MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities Reconciliation

The following is a summary of available-for-sale debt securities, which are held in CYAPC’s and YAEC’s spent nuclear fuel trusts:


	As of December 31,
	2024								2023
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	$	163.2	$	0.1	$	(6.1)	$	157.2	$	169.5	$	1.4	$	(6.6)	$	164.3

Investments Classified by Contractual Maturity Date

As of December 31, 2024, the contractual maturities of available-for-sale debt securities were as follows:


Eversource (Millions of Dollars)	Amortized Cost		Fair Value

Less than one year	$	11.3	$	11.7
One to five years	35.6		35.6
Six to ten years	43.5		42.6
Greater than ten years	72.8		67.3
Total Debt Securities	$	163.2	$	157.2

Realized Gains and Losses: Realized gains and losses are offset in long-term liabilities for CYAPC and YAEC and are recorded in Other Income, Net for Eversource's benefit trusts. Eversource utilizes the average cost basis method for the CYAPC and YAEC spent nuclear fuel trusts and the specific identification basis method for the Eversource non-qualified benefit trusts to compute the realized gains and losses on the sale of marketable securities.

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,
	2024		2023
Level 1:
Mutual Funds and Equities	$	163.1	$	176.9
Money Market Funds	10.0		13.7
Total Level 1	$	173.1	$	190.6
Level 2:
U.S. Government Issued Debt Securities (Agency and Treasury)	$	92.0	$	90.1
Corporate Debt Securities	32.5		34.0
Asset-Backed Debt Securities	7.8		5.6
Municipal Bonds	6.8		9.8
Other Fixed Income Securities	8.1		11.1
Total Level 2	$	147.2	$	150.6
Total Marketable Securities	$	320.3	$	341.2