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Operating Revenue (Schedule of Operating Revenue) (Parenthetical) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | $ 3,794 | $ 3,084 | $ 8,341 | $ 6,924
Other revenues | [1],[2] | (198) | (46) | (466) | (16)
GT&S Transaction |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Revenue associated with discontinued operations |  |  | 1 |  | 2
NGL Midstream | Transferred at a Point in Time |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 14 | 8 | 25 | 15
Renewable Energy Investment Tax Credits |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 7 | 7 | 11 | 13
Alternative Revenue Programs |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Other revenues |  | 40 | 25 | 70 | 47
Virginia Electric and Power Company |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | 2,239 | 1,723 | 4,435 | 3,530
Other revenues | [1],[3] | (64) | 18 | (93) | 41
Virginia Electric and Power Company | Renewable Energy Investment Tax Credits |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  |  | 5 |  | 9
Virginia Electric and Power Company | Alternative Revenue Programs |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Other revenues |  | 19 | $ 18 | 27 | $ 38
Virginia Electric and Power Company | Maximum | Renewable Energy Investment Tax Credits |  |  |  |  |
Public Utilities General Disclosures [Line Items] |  |  |  |  |
Operating revenue from contracts with customers |  | $ 1 |  | $ 1 |
[1] | Includes alternative revenue of $40 million and $25 million at Dominion Energy and $19 million and $18 million at Virginia Power for the three months ended June 30, 2022 and 2021, respectively, and $70 million and $47 million at Dominion Energy and $27 million and $38 million at Virginia Power for the six months ended June 30, 2022 and 2021, respectively.
[2] | Includes revenue associated with services provided to discontinued operations of $1 million and $2 million for the three and six months ended June 30, 2021, respectively.
[3] | See Note 19 for amounts attributable to affiliates.

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