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Wireless Licenses, Goodwill and Other Intangible Assets (Tables) | 6 Months Ended
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Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Carrying Amount of Wireless Licenses | The carrying amounts of our Wireless licenses are as follows:
| At June 30, | At December 31,
(dollars in millions) | 2023 | 2022
Wireless licenses | $ | 151,337 |  | $ | 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 (1) | — |  |  | 3 |  |  | (27) |  |  | (24) |
Balance at June 30, 2023 | $ | 21,142 |  |  | $ | 7,505 |  |  | $ | — |  |  | $ | 28,647 |
(1) Includes goodwill impairment charges of $27 million, related to non-strategic businesses presented within Other, recorded in Selling, general and administrative expense in our condensed consolidated statements of income for the three and six months ended June 30, 2023.
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 June 30, 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 |  |  | $ | (1,907) |  |  | $ | 2,428 |  |  | $ | 4,335 |  |  | $ | (1,646) |  |  | $ | 2,689 |
Non-network internal-use software (7 years) | 24,247 |  |  | (17,210) |  |  | 7,037 |  |  | 23,421 |  |  | (16,397) |  |  | 7,024 |
Other (4 to 25 years) | 2,839 |  |  | (1,207) |  |  | 1,632 |  |  | 2,806 |  |  | (1,058) |  |  | 1,748 |
Total | $ | 31,421 |  |  | $ | (20,324) |  |  | $ | 11,097 |  |  | $ | 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 |  | Six Months Ended
(dollars in millions) | June 30, |  | June 30,
2023 | $ | 653 |  |  | $ | 1,300 |
2022 | 651 |  |  | 1,286 |
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 | $ | 1,299 |
2024 | 2,398 |
2025 | 2,198 |
2026 | 1,951 |
2027 | 1,392 |
2028 | 979 |

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