GOODWILL (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Goodwill by Reportable Segment

The following table presents goodwill by reportable segment:

(Millions of Dollars)	Electric Distribution		Electric Transmission		Natural Gas Distribution		Water Distribution		Total
Balance as of January 1, 2020	$	2,544	$	577	$	399	$	907	$	4,427
Acquisition of CMA Assets	—		—		42		—		42
Sale of Hingham water system	—		—		—		(23)		(23)
Balance as of December 31, 2020	$	2,544	$	577	$	441	$	884	$	4,446