Intangible Assets and Goodwill - Goodwill by Reporting Segment (Details) $ in Millions	6 Months Ended
	Sep. 30, 2025 USD ($) reportingUnit
Goodwill [Roll Forward]
Beginning balance	$ 6,684.8
Ending balance	$ 6,695.5
Number of reporting units \| reportingUnit	2
Semiconductor Products Reporting Unit
Goodwill [Roll Forward]
Beginning balance	$ 6,665.6
Additions due to acquisition	10.7
Ending balance	6,676.3
Technology Licensing Reporting Unit
Goodwill [Roll Forward]
Beginning balance	19.2
Additions due to acquisition	0.0
Ending balance	$ 19.2

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

MICROCHIP TECHNOLOGY INC 10-Q