Fair Value Measurements Private Company Investments (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Dec. 26, 2020	Dec. 26, 2020	Dec. 28, 2019
Investments, Debt and Equity Securities [Abstract]
Cost Method Investments	$ 26,200	$ 26,200	$ 20,600
Accumulated gains or losses on private company investments	1,200	1,200	(4,300)
Unrealized Gain (Loss) on Investments	$ 4,900	$ 5,500	$ 600

Amount of unrealized gain (loss) on investment.

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=121586364&loc=d3e3602-108585

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