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Intangible Asset, Net (Tables) | 12 Months Ended
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Dec. 31, 2024
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, 2024 |  | December 31, 2023
| Estimated Useful Lives (Years) |  | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Customer contracts and relationships | 1 – 29 |  | $ | 2,767 |  |  | $ | (1,105) |  |  | $ | 1,662 |  |  | $ | 2,789 |  |  | $ | (932) |  |  | $ | 1,857 |
Other agreements | 15 – 70 |  | 28 |  |  | (13) |  |  | 15 |  |  | 30 |  |  | (12) |  |  | 18 |
Intangible assets (1) |  |  | $ | 2,795 |  |  | $ | (1,118) |  |  | $ | 1,677 |  |  | $ | 2,819 |  |  | $ | (944) |  |  | $ | 1,875 |
(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):
2025 | $ | 255 |
2026 | $ | 218 |
2027 | $ | 194 |
2028 | $ | 172 |
2029 | $ | 154 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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