Geographic and Segment Information - Net Sales and Gross Profit (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Segment reporting information [Line Items]
Net Sales	$ 6,820.9	$ 5,438.4	$ 5,274.2
Gross Profit	4,449.6	3,378.8	3,242.1
Semiconductor products
Segment reporting information [Line Items]
Net Sales	6,698.9	5,335.5	5,177.3
Gross Profit	4,327.6	3,275.9	3,145.2
Technology licensing
Segment reporting information [Line Items]
Net Sales	122.0	102.9	96.9
Gross Profit	$ 122.0	$ 102.9	$ 96.9

Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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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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