v3.25.2
Retirement Benefits and Postemployment Benefits (Summarized Financial Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
May 25, 2025
May 26, 2024
May 28, 2023
Defined Benefit Pension Plans [Member]      
Defined Benefit Plan, Change in Fair Value of Plan Assets Roll Forward [Abstract]      
Fair value at beginning of year $ 5,439.7 $ 5,778.6  
Actual return on assets 188.6 (23.2)  
Employer contributions 30.7 30.0  
Plan participant contributions 2.4 2.0  
Benefits payments (349.5) (349.5)  
Foreign currency 5.3 1.8  
Fair value at end of year 5,317.2 5,439.7 $ 5,778.6
Defined Benefit Plan, Change in Projected Benefit Obligation Roll Forward [Abstract]      
Benefit obligation at beginning of year 5,801.7 5,970.7  
Service cost 51.8 56.8 70.3
Interest cost 306.9 296.5 258.5
Plan amendment 0.4 1.2  
Curtailment/other 0.0 (13.9)  
Plan participant contributions 2.4 2.0  
Medicare Part D reimbursements 0.0 0.0  
Actuarial (gain) loss (191.4) (174.4)  
Benefits payments (349.5) (339.1)  
Foreign currency 5.2 1.9  
Projected benefit obligation at end of year 5,627.5 5,801.7 5,970.7
Plan assets (less) more than benefit obligation as of fiscal year end (310.3) (362.0)  
Other Postretirement Benefit Plans [Member]      
Defined Benefit Plan, Change in Fair Value of Plan Assets Roll Forward [Abstract]      
Fair value at beginning of year 463.2 456.0  
Actual return on assets 35.7 45.6  
Employer contributions 0.1 0.1  
Plan participant contributions 6.6 6.4  
Benefits payments (47.6) (44.9)  
Foreign currency 0.0 0.0  
Fair value at end of year 458.0 463.2 456.0
Defined Benefit Plan, Change in Projected Benefit Obligation Roll Forward [Abstract]      
Benefit obligation at beginning of year 403.0 430.6  
Service cost 4.3 4.7 5.1
Interest cost 21.1 21.3 17.9
Plan amendment 0.0 0.0  
Curtailment/other 0.0 0.0  
Plan participant contributions 6.6 6.4  
Medicare Part D reimbursements 0.0 0.0  
Actuarial (gain) loss (48.1) (14.1)  
Benefits payments (49.0) (45.7)  
Foreign currency (0.5) (0.2)  
Projected benefit obligation at end of year 337.4 403.0 430.6
Plan assets (less) more than benefit obligation as of fiscal year end 120.6 60.2  
Postemployment Benefit Plans [Member]      
Defined Benefit Plan, Change in Projected Benefit Obligation Roll Forward [Abstract]      
Benefit obligation at beginning of year 129.0 131.0  
Service cost 7.0 7.4 8.4
Interest cost 4.0 4.0 3.1
Plan amendment 0.0 (9.6)  
Curtailment/other 8.1 10.2  
Plan participant contributions 0.0 0.0  
Medicare Part D reimbursements 0.0 0.0  
Actuarial (gain) loss (2.1) 10.3  
Benefits payments (22.9) (24.3)  
Foreign currency 0.0 0.0  
Projected benefit obligation at end of year 123.1 129.0 $ 131.0
Plan assets (less) more than benefit obligation as of fiscal year end $ (123.1) $ 129.0