PENSION PLANS - Assumptions Used (Details)	12 Months Ended
	Jul. 29, 2017	Jul. 30, 2016	Jul. 25, 2015
Defined Benefit Plan Disclosure [Line Items]
Assumed discount rate — net periodic pension cost	3.08%	4.02%	3.95%
Assumed discount rate — benefit obligation	3.60%	3.08%	4.02%
Expected rate of return on plan assets	7.50%	7.50%	7.50%
Minimum
Defined Benefit Plan Disclosure [Line Items]
Assumed rate of increase in compensation levels	4.00%	4.00%	4.00%
Maximum
Defined Benefit Plan Disclosure [Line Items]
Assumed rate of increase in compensation levels	4.50%	4.50%	4.50%