400	44,900
Dividends on ESOP	(5,100)	(5,100)	(5,100)
Tax Asset Valuation   Allowance/Reserve Adjustments	51,600	44,600	33,400
Excess Stock Benefit	(2,100)	(4,000)	(6,600)
EDIT Amortization	(49,100)	(69,100)	(48,700)
Other, Net	10,200	14,100	15,700
Income Tax Expense	$ 453,574	$ 344,223	$ 346,186
Effective Tax Rate	24.30%	21.90%	22.20%
CL&P
Income Tax Contingency [Line Items]
Income Before Income Tax Expense	$ 704,118	$ 532,998	$ 607,636
Statutory Federal Income Tax Expense at 21%	147,900	111,900	127,600
Tax Effect of Differences:
Depreciation	(3,700)	(6,400)	400
Investment Tax Credit Amortization	(500)	(600)	(700)
State Income Taxes, Net of Federal Impact	(6,600)	(4,600)	(1,200)
Tax Asset Valuation   Allowance/Reserve Adjustments	44,700	36,700	30,700
Excess Stock Benefit	(700)	(1,500)	(2,300)
EDIT Amortization	(9,200)	(9,800)	(9,000)
Other, Net	(700)	5,600	4,200
Income Tax Expense	$ 171,198	$ 131,273	$ 149,702
Effective Tax Rate	24.30%	24.60%	24.60%
NSTAR Electric
Income Tax Contingency [Line Items]
Income Before Income Tax Expense	$ 632,405	$ 590,904	$ 575,829
Statutory Federal Income Tax Expense at 21%	132,800	124,100	120,900
Tax Effect of Differences:
Depreciation	(4,200)	(3,400)	(3,700)
Investment Tax Credit Amortization	(1,700)	(1,700)	(2,600)
State Income Taxes, Net of Federal Impact	40,300	37,500	36,000
Tax Asset Valuation   Allowance/Reserve Adjustments	0	0	0
Excess Stock Benefit	(800)	(1,400)	(2,300)
EDIT Amortization	(29,200)	(43,200)	(20,400)
Other, Net	2,800	2,400	2,900
Income Tax Expense	$ 139,977	$ 114,335	$ 130,828
Effective Tax Rate	22.10%	19.30%	22.70%
PSNH
Income Tax Contingency [Line Items]
Income Before Income Tax Expense	$ 222,884	$ 189,771	$ 178,992
Statutory Federal Income Tax Expense at 21%	46,800	39,900	37,600
Tax Effect of Differences:
Depreciation	900	(200)	(1,400)
Investment Tax Credit Amortization	0	0	0
State Income Taxes, Net of Federal Impact	12,500	8,900	9,800
Tax Asset Valuation   Allowance/Reserve Adjustments	0	0	0
Excess Stock Benefit	(300)	(500)	(800)
EDIT Amortization	(7,700)	(10,500)	(15,400)
Other, Net	(900)	1,800	1,900
Income Tax Expense	$ 51,314	$ 39,433	$ 31,680
Effective Tax Rate	23.00%	20.80%	17.70%

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INCOME TAXES - Temporary Differences That Give Rise To Accumulated Deferred Income Tax Obligations (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred Tax Assets:
Employee Benefits	$ 228.9	$ 270.8
Derivative Liabilities	53.8	76.8
Regulatory Deferrals - Liabilities	529.5	390.7
Allowance for Uncollectible Accounts	125.5	104.1
Tax Effect - Tax Regulatory Liabilities	762.9	783.4
Net Operating Loss Carryforwards	16.7	7.5
Purchase Accounting Adjustment	62.0	67.2
Other	176.6	196.6
Total Deferred Tax Assets	1,955.9	1,897.1
Less:  Valuation Allowance	82.8	61.5
Net Deferred Tax Assets	1,873.1	1,835.6
Deferred Tax Liabilities:
Accelerated Depreciation and Other   Plant-Related Differences	4,793.7	4,426.0
Property Tax Accruals	95.3	88.1
Regulatory Amounts:
Regulatory Deferrals - Assets	1,251.9	1,260.3
Tax Effect - Tax Regulatory Assets	271.7	257.8
Goodwill-related Regulatory Asset - 1999 Merger	76.8	81.4
Employee Benefits	305.5	174.7
Derivative Assets	10.5	14.9
Other	135.6	129.5
Total Deferred Tax Liabilities	6,941.0	6,432.7
CL&P
Deferred Tax Assets:
Employee Benefits	25.3	23.9
Derivative Liabilities	53.8	76.8
Regulatory Deferrals - Liabilities	146.6	90.9
Allowance for Uncollectible Accounts	60.5	48.8
Tax Effect - Tax Regulatory Liabilities	324.6	328.2
Net Operating Loss Carryforwards	0.0	0.0
Purchase Accounting Adjustment	0.0	0.0
Other	109.5	103.9
Total Deferred Tax Assets	720.3	672.5
Less:  Valuation Allowance	63.3	44.5
Net Deferred Tax Assets	657.0	628.0
Deferred Tax Liabilities:
Accelerated Depreciation and Other   Plant-Related Differences	1,602.0	1,509.5
Property Tax Accruals	40.7	40.5
Regulatory Amounts:
Regulatory Deferrals - Assets	406.4	438.3
Tax Effect - Tax Regulatory Assets	185.6	181.4
Goodwill-related Regulatory Asset - 1999 Merger	0.0	0.0
Employee Benefits	45.0	3.5
Derivative Assets	10.5	14.9
Other	6.8	2.0
Total Deferred Tax Liabilities	2,297.0	2,190.1
NSTAR Electric
Deferred Tax Assets:
Employee Benefits	57.4	40.3
Derivative Liabilities	0.0	0.0
Regulatory Deferrals - Liabilities	285.7	215.4
Allowance for Uncollectible Accounts	20.7	21.5
Tax Effect - Tax Regulatory Liabilities	241.8	254.3
Net Operating Loss Carryforwards	0.0	0.0
Purchase Accounting Adjustment	0.0	0.0
Other	20.5	21.7
Total Deferred Tax Assets	626.1	553.2
Less:  Valuation Allowance	0.0	0.0
Net Deferred Tax Assets	626.1	553.2
Deferred Tax Liabilities:
Accelerated Depreciation and Other   Plant-Related Differences	1,643.7	1,553.7
Property Tax Accruals	41.3	33.7
Regulatory Amounts:
Regulatory Deferrals - Assets	407.9	337.6
Tax Effect - Tax Regulatory Assets	10.7	10.9
Goodwill-related Regulatory Asset - 1999 Merger	65.9	69.9
Employee Benefits	140.8	107.1
Derivative Assets	0.0	0.0
Other	16.7	19.8
Total Deferred Tax Liabilities	2,327.0	2,132.7
PSNH
Deferred Tax Assets:
Employee Benefits	11.6	14.1
Derivative Liabilities	0.0	0.0
Regulatory Deferrals - Liabilities	42.1	24.3
Allowance for Uncollectible Accounts	7.9	6.2
Tax Effect - Tax Regulatory Liabilities	97.8	100.9
Net Operating Loss Carryforwards	0.0	0.0
Purchase Accounting Adjustment	0.0	0.0
Other	21.3	22.9
Total Deferred Tax Assets	180.7	168.4
Less:  Valuation Allowance	0.0	0.0
Net Deferred Tax Assets	180.7	168.4
Deferred Tax Liabilities:
Accelerated Depreciation and Other   Plant-Related Differences	523.8	482.9
Property Tax Accruals	6.7	6.3
Regulatory Amounts:
Regulatory Deferrals - Assets	165.2	198.4
Tax Effect - Tax Regulatory Assets	7.9	8.3
Goodwill-related Regulatory Asset - 1999 Merger	0.0	0.0
Employee Benefits	18.7	0.7
Derivative Assets	0.0	0.0
Other	21.2	9.8
Total Deferred Tax Liabilities	$ 743.5	$ 706.4

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INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
Accrued interest payable	$ 0.1	$ 0.1
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Valuation allowance for tax credit and operating loss carryforward	82.8	61.5
State and Local Jurisdiction | CL&P
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	18.8	10.8
Eversource | State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Change in valuation allowance	$ 21.3	$ 13.0

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INCOME TAXES - Tax Credits and Loss Carryforwards (Details) - State and Local Jurisdiction - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating Loss Carryforwards [Line Items]
State Net Operating Loss	$ 288.1	$ 138.3
State Tax Credit	204.5	197.7
State Charitable Contribution	20.1	23.7
CL&P
Operating Loss Carryforwards [Line Items]
State Net Operating Loss	0.0	0.0
State Tax Credit	137.7	137.0
State Charitable Contribution	0.0	0.0
NSTAR Electric
Operating Loss Carryforwards [Line Items]
State Net Operating Loss	0.0	0.0
State Tax Credit	0.0	0.0
State Charitable Contribution	0.0	0.0
PSNH
Operating Loss Carryforwards [Line Items]
State Net Operating Loss	0.0	0.0
State Tax Credit	0.0	0.0
State Charitable Contribution	$ 0.0	$ 0.0

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INCOME TAXES - Reconciliation of Unrecognized Tax Benefit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	$ 65.8	$ 61.8	$ 55.0
Gross Increases - Current Year	11.5	11.3	11.9
Gross Increases - Prior Year			1.4
Gross Decreases - Prior Year	(2.4)	(0.3)
Lapse of Statute of Limitations	(7.8)	(7.0)	(6.5)
Ending Balance	67.1	65.8	61.8
CL&P
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance	26.2	25.8	23.1
Gross Increases - Current Year	3.5	3.8	4.6
Gross Increases - Prior Year			0.7
Gross Decreases - Prior Year	(0.9)	(0.6)
Lapse of Statute of Limitations	(3.3)	(2.8)	(2.6)
Ending Balance	$ 25.5	$ 26.2	$ 25.8

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COMMITMENTS AND CONTINGENCIES - Schedule of Reconciliation of Activity in Environmental Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrual for Environmental Loss Contingencies, Beginning Balance	$ 115.4	$ 102.4
Additions	12.6	23.4
Payments/Reductions	(5.4)	(10.4)
Accrual for Environmental Loss Contingencies, Ending Balance	$ 122.6	$ 115.4
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Other Current Liabilities	Other Current Liabilities	Other Current Liabilities
CL&P
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrual for Environmental Loss Contingencies, Beginning Balance	$ 13.9	$ 12.3
Additions	0.9	4.4
Payments/Reductions	(0.9)	(2.8)
Accrual for Environmental Loss Contingencies, Ending Balance	13.9	13.9
NSTAR Electric
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrual for Environmental Loss Contingencies, Beginning Balance	3.3	4.7
Additions	0.4	0.0
Payments/Reductions	(0.3)	(1.4)
Accrual for Environmental Loss Contingencies, Ending Balance	3.4	3.3
PSNH
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrual for Environmental Loss Contingencies, Beginning Balance	6.3	7.1
Additions	0.5	0.0
Payments/Reductions	(0.7)	(0.8)
Accrual for Environmental Loss Contingencies, Ending Balance	$ 6.1	$ 6.3

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COMMITMENTS AND CONTINGENCIES - Schedule of Number of Sites and Reserves (Details) - site	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Number of Sites	59	61
CL&P
Loss Contingencies [Line Items]
Number of Sites	13	14
NSTAR Electric
Loss Contingencies [Line Items]
Number of Sites	10	11
PSNH
Loss Contingencies [Line Items]
Number of Sites	8	9

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COMMITMENTS AND CONTINGENCIES - Environmental Matters Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) site	Dec. 31, 2021 USD ($) site	Dec. 31, 2020 USD ($)
Loss Contingencies [Line Items]
Number of sites | site	59	61
Reserve	$ 122.6	$ 115.4	$ 102.4
CL&P
Loss Contingencies [Line Items]
Number of sites | site	13	14
Reserve	$ 13.9	$ 13.9	12.3
NSTAR Electric
Loss Contingencies [Line Items]
Number of sites | site	10	11
Reserve	$ 3.4	$ 3.3	4.7
PSNH
Loss Contingencies [Line Items]
Number of sites | site	8	9
Reserve	$ 6.1	$ 6.3	$ 7.1
MGP Site accrual
Loss Contingencies [Line Items]
Reserve balances related to former MGP sites	$ 112.6	$ 105.6
Environmental Sites for Which a Range of Loss Exists
Loss Contingencies [Line Items]
Number of sites | site	7
Reserve	$ 29.9
Best estimate of potential remediation costs (up to)	$ 17.0
Environmental Sites for Which a Range of Loss Exists | CL&P
Loss Contingencies [Line Items]
Number of sites | site	1
Reserve	$ 0.6
Best estimate of potential remediation costs (up to)	$ 0.3
Environmental Site for Which a Range is Too Early to Determine
Loss Contingencies [Line Items]
Number of sites | site	15
Reserve	$ 25.8
Environmental Site for Which a Range is Too Early to Determine | CL&P
Loss Contingencies [Line Items]
Number of sites | site	7
Reserve	$ 4.4
Environmental Site for Which a Range is Too Early to Determine | NSTAR Electric
Loss Contingencies [Line Items]
Number of sites | site	1
Reserve	$ 0.1
Evironmental Sites with Best Estimate
Loss Contingencies [Line Items]
Number of sites | site	37
Reserve	$ 66.9
Evironmental Sites with Best Estimate | CL&P
Loss Contingencies [Line Items]
Reserve	$ 8.9
Environmental site quantity remaining | site	5
Evironmental Sites with Best Estimate | NSTAR Electric
Loss Contingencies [Line Items]
Reserve	$ 3.3
Environmental site quantity remaining | site	9
Evironmental Sites with Best Estimate | PSNH
Loss Contingencies [Line Items]
Reserve	$ 6.1
Environmental site quantity remaining | site	8

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COMMITMENTS AND CONTINGENCIES - Schedule of Estimated Future Annual Costs of Long term Contractual Agreement (Details) $ in Millions	Dec. 31, 2022 USD ($)
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	$ 1,324.6
2024	1,500.6
2025	1,411.4
2026	1,323.0
2027	1,304.6
Thereafter	9,685.9
Total	16,550.1
Renewable Energy Purchase Contracts
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	751.8
2024	952.6
2025	954.8
2026	983.0
2027	998.5
Thereafter	8,141.1
Total	12,781.8
Natural Gas Procurement
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	447.1
2024	419.4
2025	340.9
2026	298.5
2027	269.4
Thereafter	1,450.6
Total	3,225.9
Purchased Power and Capacity
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	87.6
2024	86.8
2025	75.2
2026	2.9
2027	2.7
Thereafter	7.2
Total	262.4
Peaker CfDs
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	20.3
2024	21.1
2025	17.9
2026	16.0
2027	11.4
Thereafter	64.4
Total	151.1
Transmission Support Commitments
Transmission Support Commitments
2023	17.8
2024	20.7
2025	22.6
2026	22.6
2027	22.6
Thereafter	22.6
Total	128.9
CL&P
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	705.6
2024	722.3
2025	709.4
2026	632.6
2027	629.3
Thereafter	2,326.4
Total	5,725.6
CL&P | Renewable Energy Purchase Contracts
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	594.8
2024	609.1
2025	610.2
2026	607.6
2027	609.0
Thereafter	2,253.1
Total	5,283.8
CL&P | Purchased Power and Capacity
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	83.5
2024	83.9
2025	72.4
2026	0.1
2027	0.0
Thereafter	0.0
Total	239.9
CL&P | Peaker CfDs
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	20.3
2024	21.1
2025	17.9
2026	16.0
2027	11.4
Thereafter	64.4
Total	151.1
CL&P | Transmission Support Commitments
Transmission Support Commitments
2023	7.0
2024	8.2
2025	8.9
2026	8.9
2027	8.9
Thereafter	8.9
Total	50.8
NSTAR Electric
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	89.1
2024	281.0
2025	328.2
2026	334.6
2027	340.2
Thereafter	5,535.9
Total	6,909.0
NSTAR Electric | Renewable Energy Purchase Contracts
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	79.2
2024	270.0
2025	316.5
2026	322.9
2027	328.6
Thereafter	5,519.8
Total	6,837.0
NSTAR Electric | Purchased Power and Capacity
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	2.9
2024	2.9
2025	2.8
2026	2.8
2027	2.7
Thereafter	7.2
Total	21.3
NSTAR Electric | Transmission Support Commitments
Transmission Support Commitments
2023	7.0
2024	8.1
2025	8.9
2026	8.9
2027	8.9
Thereafter	8.9
Total	50.7
PSNH
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	82.8
2024	77.9
2025	32.9
2026	57.3
2027	65.7
Thereafter	373.0
Total	689.6
PSNH | Renewable Energy Purchase Contracts
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	77.8
2024	73.5
2025	28.1
2026	52.5
2027	60.9
Thereafter	368.2
Total	661.0
PSNH | Purchased Power and Capacity
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
2023	1.2
2024	0.0
2025	0.0
2026	0.0
2027	0.0
Thereafter	0.0
Total	1.2
PSNH | Transmission Support Commitments
Transmission Support Commitments
2023	3.8
2024	4.4
2025	4.8
2026	4.8
2027	4.8
Thereafter	4.8
Total	$ 27.4

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COMMITMENTS AND CONTINGENCIES - Long-Term Contractual Arrangement Narrative (Details) MWh in Millions, $ in Millions					12 Months Ended
	Oct. 31, 2020	Nov. 22, 2019 MW	Mar. 15, 2019 MW	Dec. 28, 2018 MWh	Dec. 31, 2022 USD ($) MW contract
Long-term Purchase Commitment [Line Items]
Estimated cost of energy purchase contracts					$ 16,550.1
Contract term					20 years
Construction in Progress
Long-term Purchase Commitment [Line Items]
Total construction contract cost					$ 6,700.0
Minimum
Long-term Purchase Commitment [Line Items]
Estimated costs under construction contract					150.0
Maximum
Long-term Purchase Commitment [Line Items]
Estimated costs under construction contract					415.0
Peaker Contracts For Differences
Long-term Purchase Commitment [Line Items]
Estimated cost of energy purchase contracts					$ 151.1
Percentage of costs and benefits borne by United Illuminated Company					20.00%
Period of payment to generation facility owner					30 years
CL&P
Long-term Purchase Commitment [Line Items]
Estimated cost of energy purchase contracts					$ 5,725.6
CL&P | Peaker Contracts For Differences
Long-term Purchase Commitment [Line Items]
Estimated cost of energy purchase contracts					$ 151.1
Number of capacity contracts | contract					3
Amount of peaking capacity contracts (in MW) | MW					500
Percentage of costs and benefits borne					80.00%
CL&P, NSTAR Electric and PSNH | Transmission Support Commitments
Long-term Purchase Commitment [Line Items]
Period of payment of annual operation and maintenance expense	20 years				30 years
NSTAR Electric
Long-term Purchase Commitment [Line Items]
Contract term					20 years
Estimated cost of energy purchase contracts					$ 6,909.0
NSTAR Electric | Construction in Progress
Long-term Purchase Commitment [Line Items]
Total construction contract cost					6,000.0
NSTAR Electric | Minimum
Long-term Purchase Commitment [Line Items]
Estimated costs under construction contract					240.0
NSTAR Electric | Maximum
Long-term Purchase Commitment [Line Items]
Estimated costs under construction contract					375.0
Millstone Nuclear Power Station and Seabrook Nuclear Power Plant
Long-term Purchase Commitment [Line Items]
Estimated cost of energy purchase contracts					$ 2,900.0
Milestone Nuclear Power Station
Long-term Purchase Commitment [Line Items]
Annual purchase requirement (in MWh) | MWh				9
Percent of the facility's output required to be purchased			50.00%
Nameplate capacity (in MW) | MW			2,112
Milestone Nuclear Power Station | CL&P
Long-term Purchase Commitment [Line Items]
Contract term				10 years
Percent of the facility's output required to be purchased			40.00%
Milestone Nuclear Power Station | UI
Long-term Purchase Commitment [Line Items]
Contract term				10 years
Seabrook Nuclear Power Plant
Long-term Purchase Commitment [Line Items]
Percent of the facility's output required to be purchased		18.00%
Nameplate capacity (in MW) | MW		1,250
Seabrook Nuclear Power Plant | CL&P
Long-term Purchase Commitment [Line Items]
Contract term				8 years
Percent of the facility's output required to be purchased		15.00%
Seabrook Nuclear Power Plant | UI
Long-term Purchase Commitment [Line Items]
Contract term				8 years
Vineyard Wind Project | NSTAR Electric
Long-term Purchase Commitment [Line Items]
Nameplate capacity (in MW) | MW					800
Contract term					20 years

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COMMITMENTS AND CONTINGENCIES - Schedule of Total Costs Incurred (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Long-term Purchase Commitment [Line Items]
Renewable Energy Purchase Contracts	$ 678.1	$ 609.2	$ 584.2
Natural Gas Procurement	1,042.8	712.7	453.4
Purchased Power and Capacity	61.6	56.4	62.7
Peaker CfDs	13.4	24.3	22.7
Transmission Support Commitments	12.7	15.4	22.1
CL&P
Long-term Purchase Commitment [Line Items]
Renewable Energy Purchase Contracts	513.2	457.1	426.3
Purchased Power and Capacity	57.7	53.1	59.3
Peaker CfDs	13.4	24.3	22.7
Transmission Support Commitments	5.0	6.1	8.7
NSTAR Electric
Long-term Purchase Commitment [Line Items]
Renewable Energy Purchase Contracts	90.8	84.7	88.8
Purchased Power and Capacity	3.0	3.0	3.1
Peaker CfDs	0.0	0.0	0.0
Transmission Support Commitments	5.0	6.0	8.7
PSNH
Long-term Purchase Commitment [Line Items]
Renewable Energy Purchase Contracts	74.1	67.4	69.1
Purchased Power and Capacity	0.9	0.3	0.3
Peaker CfDs	0.0	0.0	0.0
Transmission Support Commitments	$ 2.7	$ 3.3	$ 4.7

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

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COMMITMENTS AND CONTINGENCIES - Schedule of Guarantees and Indemnifications (Details) $ in Millions	1 Months Ended
	Jan. 31, 2022 USD ($) letterOfCredit	Jan. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 16, 2020 USD ($)
Guarantor Obligations [Line Items]
Exposure of guarantee			$ 4.2	$ 7.3
Eversource Investment LLC | Letter of Credit
Guarantor Obligations [Line Items]
Maximum borrowing capacity					$ 25.0
North East Offshore LLC
Guarantor Obligations [Line Items]
Ownership interest (in percent)			50.00%
Revolution Wind, LLC
Guarantor Obligations [Line Items]
Maximum Exposure			$ 546.7
Ownership interest (in percent)			50.00%
South Fork Wind, LLC
Guarantor Obligations [Line Items]
Maximum Exposure			$ 7.1
Ownership interest (in percent)			50.00%
Construction-related purchase agreements with third-party contractors | Sunrise Wind LLC
Guarantor Obligations [Line Items]
Maximum Exposure			$ 465.8
Ownership interest (in percent)			50.00%
Construction-related purchase agreements with third-party contractors | South Fork Wind, LLC
Guarantor Obligations [Line Items]
Maximum Exposure			$ 207.7
Ownership interest (in percent)			50.00%
OREC Capacity Production | Sunrise Wind LLC
Guarantor Obligations [Line Items]
Maximum Exposure			$ 15.4
Ownership interest (in percent)			50.00%
Exposure of guarantee			$ 2.2
OREC Capacity Production | Sunrise Wind LLC | Subsequent Event
Guarantor Obligations [Line Items]
Exposure of guarantee		$ 11.0
North East Offshore LLC | Construction-related purchase agreements with third-party contractors
Guarantor Obligations [Line Items]
Maximum Exposure			717.6
North East Offshore LLC | Performance Guarantee
Guarantor Obligations [Line Items]
Maximum Exposure			$ 1,300.0
Percent of obligations guaranteed			50.00%
North East Offshore LLC | Payment Guarantee
Guarantor Obligations [Line Items]
Maximum Exposure			$ 62.5
Percent of obligations guaranteed			50.00%
Sunrise Wind LLC | Construction-related purchase agreements with third-party contractors
Guarantor Obligations [Line Items]
Maximum Exposure			$ 311.5
Sunrise Wind LLC | OREC Capacity Production
Guarantor Obligations [Line Items]
Maximum Exposure			2.2
Revolution Wind, LLC | Construction-related purchase agreements with third-party contractors
Guarantor Obligations [Line Items]
Maximum Exposure			419.1
South Fork Wind, LLC
Guarantor Obligations [Line Items]
Letters of credit issued | letterOfCredit	2
South Fork Wind, LLC | Letter of Credit
Guarantor Obligations [Line Items]
Line of credit outstanding	$ 4.3
South Fork Wind, LLC | Construction-related purchase agreements with third-party contractors
Guarantor Obligations [Line Items]
Maximum Exposure			142.1
South Fork Wind, LLC | Power Purchase Agreement Security
Guarantor Obligations [Line Items]
Maximum Exposure			7.1
South Fork Wind, LLC | Transmission interconnection
Guarantor Obligations [Line Items]
Maximum Exposure			$ 1.2
Eversource Investment LLC | North East Offshore LLC
Guarantor Obligations [Line Items]
Ownership interest (in percent)			50.00%
Eversource Investment LLC | Funding and Indemnification Obligations
Guarantor Obligations [Line Items]
Maximum Exposure			$ 77.0
Eversource Investment LLC | Funding and Indemnification Obligations | North East Offshore LLC
Guarantor Obligations [Line Items]
Maximum Exposure			910.0
Eversource Investment LLC | Letters of Credit
Guarantor Obligations [Line Items]
Maximum Exposure			4.3
Bay State Wind LLC | Real estate purchase
Guarantor Obligations [Line Items]
Maximum Exposure			2.5
Various | Surety Bonds
Guarantor Obligations [Line Items]
Maximum Exposure			35.7
Eversource Service | Lease payments for real estate
Guarantor Obligations [Line Items]
Maximum Exposure			$ 0.5

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COMMITMENTS AND CONTINGENCIES - Guarantees and Obligations Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 14, 2022	Nov. 30, 2022	Jun. 14, 2022
Line of Credit | PSNH
Loss Contingencies [Line Items]
Amount of long-term debt requested for issuance		$ 600.0
Line of Credit | CL&P
Loss Contingencies [Line Items]
Amount of long-term debt requested for issuance			$ 1,150.0
Line of Credit | NSTAR Gas
Loss Contingencies [Line Items]
Amount of long-term debt requested for issuance				$ 325.0
Sunrise Wind LLC | Forecast | Subsequent Event
Loss Contingencies [Line Items]
Maximum exposure	$ 58.1

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COMMITMENTS AND CONTINGENCIES - FERC ROE Complaints Narrative (Details) $ in Millions			12 Months Ended	30 Months Ended	36 Months Ended
	Oct. 16, 2018 complaint	Apr. 29, 2016 complaint	Dec. 31, 2022 USD ($)	Apr. 14, 2017	Oct. 15, 2014	Dec. 31, 2021 USD ($)	Jul. 31, 2014 complaint
Loss Contingencies [Line Items]
Percentage of base ROE reasonably justified	10.41%
Percentage of incentive cap on total ROE	13.08%
FERC ROE Complaints
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | complaint	4	4
Period of complaint			15 months
Basis point change			0.10%
Estimate of possible loss for each 10 basis point change to base ROE			$ 3.0
Complaint period			15 months
FERC ROE First, Second and Third Complaints
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | complaint							3
Base ROE percentage challenged by complainants			11.14%
Percentage of ROE for any incentive project	13.08%
FERC ROE First Complaint
Loss Contingencies [Line Items]
Percentage of ROE for any incentive project				11.74%
Refund payments			$ 38.9
FERC ROE Second Complaint
Loss Contingencies [Line Items]
Percentage of base ROE of complaint period			10.57%	10.57%
Percentage of ROE for any incentive project			11.74%
Loss contingency, estimate of possible earnings impact			$ 39.1
FERC ROE Fourth Complaint
Loss Contingencies [Line Items]
Percentage of base ROE of complaint period		10.57%
Maximum percentage cap of ROE for incentive projects		11.74%
Percentage of ROE for any incentive project			10.57%
Original base ROE authorized by FERC at time of complaint			11.74%
FERC MISO Complaints
Loss Contingencies [Line Items]
Loss contingency, pending claims, number | complaint	2
CL&P | FERC ROE First Complaint
Loss Contingencies [Line Items]
Refund payments			$ 22.4
CL&P | FERC ROE Second Complaint
Loss Contingencies [Line Items]
Loss contingency, estimate of possible earnings impact			21.4			$ 21.4
NSTAR Electric | FERC ROE First Complaint
Loss Contingencies [Line Items]
Refund payments			13.7
NSTAR Electric | FERC ROE Second Complaint
Loss Contingencies [Line Items]
Loss contingency, estimate of possible earnings impact			14.6			14.6
PSNH | FERC ROE First Complaint
Loss Contingencies [Line Items]
Refund payments			2.8
PSNH | FERC ROE Second Complaint
Loss Contingencies [Line Items]
Loss contingency, estimate of possible earnings impact			$ 3.1			$ 3.1
Minimum | FERC ROE First, Second and Third Complaints
Loss Contingencies [Line Items]
Percentage of ROE for any incentive project					11.14%
Maximum | FERC ROE First, Second and Third Complaints
Loss Contingencies [Line Items]
Percentage of ROE for any incentive project					13.10%

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COMMITMENTS AND CONTINGENCIES - Eversource and NSTAR Electric Boston Harbor Civil Action Narrative (Details)	Jul. 15, 2016 kV
Commitments and Contingencies Disclosure [Abstract]
Amount of capacity required for installation of distribution cable (in kV)	115

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COMMITMENTS AND CONTINGENCIES - CL&P Tropical Storm Isaias Response Investigation (Details) $ in Millions	Jul. 14, 2021 USD ($)	May 07, 2021	Apr. 28, 2021
Loss Contingencies [Line Items]
Loss contingency, allowed rate of ROE, downward adjustment			0.0090
Loss contingency, allowed rate of ROE (in percent)			9.25%
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Non-compliance fine	$ 28.6
Loss contingency, accident reporting violation fines	$ 0.2
Loss contingency, penalty rate as a percent of distribution revenues		2.50%

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COMMITMENTS AND CONTINGENCIES - CL&P Comprehensive Settlement Agreement (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Oct. 01, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2022	Dec. 31, 2019
Loss Contingencies [Line Items]
Bill of forgiveness		$ 521,752	$ 221,008	$ 264,950		$ 117,063
Regulatory Liabilities		890,786	602,432
Loss related to litigation settlement		(72,041)	81,274	0
Basis points reduction to return on equity, scenario one	0.90%
Basis points reduction to return on equity, scenario two	0.45%
CL&P
Loss Contingencies [Line Items]
Bill of forgiveness		20,327	74,788	99,809		$ 4,971
Regulatory Liabilities		336,048	266,489
Loss related to litigation settlement		(72,041)	81,274	$ 0
CL&P | Customer Assistance Fund
Loss Contingencies [Line Items]
Bill of forgiveness					$ 10,000
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Loss related to litigation settlement		103,600
Customer credits and assistance	$ 75,000
Loss related to litigation settlement, net of tax		$ 86,100
Loss contingency, after-tax earnings impact per share (in dollars per share)		$ 0.25
Unfavorable Regulatory Action | Sales
Loss Contingencies [Line Items]
Loss related to litigation settlement		$ 65,000
Unfavorable Regulatory Action | Oil and Gas, Operation and Maintenance
Loss Contingencies [Line Items]
Loss related to litigation settlement		10,000
Unfavorable Regulatory Action | CL&P
Loss Contingencies [Line Items]
Customer credits	65,000
Customer assistance initiatives	$ 10,000
Regulatory Liabilities		75,000	75,000
Unfavorable Regulatory Action | CL&P | Sales
Loss Contingencies [Line Items]
Loss related to litigation settlement			$ 65,000
Unfavorable Regulatory Action | CL&P | Oil and Gas, Operation and Maintenance
Loss Contingencies [Line Items]
Loss related to litigation settlement		$ 10,000

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LEASES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Right-of-use assets in exchange for the assumption of new operating lease liabilities	$ 18.9	$ 2.1	$ 0.6
Right-of-use assets in exchange for the assumption of new finance lease liabilities	$ 3.5	2.3	0.7
CMA
Lessee, Lease, Description [Line Items]
Right-of-use assets in exchange for the assumption of new operating lease liabilities			14.7
Right-of-use assets in exchange for the assumption of new finance lease liabilities			54.2
Minimum
Lessee, Lease, Description [Line Items]
Renewal period	1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal period	20 years
CL&P
Lessee, Lease, Description [Line Items]
Right-of-use assets in exchange for the assumption of new operating lease liabilities	$ 2.4	0.0	0.1
Right-of-use assets in exchange for the assumption of new finance lease liabilities	$ 0.0	0.0	0.0
CL&P | Minimum
Lessee, Lease, Description [Line Items]
Renewal period	1 year
CL&P | Maximum
Lessee, Lease, Description [Line Items]
Renewal period	20 years
NSTAR Electric
Lessee, Lease, Description [Line Items]
Right-of-use assets in exchange for the assumption of new operating lease liabilities	$ 0.0	1.9	0.2
Right-of-use assets in exchange for the assumption of new finance lease liabilities	$ 0.0	0.0	0.3
NSTAR Electric | Minimum
Lessee, Lease, Description [Line Items]
Renewal period	1 year
NSTAR Electric | Maximum
Lessee, Lease, Description [Line Items]
Renewal period	20 years
PSNH
Lessee, Lease, Description [Line Items]
Right-of-use assets in exchange for the assumption of new operating lease liabilities	$ 0.0	0.0	0.0
Right-of-use assets in exchange for the assumption of new finance lease liabilities	$ 0.0	$ 0.0	$ 0.0
PSNH | Minimum
Lessee, Lease, Description [Line Items]
Renewal period	1 year
PSNH | Maximum
Lessee, Lease, Description [Line Items]
Renewal period	20 years

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LEASES - Components of Lease Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lease, Cost [Abstract]
Amortization of Right-of-use-Assets	$ 8.3	$ 4.6	$ 2.6
Interest on Lease Liabilities	2.0	3.9	1.4
Total Finance Lease Cost	10.3	8.5	4.0
Operating Lease Cost	11.6	12.2	11.1
Variable Lease Cost	78.1	61.0	57.8
Total Lease Cost	100.0	81.7	72.9
CL&P
Lease, Cost [Abstract]
Amortization of Right-of-use-Assets	0.0	0.5	0.7
Interest on Lease Liabilities	0.0	0.1	0.3
Total Finance Lease Cost	0.0	0.6	1.0
Operating Lease Cost	0.3	0.3	0.6
Variable Lease Cost	25.6	16.2	12.2
Total Lease Cost	25.9	17.1	13.8
NSTAR Electric
Lease, Cost [Abstract]
Amortization of Right-of-use-Assets	0.2	0.2	0.2
Interest on Lease Liabilities	0.6	0.6	0.6
Total Finance Lease Cost	0.8	0.8	0.8
Operating Lease Cost	2.3	2.3	2.1
Variable Lease Cost	0.0	0.0	0.0
Total Lease Cost	3.1	3.1	2.9
PSNH
Lease, Cost [Abstract]
Amortization of Right-of-use-Assets	0.1	0.1	0.1
Interest on Lease Liabilities	0.0	0.0	0.0
Total Finance Lease Cost	0.1	0.1	0.1
Operating Lease Cost	0.1	0.1	0.1
Variable Lease Cost	52.5	44.8	45.6
Total Lease Cost	$ 52.7	$ 45.0	$ 45.8

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LEASES - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating Leases:
Right-of-use-Assets, Net	$ 56.9	$ 47.2
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-Term Assets	Other Long-Term Assets
Current Portion	$ 9.0	$ 10.0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Current Liabilities	Other Current Liabilities
Long-Term	$ 47.9	$ 37.2
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Long-Term Liabilities	Other Long-Term Liabilities
Total Operating Lease Liabilities	$ 56.9	$ 47.2
Finance Leases:
Right-of-use-Assets, Net	$ 54.5	$ 58.0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Current Portion	$ 3.8	$ 3.9
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Current Liabilities	Other Current Liabilities
Long-Term	$ 54.2	$ 55.4
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Long-Term Liabilities	Other Long-Term Liabilities
Total Finance Lease Liabilities	$ 58.0	$ 59.3
CL&P
Operating Leases:
Right-of-use-Assets, Net	2.2	0.1
Current Portion	0.6	0.1
Long-Term	1.6	0.0
Total Operating Lease Liabilities	2.2	0.1
Finance Leases:
Right-of-use-Assets, Net	0.0	0.0
Current Portion	0.0	0.0
Long-Term	0.0	0.0
Total Finance Lease Liabilities	0.0	0.0
NSTAR Electric
Operating Leases:
Right-of-use-Assets, Net	22.5	24.3
Current Portion	1.2	1.1
Long-Term	21.3	23.2
Total Operating Lease Liabilities	22.5	24.3
Finance Leases:
Right-of-use-Assets, Net	3.2	3.3
Current Portion	0.0	0.0
Long-Term	4.9	4.9
Total Finance Lease Liabilities	4.9	4.9
PSNH
Operating Leases:
Right-of-use-Assets, Net	0.0	0.3
Current Portion	0.0	0.0
Long-Term	0.0	0.3
Total Operating Lease Liabilities	0.0	0.3
Finance Leases:
Right-of-use-Assets, Net	0.0	0.7
Current Portion	0.0	0.1
Long-Term	0.0	0.6
Total Finance Lease Liabilities	$ 0.0	$ 0.7

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LEASES - Other Information Related to Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Weighted-Average Remaining Lease Term (Years):
Operating Leases	11 years	13 years
Finance Leases	15 years	16 years
Weighted-Average Discount Rate (Percentage):
Operating Leases	3.20%	4.10%
Finance Leases	2.70%	2.70%
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$ 11.3	$ 12.1	$ 10.9
Operating Cash Flows from Finance Leases	2.0	3.4	1.7
Financing Cash Flows from Finance Leases	3.9	4.1	2.8
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	18.9	2.1	0.6
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	$ 3.5	$ 2.3	0.7
CL&P
Weighted-Average Remaining Lease Term (Years):
Operating Leases	4 years	7 years
Weighted-Average Discount Rate (Percentage):
Operating Leases	3.80%	3.00%
Finance Leases	0.00%	0.00%
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$ 0.3	$ 0.3	0.6
Operating Cash Flows from Finance Leases	0.0	0.1	0.3
Financing Cash Flows from Finance Leases	0.0	1.4	1.6
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	2.4	0.0	0.1
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	$ 0.0	$ 0.0	0.0
NSTAR Electric
Weighted-Average Remaining Lease Term (Years):
Operating Leases	17 years	18 years
Finance Leases	19 years	20 years
Weighted-Average Discount Rate (Percentage):
Operating Leases	4.00%	4.00%
Finance Leases	2.90%	2.90%
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$ 2.1	$ 2.1	1.8
Operating Cash Flows from Finance Leases	0.6	0.6	0.6
Financing Cash Flows from Finance Leases	0.0	0.0	0.0
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	0.0	1.9	0.2
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	$ 0.0	$ 0.0	0.3
PSNH
Weighted-Average Remaining Lease Term (Years):
Operating Leases		7 years
Finance Leases		7 years
Weighted-Average Discount Rate (Percentage):
Operating Leases	0.00%	3.70%
Finance Leases	0.00%	3.50%
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:
Operating Cash Flows from Operating Leases	$ 0.1	$ 0.1	0.1
Operating Cash Flows from Finance Leases	0.0	0.0	0.0
Financing Cash Flows from Finance Leases	0.1	0.1	0.1
Supplemental Non-Cash Information on Lease Liabilities:
Right-of-use-Assets Obtained in Exchange for New Operating Lease Liabilities	0.0	0.0	0.0
Right-of-use-Assets Obtained in Exchange for New Finance Lease Liabilities	$ 0.0	$ 0.0	$ 0.0

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LEASES - Future Minimum Lease Payments under Long-Term Leases (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating Leases
2023	$ 10.3
2024	9.3
2025	6.4
2026	5.5
2027	5.2
Thereafter	31.2
Future lease payments	67.9
Less amount representing interest	11.0
Present value of future minimum lease payments	56.9	$ 47.2
Finance Leases
2023	5.9
2024	5.9
2025	5.9
2026	5.4
2027	5.4
Thereafter	50.9
Future lease payments	79.4
Less amount representing interest	21.4
Present value of future minimum lease payments	58.0	59.3
CL&P
Operating Leases
2023	0.7
2024	0.7
2025	0.7
2026	0.3
2027	0.0
Thereafter	0.0
Future lease payments	2.4
Less amount representing interest	0.2
Present value of future minimum lease payments	2.2	0.1
Finance Leases
Present value of future minimum lease payments	0.0	0.0
NSTAR Electric
Operating Leases
2023	2.1
2024	2.1
2025	1.7
2026	1.7
2027	1.7
Thereafter	23.6
Future lease payments	32.9
Less amount representing interest	10.4
Present value of future minimum lease payments	22.5	24.3
Finance Leases
2023	0.6
2024	0.6
2025	0.6
2026	0.7
2027	0.7
Thereafter	11.8
Future lease payments	15.0
Less amount representing interest	10.1
Present value of future minimum lease payments	$ 4.9	$ 4.9

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FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	$ 155,570	$ 155,570
Rate Reduction Bonds	410,492	453,702
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	155,600	155,600
Long-Term Debt	21,044,100	18,216,700
Rate Reduction Bonds	453,700	496,900
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	136,700	166,300
Long-Term Debt	18,891,300	19,636,300
Rate Reduction Bonds	424,700	543,300
CL&P
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	116,200	116,200
CL&P | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	116,200	116,200
Long-Term Debt	4,216,500	4,215,400
Rate Reduction Bonds	0	0
CL&P | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	99,200	122,300
Long-Term Debt	3,828,300	4,848,900
CL&P | Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Rate Reduction Bonds	0	0
NSTAR Electric
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	43,000	43,000
NSTAR Electric | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	43,000	43,000
Long-Term Debt	4,425,100	3,985,400
Rate Reduction Bonds	0	0
NSTAR Electric | Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	37,500	44,000
Long-Term Debt	4,091,800	4,453,500
NSTAR Electric | Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Rate Reduction Bonds	0	0
PSNH
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Rate Reduction Bonds	410,492	453,702
PSNH | Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Preferred Stock Not Subject to Mandatory Redemption	0	0
Long-Term Debt	1,164,600	1,163,800
Rate Reduction Bonds	453,700	496,900
PSNH | Fair Value
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	970,500	1,220,600
Rate Reduction Bonds	$ 424,700	$ 543,300

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ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) - Schedule of Changes in AOCI By Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 14,599,844	$ 14,063,566
OCI Before Reclassifications	(4,100)	23,400
Amounts Reclassified from AOCI	7,000	10,700
Net OCI	2,900	34,100
Ending balance	15,473,158	14,599,844
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(42,275)	(76,411)
Ending balance	(39,421)	(42,275)
Qualified Cash Flow Hedging Instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(400)	(1,400)
OCI Before Reclassifications	0	0
Amounts Reclassified from AOCI	0	1,000
Net OCI	0	1,000
Ending balance	(400)	(400)
Unrealized Gains/(Losses) on Marketable Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	400	1,100
OCI Before Reclassifications	(1,600)	(700)
Amounts Reclassified from AOCI	0	0
Net OCI	(1,600)	(700)
Ending balance	(1,200)	400
Defined Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(42,300)	(76,100)
OCI Before Reclassifications	(2,500)	24,100
Amounts Reclassified from AOCI	7,000	9,700
Net OCI	4,500	33,800
Ending balance	$ (37,800)	$ (42,300)

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ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Equity [Abstract]
Related tax effect recognized in AOCI	$ 1.3	$ 8.3	$ 6.0

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ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) - Schedule of Amounts Reclassified From AOCI By Component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax Effect	$ (453,574)	$ (344,223)	$ (346,186)
Net Income Attributable to Common Shareholders	1,404,875	1,220,527	1,205,167
Defined Benefit Plan Costs:
Total Amounts Reclassified from AOCI, Net of Tax	(7,000)	(10,700)	(7,900)
Qualified Cash Flow Hedging Instruments, Net of Tax | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax Effect	0	700	900
Net Income Attributable to Common Shareholders	0	(1,000)	(1,600)
Amortization of Actuarial Losses
Defined Benefit Plan Costs:
Reclassifications from AOCI	(9,000)	(13,100)	(8,100)
Amortization of Prior Service Cost
Defined Benefit Plan Costs:
Reclassifications from AOCI	(300)	0	(300)
Defined Benefit Plans
Defined Benefit Plan Costs:
Reclassifications from AOCI	(9,300)	(13,100)	(8,400)
Tax Effect	2,300	3,400	2,100
Total Amounts Reclassified from AOCI, Net of Tax	(7,000)	(9,700)	(6,300)
Interest Expense | Qualified Cash Flow Hedging Instruments, Net of Tax | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Qualified Cash Flow Hedging Instruments	$ 0	$ (1,700)	$ (2,500)

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DIVIDEND RESTRICTIONS (Details) $ in Millions	Dec. 31, 2022 USD ($)
Schedule of Restrictions on Retained Earnings [Line Items]
Consolidated total debt to total capital ratio (as a percentage)	0.65
Retained earnings subject to restrictions	$ 5,530.0
CL&P
Schedule of Restrictions on Retained Earnings [Line Items]
Retained earnings subject to restrictions	2,460.0
NSTAR Electric
Schedule of Restrictions on Retained Earnings [Line Items]
Retained earnings subject to restrictions	2,920.0
PSNH
Schedule of Restrictions on Retained Earnings [Line Items]
Retained earnings subject to restrictions	$ 572.1

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COMMON SHARES - Common Shares Authorized and Issued (Details) - $ / shares	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Per share par value (in dollars per share)	$ 5	$ 5	$ 5
Authorized (in shares)	380,000,000	380,000,000
Issued (in shares)	359,984,073	357,818,402
CL&P
Class of Stock [Line Items]
Per share 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]
Per share 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]
Per share par value (in dollars per share)	$ 1	$ 1
Authorized (in shares)	100,000,000	100,000,000
Issued (in shares)	301	301

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COMMON SHARES - Narrative (Details) - USD ($) $ in Thousands				12 Months Ended
	Oct. 03, 2022	May 11, 2022	Dec. 01, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Maximum amount of stock to be issued		$ 1,200,000
Equity offering (in shares)				2,165,671
Consideration received from sale of stock				$ 197,100
Treasury stock (in shares)				11,540,218	13,415,206
Common stock outstanding (in shares)				348,443,855	344,403,196
Issuance of treasury shares for acquisition			$ 38,100	$ 72,133	$ 38,051
Subsidiaries | The Torrington Water Company (TWC)
Class of Stock [Line Items]
Purchase price	$ 72,100
Common Shares
Class of Stock [Line Items]
Common stock outstanding (in shares)				348,443,855	344,403,196	342,954,023	329,880,645
Issuance of treasury shares for acquisition (in shares)			462,517	925,264	462,517

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PREFERRED STOCK NOT SUBJECT TO MANDATORY REDEMPTION - Narrative (Details)	Dec. 31, 2022 $ / shares shares
CL&P
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares) | shares	9,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 50
NSTAR Electric
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares) | shares	2,890,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 100

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PREFERRED STOCK NOT SUBJECT TO MANDATORY REDEMPTION - Schedule of Preferred Stock by Class (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Preferred stock value outstanding	$ 155.6	$ 155.6
CL&P
Class of Stock [Line Items]
Shares outstanding (in shares)	2,324,000	2,324,000
Preferred stock value outstanding	$ 116.2	$ 116.2
CL&P | Series of 1947 Preferred Stock at $1.90
Class of Stock [Line Items]
Preferred stock, dividend rate, per-dollar-amount (in dollars per share)	$ 1,900,000	$ 1,900,000
Redemption Price Per Share (in dollars per share)	$ 52.50
Shares outstanding (in shares)	163,912	163,912
Preferred stock value outstanding	$ 8.2	$ 8.2
CL&P | Series of 1947 Preferred Stock at $2.00
Class of Stock [Line Items]
Preferred stock, dividend rate, per-dollar-amount (in dollars per share)	$ 2,000,000.00	$ 2,000,000.00
Redemption Price Per Share (in dollars per share)	$ 54.00
Shares outstanding (in shares)	336,088	336,088
Preferred stock value outstanding	$ 16.8	$ 16.8
CL&P | Series of 1949 Preferred Stock at $2.04
Class of Stock [Line Items]
Preferred stock, dividend rate, per-dollar-amount (in dollars per share)	$ 2,040,000.00	$ 2,040,000.00
Redemption Price Per Share (in dollars per share)	$ 52.00
Shares outstanding (in shares)	100,000	100,000
Preferred stock value outstanding	$ 5.0	$ 5.0
CL&P | Series of 1949 Preferred Stock at $2.20
Class of Stock [Line Items]
Preferred stock, dividend rate, per-dollar-amount (in dollars per share)	$ 2,200,000	$ 2,200,000
Redemption Price Per Share (in dollars per share)	$ 52.50
Shares outstanding (in shares)	200,000	200,000
Preferred stock value outstanding	$ 10.0	$ 10.0
CL&P | Series of 1949 Preferred Stock at 3.90%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	3.90%	3.90%
Redemption Price Per Share (in dollars per share)	$ 50.50
Shares outstanding (in shares)	160,000	160,000
Preferred stock value outstanding	$ 8.0	$ 8.0
CL&P | Series E of 1954 Preferred Stock at $2.06
Class of Stock [Line Items]
Preferred stock, dividend rate, per-dollar-amount (in dollars per share)	$ 2,060,000.00	$ 2,060,000.00
Redemption Price Per Share (in dollars per share)	$ 51.00
Shares outstanding (in shares)	200,000	200,000
Preferred stock value outstanding	$ 10.0	$ 10.0
CL&P | Series F of 1955 Preferred Stock at $2.09
Class of Stock [Line Items]
Preferred stock, dividend rate, per-dollar-amount (in dollars per share)	$ 2,090,000.00	$ 2,090,000.00
Redemption Price Per Share (in dollars per share)	$ 51.00
Shares outstanding (in shares)	100,000	100,000
Preferred stock value outstanding	$ 5.0	$ 5.0
CL&P | Series of 1956 Preferred Stock at 4.5%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	4.50%	4.50%
Redemption Price Per Share (in dollars per share)	$ 50.75
Shares outstanding (in shares)	104,000	104,000
Preferred stock value outstanding	$ 5.2	$ 5.2
CL&P | Series of 1958 Preferred Stock at 4.96%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	4.96%	4.96%
Redemption Price Per Share (in dollars per share)	$ 50.50
Shares outstanding (in shares)	100,000	100,000
Preferred stock value outstanding	$ 5.0	$ 5.0
CL&P | Series of 1963 Preferred Stock at 4.5%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	4.50%	4.50%
Redemption Price Per Share (in dollars per share)	$ 50.50
Shares outstanding (in shares)	160,000	160,000
Preferred stock value outstanding	$ 8.0	$ 8.0
CL&P | Series of 1967 Preferred Stock at 5.28%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	5.28%	5.28%
Redemption Price Per Share (in dollars per share)	$ 51.43
Shares outstanding (in shares)	200,000	200,000
Preferred stock value outstanding	$ 10.0	$ 10.0
CL&P | Series G of 1968 Preferred Stock at $3.24
Class of Stock [Line Items]
Preferred stock, dividend rate, per-dollar-amount (in dollars per share)	$ 3,240,000	$ 3,240,000
Redemption Price Per Share (in dollars per share)	$ 51.84
Shares outstanding (in shares)	300,000	300,000
Preferred stock value outstanding	$ 15.0	$ 15.0
CL&P | Series of 1968 Preferred Stock at 6.56%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	6.56%	6.56%
Redemption Price Per Share (in dollars per share)	$ 51.44
Shares outstanding (in shares)	200,000	200,000
Preferred stock value outstanding	$ 10.0	$ 10.0
NSTAR Electric
Class of Stock [Line Items]
Shares outstanding (in shares)	430,000	430,000
Preferred stock value outstanding	$ 43.0	$ 43.0
NSTAR Electric | Preferred Stock 4.25%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	4.25%	4.25%
Redemption Price Per Share (in dollars per share)	$ 103.625
Shares outstanding (in shares)	180,000	180,000
Preferred stock value outstanding	$ 18.0	$ 18.0
NSTAR Electric | Preferred Stock 4.78%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	4.78%	4.78%
Redemption Price Per Share (in dollars per share)	$ 102.80
Shares outstanding (in shares)	250,000	250,000
Preferred stock value outstanding	$ 25.0	$ 25.0
Aquarion Water Company | Series of Preferred Stock at 6%
Class of Stock [Line Items]
Preferred stock, dividend rate (as a percentage)	6.00%
Redemption Price Per Share (in dollars per share)	$ 100.00
Shares outstanding (in shares)	23	23
Preferred stock value outstanding	$ 0.0	$ 0.0
Fair Value Adjustment | NSTAR Electric
Class of Stock [Line Items]
Preferred stock value outstanding	$ 3.6	$ 3.6

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COMMON SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interests	$ 1,412,394	$ 1,228,046	$ 1,212,686
Noncontrolling interest - preferred stock of subsidiaries	155,570	155,570
CL&P and NSTAR Electric
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interests	$ 7,500	$ 7,500	$ 7,500

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REVENUES - Operating Revenues Disaggregated by Revenue Source (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	$ 12,270,200	$ 9,815,000	$ 8,766,500
Alternative Revenue Programs	5,300	41,700	130,000
Other Revenues	13,800	6,400	7,900
Operating Revenues	12,289,336	9,863,085	8,904,430
Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	6,142,700	5,123,600	4,741,500
Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	3,614,200	3,041,400	2,772,900
Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	559,200	499,700	425,600
Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	10,316,100	8,664,700	7,940,000
Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	436,000	453,200	340,900
Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,335,500	661,800	374,100
Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	110,600	114,000	111,500
Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	72,000	(78,700)
CL&P
Disaggregation of Revenue [Line Items]
Operating Revenues	4,817,744	3,637,412	3,547,527
NSTAR Electric
Disaggregation of Revenue [Line Items]
Operating Revenues	3,583,070	3,056,350	2,941,148
PSNH
Disaggregation of Revenue [Line Items]
Operating Revenues	1,474,799	1,177,248	1,079,095
Operating Segments | Electric Distribution
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	9,409,500	7,404,000	7,038,600
Alternative Revenue Programs	(15,400)	14,700	88,100
Other Revenues	11,200	4,900	5,600
Operating Revenues	9,405,300	7,423,600	7,132,300
Operating Segments | Electric Distribution | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	4,796,100	3,989,800	3,951,500
Operating Segments | Electric Distribution | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	2,903,300	2,486,100	2,353,400
Operating Segments | Electric Distribution | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	374,900	345,300	327,100
Operating Segments | Electric Distribution | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	8,074,300	6,821,200	6,632,000
Operating Segments | Electric Distribution | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | Electric Distribution | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,190,900	575,800	327,300
Operating Segments | Electric Distribution | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	72,300	78,100	79,300
Operating Segments | Electric Distribution | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	72,000	(71,100)
Operating Segments | Natural Gas Distribution
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	2,199,500	1,752,300	1,162,900
Alternative Revenue Programs	14,800	37,000	44,700
Other Revenues	1,300	300	1,100
Operating Revenues	2,215,600	1,789,600	1,208,700
Operating Segments | Natural Gas Distribution | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,204,900	1,000,300	644,900
Operating Segments | Natural Gas Distribution | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	648,500	497,600	361,900
Operating Segments | Natural Gas Distribution | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	199,700	167,200	107,400
Operating Segments | Natural Gas Distribution | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	2,053,100	1,665,100	1,114,200
Operating Segments | Natural Gas Distribution | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | Natural Gas Distribution | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	140,800	82,100	43,000
Operating Segments | Natural Gas Distribution | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	5,600	5,100	5,700
Operating Segments | Natural Gas Distribution | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0
Operating Segments | Electric Transmission
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,715,300	1,759,900	1,570,600
Alternative Revenue Programs	92,700	(126,100)	(35,200)
Other Revenues	700	800	700
Operating Revenues	1,808,700	1,634,600	1,536,100
Operating Segments | Electric Transmission | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | Electric Transmission | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | Electric Transmission | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | Electric Transmission | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | Electric Transmission | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,700,500	1,751,300	1,557,300
Operating Segments | Electric Transmission | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | Electric Transmission | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	14,100	13,600	13,300
Operating Segments | Electric Transmission | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	700	(5,000)
Operating Segments | Water Distribution
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	224,400	209,400	219,600
Alternative Revenue Programs	(2,500)	1,500	(4,700)
Other Revenues	600	400	500
Operating Revenues	222,500	211,300	215,400
Operating Segments | Water Distribution | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	141,700	133,500	145,100
Operating Segments | Water Distribution | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	66,500	62,800	62,400
Operating Segments | Water Distribution | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	4,700	4,300	4,800
Operating Segments | Water Distribution | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	212,900	200,600	212,300
Operating Segments | Water Distribution | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | Water Distribution | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	3,800	3,900	3,800
Operating Segments | Water Distribution | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	8,400	7,500	3,500
Operating Segments | Water Distribution | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(700)	(2,600)
Operating Segments | CL&P
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	5,343,200	4,238,900	4,044,700
Alternative Revenue Programs	56,500	(78,900)	(4,200)
Other Revenues	1,800	400	2,200
Operating Segments | CL&P | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	2,397,200	1,994,200	2,011,100
Operating Segments | CL&P | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,067,900	890,600	878,300
Operating Segments | CL&P | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	146,400	131,400	137,500
Operating Segments | CL&P | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	3,611,500	3,016,200	3,026,900
Operating Segments | CL&P | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	755,100	863,300	754,800
Operating Segments | CL&P | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	873,700	408,800	230,100
Operating Segments | CL&P | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	30,200	26,700	32,900
Operating Segments | CL&P | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	72,700	(76,100)	0
Operating Segments | NSTAR Electric
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	4,127,300	3,541,600	3,327,500
Alternative Revenue Programs	700	(15,100)	54,500
Other Revenues	7,200	3,400	3,500
Operating Segments | NSTAR Electric | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,601,800	1,375,800	1,365,800
Operating Segments | NSTAR Electric | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,457,400	1,265,000	1,176,800
Operating Segments | NSTAR Electric | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	135,800	119,100	106,400
Operating Segments | NSTAR Electric | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	3,195,000	2,759,900	2,649,000
Operating Segments | NSTAR Electric | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	670,400	616,300	576,500
Operating Segments | NSTAR Electric | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	215,000	109,200	58,400
Operating Segments | NSTAR Electric | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	46,900	56,200	43,600
Operating Segments | NSTAR Electric | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Operating Segments | PSNH
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,659,600	1,387,600	1,241,300
Alternative Revenue Programs	20,100	(17,400)	2,600
Other Revenues	2,900	1,900	600
Operating Segments | PSNH | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	797,100	619,800	574,600
Operating Segments | PSNH | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	380,800	332,200	299,900
Operating Segments | PSNH | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	92,700	94,800	83,200
Operating Segments | PSNH | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,270,600	1,046,800	957,700
Operating Segments | PSNH | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	275,000	271,700	226,000
Operating Segments | PSNH | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	102,200	57,800	38,800
Operating Segments | PSNH | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	11,800	11,300	14,200
Operating Segments | PSNH | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	4,600
Other
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,435,500	1,354,000	1,235,900
Alternative Revenue Programs	0	0	0
Other Revenues	0	0	0
Operating Revenues	1,435,500	1,354,000	1,235,900
Other | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Other | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Other | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Other | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Other | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	86,600	74,200
Other | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Other | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	1,435,500	1,267,400	1,161,700
Other | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0
Eliminations
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(2,714,000)	(2,664,600)	(2,461,100)
Alternative Revenue Programs	(84,300)	114,600	37,100
Other Revenues	0	0	0
Operating Revenues	(2,798,300)	(2,550,000)	(2,424,000)
Eliminations | Residential
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Eliminations | Commercial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(4,100)	(5,100)	(4,800)
Eliminations | Industrial
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(20,100)	(17,100)	(13,700)
Eliminations | Total Retail Tariff Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(24,200)	(22,200)	(18,500)
Eliminations | Wholesale Transmission Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(1,264,500)	(1,384,700)	(1,290,600)
Eliminations | Wholesale Market Sales Revenues
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0	0
Eliminations | Other Revenues from Contracts with Customers
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	(1,425,300)	(1,257,700)	(1,152,000)
Eliminations | Amortization of/(Reserve for) Revenues Subject to Refund
Disaggregation of Revenue [Line Items]
Revenues from Contracts with Customers	0	0
Consolidations Eliminations | CL&P
Disaggregation of Revenue [Line Items]
Operating Revenues	(583,800)	(523,000)	(495,200)
Consolidations Eliminations | NSTAR Electric
Disaggregation of Revenue [Line Items]
Operating Revenues	(552,100)	(473,500)	(444,400)
Consolidations Eliminations | PSNH
Disaggregation of Revenue [Line Items]
Operating Revenues	$ (207,800)	$ (194,900)	$ (165,400)

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REVENUES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	May 06, 2021	Mar. 31, 2021
Loss Contingencies [Line Items]
Revenue	$ 12,270,200	$ 9,815,000	$ 8,766,500
Loss related to litigation settlement	(72,041)	81,274	0
Lease revenue	$ 4,000	$ 4,800	$ 4,300
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Income, Net	Other Income, Net	Other Income, Net
CL&P
Loss Contingencies [Line Items]
Loss related to litigation settlement	$ (72,041)	$ 81,274	$ 0
Lease revenue	800	800	800
NSTAR Electric
Loss Contingencies [Line Items]
Lease revenue	2,500	3,100	2,700
Amortization of/(Reserve for) Revenues Subject to Refund
Loss Contingencies [Line Items]
Revenue	72,000	(78,700)
Operating Segments | CL&P
Loss Contingencies [Line Items]
Revenue	5,343,200	4,238,900	4,044,700
Operating Segments | NSTAR Electric
Loss Contingencies [Line Items]
Revenue	4,127,300	3,541,600	3,327,500
Operating Segments | Amortization of/(Reserve for) Revenues Subject to Refund | CL&P
Loss Contingencies [Line Items]
Revenue	72,700	(76,100)	0
Operating Segments | Amortization of/(Reserve for) Revenues Subject to Refund | NSTAR Electric
Loss Contingencies [Line Items]
Revenue	0	0	$ 0
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Loss related to litigation settlement	103,600
Unfavorable Regulatory Action | CL&P
Loss Contingencies [Line Items]
Loss contingency, estimate of possible earnings impact, non-compliance with performance standards				$ 28,400	$ 28,400
Unfavorable Regulatory Action | Operating Segments | Amortization of/(Reserve for) Revenues Subject to Refund | CL&P
Loss Contingencies [Line Items]
Revenue		93,400
Sales | Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Loss related to litigation settlement	$ 65,000
Sales | Unfavorable Regulatory Action | CL&P
Loss Contingencies [Line Items]
Loss related to litigation settlement		$ 65,000

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EARNINGS PER SHARE - Narrative (Details) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Antidilutive share awards excluded from the EPS computation (in shares)	0	0	39,560

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EARNINGS PER SHARE - Components of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Net Income Attributable to Common Shareholders	$ 1,404,875	$ 1,220,527	$ 1,205,167
Weighted Average Common Shares Outstanding:
Basic (in shares)	346,783,444	343,972,926	338,836,147
Dilutive Effect of:
Share-Based Compensation Awards and Other (in shares)	463,324	658,130	738,994
Equity Forward Sale Agreement (in shares)	0	0	271,921
Dilutive Effect (in shares)	463,324	658,130	1,010,915
Diluted (in shares)	347,246,768	344,631,056	339,847,062
Basic EPS (in dollars per share)	$ 4.05	$ 3.55	$ 3.56
Diluted EPS (in dollars per share)	$ 4.05	$ 3.54	$ 3.55

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SEGMENT INFORMATION - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) reportableSegment
Segment Reporting Information [Line Items]
Number of reportable segments	1
Yankee Gas, NSTAR Gas and EGMA
Segment Reporting Information [Line Items]
Amount of natural gas transmission purchased | $	$ 77.7
CL&P
Segment Reporting Information [Line Items]
Number of reportable segments	1
NSTAR Electric
Segment Reporting Information [Line Items]
Number of reportable segments	1
PSNH
Segment Reporting Information [Line Items]
Number of reportable segments	1

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SEGMENT INFORMATION - Schedule of Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Operating Revenues	$ 12,289,336	$ 9,863,085	$ 8,904,430
Depreciation and Amortization	(1,643,100)	(1,335,000)	(1,159,100)
Other Operating Expenses	(8,448,000)	(6,534,800)	(5,756,600)
Operating Income	2,198,154	1,993,321	1,988,734
Interest Expense	(678,274)	(582,334)	(538,452)
Interest Income	50,500	25,600	4,800
Other Income, Net	295,600	135,700	103,800
Income Tax (Expense)/Benefit	(453,574)	(344,223)	(346,186)
Net Income	1,412,394	1,228,046	1,212,686
Net Income Attributable to Noncontrolling Interests	(7,519)	(7,519)	(7,519)
Net Income Attributable to Common Shareholders	1,404,875	1,220,527	1,205,167
Total Assets (as of)	53,230,900	48,492,144
Cash Flows Used for Investments in Plant	3,441,852	3,175,080	2,942,996
Operating Segments | Electric Distribution
Segment Reporting Information [Line Items]
Operating Revenues	9,405,300	7,423,600	7,132,300
Depreciation and Amortization	(970,400)	(737,800)	(657,000)
Other Operating Expenses	(7,663,700)	(5,970,000)	(5,642,300)
Operating Income	771,200	715,800	833,000
Interest Expense	(253,100)	(236,400)	(216,000)
Interest Income	45,100	20,700	3,200
Other Income, Net	180,400	78,100	58,000
Income Tax (Expense)/Benefit	(146,200)	(103,500)	(129,600)
Net Income	597,400	474,700	548,600
Net Income Attributable to Noncontrolling Interests	(4,600)	(4,600)	(4,600)
Net Income Attributable to Common Shareholders	592,800	470,100	544,000
Total Assets (as of)	27,365,000	25,411,200
Cash Flows Used for Investments in Plant	1,172,600	1,053,300	1,079,000
Operating Segments | Natural Gas Distribution
Segment Reporting Information [Line Items]
Operating Revenues	2,215,600	1,789,600	1,208,700
Depreciation and Amortization	(157,600)	(142,300)	(87,900)
Other Operating Expenses	(1,727,000)	(1,345,400)	(913,800)
Operating Income	331,000	301,900	207,000
Interest Expense	(71,400)	(58,600)	(40,000)
Interest Income	10,200	4,500	900
Other Income, Net	33,600	17,900	3,100
Income Tax (Expense)/Benefit	(69,200)	(60,900)	(36,900)
Net Income	234,200	204,800	134,100
Net Income Attributable to Noncontrolling Interests	0	0	0
Net Income Attributable to Common Shareholders	234,200	204,800	134,100
Total Assets (as of)	8,084,900	7,215,900
Cash Flows Used for Investments in Plant	710,300	721,100	494,400
Operating Segments | Electric Transmission
Segment Reporting Information [Line Items]
Operating Revenues	1,808,700	1,634,600	1,536,100
Depreciation and Amortization	(337,400)	(300,300)	(278,100)
Other Operating Expenses	(548,400)	(496,200)	(470,000)
Operating Income	922,900	838,100	788,000
Interest Expense	(145,500)	(133,200)	(126,800)
Interest Income	500	2,200	4,700
Other Income, Net	37,900	19,800	23,300
Income Tax (Expense)/Benefit	(216,300)	(179,400)	(183,800)
Net Income	599,500	547,500	505,400
Net Income Attributable to Noncontrolling Interests	(2,900)	(2,900)	(2,900)
Net Income Attributable to Common Shareholders	596,600	544,600	502,500
Total Assets (as of)	13,369,500	12,377,800
Cash Flows Used for Investments in Plant	1,144,000	1,024,100	1,004,600
Operating Segments | Water Distribution
Segment Reporting Information [Line Items]
Operating Revenues	222,500	211,300	215,400
Depreciation and Amortization	(50,900)	(46,100)	(44,200)
Other Operating Expenses	(111,800)	(101,400)	(86,600)
Operating Income	59,800	63,800	84,600
Interest Expense	(34,700)	(32,000)	(32,900)
Interest Income	0	0	0
Other Income, Net	8,500	3,300	2,000
Income Tax (Expense)/Benefit	3,200	1,700	(12,500)
Net Income	36,800	36,800	41,200
Net Income Attributable to Noncontrolling Interests	0	0	0
Net Income Attributable to Common Shareholders	36,800	36,800	41,200
Total Assets (as of)	2,783,800	2,551,100
Cash Flows Used for Investments in Plant	154,400	137,200	118,800
Other
Segment Reporting Information [Line Items]
Operating Revenues	1,435,500	1,354,000	1,235,900
Depreciation and Amortization	(132,600)	(113,100)	(93,500)
Other Operating Expenses	(1,189,100)	(1,170,400)	(1,071,900)
Operating Income	113,800	70,500	70,500
Interest Expense	(247,800)	(168,800)	(161,000)
Interest Income	66,300	46,000	37,800
Other Income, Net	1,600,800	1,363,900	1,382,900
Income Tax (Expense)/Benefit	(25,100)	(2,100)	16,600
Net Income	1,508,000	1,309,500	1,346,800
Net Income Attributable to Noncontrolling Interests	0	0	0
Net Income Attributable to Common Shareholders	1,508,000	1,309,500	1,346,800
Total Assets (as of)	26,365,200	22,674,700
Cash Flows Used for Investments in Plant	260,600	239,400	246,200
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(2,798,300)	(2,550,000)	(2,424,000)
Depreciation and Amortization	5,800	4,600	1,600
Other Operating Expenses	2,792,000	2,548,600	2,428,000
Operating Income	(500)	3,200	5,600
Interest Expense	74,200	46,600	38,300
Interest Income	(71,600)	(47,800)	(41,800)
Other Income, Net	(1,565,600)	(1,347,300)	(1,365,500)
Income Tax (Expense)/Benefit	0	0	0
Net Income	(1,563,500)	(1,345,300)	(1,363,400)
Net Income Attributable to Noncontrolling Interests	0	0	0
Net Income Attributable to Common Shareholders	(1,563,500)	(1,345,300)	(1,363,400)
Total Assets (as of)	(24,737,500)	(21,738,600)
Cash Flows Used for Investments in Plant	$ 0	$ 0	$ 0

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ACQUISITION OF ASSETS OF COLUMBIA GAS OF MASSACHUSETTS - Narrative (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Oct. 09, 2020	Dec. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Operating revenues					$ 154.8
Pre-tax income					13.9
TSA
Business Acquisition [Line Items]
TSA and pre-TSA costs			$ 7.9	$ 21.4	15.9
Energy efficiency expense		$ 2.0
CMA
Business Acquisition [Line Items]
Consideration transferred	$ 1,100.0
Target working capital amount	$ 68.6
Operating revenues					$ 9,273.0

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ACQUISITION OF ASSETS OF COLUMBIA GAS OF MASSACHUSETTS - Schedule of Pro Forma Information (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares
Business Acquisition [Line Items]
Operating Revenues	$ 154.8
CMA
Business Acquisition [Line Items]
Operating Revenues	9,273.0
Net Income Attributable to Common Shareholders	$ 1,265.0
Basic EPS (in dollars per share) | $ / shares	$ 3.73
Diluted EPS (in dollars per share) | $ / shares	$ 3.72

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GOODWILL - Narrative (Details) - USD ($)			12 Months Ended
	Oct. 03, 2022	Oct. 01, 2022	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Line Items]
Impairment loss		$ 0
CMA
Goodwill [Line Items]
Goodwill acquired			$ 51,900,000
CMA Measurement Period Adjustments				$ 9,600,000
The Torrington Water Company (TWC)
Goodwill [Line Items]
Goodwill acquired			44,800,000
New England Service Company (NESC)
Goodwill [Line Items]
Goodwill acquired				21,700,000
CMA Measurement Period Adjustments			500,000
Water Distribution | CMA
Goodwill [Line Items]
CMA Measurement Period Adjustments			9,600,000	0
Water Distribution | The Torrington Water Company (TWC)
Goodwill [Line Items]
Goodwill acquired	$ 44,800,000		44,800,000
Water Distribution | New England Service Company (NESC)
Goodwill [Line Items]
Goodwill acquired			22,200,000	$ 21,700,000
CMA Measurement Period Adjustments			$ 500,000

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GOODWILL - Summary of Goodwill by Reportable Segment (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 03, 2022	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Beginning Balance		$ 4,477,269	$ 4,446,000
Ending Balance		4,522,632	4,477,269
The Torrington Water Company (TWC)
Goodwill [Roll Forward]
Goodwill acquired		44,800
New England Service Company (NESC)
Goodwill [Roll Forward]
Measurement Period Adjustments		500
Goodwill acquired			21,700
CMA
Goodwill [Roll Forward]
Measurement Period Adjustments			9,600
Goodwill acquired		51,900
Electric Distribution
Goodwill [Roll Forward]
Beginning Balance		2,543,600	2,543,600
Ending Balance		2,543,600	2,543,600
Electric Distribution | The Torrington Water Company (TWC)
Goodwill [Roll Forward]
Goodwill acquired		0
Electric Distribution | New England Service Company (NESC)
Goodwill [Roll Forward]
Measurement Period Adjustments		0
Goodwill acquired			0
Electric Distribution | CMA
Goodwill [Roll Forward]
Measurement Period Adjustments			0
Electric Transmission
Goodwill [Roll Forward]
Beginning Balance		576,800	576,800
Ending Balance		576,800	576,800
Electric Transmission | The Torrington Water Company (TWC)
Goodwill [Roll Forward]
Goodwill acquired		0
Electric Transmission | New England Service Company (NESC)
Goodwill [Roll Forward]
Measurement Period Adjustments		0
Goodwill acquired			0
Electric Transmission | CMA
Goodwill [Roll Forward]
Measurement Period Adjustments			0
Natural Gas Distribution
Goodwill [Roll Forward]
Beginning Balance		451,000	441,400
Ending Balance		451,000	451,000
Natural Gas Distribution | The Torrington Water Company (TWC)
Goodwill [Roll Forward]
Goodwill acquired		0
Natural Gas Distribution | New England Service Company (NESC)
Goodwill [Roll Forward]
Measurement Period Adjustments		0
Goodwill acquired			0
Natural Gas Distribution | CMA
Goodwill [Roll Forward]
Measurement Period Adjustments			9,600
Water Distribution
Goodwill [Roll Forward]
Beginning Balance		905,900	884,200
Ending Balance		951,200	905,900
Water Distribution | The Torrington Water Company (TWC)
Goodwill [Roll Forward]
Goodwill acquired	$ 44,800	44,800
Water Distribution | New England Service Company (NESC)
Goodwill [Roll Forward]
Measurement Period Adjustments		500
Goodwill acquired		22,200	21,700
Water Distribution | CMA
Goodwill [Roll Forward]
Measurement Period Adjustments		$ 9,600	$ 0

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SCHEDULE I - FINANCIAL INFORMATION OF REGISTRANT - BALANCE SHEET (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current Assets:
Cash	$ 47,597	$ 66,773
Prepayments and Other Current Assets	382,603	369,759
Total Current Assets	4,223,198	3,270,120
Deferred Debits and Other Assets:
Investments in Subsidiary Companies, at Equity	2,176,080	1,436,293
Goodwill	4,522,632	4,477,269	$ 4,446,000
Other Long-Term Assets	541,344	611,769
Total Deferred Debits and Other Assets	12,894,882	11,844,374
Total Assets (as of)	53,230,900	48,492,144
Current Liabilities:
Notes Payable	1,442,200	1,505,450
Long-Term Debt – Current Portion	1,320,129	1,193,097
Other Current Liabilities	989,053	830,620
Total Current Liabilities	6,799,283	5,847,039
Liabilities, Noncurrent [Abstract]
Other Long-Term Liabilities	888,081	971,080
Total Deferred Credits and Other Liabilities	10,668,403	10,412,412
Capitalization:
Long-Term Debt	19,723,994	17,023,577
Common Shareholders' Equity:
Capital Surplus, Paid in	8,401,731	8,098,514
Retained Earnings	5,527,153	5,005,391
Accumulated Other Comprehensive Loss	(39,421)	(42,275)
Treasury Stock	(216,225)	(250,878)
Stockholders' equity	15,473,158	14,599,844	$ 14,063,566	$ 12,629,994
Total Liabilities and Capitalization	53,230,900	48,492,144
Eversource
Current Assets:
Cash	971	175
Accounts Receivable from Subsidiaries	53,338	43,403
Notes Receivable from Subsidiaries	1,074,800	1,245,900
Prepayments and Other Current Assets	23,597	11,974
Total Current Assets	1,152,706	1,301,452
Deferred Debits and Other Assets:
Investments in Subsidiary Companies, at Equity	18,379,840	16,108,190
Notes Receivable from Subsidiaries	1,896,500	1,001,000
Accumulated Deferred Income Taxes	0	17,409
Goodwill	3,852,524	3,852,524
Other Long-Term Assets	108,867	101,710
Total Deferred Debits and Other Assets	24,237,731	21,080,833
Total Assets (as of)	25,390,437	22,382,285
Current Liabilities:
Notes Payable	1,442,200	1,342,950
Long-Term Debt – Current Portion	1,207,047	767,681
Accounts Payable to Subsidiaries	33,530	37,609
Other Current Liabilities	112,807	87,745
Total Current Liabilities	2,795,584	2,235,985
Liabilities, Noncurrent [Abstract]
Accumulated Deferred Income Taxes	8,498	0
Other Long-Term Liabilities	140,393	150,616
Total Deferred Credits and Other Liabilities	148,891	150,616
Capitalization:
Long-Term Debt	6,972,804	5,395,840
Common Shareholders' Equity:
Common Shares	1,799,920	1,789,092
Capital Surplus, Paid in	8,401,731	8,098,514
Retained Earnings	5,527,153	5,005,391
Accumulated Other Comprehensive Loss	(39,421)	(42,275)
Treasury Stock	(216,225)	(250,878)
Stockholders' equity	15,473,158	14,599,844
Total Liabilities and Capitalization	$ 25,390,437	$ 22,382,285

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SCHEDULE I - FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF INCOME (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Income Statements, Captions [Line Items]
Operating Revenues	$ 12,289,336	$ 9,863,085	$ 8,904,430
Operating Expenses:
Other	1,865,328	1,739,685	1,480,252
Operating Income (Loss)	2,198,154	1,993,321	1,988,734
Interest Expense	678,274	582,334	538,452
Other Income, Net:
Equity in Earnings of Subsidiaries	22,900	14,200	14,200
Other Income, Net	346,088	161,282	108,590
Income Before Income Tax Expense	1,865,968	1,572,269	1,558,872
Income Tax Benefit	453,574	344,223	346,186
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Basic Earnings Per Common Share (in dollars per share)	$ 4.05	$ 3.55	$ 3.56
Diluted Earnings Per Common Share (in dollars per share)	$ 4.05	$ 3.54	$ 3.55
Weighted Average Common Shares Outstanding:
Basic (in shares)	346,783,444	343,972,926	338,836,147
Diluted (in shares)	347,246,768	344,631,056	339,847,062
Eversource
Condensed Income Statements, Captions [Line Items]
Operating Revenues	$ 0	$ 0	$ 0
Operating Expenses:
Other	26,708	43,048	28,645
Operating Income (Loss)	(26,708)	(43,048)	(28,645)
Interest Expense	237,773	163,613	160,887
Other Income, Net:
Equity in Earnings of Subsidiaries	1,565,474	1,345,199	1,309,630
Other, Net	79,383	47,802	38,546
Other Income, Net	1,644,857	1,393,001	1,348,176
Income Before Income Tax Expense	1,380,376	1,186,340	1,158,644
Income Tax Benefit	(24,499)	(34,187)	(46,523)
Net Income	$ 1,404,875	$ 1,220,527	$ 1,205,167
Basic Earnings Per Common Share (in dollars per share)	$ 4.05	$ 3.55	$ 3.56
Diluted Earnings Per Common Share (in dollars per share)	$ 4.05	$ 3.54	$ 3.55
Weighted Average Common Shares Outstanding:
Basic (in shares)	346,783,444	343,972,926	338,836,147
Diluted (in shares)	347,246,768	344,631,056	339,847,062

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SCHEDULE I - FINANCIAL INFORMATION OF REGISTRANT - STATEMENTS OF COMPREHENSIVE INCOME (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Statement of Income Captions [Line Items]
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	20	972	1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)	(671)	342
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	4,470	33,835	(13,290)
Other Comprehensive Income/(Loss), Net of Tax	2,854	34,136	(11,352)
Comprehensive Income	1,407,729	1,254,663	1,193,815
Eversource
Condensed Statement of Income Captions [Line Items]
Net Income	1,404,875	1,220,527	1,205,167
Other Comprehensive Income/(Loss), Net of Tax:
Qualified Cash Flow Hedging Instruments	20	972	1,596
Changes in Unrealized (Losses)/Gains on Marketable Securities	(1,636)	(671)	342
Changes in Funded Status of Pension, SERP and PBOP Benefit Plans	4,470	33,835	(13,290)
Other Comprehensive Income/(Loss), Net of Tax	2,854	34,136	(11,352)
Comprehensive Income	$ 1,407,729	$ 1,254,663	$ 1,193,815

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SCHEDULE I - FINANCIAL INFORMATION OF REGISTRANT - STATEMENT OF CASH FLOW (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities:
Net Income	$ 1,412,394	$ 1,228,046	$ 1,212,686
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Equity in Earnings of Subsidiaries	(22,900)	(14,200)	(14,200)
Deferred Income Taxes	346,779	347,056	257,154
Other	(39,192)	(64,640)	(25,957)
Receivables and Unbilled Revenues, Net	(470,593)	(135,505)	(351,843)
Taxes Receivable/Accrued, Net	18,358	(110,621)	43,819
Other Current Assets and Liabilities, Net	(45,583)	3,710	(24,995)
Net Cash Flows Provided by Operating Activities	2,401,293	1,962,600	1,682,572
Investing Activities:
Other Investing Activities	20,420	22,178	23,809
Net Cash Flows Used in Investing Activities	(4,130,490)	(3,447,374)	(4,129,275)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	197,058	0	928,992
Cash Dividends on Common Shares	(860,033)	(805,439)	(744,665)
Issuance of Long-Term Debt	4,045,000	3,230,000	2,760,000
Retirement of Long-Term Debt	(1,175,000)	(1,142,500)	(327,236)
Other Financing Activities	(48,185)	(46,625)	14,273
Net Cash Flows Provided by Financing Activities	2,029,941	1,440,832	2,594,590
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	300,744	(43,942)	147,887
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	221,008	264,950	117,063
Cash, Cash Equivalents and Restricted Cash - End of Year	521,752	221,008	264,950
Cash Paid/(Received) During the Year for:
Interest	636,200	568,700	518,000
Income Taxes	77,900	121,600	48,900
Eversource
Operating Activities:
Net Income	1,404,875	1,220,527	1,205,167
Adjustments to Reconcile Net Income to Net Cash Flows Provided by Operating Activities:
Equity in Earnings of Subsidiaries	(1,565,474)	(1,345,199)	(1,309,630)
Cash Dividends Received from Subsidiaries	855,600	1,037,100	485,800
Deferred Income Taxes	25,823	20,293	(4,667)
Other	26,455	36,910	39,940
Receivables and Unbilled Revenues, Net	(9,935)	(3,758)	(14,575)
Taxes Receivable/Accrued, Net	(21,627)	(19,455)	35,300
Accounts Payable to Subsidiaries	(4,079)	19,185	14,091
Other Current Assets and Liabilities, Net	35,090	8,144	21,284
Net Cash Flows Provided by Operating Activities	746,728	973,747	472,710
Investing Activities:
Capital Contributions to Subsidiaries	(1,499,300)	(1,033,000)	(1,899,340)
Return of Capital from Subsidiaries	12,000	178,800	80,000
Increase in Notes Receivable from Subsidiaries	(724,400)	(140,200)	(264,300)
Other Investing Activities	(1,289)	(3,196)	(367)
Net Cash Flows Used in Investing Activities	(2,212,989)	(997,596)	(2,084,007)
Financing Activities:
Issuance of Common Shares, Net of Issuance Costs	197,058	0	928,992
Cash Dividends on Common Shares	(860,033)	(805,439)	(744,665)
Issuance of Long-Term Debt	2,800,000	1,000,000	1,550,000
Retirement of Long-Term Debt	(750,000)	(450,000)	0
Increase (Decrease) in Notes Payable to Eversource Parent	99,250	288,625	(170,545)
Other Financing Activities	(19,193)	(9,545)	46,480
Net Cash Flows Provided by Financing Activities	1,467,082	23,641	1,610,262
Net Increase/(Decrease) in Cash, Cash Equivalents and Restricted Cash	821	(208)	(1,035)
Cash, Cash Equivalents and Restricted Cash - Beginning of Year	226	434	1,469
Cash, Cash Equivalents and Restricted Cash - End of Year	1,047	226	434
Cash Paid/(Received) During the Year for:
Interest	215,053	164,568	140,694
Income Taxes	$ (20,992)	$ (51,277)	$ (43,158)

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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase due to CMA acquisition			$ 24,200
Allowance for uncollectible accounts for late fees and other receivable amounts	$ 486,297	$ 417,406	358,900	$ 224,800
Restatement Adjustment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance for uncollectible accounts for late fees and other receivable amounts			23,800	23,800
CL&P
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase due to CMA acquisition			0
Allowance for uncollectible accounts for late fees and other receivable amounts	225,320	181,319	157,400	97,300
CL&P | Restatement Adjustment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance for uncollectible accounts for late fees and other receivable amounts			22,200	22,200
NSTAR Electric
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase due to CMA acquisition			0
Allowance for uncollectible accounts for late fees and other receivable amounts	94,958	97,005	91,600	75,400
NSTAR Electric | Restatement Adjustment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance for uncollectible accounts for late fees and other receivable amounts			(1,300)	(1,300)
PSNH
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Increase due to CMA acquisition			0
Allowance for uncollectible accounts for late fees and other receivable amounts	29,236	24,331	17,200	10,500
PSNH | Restatement Adjustment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance for uncollectible accounts for late fees and other receivable amounts			300	$ 300
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	417,406	358,851	224,821
Additions, Charged to Costs and Expense	61,876	60,886	53,461
Additions, Charged to Other Accounts	112,533	110,572	145,005
Deductions	105,518	112,903	64,436
Balance at end of period	486,297	417,406	358,851
Allowance for Doubtful Accounts | CL&P
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	181,319	157,447	97,348
Additions, Charged to Costs and Expense	15,578	13,495	12,882
Additions, Charged to Other Accounts	59,485	57,779	71,223
Deductions	31,062	47,402	24,006
Balance at end of period	225,320	181,319	157,447
Allowance for Doubtful Accounts | NSTAR Electric
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	97,005	91,583	75,406
Additions, Charged to Costs and Expense	21,550	16,649	15,293
Additions, Charged to Other Accounts	12,412	20,064	23,424
Deductions	36,009	31,291	22,540
Balance at end of period	94,958	97,005	91,583
Allowance for Doubtful Accounts | PSNH
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	24,331	17,157	10,497
Additions, Charged to Costs and Expense	9,211	13,113	5,164
Additions, Charged to Other Accounts	2,539	3,135	7,692
Deductions	6,845	9,074	6,196
Balance at end of period	$ 29,236	$ 24,331	$ 17,157

XML

Label	Element	Value
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]
Public Service Company Of New Hampshire (PSNH) [Member]
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]
NSTAR Electric Company [Member]
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]
The Connecticut Light And Power Company [Member]
Accounting Standards Update [Extensible Enumeration]	us-gaap_AccountingStandardsUpdateExtensibleList	Accounting Standards Update 2016-13 [Member]