Revenue - Schedule of Revenue by Geographical Location (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 4,920	$ 4,007	$ 3,233
United States
Disaggregation of Revenue [Line Items]
Revenue	1,761	1,716	1,413
PRC
Disaggregation of Revenue [Line Items]
Revenue	874	749	697
Japan
Disaggregation of Revenue [Line Items]
Revenue	825	296	121
Taiwan
Disaggregation of Revenue [Line Items]
Revenue	695	629	522
Republic of Korea
Disaggregation of Revenue [Line Items]
Revenue	392	324	308
Other countries
Disaggregation of Revenue [Line Items]
Revenue	$ 373	$ 293	$ 172

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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