CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 30, 2021	Feb. 01, 2020	Jan. 30, 2021	Feb. 01, 2020
Income Statement [Abstract]
Net sales	$ 6,888,133	$ 6,431,382	$ 13,560,740	$ 12,727,994
Cost of sales	5,897,774	5,514,057	11,603,882	10,903,458
Gross profit	990,359	917,325	1,956,858	1,824,536
Operating expenses	866,880	862,732	1,767,842	1,746,420
Goodwill and asset impairment charges	0	0	0	425,405
Restructuring, acquisition and integration related expenses	17,783	36,522	34,211	51,194
Loss on sale of assets	399	524	169	434
Operating income (loss)	105,297	17,547	154,636	(398,917)
Other expense (income):
Net periodic benefit income, excluding service cost	(17,127)	(3,277)	(34,160)	(14,661)
Interest expense, net	50,944	48,836	120,077	98,545
Other, net	(1,674)	(1,220)	(2,472)	(1,620)
Total other expense, net	32,143	44,339	83,445	82,264
Income (loss) from continuing operations before income taxes	73,154	(26,792)	71,191	(481,181)
Provision (benefit) for income taxes	16,392	(12,808)	15,401	(79,763)
Net income (loss) from continuing operations	56,762	(13,984)	55,790	(401,418)
Income (loss) from discontinued operations, net of tax	3,803	(16,076)	5,099	(12,050)
Net income (loss) including noncontrolling interests	60,565	(30,060)	60,889	(413,468)
Less net income attributable to noncontrolling interests	(1,605)	(650)	(2,972)	(1,169)
Net income (loss) attributable to United Natural Foods, Inc.	$ 58,960	$ (30,710)	$ 57,917	$ (414,637)
Basic earnings (loss) per share:
Continuing operations (in dollars per share)	$ 0.98	$ (0.27)	$ 0.95	$ (7.54)
Discontinued operations (in dollars per share)	0.07	(0.30)	0.09	(0.23)
Basic loss per share (in dollars per share)	1.05	(0.57)	1.04	(7.77)
Diluted earnings (loss) per share:
Continuing operations (in dollars per share)	0.93	(0.27)	0.89	(7.54)
Discontinued operations (in dollars per share)	0.06	(0.30)	0.09	(0.23)
Diluted loss per share (in dollars per share)	$ 1.00	$ (0.57)	$ 0.98	$ (7.77)
Weighted average shares outstanding:
Basic (in shares)	56,138	53,523	55,717	53,368
Diluted (in shares)	59,205	53,523	59,119	53,368