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Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill | Goodwill and other intangible assets consisted of the following:
| June 30, 2023 |  | December 31, 2022
| (Dollars in millions)
Goodwill | $ | 9,360 |  |  | 9,360 |
Other intangible assets, less accumulated amortization of $1,940 and $1,924 | $ | 120 |  |  | 138 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | We estimate that amortization expense for intangible assets for the years ending December 31, 2023 through 2027 will be as follows:
| (Dollars in millions)
2023 (remaining six months) | $ | 32 |
2024 | 32 |
2025 | 16 |
2026 | 10 |
2027 | 7 |

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