PROPERTY, PLANT AND EQUIPMENT AND ACCUMULATED DEPRECIATION (Tables)

9 Months Ended

Sep. 30, 2025

Property, Plant and Equipment [Abstract]

Summary of Property, Plant, and Equipment

The following tables summarize property, plant and equipment by asset category:

Eversource	As of September 30, 2025		As of December 31, 2024
(Millions of Dollars)
Distribution - Electric	$	22,182.3	$	21,144.1
Distribution - Natural Gas	9,452.8		8,922.2
Transmission - Electric	16,705.2		16,130.9
Solar	206.8		201.0
Utility	48,547.1		46,398.2
Other (1)	2,455.5		2,254.1
Property, Plant and Equipment, Gross	51,002.6		48,652.3
Less:  Accumulated Depreciation
Utility	(10,055.0)		(9,636.5)
Other	(1,195.9)		(1,044.1)
Total Accumulated Depreciation	(11,250.9)		(10,680.6)
Property, Plant and Equipment, Net	39,751.7		37,971.7
Construction Work in Progress	3,292.4		3,014.9
Total Property, Plant and Equipment, Net	$	43,044.1	$	40,986.6

	As of September 30, 2025						As of December 31, 2024
(Millions of Dollars)	CL&P		NSTAR Electric		PSNH		CL&P		NSTAR Electric		PSNH
Distribution - Electric	$	8,777.3	$	10,304.7	$	3,140.6	$	8,437.9	$	9,782.3	$	2,964.2
Transmission - Electric	7,097.5		6,558.6		3,050.7		6,937.7		6,375.2		2,819.6
Solar	—		206.8		—		—		201.0		—
Property, Plant and Equipment, Gross	15,874.8		17,070.1		6,191.3		15,375.6		16,358.5		5,783.8
Less:  Accumulated Depreciation	(3,046.0)		(3,948.0)		(1,069.0)		(2,928.0)		(3,782.0)		(1,032.3)
Property, Plant and Equipment, Net	12,828.8		13,122.1		5,122.3		12,447.6		12,576.5		4,751.5
Construction Work in Progress	594.3		1,788.3		278.9		554.6		1,461.3		338.4
Total Property, Plant and Equipment, Net	$	13,423.1	$	14,910.4	$	5,401.2	$	13,002.2	$	14,037.8	$	5,089.9

(1)    These assets are primarily comprised of computer software, hardware and equipment at Eversource Service and buildings at The Rocky River Realty Company.