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Mergers and Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Millions	Dec. 30, 2017	Aug. 09, 2017	Jul. 01, 2017
Business Acquisition [Line Items]
Goodwill	$ 170.7		$ 151.6
Trilithic, Inc
Business Acquisition [Line Items]
Net tangible assets acquired		$ 11.8
Goodwill		17.8
Total purchase price		56.4
Trilithic, Inc | Developed technology
Business Acquisition [Line Items]
Intangible assets acquired:		15.5
Trilithic, Inc | Customer relationships
Business Acquisition [Line Items]
Intangible assets acquired:		11.0
Trilithic, Inc | Other
Business Acquisition [Line Items]
Intangible assets acquired:		$ 0.3

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