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Goodwill and Intangible Assets (Goodwill) (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Goodwill [Roll Forward] |  |  |
Goodwill, Beginning Balance | [1] | $ 7,405 | $ 7,381
Acquisition | [2] |  | 24
Sale of Hope | [2] | (110) |
Goodwill, Ending Balance | [1] | 7,295 | 7,405
Operating Segments | Dominion Energy Virginia |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, Beginning Balance | [1] | 2,106 | 2,106
Goodwill, Ending Balance | [1] | 2,106 | 2,106
Operating Segments | Gas Distribution |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, Beginning Balance | [1] | 3,512 | 3,512
Sale of Hope | [2] | (110) |
Goodwill, Ending Balance | [1] | 3,402 | 3,512
Operating Segments | Dominion Energy South Carolina |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, Beginning Balance | [1] | 1,521 | 1,521
Goodwill, Ending Balance | [1] | 1,521 | 1,521
Operating Segments | Contracted Assets |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, Beginning Balance | [1] | 266 | 242
Acquisition | [2] |  | 24
Goodwill, Ending Balance | [1] | $ 266 | $ 266
[1] | Goodwill amounts do not contain any accumulated impairment losses.
[2] | See Note 3 for more information.

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