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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2022
Goodwill And Intangible Assets Disclosure [Abstract] |
Segment allocation of goodwill | The changes in Dominion Energy’s carrying amount and segment allocation of goodwill are presented below:
|  | Dominion Energy Virginia |  |  | Dominion Energy South Carolina |  |  | Contracted Energy |  |  | Corporate and Other |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2020(1) |  | $ | 2,106 |  |  | $ | 1,521 |  |  | $ | 492 |  |  | $ | 110 |  |  | $ | 4,229 |
Acquisition of Birdseye(2) |  |  | — |  |  |  | — |  |  |  | 24 |  |  |  | — |  |  |  | 24 |
Balance at December 31, 2021(1) |  | $ | 2,106 |  |  | $ | 1,521 |  |  | $ | 516 |  |  | $ | 110 |  |  | $ | 4,253 |
Sale of Hope(2) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (110 | ) |  |  | (110 | )
Balance at December 31, 2022(1) |  | $ | 2,106 |  |  | $ | 1,521 |  |  | $ | 516 |  |  | $ | — |  |  | $ | 4,143 |
(1) Goodwill amounts do not contain any accumulated impairment losses. (2) See Note 3 for more information.
Components of intangible assets | The components of intangible assets are as follows:
|  | 2022 |  |  | 2021 |
At December 31, |  | Gross Carrying Amount |  |  | Accumulated Amortization |  |  | Gross Carrying Amount |  |  | Accumulated Amortization |
(millions) |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy |  |  |  |  |  |  |  |  |  |  |  |
Software, licenses and other(1) |  | $ | 1,723 |  |  | $ | 927 |  |  | $ | 1,324 |  |  | $ | 612 |
Virginia Power |  |  |  |  |  |  |  |  |  |  |  |
Software, licenses and other(1) |  | $ | 1,113 |  |  | $ | 577 |  |  | $ | 685 |  |  | $ | 290 |
(1) Includes $253 million and $158 million of RGGI allowances purchased and consumed in 2022 and 2021, respectively, with deferral to a regulatory asset.
Annual amortization expense of intangible assets | Annual amortization expense for these intangible assets is estimated to be as follows:
|  |  | 2023 |  |  | 2024 |  |  | 2025 |  |  | 2026 |  |  | 2027 |
(millions) |  |  |  |  |  |  |  |  |  |  |
Dominion Energy |  | $ | 68 |  | $ | 61 |  | $ | 54 |  | $ | 43 |  | $ | 25 |
Virginia Power |  | $ | 33 |  | $ | 30 |  | $ | 26 |  | $ | 20 |  | $ | 10 |

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