Operating Segments (Tables)

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

The following table presents segment information pertaining to DESC’s operations:

Year Ended December 31,	Dominion Energy South Carolina		Corporate and Other			Consolidated Total
(millions)
2022
External revenue	$	3,783	$	—		$	3,783
Depreciation and amortization		507		—			507
Interest charges, net of AFUDC		220		—			220
Income tax expense (benefit)		132		(1	)		131
Comprehensive income (loss) available (attributable) to    common shareholder		485		(3	)		482
Capital expenditures		697		—			697
Total assets (billions)		15.7		—			15.7
2021
External revenue	$	3,146	$	—		$	3,146
Depreciation and amortization		486		—			486
Interest charges (benefit), net of AFUDC		215		(23	)		192
Income tax expense (benefit)		125		(116	)		9
Comprehensive income (loss) available (attributable) to    common shareholder		421		(212	)		209
Capital expenditures		758		—			758
Total assets (billions)		14.9		—			14.9
2020
External revenue	$	2,739	$	—		$	2,739
Depreciation and amortization		474		—			474
Interest charges, net of AFUDC		223		6			229
Income tax expense (benefit)		107		(36	)		71
Comprehensive income (loss) available (attributable) to    common shareholder		410		(113	)		297
Capital expenditures		742		—			742