Intangible Assets (Tables)

12 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Amortizable Intangible Assets

The Company's estimated useful lives for finite-lived intangibles are shown in the table below:

Software	2 to 10 years
Customer related intangibles	Expected customer service life
Acquired contract related intangibles	Contract life and first contract renewal, where applicable

Intangible assets consisted of the following:

	As of March 31, 2021
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Software	$	4,014	$	2,733	$	1,281
Customer related intangible assets	4,212		1,641		2,571
Other intangible assets	239		48		191
Total intangible assets	$	8,465	$	4,422	$	4,043

	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:

	Fiscal Years Ended
(in millions)	March 31, 2021		March 31, 2020		March 31, 2019
Intangible asset amortization	$	952	$	1,019	$	890
Transition and transformation contract cost amortization(1)	264		280		258
Total amortization expense	$	1,216	$	1,299	$	1,148

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

Estimated Future Amortization of Intangible Assets

Estimated future amortization as of March 31, 2021 is as follows:

Fiscal Year	(in millions)
2022	$	837
2023	$	755
2024	$	669
2025	$	554
2026	$	505