GOODWILL (Tables)

12 Months Ended

Dec. 31, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill by Reportable Segment

The following table presents Eversource’s goodwill by reportable segment:

(Millions of Dollars)	Electric Distribution		Electric Transmission		Natural Gas Distribution		Water Distribution		Total
Balance as of January 1, 2024	$	2,543.6	$	576.8	$	451.0	$	960.7	$	4,532.1
Sale of Water Unregulated Business and Water Acquisition, net	—		—		—		(1.2)		(1.2)
Water Goodwill Impairment	—		—		—		(297.0)		(297.0)
Water Goodwill Reclassified as Held for Sale	—		—		—		(662.5)		(662.5)
Balance as of December 31, 2024	$	2,543.6	$	576.8	$	451.0	$	—	$	3,571.4
Measurement Period Adjustment	—		—		—		(0.1)		(0.1)
Water Goodwill Reclassified from Held for Sale	—		—		—		662.5		662.5
Balance as of December 31, 2025	$	2,543.6	$	576.8	$	451.0	$	662.4	$	4,233.8