Other Intangible Assets

12 Months Ended

Dec. 31, 2017

Intangible Assets, Gross (Excluding Goodwill) [Abstract]

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

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, 2017, 2016 and 2015 amortization expense of $2 million, $1 million and $1 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 amortization expense for other intangible assets is $2 million in years 2018 and 2019 and $1 million in years 2020 through 2022.