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Derivatives and Hedge Accounting Activities (Fair Value of Derivatives) (Parenthetical) (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Derivatives Fair Value [Line Items] |  |  |
Current derivative assets | [1] | $ 67 | $ 68
Noncurrent derivative assets | [2] | 330 | 25
Other Current Assets |  |  |
Derivatives Fair Value [Line Items] |  |  |
Current derivative assets |  | 63 | 61
Other Deferred Charges and Other Assets |  |  |
Derivatives Fair Value [Line Items] |  |  |
Noncurrent derivative assets |  | 330 | 16
Other Current Liabilities |  |  |
Derivatives Fair Value [Line Items] |  |  |
Current derivative liabilities |  | 412 | 394
Other Deferred Credits and Other Liabilities |  |  |
Derivatives Fair Value [Line Items] |  |  |
Noncurrent derivative liabilities |  | $ 71 | $ 329
[1] | Current derivative assets include $63 million and $61 million in other current assets in Dominion Energy’s Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively. The remainder is recorded in current assets held for sale in Dominion Energy’s Consolidated Balance Sheets.
[2] | Noncurrent derivative assets include $330 million and $16 million in other deferred charges and other assets in Dominion Energy’s Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively. The remainder is recorded in noncurrent assets held for sale in Dominion Energy’s Consolidated Balance Sheets.

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