Note 2 - Restructuring Activities (Details Textual) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		48 Months Ended
	Nov. 27, 2022	Aug. 28, 2022	Nov. 28, 2021	Nov. 27, 2022	Nov. 28, 2021	Nov. 27, 2022
Restructuring and Related Cost, Expected Cost, Total	$ 152.0			$ 152.0		$ 152.0
Restructuring and Related Cost, Incurred Cost				0.6
Conagra Restructuring Plan [Member]
Restructuring And Related Cost, Approved For Incurrence	184.0			184.0		184.0
Restructuring And Related Cost, Approved For Incurrence, Cash	57.2			57.2		57.2
Restructuring And Related Cost, Approved For Incurrence, Noncash	126.8			126.8		126.8
Restructuring and Related Cost, Expected Cost, Total	152.6			152.6		152.6
Restructuring And Related Cost Incurred Or Expected, Cash Outflows From Inception	50.7			50.7		50.7
Restructuring and Related Cost, Expected Cost, Noncash	101.9			101.9		101.9
Restructuring and Related Cost, Incurred Cost	1.8		$ 6.6	5.9	$ 15.1	148.1
Restructuring And Related Cost Expected. Cash Outflows				46.1
Restructuring And Related Cost Expected, Noncash Charges				102.0
Pinnacle Integration Restructuring Plan [Member]
Restructuring And Related Cost Incurred Or Expected, Cash Outflows From Inception	283.6			283.6		283.6
Restructuring and Related Cost, Expected Cost, Noncash	28.0			28.0		28.0
Restructuring and Related Cost, Incurred Cost		$ 0.8	$ 5.8		$ 13.1	294.1
Restructuring And Related Cost Expected. Cash Outflows	1.8			6.0
Restructuring And Related Cost Expected, Noncash Charges				0.1
Restructuring and Related Cost, Expected Cost, Cash	$ 266.1			266.1		266.1
Restructuring And Related Cost Incurred, Noncash Charges From Inception				344.8
Restructuring And Related Cost Incurred Or Expected, Non-cash Charges From Inception				$ 61.2
Pinnacle Integration Restructuring Plan [Member] | Cost of Sales [Member]
Restructuring and Related Cost, Incurred Cost						12.8
Pinnacle Integration Restructuring Plan [Member] | Selling, General and Administrative Expenses [Member]
Restructuring and Related Cost, Incurred Cost						$ 281.3