EMPLOYEE BENEFIT PLANS AND OTHER POST-RETIREMENT BENEFITS - Funding and Cash Flows - Contributions (Details) - Pension Plans $ in Millions	3 Months Ended
Aug. 26, 2018 USD ($)
Contributions
Employer contributions	$ 0.1
Required minimum contribution reminder of fiscal 2019	$ 0.3

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Name:	us-gaap_DefinedBenefitPlanContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration