Derivative Instruments and Hedging Activities, Amounts Reclassified out of AOCIL Related to Interest Rate Swaps (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Jul. 31, 2020	[1],[2]	May 01, 2020	[2],[3]	Jan. 31, 2020	Nov. 01, 2019	Aug. 02, 2019	[1],[2]	May 03, 2019	[2],[3]	Feb. 01, 2019	Nov. 02, 2018	Jul. 31, 2020	Aug. 02, 2019	Aug. 03, 2018
Amounts Reclassified Out of AOCIL Related to Interest Rate Swaps [Abstract]
Interest expense													$ 22,327	$ 16,488	$ 15,169
Tax benefit													(28,683)	42,955	30,803
Net of tax	$ 25,066		$ (161,932)		$ 61,168	$ 43,223	$ 65,025		$ 50,414		$ 60,755	$ 47,207	(32,475)	223,401	247,620
Interest Rate Swaps [Member] | Cash Flow Hedging [Member]
Amounts Reclassified Out of AOCIL Related to Interest Rate Swaps [Abstract]
Ineffectiveness recorded in earnings on interest rate cash flow hedge													0	0	0
Loss on Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Cash Flow Hedging [Member]
Amounts Reclassified Out of AOCIL Related to Interest Rate Swaps [Abstract]
Tax benefit													291	(52)	1,038
Net of tax													(874)	154	(2,360)
Loss on Cash Flow Hedges [Member] | Interest Rate Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Income (Loss) [Member] | Cash Flow Hedging [Member]
Amounts Reclassified Out of AOCIL Related to Interest Rate Swaps [Abstract]
Interest expense													$ (1,165)	$ 206	$ (3,398)

[1] In the fourth quarter of 2020, the Company completed a sale and leaseback transaction and recorded a gain on the sale and leaseback transaction of $69,954.

[2] The Company’s operating results were adversely affected by the impact of the COVID-19 pandemic.

[3] In the third quarter of 2020, the Company recorded a loss of $132,878, which represented its equity investment in PBS HC and its receivable related to the principal and accumulated interest amounts on PBS HC promissory notes.  See Note 3 for further information regarding the Company’s investment in PBS HC.