REGULATORY ACCOUNTING (Tables)

3 Months Ended

Mar. 31, 2026

Regulated Operations [Abstract]

Schedule of Components of Regulatory Assets

The components of regulatory assets were as follows:

	As of March 31, 2026								As of December 31, 2025
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
Storm Costs, Net	$	2,100.4	$	1,028.9	$	602.7	$	468.8	$	1,959.3	$	991.3	$	499.6	$	468.4
Regulatory Tracking Mechanisms	1,540.3		172.7		749.7		115.9		1,573.8		206.5		705.6		93.2
Income Taxes, Net	1,051.0		547.0		165.9		22.4		1,044.5		546.1		161.5		23.3
Benefit Costs	984.9		172.5		297.1		61.3		992.8		173.7		300.0		61.7
Derivative Contracts	636.2		—		636.2		—		753.2		0.1		753.1		—
Securitized Stranded Costs	295.3		—		—		295.3		306.1		—		—		306.1
Cost of Removal	267.5		—		8.1		—		262.5		—		8.1		—
Goodwill-related	226.2		—		194.2		—		230.4		—		197.8		—
Asset Retirement Obligations	166.0		44.9		86.1		5.5		162.8		44.2		84.6		5.4
Environmental Remediation Costs	134.2		—		—		—		136.1		—		—		—
EGMA Acquisition and Integration Costs	82.3		—		—		—		82.3		—		—		—
Other Regulatory Assets	181.1		19.4		84.5		2.7		189.9		19.5		92.0		3.0
Total Regulatory Assets	7,665.4		1,985.4		2,824.5		971.9		7,693.7		1,981.4		2,802.3		961.1
Less:  Current Portion	1,897.2		235.0		1,018.9		101.4		1,975.1		265.2		978.8		119.9
Total Long-Term Regulatory Assets	$	5,768.2	$	1,750.4	$	1,805.6	$	870.5	$	5,718.6	$	1,716.2	$	1,823.5	$	841.2

Schedule of Components of Regulatory Liabilities

The components of regulatory liabilities were as follows:

	As of March 31, 2026								As of December 31, 2025
(Millions of Dollars)	Eversource		CL&P		NSTAR Electric		PSNH		Eversource		CL&P		NSTAR Electric		PSNH
EDIT due to Tax Cuts and Jobs Act of 2017	$	2,407.8	$	928.6	$	841.2	$	317.3	$	2,423.4	$	933.3	$	847.9	$	319.8
Regulatory Tracking Mechanisms	1,578.2		661.8		648.2		125.5		1,186.6		457.3		535.2		111.2
Cost of Removal	917.7		297.5		498.0		54.6		867.1		275.1		479.4		45.5
Deferred Portion of Non-Service Income    Components of Pension, SERP and PBOP	534.5		76.2		264.7		50.9		509.4		72.8		252.5		48.5
AFUDC - Transmission	187.3		74.7		112.6		—		179.4		72.0		107.4		—
Derivative Contract	131.2		—		131.2		—		91.0		—		91.0		—
Benefit Costs	74.9		9.1		20.2		6.9		80.4		8.8		24.5		6.8
Other Regulatory Liabilities	232.0		56.4		41.7		4.0		200.8		43.3		15.0		4.0
Total Regulatory Liabilities	6,063.6		2,104.3		2,557.8		559.2		5,538.1		1,862.6		2,352.9		535.8
Less:  Current Portion	1,740.0		635.3		835.4		134.1		1,264.6		417.5		650.8		118.4
Total Long-Term Regulatory Liabilities	$	4,323.6	$	1,469.0	$	1,722.4	$	425.1	$	4,273.5	$	1,445.1	$	1,702.1	$	417.4