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BENEFIT PLANS - Schedule of Collective Bargaining Agreement Dates and Contributions to Each Plant (Details)
 6 Months Ended
Jan. 26, 2019
agreement
Minneapolis Food Distributing Industry Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
Total Collective Bargaining Agreements 1 [1]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date May 31, 2022 [1]
Percentage of associates under collective bargaining agreement 100.00% [1],[2]
Over Five Percent Contribution Yes
Minneapolis Retail Meat Cutters And Food Handlers Pension Fund [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Total Collective Bargaining Agreements 1 [3]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Mar. 04, 2023 [3]
Percentage of associates under collective bargaining agreement 100.00% [2],[3]
Over Five Percent Contribution Yes
Central States, Southeast and Southwest Areas Pension Fund(2)(3)  
Defined Benefit Plan Disclosure [Line Items]  
Total Collective Bargaining Agreements 4 [1],[3]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Sep. 14, 2019 [1],[3]
Percentage of associates under collective bargaining agreement 41.70% [1],[2],[3]
Over Five Percent Contribution No
UFCW Unions and Participating Employers Pension Fund  
Defined Benefit Plan Disclosure [Line Items]  
Total Collective Bargaining Agreements 2 [3]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Jul. 11, 2020 [3]
Percentage of associates under collective bargaining agreement 71.00% [2],[3]
Over Five Percent Contribution Yes
Western Conference of Teamsters Pension Trust(2)  
Defined Benefit Plan Disclosure [Line Items]  
Total Collective Bargaining Agreements 21 [1]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Jul. 17, 2021 [1]
Percentage of associates under collective bargaining agreement 16.60% [1],[2]
Over Five Percent Contribution No
UFCW Unions and Employers Pension Plan  
Defined Benefit Plan Disclosure [Line Items]  
Total Collective Bargaining Agreements 1 [3]
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Apr. 06, 2019 [3]
Percentage of associates under collective bargaining agreement 100.00% [2],[3]
Over Five Percent Contribution Yes
[1] These multiemployer pension plans reflect plans of continuing operations.
[2] Company participating employees in the most significant collective bargaining agreement as a percent of all Company employees participating in the respective fund.
[3] These multiemployer pension plans reflect plans of discontinued operations.