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Document and Entity Information - shares	9 Months Ended
	Apr. 30, 2016	Jun. 03, 2016
Document and Entity Information
Entity Registrant Name	UNITED NATURAL FOODS INC
Entity Central Index Key	0001020859
Current Fiscal Year End Date	--07-30
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Apr. 30, 2016
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		50,380,711

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