Credit Risk	9 Months Ended
Sep. 30, 2015
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, 2014. At September 30, 2015, Dominion's credit exposure related to energy marketing and price risk management activities totaled $195 million. Of this amount, investment grade counterparties, including those internally rated, represented 64%. No single counterparty, whether investment grade or non-investment grade, exceeded $35 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 September 30, 2015 and December 31, 2014, Dominion would have been required to post an additional $14 million and $20 million, respectively, 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 September 30, 2015 related to derivatives with credit-related contingent provisions that are in a liability position and not fully collateralized with cash. Dominion had posted approximately $1 million in collateral at December 31, 2014 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 September 30, 2015 and December 31, 2014 was $32 million and $49 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 September 30, 2015 and December 31, 2014. See Note 9 for further information about derivative instruments. Dominion Gas In the third quarter of 2015, DTI provided service to 244 customers with approximately 95% of its storage and transportation revenue being provided through firm services. The ten largest customers provided approximately 45% of total storage and transportation revenue and the thirty largest provided approximately 72% of total storage and transportation revenue. Approximately 98% of the transmission capacity under contract on DTI’s pipeline is subscribed with long-term contracts (two years or greater). The remaining 2% is contracted on a year-to-year basis. Less than 1% of firm transportation capacity is currently unsubscribed. More than 99% of DTI's storage capacity is under long-term contracts with less than 1% currently unsubscribed. East Ohio distributes natural gas to residential, commercial and industrial customers in Ohio using rates approved by the Ohio Commission. Approximately 99% of East Ohio revenues are derived from its jurisdictional gas services. East Ohio’s bad debt risk is mitigated by the regulatory framework established by the Ohio Commission.

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, 2014.

At September 30, 2015, Dominion's credit exposure related to energy marketing and price risk management activities totaled $195 million. Of this amount, investment grade counterparties, including those internally rated, represented 64%. No single counterparty, whether investment grade or non-investment grade, exceeded $35 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 September 30, 2015 and December 31, 2014, Dominion would have been required to post an additional $14 million and $20 million, respectively, 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 September 30, 2015 related to derivatives with credit-related contingent provisions that are in a liability position and not fully collateralized with cash. Dominion had posted approximately $1 million in collateral at December 31, 2014 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 September 30, 2015 and December 31, 2014 was $32 million and $49 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 September 30, 2015 and December 31, 2014. See Note 9 for further information about derivative instruments.

Dominion Gas

In the third quarter of 2015, DTI provided service to 244 customers with approximately 95% of its storage and transportation revenue being provided through firm services. The ten largest customers provided approximately 45% of total storage and transportation revenue and the thirty largest provided approximately 72% of total storage and transportation revenue. Approximately 98% of the transmission capacity under contract on DTI’s pipeline is subscribed with long-term contracts (two years or greater). The remaining 2% is contracted on a year-to-year basis. Less than 1% of firm transportation capacity is currently unsubscribed. More than 99% of DTI's storage capacity is under long-term contracts with less than 1% currently unsubscribed.

East Ohio distributes natural gas to residential, commercial and industrial customers in Ohio using rates approved by the Ohio Commission. Approximately 99% of East Ohio revenues are derived from its jurisdictional gas services. East Ohio’s bad debt risk is mitigated by the regulatory framework established by the Ohio Commission.