EARNINGS PER SHARE - Schedule of basic and diluted earnings per share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Aug. 24, 2025	Aug. 25, 2024
EARNINGS PER SHARE
Net income attributable to Conagra Brands, Inc.	$ 164.5	$ 466.8
Basic weighted average shares outstanding (in shares)	478.7	478.8
Add: Dilutive effect of stock options, restricted stock unit awards, and other dilutive securities	0.9	1.5
Diluted weighted average shares outstanding (in shares)	479.6	480.3