Note 6—Intangible Assets and Goodwill

Indefinite-lived and finite-lived intangible assets consisted of the following:



	September 30, 2017							September 30, 2016
	Gross		Accumulated Amortization			Net		Gross		Accumulated Amortization			Net
	(in millions)
Finite-lived intangible assets:
Customer relationships	$	438	$	(237	)	$	201	$	351	$	(220	)	$	131
Trade names	195		(93		)	102		192		(80		)	112
Reseller relationships	95		(79		)	16		95		(70		)	25
Other	17		(9		)	8		18		(9		)	9
Total finite-lived intangible assets	745		(418		)	327		656		(379		)	277
Indefinite-lived intangible assets:
Customer relationships and reacquired rights	23,437		—			23,437		22,873		—			22,873
Visa trade name	4,084		—			4,084		4,084		—			4,084
Total indefinite-lived intangible assets	27,521		—			27,521		26,957		—			26,957
Total intangible assets	$	28,266	$	(418	)	$	27,848	$	27,613	$	(379	)	$	27,234

Amortization expense related to finite-lived intangible assets was $56 million, $50 million and $63 million for fiscal 2017, 2016 and 2015, respectively. At September 30, 2017, estimated future amortization expense on finite-lived intangible assets is as follows:



Fiscal:	2018		2019		2020		2021		2022 and thereafter		Total
	(in millions)
Estimated future amortization expense	$	40	$	40	$	40	$	40	$	71	$	231

There was no impairment related to the Company’s indefinite-lived or finite-lived intangible assets during fiscal 2017, 2016 or 2015.

In February 2017, the Company acquired a business for a total purchase consideration net of cash received of approximately $302 million, paid primarily with cash on hand. Total purchase consideration has been allocated to the tangible and identifiable intangible assets acquired, and to liabilities assumed based on their respective fair values on the acquisition date. Related finite-lived intangible assets recorded totaled $104 million with a weighted-average useful life of eight years. Goodwill of $181 million was recorded to reflect the excess purchase consideration over net assets acquired. The consolidated financial statements include the operating results of the acquired business from the date of acquisition. Pro forma information related to the acquisition has not been presented as the impact is not material to the Company's financial results.

The increase in total net intangible assets and goodwill during 2017 was primarily related to foreign currency translation, which is recorded as a component of accumulated other comprehensive income in the consolidated balance sheet, as well as the additions described above, partially offset by measurement period adjustments as the Company finalized the Visa Europe purchase price allocation during fiscal 2017. See Note 2—Visa Europe.