v3.26.1
RETIREMENT BENEFITS AND POSTEMPLOYMENT BENEFITS - Schedule of Fair Values of Our Pension and Postretirement Benefit Plans Assets (Details) - USD ($)
$ in Millions
May 31, 2026
May 25, 2025
May 26, 2024
Defined Benefit Pension Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets $ 5,376.4 $ 5,317.2 $ 5,439.7
Defined Benefit Pension Plans | Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 576.2 584.4  
Defined Benefit Pension Plans | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 3,744.4 3,548.9  
Defined Benefit Pension Plans | Real assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 55.6 59.7  
Defined Benefit Pension Plans | Other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.1 0.1  
Defined Benefit Pension Plans | Cash and accruals      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 96.7 137.3  
Defined Benefit Pension Plans | Fair value measurement of pension plan assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 903.4 986.8  
Defined Benefit Pension Plans | Total Assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 4,473.0 4,330.4  
Defined Benefit Pension Plans | Level 1 | Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 200.3 200.6  
Defined Benefit Pension Plans | Level 1 | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 1,476.4 1,529.7  
Defined Benefit Pension Plans | Level 1 | Real assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 55.6 59.7  
Defined Benefit Pension Plans | Level 1 | Other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans | Level 1 | Cash and accruals      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 96.6 137.2  
Defined Benefit Pension Plans | Level 1 | Fair value measurement of pension plan assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 1,828.9 1,927.2  
Defined Benefit Pension Plans | Level 2 | Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 375.9 383.8  
Defined Benefit Pension Plans | Level 2 | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 2,268.0 2,019.2  
Defined Benefit Pension Plans | Level 2 | Real assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans | Level 2 | Other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans | Level 2 | Cash and accruals      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.1 0.1  
Defined Benefit Pension Plans | Level 2 | Fair value measurement of pension plan assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 2,644.0 2,403.1  
Defined Benefit Pension Plans | Level 3 | Equity      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans | Level 3 | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans | Level 3 | Real assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans | Level 3 | Other investments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.1 0.1  
Defined Benefit Pension Plans | Level 3 | Cash and accruals      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans | Level 3 | Fair value measurement of pension plan assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.1 0.1  
Other Postretirement Benefit Plans      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 481.7 458.0 $ 463.2
Other Postretirement Benefit Plans | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 87.1 90.5  
Other Postretirement Benefit Plans | Cash and accruals      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 40.0 33.7  
Other Postretirement Benefit Plans | Fair value measurement of pension plan assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 354.6 333.8  
Other Postretirement Benefit Plans | Total Assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 127.1 124.2  
Other Postretirement Benefit Plans | Level 1 | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 87.1 90.5  
Other Postretirement Benefit Plans | Level 1 | Cash and accruals      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 40.0 33.7  
Other Postretirement Benefit Plans | Level 1 | Fair value measurement of pension plan assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 127.1 124.2  
Other Postretirement Benefit Plans | Level 2 | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans | Level 2 | Cash and accruals      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans | Level 2 | Fair value measurement of pension plan assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans | Level 3 | Fixed income      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans | Level 3 | Cash and accruals      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans | Level 3 | Fair value measurement of pension plan assets      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets $ 0.0 $ 0.0