DOCUMENT AND ENTITY INFORMATION - shares	9 Months Ended
	Feb. 25, 2018	Mar. 12, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Document Period End Date	Feb. 25, 2018
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--05-27
Entity Central Index Key	0000040704
Trading Symbol	GIS
Entity Registrant Name	GENERAL MILLS INC,
Entity Filer Category	Large Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well Known Seasoned Issuer	Yes
Entity Common Stock, Shares Outstanding		570,162,724