Shareholders' Equity, Summary of Amounts Reclassified out of AOCL (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 28, 2017	Apr. 29, 2016	Apr. 28, 2017	Apr. 29, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (3,389)	$ (3,436)	$ (10,703)	$ (10,549)
Provision for income taxes	(21,165)	(14,423)	(71,209)	(54,036)
Net of tax	46,924	$ 49,169	148,006	$ 138,276
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	380		1,283
Net of tax	(613)		(2,071)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Interest Rate Swaps [Member] | Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (993)		$ (3,354)