FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Jun. 30, 2023

Fair Value Disclosures [Abstract]

Carrying Amounts and Estimated Fair Values of Financial Instruments

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 June 30, 2023:
Preferred Stock Not Subject to Mandatory Redemption	$	155.6	$	136.5	$	116.2	$	99.3	$	43.0	$	37.2	$	—	$	—
Long-Term Debt	23,834.4		21,761.1		4,607.3		4,252.5		4,426.9		4,106.7		1,459.4		1,281.1
Rate Reduction Bonds	432.1		407.9		—		—		—		—		432.1		407.9
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