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Intangible Asset, Net (Tables) | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Components of intangible assets, net of accumulated amortization | Intangible assets, net of accumulated amortization, consisted of the following (in millions):
|  |  | December 31, 2021 |  | December 31, 2020
| Estimated Useful Lives (Years) |  | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Customer contracts and relationships (1) | 3 – 31 |  | $ | 2,445 |  |  | $ | (510) |  |  | $ | 1,935 |  |  | $ | 1,291 |  |  | $ | (519) |  |  | $ | 772 |
Other agreements | 1 – 70 |  | 36 |  |  | (11) |  |  | 25 |  |  | 63 |  |  | (30) |  |  | 33 |
Intangible assets (2) |  |  | $ | 2,481 |  |  | $ | (521) |  |  | $ | 1,960 |  |  | $ | 1,354 |  |  | $ | (549) |  |  | $ | 805 |
(1)The increase in intangible assets related to Customer contracts and relationships in 2021 is associated with the assets acquired in the formation of the Permian JV. See Note 7 for additional information. (2)We include rights-of-way, which are intangible assets, in our pipeline and related facilities amounts within property and equipment. See Note 6 for a discussion of property and equipment.
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):
2022 | $ | 240 |
2023 | $ | 232 |
2024 | $ | 220 |
2025 | $ | 207 |
2026 | $ | 187 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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