2.2.0.7 false Fair Value Measurements (Policies) 128 - Disclosure - Fair Value Measurements (Policies) true false false false 1 USD false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 pure Standard http://www.xbrl.org/2003/instance pure 0 shares Standard http://www.xbrl.org/2003/instance shares 0 $ 5 Fair Value Disclosures Policy 3 d_FairValueDisclosuresPolicyTextBlock d false na duration Provides a description of the entities fair value measurements policy. false false false false false false false false false false false false 1 false false false false 0 0 <div> <p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2">Dominion and Virginia Power regularly evaluate and validate the inputs used to estimate fair value by a number of methods, including review and verification of models, as well as various market price verification procedures such as the use of pricing services and multiple broker quotes to support the market price of the various commodities in which the Companies transact.</font></p> </div> Dominion and Virginia Power regularly evaluate and validate the inputs used to estimate fair value by a number of methods, including review and verification false false false us-types:textBlockItemType textblock Provides a description of the entities fair value measurements policy. No authoritative reference available. false 6 Credit Risk Policy 3 d_CreditRiskPolicyTextBlock d false na duration Provides a description of the entities credit risk policy. false false false false false false false false false false false false 1 false false false false 0 0 <div> <p style="MARGIN-TOP: 12px; MARGIN-BOTTOM: 0px"><font style="FONT-FAMILY: Times New Roman" size="2">For derivative contracts, Dominion and Virginia Power recognize transfers among Level 1, Level 2 and Level 3 based on fair values as of the first day of the month in which the transfer occurs. Transfers out of Level&#xA0;3 represent assets and liabilities that were previously classified as Level&#xA0;3 for which the inputs became observable based on the criteria discussed in Note 7 to the Consolidated Financial Statements in Dominion&#x2019;s and Virginia Power&#x2019;s Annual Report on Form 10-K for the year ended December&#xA0;31, 2009 for classification in either Level&#xA0;1 or Level&#xA0;2. Because the activity and liquidity of commodity markets vary substantially between regions and time periods, the availability of observable inputs for substantially the full term and value of the Companies&#x2019; over-the-counter derivative contracts is subject to change.</font></p> </div> For derivative contracts, Dominion and Virginia Power recognize transfers among Level 1, Level 2 and Level 3 based on fair values as of the first day of false false false us-types:textBlockItemType textblock Provides a description of the entities credit risk policy. No authoritative reference available. false 1 2 false UnKnown UnKnown UnKnown false true