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Related-Party Transactions (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Dec. 31, 2016
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Derivative Asset |  | $ 281,000,000 | [1] |  | $ 281,000,000 | [1] |  | $ 279,000,000 | [2]
Derivative Liabilities |  | 150,000,000 | [3] |  | 150,000,000 | [3] |  | 155,000,000 | [4]
Capital expenditures |  |  |  |  | 2,748,000,000 |  | $ 3,150,000,000 |  |
Virginia Electric and Power Company |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Derivative Asset | [2] | 167,000,000 |  |  | 167,000,000 |  |  | 194,000,000 |
Derivative Liabilities | [4] | 74,000,000 |  |  | 74,000,000 |  |  | 31,000,000 |
Commodity purchases from affiliates |  | 137,000,000 |  | $ 99,000,000 | 349,000,000 |  | 244,000,000 |  |
Services provided by affiliates | [5] | 112,000,000 |  | 102,000,000 | 224,000,000 |  | 242,000,000 |  |
Services provided to affiliates |  | 7,000,000 |  | $ 7,000,000 | 12,000,000 |  | 12,000,000 |  |
Capital expenditures |  |  |  |  | 1,219,000,000 |  | $ 1,226,000,000 |  |
Short term demand note |  | 12,000,000 |  |  | 12,000,000 |  |  | 262,000,000 | [6]
Outstanding borrowings, net of repayments, under money pool for non-regulated subsidiaries |  | $ 0 |  |  | $ 0 |  |  | 0 |
Issuance of common stock (in shares) |  | 0 |  | 0 | 0 |  | 0 |  |
Virginia Electric and Power Company | Pension Benefits | Amounts Associated with the Dominion Pension Plan |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Amounts due to Dominion |  | $ 451,000,000 |  |  | $ 451,000,000 |  |  | 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 |  | 165,000,000 |  |  | 165,000,000 |  |  | 130,000,000 |
Virginia Electric and Power Company | Affiliate |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Derivative Asset |  | 13,000,000 |  |  | 13,000,000 |  |  | 41,000,000 |
Derivative Liabilities |  | 10,000,000 |  |  | 10,000,000 |  |  | 8,000,000 |
Virginia Electric and Power Company | Affiliate | Services provided by affiliates |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Capital expenditures |  | 37,000,000 |  | $ 38,000,000 | 71,000,000 |  | $ 77,000,000 |  |
Virginia Electric and Power Company | Principal Owner |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Short term demand note |  | 12,000,000 |  |  | 12,000,000 |  |  | 262,000,000 |
Dominion Energy Gas Holdings, LLC |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Derivative Asset |  | 17,000,000 |  |  | 17,000,000 |  |  |  |
Derivative Liabilities |  | 5,000,000 |  |  | 5,000,000 |  |  | 11,000,000 |
Commodity purchases from affiliates |  | 2,000,000 |  | 2,000,000 | 2,000,000 |  | 5,000,000 |  |
Services provided by affiliates | [7] | 36,000,000 |  | 33,000,000 | 75,000,000 |  | 60,000,000 |  |
Services provided to affiliates |  | 18,000,000 |  | 18,000,000 | 36,000,000 |  | 35,000,000 |  |
Capital expenditures |  |  |  |  | 309,000,000 |  | 393,000,000 |  |
Short term demand note |  | 24,000,000 |  |  | 24,000,000 |  |  | 118,000,000 | [8]
Other receivables | [9] | 15,000,000 |  |  | 15,000,000 |  |  | 10,000,000 |
Affiliated notes receivable | [10] | 20,000,000 |  |  | 20,000,000 |  |  | 18,000,000 |
Dominion Energy Gas Holdings, LLC | Revolving Credit Facility | IRCA |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Short term demand note |  | 24,000,000 |  |  | 24,000,000 |  |  | 118,000,000 |
Dominion Energy Gas Holdings, LLC | Services provided by affiliates |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Commodity purchases from affiliates | [11] | 35,000,000 |  | 33,000,000 | 70,000,000 |  | 72,000,000 |  |
Dominion Energy Gas Holdings, LLC | Pension Benefits | Amounts Associated with the Dominion Pension Plan |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Amounts due from Dominion, noncurrent |  | 716,000,000 |  |  | 716,000,000 |  |  | 697,000,000 |
Dominion Energy 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 |  | 4,000,000 |  |  | 4,000,000 |  |  | 2,000,000 |
Dominion Energy Gas Holdings, LLC | Affiliate |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Imbalances receivable from affiliates |  | 1,000,000 |  |  | 1,000,000 |  |  | 2,000,000 |
Imbalances payable to affiliates | [12] | 1,000,000 |  |  | 1,000,000 |  |  | $ 4,000,000 |
Dominion Energy Gas Holdings, LLC | Affiliate | Services provided by affiliates |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |
Capital expenditures |  | $ 12,000,000 |  | $ 14,000,000 | $ 20,000,000 |  | $ 24,000,000 |  |
[1] | Noncurrent derivative assets are presented in other deferred charges and other assets in Dominion Energy’s Consolidated Balance Sheets.
[2] | Noncurrent derivative assets are presented in other deferred charges and other assets in Virginia Power's Consolidated Balance Sheets.
[3] | Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Dominion Energy’s Consolidated Balance Sheets.
[4] | Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in Virginia Power’s Consolidated Balance Sheets.
[5] | Includes capitalized expenditures of $37 million and $38 million for the three months ended June 30, 2017 and 2016, respectively, and $71 million and $77 million for the six months ended June 30, 2017 and 2016, respectively.
[6] | Virginia Power’s Consolidated Balance Sheet at December 31, 2016 has been derived from the audited Consolidated Balance Sheet at that date.
[7] | Amounts primarily attributable to Atlantic Coast Pipeline, a related-party VIE.
[8] | Dominion Energy Gas’ Consolidated Balance Sheet at December 31, 2016 has been derived from the audited Consolidated Balance Sheet at that date.
[9] | Represents amounts due from Atlantic Coast Pipeline, a related-party VIE.
[10] | Amounts are presented in other deferred charges and other assets in Dominion Energy Gas' Consolidated Balance Sheets.
[11] | Includes capitalized expenditures of $12 million and $14 million for the three months ended June 30, 2017 and 2016, respectively, and $20 million and $24 million for the six months ended June 30, 2017 and 2016, respectively.
[12] | Amounts are presented in other current liabilities in Dominion Energy Gas' Consolidated Balance Sheets.

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