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Acquisitions and Dispositions (Schedule of Preliminary Allocation of Purchase Price to Assets Acquired and Liabilities Assumed) (Detail) - USD ($) $ in Millions | Mar. 31, 2019 | Jan. 31, 2019 | Dec. 31, 2018
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Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] |  |  |  |  |
Goodwill |  | $ 8,960 |  | $ 6,410 | [1]
SCANA |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets [Abstract] |  |  |  |  |
Total current assets | [2] |  |  | 1,772 |
Investments |  |  |  | 224 |
Property, plant and equipment | [3] |  |  | 11,006 |
Goodwill |  |  |  | 2,550 |
Regulatory assets |  |  | $ 2,800 | 3,940 | [4]
Other deferred charges and other assets, including intangible assets |  |  |  | 430 |
Total Assets |  |  |  | 19,922 |
Total current liabilities |  |  |  | 1,515 |
Long-term debt |  |  |  | 6,707 |
Deferred income taxes |  |  |  | 1,100 |
Regulatory liabilities |  |  |  | 2,662 |
Other deferred credits and other liabilities |  |  |  | 1,099 |
Total Liabilities |  |  | $ 6,900 | 13,083 |
Total purchase price | [5] |  |  | $ 6,839 |
[1] | Dominion Energy’s Consolidated Balance Sheet at December 31, 2018 has been derived from the audited Consolidated Balance Sheet at that date.
[2] | Includes $389 million of cash, restricted cash and equivalents, of which $115 million is considered restricted.
[3] | Includes $105 million of certain property, plant and equipment associated with the NND Project for which Dominion Energy committed to forgo recovery in accordance with the SCANA Merger Approval Order. As a result, Dominion Energy’s Consolidated Statement of Income for the three months ended March 31, 2019 includes a charge of $105 million ($79 million after-tax), included in impairment of assets and other charges.
[4] | Includes $264 million of certain income tax-related regulatory assets associated with the NND Project for which Dominion Energy committed to forgo recovery in accordance with the SCANA Merger Approval Order. See Note 5 for additional information.
[5] | Includes stock-based compensation awards with an estimated fair value of $21 million.

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