Intangible Assets (Tables)

6 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Amortizable Intangible Assets

Intangible assets consisted of the following:

	As of September 30, 2020
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Software	$	4,006	$	2,819	$	1,187
Customer related intangible assets	4,246		1,502		2,744
Other intangible assets	258		43		215
Total intangible assets	$	8,510	$	4,364	$	4,146

	As of March 31, 2020
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Software	$	4,048	$	2,614	$	1,434
Customer related intangible assets	5,795		1,697		4,098
Other intangible assets	235		36		199
Total intangible assets	$	10,078	$	4,347	$	5,731

Schedule of Components of Amortization Expense

The components of amortization expense were as follows:

	Three Months Ended				Six Months Ended
(in millions)	September 30, 2020		September 30, 2019		September 30, 2020		September 30, 2019
Intangible asset amortization	$	258	$	239	$	511	$	475
Transition and transformation contract cost amortization(1)	67		59		128		126
Total amortization expense	$	325	$	298	$	639	$	601

(1)Transition and transformation contract costs are included within other assets on the balance sheet.

Estimated Future Amortization of Intangible Assets

Estimated future amortization related to intangible assets as of September 30, 2020 is as follows:

Fiscal Year	(in millions)
Remainder of 2021	$	458
2022	$	820
2023	$	755
2024	$	625
2025	$	573