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Quarterly Financial and Common Stock Data (Unaudited) (Quarterly Financial and Common Stock Data) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue | $ 3,086 | $ 3,132 | $ 2,598 | $ 2,921 | $ 2,556 | $ 2,971 | $ 2,747 | $ 3,409 | $ 11,737 |  | $ 11,683 |  | $ 12,436 |
Income from operations | 819 | 1,145 | 781 | 882 | 638 | 1,123 | 773 | 1,002 | 3,627 |  | 3,536 |  | 2,721 |
Net income including noncontrolling interests | 491 | 728 | 462 | 531 | 366 | 599 | 418 | 540 | 2,212 |  | 1,923 |  | 1,326 |
Net income (loss) attributable to Dominion | $ 457 | $ 690 | $ 452 | $ 524 | $ 357 | $ 593 | $ 413 | $ 536 | $ 2,123 |  | $ 1,899 |  | $ 1,310 |
Net income attributable to Dominion- Basic (in dollars per share) | $ 0.73 | $ 1.10 | $ 0.73 | $ 0.88 | $ 0.60 | $ 1.00 | $ 0.70 | $ 0.91 | $ 3.44 |  | $ 3.21 |  | $ 2.25 |
Net income attributable to Dominion - Diluted (in dollars per share) | 0.73 | 1.10 | 0.73 | 0.88 | 0.60 | 1.00 | 0.70 | 0.91 | 3.44 |  | 3.20 |  | 2.24 |
Dividends declared per common share | $ 0.7 | $ 0.7 | $ 0.7 | $ 0.70 | $ 0.6475 | $ 0.6475 | $ 0.6475 | $ 0.6475 | $ 2.80 |  | $ 2.59 |  | $ 2.40 |
Virginia Electric and Power Company |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue | $ 1,711 | $ 2,211 | $ 1,776 | $ 1,890 | $ 1,614 | $ 2,058 | $ 1,813 | $ 2,137 | $ 7,588 | [1] | $ 7,622 | [1] | $ 7,579 | [1]
Income from operations | 369 | 914 | 553 | 514 | 374 | 741 | 481 | 525 | 2,350 |  | 2,121 |  | 1,724 |
Net income (loss) attributable to Dominion | 172 | 503 | 280 | 263 | 187 | 385 | 246 | 269 | 1,218 |  | 1,087 |  | 858 |
Dominion Gas Holdings, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue | 457 | 382 | 368 | 431 | 425 | 365 | 395 | 531 | 1,638 | [2] | 1,716 | [2] | 1,898 | [2]
Income from operations | 175 | 133 | 186 | 175 | 163 | 202 | 153 | 271 | 669 |  | 789 |  | 851 |
Net income (loss) attributable to Dominion | $ 106 | $ 83 | $ 105 | $ 98 | $ 100 | $ 111 | $ 85 | $ 161 | $ 392 |  | $ 457 |  | $ 512 |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price (in dollars per share) | $ 77.32 | $ 78.97 | $ 77.93 | $ 75.18 | $ 74.88 | $ 76.59 | $ 74.34 | $ 79.89 | $ 77.32 |  | $ 74.88 |  |  |
Common stock market value (high) (in dollars per share) |  |  |  |  |  |  |  |  | 78.97 |  | 79.89 |  |  |
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Price (in dollars per share) | $ 69.51 | $ 72.49 | $ 68.71 | $ 66.25 | $ 64.54 | $ 66.65 | $ 66.52 | $ 68.25 | 69.51 |  | 64.54 |  |  |
Common stock market value (low) (in dollars per share) |  |  |  |  |  |  |  |  | $ 66.25 |  | $ 64.54 |  |  |
[1] | See Note 24 for amounts attributable to affiliates.
[2] | See Note 24 for amounts attributable to related parties.

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