Note 2 - Restructuring Activities (Details Textual) - Conagra Restructuring Plan [Member] - USD ($) $ in Millions	3 Months Ended		63 Months Ended
	Aug. 27, 2023	Aug. 28, 2022	Aug. 27, 2023
Restructuring And Related Cost, Approved For Incurrence	$ 228.5		$ 228.5
Restructuring And Related Cost, Approved For Incurrence, Cash	69.2		69.2
Restructuring And Related Cost, Approved For Incurrence, Noncash	159.3		159.3
Restructuring and Related Cost, Incurred Cost	23.8	$ 4.1	176.7
Restructuring And Related Cost Expected, Cash Outflows	4.9
Restructuring and Related Cost, Expected Cost, Noncash	$ 18.9		$ 18.9