Credit Risk	3 Months Ended
Mar. 31, 2017
Risks and Uncertainties [Abstract]
Credit Risk	Credit Risk The Companies' accounting policies for credit risk are discussed in Note 23 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2016. At March 31, 2017, Dominion's credit exposure related to energy marketing and price risk management activities totaled $89 million. Of this amount, investment grade counterparties, including those internally rated, represented 65%. No single counterparty, whether investment grade or non-investment grade, exceeded $26 million of exposure. At March 31, 2017, Virginia Power's exposure related to sales to wholesale customers totaled $28 million. Of this amount, investment grade counterparties, including those internally rated, represented 43%. No single counterparty, whether investment grade or non-investment grade, exceeded $5 million of exposure. Credit-Related Contingent Provisions The majority of Dominion's derivative instruments contain credit-related contingent provisions. These provisions require Dominion to provide collateral upon the occurrence of specific events, primarily a credit rating downgrade. If the credit-related contingent features underlying these instruments that are in a liability position and not fully collateralized with cash were fully triggered as of March 31, 2017, Dominion would not have been required to post any collateral to its counterparties and at December 31, 2016, Dominion would have been required to post an additional $3 million of collateral to its counterparties. The collateral that would be required to be posted includes the impacts of any offsetting asset positions and any amounts already posted for derivatives, non-derivative contracts and derivatives elected under the normal purchases and normal sales exception, per contractual terms. Dominion had not posted any collateral at March 31, 2017 or December 31, 2016 related to derivatives with credit-related contingent provisions that are in a liability position and not fully collateralized with cash. The collateral posted includes any amounts paid related to non-derivative contracts and derivatives elected under the normal purchases and normal sales exception, per contractual terms. The aggregate fair value of all derivative instruments with credit-related contingent provisions that are in a liability position and not fully collateralized with cash as of March 31, 2017 and December 31, 2016 was $4 million and $9 million, respectively, which does not include the impact of any offsetting asset positions. Credit-related contingent provisions for Virginia Power and Dominion Gas were not material as of March 31, 2017 and December 31, 2016. See Note 9 for further information about derivative instruments.

Credit Risk

The Companies' accounting policies for credit risk are discussed in Note 23 to the Consolidated Financial Statements in the Companies' Annual Report on Form 10-K for the year ended December 31, 2016.

At March 31, 2017, Dominion's credit exposure related to energy marketing and price risk management activities totaled $89 million. Of this amount, investment grade counterparties, including those internally rated, represented 65%. No single counterparty, whether investment grade or non-investment grade, exceeded $26 million of exposure. At March 31, 2017, Virginia Power's exposure related to sales to wholesale customers totaled $28 million. Of this amount, investment grade counterparties, including those internally rated, represented 43%. No single counterparty, whether investment grade or non-investment grade, exceeded $5 million of exposure.

Credit-Related Contingent Provisions

The majority of Dominion's derivative instruments contain credit-related contingent provisions. These provisions require Dominion to provide collateral upon the occurrence of specific events, primarily a credit rating downgrade. If the credit-related contingent features underlying these instruments that are in a liability position and not fully collateralized with cash were fully triggered as of March 31, 2017, Dominion would not have been required to post any collateral to its counterparties and at December 31, 2016, Dominion would have been required to post an additional $3 million of collateral to its counterparties. The collateral that would be required to be posted includes the impacts of any offsetting asset positions and any amounts already posted for derivatives, non-derivative contracts and derivatives elected under the normal purchases and normal sales exception, per contractual terms. Dominion had not posted any collateral at March 31, 2017 or December 31, 2016 related to derivatives with credit-related contingent provisions that are in a liability position and not fully collateralized with cash. The collateral posted includes any amounts paid related to non-derivative contracts and derivatives elected under the normal purchases and normal sales exception, per contractual terms. The aggregate fair value of all derivative instruments with credit-related contingent provisions that are in a liability position and not fully collateralized with cash as of March 31, 2017 and December 31, 2016 was $4 million and $9 million, respectively, which does not include the impact of any offsetting asset positions. Credit-related contingent provisions for Virginia Power and Dominion Gas were not material as of March 31, 2017 and December 31, 2016. See Note 9 for further information about derivative instruments.