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Acquisitions and Dispositions (Schedule of Unaudited Pro Forma Information) (Details) - Dominion Questar Corporation $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2016 USD ($) $ / shares | [1]
Business Acquisition [Line Items] |
Operating Revenue | $ | $ 3,377
Net income attributable to Dominion | $ | $ 613
Earnings Per Common Share – Basic (in dollars per share) | $ / shares | $ 1.03
Earnings Per Common Share – Diluted (in dollars per share) | $ / shares | $ 1.03
[1] | Amounts include adjustments for non-recurring costs directly related to the Dominion Questar Combination.

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