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Net Sales (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 1,432.5 | $ 2,644.9
Distributors |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 712.4 | 1,358.0
Direct customers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 681.9 | 1,222.0
Licensees |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 38.2 | 64.9
Microcontrollers |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 778.6 | 1,500.9
Analog, interface, mixed signal and timing products |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 419.2 | 751.1
Memory products |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 48.1 | 98.1
Field-programmable gate array products |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 70.8 | 108.7
Technology licensing |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | 38.2 | 64.9
Multi-market and other |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 77.6 | $ 121.2

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