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Other Intangible Assets | 12 Months Ended
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Dec. 31, 2021
Intangible Assets, Gross (Excluding Goodwill) [Abstract] |
Other Intangible Assets | Other Intangible Assets Other intangible assets are presented in the following table.
December 31 |  |  | 2021 |  | 2020
(In millions) | Economic Useful Life |  | Gross Carrying Amount |  | Accumulated Amortization |  | Gross Carrying Amount |  | Accumulated Amortization
Finite-lived intangible assets: |  |  |  |  |  |  |  |  |
Trade name | 8 years |  | $ | 7 |  |  | 7 |  |  | $ | 7 |  |  | $ | 7 |
Distribution channel | 15 years |  | 11 |  |  | 7 |  |  | 11 |  |  | 6 |
Total finite-lived intangible assets |  |  | 18 |  |  | 14 |  |  | 18 |  |  | 13 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |
Syndicate capacity |  |  | 47 |  |  |  |  | 48 |  |  |
Agency force |  |  | 16 |  |  |  |  | 16 |  |  |
Total indefinite-lived intangible assets |  |  | 63 |  |  |  |  | 64 |  |  |
Total other intangible assets |  |  | $ | 81 |  |  | $ | 14 |  |  | $ | 82 |  |  | $ | 13 |
The Company's other intangible assets primarily relate to the purchase of Hardy, and the amortization of the finite-lived intangible assets is included in the Statement of Operations for the International segment. Amortization expense of $1 million was included in Other operating expenses for each of the years ended December 31, 2021, 2020 and 2019. The gross carrying amounts and accumulated amortization in the table above may change from period to period as a result of foreign currency translation. Estimated future annual amortization expense for other intangible assets is $1 million in each of the years 2022 through 2026.

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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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