Intangible Assets (Tables)

6 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Amortizable 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

Estimated Future Amortization of Intangible Assets

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