Leases, Supplemental Cash Flow Information and Non-cash Activity Related to Operating Leases (Details) - USD ($) $ in Thousands		12 Months Ended
	Aug. 04, 2020	Jul. 28, 2023	Jul. 29, 2022	Jul. 30, 2021
Operating cash flow information [Abstract]
Gain on sale and leaseback transactions	$ 217,722	$ 0	$ 0	$ 217,722
Cash paid for amounts included in the measurement of lease liabilities		95,294	92,600	89,264
Noncash information [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities		17,378	19,143	316,563
Lease modifications or reassessments increasing or decreasing right-of-use assets		11,320	11,978	35,059
Lease modifications removing right-of-use assets		$ (413)	$ (670)	$ (544)