Document and Entity Information - shares	9 Months Ended
	Apr. 27, 2019	May 30, 2019
Document and Entity Information
Entity Registrant Name	UNITED NATURAL FOODS INC
Entity Central Index Key	0001020859
Current Fiscal Year End Date	--08-03
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Apr. 27, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		52,704,476