Earnings Per Share (Schedule Of Basic And Diluted EPS And Stock Options And Restricted Units Not Dilutive) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Aug. 25, 2024	Aug. 27, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net earnings attributable to General Mills	$ 579.9	$ 673.5
Average number of common shares - basic EPS	560.5	586.3
Average number of common shares - diluted EPS	563.8	591.4
Earnings per share - basic	$ 1.03	$ 1.15
Earnings per share - diluted	$ 1.03	$ 1.14
Other Disclosures [Abstract]
Anti-dilutive stock options, restricted stock units, and performance share units	4.4	1.6
Stock options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental share effect	1.5	2.8
Restricted stock units and performance share units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental share effect	1.8	2.3