Fair Value Measurements Private Company Investments (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 28, 2020	Mar. 30, 2019	Mar. 28, 2020	Mar. 30, 2019	Jun. 29, 2019
Investments, Debt and Equity Securities [Abstract]
Cost Method Investments	$ 20.5		$ 20.5		$ 20.7
Accumulated gains or losses on private company investments	(3.4)		(3.4)		$ 3.6
Unrealized Gain (Loss) on Securities	$ (0.4)	$ 0.2	$ 0.5	$ (0.2)

Amount of unrealized gain (loss) recognized in the income statement on unsold other securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration