v3.26.1
RETIREMENT BENEFITS AND POSTEMPLOYMENT BENEFITS - Narrative (Details) - USD ($)
shares in Millions
 12 Months Ended
May 31, 2026
May 25, 2025
May 26, 2024
Defined Benefit Plan Disclosure [Line Items]      
Health care cost trend rate for next year 7.70% 7.90%  
Rate to which the cost trend rate is assumed to decline (ultimate rate) 4.50% 4.50%  
Accumulated benefit obligation $ 5,605,600,000 $ 5,540,200,000  
Transfers into or out of level 3 investments 0 0  
Net assets of money purchase plan 20,100,000    
Recognized expense 97,600,000 $ 96,100,000 $ 94,000,000.0
Disposal Group, Held-for-Sale, Not Discontinued Operations | Brazil Business      
Defined Benefit Plan Disclosure [Line Items]      
Other liabilities $ 20,500,000    
General Mills Savings Plan      
Defined Benefit Plan Disclosure [Line Items]      
ESOP number of allocated shares 2.9 3.2  
Common stock held by ESOP and company stock fund $ 172,600,000 $ 292,700,000  
Defined Benefit Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions 31,600,000 30,700,000  
Expected contributions next fiscal year 0    
Accumulated benefit obligation 446,400,000 440,100,000  
Benefit obligation $ 5,659,100,000 5,627,500,000 5,801,700,000
Defined Benefit Pension Plans | United States equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 8.00%    
Defined Benefit Pension Plans | International equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 4.00%    
Defined Benefit Pension Plans | Private equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 7.00%    
Defined Benefit Pension Plans | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 73.00%    
Defined Benefit Pension Plans | Real assets      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 8.00%    
Other Postretirement Benefit Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions $ 100,000 100,000  
Expected contributions next fiscal year 0    
Accumulated benefit obligation 4,900,000 9,400,000  
Benefit obligation 315,600,000 337,400,000 403,000,000.0
Other Postretirement Benefit Plans | Disposal Group, Held-for-Sale, Not Discontinued Operations | Brazil Business      
Defined Benefit Plan Disclosure [Line Items]      
Other liabilities $ 4,300,000    
Other Postretirement Benefit Plans | United States equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 23.00%    
Other Postretirement Benefit Plans | International equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 12.00%    
Other Postretirement Benefit Plans | Private equities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 5.00%    
Other Postretirement Benefit Plans | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation (as a percent) 60.00%    
Postemployment Benefit Plans      
Defined Benefit Plan Disclosure [Line Items]      
Expected contributions next fiscal year $ 0    
Benefit obligation 117,800,000 123,100,000 $ 129,000,000.0
United States | Defined Benefit Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions $ 0 0  
Termination period (in years) 5 years    
United States | Other Postretirement Benefit Plans      
Defined Benefit Plan Disclosure [Line Items]      
Employer contributions $ 0 $ 0