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Stock Option And Benefit Plans (Narrative) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions				12 Months Ended
	Jul. 29, 2022	Jul. 23, 2020	Jul. 27, 2019	Jul. 02, 2022	Jul. 03, 2021	Jun. 27, 2020	Jul. 26, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	165	155	175
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other than Option, Nonvested, Intrinsic Value	$ 7.17	$ 6.94					$ 4.93
Grant date fair value	$ 2.73	$ 2.32	$ 1.23
Stock-based compensation expense				$ 0.3	$ 0.2	$ 0.3
Unrecognized share based compensation expense				$ 0.4
Share Based Expense Recognition - Weighted-average period				1 year 9 months 14 days
Company contributions to 401K				$ 0.9	$ 0.9	$ 0.8
July 23, 2020 SAR Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding SARs				150
July 26, 2019 SAR Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding SARs				140
August 9, 2021 SAR Grant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding SARs				165
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	145
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other than Option, Nonvested, Intrinsic Value	$ 5.10
Grant date fair value	$ 2.09