Derivative Instruments and Hedging Activities, Amounts Reclassified out of AOCL Related to Interest Rate Swaps (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Apr. 30, 2021	Jan. 29, 2021	Oct. 30, 2020	May 01, 2020	Jan. 31, 2020	Nov. 01, 2019	Apr. 30, 2021	May 01, 2020
Amounts Reclassified Out of AOCL Related to Interest Rate Swaps [Abstract]
Interest expense	$ 9,614			$ 5,298			$ 31,144	$ 12,383
Provision for income taxes (income tax benefit)	(9,406)			55,220			(54,697)	33,752
Net of tax	33,470	$ 14,000	$ 170,680	$ (161,932)	$ 61,168	$ 43,223	218,150	$ (57,541)
Interest Rate Swaps [Member] | Cash Flow Hedging [Member]
Amounts Reclassified Out of AOCL Related to Interest Rate Swaps [Abstract]
Gains or losses representing amounts excluded from assessment of effectiveness							0
Loss on Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Cash Flow Hedging [Member]
Amounts Reclassified Out of AOCL Related to Interest Rate Swaps [Abstract]
Provision for income taxes (income tax benefit)	547						1,542
Net of tax	(1,647)						(4,637)
Loss on Cash Flow Hedges [Member] | Interest Rate Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member] | Cash Flow Hedging [Member]
Amounts Reclassified Out of AOCL Related to Interest Rate Swaps [Abstract]
Interest expense	$ (2,194)						$ (6,179)