Intangible Assets



	As of September 30, 2017
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Software	$	3,180	$	1,707	$	1,473
Outsourcing contract costs	1,323		559		764
Customer related intangible assets	6,127		447		5,680
Other intangible assets	105		18		87
Total intangible assets	$	10,735	$	2,731	$	8,004



	As of March 31, 2017
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Software	$	2,347	$	1,554	$	793
Outsourcing contract costs	793		475		318
Customer related intangible assets	851		248		603
Other intangible assets	96		16		80
Total intangible assets	$	4,087	$	2,293	$	1,794

Total intangible assets amortization was $310 million and $82 million for the three months ended September 30, 2017 and September 30, 2016, respectively, and included reductions of revenue for amortization of outsourcing contract cost premiums of $3 million and $3 million, respectively.

Total intangible assets amortization was $514 million and $162 million for the six months ended September 30, 2017 and September 30, 2016, respectively, and included reductions of revenue for amortization of outsourcing contract cost premiums of $6 million and $6 million, respectively.

The increase in net and gross carrying value for the six months ended September 30, 2017 were primarily due to the Merger (see Note 3 - "Acquisitions").

Estimated future amortization related to intangible assets as of September 30, 2017 is as follows:



Fiscal Year	(in millions)
Remainder of 2018	$	559
2019	$	1,079
2020	$	1,008
2021	$	918
2022	$	778