REVENUE RECOGNITION - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	May 02, 2020		Apr. 27, 2019		May 02, 2020		Apr. 27, 2019
Revenue from External Customer [Line Items]
Net sales	$ 6,667,681		$ 5,962,620		$ 18,824,870		$ 14,979,982
Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	6,670,044	[1]	5,944,521	[2]	18,821,520	[3]	14,932,905	[4]
Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	56,361		61,910		158,377		167,381
Supermarkets
Revenue from External Customer [Line Items]
Net sales	4,267,000		3,701,000	[5]	11,915,000		8,559,000	[5]
Supermarkets | Eliminations
Revenue from External Customer [Line Items]
Net sales	0		0		0		0
Supermarkets | Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	4,267,000		3,701,000	[5]	11,915,000		8,559,000	[5]
Net sales adjustment			26,000				77,000
Supermarkets | Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	0		0		0		0
Supernatural
Revenue from External Customer [Line Items]
Net sales	1,279,000		1,102,000		3,600,000		3,229,000
Supernatural | Eliminations
Revenue from External Customer [Line Items]
Net sales	0		0		0		0
Supernatural | Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	1,279,000		1,102,000		3,600,000		3,229,000	[5]
Supernatural | Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	0		0		0		0
Independents
Revenue from External Customer [Line Items]
Net sales	684,000		707,000	[5]	1,983,000	[5]	2,041,000	[5]
Independents | Eliminations
Revenue from External Customer [Line Items]
Net sales	0		0		0		0
Independents | Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	684,000		707,000	[5]	1,983,000	[5]	2,041,000
Net sales adjustment			(122,000)				(290,000)
Independents | Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	0		0		0		0
Other
Revenue from External Customer [Line Items]
Net sales	438,000		453,000	[5]	1,327,000	[5]	1,151,000	[5]
Other | Eliminations
Revenue from External Customer [Line Items]
Net sales	(59,000)		(44,000)		(155,000)		(120,000)
Other | Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	441,000		435,000	[5]	1,324,000	[5]	1,104,000	[5]
Net sales adjustment			96,000				213,000
Other | Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	56,000		62,000	[5]	158,000		167,000	[5]
Total
Revenue from External Customer [Line Items]
Net sales	6,668,000		5,963,000		18,825,000		14,980,000
Total | Eliminations
Revenue from External Customer [Line Items]
Net sales	(59,000)		(44,000)		(155,000)		(120,000)
Total | Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	6,671,000		5,945,000		18,822,000		14,933,000
Total | Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	$ 56,000		$ 62,000		$ 158,000		$ 167,000

[1] For the third quarter of fiscal 2020, the Company recorded $273.2 million within Net sales in its wholesale reportable segment attributable to discontinued operations inter-company product purchases from its Retail operating segment, which it expects will continue subsequent to the sale of certain retail banners.

[2] For the third quarter of fiscal 2019, the Company recorded $227.1 million within Net sales in its wholesale reportable segment attributable to discontinued operations inter-company product purchases from its Retail operating segment, which it expects will continue subsequent to the sale of certain retail banners.

[3] For fiscal 2020 year-to-date, the Company recorded $756.9 million within Net sales in its wholesale reportable segment attributable to discontinued operations inter-company product purchases from its Retail operating segment, which it expects will continue subsequent to the sale of certain retail banners.

[4] For fiscal 2019 year-to-date, the Company recorded $505.5 million within Net sales in its wholesale reportable segment attributable to discontinued operations inter-company product purchases from its Retail operating segment, which it expects will continue subsequent to the sale of certain retail banners.

[5] During the first quarter of fiscal 2020, the presentation of net sales by customer channel was adjusted to reflect reclassification of customer types resulting from management’s determination that a customer serviced by both legacy Supervalu and UNFI should be classified as a Supermarket customer given that customer’s operations. During the second quarter of fiscal 2020, the presentation of net sales by customer channel was adjusted to reflect conventional military sales within Other instead of Independents based on management’s determination to better reflect the focus of its ongoing business and the definition of customer channels above. There was no impact to the Condensed Consolidated Statements of Operations as a result of the reclassification of customer types. As a result of these adjustments, net sales to the Company’s Supermarkets channel for the third quarter of fiscal 2019 and for fiscal 2019 year-to-date increased approximately $26 million and $77 million, respectively, compared to the previously reported amounts, while net sales to the Other channel for the third quarter of fiscal 2019 and for fiscal 2019 year-to-date increased $96 million and $213 million, respectively, compared to previously reported amounts. Net sales to the Company’s Independents channel for the third quarter of fiscal 2019 and fiscal 2019 year-to-date decreased $122 million and $290 million, respectively, compared to the previously reported amounts.