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v3.23.1

Investments (Narrative) (Detail) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Earnings from equity method investees |  |  | $ 80 | $ 80 |  |
Net losses from discontinued operations including noncontrolling interest | [1] |  | 5 | (19) |  |
Distributions received from investment |  |  | 85 | 76 |  |
Equity method affiliates includes cash and accrued amounts of contributions |  |  | 10 | 74 |  |
Equity method investment goodwill |  |  | 9 |  | $ 9 |
Income loss from continuing operations before income taxes extraordinary items noncontrolling interest |  |  | 1,223 | 928 |  |
Contributions to equity method affiliates |  |  | 10 | $ 15 |  |
Assets |  |  | 9,605 |  | 9,850 | [2]
Liabilities |  |  | $ 12,762 |  | 13,450 | [2]
Wrangler Retail Gas Holdings LLC | Gas Supply, Inc. |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Ownership interest percentage of limited partner interests |  |  |  | 15.00% |  |
Cash consideration from sale of noncontrolling interest |  |  |  | $ 85 |  |
Amount of gain from sale |  |  |  | 11 |  |
Amount of gain from sale, after tax |  |  |  | 8 |  |
Dominion Energy Virginia |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Cash consideration from sale of noncontrolling interest |  | $ 120 |  |  |  |
Amount of gain from sale |  |  |  | 23 |  |
Amount of gain from sale, after tax |  |  |  | 16 |  |
Limited partnership interest sale transaction, proceeds received |  | $ 60 |  | $ 60 |  |
Percentage ownership in total units |  | 50.00% | 50.00% | 50.00% |  |
Initial fair value |  | $ 60 |  | $ 60 |  |
Atlantic Coast Pipeline |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Net losses from discontinued operations including noncontrolling interest |  |  | $ 1 | 2 |  |
Contributions to equity method affiliates |  |  | 6 | 0 |  |
Atlantic Coast Pipeline | Other Current Liabilities |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Liabilities from abandonment of project |  |  | 100 |  | 114 |
Cove Point |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Distributions received from investment |  |  | $ 83 | $ 76 |  |
Cove Point | Cove Point | GT&S Transaction |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Percentage of noncontrolling limited partnership interest retained |  |  | 50.00% |  |  |
Finite Lived Equity Method Investment Basis Difference |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Carrying amount of investment that exceeded share of underlying equity |  |  | $ 217 |  | 223 |
Equity method investment goodwill |  |  |  |  | (1) |
Finite Lived Equity Method Investment Basis Difference | Cove Point |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity method investment goodwill |  |  | 213 |  | 215 |
Trading Securities |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Rabbi trust securities |  |  | $ 108 |  | $ 111 |
[1] | Includes income tax expense (benefit) of $(1) million and $6 million for the three months ended three months ended March 31, 2023 and 2022, respectively.
[2] | Dominion Energy’s Consolidated Balance Sheet at December 31, 2022 has been derived from the audited Consolidated Balance Sheet at that date.

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