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Intangible Asset, Net (Tables) | 12 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Components of Intangible Assets, Net of Accumulated Amortization | Intangible assets, net of accumulated amortization, consisted of the following (in millions):
|  |  | December 31, 2023 |  | December 31, 2022
| Estimated Useful Lives (Years) |  | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Customer contracts and relationships | 1 – 29 |  | $ | 2,789 |  |  | $ | (932) |  |  | $ | 1,857 |  |  | $ | 2,817 |  |  | $ | (695) |  |  | $ | 2,122 |
Other agreements | 15 – 70 |  | 30 |  |  | (12) |  |  | 18 |  |  | 35 |  |  | (12) |  |  | 23 |
Intangible assets (1) |  |  | $ | 2,819 |  |  | $ | (944) |  |  | $ | 1,875 |  |  | $ | 2,852 |  |  | $ | (707) |  |  | $ | 2,145 |
(1)We include rights-of-way, which are intangible assets, within property and equipment. See Note 6 for a discussion of property and equipment.
Schedule of Estimated Amortization Expense Related to Finite-lived Intangible Assets for the next Five Years | We estimate that our amortization expense related to finite-lived intangible assets for the next five years will be as follows (in millions):
2024 | $ | 272 |
2025 | $ | 249 |
2026 | $ | 210 |
2027 | $ | 187 |
2028 | $ | 165 |

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