CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 31, 2021
Income Statement [Abstract]
Net sales	$ 30,272	$ 28,928	$ 26,950
Cost of sales	26,141	24,746	23,011
Gross profit	4,131	4,182	3,939
Operating expenses	3,973	3,825	3,593
Restructuring, acquisition and integration related expenses	8	21	56
Loss (gain) on sale of assets and other asset charges	30	(87)	(4)
Operating income	120	423	294
Net periodic benefit income, excluding service cost	(29)	(40)	(85)
Interest expense, net	144	155	204
Other income, net	(2)	(2)	(8)
Income from continuing operations before income taxes	7	310	183
(Benefit) provision for income taxes	(23)	56	34
Net income from continuing operations	30	254	149
Income from discontinued operations, net of tax	0	0	6
Net income including noncontrolling interests	30	254	155
Less net income attributable to noncontrolling interests	(6)	(6)	(6)
Net income attributable to United Natural Foods, Inc.	$ 24	$ 248	$ 149
Basic earnings per share:
Continuing operations (in dollars per share)	$ 0.41	$ 4.28	$ 2.55
Discontinued operations (in dollars per share)	0	0	0.10
Basic earnings per share (in dollars per share)	0.41	4.28	2.65
Diluted earnings per share:
Continuing operations (in dollars per share)	0.40	4.07	2.38
Discontinued operations (in dollars per share)	0	0	0.09
Diluted earnings per share (in dollars per share)	$ 0.40	$ 4.07	$ 2.48
Weighted average shares outstanding:
Basic (in shares)	59.2	58.0	56.1
Diluted (in shares)	60.7	61.0	60.0