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Related-Party Transactions (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Virginia Electric and Power Company |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Commodity purchases from affiliates |  | $ 930 | $ 674 | $ 571
Services provided by affiliates | [1] | 450 | 453 | 454
Virginia Electric and Power Company | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Services provided to related parties |  | 24 | 25 | 22
Dominion Energy Gas Holdings, LLC |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Services provided to related parties | [2] | 216 | 156 | 128
Commodity purchases from affiliates |  | 58 | 70 | 69
Services provided by affiliates | [3] | 131 | 143 | 141
Other receivables | [4] | 13 | 12 |
Customer receivables from related parties |  | 1 | 1 |
Affiliated notes receivable | [5] | 16 | 20 |
Dominion Energy Gas Holdings, LLC | Affiliated Entity |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Services provided to related parties |  | 6 | 5 | $ 9
Imbalances receivable from affiliates |  | 1 | $ 1 |
Imbalances payable to affiliates | [6] | $ 13 |  |
[1] | Includes capitalized expenditures of $145 million, $144 million and $144 million for the year ended December 31, 2018, 2017 and 2016, respectively.
[2] | Amounts primarily attributable to Atlantic Coast Pipeline, a related party VIE.
[3] | Includes capitalized expenditures of $37 million, $45 million and $49 million for the year ended December 31, 2018, 2017 and 2016, respectively.
[4] | Represents amounts due from Atlantic Coast Pipeline, a related party VIE.
[5] | Amounts are presented in other deferred charges and other assets in Dominion Energy Gas' Consolidated Balance Sheets.
[6] | Amounts are presented in other current liabilities in Dominion Energy Gas' Consolidated Balance Sheets.

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