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Operating Revenue (Schedule of Operating Revenue) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Electric sales: |  |  |  |  |
Regulated |  | $ 1,716 | $ 1,718 | $ 3,482 | $ 3,560
Nonregulated |  | 307 | 335 | 734 | 724
Gas sales: |  |  |  |  |
Regulated |  | 151 | 26 | 599 | 91
Nonregulated |  | 110 | 54 | 254 | 172
Gas transportation and storage |  | 430 | 369 | 922 | 784
Other |  | 99 | 96 | 206 | 188
Total operating revenue |  | 2,813 | 2,598 | 6,197 | 5,519
Virginia Electric and Power Company |  |  |  |  |
Electric sales: |  |  |  |  |
Regulated |  | 1,716 | 1,718 | 3,482 | 3,560
Gas sales: |  |  |  |  |
Other |  | 31 | 58 | 96 | 106
Total operating revenue | [1] | 1,747 | 1,776 | 3,578 | 3,666
Dominion Energy Gas Holdings, LLC |  |  |  |  |
Gas sales: |  |  |  |  |
Regulated |  | 15 | 12 | 47 | 41
Nonregulated |  | 8 | 6 | 10 | 7
Gas transportation and storage |  | 342 | 301 | 738 | 652
Other |  | 57 | 49 | 117 | 99
Total operating revenue | [2] | $ 422 | $ 368 | $ 912 | $ 799
[1] | See Note 17 for amounts attributable to affiliates.
[2] | See Note 17 for amounts attributable to related parties.

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- Definition Revenue derived from the regulated (by a federal, state, or local government or agency) generation, transmission and distribution of electricity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(b)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Revenue related to midstream and downstream gas activities. May include the following: gathering from wells, processing to remove impurities, storage, transmission, and the sale of natural gas and related products. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62246-109447 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447 + Details
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- Definition Amount, after sales adjustments, returns, allowances, and discounts, of revenue classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a),(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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