SEGMENTS - Variable Interest Entity - Consolidated - Acquisition - Ownership Interest (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Feb. 23, 2020	Feb. 23, 2020	Nov. 02, 2018	Nov. 01, 2018
Lamb Weston BSW, LLC
Ownership interest acquired
Ownership interest acquired (as a percent)			50.01%	50.01%
Ownership interest after completion of the acquisition
Ownership interest after completion of the acquisition (as a percent)			100.00%
Lamb-Weston RDO Frozen
Ownership interest acquired
Loss related to the withdrawal from a multiemployer pension plan	$ 2.6	$ 2.6