Note 9 - Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Nov. 26, 2023	Aug. 27, 2023	Nov. 27, 2022	Aug. 28, 2022	Nov. 26, 2023	Nov. 27, 2022
Net income attributable to Conagra Brands, Inc. common stockholders:	$ 286.2	$ 319.7	$ 381.9	$ (77.5)	$ 605.9	$ 304.4
Basic weighted average shares outstanding (in shares)	478.7		479.4		478.4	480.0
Add: Dilutive effect of stock options, restricted stock unit awards, and other dilutive securities (in shares)	1.1		1.5		1.4	1.6
Diluted weighted average shares outstanding (in shares)	479.8		480.9		479.8	481.6