Summary of Significant Accounting Policies Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018	Jun. 25, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Returns and allowances reserve	$ 148,916	$ 100,489	$ 0
Estimated returns and allowances against revenues	767,781	568,550
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Returns and allowances reserve	645	148	140,115	$ 46,575
Estimated returns and allowances against revenues	625	697	659,023
SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction	$ 128	$ 140,664	$ 565,483