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Derivative Instruments And Hedging Activities (Notional and Fair Value Of Derivative Contracts Designated And Not Designated As Hedging Instruments) (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
May 26, 2019
May 27, 2018
Derivatives, Fair Value [Line Items]    
Derivative contracts, number of shares outstanding 123.1 123.5
Derivative assets $ 0.1 $ 1.1
Derivative liabilities 0.9 0.0
Equity forwards    
Derivatives, Fair Value [Line Items]    
Derivative assets 0.0 0.6
Derivative liabilities $ 0.8 0.0
Equity forwards | Derivative contracts designated as hedging instruments:    
Derivatives, Fair Value [Line Items]    
Derivative contracts, number of shares outstanding 0.4  
Derivative contracts, weighted-average forward rates (in dollars per share) $ 90.59  
Notional value $ 29.9  
Derivative assets 0.0 0.2
Derivative liabilities $ 0.3 0.0
Equity forwards | Derivative contracts not designated as hedging instruments:    
Derivatives, Fair Value [Line Items]    
Derivative contracts, number of shares outstanding 0.6  
Derivative contracts, weighted-average forward rates (in dollars per share) $ 76.39  
Notional value $ 47.7  
Derivative assets 0.0 0.4
Derivative liabilities 0.5 0.0
Commodity contracts    
Derivatives, Fair Value [Line Items]    
Notional value 10.0  
Derivative assets 0.1 0.5
Derivative liabilities $ 0.1 $ 0.0