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GOODWILL (Tables)
12 Months Ended
Dec. 31, 2024
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, 2023$2,543.6 $576.8 $451.0 $951.2 $4,522.6 
Water Acquisitions— — — 9.5 9.5 
Balance as of December 31, 2023$2,543.6 $576.8 $451.0 $960.7 $4,532.1 
Water Sale and 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