CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Total United Natural Foods, Inc. Stockholders’ Equity	Noncontrolling Interests	Cumulative effect of change in accounting principle	Cumulative effect of change in accounting principle Additional Paid-in Capital	Cumulative effect of change in accounting principle Retained Earnings	Cumulative effect of change in accounting principle Total United Natural Foods, Inc. Stockholders’ Equity
Beginning balance at Jul. 29, 2017	$ 1,677,925	$ 506	$ 0	$ 460,011	$ (13,963)	$ 1,231,371	$ 1,677,925	$ 0
Beginning balance (Accounting Standards Update 2014-09) at Jul. 29, 2017									$ 509	$ 1,314	$ (805)	$ 509
Beginning balance (in shares) at Jul. 29, 2017		50,622,000	0
Increase (Decrease) in Stockholders' Equity
Restricted stock vestings and stock exercises, net	(3,588)	$ 4		(3,592)			(3,588)
Restricted stock vestings and stock exercises, net (in shares)		403,000
Share-based compensation	25,890			25,890			25,890
Repurchase of common stock	$ (24,231)		$ (24,231)				(24,231)
Repurchase of common stock (in shares)	614,660		615,000
Other comprehensive loss	$ (216)				(216)		(216)
Net (loss) income	162,777					162,777	162,777
Ending balance at Jul. 28, 2018	1,839,066	$ 510	$ (24,231)	483,623	(14,179)	1,393,343	1,839,066	0
Ending balance (Accounting Standards Update 2014-09) at Jul. 28, 2018									277		277	277
Ending balance (in shares) at Jul. 28, 2018		51,025,000	615,000
Increase (Decrease) in Stockholders' Equity
Restricted stock vestings and stock exercises, net	(2,608)	$ 5		(2,613)			(2,608)
Restricted stock vestings and stock exercises, net (in shares)		471,000
Share-based compensation	25,954			25,954			25,954
Other comprehensive loss	(94,774)				(94,774)		(94,774)
Acquisition of noncontrolling interest	(1,633)							(1,633)
Distributions to noncontrolling interests	(1,211)							(1,211)
Proceeds from the issuance of common stock, net	$ 23,857	$ 20		23,837			23,857
Proceeds from the issuance of common stock, net (in shares)	2,004,730	2,005,000
Net (loss) income	$ (284,623)					(284,730)	(284,730)	107
Ending balance at Aug. 03, 2019	$ 1,504,305	$ 535	$ (24,231)	530,801	(108,953)	1,108,890	1,507,042	(2,737)
Ending balance (Accounting Standards Update 2016-02) at Aug. 03, 2019									$ 2,883		$ 2,883	$ 2,883
Ending balance (in shares) at Aug. 03, 2019	52,886,000	53,501,000	615,000
Increase (Decrease) in Stockholders' Equity
Restricted stock vestings and stock exercises, net	$ (1,023)	$ 5		(1,028)			(1,023)
Restricted stock vestings and stock exercises, net (in shares)		473,000
Share-based compensation	$ 24,643			24,643			24,643
Repurchase of common stock (in shares)	0
Other comprehensive loss	$ (128,993)				(128,993)		(128,993)
Distributions to noncontrolling interests	(4,679)							(4,679)
Proceeds from the issuance of common stock, net	$ 14,333	$ 13		14,320			14,333
Proceeds from the issuance of common stock, net (in shares)	1,349,655	1,332,000
Net (loss) income	$ (269,211)					(274,140)	(274,140)	4,929
Ending balance at Aug. 01, 2020	$ 1,142,258	$ 553	$ (24,231)	$ 568,736	$ (237,946)	$ 837,633	$ 1,144,745	$ (2,487)
Ending balance (in shares) at Aug. 01, 2020	54,691,000	55,306,000	615,000