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Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions | Total | Common Units | Convertible Preferred Units | IPO | Total Common Shareholders' Equity | Total Common Shareholders' Equity Common Units | Total Common Shareholders' Equity Convertible Preferred Units | Total Common Shareholders' Equity IPO | Common Stock | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Noncontrolling Interests | Noncontrolling Interests Common Units | Noncontrolling Interests Convertible Preferred Units | Noncontrolling Interests IPO | Virginia Electric and Power Company | Virginia Electric and Power Company Common Stock | Virginia Electric and Power Company Other Paid-In Capital | Virginia Electric and Power Company Retained Earnings | Virginia Electric and Power Company Accumulated Other Comprehensive Income (Loss) | Dominion Gas Holdings, LLC | Dominion Gas Holdings, LLC Membership Interests | Dominion Gas Holdings, LLC Accumulated Other Comprehensive Income (Loss)
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Beginning Balance (in shares) at Dec. 31, 2013 |  |  |  |  |  |  |  |  |  | 581 |  |  |  |  |  |  |  |  | 275 |  |  |  |  |  |
Beginning Balance, value at Dec. 31, 2013 |  | $ 11,642 |  |  |  | $ 11,642 |  |  |  | $ 5,783 | $ 6,183 |  | $ (324) | $ 0 |  |  |  | $ 9,798 | $ 5,738 | $ 1,113 | $ 2,899 | $ 48 |  |  |
Beginning Balance, value at Dec. 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,427 | $ 3,485 | $ (58)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income including noncontrolling interests |  | 1,326 |  |  |  | 1,323 |  |  |  |  | 1,323 |  |  | 3 |  |  |  | 845 |  |  |  |  |  |  |
Dominion Midstream's acquisition of interest in Iroquois and Issuance of Dominion Midstream common units, net of offering costs |  |  |  |  | $ 392 |  |  |  | $ 0 |  |  |  |  |  |  |  | $ 392 |  |  |  |  |  |  |  |
Net income attributable to Dominion |  | 1,310 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 858 |  |  | 858 |  | 512 | 512 |
Equity contribution from parent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 | 1 |
Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (346) | (346) |
Issuance of stock-employee and direct stock purchase plans (in shares) |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of stock-employee and direct stock purchase plans |  | 205 |  |  |  | 205 |  |  |  | $ 205 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock awards and stock options exercised (net of change in unearned compensation), value |  | 14 |  |  |  | 14 |  |  |  | $ 14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other stock issuances (in shares) | [1] |  |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other stock issuances, value | [1] | 14 |  |  |  | 14 |  |  |  | $ 14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Present value of stock purchase contract payments related to RSNs | [2] | (143) |  |  |  | (143) |  |  |  | (143) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends |  | (1,411) |  |  |  | (1,411) |  |  |  |  | (1,411) | [2] |  |  |  |  |  | (603) |  |  | (603) |  |  |  |
Other comprehensive income (loss), net of tax |  | (92) |  |  |  | (92) |  |  |  |  |  |  | (92) |  |  |  |  | 2 |  |  |  | 2 | (28) |  | (28)
Other |  | 10 |  |  |  | 3 |  |  |  | $ 3 |  |  |  | 7 |  |  |  |  |  |  |  |  |  |  |
Beginning Balance, value at Dec. 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,566 | 3,652 | (86)
Ending Balance (in shares) at Dec. 31, 2014 |  |  |  |  |  |  |  |  |  | 585 |  |  |  |  |  |  |  |  | 275 |  |  |  |  |  |
Beginning Balance, value at Dec. 31, 2014 |  | 11,957 |  |  |  | 11,555 |  |  |  | $ 5,876 | 6,095 |  | (416) | 402 |  |  |  | 10,055 | $ 5,738 | 1,113 | 3,154 | 50 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income including noncontrolling interests |  | 1,923 |  |  |  | 1,899 |  |  |  |  | 1,899 |  |  | 24 |  |  |  | 1,087 |  |  |  |  |  |  |
Dominion Midstream's acquisition of interest in Iroquois and Issuance of Dominion Midstream common units, net of offering costs |  | 216 |  |  |  | 0 |  |  |  |  |  |  |  | 216 |  |  |  |  |  |  |  |  |  |  |
Acquisition of Four Brothers and Three Cedars |  | 47 |  |  |  | 0 |  |  |  |  |  |  |  | 47 |  |  |  |  |  |  |  |  |  |  |
Contributions from SunEdison to Four Brothers and Three Cedars |  | 103 |  |  |  | 0 |  |  |  |  |  |  |  | 103 |  |  |  |  |  |  |  |  |  |  |
Sale of interest in merchant solar projects |  | 205 |  |  |  | 26 |  |  |  | 26 |  |  |  | 179 |  |  |  |  |  |  |  |  |  |  |
Purchase of Dominion Midstream common units |  | (25) |  |  |  | (6) |  |  |  | $ (6) |  |  |  | (19) |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Dominion |  | 1,899 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,087 |  |  | 1,087 |  | 457 | 457 |
Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (692) | (692) |
Issuance of stock-employee and direct stock purchase plans (in shares) |  |  |  |  |  |  |  |  |  | 11 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of stock-employee and direct stock purchase plans |  | 786 |  |  |  | 786 |  |  |  | $ 786 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock awards and stock options exercised (net of change in unearned compensation), value |  | 13 |  |  |  | 13 |  |  |  | 13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends |  | (1,536) |  |  |  | (1,536) |  |  |  |  | (1,536) |  |  |  |  |  |  | (491) |  |  | (491) |  |  |  |
Dominion Midstream distributions |  | (16) |  |  |  | 0 |  |  |  |  |  |  |  | (16) |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | (58) |  |  |  | (58) |  |  |  |  |  |  | (58) |  |  |  |  | (10) |  |  |  | (10) | (13) |  | (13)
Other |  | (13) |  |  |  | (15) |  |  |  | $ (15) |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Beginning Balance, value at Dec. 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,318 | 3,417 | (99)
Ending Balance (in shares) at Dec. 31, 2015 |  |  |  |  |  |  |  |  |  | 596 |  |  |  |  |  |  |  |  | 275 |  |  |  |  |  |
Beginning Balance, value at Dec. 31, 2015 |  | 13,602 |  |  |  | 12,664 |  |  |  | $ 6,680 | 6,458 |  | (474) | 938 |  |  |  | 10,641 | $ 5,738 | 1,113 | 3,750 | 40 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income including noncontrolling interests |  | 2,212 |  |  |  | 2,123 |  |  |  |  | 2,123 |  |  | 89 |  |  |  | 1,218 |  |  |  |  |  |  |
Dominion Midstream's acquisition of interest in Iroquois and Issuance of Dominion Midstream common units, net of offering costs |  |  | $ 482 | $ 490 |  |  | $ 0 | $ 0 |  |  |  |  |  |  | $ 482 | $ 490 |  |  |  |  |  |  |  |  |
Contributions from SunEdison to Four Brothers and Three Cedars |  | 189 |  |  |  | 0 |  |  |  |  |  |  |  | 189 |  |  |  |  |  |  |  |  |  |  |
Sale of interest in merchant solar projects |  | 139 |  |  |  | 22 |  |  |  | 22 |  |  |  | 117 |  |  |  |  |  |  |  |  |  |  |
Purchase of Dominion Midstream common units |  | (17) |  |  |  | (3) |  |  |  | $ (3) |  |  |  | (14) |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Dominion |  | 2,123 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,218 |  |  | 1,218 |  | 392 | 392 |
Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (150) | (150) |
Issuance of stock-employee and direct stock purchase plans (in shares) |  |  |  |  |  |  |  |  |  | 32 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of stock-employee and direct stock purchase plans |  | 2,152 |  |  |  | 2,152 |  |  |  | $ 2,152 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock awards and stock options exercised (net of change in unearned compensation), value |  | 14 |  |  |  | 14 |  |  |  | 14 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Present value of stock purchase contract payments related to RSNs | [2] | (191) |  |  |  | (191) |  |  |  | (191) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax effect of Questar Pipeline contribution to Dominion Midstream |  | (116) |  |  |  | (116) |  |  |  | (116) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends |  | (1,789) |  |  |  | (1,727) |  |  |  |  | (1,727) |  |  | (62) |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss), net of tax |  | (325) |  |  |  | (325) |  |  |  |  |  |  | (325) |  |  |  |  | 6 |  |  |  | 6 | (24) |  | (24)
Other |  | (2) |  |  |  | (8) |  |  |  | $ (8) |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |
Beginning Balance, value at Dec. 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,536 | $ 3,659 | $ (123)
Ending Balance (in shares) at Dec. 31, 2016 |  |  |  |  |  |  |  |  |  | 628 |  |  |  |  |  |  |  |  | 275 |  |  |  |  |  |
Beginning Balance, value at Dec. 31, 2016 |  | $ 16,840 |  |  |  | $ 14,605 |  |  |  | $ 8,550 | $ 6,854 |  | $ (799) | $ 2,235 |  |  |  | $ 11,865 | $ 5,738 | $ 1,113 | $ 4,968 | $ 46 |  |  |
[1] | Contains shares issued in excess of principal amounts related to converted securities. See Note 17 for further information on convertible securities.
[2] | See Note 17 for further information.

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