Operating Segments (Tables)

9 Months Ended

Sep. 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 September 30, 2022
Dominion Energy South Carolina	$	1,083	$	169
Corporate and Other		—		(1	)
Consolidated Total	$	1,083	$	168
Three Months Ended September 30, 2021
Dominion Energy South Carolina	$	863	$	149
Corporate and Other		—		(5	)
Consolidated Total	$	863	$	144
Nine Months Ended September 30, 2022
Dominion Energy South Carolina	$	2,841	$	392
Corporate and Other		—		(2	)
Consolidated total	$	2,841	$	390
Nine Months Ended September 30, 2021
Dominion Energy South Carolina	$	2,299	$	325
Corporate and Other		—		(261	)
Consolidated total	$	2,299	$	64