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Operating Segments (Schedule of Segment Reporting Information, by Segment) (Detail) - USD ($) $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | $ 17,174 | $ 13,964 | $ 14,172
Depreciation, depletion and amortization |  |  |  | 2,830 | 2,478 | 2,332
Equity in earnings of equity method investees |  |  |  | 299 | 276 | 40
Interest income (expense) |  |  |  | 117 | 101 | 107
Interest and related charges (benefit) |  |  |  | 966 | 1,354 | 1,377
Income tax expense (benefit) |  | $ 336 | $ 173 | 68 | 425 | 83
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest | [1],[2] |  |  | 9 | 641 | (1,878)
Net income (loss) attributable to Dominion Energy |  |  |  | 994 | 3,288 | (401)
Investment in equity method affiliates | [3] |  | 2,932 | 3,012 | 2,932 |
Capital expenditures |  |  |  | 7,758 | 6,061 | 6,331
Total assets |  |  | 99,590 | 104,243 | 99,590 |
Operating Segments |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 17,174 | 13,959 | 14,197
Adjustments & Eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 0 | 60 | 48
Depreciation, depletion and amortization |  |  |  | 0 | 0 | 0
Equity in earnings of equity method investees |  |  |  | 0 | 0 | 0
Interest income (expense) |  |  |  | (76) | (26) | (88)
Interest and related charges (benefit) |  |  |  | (76) | (26) | (88)
Income tax expense (benefit) |  |  |  | 0 | 0 | 0
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  | 0 | 0 | 0
Net income (loss) attributable to Dominion Energy |  |  |  | 0 | 0 | 0
Investment in equity method affiliates | [3] |  | 0 | 0 | 0 |
Capital expenditures |  |  |  | 0 | 0 | 0
Total assets |  |  | (5,000) | (5,800) | (5,000) |
Intersegment revenue |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 0 | 5 | (25)
Intersegment revenue |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | (939) | (1,004) | (1,039)
Eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | (939) | (944) | (991)
Dominion Energy Virginia |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 9,653 | 7,999 | 7,787
Dominion Energy Virginia | Operating Segments |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 9,666 | 8,012 | 7,802
Depreciation, depletion and amortization |  |  |  | 1,454 | 1,299 | 1,247
Equity in earnings of equity method investees |  |  |  | 0 | 0 | 0
Interest income (expense) |  |  |  | 17 | 13 | 13
Interest and related charges (benefit) |  |  |  | 647 | 537 | 527
Income tax expense (benefit) |  |  |  | 408 | 462 | 496
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  | 0 | 0 | 0
Net income (loss) attributable to Dominion Energy |  |  |  | 2,008 | 1,919 | 1,891
Investment in equity method affiliates | [3] |  | 0 | 0 | 0 |
Capital expenditures |  |  |  | 5,206 | 3,762 | 3,406
Total assets |  |  | 50,300 | 55,400 | 50,300 |
Dominion Energy Virginia | Intersegment revenue |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | (13) | (13) | (15)
Gas Distribution |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 3,333 | 2,665 | 2,355
Gas Distribution | Operating Segments |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 3,331 | 2,660 | 2,345
Depreciation, depletion and amortization |  |  |  | 384 | 380 | 344
Equity in earnings of equity method investees |  |  |  | 3 | 0 | 0
Interest income (expense) |  |  |  | 9 | 6 | 6
Interest and related charges (benefit) |  |  |  | 119 | 86 | 76
Income tax expense (benefit) |  |  |  | 146 | 116 | 121
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  | 0 | 0 | 0
Net income (loss) attributable to Dominion Energy |  |  |  | 697 | 600 | 560
Investment in equity method affiliates | [3] |  | 106 | 146 | 106 |
Capital expenditures |  |  |  | 1,458 | 1,252 | 1,151
Total assets |  |  | 18,500 | 19,600 | 18,500 |
Gas Distribution | Intersegment revenue |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 2 | 5 | 10
Dominion Energy South Carolina |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 3,330 | 2,975 | 2,787
Dominion Energy South Carolina | Operating Segments |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 3,323 | 2,968 | 2,782
Depreciation, depletion and amortization |  |  |  | 507 | 486 | 474
Equity in earnings of equity method investees |  |  |  | 0 | (3) | (1)
Interest income (expense) |  |  |  | 6 | 10 | 12
Interest and related charges (benefit) |  |  |  | 220 | 206 | 219
Income tax expense (benefit) |  |  |  | 132 | 125 | 107
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  | 0 | 0 | 0
Net income (loss) attributable to Dominion Energy |  |  |  | 505 | 437 | 419
Investment in equity method affiliates | [3] |  | 0 | 0 | 0 |
Capital expenditures |  |  |  | 708 | 694 | 700
Total assets |  |  | 16,400 | 17,200 | 16,400 |
Dominion Energy South Carolina | Intersegment revenue |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 7 | 7 | 5
Contracted Assets |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 908 | 1,085 | 1,071
Contracted Assets | Operating Segments |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 890 | 1,018 | 1,020
Depreciation, depletion and amortization |  |  |  | 123 | 162 | 182
Equity in earnings of equity method investees |  |  |  | 277 | 259 | 35
Interest income (expense) |  |  |  | 75 | 81 | 91
Interest and related charges (benefit) |  |  |  | 95 | 52 | 75
Income tax expense (benefit) |  |  |  | 106 | 112 | (16)
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  | 0 | 0 | 167
Net income (loss) attributable to Dominion Energy |  |  |  | 335 | 431 | 402
Investment in equity method affiliates | [3] |  | 2,738 | 2,673 | 2,738 |
Capital expenditures |  |  |  | 342 | 277 | 649
Total assets |  |  | 12,300 | 9,700 | 12,300 |
Contracted Assets | Intersegment revenue |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 18 | 67 | 51
Corporate and Other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | 889 | 184 | 1,163
Corporate and Other | Operating Segments |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | (36) | (759) | 200
Depreciation, depletion and amortization |  |  |  | 362 | 151 | 85
Equity in earnings of equity method investees |  |  |  | 19 | 20 | 6
Interest income (expense) |  |  |  | 86 | 17 | 73
Interest and related charges (benefit) |  |  |  | (39) | 499 | 568
Income tax expense (benefit) |  |  |  | (724) | (390) | (625)
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  | 9 | 641 | (2,045)
Net income (loss) attributable to Dominion Energy |  |  |  | (2,551) | (99) | (3,673)
Investment in equity method affiliates | [3] |  | 88 | 193 | 88 |
Capital expenditures |  |  |  | 44 | 76 | 425
Total assets |  |  | $ 7,100 | 8,100 | 7,100 |
Corporate and Other | Intersegment revenue |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Operating Revenue |  |  |  | $ 925 | $ 943 | $ 963
[1] | Includes income tax expense (benefit) of $8 million, $188 million and $(204) million for the years ended December 31, 2022, 2021 and 2020, respectively.
[2] | See Note 9 for amounts attributable to related parties.
[3] | Excludes liability to Atlantic Coast Pipeline.

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