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Other Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Intangible Assets, Gross (Excluding Goodwill) [Abstract] |
Schedule of Other Intangible Assets | Other intangible assets are presented in the following table.
December 31 |  |  | 2017 |  | 2016
(In millions) | Economic Useful Life |  | Carrying Amount |  | Accumulated Amortization |  | Carrying Amount |  | Accumulated Amortization
Finite-lived intangible assets: |  |  |  |  |  |  |  |  |
Trade name | 8 years |  | $ | 7 |  |  | $ | 5 |  |  | $ | 6 |  |  | $ | 3 |
Distribution channel | 15 years |  | 11 |  |  | 4 |  |  | 10 |  |  | 3 |
Total finite-lived intangible assets |  |  | 18 |  |  | 9 |  |  | 16 |  |  | 6 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |
Syndicate capacity |  |  | 47 |  |  |  |  | 43 |  |  |
Agency force |  |  | 16 |  |  |  |  | 16 |  |  |
Total indefinite-lived intangible assets |  |  | 63 |  |  |  |  | 59 |  |  |
Total other intangible assets |  |  | $ | 81 |  |  | $ | 9 |  |  | $ | 75 |  |  | $ | 6 |

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