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Acquisitions and Dispositions (Schedule of Disposal Groups, Including Discontinued Operations Consolidated Balance Sheets) (Detail) - Dominion Energy Gas Holdings LLC [Member] - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Business Acquisition And Dispositions [Line Items] |  |  |  |
Current assets of discontinued operations |  | $ 326 | $ 444 | [1]
Noncurrent assets of discontinued operations |  | 6,051 | 5,849 | [1]
Current liabilities of discontinued operations |  | 1,030 | 1,273 | [1]
Noncurrent liabilities of discontinued operations |  | 3,177 | 2,896 | [1]
East Ohio [Member] |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |
Current assets of discontinued operations | [2] | 303 | 423 |
Investments |  | 2 | 2 |
Property, plant and equipment, net |  | 3,790 | 3,669 |
Regulatory assets |  | 647 | 711 |
Other deferred charges and other assets, including goodwill and intangible assets |  | 1,418 | 1,275 |
Noncurrent assets of discontinued operations |  | 5,857 | 5,657 |
Current liabilities of discontinued operations |  | 1,014 | 1,262 |
Long-term debt |  | 1,552 | 1,300 |
Deferred income taxes and investment tax credits |  | 733 | 716 |
Regulatory liabilities |  | 768 | 747 |
Other deferred credits and liabilities |  | 112 | 108 |
Noncurrent liabilities of discontinued operations |  | 3,165 | 2,871 |
DGP [Member] |  |  |  |
Business Acquisition And Dispositions [Line Items] |  |  |  |
Current assets of discontinued operations | [3] | 23 | 21 |
Noncurrent assets of discontinued operations | [4] | 194 | 192 |
Current liabilities of discontinued operations |  | 16 | 11 |
Noncurrent liabilities of discontinued operations |  | $ 12 | $ 25 |
[1] | Dominion Energy Gas’ Consolidated Balance Sheet at December 31, 2018 has been derived from the audited Consolidated Balance Sheet at that date.
[2] | Includes cash and cash equivalents of $4 million and $9 million as of June 30, 2019 and December 31, 2018, respectively.
[3] | Includes cash and cash equivalents of $8 million and less than a million dollars as of June 30, 2019 and December 31, 2018, respectively.
[4] | Primarily property, plant and equipment, net.

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