CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (unaudited) - USD ($) shares in Millions, $ in Millions	Total	Cumulative effect of change in accounting principle	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Cumulative effect of change in accounting principle	Total United Natural Foods, Inc. Stockholders’ Equity	Total United Natural Foods, Inc. Stockholders’ Equity Cumulative effect of change in accounting principle	Noncontrolling Interests
Beginning balance (in shares) at Aug. 01, 2020			55.3	0.6
Beginning balance at Aug. 01, 2020	$ 1,142	$ (9)	$ 1	$ (24)	$ 569	$ (239)	$ 838	$ (9)	$ 1,145	$ (9)	$ (3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock vestings (in shares)			1.7
Restricted stock vestings	(13)				(13)				(13)
Share-based compensation	33				33				33
Other comprehensive income	41					41			41
Distributions to noncontrolling interests	(3)										(3)
Acquisition of noncontrolling interests	(1)				(1)				(1)
Net income	111						106		106		5
Ending balance (in shares) at May. 01, 2021			57.0	0.6
Ending balance at May. 01, 2021	1,301		$ 1	$ (24)	588	(198)	935		1,302		(1)
Beginning balance (in shares) at Jan. 30, 2021			56.8	0.6
Beginning balance at Jan. 30, 2021	1,229		$ 1	$ (24)	581	(215)	887		1,230		(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock vestings (in shares)			0.2
Restricted stock vestings	(2)				(2)				(2)
Share-based compensation	10				10				10
Other comprehensive income	17					17			17
Distributions to noncontrolling interests	(2)										(2)
Acquisition of noncontrolling interests	(1)				(1)				(1)
Net income	50						48		48		2
Ending balance (in shares) at May. 01, 2021			57.0	0.6
Ending balance at May. 01, 2021	$ 1,301		$ 1	$ (24)	588	(198)	935		1,302		(1)
Beginning balance (in shares) at Jul. 31, 2021	56.4		57.0	0.6
Beginning balance at Jul. 31, 2021	$ 1,514		$ 1	$ (24)	599	(39)	978		1,515		(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock vestings (in shares)			2.0
Restricted stock vestings	(42)				(42)				(42)
Share-based compensation	33				33				33
Other comprehensive income	61					61			61
Distributions to noncontrolling interests	(4)										(4)
Proceeds from issuance of common stock, net	9				9				9
Net income	$ 213						209		209		4
Ending balance (in shares) at Apr. 30, 2022	58.4		59.0	0.6
Ending balance at Apr. 30, 2022	$ 1,784		$ 1	$ (24)	599	22	1,187		1,785		(1)
Beginning balance (in shares) at Jan. 29, 2022			58.8	0.6
Beginning balance at Jan. 29, 2022	1,683		$ 1	$ (24)	596	(9)	1,120		1,684		(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock vestings (in shares)			0.2
Restricted stock vestings	(7)				(7)				(7)
Share-based compensation	10				10				10
Other comprehensive income	31					31			31
Distributions to noncontrolling interests	(1)										(1)
Net income	$ 68						67		67		1
Ending balance (in shares) at Apr. 30, 2022	58.4		59.0	0.6
Ending balance at Apr. 30, 2022	$ 1,784		$ 1	$ (24)	$ 599	$ 22	$ 1,187		$ 1,785		$ (1)