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Significant Accounting Policies (Tables) | 6 Months Ended
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Jun. 30, 2018
Accounting Policies [Abstract] |
Reconciliation of Total Cash, Restricted Cash and Equivalents | The following table provides a reconciliation of the total cash, restricted cash and equivalents reported within the Companies’ Consolidated Balance Sheets to the corresponding amounts reported within the Companies’ Consolidated Statements of Cash Flows for the six months ended June 30, 2018 and 2017:
|  | Cash, Restricted Cash and Equivalents at End of Period |  |  | Cash, Restricted Cash and Equivalents at Beginning of Period |
|  | June 30, 2018 |  |  | June 30, 2017 |  |  | December 31, 2017 |  |  | December 31, 2016 |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 190 |  |  | $ | 260 |  |  | $ | 120 |  |  | $ | 261 |
Restricted cash and equivalents(1) |  |  | 164 |  |  |  | 64 |  |  |  | 65 |  |  |  | 61 |
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows |  | $ | 354 |  |  | $ | 324 |  |  | $ | 185 |  |  | $ | 322 |
Virginia Power |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 20 |  |  | $ | 44 |  |  | $ | 14 |  |  | $ | 11 |
Restricted cash and equivalents(1) |  |  | 10 |  |  |  | — |  |  |  | 10 |  |  |  | — |
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows |  | $ | 30 |  |  | $ | 44 |  |  | $ | 24 |  |  | $ | 11 |
Dominion Energy Gas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 5 |  |  | $ | 4 |  |  | $ | 4 |  |  | $ | 23 |
Restricted cash and equivalents (1) |  |  | 24 |  |  |  | 30 |  |  |  | 26 |  |  |  | 20 |
Cash, restricted cash and equivalents shown in the Consolidated Statements of Cash Flows |  | $ | 29 |  |  | $ | 34 |  |  | $ | 30 |  |  | $ | 43 |
(1) | Restricted cash and equivalent balances are presented within other current assets in the Companies’ Consolidated Balance Sheets.

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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