Intangible Assets

9 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

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

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 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