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ACQUISITIONS - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Oct. 22, 2018	Oct. 27, 2018	Jul. 28, 2018	Oct. 28, 2017
Business Acquisition [Line Items]
Goodwill		$ 707,950	$ 362,495	$ 370,811
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01
SUPERVALU [Member]
Business Acquisition [Line Items]
Goodwill	$ 347,485
Business Acquisition, Share Price	$ 32.50
Business Combination, Consideration Transferred	$ 2,300,000
Payments for business acquisitions	1,300,000
Business Combination, Consideration Transferred, Liabilities Incurred	$ 1,000,000
SUPERVALU [Member] | Restructuring, Settlement and Impairment Provisions [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs		$ 25,600
Business Combination, Integration Related Costs		$ 6,300
SUPERVALU [Member]
Business Acquisition [Line Items]
Common stock, par value (in dollars per share)	$ 0.01
Discontinued Operations [Member]
Business Acquisition [Line Items]
Goodwill	$ 45,000

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
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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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