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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 27, 2018
May 28, 2017
Derivatives, Fair Value [Line Items]    
Derivative contracts, number of shares outstanding 123.5 125.4
Derivative assets $ 1.1 $ 0.0
Derivative liabilities 0.0 0.4
Equity forwards    
Derivatives, Fair Value [Line Items]    
Derivative assets 0.6 0.0
Derivative liabilities $ 0.0 0.4
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) $ 77.66  
Notional value $ 29.1  
Derivative assets 0.2 0.0
Derivative liabilities $ 0.0 0.1
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) $ 59.34  
Notional value $ 36.1  
Derivative assets 0.4 0.0
Derivative liabilities 0.0 0.3
Commodity contracts    
Derivatives, Fair Value [Line Items]    
Notional value 6.7  
Derivative assets 0.5 0.0
Derivative liabilities $ 0.0 $ 0.0