Note 15 - Business Segments and Related Information - Segment Reporting Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Aug. 27, 2023	Aug. 28, 2022
Net sales	$ 2,904.0	$ 2,904.3
Operating profit	525.7	62.2
Equity method investment earnings	35.5	49.2
General corporate expense	36.7	83.5
Pension and postretirement non-service expense (income)	0.3	(6.1)
Interest expense, net	(106.0)	(97.1)
Income tax expense	98.3	14.4
Net income (loss)	319.9	(77.5)
Less: Net income attributable to noncontrolling interests	0.2	0.0
Net of tax	319.7	(77.5)
Grocery And Snacks [Member]
Net sales	1,202.9	1,188.3
Operating profit	258.7	250.4
Refrigerated And Frozen [Member]
Net sales	1,151.6	1,207.6
Operating profit	199.2	(216.3)
International [Member]
Net sales	260.2	233.5
Operating profit	23.7	26.9
Foodservice [Member]
Net sales	289.3	274.9
Operating profit	44.1	1.2
Frozen [Member]
Net sales	948.4	1,008.4
Other Shelf-stable [Member]
Net sales	696.8	690.1
Refrigerated [Member]
Net sales	203.2	199.2
Snacks [Member]
Net sales	506.1	498.2
Foodservice [Member]
Net sales	289.3	274.9
International [Member]
Net sales	$ 260.2	$ 233.5