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Acquisitions and Dispositions (Schedule of Results of Operations Reported As Discontinued Operations) (Detail) - Dominion Energy Gas Holdings, LLC $ in Millions | 3 Months Ended
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Mar. 31, 2019 USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Net income (loss) from discontinued operations | $ 54
East Ohio |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Operating revenue | 229
Depreciation and amortization | 21
Other operating expenses | 148
Other income | 18
Interest and related charges | 10
Income tax expense | 14
Net income (loss) from discontinued operations | 54
DGP |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |
Operating revenue | 45
Depreciation and amortization | 1
Other operating expenses | $ 44

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