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Derivatives and Hedge Accounting Activities (Selected Information Related to Gains (Losses) on Cash Flow Hedges Included in AOCI) (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2017 USD ($)
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | $ (260)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | (4)
Commodity | Gas |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | 7
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | $ 7
Maximum Term | 33 months
Commodity | Electricity |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | $ (4)
Commodities, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | $ (4)
Maximum Term | 9 months
Interest rate |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | $ (267)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | $ (6)
Maximum Term | 393 months
Foreign currency |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | $ 4
Foreign currency, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | $ (1)
Maximum Term | 111 months
Virginia Electric and Power Company |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | $ (8)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | (1)
Virginia Electric and Power Company | Interest rate |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | (8)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | $ (1)
Maximum Term | 393 months
Dominion Gas Holdings, LLC |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | $ (22)
Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | (4)
Dominion Gas Holdings, LLC | Interest rate |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | (26)
Interest rate, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | $ (3)
Maximum Term | 333 months
Dominion Gas Holdings, LLC | Foreign currency |
Derivative Instruments, Gain (Loss) [Line Items] |
AOCI After-Tax | $ 4
Foreign currency, Amounts Expected to be Reclassified to Earnings During the Next 12 Months After-Tax | $ (1)
Maximum Term | 111 months

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- Definition Accumulated change, net of tax, in accumulated gains and losses from instruments designated and qualifying as the effective portion of cash flow hedges that will be reclassified into earnings during the next 12 months. + References No definition available. + Details
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- Definition Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80784-113994 + Details
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- Definition The estimated net amount of unrealized gains or losses on foreign currency cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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- Definition The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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- Definition Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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- Definition The estimated net amount of unrealized gains or losses on price risk cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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