Enterprise-Wide Disclosures Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Detail)	12 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jun. 27, 2015
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	77.00%	72.00%	70.00%
Canada
Segment Reporting Information [Line Items]
Percentage Of Net Sales	1.00%	7.00%	10.00%
Foreign
Segment Reporting Information [Line Items]
Percentage Of Net Sales	22.00%	21.00%	20.00%