Intangible Assets (Tables)

9 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Amortizable Intangible Assets

	As of December 31, 2017
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Software	$	3,231	$	1,792	$	1,439
Outsourcing contract costs	1,436		612		824
Customer related intangible assets	6,151		583		5,568
Other intangible assets	114		18		96
Total intangible assets	$	10,932	$	3,005	$	7,927

	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 December 31, 2017 is as follows:

Fiscal Year	(in millions)
Remainder of 2018	$	306
2019	$	1,094
2020	$	1,032
2021	$	943
2022	$	804