Note 14 - Business Segments and Related Information - Presentation of Derivative Gain (Losses) from Economic Hedges of Forecasted Cash Flows in Segment Results (Details) - Cash Flow Hedging [Member] - Designated as Hedging Instrument [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 27, 2022	Nov. 28, 2021	Nov. 27, 2022	Nov. 28, 2021
Net derivative gains (losses)	$ 5.2	$ 7.0	$ 14.7	$ 17.2
Operating Segments [Member]
Net derivative gains (losses)	7.6	8.8	16.6	13.8
Operating Segments [Member] | Grocery And Snacks [Member]
Net derivative gains (losses)	2.5	4.7	7.5	7.9
Operating Segments [Member] | Refrigerated And Frozen [Member]
Net derivative gains (losses)	4.3	4.6	7.6	9.3
Operating Segments [Member] | International [Member]
Net derivative gains (losses)	0.6	(0.7)	0.7	(3.9)
Operating Segments [Member] | Foodservice [Member]
Net derivative gains (losses)	0.2	0.2	0.8	0.5
Segment Reconciling Items [Member]
Net derivative gains (losses)	$ (2.4)	$ (1.8)	$ (1.9)	$ 3.4