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Operating Segments (Tables) | 12 Months Ended
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Dec. 31, 2019
Segment Reporting Information [Line Items] |
Schedule of Primary Operating Segments | The Companies are organized primarily on the basis of products and services sold in the U.S. 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
Dominion Energy Virginia |  | Regulated electric distribution |  | X |  | X |  |
|  | Regulated electric transmission |  | X |  | X |  |
|  | Regulated electric generation fleet (1) |  | X |  | X |  |
Gas Transmission & Storage |  | Regulated gas transmission and storage (2) |  | X |  |  |  | X
|  | LNG terminalling and storage |  | X |  |  |  | X
|  | Nonregulated retail energy marketing |  | X |  |  |  |
Gas Distribution |  | Regulated gas distribution and storage (3) |  | X |  |  |  |
Dominion Energy South Carolina |  | Regulated electric distribution |  | X |  |  |  |
|  | Regulated electric transmission |  | X |  |  |  |
|  | Regulated electric generation fleet |  | X |  |  |  |
|  | Regulated gas distribution and storage |  | X |  |  |  |
Contracted Generation |  | Merchant electric generation fleet |  | X |  |  |  |
(1) | Includes Virginia Power’s nonjurisdictional generation operations.
(2) | Includes gathering and processing activities.
(3) | Includes Wexpro’s natural gas development and production operations.
Schedule of Segment Reporting Information, by Segment | The following table presents segment information pertaining to Dominion Energy’s operations:
Year Ended December 31, |  | Dominion Energy Virginia |  |  | Gas Transmission & Storage |  |  | Gas Distribution |  |  | Dominion Energy South Carolina |  |  | Contracted Generation |  |  | Corporate and Other |  |  | Adjustments & Eliminations |  |  | Consolidated Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  |  | $8,170 |  |  |  | $3,074 |  |  |  | $2,367 |  |  |  | $2,948 |  |  |  | $1,135 |  |  |  | $(1,122 | ) |  |  | $ — |  |  |  | $16,572 |
Intersegment revenue |  |  | (13 | ) |  |  | 247 |  |  |  | 18 |  |  |  | 4 |  |  |  | 15 |  |  |  | 1,199 |  |  |  | (1,470 | ) |  |  | — |
Total operating revenue |  |  | 8,157 |  |  |  | 3,321 |  |  |  | 2,385 |  |  |  | 2,952 |  |  |  | 1,150 |  |  |  | 77 |  |  |  | (1,470 | ) |  |  | 16,572 |
Depreciation, depletion and amortization |  |  | 1,216 |  |  |  | 400 |  |  |  | 335 |  |  |  | 452 |  |  |  | 179 |  |  |  | 73 |  |  |  | — |  |  |  | 2,655 |
Equity in earnings of equity method investees |  |  | — |  |  |  | 161 |  |  |  | 2 |  |  |  | (4 | ) |  |  | (1 | ) |  |  | 10 |  |  |  | — |  |  |  | 168 |
Interest income |  |  | 11 |  |  |  | 211 |  |  |  | 4 |  |  |  | 9 |  |  |  | 92 |  |  |  | 160 |  |  |  | (386 | ) |  |  | 101 |
Interest and related charges |  |  | 530 |  |  |  | 405 |  |  |  | 116 |  |  |  | 242 |  |  |  | 98 |  |  |  | 768 |  |  |  | (386 | ) |  |  | 1,773 |
Income tax expense (benefit) |  |  | 482 |  |  |  | 262 |  |  |  | 114 |  |  |  | 163 |  |  |  | 20 |  |  |  | (690 | ) |  |  | — |  |  |  | 351 |
Net income (loss) attributable to Dominion Energy |  |  | 1,786 |  |  |  | 934 |  |  |  | 488 |  |  |  | 430 |  |  |  | 276 |  |  |  | (2,556 | ) |  |  | — |  |  |  | 1,358 |
Investment in equity method investees |  |  | — |  |  |  | 1,517 |  |  |  | 32 |  |  |  | — |  |  |  | 74 |  |  |  | 23 |  |  |  | — |  |  |  | 1,646 |
Capital expenditures |  |  | 3,002 |  |  |  | 431 |  |  |  | 848 |  |  |  | 562 |  |  |  | 367 |  |  |  | 111 |  |  |  | — |  |  |  | 5,321 |
Total assets (billions) |  |  | 43.7 |  |  |  | 20.9 |  |  |  | 16.0 |  |  |  | 15.8 |  |  |  | 10.2 |  |  |  | 6.9 |  |  |  | (9.7 | ) |  |  | 103.8 |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  |  | $8,401 |  |  |  | $1,867 |  |  |  | $1,769 |  |  |  | $ — |  |  |  | $1,487 |  |  |  | $ (249 | ) |  |  | $ 91 |  |  |  | $13,366 |
Intersegment revenue |  |  | (552 | ) |  |  | 723 |  |  |  | 16 |  |  |  | — |  |  |  | 8 |  |  |  | 723 |  |  |  | (918 | ) |  |  | — |
Total operating revenue |  |  | 7,849 |  |  |  | 2,590 |  |  |  | 1,785 |  |  |  | — |  |  |  | 1,495 |  |  |  | 474 |  |  |  | (827 | ) |  |  | 13,366 |
Depreciation, depletion and amortization |  |  | 1,158 |  |  |  | 348 |  |  |  | 263 |  |  |  | — |  |  |  | 213 |  |  |  | 18 |  |  |  | — |  |  |  | 2,000 |
Equity in earnings of equity method investees |  |  | — |  |  |  | 178 |  |  |  | — |  |  |  | — |  |  |  | 18 |  |  |  | 1 |  |  |  | — |  |  |  | 197 |
Interest income |  |  | 10 |  |  |  | 143 |  |  |  | — |  |  |  | — |  |  |  | 80 |  |  |  | 122 |  |  |  | (271 | ) |  |  | 84 |
Interest and related charges |  |  | 516 |  |  |  | 262 |  |  |  | 79 |  |  |  | — |  |  |  | 124 |  |  |  | 784 |  |  |  | (272 | ) |  |  | 1,493 |
Income tax expense (benefit) |  |  | 380 |  |  |  | 236 |  |  |  | 95 |  |  |  | — |  |  |  | 75 |  |  |  | (206 | ) |  |  | — |  |  |  | 580 |
Net income (loss) attributable to Dominion Energy |  |  | 1,596 |  |  |  | 844 |  |  |  | 373 |  |  |  | — |  |  |  | 245 |  |  |  | (611 | ) |  |  | — |  |  |  | 2,447 |
Investment in equity method investees |  |  | — |  |  |  | 1,159 |  |  |  | — |  |  |  | — |  |  |  | 82 |  |  |  | 37 |  |  |  | — |  |  |  | 1,278 |
Capital expenditures |  |  | 2,640 |  |  |  | 765 |  |  |  | 647 |  |  |  | — |  |  |  | 247 |  |  |  | 106 |  |  |  | — |  |  |  | 4,405 |
Total assets (billions) |  |  | 39.1 |  |  |  | 22.6 |  |  |  | 11.8 |  |  |  | — |  |  |  | 9.0 |  |  |  | 8.3 |  |  |  | (12.9 | ) |  |  | 77.9 |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  |  | $8,254 |  |  |  | $1,054 |  |  |  | $1,778 |  |  |  | $ — |  |  |  | $1,345 |  |  |  | $ (27 | ) |  |  | $ 182 |  |  |  | $12,586 |
Intersegment revenue |  |  | (688 | ) |  |  | 946 |  |  |  | 17 |  |  |  | — |  |  |  | 9 |  |  |  | 724 |  |  |  | (1,008 | ) |  |  | — |
Total operating revenue |  |  | 7,566 |  |  |  | 2,000 |  |  |  | 1,795 |  |  |  | — |  |  |  | 1,354 |  |  |  | 697 |  |  |  | (826 | ) |  |  | 12,586 |
Depreciation, depletion and amortization |  |  | 1,141 |  |  |  | 260 |  |  |  | 258 |  |  |  | — |  |  |  | 200 |  |  |  | 46 |  |  |  | — |  |  |  | 1,905 |
Equity in earnings of equity method investees |  |  | — |  |  |  | 158 |  |  |  | — |  |  |  | — |  |  |  | (171 | ) |  |  | (5 | ) |  |  | — |  |  |  | (18 | )
Interest income |  |  | 19 |  |  |  | 114 |  |  |  | — |  |  |  | — |  |  |  | 77 |  |  |  | 94 |  |  |  | (222 | ) |  |  | 82 |
Interest and related charges |  |  | 497 |  |  |  | 100 |  |  |  | 72 |  |  |  | — |  |  |  | 110 |  |  |  | 648 |  |  |  | (222 | ) |  |  | 1,205 |
Income tax expense (benefit) |  |  | 865 |  |  |  | 291 |  |  |  | 195 |  |  |  | — |  |  |  | (160 | ) |  |  | (1,221 | ) |  |  | — |  |  |  | (30 | )
Net income (loss) attributable to Dominion Energy |  |  | 1,466 |  |  |  | 552 |  |  |  | 351 |  |  |  | — |  |  |  | 253 |  |  |  | 377 |  |  |  | — |  |  |  | 2,999 |
Capital expenditures |  |  | 2,726 |  |  |  | 1,489 |  |  |  | 452 |  |  |  | — |  |  |  | 979 |  |  |  | 263 |  |  |  | — |  |  |  | 5,909 |
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:
Year Ended December 31, |  | Dominion Energy Virginia |  |  | Corporate and Other |  |  | Consolidated Total |
(millions) |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  |  | $8,137 |  |  |  | $ (29 | ) |  |  | $8,108 |
Depreciation and amortization |  |  | 1,215 |  |  |  | 8 |  |  |  | 1,223 |
Interest income |  |  | 11 |  |  |  | — |  |  |  | 11 |
Interest expense (benefit) and related charges |  |  | 529 |  |  |  | (5 | ) |  |  | 524 |
Income tax expense (benefit) |  |  | 481 |  |  |  | (217 | ) |  |  | 264 |
Net income (loss) |  |  | 1,783 |  |  |  | (634 | ) |  |  | 1,149 |
Capital expenditures |  |  | 2,981 |  |  |  | — |  |  |  | 2,981 |
Total assets (billions) |  |  | 41.4 |  |  |  | — |  |  |  | 41.4 |
2018 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  |  | $7,835 |  |  |  | $(216 | ) |  |  | $7,619 |
Depreciation and amortization |  |  | 1,157 |  |  |  | (25 | ) |  |  | 1,132 |
Interest income (expense) |  |  | 10 |  |  |  | — |  |  |  | 10 |
Interest expense (benefit) and related charges |  |  | 516 |  |  |  | (5 | ) |  |  | 511 |
Income tax expense (benefit) |  |  | 378 |  |  |  | (78 | ) |  |  | 300 |
Net income (loss) |  |  | 1,594 |  |  |  | (312 | ) |  |  | 1,282 |
Capital expenditures |  |  | 2,542 |  |  |  | — |  |  |  | 2,542 |
Total assets (billions) |  |  | 37.0 |  |  |  | (0.1 | ) |  |  | 36.9 |
2017 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  |  | $7,556 |  |  |  | $ — |  |  |  | $7,556 |
Depreciation and amortization |  |  | 1,141 |  |  |  | — |  |  |  | 1,141 |
Interest income (expense) |  |  | 19 |  |  |  | — |  |  |  | 19 |
Interest expense (benefit) and related charges |  |  | 497 |  |  |  | (3 | ) |  |  | 494 |
Income tax expense (benefit) |  |  | 868 |  |  |  | (94 | ) |  |  | 774 |
Net income |  |  | 1,466 |  |  |  | 74 |  |  |  | 1,540 |
Capital expenditures |  |  | 2,729 |  |  |  | — |  |  |  | 2,729 |
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:
Year Ended December 31, |  | Gas Transmission & Storage |  |  | Corporate and Other |  |  | Consolidated Total |
(millions) |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  |  | $2,186 |  |  |  | $ (17 | ) |  |  | $2,169 |
Depreciation and amortization |  |  | 367 |  |  |  | — |  |  |  | 367 |
Equity in earnings of equity method investees |  |  | 43 |  |  |  | — |  |  |  | 43 |
Interest income |  |  | 105 |  |  |  | — |  |  |  | 105 |
Interest and related charges |  |  | 309 |  |  |  | 2 |  |  |  | 311 |
Income tax expense (benefit) |  |  | 170 |  |  |  | (69 | ) |  |  | 101 |
Net Income from discontinued operations |  |  | — |  |  |  | 141 |  |  |  | 141 |
Net Income attributable to Dominion Energy Gas |  |  | 594 |  |  |  | 127 |  |  |  | 721 |
Investment in equity method investees |  |  | 312 |  |  |  | — |  |  |  | 312 |
Capital expenditures |  |  | 391 |  |  |  | 313 |  |  |  | 704 |
Total assets (billions) |  |  | 18.8 |  |  |  | — |  |  |  | 18.8 |
2018 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  |  | $1,996 |  |  |  | $ — |  |  |  | $1,996 |
Depreciation and amortization |  |  | 333 |  |  |  | — |  |  |  | 333 |
Equity in earnings of equity method investees |  |  | 54 |  |  |  | — |  |  |  | 54 |
Interest income |  |  | 26 |  |  |  | — |  |  |  | 26 |
Interest and related charges |  |  | 173 |  |  |  | 1 |  |  |  | 174 |
Income tax expense (benefit) |  |  | 226 |  |  |  | (102 | ) |  |  | 124 |
Net Income from discontinued operations |  |  | — |  |  |  | 24 |  |  |  | 24 |
Net Income (loss) attributable to Dominion Energy Gas |  |  | 571 |  |  |  | (90 | ) |  |  | 481 |
Investment in equity method investees |  |  | 339 |  |  |  | — |  |  |  | 339 |
Capital expenditures |  |  | 749 |  |  |  | 360 |  |  |  | 1,109 |
Total assets (billions) |  |  | 19.9 |  |  |  | 6.9 |  |  |  | 26.8 |
2017 |  |  |  |  |  |  |  |  |  |  |  |
Operating revenue |  |  | $1,523 |  |  |  | $ — |  |  |  | $1,523 |
Depreciation and amortization |  |  | 242 |  |  |  | — |  |  |  | 242 |
Equity in earnings of equity method investees |  |  | 47 |  |  |  | — |  |  |  | 47 |
Interest income |  |  | 4 |  |  |  | — |  |  |  | 4 |
Interest and related charges |  |  | 60 |  |  |  | — |  |  |  | 60 |
Income tax expense (benefit) |  |  | 189 |  |  |  | (254 | ) |  |  | (65 | )
Net Income from discontinued operations |  |  | — |  |  |  | 163 |  |  |  | 163 |
Net Income attributable to Dominion Energy Gas |  |  | 314 |  |  |  | 389 |  |  |  | 703 |
Capital expenditures |  |  | 1,459 |  |  |  | 356 |  |  |  | 1,815 |

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