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Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Detail) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | $ 264 | $ 1,137 | [1]
Derivative Asset, Noncurrent | [2] | 933 | 1,039 |
Derivatives Assets |  | 1,197 | 2,176 |
Derivative Liabilities, Current |  | 371 | 778 | [1]
Derivative Liabilities, Noncurrent | [3] | 518 | 626 |
Derivative Liabilities |  | 889 | 1,404 |
Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current | [4] | 91 | 765 | [5]
Derivative Asset, Noncurrent | [2] | 142 | 117 |
Derivatives Assets |  | 233 | 882 |
Derivative Liabilities, Current | [4] | 152 | 298 | [5]
Derivative Liabilities, Noncurrent | [3] | 184 | 158 |
Derivative Liabilities |  | 336 | 456 |
Commodity Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 157 | 532 |
Derivative Asset, Noncurrent |  | 291 | 237 |
Derivative Liabilities, Current |  | 309 | 700 |
Derivative Liabilities, Noncurrent |  | 84 | 226 |
Commodity Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 79 | 264 |
Derivative Asset, Noncurrent |  | 63 | 4 |
Derivative Liabilities, Current |  | 145 | 290 |
Derivative Liabilities, Noncurrent |  | 36 | 58 |
Interest Rate Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 106 | 605 |
Derivative Asset, Noncurrent |  | 642 | 802 |
Derivative Liabilities, Current |  | 55 | 70 |
Derivative Liabilities, Noncurrent |  | 348 | 307 |
Interest Rate Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 11 | 501 |
Derivative Asset, Noncurrent |  | 79 | 113 |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent |  | 62 | 7 |
Foreign currency exchange rate |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 1 |  |
Derivative Liabilities, Current |  | 7 | 8 |
Derivative Liabilities, Noncurrent |  | 86 | 93 |
Foreign currency exchange rate | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 1 |  |
Derivative Liabilities, Current |  | 7 | 8 |
Derivative Liabilities, Noncurrent |  | 86 | 93 |
Designated as Hedging Instrument |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 11 | 501 |
Derivative Asset, Noncurrent | [2] | 79 | 113 |
Derivatives Assets |  | 90 | 614 |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent | [3] | 62 | 7 |
Derivative Liabilities |  | 62 | 7 |
Designated as Hedging Instrument | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 11 | 501 |
Derivative Asset, Noncurrent | [2] | 79 | 113 |
Derivatives Assets |  | 90 | 614 |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent | [3] | 62 | 7 |
Derivative Liabilities |  | 62 | 7 |
Designated as Hedging Instrument | Commodity Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 0 | 0 |
Derivative Asset, Noncurrent |  | 0 | 0 |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent |  | 0 | 0 |
Designated as Hedging Instrument | Commodity Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 0 | 0 |
Derivative Asset, Noncurrent |  | 0 | 0 |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent |  | 0 | 0 |
Designated as Hedging Instrument | Interest Rate Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 11 | 501 |
Derivative Asset, Noncurrent |  | 79 | 113 |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent |  | 62 | 7 |
Designated as Hedging Instrument | Interest Rate Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 11 | 501 |
Derivative Asset, Noncurrent |  | 79 | 113 |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent |  | 62 | 7 |
Designated as Hedging Instrument | Foreign currency exchange rate |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 0 |  |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent |  | 0 | 0 |
Designated as Hedging Instrument | Foreign currency exchange rate | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 0 |  |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent |  | 0 | 0 |
Fair Value - Derivatives not under Hedge Accounting |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 253 | 636 |
Derivative Asset, Noncurrent | [2] | 854 | 926 |
Derivatives Assets |  | 1,107 | 1,562 |
Derivative Liabilities, Current |  | 371 | 778 |
Derivative Liabilities, Noncurrent | [3] | 456 | 619 |
Derivative Liabilities |  | 827 | 1,397 |
Fair Value - Derivatives not under Hedge Accounting | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 80 | 264 |
Derivative Asset, Noncurrent | [2] | 63 | 4 |
Derivatives Assets |  | 143 | 268 |
Derivative Liabilities, Current |  | 152 | 298 |
Derivative Liabilities, Noncurrent | [3] | 122 | 151 |
Derivative Liabilities |  | 274 | 449 |
Fair Value - Derivatives not under Hedge Accounting | Commodity Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 157 | 532 |
Derivative Asset, Noncurrent |  | 291 | 237 |
Derivative Liabilities, Current |  | 309 | 700 |
Derivative Liabilities, Noncurrent |  | 84 | 226 |
Fair Value - Derivatives not under Hedge Accounting | Commodity Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 79 | 264 |
Derivative Asset, Noncurrent |  | 63 | 4 |
Derivative Liabilities, Current |  | 145 | 290 |
Derivative Liabilities, Noncurrent |  | 36 | 58 |
Fair Value - Derivatives not under Hedge Accounting | Interest Rate Contract |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 95 | 104 |
Derivative Asset, Noncurrent |  | 563 | 689 |
Derivative Liabilities, Current |  | 55 | 70 |
Derivative Liabilities, Noncurrent |  | 286 | 300 |
Fair Value - Derivatives not under Hedge Accounting | Interest Rate Contract | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 0 | 0 |
Derivative Asset, Noncurrent |  | 0 | 0 |
Derivative Liabilities, Current |  | 0 | 0 |
Derivative Liabilities, Noncurrent |  | 0 | 0 |
Fair Value - Derivatives not under Hedge Accounting | Foreign currency exchange rate |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 1 |  |
Derivative Liabilities, Current |  | 7 | 8 |
Derivative Liabilities, Noncurrent |  | 86 | 93 |
Fair Value - Derivatives not under Hedge Accounting | Foreign currency exchange rate | Virginia Electric and Power Company |  |  |  |
Derivatives Fair Value [Line Items] |  |  |  |
Derivative Asset, Current |  | 1 |  |
Derivative Liabilities, Current |  | 7 | 8 |
Derivative Liabilities, Noncurrent |  | $ 86 | $ 93 |
[1] | Dominion Energy’s Consolidated Balance Sheet at December 31, 2022 has been derived from the audited Consolidated Balance Sheet at that date.
[2] | Noncurrent derivative assets are presented in other deferred charges and other assets in the Companies’ Consolidated Balance Sheets.
[3] | Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in the Companies’ Consolidated Balance Sheets.
[4] | See Note 19 for amounts attributable to affiliates.
[5] | Virginia Power’s Consolidated Balance Sheet at December 31, 2022 has been derived from the audited Consolidated Balance Sheet at that date.

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