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Operating Segments (Schedule of Segment Reporting Information, by Segment) (Detail) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  | $ 3,534 | $ 3,810 | $ 3,166 | $ 3,883 | $ 3,807 | $ 3,961 | $ 3,058 | $ 3,112 | $ 14,393 |  | $ 13,938 |  | $ 11,419 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 2,580 |  | 2,442 |  | 2,117 |
Equity in earnings of equity method investees |  |  |  |  |  |  |  |  |  |  | (26) |  | 21 |  | 15 |
Interest income (expense) |  |  |  |  |  |  |  |  |  |  | 107 |  | 109 |  | 95 |
Interest and related charges (benefit) |  |  |  |  |  |  |  |  |  |  | 1,674 |  | 1,002 |  | 1,255 |
Income tax expense (benefit) |  | $ 173 |  |  |  |  |  |  |  |  | 575 |  | 113 |  | (181) |
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  | (71) | (541) | 168 | 281 | 122 | 150 | 212 | 410 | (163) | [1],[2] | 894 | [1],[2] | 1,358 | [1],[2]
Net income (loss) attributable to Dominion Energy |  |  | 273 | $ 157 | $ 583 | $ 981 | 344 | $ 735 | $ (447) | $ 689 | 1,994 |  | 1,321 |  | 3,399 |
Investment in equity method affiliates | [3] |  | 268 |  |  |  | 295 |  |  |  | 268 |  | 295 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 10,235 |  | 7,758 |  | 6,061 |
Total assets |  |  | 109,032 |  |  |  | 104,795 |  |  |  | 109,032 |  | 104,795 |  |  |
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  |  |  |  |  |  |  |  |  |  | 14,393 |  | 13,938 |  | 11,419 |
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |  | 894 |  |  |
Adjustments & Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue from external customers |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 61 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Equity in earnings of equity method investees |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Interest income (expense) |  |  |  |  |  |  |  |  |  |  | (206) |  | (50) |  | (19) |
Interest and related charges (benefit) |  |  |  |  |  |  |  |  |  |  | (206) |  | (50) |  | (19) |
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 |  | 0 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Total assets |  |  | (4,100) |  |  |  | (5,500) |  |  |  | (4,100) |  | (5,500) |  |  |
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | (959) |  | (859) |  | (901) |
Eliminations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | (959) |  | (859) |  | (840) |
Dominion Energy Virginia | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | 9,573 |  | 9,643 |  | 7,976 |
Total revenue from external customers |  |  |  |  |  |  |  |  |  |  | 9,575 |  | 9,658 |  | 7,990 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 1,622 |  | 1,452 |  | 1,296 |
Equity in earnings of equity method investees |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Interest income (expense) |  |  |  |  |  |  |  |  |  |  | 15 |  | 17 |  | 11 |
Interest and related charges (benefit) |  |  |  |  |  |  |  |  |  |  | 772 |  | 645 |  | 535 |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 471 |  | 514 |  | 516 |
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Net income (loss) attributable to Dominion Energy |  |  |  |  |  |  |  |  |  |  | 1,684 |  | 1,905 |  | 1,863 |
Investment in equity method affiliates | [3] |  | 0 |  |  |  | 0 |  |  |  | 0 |  | 0 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 7,196 |  | 5,187 |  | 3,756 |
Total assets |  |  | 60,700 |  |  |  | 55,300 |  |  |  | 60,700 |  | 55,300 |  |  |
Dominion Energy Virginia | Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | (2) |  | (15) |  | (14) |
Dominion Energy South Carolina | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | 3,375 |  | 3,330 |  | 2,975 |
Total revenue from external customers |  |  |  |  |  |  |  |  |  |  | 3,369 |  | 3,323 |  | 2,968 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 531 |  | 507 |  | 486 |
Equity in earnings of equity method investees |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | (3) |
Interest income (expense) |  |  |  |  |  |  |  |  |  |  | 6 |  | 6 |  | 10 |
Interest and related charges (benefit) |  |  |  |  |  |  |  |  |  |  | 249 |  | 220 |  | 206 |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 79 |  | 132 |  | 125 |
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Net income (loss) attributable to Dominion Energy |  |  |  |  |  |  |  |  |  |  | 377 |  | 505 |  | 437 |
Investment in equity method affiliates | [3] |  | 0 |  |  |  | 0 |  |  |  | 0 |  | 0 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 957 |  | 708 |  | 694 |
Total assets |  |  | 17,300 |  |  |  | 17,200 |  |  |  | 17,300 |  | 17,200 |  |  |
Dominion Energy South Carolina | Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | 6 |  | 7 |  | 7 |
Contracted Energy | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | 851 |  | 902 |  | 1,084 |
Total revenue from external customers |  |  |  |  |  |  |  |  |  |  | 835 |  | 884 |  | 1,017 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 105 |  | 123 |  | 176 |
Equity in earnings of equity method investees |  |  |  |  |  |  |  |  |  |  | (34) |  | 2 |  | (2) |
Interest income (expense) |  |  |  |  |  |  |  |  |  |  | 96 |  | 75 |  | 81 |
Interest and related charges (benefit) |  |  |  |  |  |  |  |  |  |  | 44 |  | 18 |  | 44 |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 15 |  | 55 |  | 47 |
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  | 0 |  | 0 |  | 0 |
Net income (loss) attributable to Dominion Energy |  |  |  |  |  |  |  |  |  |  | 99 |  | 188 |  | 226 |
Investment in equity method affiliates | [3] |  | 80 |  |  |  | 103 |  |  |  | 80 |  | 103 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 740 |  | 683 |  | 420 |
Total assets |  |  | 9,100 |  |  |  | 8,200 |  |  |  | 9,100 |  | 8,200 |  |  |
Contracted Energy | Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | 16 |  | 18 |  | 67 |
Corporate and Other | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | 1,553 |  | 922 |  | 224 |
Total revenue from external customers |  |  |  |  |  |  |  |  |  |  | 614 |  | 73 |  | (617) |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 322 |  | 360 |  | 159 |
Equity in earnings of equity method investees |  |  |  |  |  |  |  |  |  |  | 8 |  | 19 |  | 20 |
Interest income (expense) |  |  |  |  |  |  |  |  |  |  | 196 |  | 61 |  | 12 |
Interest and related charges (benefit) |  |  |  |  |  |  |  |  |  |  | 815 |  | 169 |  | 489 |
Income tax expense (benefit) |  |  |  |  |  |  |  |  |  |  | 10 |  | (588) |  | (869) |
Net Income (Loss) From Discontinued Operations Including Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  | (163) |  | 894 |  | 1,358 |
Net income (loss) attributable to Dominion Energy |  |  |  |  |  |  |  |  |  |  | (166) |  | (1,277) |  | 873 |
Investment in equity method affiliates | [3] |  | 188 |  |  |  | 192 |  |  |  | 188 |  | 192 |  |  |
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 1,342 |  | 1,180 |  | 1,191 |
Total assets |  |  | $ 26,000 |  |  |  | $ 29,600 |  |  |  | 26,000 |  | 29,600 |  |  |
Corporate and Other | Intersegment revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Revenue |  |  |  |  |  |  |  |  |  |  | $ 939 |  | $ 849 |  | $ 841 |
[1] | Includes income tax expense of $1.3 billion, $197 million and $374 million for the years ended December 31, 2023, 2022 and 2021, respectively.
[2] | See Note 9 for amounts attributable to related parties.
[3] | Excludes liability to Atlantic Coast Pipeline.

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