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Wireless Licenses, Goodwill and Other Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Carrying Amount of Wireless Licenses | The carrying amounts of our Wireless licenses are as follows:
| At March 31, | At December 31,
(dollars in millions) | 2023 | 2022
Wireless licenses | $ | 150,485 |  | $ | 149,796 |
Changes in Carrying Amount of Goodwill | Changes in the carrying amount of Goodwill are as follows:
(dollars in millions) | Consumer |  | Business |  | Other |  | Total
Balance at January 1, 2023 | $ | 21,142 |  |  | $ | 7,502 |  |  | $ | 27 |  |  | $ | 28,671 |
Reclassifications, adjustments and other | — |  |  | 3 |  |  | — |  |  | 3 |
Balance at March 31, 2023 | $ | 21,142 |  |  | $ | 7,505 |  |  | $ | 27 |  |  | $ | 28,674 |
Composition of Other Intangible Assets, Net | The following table displays the composition of Other intangible assets, net as well as the respective amortization periods:
| At March 31, 2023 |  | At December 31, 2022
(dollars in millions) | Gross Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Customer lists (5 to 13 years) | $ | 4,335 |  |  | $ | (1,776) |  |  | $ | 2,559 |  |  | $ | 4,335 |  |  | $ | (1,646) |  |  | $ | 2,689 |
Non-network internal-use software (7 years) | 23,838 |  |  | (16,835) |  |  | 7,003 |  |  | 23,421 |  |  | (16,397) |  |  | 7,024 |
Other (4 to 25 years) | 2,817 |  |  | (1,133) |  |  | 1,684 |  |  | 2,806 |  |  | (1,058) |  |  | 1,748 |
Total | $ | 30,990 |  |  | $ | (19,744) |  |  | $ | 11,246 |  |  | $ | 30,562 |  |  | $ | (19,101) |  |  | $ | 11,461 |
Amortization Expense for Other Intangible Assets | The amortization expense for Other intangible assets was as follows:
|  |  | Three Months Ended
(dollars in millions) |  |  | March 31,
2023 |  |  | $ | 647 |
2022 |  |  | 635 |
Estimated Future Amortization Expense for Other Intangible Assets | The estimated future amortization expense for Other intangible assets for the remainder of the current year and next 5 years is as follows:
Years | (dollars in millions)
Remainder of 2023 | $ | 1,903 |
2024 | 2,317 |
2025 | 2,121 |
2026 | 1,879 |
2027 | 1,318 |
2028 | 902 |

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