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Retirement Plans (Accumulated Benefit Obligations In Excess Of Plan Assets) (Details) (USD $)
In Millions, unless otherwise specified
May 25, 2014
May 26, 2013
Compensation and Retirement Disclosure [Abstract]    
Accumulated benefit obligation for all pension plans $ 283.3 $ 267.6
Pension plans with accumulated benefit obligations in excess of plan assets:    
Accumulated benefit obligation 283.3 267.6
Fair value of plan assets 243.9 234.1
Projected benefit obligations for all plans with projected benefit obligations in excess of plan assets $ 283.9 $ 276.8