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
	Aug. 02, 2019	May 03, 2019	Feb. 01, 2019	Nov. 02, 2018	Aug. 03, 2018	[1]	Apr. 27, 2018	Jan. 26, 2018	Oct. 27, 2017	Aug. 02, 2019	Aug. 03, 2018	Jul. 28, 2017
Amounts Reclassified Out of AOCIL Related to Interest Rate Swaps [Abstract]
Interest expense										$ (16,488)	$ (15,169)	$ (14,271)
Provision for income taxes										42,955	30,803	96,988
Net of tax	$ 65,025	$ 50,414	$ 60,755	$ 47,207	$ 61,354		$ 48,747	$ 91,139	$ 46,380	223,401	247,620	201,899
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]
Provision for income taxes										(52)	1,038	1,592
Net of tax										154	(2,360)	(2,571)
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										$ 206	$ (3,398)	$ (4,163)

[1] The Company's fourth quarter of fiscal 2018 consisted of 14 weeks.