CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	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	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Retained Earnings Cumulative effect of change in accounting principle	Noncontrolling Interests
Beginning balance (in shares) at Aug. 01, 2020					55.3
Beginning balance at Aug. 01, 2020	$ 1,142	$ (9)	$ 1,145	$ (9)	$ 1	$ (24)	$ 569	$ (239)	$ 838	$ (9)	$ (3)
Treasury stock, beginning balance (in shares) at Aug. 01, 2020						0.6
Increase (Decrease) in Stockholders' Equity
Restricted stock vestings (in shares)					1.6
Restricted stock vestings	(14)		(14)				(14)
Share-based compensation	45		45				45
Other comprehensive income (loss)	200		200					200
Distributions to noncontrolling interests	(4)										(4)
Proceeds from the issuance of common stock, net (in shares)					0.1
Proceeds from issuance of common stock, net	1		1				1
Acquisition of noncontrolling interests	(2)		(2)				(2)
Total reclassifications, net of tax	155		149						149		6
Ending balance (in shares) at Jul. 31, 2021					57.0
Ending balance at Jul. 31, 2021	1,514		1,515		$ 1	$ (24)	599	(39)	978		(1)
Treasury stock, ending balance (in shares) at Jul. 31, 2021						0.6
Increase (Decrease) in Stockholders' Equity
Restricted stock vestings (in shares)					1.7
Restricted stock vestings	(41)		(41)				(41)
Share-based compensation	44		44				44
Other comprehensive income (loss)	19		19					19
Distributions to noncontrolling interests	(4)										(4)
Proceeds from the issuance of common stock, net (in shares)					0.2
Proceeds from issuance of common stock, net	8		8				8
Acquisition of noncontrolling interests	(2)		(2)				(2)
Total reclassifications, net of tax	$ 254		248						248		6
Ending balance (in shares) at Jul. 30, 2022	58.3				58.9
Ending balance at Jul. 30, 2022	$ 1,792		1,791		$ 1	$ (24)	608	(20)	1,226		1
Treasury stock, ending balance (in shares) at Jul. 30, 2022						0.6
Increase (Decrease) in Stockholders' Equity
Restricted stock vestings (in shares)					2.1
Restricted stock vestings	(40)		(40)				(40)
Share-based compensation	38		38				38
Repurchase of common stock	(62)		(62)			$ (62)
Repurchase of common stock (in shares)						1.9
Other comprehensive income (loss)	(8)		(8)					(8)
Distributions to noncontrolling interests	(6)										(6)
Total reclassifications, net of tax	$ 30		24						24		6
Ending balance (in shares) at Jul. 29, 2023	58.5				61.0
Ending balance at Jul. 29, 2023	$ 1,744		$ 1,743		$ 1	$ (86)	$ 606	$ (28)	$ 1,250		$ 1
Treasury stock, ending balance (in shares) at Jul. 29, 2023						2.5