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Acquisitions and Dispositions (Schedule of Major Classes of Assets and Liabilities Held for Sale in Discontinued Operations) (Detail) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021 | [1]
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Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |
Current assets held for sale |  | $ 1,009 | $ 25
Current liabilities held for sale |  | 225 |
Ullico Inc |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |
Current assets held for sale |  | 71 |
Property, plant and equipment, net |  | 499 |
Other deferred charges and other assets, including goodwill and intangible assets | [2] | 313 |
Current liabilities held for sale |  | 44 |
Long-term debt |  | 1 |
Deferred credits and other liabilities |  | $ 176 |
[1] | Dominion Energy’s Consolidated Balance Sheet at December 31, 2021 has been derived from the audited Consolidated Balance Sheet at that date.
[2] | Includes goodwill of $110 million

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