v3.25.2
Cover Page - shares
3 Months Ended
Aug. 24, 2025
Sep. 10, 2025
May 25, 2025
Cover [Abstract]      
Document Type 10-Q    
Document Quarterly Report true    
Amendment Flag false    
Entity Central Index Key 0000040704    
Document Period End Date Aug. 24, 2025    
Document Transition Report false    
Document Fiscal Period Focus Q1    
Document Fiscal Year Focus 2026    
Current Fiscal Year End Date --05-31    
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   533,416,422  
Shares held in the treasury 219,900,000 221,196,906 212,200,000
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    
3.650% Notes due 2030 [Member]      
Entity Listings [Line Items]      
Security 12b Title 3.650% Notes due 2030    
Trading Symbol GIS 30A    
Security Exchange Name NYSE    
3.600% Notes due 2032 [Member]      
Entity Listings [Line Items]      
Security 12b Title 3.600% Notes due 2032    
Trading Symbol GIS 32    
Security Exchange Name NYSE    
3.850% Notes due 2034 [Member]      
Entity Listings [Line Items]      
Security 12b Title 3.850% Notes due 2034    
Trading Symbol GIS 34    
Security Exchange Name NYSE