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Operating Revenue (Tables) | 12 Months Ended
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Dec. 31, 2017
Text Block [Abstract] |
Operating Revenue | The Companies’ operating revenue consists of the following:
Year Ended December 31, |  | 2017 |  |  | 2016 |  |  | 2015 |
(millions) |  |  |  |  |  |  |  |  |
Dominion Energy |  |  |  |  |  |  |  |  |  |  |  |
Electric sales: |  |  |  |  |  |  |  |  |  |  |  |
Regulated |  | $ | 7,383 |  |  | $ | 7,348 |  |  | $ | 7,482 |
Nonregulated |  |  | 1,429 |  |  |  | 1,519 |  |  |  | 1,488 |
Gas sales: |  |  |  |  |  |  |  |  |  |  |  |
Regulated |  |  | 1,067 |  |  |  | 500 |  |  |  | 218 |
Nonregulated |  |  | 457 |  |  |  | 354 |  |  |  | 471 |
Gas transportation and storage |  |  | 1,786 |  |  |  | 1,636 |  |  |  | 1,616 |
Other |  |  | 464 |  |  |  | 380 |  |  |  | 408 |
Total operating revenue |  | $ | 12,586 |  |  | $ | 11,737 |  |  | $ | 11,683 |
Virginia Power |  |  |  |  |  |  |  |  |  |  |  |
Regulated electric sales |  | $ | 7,383 |  |  | $ | 7,348 |  |  | $ | 7,482 |
Other |  |  | 173 |  |  |  | 240 |  |  |  | 140 |
Total operating revenue |  | $ | 7,556 |  |  | $ | 7,588 |  |  | $ | 7,622 |
Dominion Energy Gas |  |  |  |  |  |  |  |  |  |  |  |
Gas sales: |  |  |  |  |  |  |  |  |  |  |  |
Regulated |  | $ | 87 |  |  | $ | 119 |  |  | $ | 122 |
Nonregulated |  |  | 20 |  |  |  | 13 |  |  |  | 10 |
Gas transportation and storage |  |  | 1,435 |  |  |  | 1,307 |  |  |  | 1,366 |
NGL revenue |  |  | 91 |  |  |  | 62 |  |  |  | 93 |
Other |  |  | 181 |  |  |  | 137 |  |  |  | 125 |
Total operating revenue |  | $ | 1,814 |  |  | $ | 1,638 |  |  | $ | 1,716 |

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- Definition This element contains information about the components of the entity's operating revenue. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration