Operating Segments (Tables)

6 Months Ended

Jun. 30, 2020

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, 2020
Dominion Energy South Carolina	$	624		$	77
Corporate and Other		—			(8	)
Consolidated Total	$	624		$	69
Three Months Ended June 30, 2019
Dominion Energy South Carolina	$	698		$	88
Corporate and Other		—			(166	)
Consolidated Total	$	698		$	(78	)
Six Months Ended June 30, 2020
Dominion Energy South Carolina	$	1,296		$	166
Corporate and Other		—			(9	)
Consolidated Total	$	1,296		$	157
Six Months Ended June 30, 2019
Dominion Energy South Carolina	$	1,372		$	152
Corporate and Other		(1,009	)		(1,339	)
Consolidated Total	$	363		$	(1,187	)