v3.25.2
Retirement Benefits and Postemployment Benefits (Schedule of Allocation of Plan Assets, Including Fair Value Hierarchy Levels and Weighted-Average Target Asset Allocations 1) (Details) - USD ($)
$ in Millions
May 25, 2025
May 26, 2024
May 28, 2023
Defined Benefit Pension Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets $ 5,317.2 $ 5,439.7 $ 5,778.6
Defined Benefit Pension Plans [Member] | Equity [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 584.4 617.3  
Defined Benefit Pension Plans [Member] | Fixed income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 3,548.9 3,511.4  
Defined Benefit Pension Plans [Member] | Real asset investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 59.7 82.6  
Defined Benefit Pension Plans [Member] | Other investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.1 0.1  
Defined Benefit Pension Plans [Member] | Cash and accruals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 137.3 158.4  
Defined Benefit Pension Plans [Member] | Assets measured at net asset value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 986.8 1,069.9  
Defined Benefit Pension Plans [Member] | Fair value measurement of pension plan assets in the fair value hierarchy [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 4,330.4 4,369.8  
Defined Benefit Pension Plans [Member] | Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 1,927.2 1,963.8  
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Equity [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 200.6 225.9  
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Fixed income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 1,529.7 1,497.0  
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Real asset investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 59.7 82.6  
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Other investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans [Member] | Level 1 [Member] | Cash and accruals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 137.2 158.3  
Defined Benefit Pension Plans [Member] | Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 2,403.1 2,405.9  
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Equity [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 383.8 391.4  
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Fixed income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 2,019.2 2,014.4  
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Real asset investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Other investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans [Member] | Level 2 [Member] | Cash and accruals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.1 0.1  
Defined Benefit Pension Plans [Member] | Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.1 0.1  
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Equity [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Fixed income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Real asset investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Other investments [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.1 0.1  
Defined Benefit Pension Plans [Member] | Level 3 [Member] | Cash and accruals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 458.0 463.2 $ 456.0
Other Postretirement Benefit Plans [Member] | Fixed income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 90.5 95.1  
Other Postretirement Benefit Plans [Member] | Cash and accruals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 33.7 24.9  
Other Postretirement Benefit Plans [Member] | Assets measured at net asset value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 333.8 343.2  
Other Postretirement Benefit Plans [Member] | Fair value measurement of pension plan assets in the fair value hierarchy [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 124.2 120.0  
Other Postretirement Benefit Plans [Member] | Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 124.2 120.0  
Other Postretirement Benefit Plans [Member] | Level 1 [Member] | Fixed income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 90.5 95.1  
Other Postretirement Benefit Plans [Member] | Level 1 [Member] | Cash and accruals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 33.7 24.9  
Other Postretirement Benefit Plans [Member] | Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans [Member] | Level 2 [Member] | Fixed income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans [Member] | Level 2 [Member] | Cash and accruals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans [Member] | Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans [Member] | Level 3 [Member] | Fixed income [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets 0.0 0.0  
Other Postretirement Benefit Plans [Member] | Level 3 [Member] | Cash and accruals [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value measurement of pension plan assets $ 0.0 $ 0.0