EQUITY METHOD INVESTMENTS - Carrying Amounts (Details) - USD ($) $ in Millions	May 29, 2022	May 30, 2021
Equity Method Investments
Equity method investments	$ 257.4	$ 310.2
Lamb-Weston Meijer v.o.f.
Equity Method Investments
Equity method investments	$ 211.2	$ 263.3
Equity method investment, ownership interest (as a percent)	50.00%	50.00%
Lamb Weston Alimentos Modernos S.A.
Equity Method Investments
Equity method investments	$ 26.1	$ 28.8
Equity method investment, ownership interest (as a percent)	50.00%	50.00%
Lamb-Weston RDO Frozen
Equity Method Investments
Equity method investments	$ 19.4	$ 17.4
Equity method investment, ownership interest (as a percent)	50.00%	50.00%
Other
Equity Method Investments
Equity method investments	$ 0.7	$ 0.7
Equity method investment, ownership interest (as a percent)	50.00%	50.00%