Note 7 - 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. 27, 2022	Aug. 28, 2022	Nov. 28, 2021	Aug. 29, 2021	Nov. 27, 2022	Nov. 28, 2021
Net income attributable to Conagra Brands, Inc. common stockholders:	$ 381.9	$ (77.5)	$ 275.5	$ 235.4	$ 304.4	$ 510.9
Basic weighted average shares outstanding (in shares)	479.4		480.2		480.0	480.3
Add: Dilutive effect of stock options, restricted stock unit awards, and other dilutive securities (in shares)	1.5		1.7		1.6	1.8
Diluted weighted average shares outstanding (in shares)	480.9		481.9		481.6	482.1