Equity Method Investment, Realized Gain (Loss) on Disposal, Net of Tax

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- Definition

Gain (loss) on disposition of property plant and equipment, net of tax.

+ References

No definition available.

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- Definition

Gas and oil area, developed, net, remaining interest conveyed, percentage.

+ References

No definition available.

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- Definition

Area assigned to productive oil and gas wells representing summation of fractional ownership working interest to whole.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1208
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- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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-Name Accounting Standards Codification
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The excess amount received or due over net assets in a transaction accounted for as a divestiture where a subsidiary, business or operating assets are "sold" by the entity to a newly formed, thinly capitalized, highly leveraged buyer. This gain is not yet recognized and is disclosed on the balance sheet as an offset against the carrying amount of the securities received.

+ References

No definition available.

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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

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- Definition

Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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-Publisher FASB
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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Property, Plant and Equipment (Narrative) (Detail) $ in Millions	1 Months Ended									3 Months Ended		12 Months Ended
	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($) a	Mar. 31, 2018 USD ($) a	Jan. 31, 2018 USD ($) a	Dec. 31, 2017 USD ($)	Aug. 31, 2017 a	Jul. 31, 2017 USD ($) a	Apr. 30, 2016 a	Nov. 30, 2014 USD ($) a	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) a	Dec. 01, 2019 USD ($)	Oct. 31, 2018 USD ($)	Oct. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Jul. 31, 2014 a	Dec. 31, 2013 a
Marcellus Shale \| Amended Agreement to Extend Conveyance of Development Rights
Property, Plant and Equipment [Line Items]
Gas and oil area developed net remaining interest conveyed percentage														78.00%
Total consideration	$ 65													$ 130
Marcellus Shale \| Final Conveyance \| Amended Agreement to Extend Conveyance of Development Rights
Property, Plant and Equipment [Line Items]
Gain on sale													$ 65
Dominion Energy Gas Holdings, LLC \| Marcellus Shale \| Oil and Gas Properties
Property, Plant and Equipment [Line Items]
Amount of consideration		$ 6		$ 28					$ 120							$ 200
Gain on sale															$ 70
Development rights (number of acres) \| a		9,000	11,000	18,000		70,000	2,000	9,000	24,000						4,000					12,000	100,000
Proceeds from assignment of Shale Development Rights							$ 5		$ 70			$ 116
Gas and oil area developed net remaining interest conveyed percentage				50.00%		68.00%	50.00%								50.00%
Dominion Energy Gas Holdings, LLC \| Marcellus Shale \| Amended Agreement to Extend Conveyance of Development Rights \| Oil and Gas Properties
Property, Plant and Equipment [Line Items]
Gain on sale														56
After tax gain on sale										$ 5	$ 33
Development rights (number of acres) \| a								70,000
Gas and oil area developed net remaining interest conveyed percentage								32.00%
Dominion Energy Gas Holdings, LLC \| Marcellus Shale \| Elimination of Overriding Royalty Interest \| Oil and Gas Properties
Property, Plant and Equipment [Line Items]
Gain on sale														9
Dominion Energy Gas Holdings, LLC \| Marcellus Shale \| Final Conveyance \| Amended Agreement to Extend Conveyance of Development Rights \| Oil and Gas Properties
Property, Plant and Equipment [Line Items]
After tax gain on sale													47
Dominion Energy Gas Holdings, LLC \| Utica and Point Pleasant Shale \| Oil and Gas Properties
Property, Plant and Equipment [Line Items]
Amount of consideration			$ 16
Proceeds from assignment of Shale Development Rights			16
Dominion Energy Gas Holdings, LLC \| Other operations and maintenance \| Marcellus Shale \| Oil and Gas Properties
Property, Plant and Equipment [Line Items]
Gain on sale		$ 6		$ 28			$ 5
After tax gain on sale		$ 4		$ 20			$ 3
Dominion Energy Gas Holdings, LLC \| Other operations and maintenance \| Utica and Point Pleasant Shale \| Oil and Gas Properties
Property, Plant and Equipment [Line Items]
Gain on sale			16
After tax gain on sale			$ 12
Retail Energy Marketing Assets \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Amount of consideration																		$ 143
Gain on sale					$ 78							65
After tax gain on sale					48							49
Retail Energy Marketing Assets \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| First Phase of Agreements to Sell Certain Assets
Property, Plant and Equipment [Line Items]
Amount of consideration					$ 79					$ 79				79
Retail Energy Marketing Assets \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Second Phase of Agreements to Sell Certain Assets
Property, Plant and Equipment [Line Items]
Amount of consideration																	$ 63
Fairless and Manchester
Property, Plant and Equipment [Line Items]
Amount of consideration													1,200
Gain on sale of equity method investment													210
Gain on sale of equity method investments, net of tax													198
Assignment of Tower Rental Portfolio \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Virginia Electric and Power Company
Property, Plant and Equipment [Line Items]
Amount of consideration																			$ 91
Amount to be recognized in other income ratably through 2023												22
Assignment of Tower Rental Portfolio \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Virginia Electric and Power Company \| Operating Revenue
Property, Plant and Equipment [Line Items]
Amount recognized in operating revenue and other income from sale												$ 7	$ 6
Assignment of Tower Rental Portfolio \| Disposal Group, Disposed of by Sale, Not Discontinued Operations \| Virginia Electric and Power Company \| Other Income
Property, Plant and Equipment [Line Items]
Amount recognized in operating revenue and other income from sale														$ 11