Note 15 - Business Segments and Related Information - Segment Reporting Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 28, 2022	Aug. 29, 2021
Net sales	$ 2,904.3	$ 2,653.3
Operating profit	62.2	427.9
Equity method investment earnings	49.2	20.2
General corporate expense	83.5	64.6
Pension and postretirement non-service income	6.1	16.1
Interest expense, net	97.1	94.2
Income tax expense	14.4	69.7
Net income (loss)	(77.5)	235.7
Less: Net income attributable to noncontrolling interests	0.0	0.3
Net of tax	(77.5)	235.4
Grocery And Snacks [Member]
Net sales	1,188.3	1,075.1
Operating profit	250.4	215.9
Refrigerated And Frozen [Member]
Net sales	1,207.6	1,101.8
Operating profit	(216.3)	157.6
International [Member]
Net sales	233.5	236.6
Operating profit	26.9	34.1
Foodservice [Member]
Net sales	274.9	239.8
Operating profit	1.2	20.3
Frozen [Member]
Net sales	1,008.4	920.4
Other Shelf-stable [Member]
Net sales	690.1	641.6
Refrigerated [Member]
Net sales	199.2	181.4
Snacks [Member]
Net sales	498.2	433.5
Foodservice [Member]
Net sales	274.9	239.8
International [Member]
Net sales	$ 233.5	$ 236.6