v3.26.1
RETIREMENT BENEFITS AND POSTEMPLOYMENT BENEFITS - Schedule of Components of Net Periodic Benefit Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
May 31, 2026
May 25, 2025
May 26, 2024
Defined Benefit Pension Plans      
Components of Net Periodic Benefit Cost [Abstract]      
Service cost $ 42.2 $ 51.8 $ 56.8
Interest cost 291.5 306.9 296.5
Expected return on plan assets (405.3) (420.1) (417.7)
Amortization of losses (gains) 108.7 100.4 86.5
Amortization of prior service costs (credits) 1.2 1.4 1.8
Other adjustments 0.0 0.0 0.0
Settlement or curtailment loss (gain) 6.7 0.0 (4.0)
Net expense (income) 45.0 40.4 19.9
Other Postretirement Benefit Plans      
Components of Net Periodic Benefit Cost [Abstract]      
Service cost 2.3 4.3 4.7
Interest cost 16.4 21.1 21.3
Expected return on plan assets (33.6) (35.9) (34.7)
Amortization of losses (gains) (25.9) (20.5) (20.4)
Amortization of prior service costs (credits) (21.2) (22.1) (21.8)
Other adjustments 0.0 0.0 0.0
Settlement or curtailment loss (gain) (0.5) 0.0 0.0
Net expense (income) (62.5) (53.1) (50.9)
Postemployment Benefit Plans      
Components of Net Periodic Benefit Cost [Abstract]      
Service cost 6.9 7.0 7.4
Interest cost 3.5 4.0 4.0
Expected return on plan assets 0.0 0.0 0.0
Amortization of losses (gains) 0.3 0.5 0.1
Amortization of prior service costs (credits) (1.1) (1.6) 0.3
Other adjustments 7.7 11.5 8.3
Settlement or curtailment loss (gain) 0.0 0.0 0.0
Net expense (income) $ 17.3 $ 21.4 $ 20.1