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Geographic and Segment Information (Tables)

12 Months Ended

Mar. 31, 2025

Segment Reporting [Abstract]

Schedule of Net Sales and Gross Profit for Each Segment

			Fiscal Year Ended March 31, 2025
			Semiconductor products						Technology licensing						Total
Net sales			$	4,270.5					$	131.1					$	4,401.6
Cost of sales			1,933.7						—						1,933.7
Gross profit			$	2,336.8					$	131.1					$	2,467.9

			Fiscal Year Ended March 31, 2024
			Semiconductor products						Technology licensing						Total
Net sales			$	7,531.1					$	103.3					$	7,634.4
Cost of sales			2,638.7						—						2,638.7
Gross profit			$	4,892.4					$	103.3					$	4,995.7

			Fiscal Year Ended March 31, 2023
			Semiconductor products						Technology licensing						Total
Net sales			$	8,277.7					$	161.0					$	8,438.7
Cost of sales			2,740.8						—						2,740.8
Gross profit			$	5,536.9					$	161.0					$	5,697.9

Identifiable long-lived assets (consisting of property, plant and equipment net of accumulated depreciation and ROU assets) by geographic area are as follows (in millions):

			March 31,
			2025						2024
United States			$	869.3					$	826.8
Thailand			123.7						152.2
Various other countries			337.0						371.9
Total long-lived assets			$	1,330.0					$	1,350.9

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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Publisher FASB
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

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- References

No definition available.

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