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SHORT-TERM AND LONG-TERM DEBT (Tables) | 6 Months Ended
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Jun. 30, 2024
Debt Disclosure [Abstract] |
Borrowings Outstanding and Available under the Commercial Paper Programs | The amount of borrowings outstanding and available under the commercial paper programs were as follows:
| Borrowings Outstanding as of |  | Available Borrowing Capacity as of |  | Weighted-Average Interest Rate as of
| June 30, 2024 |  | December 31, 2023 |  | June 30, 2024 |  | December 31, 2023 |  | June 30, 2024 |  | December 31, 2023
(Millions of Dollars) |  |  |  |  |
Eversource Parent Commercial Paper Program | $ | 1,203.0 |  |  | $ | 1,771.9 |  |  | $ | 797.0 |  |  | $ | 228.1 |  |  | 5.67 | % |  | 5.60 | %
NSTAR Electric Commercial Paper Program | 236.5 |  |  | 365.8 |  |  | 413.5 |  |  | 284.2 |  |  | 5.37 | % |  | 5.40 | %
Summary of Long-Term Debt Issuance and Repayments | The following table summarizes long-term debt issuances and repayments:
(Millions of Dollars) | Interest Rate |  | Issuance/(Repayment) |  | Issue Date or Repayment Date |  | Maturity Date |  | Use of Proceeds for Issuance/ Repayment Information
CL&P 2024 Series A First Mortgage Bonds | 4.65 | % |  | $ | 350.0 |  |  | January 2024 |  | January 2029 |  | Repaid short-term debt, paid capital expenditures and working capital
NSTAR Electric 2024 Debentures | 5.40 | % |  | 600.0 |  |  | May 2024 |  | June 2034 |  | Repaid short-term debt, paid capital expenditures and working capital
PSNH Series X First Mortgage Bonds | 5.35 | % |  | 300.0 |  |  | April 2024 |  | October 2033 |  | Repaid short-term debt, paid capital expenditures and working capital
Eversource Parent Series DD Senior Notes | 5.00 | % |  | 350.0 |  |  | January 2024 |  | January 2027 |  | Repaid short-term debt
Eversource Parent Series EE Senior Notes | 5.50 | % |  | 650.0 |  |  | January 2024 |  | January 2034 |  | Repaid short-term debt
Eversource Parent Series FF Senior Notes | 5.85 | % |  | 700.0 |  |  | April 2024 |  | April 2031 |  | Repay Series X Senior Notes and Aquarion’s 2014 Senior Notes at maturity and short-term debt
Eversource Parent Series GG Senior Notes | 5.95 | % |  | 700.0 |  |  | April 2024 |  | July 2034 |  | Repay Series X Senior Notes and Aquarion’s 2014 Senior Notes at maturity and short-term debt
Eversource Parent Series X Senior Notes | 4.20 | % |  | (900.0) |  |  | June 2024 |  | June 2024 |  | Paid at maturity
NSTAR Gas Series W First Mortgage Bonds | 5.29 | % |  | 160.0 |  |  | June 2024 |  | June 2029 |  | Repaid short-term debt, paid capital expenditures and general corporate purchases
NSTAR Gas Series X First Mortgage Bonds | 5.48 | % |  | 40.0 |  |  | June 2024 |  | June 2034 |  | Repaid short-term debt, paid capital expenditures and general corporate purchases
Yankee Gas Series W First Mortgage Bonds | 5.50 | % |  | 90.0 |  |  | July 2024 |  | July 2029 |  | Repaid short-term debt, paid capital expenditures, working capital and repay Series P bonds at maturity
Yankee Gas Series X First Mortgage Bonds | 5.74 | % |  | 90.0 |  |  | July 2024 |  | July 2034 |  | Repaid short-term debt, paid capital expenditures, working capital and repay Series P bonds at maturity

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