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Acquisitions and Dispositions (Schedule of Major Classes of Assets and Liabilities Reported As Held for Sale in Discontinued Operations) (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |
Current assets | [1] | $ 1,482 |  | $ 535
Current liabilities |  | 625 |  | 1,039
Dominion Energy Gas Holdings, LLC | GT&S Transaction |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |
Current assets | [2] |  |  | 445
Equity method investments | [3] |  |  | 276
Property, plant and equipment, net |  |  |  | 10,764
Other deferred charges and other assets, including goodwill and intangible assets | [4] |  |  | 1,553
Current liabilities | [5] |  |  | 1,002
Long-term debt |  |  |  | 4,401
Other deferred credits and liabilities |  |  |  | 773
Dominion Energy Gas Holdings, LLC | Q-Pipe Transaction |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |
Current assets | [2] | 47 | [6] | 49
Equity method investments | [3] | 35 | [6] | 36
Property, plant and equipment, net |  | 1,113 | [6] | 1,103
Other deferred charges and other assets, including goodwill and intangible assets | [4] | 224 | [6] | 225
Current liabilities | [5] | 30 | [6] | 37
Long-term debt |  | 426 | [6] | 425
Other deferred credits and liabilities |  | $ 154 | [6] | $ 155
[1] | See Note 9 for amounts attributable to related parties.
[2] | Includes cash and cash equivalents of $20 million as of December 31, 2019 within the GT&S Transaction and $7 million and $11 million as of December 31, 2020 and December 31, 2019, respectively, within the Q-Pipe Transaction.
[3] | Comprised of equity method investments in Iroquois and JAX LNG within the GT&S Transaction and White River Hub within the Q-Pipe Transaction.
[4] | Includes goodwill of $1.4 billion at December 31, 2019 within the GT&S Transaction and $191 million at both December 31, 2020 and December 31, 2019 within the Q-Pipe Transaction.
[5] | Includes current portions of long-term debt of $699 million as of December 31, 2019, within the GT&S Transaction.
[6] | All amounts at December 31, 2020 are classified as current in Dominion Energy’s Consolidated Balance Sheets.

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