Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2020

Asset Retirement Obligation Disclosure [Abstract]

Changes to Asset Retirement Obligations

The changes to AROs during 2019 and 2020 were as follows:

	Amount
(millions)
Dominion Energy
AROs at December 31, 2018	$	2,444
Obligations incurred during the period(1)		2,413
AROs acquired in the SCANA Combination		577
Obligations settled during the period		(134	)
Revisions in estimated cash flows(2)		(324	)
Accretion		208
AROs at December 31, 2019(3)	$	5,184
Obligations incurred during the period		67
Obligations settled during the period		(114	)
Revisions in estimated cash flows(4)		228
Accretion		218
AROs at December 31, 2020(3)	$	5,583
Virginia Power
AROs at December 31, 2018	$	1,445
Obligations incurred during the period(1)		2,408
Obligations settled during the period		(81	)
Revisions in estimated cash flows(2)		(323	)
Accretion		132
AROs at December 31, 2019	$	3,581
Obligations incurred during the period		48
Obligations settled during the period		(85	)
Revisions in estimated cash flows(5)		139
Accretion		137
AROs at December 31, 2020	$	3,820

(1) Reflects future ash pond and landfill closure costs at certain utility generation facilities. See discussion below.

(2) Reflects revisions to future ash pond and landfill closure costs at certain utility generation facilities as well as revisions for 20-year license extensions for regulated nuclear power stations in Virginia.

(3) Includes $394 million and $179 million reported in other current liabilities at December 31, 2019 and 2020, respectively.

(4) Reflects revisions to future ash pond and landfill closure costs at certain utility generation facilities, asbestos abatement costs associated with certain utility facilities and from the completion of a nuclear decommissioning cost study related to Summer.

(5) Reflects revisions to future ash pond and landfill closure costs at certain utility generation facilities and asbestos abatement costs associated with certain utility facilities.