7. Other Intangible Assets, net

The components of finite-lived intangible assets and intangible assets not subject to amortization are as follows:



		August 4, 2018						July 29, 2017						February 3, 2018
		Gross		Accum.		Net		Gross		Accum.		Net		Gross		Accum.		Net
($ in millions)		value		amort.		value		value		amort.		value		value		amort.		value
Amortized intangible assets: (1)
	Lease acquisition costs	$	125	$	(115)	$	10	$	128	$	(115)	$	13	$	135	$	(122)	$	13
	Trademarks / trade names		20		(14)		6		20		(13)		7		20		(14)		6
	Favorable leases		7		(6)		1		7		(6)		1		7		(6)		1
		$	152	$	(135)	$	17	$	155	$	(134)	$	21	$	162	$	(142)	$	20
Indefinite life intangible assets: (1)
	Runners Point Group trademarks / trade names					$	24					$	24					$	26
Other intangible assets, net						$	41					$	45					$	46


(1)	The change in the ending balances also reflects the effect of foreign currency fluctuations due primarily to the movements of the euro in relation to the U.S. dollar.

The annual review of intangible assets with indefinite lives performed during the first quarter of 2018 did not result in the recognition of impairment. Amortization expense recorded is as follows:



	Thirteen weeks ended				Twenty-six weeks ended
($ in millions)	August 4, 2018		July 29, 2017		August 4, 2018		July 29, 2017
Amortization expense	$	1	$	1	$	2	$	2

Estimated future amortization expense for finite-life intangible assets is as follows:


		($ in millions)
Remainder of 2018	$	2
2019		4
2020		3
2021		2
2022		2
2023		2