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BENEFIT PLANS - Schedule of Collective Bargaining Agreement Dates and Contributions to Each Plant (Details)	3 Months Ended
	Oct. 27, 2018 agreement
Minneapolis Food Distributing Industry Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Total Collective Bargaining Agreements	1
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	May 31, 2022
Percentage of associates under collective bargaining agreement	100.00%
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
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	Mar. 04, 2023
Percentage of associates under collective bargaining agreement	100.00%
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
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	Sep. 14, 2019
Percentage of associates under collective bargaining agreement	42.30%
Over Five Percent Contribution	No
UFCW Unions and Participating Employers Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Total Collective Bargaining Agreements	2
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	Jul. 11, 2020
Percentage of associates under collective bargaining agreement	68.20%
Over Five Percent Contribution	Yes
Western Conference of Teamsters Pension Trust(2)
Defined Benefit Plan Disclosure [Line Items]
Total Collective Bargaining Agreements	21
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	Jul. 17, 2021
Percentage of associates under collective bargaining agreement	20.80%
Over Five Percent Contribution	No
UFCW Unions and Employers Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Total Collective Bargaining Agreements	1
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date	Apr. 06, 2019
Percentage of associates under collective bargaining agreement	100.00%
Over Five Percent Contribution	Yes

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Over five percent contribution.

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- Definition

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- Definition

Expiration date of the collective bargaining arrangement requiring contributions to the multiemployer plan, in CCYY-MM-DD format. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

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- Definition

Percentage of employee participants subject to a collective bargaining arrangement to all of the employer's participants in a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

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