ACQUISITIONS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Apr. 27, 2019	Oct. 27, 2018	Oct. 22, 2018	Apr. 27, 2019	Apr. 28, 2018	Apr. 27, 2019	Apr. 28, 2018	Jul. 28, 2018
Business Acquisition [Line Items]
Goodwill	$ 471,843			$ 471,843		$ 471,843		$ 362,495
Common stock, par value (in dollars per share)	$ 0.01			$ 0.01		$ 0.01		$ 0.01
Net sales				$ 3,240,000		$ 6,940,000
Supervalu
Business Acquisition [Line Items]
Goodwill		$ 347,485
Business Acquisition, Share Price			$ 32.50
Business Combination, Consideration Transferred	$ 2,292,241	$ 2,292,467	$ 2,300,000
Payments for business acquisitions			1,300,000
Less: assumed equity award liabilities			$ 1,000,000
Net sales					$ 6,067,869	$ 18,096,796	$ 18,125,148
Supervalu
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)			$ 0.01
Discontinued Operations [Member]
Business Acquisition [Line Items]
Goodwill			$ 0