Enterprise-Wide Disclosures Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail)	12 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jul. 02, 2016
Segment Reporting Information [Line Items]
Percentage Of Net Sales	100.00%	100.00%	0.00%
Domestic (U.S.)
Segment Reporting Information [Line Items]
Percentage Of Net Sales	74.00%	77.00%	72.00%
China
Segment Reporting Information [Line Items]
Percentage Of Net Sales	24.00%	19.00%	15.00%
Canada
Segment Reporting Information [Line Items]
Percentage Of Net Sales	0.00%	1.00%	7.00%
Foreign
Segment Reporting Information [Line Items]
Percentage Of Net Sales	2.00%	3.00%	6.00%