v3.26.1
PENSION AND POSTRETIREMENT BENEFITS - Schedule of Changes in Benefit Obligations and Plan Asset (Details) - USD ($)
$ in Millions
12 Months Ended
May 31, 2026
May 25, 2025
May 26, 2024
Pension Plan [Member]      
PENSION AND POSTRETIREMENT BENEFITS      
Benefit obligation at beginning of year $ 1,693.8 $ 2,574.7  
Service cost 5.4 5.5 $ 5.8
Interest cost 87.8 136.1 144.7
Amendments 1.5 0.1  
Actuarial loss (gain) 66.5 (148.6)  
Plan settlements (40.3) (679.4)  
Benefits paid (138.9) (194.6)  
Benefit obligation at end of year 1,675.8 1,693.8 2,574.7
Fair value of plan assets at beginning of year 1,946.8 2,738.9  
Actual return on plan assets 173.5 70.0  
Employer contributions 11.4 11.9  
Plan settlements (40.3) (679.4)  
Benefits paid (138.9) (194.6)  
Fair value of plan assets at end of year 1,952.5 1,946.8 2,738.9
Other Postretirement Benefits Plan [Member]      
PENSION AND POSTRETIREMENT BENEFITS      
Benefit obligation at beginning of year 48.3 48.1  
Service cost 0.1 0.1 0.1
Interest cost 2.2 2.4 2.5
Actuarial loss (gain) (0.4) 4.4  
Benefits paid (5.9) (6.7)  
Benefit obligation at end of year 44.3 48.3 48.1
Fair value of plan assets at beginning of year   3.7  
Actual return on plan assets   (3.7)  
Employer contributions 5.9 6.7  
Benefits paid $ (5.9) $ (6.7)  
Fair value of plan assets at end of year     $ 3.7