Enterprise-Wide Disclosures Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail)	12 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Percentage Of Net Sales	100.00%	100.00%	100.00%
Domestic (U.S.)
Segment Reporting Information [Line Items]
Percentage Of Net Sales	75.00%	77.00%	74.00%
China
Segment Reporting Information [Line Items]
Percentage Of Net Sales	19.00%	19.00%	24.00%
Canada
Segment Reporting Information [Line Items]
Percentage Of Net Sales	1.00%	1.00%	0.00%
Foreign
Segment Reporting Information [Line Items]
Percentage Of Net Sales	5.00%	3.00%	2.00%