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Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets | [1] | $ 753 | $ 1,137 |
Total noncurrent derivative assets | [2] | 597 | 1,039 | [3]
Total derivative assets |  | 1,350 | 2,176 |
Total current derivative liabilities | [4] | 376 | 778 |
Total noncurrent derivative liabilities | [5] | 321 | 626 | [6]
Total derivative liabilities |  | 697 | 1,404 |
Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets | [1] | 234 | 765 |
Total noncurrent derivative assets | [2] | 64 | 117 | [3]
Total derivative assets |  | 298 | 882 |
Total current derivative liabilities | [4] | 244 | 298 |
Total noncurrent derivative liabilities | [5] | 72 | 158 | [6]
Total derivative liabilities |  | 316 | 456 |
Commodity Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 312 | 532 |
Total noncurrent derivative assets |  | 238 | 237 |
Total current derivative liabilities |  | 244 | 700 |
Total noncurrent derivative liabilities |  | 55 | 226 |
Commodity Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 91 | 264 |
Total noncurrent derivative assets |  | 26 | 4 |
Total current derivative liabilities |  | 188 | 290 |
Total noncurrent derivative liabilities |  | 44 | 58 |
Interest Rate Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 441 | 605 |
Total noncurrent derivative assets |  | 359 | 802 |
Total current derivative liabilities |  | 121 | 70 |
Total noncurrent derivative liabilities |  | 238 | 307 |
Interest Rate Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 143 | 501 |
Total noncurrent derivative assets |  | 38 | 113 |
Total current derivative liabilities |  | 45 | 0 |
Total noncurrent derivative liabilities |  | 0 | 7 |
Foreign currency exchange rate |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative liabilities |  | 11 | 8 |
Total noncurrent derivative liabilities |  | 28 | 93 |
Foreign currency exchange rate | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative liabilities |  | 11 | 8 |
Total noncurrent derivative liabilities |  | 28 | 93 |
Designated as Hedging Instrument |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets | [1] | 143 | 501 |
Total noncurrent derivative assets | [2] | 38 | 113 | [3]
Total derivative assets |  | 181 | 614 |
Total current derivative liabilities | [4] | 45 | 0 |
Total noncurrent derivative liabilities | [5] | 0 | 7 | [6]
Total derivative liabilities |  | 45 | 7 |
Designated as Hedging Instrument | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets | [1] | 143 | 501 |
Total noncurrent derivative assets | [2] | 38 | 113 | [3]
Total derivative assets |  | 181 | 614 |
Total current derivative liabilities | [4] | 45 | 0 |
Total noncurrent derivative liabilities | [5] | 0 | 7 | [6]
Total derivative liabilities |  | 45 | 7 |
Designated as Hedging Instrument | Commodity Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 0 | 0 |
Total noncurrent derivative assets |  | 0 | 0 |
Total current derivative liabilities |  | 0 | 0 |
Total noncurrent derivative liabilities |  | 0 | 0 |
Designated as Hedging Instrument | Commodity Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 0 | 0 |
Total noncurrent derivative assets |  | 0 | 0 |
Total current derivative liabilities |  | 0 | 0 |
Total noncurrent derivative liabilities |  | 0 | 0 |
Designated as Hedging Instrument | Interest Rate Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 143 | 501 |
Total noncurrent derivative assets |  | 38 | 113 |
Total current derivative liabilities |  | 45 | 0 |
Total noncurrent derivative liabilities |  | 0 | 7 |
Designated as Hedging Instrument | Interest Rate Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 143 | 501 |
Total noncurrent derivative assets |  | 38 | 113 |
Total current derivative liabilities |  | 45 | 0 |
Total noncurrent derivative liabilities |  | 0 | 7 |
Designated as Hedging Instrument | Foreign currency exchange rate |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative liabilities |  | 0 | 0 |
Total noncurrent derivative liabilities |  | 0 | 0 |
Designated as Hedging Instrument | Foreign currency exchange rate | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative liabilities |  | 0 | 0 |
Total noncurrent derivative liabilities |  | 0 | 0 |
Fair Value - Derivatives not under Hedge Accounting |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets | [1] | 610 | 636 |
Total noncurrent derivative assets | [2] | 559 | 926 | [3]
Total derivative assets |  | 1,169 | 1,562 |
Total current derivative liabilities | [4] | 331 | 778 |
Total noncurrent derivative liabilities | [5] | 321 | 619 | [6]
Total derivative liabilities |  | 652 | 1,397 |
Fair Value - Derivatives not under Hedge Accounting | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets | [1] | 91 | 264 |
Total noncurrent derivative assets | [2] | 26 | 4 | [3]
Total derivative assets |  | 117 | 268 |
Total current derivative liabilities | [4] | 199 | 298 |
Total noncurrent derivative liabilities | [5] | 72 | 151 | [6]
Total derivative liabilities |  | 271 | 449 |
Fair Value - Derivatives not under Hedge Accounting | Commodity Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 312 | 532 |
Total noncurrent derivative assets |  | 238 | 237 |
Total current derivative liabilities |  | 244 | 700 |
Total noncurrent derivative liabilities |  | 55 | 226 |
Fair Value - Derivatives not under Hedge Accounting | Commodity Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 91 | 264 |
Total noncurrent derivative assets |  | 26 | 4 |
Total current derivative liabilities |  | 188 | 290 |
Total noncurrent derivative liabilities |  | 44 | 58 |
Fair Value - Derivatives not under Hedge Accounting | Interest Rate Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 298 | 104 |
Total noncurrent derivative assets |  | 321 | 689 |
Total current derivative liabilities |  | 76 | 70 |
Total noncurrent derivative liabilities |  | 238 | 300 |
Fair Value - Derivatives not under Hedge Accounting | Interest Rate Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative assets |  | 0 | 0 |
Total noncurrent derivative assets |  | 0 | 0 |
Total current derivative liabilities |  | 0 | 0 |
Total noncurrent derivative liabilities |  | 0 | 0 |
Fair Value - Derivatives not under Hedge Accounting | Foreign currency exchange rate |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative liabilities |  | 11 | 8 |
Total noncurrent derivative liabilities |  | 28 | 93 |
Fair Value - Derivatives not under Hedge Accounting | Foreign currency exchange rate | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Total current derivative liabilities |  | 11 | 8 |
Total noncurrent derivative liabilities |  | $ 28 | $ 93 |
[1] | Includes $54 million and $118 million reported in current assets held for sale in Dominion Energy’s Consolidated Balance Sheets at December 31, 2023 and 2022, respectively.
[2] | Virginia Power’s noncurrent derivative assets are presented in other deferred charges and other assets in its Consolidated Balance Sheets.
[3] | Includes $1 million reported in noncurrent assets held for sale in Dominion Energy's Consolidated Balance Sheets at December 31, 2022.
[4] | Includes $30 million and $6 million reported in current liabilities held for sale in Dominion Energy’s Consolidated Balance Sheets at December 31, 2023 and 2022, respectively.
[5] | Virginia Power’s noncurrent derivative liabilities are presented in other deferred credits and other liabilities in its Consolidated Balance Sheets.
[6] | Includes $1 million reported in noncurrent liabilities held for sale in Dominion Energy's Consolidated Balance Sheets at December 31, 2022.

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