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Operating Segments (Tables) | 6 Months Ended
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Jun. 30, 2018
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 terminalling 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, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  | $ | 528 |  |  | $ | 1,635 |  |  | $ | 914 |  |  | $ | (3 | ) |  | $ | 14 |  |  | $ | 3,088 |
Intersegment revenue |  |  | 6 |  |  |  | 3 |  |  |  | 8 |  |  |  | 170 |  |  |  | (187 | ) |  |  | — |
Total operating revenue |  |  | 534 |  |  |  | 1,638 |  |  |  | 922 |  |  |  | 167 |  |  |  | (173 | ) |  |  | 3,088 |
Net income (loss) attributable to Dominion Energy |  |  | 145 |  |  |  | 276 |  |  |  | 249 |  |  |  | (221 | ) |  |  | — |  |  |  | 449 |
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 |
Six Months Ended June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  | $ | 1,091 |  |  | $ | 3,495 |  |  | $ | 2,136 |  |  | $ | (210 | ) |  | $ | 42 |  |  | $ | 6,554 |
Intersegment revenue |  |  | 12 |  |  |  | 5 |  |  |  | 14 |  |  |  | 345 |  |  |  | (376 | ) |  |  | — |
Total operating revenue |  |  | 1,103 |  |  |  | 3,500 |  |  |  | 2,150 |  |  |  | 135 |  |  |  | (334 | ) |  |  | 6,554 |
Net income (loss) attributable to Dominion Energy |  |  | 301 |  |  |  | 624 |  |  |  | 576 |  |  |  | (549 | ) |  |  | — |  |  |  | 952 |
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 |
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, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 528 |  |  | $ | 1,301 |  |  | $ | — |  |  | $ | 1,829 |
Net income (loss) |  |  | 145 |  |  |  | 227 |  |  |  | (33 | ) |  |  | 339 |
Three Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 533 |  |  | $ | 1,214 |  |  | $ | — |  |  | $ | 1,747 |
Net income (loss) |  |  | 125 |  |  |  | 198 |  |  |  | (5 | ) |  |  | 318 |
Six Months Ended June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 1,091 |  |  | $ | 2,701 |  |  | $ | (215 | ) |  | $ | 3,577 |
Net income (loss) |  |  | 299 |  |  |  | 449 |  |  |  | (225 | ) |  |  | 523 |
Six Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 1,090 |  |  | $ | 2,488 |  |  | $ | — |  |  | $ | 3,578 |
Net income |  |  | 250 |  |  |  | 421 |  |  |  | 3 |  |  |  | 674 |
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, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 459 |  |  | $ | — |  |  | $ | 459 |
Net income (loss) |  |  | 108 |  |  |  | (93 | ) |  |  | 15 |
Three Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 422 |  |  | $ | — |  |  | $ | 422 |
Net income (loss) |  |  | 88 |  |  |  | (11 | ) |  |  | 77 |
Six Months Ended June 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 985 |  |  | $ | — |  |  | $ | 985 |
Net income (loss) |  |  | 275 |  |  |  | (94 | ) |  |  | 181 |
Six Months Ended June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  | $ | 912 |  |  | $ | — |  |  | $ | 912 |
Net income (loss) |  |  | 197 |  |  |  | (12 | ) |  |  | 185 |

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