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Business Acquisitions Business Acquisitions (Microsemi - Schedule of Purchased Intangible Assets) (Details) - Microsemi Corporation - USD ($) $ in Millions |  | 3 Months Ended
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May 29, 2018 | Jun. 30, 2018
Business Acquisition [Line Items] |  |
Useful life (in years) | 9 years |
Purchased intangible assets | $ 4,722.0 |
Core/developed technology |  |
Business Acquisition [Line Items] |  |
Useful life (in years) | 10 years | 10 years
Purchased intangible assets | $ 3,803.0 | $ 3,800.0
Customer-related |  |
Business Acquisition [Line Items] |  |
Useful life (in years) | 10 years |
Purchased intangible assets | $ 448.1 |
Backlog |  |
Business Acquisition [Line Items] |  |
Useful life (in years) | 1 year | 1 year
Purchased intangible assets | $ 36.9 | $ 36.9
In-process technology |  |
Business Acquisition [Line Items] |  |
Indefinite-lived Intangible Assets Acquired | $ 434.0 |

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