INVESTMENTS IN JOINT VENTURES - Equity Method Investments - Agreement - Equity Method Investee Information (Details) - Lamb-Weston Meijer v.o.f. $ in Millions	12 Months Ended
May 31, 2020 USD ($)
Equity Method Investments
ERP costs	$ 13.0
ERP costs, selling, general, and administrative expense	$ 3.0

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