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Operating Segments (Tables) | 6 Months Ended
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Jun. 30, 2017
Segment Reporting Information [Line Items] |
Segment Reporting Disclosure Other Information | A description of the operations included in the Companies’ primary operating segments is as follows:
Primary Operating Segment |  | Description of Operations |  | Dominion Energy |  | Virginia Power |  | Dominion Energy Gas
Power Delivery |  | Regulated electric distribution |  | X |  | X |  |
|  | Regulated electric transmission |  | X |  | X |  |
Power Generation |  | Regulated electric fleet |  | X |  | X |  |
|  | Merchant electric fleet |  | X |  |  |  |
Gas Infrastructure |  | Gas transmission and storage |  | X |  |  |  | X
|  | Gas distribution and storage |  | X |  |  |  | X
|  | Gas gathering and processing |  | X |  |  |  | X
|  | LNG import and storage |  | X |  |  |  |
|  | Nonregulated retail energy marketing |  | X |  |  |  |
Schedule of Segment Reporting Information, by Segment | The following table presents segment information pertaining to Dominion Energy’s operations:
|  | Power Delivery |  |  | Power Generation |  |  | Gas Infrastructure |  |  | Corporate and Other |  |  | Adjustments/ Eliminations |  |  | Consolidated Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  | $ | 530 |  |  | $ | 1,507 |  |  | $ | 589 |  |  | $ | 6 |  |  | $ | 181 |  |  | $ | 2,813 |
Intersegment revenue |  |  | 7 |  |  |  | 2 |  |  |  | 175 |  |  |  | 149 |  |  |  | (333 | ) |  |  | — |
Total operating revenue |  |  | 537 |  |  |  | 1,509 |  |  |  | 764 |  |  |  | 155 |  |  |  | (152 | ) |  |  | 2,813 |
Net income (loss) attributable to Dominion Energy |  |  | 127 |  |  |  | 240 |  |  |  | 163 |  |  |  | (140 | ) |  |  | — |  |  |  | 390 |
Three Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  | $ | 512 |  |  | $ | 1,564 |  |  | $ | 391 |  |  | $ | 3 |  |  | $ | 128 |  |  | $ | 2,598 |
Intersegment revenue |  |  | 6 |  |  |  | 2 |  |  |  | 124 |  |  |  | 133 |  |  |  | (265 | ) |  |  | — |
Total operating revenue |  |  | 518 |  |  |  | 1,566 |  |  |  | 515 |  |  |  | 136 |  |  |  | (137 | ) |  |  | 2,598 |
Net income attributable to Dominion Energy |  |  | 104 |  |  |  | 171 |  |  |  | 162 |  |  |  | 15 |  |  |  | — |  |  |  | 452 |
Six Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  | $ | 1,084 |  |  | $ | 3,160 |  |  | $ | 1,490 |  |  | $ | 9 |  |  | $ | 454 |  |  | $ | 6,197 |
Intersegment revenue |  |  | 12 |  |  |  | 5 |  |  |  | 441 |  |  |  | 301 |  |  |  | (759 | ) |  |  | — |
Total operating revenue |  |  | 1,096 |  |  |  | 3,165 |  |  |  | 1,931 |  |  |  | 310 |  |  |  | (305 | ) |  |  | 6,197 |
Net income (loss) attributable to Dominion Energy |  |  | 252 |  |  |  | 501 |  |  |  | 426 |  |  |  | (157 | ) |  |  | — |  |  |  | 1,022 |
Six Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  | $ | 1,068 |  |  | $ | 3,257 |  |  | $ | 876 |  |  | $ | 6 |  |  | $ | 312 |  |  | $ | 5,519 |
Intersegment revenue |  |  | 11 |  |  |  | 5 |  |  |  | 302 |  |  |  | 325 |  |  |  | (643 | ) |  |  | — |
Total operating revenue |  |  | 1,079 |  |  |  | 3,262 |  |  |  | 1,178 |  |  |  | 331 |  |  |  | (331 | ) |  |  | 5,519 |
Net income (loss) attributable to Dominion Energy |  |  | 224 |  |  |  | 416 |  |  |  | 348 |  |  |  | (12 | ) |  |  | — |  |  |  | 976 |
Virginia Electric and Power Company |
Segment Reporting Information [Line Items] |
Schedule of Segment Reporting Information, by Segment | The following table presents segment information pertaining to Virginia Power’s operations:
|  | Power Delivery |  |  | Power Generation |  |  | Corporate and Other |  |  | Consolidated Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 533 |  |  | $ | 1,214 |  |  | $ | — |  |  | $ | 1,747 |
Net income (loss) |  |  | 125 |  |  |  | 198 |  |  |  | (5 | ) |  |  | 318 |
Three Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 512 |  |  | $ | 1,264 |  |  | $ | — |  |  | $ | 1,776 |
Net income |  |  | 104 |  |  |  | 174 |  |  |  | 2 |  |  |  | 280 |
Six Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 1,090 |  |  | $ | 2,488 |  |  | $ | — |  |  | $ | 3,578 |
Net income |  |  | 250 |  |  |  | 421 |  |  |  | 3 |  |  |  | 674 |
Six Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 1,069 |  |  | $ | 2,597 |  |  | $ | — |  |  | $ | 3,666 |
Net income (loss) |  |  | 222 |  |  |  | 340 |  |  |  | (19 | ) |  |  | 543 |
Dominion Energy Gas Holdings, LLC |
Segment Reporting Information [Line Items] |
Schedule of Segment Reporting Information, by Segment | The following table presents segment information pertaining to Dominion Energy Gas' operations:
|  | Gas Infrastructure |  |  | Corporate and Other |  |  | Consolidated Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |
Three Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 422 |  |  | $ | — |  |  | $ | 422 |
Net income (loss) |  |  | 88 |  |  |  | (11 | ) |  |  | 77 |
Three Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 368 |  |  | $ | — |  |  | $ | 368 |
Net income (loss) |  |  | 108 |  |  |  | (3 | ) |  |  | 105 |
Six Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 912 |  |  | $ | — |  |  | $ | 912 |
Net income (loss) |  |  | 197 |  |  |  | (12 | ) |  |  | 185 |
Six Months Ended June 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 799 |  |  | $ | — |  |  | $ | 799 |
Net income (loss) |  |  | 211 |  |  |  | (8 | ) |  |  | 203 |

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