Operating Segments (Tables)

6 Months Ended

Jun. 30, 2022

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

(millions)	External Revenue		Comprehensive Income (Loss) Available (Attributable) to Common Shareholder
Three Months Ended June 30, 2022
Dominion Energy South Carolina	$	909	$	119
Corporate and Other		—		—
Consolidated Total	$	909	$	119
Three Months Ended June 30, 2021
Dominion Energy South Carolina	$	692	$	79
Corporate and Other		—		(210	)
Consolidated Total	$	692	$	(131	)
Six Months Ended June 30, 2022
Dominion Energy South Carolina	$	1,758	$	223
Corporate and Other		—		(1	)
Consolidated total	$	1,758	$	222
Six Months Ended June 30, 2021
Dominion Energy South Carolina	$	1,436	$	176
Corporate and Other		—		(256	)
Consolidated total	$	1,436	$	(80	)