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ACQUISITIONS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended			6 Months Ended
	Jan. 26, 2019	Oct. 22, 2018	Jan. 26, 2019	Oct. 27, 2018	Jan. 27, 2018	Jan. 26, 2019	Jan. 27, 2018	Jul. 28, 2018
Business Acquisition [Line Items]
Goodwill	$ 481,095		$ 481,095			$ 481,095		$ 362,495
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01			$ 0.01		$ 0.01
Net sales			$ 3,700,000	$ 3,470,000
Supervalu
Business Acquisition [Line Items]
Goodwill		$ 347,485
Business Acquisition, Share Price		$ 32.50
Business Combination, Consideration Transferred	$ 2,292,467	$ 2,292,467
Payments for business acquisitions		1,300,000
Less: assumed equity award liabilities		$ 1,000,000
Net sales					$ 6,159,106	$ 12,134,176,000	$ 12,056,161,000
Supervalu
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)		$ 0.01
Discontinued Operations [Member]
Business Acquisition [Line Items]
Goodwill		$ 0

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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