REVENUE RECOGNITION REVENUE RECOGNITION - Disaggregation of Revenues (Details) - USD ($) $ in Thousands	3 Months Ended					6 Months Ended
	Feb. 01, 2020		Nov. 02, 2019	Jan. 26, 2019		Feb. 01, 2020		Jan. 26, 2019
Revenue from External Customer [Line Items]
Net sales	$ 6,137,604			$ 6,149,206		$ 12,157,189		$ 9,017,362
Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	6,144,381	[1]		6,131,418	[2]	12,151,476	[3]	8,988,384	[4]
Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	38,267			56,717		102,016		105,471
Supermarkets
Revenue from External Customer [Line Items]
Net sales	3,879,000			3,928,000	[5]	7,648,000		4,858,000	[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	3,879,000			3,928,000	[5]	7,648,000		4,858,000	[5]
Net sales adjustment				26,000				51,000
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	1,210,000			1,100,000		2,321,000		2,127,000
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	1,210,000			1,100,000		2,321,000		2,127,000	[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	631,000			675,000	[5]	1,299,000	[5]	1,334,000	[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	631,000			675,000	[5]	1,299,000	[5]	1,334,000
Net sales adjustment			$ (90,000)	(135,000)				(168,000)
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	418,000			446,000	[5]	889,000	[5]	698,000	[5]
Other | Eliminations
Revenue from External Customer [Line Items]
Net sales	(45,000)			(39,000)		(96,000)		(76,000)
Other | Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	425,000			428,000	[5]	883,000	[5]	668,000	[5]
Net sales adjustment			$ 90,000	109,000				117,000
Other | Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	38,000			57,000	[5]	102,000		106,000	[5]
Total
Revenue from External Customer [Line Items]
Net sales	6,138,000			6,149,000		12,157,000		9,017,000
Total | Eliminations
Revenue from External Customer [Line Items]
Net sales	(45,000)			(39,000)		(96,000)		(76,000)
Total | Wholesale | Operating Segments
Revenue from External Customer [Line Items]
Net sales	6,145,000			6,131,000		12,151,000		8,987,000
Total | Other | Operating Segments
Revenue from External Customer [Line Items]
Net sales	$ 38,000			$ 57,000		$ 102,000		$ 106,000

[1] For the second quarter of fiscal 2020, the Company recorded $251.5 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.

[2] For the second quarter of fiscal 2019, the Company recorded $265.2 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.

[3] For fiscal 2020 year-to-date, the Company recorded $496.1 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.

[4] For fiscal 2019 year-to-date, the Company recorded $287.0 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 Supervalu and legacy 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 second quarter of fiscal 2019 and for fiscal 2019 year-to-date increased approximately $26 million and $51 million, respectively, compared to the previously reported amounts, while net sales to the Other channel for the second quarter of fiscal 2019 and for fiscal 2019 year-to-date increased $109 million and $117 million, respectively, compared to previously reported amounts. Net sales to the Company’s Independents channel for the second quarter of fiscal 2019 and fiscal 2019 year-to-date decreased $135 million and $168 million, respectively, compared to the previously reported amounts. In addition, net sales to the Company’s Other channel for the first quarter of fiscal 2020 increased $90 million compared to the previously reported amounts, with an offsetting elimination to the Independents channel.