This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

INVESTMENTS IN JOINT VENTURES - General Information (Details) - USD ($) $ in Millions	Feb. 28, 2021	Nov. 30, 2020	May 31, 2020
Equity Method Investments
Equity method investments	$ 303.1		$ 250.2
Lamb-Weston Meijer v.o.f.
Equity Method Investments
Ownership interest (as a percent)	50.00%
Lamb-Weston RDO Frozen
Equity Method Investments
Ownership interest (as a percent)	50.00%
Lamb Weston Alimentos Modernos S.A.
Equity Method Investments
Ownership interest (as a percent)	50.00%
Lamb-Weston Meijer v.o.f. \| Russian Joint Venture
Equity Method Investments
Ownership interest (as a percent)		35.50%