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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 |  | 501 | 532 | 1,595 | 1,428
Other revenues |  | 1 | 1 | 3 | 3
Operating revenue | [6] | 502 | 533 | 1,598 | 1,431
Dominion Energy Gas Holdings, LLC | Regulated Gas Sales | Wholesale |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  |  |  | 2 | 6
Dominion Energy Gas Holdings, LLC | Nonregulated Gas Sales |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [4] | 1 | 2 | 4 | 5
Dominion Energy Gas Holdings, LLC | Regulated Gas Transportation and Storage |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 306 | 300 | 952 | 917
Dominion Energy Gas Holdings, LLC | Nonregulated gas transportation and storage |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 153 | 162 | 501 | 286
Dominion Energy Gas Holdings, LLC | Other Regulated Revenues |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [3] | 3 | 4 | 8 | 17
Dominion Energy Gas Holdings, LLC | Other Nonregulated Revenues |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [3],[4] | 1 | 1 | 2 | 2
Dominion Energy Gas Holdings, LLC | Management Service |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers | [4] | $ 37 | $ 63 | $ 126 | $ 195
[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 $1 million for the three months ended September 30, 2019, $108 million and $3 million for the three months ended September 30, 2018, $129 million and $4 million for the nine months ended September 30, 2019 and $170 million and $8 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. In addition, the amounts include $12 million and $19 million of sales of renewable energy credits at Dominion Energy for the three and nine months ended September 30, 2019, respectively, $11 million and $14 million at Virginia Power for the three and nine months ended September 30, 2019, respectively, and $10 million and $11 million at both Dominion Energy and Virginia Power for the three and nine months ended September 30, 2018, 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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