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Share-Based Compensation - Microsemi Acquisition-related Equity Awards (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
May 29, 2018 | Mar. 31, 2019 | Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Non-cash consideration, exchange of employee stock awards - Microsemi acquisition |  | $ 53.9 |
Total compensation cost not yet recognized |  |  | $ 263.2
Microsemi Corporation | Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Non-cash consideration, exchange of employee stock awards - Microsemi acquisition | $ 175.4 |  |
Compensation costs recognized | 53.9 |  |
Total compensation cost not yet recognized | $ 121.5 |  |

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