Risk Management Activities (Schedule Of Unallocated Corporate items) (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 25, 2024	Aug. 27, 2023
Commodity Price Risk [Abstract]
Net (loss) gain on mark-to-market valuation of certain commodity positions	$ (37.7)	$ 28.4
Net loss on commodity positions reclassified from unallocated corporate items to segment operating profit	17.2	3.2
Net mark-to-market revaluation of certain grain inventories	(8.3)	13.3
Net mark-to-market valuation of certain commodity positions recognized in unallocated corporate items	$ (28.8)	$ 44.9