BENEFIT PLANS - Significant Multiemployer Plans (Details) $ in Millions	12 Months Ended
	Aug. 03, 2019 USD ($) Plan	Jul. 28, 2018
Defined Benefit Plan Disclosure [Line Items]
Contributions	$ 41
PPA surcharges	5.00%	10.00%
Minneapolis Food Distributing Industry Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions	$ 8
Minneapolis Retail Meat Cutters And Food Handlers Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions	7
Minneapolis Retail Meat Cutters And Food Handlers Variable Annuity Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions	1
Central States, Southeast and Southwest Areas Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions	5
Ufcw Unions And Participating Employers Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Contributions	4
Western Conference Of Teamsters Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions	12
Ufcw Unions And Employers Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Contributions	1
All Other Multiemployer Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Contributions	$ 3
All other multiemployer pension plans | Plan	6