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Derivatives and Hedge Accounting Activities (Volume of our Derivative Activity) (Details) - 12 months ended Dec. 31, 2016 MMcf in Thousands, € in Millions | USD ($) MWh MMcf gal | EUR (€)
--- | --- | ---
Fixed Price - Natural Gas - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | MMcf | [1] | 91 |
Fixed Price - Natural Gas - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | MMcf | [1] | 18 |
Basis - Natural Gas - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | MMcf |  | 223 |
Basis - Natural Gas - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | MMcf |  | 593 |
Fixed Price - Electricity - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of electricity (MWh) | MWh | [1] | 11,880,630 |
Fixed Price - Electricity - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of electricity (MWh) | MWh | [1] | 1,963,426 |
Financial Transmission Rights - Electricity- Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 46,269,912 |
Financial Transmission Rights - Electricity- Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 0 |
Liquids - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | gal | [2] | 46,311,225 |
Liquids - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | gal | [2] | 12,741,120 |
Interest Rate - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | $ | [3] | $ 1,800,000,000 |
Interest Rate - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | $ | [3] | 2,903,640,679 |
Foreign currency |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | € |  |  | € 250
Foreign Exchange - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | $ | [3],[4] | 0 |
Foreign Exchange - Non- Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | $ | [3],[4] | $ 280,000,000 |
Virginia Electric and Power Company | Fixed Price - Natural Gas - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | MMcf | [5] | 27 |
Virginia Electric and Power Company | Fixed Price - Natural Gas - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | MMcf | [5] | 14 |
Virginia Electric and Power Company | Basis - Natural Gas - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | MMcf |  | 101 |
Virginia Electric and Power Company | Basis - Natural Gas - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | MMcf |  | 539 |
Virginia Electric and Power Company | Fixed Price - Electricity - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of electricity (MWh) | MWh | [5] | 1,343,310 |
Virginia Electric and Power Company | Fixed Price - Electricity - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of electricity (MWh) | MWh | [5] | 1,963,426 |
Virginia Electric and Power Company | Financial Transmission Rights - Electricity- Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 43,853,950 |
Virginia Electric and Power Company | Financial Transmission Rights - Electricity- Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of electricity (MWh) | MWh |  | 0 |
Virginia Electric and Power Company | Interest Rate - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | $ |  | $ 800,000,000 |
Virginia Electric and Power Company | Interest Rate - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | $ |  | $ 850,000,000 |
Dominion Gas Holdings, LLC | Liquids - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | gal |  | 39,549,225 |
Dominion Gas Holdings, LLC | Liquids - Non-current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Volume of derivative activity (bcf, Gal) | gal |  | 7,953,120 |
Dominion Gas Holdings, LLC | Foreign currency |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | € |  |  | € 250
Dominion Gas Holdings, LLC | Foreign Exchange - Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | $ | [6] | $ 0 |
Dominion Gas Holdings, LLC | Foreign Exchange - Non- Current Derivative Contract |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Interest rate and Foreign currency (US Dollars, Euros) | $ | [6] | $ 280,000,000 |
[1] | Includes options.
[2] | Includes NGLs and oil.
[3] | Maturity is determined based on final settlement period.
[4] | Euro equivalent volumes are €250,000,000.
[5] | Includes options.
[6] | Maturity is determined based on final settlement period. Euro equivalent volumes are €250,000,000

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