SIGNIFICANT ACCOUNTING POLICIES (Details 8) - USD ($) shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Jul. 29, 2017	Jul. 30, 2016	Aug. 01, 2015
Earnings Per Share
Basic weighted average shares outstanding	50,617	50,601	50,587	50,475	50,381	50,350	50,326	50,194	50,570	50,313	50,021
Net effect of dilutive common stock equivalents based upon the treasury stock method									205	86	246
Diluted weighted average shares outstanding	50,947	50,801	50,755	50,599	50,516	50,379	50,388	50,313	50,775	50,399	50,267
Potential anti-dilutive share-based payment awards excluded from the computation above									44	84	7
Shipping and Handling Fees and Costs
Outbound shipping and handling costs, excluding employee benefit expenses									$ 517.2	$ 467.5	$ 452.9