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Acquisitions and Dispositions (Schedule of Significant Non Cash Items and Capital Expenditure) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Significant noncash items |  |  |
Accrued capital expenditures | [1],[2],[3] | $ 201 | $ 175
Dominion Energy Gas Holdings, LLC |  |  |
Significant noncash items |  |  |
Accrued capital expenditures | [2] | 31 | 56
East Ohio | Dominion Energy Gas Holdings, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Capital expenditures |  | 65 | 58
Significant noncash items |  |  |
Accrued capital expenditures |  | 6 | 6
DGP | Dominion Energy Gas Holdings, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Capital expenditures |  | $ 3 | $ 1
[1] | See Note 16 for noncash financing activities related to the acquisition of the public interest in Dominion Energy Midstream.
[2] | See Note 2 for noncash investing and financing activities related to the adoption of a new accounting standard for leasing arrangements.
[3] | See Note 3 for noncash investing and financing activities related to the SCANA Combination.

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