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Document and Entity Information - shares	6 Months Ended
	Jan. 26, 2019	Mar. 01, 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	Jan. 26, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		50,819,894

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