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Intangible Assets and Goodwill - Goodwill by Reporting Segment (Details) $ in Millions | 6 Months Ended |
--- | --- | ---
Sep. 30, 2023 USD ($) reporting_unit | Mar. 31, 2023 USD ($)
Goodwill By Reporting Segment [Line Items] |  |
Goodwill | $ 6,675.4 | $ 6,673.6
Number of reporting units | reporting_unit | 2 |
Semiconductor Products Reporting Unit |  |
Goodwill By Reporting Segment [Line Items] |  |
Goodwill | $ 6,656.2 | 6,654.4
Additions | 1.8 |
Technology Licensing Reporting Unit |  |
Goodwill By Reporting Segment [Line Items] |  |
Goodwill | 19.2 | $ 19.2
Additions | $ 0.0 |

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