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Acquisitions and Dispositions (Schedule Of Discontinued Operations Income Statement) (Parenthetical) (Detail) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents | $ 422 | $ 268 | [1] | $ 189 |  | $ 120 |
Dominion Energy Gas Holdings, LLC |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents | 143 | 99 | [2] | $ 38 | [3] | $ 18 | [3]
East Ohio | Dominion Energy Gas Holdings, LLC |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents | $ 4 | $ 9 |  |  |  |  |
[1] | Dominion Energy’s Consolidated Balance Sheet at December 31, 2018 has been derived from the audited Consolidated Balance Sheet at that date.
[2] | Dominion Energy Gas’ Consolidated Balance Sheet at December 31, 2018 has been derived from the audited Consolidated Balance Sheet at that date.
[3] | At March 31, 2019, March 31, 2018, December 31, 2018 and December 31, 2017, Dominion Energy Gas had $4 million, $4 million, $9 million and $3 million of cash and cash equivalents included in current assets of discontinued operations, respectively.

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