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Related-Party Transactions (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Dec. 31, 2016
Related Party Transaction [Line Items] |  |  |  |
Derivative Asset |  | $ 274,000,000 |  | $ 279,000,000
Derivative Liabilities |  | 150,000,000 |  | 155,000,000
Capital expenditures |  | 1,435,000,000 | $ 1,497,000,000 |
Virginia Electric and Power Company |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Derivative Asset |  | 178,000,000 |  | 194,000,000
Derivative Liabilities |  | 33,000,000 |  | 31,000,000
Commodity purchases from affiliates |  | 212,000,000 | 145,000,000 |
Services provided by affiliates | [1] | 112,000,000 | 140,000,000 |
Services provided to affiliates |  | 5,000,000 | 5,000,000 |
Capital expenditures |  | 647,000,000 | 604,000,000 |
Outstanding borrowings, net of repayments, under money pool for non-regulated subsidiaries |  | 0 |  | 0
Virginia Electric and Power Company | Affiliate |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Derivative Asset |  | 27,000,000 |  | 41,000,000
Derivative Liabilities |  | 3,000,000 |  | 8,000,000
Virginia Electric and Power Company | Affiliate | Services provided by affiliates |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Capital expenditures |  | 34,000,000 | 39,000,000 |
Virginia Electric and Power Company | Principal Owner |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Short term demand note |  | 0 |  | 262,000,000
Virginia Electric and Power Company | Pension Benefits | Amounts Associated with the Dominion Pension Plan |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amounts due to Dominion |  | 423,000,000 |  | 396,000,000
Virginia Electric and Power Company | Dominion Retiree Health and Welfare plan | Amounts Associated with the Dominion Retiree Health and Welfare Plan |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amounts due to Dominion |  | 149,000,000 |  | 130,000,000
Dominion Gas Holdings, LLC |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Derivative Liabilities |  | 7,000,000 |  | 11,000,000
Commodity purchases from affiliates |  | 0 | 3,000,000 |
Services provided by affiliates | [2] | 39,000,000 | 27,000,000 |
Services provided to affiliates |  | 18,000,000 | 17,000,000 |
Capital expenditures |  | 134,000,000 | 161,000,000 |
Other receivables | [3] | 11,000,000 |  | 10,000,000
Affiliated notes receivable | [4] | 19,000,000 |  | 18,000,000
Dominion Gas Holdings, LLC | Revolving Credit Facility | IRCA |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Borrowings under IRCA |  | 174,000,000 |  | 118,000,000
Dominion Gas Holdings, LLC | Services provided by affiliates |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Commodity purchases from affiliates | [5] | 35,000,000 | 39,000,000 |
Dominion Gas Holdings, LLC | Affiliate |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Imbalances receivable from affiliates | [6] | 2,000,000 |  | 2,000,000
Imbalances payable to affiliates | [7] | 0 |  | 4,000,000
Dominion Gas Holdings, LLC | Affiliate | Services provided by affiliates |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Capital expenditures |  | 8,000,000 | $ 12,000,000 |
Dominion Gas Holdings, LLC | Pension Benefits | Amounts Associated with the Dominion Pension Plan |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amounts due from Dominion, noncurrent |  | 706,000,000 |  | 697,000,000
Dominion Gas Holdings, LLC | Dominion Retiree Health and Welfare plan | Amounts Associated with the Dominion Retiree Health and Welfare Plan |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Amounts due from Dominion, noncurrent |  | $ 3,000,000 |  | $ 2,000,000
[1] | Includes capitalized expenditures of $34 million and $39 million for the three months ended March 31, 2017 and 2016, respectively.
[2] | Amounts primarily attributable to Atlantic Coast Pipeline.
[3] | Represents amounts due from Atlantic Coast Pipeline, a related-party VIE.
[4] | Amounts are presented in other deferred charges and other assets in Dominion Gas' Consolidated Balance Sheets.
[5] | Includes capitalized expenditures of $8 million and $12 million for the three months ended March 31, 2017 and 2016, respectively.
[6] | Amounts are presented in other current assets in Dominion Gas' Consolidated Balance Sheets.
[7] | Amounts are presented in other current liabilities in Dominion Gas' Consolidated Balance Sheets.

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