Cover Page - shares	6 Months Ended
	Nov. 26, 2023	Dec. 13, 2023	May 28, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Amendment Flag	false
Entity Central Index Key	0000040704
Document Period End Date	Nov. 26, 2023
Document Transition Report	false
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--05-26
Entity File Number	001-01185
Entity Registrant Name	GENERAL MILLS, INC.
Entity Incorporation State Country Code	DE
Entity Tax Identification Number	41-0274440
Entity Address Address Line 1	Number One General Mills Boulevard
Entity Address City or Town	Minneapolis
Entity Address State or Province	MN
Entity Address Postal Zip Code	55426
City Area Code	(763)
Local Phone Number	764-7600
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		567,890,100
Shares held in the treasury	185,700,000	186,723,228	168,000,000.0
Common Stock, $.10 par value [Member]
Entity Listings [Line Items]
Security 12b Title	Common Stock, $.10 par value
Trading Symbol	GIS
Security Exchange Name	NYSE
0.125% Notes due 2025 [Member]
Entity Listings [Line Items]
Security 12b Title	0.125% Notes due 2025
Trading Symbol	GIS 25A
Security Exchange Name	NYSE
0.450% Notes due 2026 [Member]
Entity Listings [Line Items]
Security 12b Title	0.450% Notes due 2026
Trading Symbol	GIS 26
Security Exchange Name	NYSE
1.500% Notes due 2027 [Member]
Entity Listings [Line Items]
Security 12b Title	1.500% Notes due 2027
Trading Symbol	GIS 27
Security Exchange Name	NYSE
3.907% Notes due 2029 [Member]
Entity Listings [Line Items]
Security 12b Title	3.907% Notes due 2029
Trading Symbol	GIS 29
Security Exchange Name	NYSE