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Operating Revenue (Schedule of Operating Revenue) (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | $ 4,081 | $ 3,362 | $ 11,457 | $ 9,631
Other revenues | [1] | 188 | 89 | 640 | 374
Operating revenue | [2] | 4,269 | 3,451 | 12,097 | 10,005
Regulated Electric Sales | Residential |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 1,440 | 1,036 | 3,180 | 2,641
Regulated Electric Sales | Commercial |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 962 | 737 | 2,347 | 1,897
Regulated Electric Sales | Industrial |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 227 | 143 | 474 | 371
Regulated Electric Sales | Government and Other Retail |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 244 | 224 | 658 | 647
Regulated Electric Sales | Wholesale |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 45 | 30 | 134 | 95
Nonregulated Electric Sales |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 197 | 322 | 688 | 1,022
Regulated Gas Sales | Residential |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 121 | 73 | 900 | 553
Regulated Gas Sales | Commercial |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 52 | 15 | 316 | 152
Regulated Gas Sales | Other |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 23 | 3 | 86 | 14
Nonregulated Gas Sales |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 51 | 42 | 369 | 139
Regulated Gas Transportation and Storage | FERC-regulated |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 248 | 266 | 772 | 800
Regulated Gas Transportation and Storage | State-regulated |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 168 | 138 | 547 | 472
Nonregulated gas transportation and storage |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 153 | 162 | 501 | 286
Other Regulated Revenues |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [3] | 54 | 38 | 180 | 132
Other Nonregulated Revenues |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [3],[4] | 96 | 133 | 305 | 410
Virginia Electric and Power Company |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 2,250 | 2,210 | 6,116 | 5,787
Other revenues | [1],[4] | 14 | 22 | 51 | 22
Operating revenue | [5] | 2,264 | 2,232 | 6,167 | 5,809
Virginia Electric and Power Company | Regulated Electric Sales | Residential |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 1,085 | 1,036 | 2,816 | 2,641
Virginia Electric and Power Company | Regulated Electric Sales | Commercial |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 732 | 737 | 2,049 | 1,897
Virginia Electric and Power Company | Regulated Electric Sales | Industrial |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 121 | 143 | 351 | 371
Virginia Electric and Power Company | Regulated Electric Sales | Government and Other Retail |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 224 | 224 | 625 | 647
Virginia Electric and Power Company | Regulated Electric Sales | Wholesale |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 31 | 30 | 97 | 95
Virginia Electric and Power Company | Other Regulated Revenues |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [3] | 36 | 30 | 124 | 95
Virginia Electric and Power Company | Other Nonregulated Revenues |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [4] | 21 | 10 | 54 | 41
Dominion Energy Gas Holdings, LLC |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 392 | 423 | 1,302 | 1,407
Other revenues |  |  |  | 1 | 1
Operating revenue | [6] | 392 | 423 | 1,303 | 1,408
Dominion Energy Gas Holdings, LLC | Regulated Gas Transportation and Storage | FERC-regulated |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [4] | 180 | 179 | 566 | 561
Dominion Energy Gas Holdings, LLC | Regulated Gas Transportation and Storage | State-regulated |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [4] | 139 | 131 | 460 | 450
Dominion Energy Gas Holdings, LLC | Regulated Gas Transportation and Storage | Residential |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 9 | 12 | 51 | 54
Dominion Energy Gas Holdings, LLC | Regulated Gas Transportation and Storage | Other |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 1 |  | 3 | 9
Dominion Energy Gas Holdings, LLC | Nonregulated gas transportation and storage |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [4] | 2 | 2 | 5 | 5
Dominion Energy Gas Holdings, LLC | Other Regulated Revenues |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [4] | 4 | 4 | 17 | 16
Dominion Energy Gas Holdings, LLC | Other Nonregulated Revenues |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [3],[4] | 3 | 3 | 7 | 9
Dominion Energy Gas Holdings, LLC | NGL Production |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [3],[4] | 31 | 42 | 112 | 146
Dominion Energy Gas Holdings, LLC | Management Service |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [4] | $ 23 | $ 50 | $ 81 | $ 157
[1] | Amounts above include alternative revenue of $9 million and $44 million at Dominion Energy and $9 million and $35 million at Virginia Power for the three and nine months ended September 30, 2019, respectively.
[2] | See Note 10 for amounts attributable to related parties.
[3] | Amounts above include $36 million and $28 million for the three months ended September 30, 2019, $108 million and $91 million for the three months ended September 30, 2018, $129 million and $101 million for the nine months ended September 30, 2019 and $170 million and $138 million for the nine months ended September 30, 2018 primarily consisting of NGL sales at Dominion Energy and Dominion Energy Gas, respectively, which are considered to be goods transferred at a point in time.
[4] | See Notes 10 and 20 for amounts attributable to related parties and affiliates
[5] | See Note 20 for amounts attributable to affiliates.
[6] | See Note 20 for amounts attributable to related parties.

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