Note 7 - Goodwill and Other Identifiable Intangible Assets - Change in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	May 28, 2023	May 29, 2022
Balance	$ 11,329.2	$ 11,338.9
Currency translation	(9.3)	(9.7)
Impairment	(141.7)
Balance	11,178.2	11,329.2
Grocery And Snacks [Member]
Balance	4,692.4	4,692.4
Currency translation	0.0	0.0
Impairment	0.0
Balance	4,692.4	4,692.4
Refrigerated And Frozen [Member]
Balance	5,611.2	5,611.2
Currency translation	0.0	0.0
Impairment	(141.7)
Balance	5,469.5	5,611.2
International [Member]
Balance	292.8	302.5
Currency translation	(9.3)	(9.7)
Impairment	0.0
Balance	283.5	292.8
Foodservice [Member]
Balance	732.8	732.8
Currency translation	0.0	0.0
Impairment	0.0
Balance	$ 732.8	$ 732.8