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Operating Revenue (Schedule of Operating Revenue) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Electric sales: |  |  |
Regulated |  | $ 1,766 | $ 1,842
Nonregulated |  | 427 | 389
Gas sales: |  |  |
Regulated |  | 448 | 65
Nonregulated |  | 144 | 118
Gas transportation and storage |  | 492 | 415
Other |  | 107 | 92
Total operating revenue |  | 3,384 | 2,921
Virginia Electric and Power Company |  |  |
Electric sales: |  |  |
Regulated |  | 1,766 | 1,842
Gas sales: |  |  |
Other |  | 65 | 48
Total operating revenue | [1] | 1,831 | 1,890
Dominion Gas Holdings, LLC |  |  |
Gas sales: |  |  |
Regulated |  | 32 | 29
Nonregulated |  | 2 | 1
Gas transportation and storage |  | 396 | 351
Other |  | 60 | 50
Total operating revenue | [2] | $ 490 | $ 431
[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=26872669&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=26872669&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=51678428&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=51678428&loc=d3e62136-109447 + Details
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