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Goodwill and Intangible Assets | 12 Months Ended
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Dec. 31, 2022
Goodwill And Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | NOTE 11. GOODWILL AND INTANGIBLE ASSETS Goodwill The changes in Dominion Energy’s carrying amount and segment allocation of goodwill are presented below:
|  | Dominion Energy Virginia |  |  | Gas Distribution |  |  | Dominion Energy South Carolina |  |  | Contracted Assets |  |  | Corporate and Other |  |  | Total |
(millions) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dominion Energy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2020(1) |  | $ | 2,106 |  |  | $ | 3,512 |  |  | $ | 1,521 |  |  | $ | 242 |  |  | $ | — |  |  | $ | 7,381 |
Acquisition of Birdseye(2) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 24 |  |  |  | — |  |  |  | 24 |
Balance at December 31, 2021(1) |  | $ | 2,106 |  |  | $ | 3,512 |  |  | $ | 1,521 |  |  | $ | 266 |  |  | $ | — |  |  | $ | 7,405 |
Sale of Hope(2) |  |  | — |  |  |  | (110 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (110 | )
Balance at December 31, 2022(1) |  | $ | 2,106 |  |  | $ | 3,402 |  |  | $ | 1,521 |  |  | $ | 266 |  |  | $ | — |  |  | $ | 7,295 |
(1) Goodwill amounts do not contain any accumulated impairment losses. (2) See Note 3 for more information. Other Intangible Assets The Companies’ other intangible assets are subject to amortization over their estimated useful lives. Dominion Energy’s amortization expense for intangible assets was $115 million, $79 million and $69 million for the years ended December 31, 2022, 2021 and 2020, respectively. In 2022, Dominion Energy acquired $488 million of intangible assets, primarily representing RGGI allowances and software, with an estimated weighted-average amortization period of approximately 3 years. Amortization expense for Virginia Power’s intangible assets was $67 million, $31 million and $28 million for the years ended December 31, 2022, 2021 and 2020, respectively. In 2022, Virginia Power acquired $430 million of intangible assets, primarily representing RGGI allowances and software, with an estimated weighted-average amortization period of 2 years. 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) |  | $ | 1,854 |  |  | $ | 986 |  |  | $ | 1,459 |  |  | $ | 675 |
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 for these intangible assets is estimated to be as follows:
|  |  | 2023 |  |  | 2024 |  |  | 2025 |  |  | 2026 |  |  | 2027 |
(millions) |  |  |  |  |  |  |  |  |  |  |
Dominion Energy |  | $ | 74 |  | $ | 67 |  | $ | 59 |  | $ | 47 |  | $ | 29 |
Virginia Power |  | $ | 33 |  | $ | 30 |  | $ | 26 |  | $ | 20 |  | $ | 10 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI https://asc.fasb.org/topic&trid=2144416 + Details
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