Variable Interest Entities	9 Months Ended
Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Variable Interest Entities	Note 14. Variable Interest Entities There have been no significant changes regarding the entities the Companies consider VIEs as described in Note 15 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2017, as updated in Current Report on Form 8-K, filed June 6, 2018. Dominion Energy Dominion Energy’s securities due within one year and long-term debt include $27 million and $326 million, respectively, of debt issued in 2016 by SBL Holdco, a VIE, net of issuance costs, that is nonrecourse to Dominion Energy and is secured by SBL Holdco’s interest in certain merchant solar facilities. Virginia Power Virginia Power had long-term power and capacity contracts with three non-utility generators. Contracts with two of these non-utility generators expired in the third quarter 2017 leaving a remaining aggregate summer generation capacity of approximately 218 MW. Virginia Power is not subject to any risk of loss from this potential VIE other than its remaining purchase commitments which totaled $163 million as of September 30, 2018. Virginia Power paid $13 million and $17 million for electric capacity and $4 million and $5 million for electric energy to non-utility generators in the three months ended September 30, 2018 and 2017, respectively. Virginia Power paid $38 million and $73 million for electric capacity and $14 million and $20 million for electric energy to non-utility generators in the nine months ended September 30, 2018 and 2017, respectively. Virginia Power and Dominion Energy Gas Virginia Power and Dominion Energy Gas purchased shared services from DES, an affiliated VIE, of $79 million and $31 million for the three months ended September 30, 2018, $83 million and $31 million for the three months ended September 30, 2017, $251 million and $94 million for the nine months ended September 30, 2018 and $251 million and $93 million for the nine months ended September 30, 2017, respectively. Virginia Power and Dominion Energy Gas’ Consolidated Balance Sheets included amounts due to DES of $23 million and $11 million, respectively, at September 30, 2018, and $36 million and $14 million, respectively, at December 31, 2017, recorded in payables to affiliates in the Consolidated Balance Sheets.

Note 14. Variable Interest Entities

There have been no significant changes regarding the entities the Companies consider VIEs as described in Note 15 to the Consolidated Financial Statements in the Companies’ Annual Report on Form 10-K for the year ended December 31, 2017, as updated in Current Report on Form 8-K, filed June 6, 2018.

Dominion Energy

Dominion Energy’s securities due within one year and long-term debt include $27 million and $326 million, respectively, of debt issued in 2016 by SBL Holdco, a VIE, net of issuance costs, that is nonrecourse to Dominion Energy and is secured by SBL Holdco’s interest in certain merchant solar facilities.

Virginia Power

Virginia Power had long-term power and capacity contracts with three non-utility generators. Contracts with two of these non-utility generators expired in the third quarter 2017 leaving a remaining aggregate summer generation capacity of approximately 218 MW. Virginia Power is not subject to any risk of loss from this potential VIE other than its remaining purchase commitments which totaled $163 million as of September 30, 2018. Virginia Power paid $13 million and $17 million for electric capacity and $4 million and $5 million for electric energy to non-utility generators in the three months ended September 30, 2018 and 2017, respectively. Virginia Power paid $38 million and $73 million for electric capacity and $14 million and $20 million for electric energy to non-utility generators in the nine months ended September 30, 2018 and 2017, respectively.

Virginia Power and Dominion Energy Gas

Virginia Power and Dominion Energy Gas purchased shared services from DES, an affiliated VIE, of $79 million and $31 million for the three months ended September 30, 2018, $83 million and $31 million for the three months ended September 30, 2017, $251 million and $94 million for the nine months ended September 30, 2018 and $251 million and $93 million for the nine months ended September 30, 2017, respectively. Virginia Power and Dominion Energy Gas’ Consolidated Balance Sheets included amounts due to DES of $23 million and $11 million, respectively, at September 30, 2018, and $36 million and $14 million, respectively, at December 31, 2017, recorded in payables to affiliates in the Consolidated Balance Sheets.