VARIABLE INTEREST ENTITIES (Details) - Loss on lease put option for one building - USD ($) $ in Millions	Aug. 26, 2018	May 27, 2018
Variable Interest Entity [Line Items]
Estimated amount by which put prices exceeded the fair values of the related properties	$ 8.2	$ 8.2
Accrued put cost	$ 1.3	$ 1.2

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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Name:	us-gaap_LossContingencyEstimateOfPossibleLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant