SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2025

Accounting Policies [Abstract]

Schedule of Allowance for Uncollectible Accounts

The activity in the allowance for uncollectible accounts by portfolio segment as of March 31st 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
Three Months Ended 2025
Balance as of December 31, 2024	$	364.6	$	191.6	$	556.2	$	240.7	$	38.4	$	279.1	$	55.2	$	59.7	$	114.9	$	14.1
Uncollectible Expense	—		22.9		22.9		—		4.7		4.7		—		7.5		7.5		1.3
Uncollectible Costs Deferred (1)	19.4		13.8		33.2		8.8		1.9		10.7		3.5		5.5		9.0		1.4
Write-Offs	(12.6)		(37.8)		(50.4)		(9.3)		(10.1)		(19.4)		(0.9)		(15.9)		(16.8)		(2.7)
Recoveries Collected	0.1		3.6		3.7		0.1		1.0		1.1		—		1.4		1.4		0.2
Balance as of March 31, 2025	$	371.5	$	194.1	$	565.6	$	240.3	$	35.9	$	276.2	$	57.8	$	58.2	$	116.0	$	14.3

	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
Three Months Ended 2024
Balance as of December 31, 2023	$	366.8	$	187.7	$	554.5	$	259.7	$	36.3	$	296.0	$	43.6	$	53.4	$	97.0	$	14.3
Uncollectible Expense	—		16.4		16.4		—		3.5		3.5		—		6.1		6.1		1.2
Uncollectible Costs Deferred (1)	27.5		11.4		38.9		22.7		2.7		25.4		(0.8)		4.4		3.6		1.3
Write-Offs	(15.1)		(28.5)		(43.6)		(10.8)		(7.7)		(18.5)		(1.0)		(9.2)		(10.2)		(3.2)
Recoveries Collected	0.2		3.7		3.9		0.2		1.2		1.4		—		1.2		1.2		0.2
Balance as of March 31, 2024	$	379.4	$	190.7	$	570.1	$	271.8	$	36.0	$	307.8	$	41.8	$	55.9	$	97.7	$	13.8

(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.

Schedule of Components of Other Income, Net

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

	For the Three Months Ended
	March 31, 2025								March 31, 2024
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Pension, SERP and PBOP Non-Service    Income Components, Net of Deferred Portion	$	32.6	$	8.3	$	14.8	$	4.1	$	27.8	$	6.5	$	12.3	$	3.6
AFUDC Equity	23.9		3.6		14.1		3.9		26.8		6.0		16.2		1.9
Equity in Earnings of Unconsolidated Affiliates	6.0		—		0.2		—		7.8		—		0.2		—
Investment (Loss)/Income	(2.0)		0.1		(1.8)		0.1		(0.8)		(0.7)		0.4		(0.2)
Interest Income	34.0		5.6		19.0		2.7		30.0		4.7		18.0		1.8
Other	(2.2)		—		—		—		(0.6)		—		—		—
Total Other Income, Net	$	92.3	$	17.6	$	46.3	$	10.8	$	91.0	$	16.5	$	47.1	$	7.1

Schedule of Other Taxes

These gross receipts taxes are recorded separately with collections in Operating Revenues and with payments in Taxes Other Than Income Taxes on the statements of income as follows:

	For the Three Months Ended
(Millions of Dollars)	March 31, 2025		March 31, 2024
Eversource	$	63.7	$	53.3
CL&P	52.9		43.9

Schedule of Non-Cash Investing Activities

Non-cash investing activities include plant additions included in Accounts Payable as follows:

(Millions of Dollars)	As of March 31, 2025		As of March 31, 2024
Eversource	$	427.2	$	453.6
CL&P	82.3		112.8
NSTAR Electric	172.8		132.7
PSNH	58.2		75.2

Reconciliation of Cash Balances to Cash and Restricted Cash

The following table reconciles cash and cash equivalents as reported on the balance sheets to the cash, cash equivalents and restricted cash balance as reported on the statements of cash flows:

	As of March 31, 2025								As of December 31, 2024
(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	$	111.4	$	67.7	$	2.9	$	4.4	$	26.7	$	1.1	$	0.9	$	1.4
Restricted cash included in:
Special Deposits	64.6		1.0		8.2		22.5		75.8		1.0		8.1		32.7
Assets Held for Sale, Current	5.8		—		—		—		5.8		—		—		—
Marketable Securities	9.5		—		—		—		10.0		—		—		—
Other Long-Term Assets	9.3		—		—		3.2		9.0		—		—		3.1
Cash, Cash Equivalents and Restricted Cash as reported on the Statements of Cash Flows	$	200.6	$	68.7	$	11.1	$	30.1	$	127.3	$	2.1	$	9.0	$	37.2