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Other Intangible Assets
 12 Months Ended
Dec. 31, 2019
Intangible Assets, Gross (Excluding Goodwill) [Abstract]  
Other Intangible Assets Other Intangible Assets
Other intangible assets are presented in the following table.
December 31
 
 
2019
 
2018
(In millions)
Economic Useful Life
 
Gross Carrying Amount
 
Accumulated Amortization
 
Gross Carrying Amount
 
Accumulated Amortization
Finite-lived intangible assets:
 
 
 
 
 
 
 
 
 
Trade name
8 years
 
$
7

 
$
6

 
$
6

 
$
5

Distribution channel
15 years
 
11

 
5

 
10

 
4

Total finite-lived intangible assets
 
 
18

 
11

 
16

 
9

Indefinite-lived intangible assets:
 
 
 
 
 
 
 
 
 
Syndicate capacity
 
 
46

 
 
 
45

 
 
Agency force
 
 
16

 
 
 
16

 
 
Total indefinite-lived intangible assets
 
 
62

 
 
 
61

 
 
Total other intangible assets
 
 
$
80

 
$
11

 
$
77

 
$
9


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. For the years ended December 31, 2019, 2018 and 2017 amortization expense of $1 million, $1 million and $2 million was included in Other operating expenses. 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 2020 through 2024.