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Other Intangible Assets | 12 Months Ended
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Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract] |
Other Intangible Assets | NOTE 10. Other Intangible Assets: Other intangible assets are summarized as follows:
| December 31, |
| 2021 |  |  | 2020 |
| (in millions) |
Finite-lived intangible assets: |  |  |  |  |  |  |
Customer relationships | $ | 203 |  |  | $ | 173 |
Noncompete agreements |  | 49 |  |  |  | 38 |
Trademarks |  | 32 |  |  |  | 24 |
Internal-use software licenses |  | 21 |  |  |  | 21 |
Patents |  | 3 |  |  |  | 3 |
|  | 308 |  |  |  | 259 |
Accumulated amortization |  | (107 | ) |  |  | (82 | )
|  | 201 |  |  |  | 177 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |
Licenses |  | 17 |  |  |  | 17 |
| $ | 218 |  |  | $ | 194 |
Amortization expense for finite-lived intangible assets was $51 million, $43 million and $28 million for the years ended December 31, 2021, 2020 and 2019, respectively. Estimated amortization expense for finite-lived intangible assets for the next five years is summarized as follows:
Year |  | (in millions) |
2022 | $ | 53 |
2023 | $ | 45 |
2024 | $ | 36 |
2025 | $ | 28 |
2026 | $ | 23 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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