BUSINESS SEGMENTS (Details) $ in Thousands	3 Months Ended				9 Months Ended
	Apr. 27, 2019 USD ($)		Apr. 28, 2018 USD ($)		Apr. 27, 2019 USD ($) segment		Apr. 28, 2018 USD ($)
Business segment information
Number of Operating Segments | segment					3
Net sales	$ 5,962,620	[1]	$ 2,648,879	[2]	$ 14,979,982	[3]	$ 7,634,435	[2]
Goodwill and asset impairment charges	(38,250)				332,621		11,242
Restructuring, acquisition, and integration related expenses	19,438		151		134,567		151
Operating income (loss)	69,681		82,157		(357,292)		177,468
Total other expense, net	44,934		4,323		98,689		10,755
Income before income taxes	24,747		77,834		(455,981)		166,713
Depreciation and amortization	71,787		21,733		169,780		65,982
Capital expenditures	56,816		14,111		136,953		29,646
Total assets of continuing operations	6,786,557		3,078,846		6,786,557		3,078,846
Operating Segments
Business segment information
Net sales
Operating Segments | Wholesale
Business segment information
Net sales	5,943,928	[1]	2,633,024	[2]	14,931,170	[3]	7,592,352	[2]
Goodwill and asset impairment charges	(38,250)				332,621		67
Restructuring, acquisition, and integration related expenses	0		0		4		0
Operating income (loss)	131,888		86,633		(120,083)		200,530
Income before income taxes	0		0		0		0
Depreciation and amortization	63,348		21,261		149,201		64,237
Capital expenditures	56,655		13,694		136,065		27,297
Total assets of continuing operations	6,403,512		2,935,420		6,403,512		2,935,420
Operating Segments | Other
Business segment information
Net sales	62,503		62,158	[2]	169,116	[3]	175,083	[2]
Goodwill and asset impairment charges	0				0		11,175
Restructuring, acquisition, and integration related expenses	19,438		151		134,563		151
Operating income (loss)	(60,024)		(3,984)		(233,961)		(25,124)
Income before income taxes	0		0		0		0
Depreciation and amortization	8,439		472		20,579		1,745
Capital expenditures	161		417		888		2,349
Total assets of continuing operations	423,663		184,301		423,663		184,301
Eliminations
Business segment information
Net sales	(43,811)		(46,303)		(120,304)		(133,000)
Goodwill and asset impairment charges	0				0		0
Restructuring, acquisition, and integration related expenses	0		0		0		0
Operating income (loss)	(2,183)		(492)		(3,248)		2,062
Income before income taxes	0		0		0		0
Depreciation and amortization	0		0		0		0
Capital expenditures	0		0		0		0
Total assets of continuing operations	(40,618)		(40,875)		(40,618)		(40,875)
Unallocated (Income)/Expenses
Business segment information
Net sales	0	[1]	0		0		0
Goodwill and asset impairment charges	0				0		0
Restructuring, acquisition, and integration related expenses	0		0		0		0
Operating income (loss)	0		0		0		0
Total other expense, net	44,934		4,323		98,689		10,755
Income before income taxes	0		0		0		0
Depreciation and amortization	0		0		0		0
Capital expenditures	0		0		0		0
Total assets of continuing operations	0		$ 0		0		$ 0
Discontinued Operations [Member] | Operating Segments | Wholesale
Business segment information
Net sales	$ 233,400				$ 520,400

[1] For the third quarter of fiscal 2019, the Company recorded $233.4 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] During the second quarter of fiscal 2019, the presentation of net sales by customer channel was adjusted to reflect changes in the classification of customer types as a result of a detailed review of customer channel definitions. There was no impact to the Condensed Consolidated Statements of Income as a result of revising the classification of customer types. As a result of this adjustment, net sales to our supermarkets channel and to our other channel for the third quarter of fiscal 2018 decreased approximately $12 million and $13 million, respectively, compared to the previously reported amounts, while net sales to the independents channel for the third quarter of fiscal 2018 increased approximately $25 million compared to the previously reported amounts. In addition, net sales to our supermarkets channel and to our other channel for the 39-week period ended April 28, 2018 decreased approximately $32 million and $45 million, respectively, compared to the previously reported amounts, while net sales to the independents channel for the 39-week period ended April 28, 2018 increased approximately $77 million compared to the previously reported amounts.

[3] During the second quarter of fiscal 2019, the presentation of net sales attributable to Supervalu was incorporated into our definitions of sales by customer channel. There was no impact to the Condensed Consolidated Statements of Income as a result of revising the classification of customer types. Net sales as reported in the first quarter of fiscal 2019 by customer channel were recast, resulting in an increase in supermarket sales of $198 million, independents of $25 million, and other of $1 million with an offsetting decrease to the Supervalu customer channel.