Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Finite-Lived Intangible Assets

The estimated useful lives of the Company’s intangible assets are as follows:

Patents and licenses	3 – 11 years
Computer software	3 – 5 years
Developed technology	1 – 8 years
Customer relationships	1 – 6 years

Information related to intangible assets is as follows:

	As of March 31,
	Gross Carrying Amount				Accumulated Amortization				Net Carrying Value				Weighted Average Remaining Life
(in millions except for years)	2025		2024		2025		2024		2025		2024		2025	2024
Patents & licenses	$	146	$	179	$	117	$	144	$	29	$	35	5.0	5.6
Developed technology	139		157		139		156		—		1		—	0.1
Customer relationships	—		2		—		2		—		—		—	—
Computer software	356		329		234		214		122		115		2.1	2.8
Intangible assets subject to amortization	641		667		490		516		151		151
Intangible assets under development	—		1		—		—		—		1		—	—
Total intangible assets	$	641	$	668	$	490	$	516	$	151	$	152

Information regarding amortization expense for intangible assets is as follows:

	Fiscal Years Ended March 31,
(in millions)	2025		2024		2023
Cost of sales	$	2	$	6	$	4
Research and development	64		57		53
Selling, general and administrative	21		23		36
Total amortization expense	$	87	$	86	$	93

Schedule of Property and Equipment Useful Lives

Estimated useful lives of the Company’s property and equipment are as follows:

Leasehold improvements	Shorter of 5 – 10 years or the remaining lease term
Equipment	3 – 6 years
Fixtures and vehicles	3 – 5 years

Information regarding property and equipment, net is as follows:

	As of
(in millions)	March 31, 2025		March 31, 2024
Leasehold improvements	$	167	$	159
Equipment	603		388
Fixtures and vehicles	47		43
Construction in progress	41		16
Total property and equipment, gross	858		606
Less: Accumulated depreciation	(464)		(391)
Total property and equipment, net	$	394	$	215