Leases, Supplemental Cash Flow Information and Non-cash Activity Related to Operating Leases (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Aug. 04, 2020	Jan. 28, 2022	Jan. 29, 2021	Jan. 28, 2022	Jan. 29, 2021
Operating cash flow information [Abstract]
Gain on sale and leaseback transactions	$ 217,722	$ 0	$ 0	$ 0	$ 217,722
Cash paid for amounts included in the measurement of lease liabilities		23,068	22,415	45,861	44,681
Noncash information [Abstract]
Right-of-use assets obtained in exchange for new operating lease liabilities		4,969	3,556	11,657	315,189
Lease modifications or reassessments increasing or decreasing right-of-use assets		3,039	1,787	6,416	25,044
Lease modifications removing right-of-use assets		$ (174)	$ (89)	$ (336)	$ (348)