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Intangible Assets | 3 Months Ended
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Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Intangible Assets Goodwill is presumed to have an indefinite useful life and is tested for impairment at the reporting unit level, at least once a year. There was no change in goodwill during the three months ended March 31, 2023. As a result of the Signature Transaction, the Company recorded $462 million of core deposit intangible and other intangible assets that are amortizable. At March 31, 2023, intangible assets consisted of the following:
| March 31, 2023 |  | December 31, 2022
(in millions) | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Value
Core deposit intangible | $ | 700 |  |  | $ | (17) |  |  | $ | 683 |  |  | $ | 250 |  |  | $ | (4) |  |  | $ | 246 |
Other intangible assets | 56 |  | (5) |  | 51 |  | 42 |  | (1) |  |  | 41
Total other intangible assets | $ | 756 |  |  | $ | (22) |  |  | $ | 734 |  |  | $ | 292 |  |  | $ | (5) |  |  | $ | 287 |
The estimated amortization expense of CDI and other intangible assets for the next five years is as follows:
(in millions) | Amortization Expense
2023 | $ | 88 |
2024 | 108 |
2025 | 88 |
2026 | 79 |
2027 | 71 |
Total | $ | 434 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -URI https://asc.fasb.org/subtopic&trid=2144471 + Details
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