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Operating Revenue (Schedule of Operating Revenue Recognition from Contracts with Customers) (Detail) - Adjustments for New Accounting Pronouncement - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | $ 15,764 | $ 12,895
Operating revenue |  | 16,572 | 13,366
Other |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 4 |
Regulated Electric Sales | Residential |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 4,325 | 3,413
Regulated Electric Sales | Commercial |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 3,219 | 2,503
Regulated Electric Sales | Industrial |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 683 | 490
Regulated Electric Sales | Government and Other Retail |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 873 | 854
Regulated Electric Sales | Wholesale |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 176 | 137
Nonregulated Electric Sales |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 926 | 1,294
Other |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue | [1],[2] | 808 | 471
Regulated Gas Sales | Residential |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 1,343 | 818
Regulated Gas Sales | Commercial |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 457 | 221
Regulated Gas Sales | Other |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 117 | 36
Nonregulated Gas Sales |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 496 | 214
Regulated Gas Transportation and Storage | FERC-regulated |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 1,057 | 1,091
Regulated Gas Transportation and Storage | State-regulated |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 742 | 640
Nonregulated Gas Transportation And Storage |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 676 | 442
Other Regulated Revenue |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 259 | 179
Other Nonregulated Revenue |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue | [1],[3] | 415 | 563
Virginia Electric and Power Company |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 8,036 | 7,584
Operating revenue |  | 8,108 | 7,619
Virginia Electric and Power Company | Regulated Electric Sales | Residential |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 3,657 | 3,413
Virginia Electric and Power Company | Regulated Electric Sales | Commercial |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 2,712 | 2,503
Virginia Electric and Power Company | Regulated Electric Sales | Industrial |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 455 | 490
Virginia Electric and Power Company | Regulated Electric Sales | Government and Other Retail |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 823 | 854
Virginia Electric and Power Company | Regulated Electric Sales | Wholesale |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 128 | 137
Virginia Electric and Power Company | Other |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue | [2],[3] | 72 | 35
Virginia Electric and Power Company | Other Regulated Revenue |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 190 | 132
Virginia Electric and Power Company | Other Nonregulated Revenue |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue | [1],[3] | 71 | 55
Dominion Energy Gas Holdings, LLC |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 2,165 | 2,002
Operating revenue |  | 2,169 | 1,996
Dominion Energy Gas Holdings, LLC | Other |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  |  | (6)
Dominion Energy Gas Holdings, LLC | Regulated Gas Sales | Wholesale |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 9 | 25
Dominion Energy Gas Holdings, LLC | Nonregulated Gas Sales |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue | [3] | 6 | 7
Dominion Energy Gas Holdings, LLC | Regulated Gas Transportation and Storage |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 1,300 | 1,249
Dominion Energy Gas Holdings, LLC | Nonregulated Gas Transportation And Storage |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue |  | 676 | 442
Dominion Energy Gas Holdings, LLC | Management Service Revenues |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue | [3] | 162 | 257
Dominion Energy Gas Holdings, LLC | Other Regulated Revenue |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue | [1],[3] | 7 | 19
Dominion Energy Gas Holdings, LLC | Other Nonregulated Revenue |  |  |
Public Utilities General Disclosures [Line Items] |  |  |
Operating revenue | [1],[3] | $ 5 | $ 3
[1] | Amounts above include sales which are considered to be goods transferred at a point in time. For the years ended December 31, 2019 and 2018, such amounts included $171 million and $241 million, respectively, at Dominion Energy and $5 million and $10 million, respectively, at Dominion Energy Gas, primarily consisting of NGL sales. Additionally, amounts above include sales of renewable energy credits. For the years ended December 31, 2019 and 2018, such sales were $24 million and $ 17 million, respectively, at Dominion Energy and $17 million and $11 million, respectively, at Virginia Power.
[2] | Includes alternative revenue of $66 million and $52 million for the year ended December 31, 2019 at Dominion Energy and Virginia Power, respectively, and $15 million for year ended December 31, 2018 at both Dominion Energy and Virginia Power.
[3] | See Notes 9 and 25 for amounts attributable to related parties and affiliates.

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