Leases, Supplemental Cash Flow Information and Non-cash Activity Related to Operating Leases (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Aug. 04, 2020	Apr. 29, 2022	Apr. 30, 2021	Apr. 29, 2022	Apr. 30, 2021
Operating cash flow information [Abstract]
Gain on sale and leaseback transaction	$ (217,722)	$ 0	$ 0	$ 0	$ (217,722)
Cash paid for amounts included in the measurement of lease liabilities		23,219	22,279	69,080	66,960
Noncash information [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities		2,893	267	14,550	315,456
Lease modifications or reassessments increasing or decreasing right-of-use assets		4,993	3,471	11,409	28,515
Lease modifications removing right-of-use assets		$ (90)	$ (104)	$ (426)	$ (452)