SHORT-TERM AND LONG-TERM DEBT (Tables)

9 Months Ended

Sep. 30, 2023

Debt Disclosure [Abstract]

Borrowings Outstanding and Available under the Commercial Paper Programs

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

	Borrowings Outstanding as of				Available Borrowing Capacity as of				Weighted-Average Interest Rate as of
	September 30, 2023		December 31, 2022		September 30, 2023		December 31, 2022		September 30, 2023		December 31, 2022
(Millions of Dollars)
Eversource Parent Commercial Paper Program	$	1,320.3	$	1,442.2	$	679.7	$	557.8	5.53	%	4.63	%
NSTAR Electric Commercial Paper Program	209.5		—		440.5		650.0		5.35	%	—	%

Summary of Long-Term Debt Issuance and Repayments

The following table summarizes long-term debt issuances and repayments:

(Millions of Dollars)	Interest Rate		Issuance/(Repayment)		Issue Date or Repayment Date	Maturity Date	Use of Proceeds for Issuance/ 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
CL&P 2023 Series B First Mortgage Bonds	4.90	%	300.0		July 2023	July 2033	Repaid short-term debt, paid capital expenditures and working capital
NSTAR Electric 2023 Debentures	5.60	%	150.0		September 2023	October 2028	Repay Series G Senior Notes at maturity and short-term debt and for general corporate purposes
PSNH Series W First Mortgage Bonds	5.15	%	300.0		January 2023	January 2053	Repaid short-term debt, paid capital expenditures and working capital
PSNH Series X First Mortgage Bonds	5.35	%	300.0		September 2023	October 2033	Repaid Series S Bonds at maturity and for general corporate purposes
PSNH Series S First Mortgage Bonds	3.50	%	(325.0)		November 2023	November 2023	Paid at maturity
Eversource Parent Series Z Senior Notes	5.45	%	750.0		March 2023	March 2028	Repaid Series F Senior Notes at maturity and short-term debt
Eversource Parent Series F Senior Notes	2.80	%	(450.0)		May 2023	May 2023	Paid at maturity
Eversource Parent Series Z Senior Notes	5.45	%	550.0		May 2023	March 2028	Repay Series T Senior Notes and Series N Senior Notes at maturity and short-term debt
Eversource Parent Series AA Senior Notes	4.75	%	450.0		May 2023	May 2026	Repay Series T Senior Notes and Series N Senior Notes at maturity and short-term debt
Eversource Parent Series BB Senior Notes	5.125	%	800.0		May 2023	May 2033	Repay Series T Senior Notes and Series N Senior Notes at maturity and short-term debt
Eversource Parent Variable Rate Series T Senior Notes	SOFR plus 0.25%		(350.0)		August 2023	August 2023	Paid at maturity
Yankee Gas Series V First Mortgage Bonds	5.51	%	170.0		August 2023	August 2030	Repaid short-term debt and general corporate purposes
Aquarion Water Company of Connecticut Senior Notes	5.89	%	50.0		September 2023	October 2043	Repaid existing indebtedness, paid capital expenditures and general corporate purposes