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v3.19.3.a.u2

Preferred Stock (Narrative) (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Dec. 15, 2024 | Jun. 30, 2019 | Jun. 14, 2019 | Dec. 31, 2018
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares authorized | 20,000,000 | 20,000,000 |  |  |  |
Preferred Stock, Redemption Price Per Share | $ 1,020 | $ 1,020 |  |  |  |
Series B preferred stock value issued | $ 2,387 | $ 2,387 |  |  |  | $ 0
Dividend stock |  | $ 17 |  |  |  |
Scenario, Forecast |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred Stock, Redemption Price Per Share |  |  | $ 1,000 |  |  |
2019 Corporate Units |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Percentage Of Interest In Undivided Beneficial Ownership |  |  |  | 10.00% |  |
Total Long-term Debt |  |  |  |  | $ 1,600 |
Series B Preferred Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares authorized | 800,000 | 800,000 |  |  |  |
Dividends Payable, Amount Per Share | $ 1.9375 | $ 1.9375 |  |  |  |
Common Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Purchase Price Per Share Under Stock Purchase Contract | $ 50 | $ 50 |  |  |  |
Common Stock | 2019 Corporate Units |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Purchase Price Per Share Under Stock Purchase Contract |  |  |  |  | $ 100 |
Virginia Electric and Power Company |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares authorized | 10,000,000 | 10,000,000 |  |  |  | 10,000,000
Preferred stock shares issued | 0 | 0 |  |  |  | 0
Preferred stock shares outstanding | 0 | 0 |  |  |  | 0
Liquidation preference (in dollars per share) | $ 100 | $ 100 |  |  |  |
Dominion Energy |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Dividend rate percentage | 2.993% |  |  |  |  |
Dividend stock |  | $ 2 |  |  |  |
Dominion Energy | Preferred Class A |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares issued | 2,400,000 | 2,400,000 |  |  |  |
Preferred stock shares outstanding | 2,400,000 | 2,400,000 |  |  |  |
Dominion Energy | Series A Preferred Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares issued | 1,600,000 | 1,600,000 |  |  |  |
Preferred stock shares outstanding | 1,600,000 | 1,600,000 |  |  |  |
Dominion Energy | Series B Preferred Stock |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares issued | 800,000 | 800,000 |  |  |  |
Preferred stock shares outstanding | 800,000 | 800,000 |  |  |  |
Series B preferred stock value issued | $ 791 | $ 791 |  |  |  |
Issuance of costs |  | 9 |  |  |  |
Preferred stock liquidation value | $ 1,000 | $ 1,000 |  |  |  |
Dividend rate percentage |  | 4.65% |  |  |  |
DESC |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred stock shares authorized | 20,000,000 | 20,000,000 |  |  |  |
SCANA |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Preferred Stock Held By SCANA | 1,000 | 1,000 |  |  |  |

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