Intangible Assets (Tables)

9 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Amortizable Intangible Assets

Intangible assets consisted of the following:

	As of December 31, 2020
(in millions)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Software	$	4,001	$	2,891	$	1,110
Customer related intangible assets	4,296		1,606		2,690
Other intangible assets	267		48		219
Total intangible assets	$	8,564	$	4,545	$	4,019

	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				Nine Months Ended
(in millions)	December 31, 2020		December 31, 2019		December 31, 2020		December 31, 2019
Intangible asset amortization	$	224	$	272	$	735	$	747
Transition and transformation contract cost amortization(1)	66		71		194		197
Total amortization expense	$	290	$	343	$	929	$	944

(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 December 31, 2020 is as follows:

Fiscal Year	(in millions)
Remainder of 2021	$	236
2022	$	821
2023	$	740
2024	$	650
2025	$	535