CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2022	May 01, 2021	Apr. 30, 2022	May 01, 2021
Income Statement [Abstract]
Net sales	$ 7,242	$ 6,631	$ 21,655	$ 20,215
Cost of sales	6,230	5,661	18,526	17,280
Gross profit	1,012	970	3,129	2,935
Operating expenses	969	868	2,845	2,642
Restructuring, acquisition and integration related expenses	8	10	16	44
Gain on sale of assets	(88)	0	(87)	0
Operating income	123	92	355	249
Net periodic benefit income, excluding service cost	(10)	(17)	(30)	(51)
Interest expense, net	37	44	121	164
Other, net	(1)	(1)	(2)	(4)
Income from continuing operations before income taxes	97	66	266	140
Provision for income taxes	29	16	53	32
Net income from continuing operations	68	50	213	108
Income from discontinued operations, net of tax	0	0	0	3
Net income including noncontrolling interests	68	50	213	111
Less net income attributable to noncontrolling interests	(1)	(2)	(4)	(5)
Net income attributable to United Natural Foods, Inc.	$ 67	$ 48	$ 209	$ 106
Basic earnings per share:
Continuing operations (in dollars per share)	$ 1.15	$ 0.85	$ 3.62	$ 1.84
Discontinued operations (in dollars per share)	0	0.01	0	0.06
Basic earnings per share (in dollars per share)	1.15	0.86	3.62	1.90
Diluted earnings per share:
Continuing operations (in dollars per share)	1.10	0.79	3.44	1.73
Discontinued operations (in dollars per share)	0	0.01	0	0.05
Diluted earnings per share (in dollars per share)	$ 1.10	$ 0.80	$ 3.44	$ 1.78
Weighted average shares outstanding:
Basic (in shares)	58.4	56.5	57.9	56.0
Diluted (in shares)	60.9	60.5	61.0	59.7