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Commitments and Contingencies (Subsidiary Guarantees) (Details) (USD $)
Sep. 30, 2014
Subsidiary
Commitments and Contingencies [Line Items]  
Stated Limit $ 4,533,000,000
Value 1,403,000,000 [1]
Number of DEI subsidiaries 2
Subsidiary Debt
 
Commitments and Contingencies [Line Items]  
Stated Limit 27,000,000 [2]
Value 27,000,000 [1],[2]
Commodity Transactions
 
Commitments and Contingencies [Line Items]  
Stated Limit 3,065,000,000 [3]
Value 635,000,000 [1],[3]
Nuclear Obligations
 
Commitments and Contingencies [Line Items]  
Stated Limit 243,000,000 [4]
Value 94,000,000 [1],[4]
Nuclear Obligations | Millstone
 
Commitments and Contingencies [Line Items]  
Stated Limit 150,000,000
Nuclear Obligations | Kewaunee
 
Commitments and Contingencies [Line Items]  
Stated Limit 60,000,000
Cove Point
 
Commitments and Contingencies [Line Items]  
Stated Limit 335,000,000 [5]
Value 0 [1],[5]
Solar
 
Commitments and Contingencies [Line Items]  
Stated Limit 343,000,000 [6]
Value 562,000,000 [1],[6]
Other
 
Commitments and Contingencies [Line Items]  
Stated Limit 520,000,000 [7]
Value $ 85,000,000 [1],[7]
[1] Represents the estimated portion of the guarantee's stated limit that is utilized as of September 30, 2014 based upon prevailing economic conditions and fact patterns specific to each guarantee arrangement. For those guarantees related to obligations that are recorded as liabilities by Dominion's subsidiaries, the value includes the recorded amount.
[2] Guarantee of debt of a DEI subsidiary. In the event of default by the subsidiary, Dominion would be obligated to repay such amounts.
[3] Guarantees related to commodity commitments of certain subsidiaries, including subsidiaries of Virginia Power, Dominion Gas and DEI. These guarantees were provided to counterparties in order to facilitate physical and financial transactions in gas, oil, electricity, pipeline capacity, transportation and related commodities and services. If any of these subsidiaries fail to perform or pay under the contracts and the counterparties seek performance or payment, Dominion would be obligated to satisfy such obligation. Dominion and its subsidiaries receive similar guarantees as collateral for credit extended to others. The value provided includes certain guarantees that do not have stated limits.
[4] Guarantees related to certain DEI subsidiaries' potential retrospective premiums that could be assessed if there is a nuclear incident under Dominion's nuclear insurance programs and guarantees for a DEI subsidiary's and Virginia Power's commitment to buy nuclear fuel. Excludes Dominion's agreement to provide up to $150 million and $60 million to two DEI subsidiaries to pay certain expenses of Millstone (in the event of a prolonged outage) and Kewaunee, respectively, as part of satisfying certain NRC requirements concerned with ensuring adequate funding for the operations of nuclear power stations. The agreement for Kewaunee also provides for funds through the completion of decommissioning.
[5] Guarantees related to Cove Point, including agreements to support terminal service and transportation agreements as well as an EPC contract for new liquefaction facilities. Includes certain guarantees that do not have stated limits.
[6] Includes guarantees to facilitate the development of solar projects including guarantees to support the issuance of limited notice to proceed and full notice to proceed under EPC agreements as well as to support payment obligations under module supply agreements. Includes certain guarantees that do not have stated limits. Also includes guarantees entered into by DEI on behalf of a subsidiary to facilitate the acquisition and development of solar projects.
[7] Guarantees related to other miscellaneous contractual obligations such as leases, environmental obligations and construction projects. Also includes guarantees related to certain DEI subsidiaries' obligations for equity capital contributions and energy generation associated with Fowler Ridge and NedPower.