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Stock Plans (Schedule of information on restricted stock unit and cash-settled share-based units activity) (Details) (USD $)
12 Months Ended
May 26, 2013
May 27, 2012
May 29, 2011
Share Settled Units (Thousands) [Abstract]      
Granted 2,404,900 2,785,700 3,751,600
Weighted Average Grant-Date Fair Value [Abstract]      
Granted $ 38.41 $ 37.29 $ 36.16
Restricted Stock Unit Equity Classified [Member]
     
Share Settled Units (Thousands) [Abstract]      
Non-vested Beginning Balance 8,551,800    
Granted 2,330,400    
Vested (2,495,000)    
Forfeited or expired (345,000)    
Non-vested Ending Balance 8,042,200    
Weighted Average Grant-Date Fair Value [Abstract]      
Non-vested Beginning Balance $ 33.79    
Granted $ 38.42    
Vested $ 32.05    
Forfeited or expired $ 36.00    
Non-vested Ending Balance $ 35.89    
Restricted Stock Unit Liability Classified Share Settled [Member]
     
Share Settled Units (Thousands) [Abstract]      
Non-vested Beginning Balance 397,100    
Granted 74,500    
Vested (73,000)    
Forfeited or expired (10,400)    
Non-vested Ending Balance 388,200    
Weighted Average Grant-Date Fair Value [Abstract]      
Non-vested Beginning Balance $ 32.68    
Granted $ 38.15    
Vested $ 31.68    
Forfeited or expired $ 35.60    
Non-vested Ending Balance $ 32.60    
Restricted Stock Unit Liability Classified Cash Settled [Member]
     
Share Settled Units (Thousands) [Abstract]      
Non-vested Beginning Balance 3,991,500    
Granted 0    
Vested (1,638,200)    
Forfeited or expired (65,500)    
Non-vested Ending Balance 2,287,800    
Weighted Average Grant-Date Fair Value [Abstract]      
Non-vested Beginning Balance $ 31.58    
Granted $ 0    
Vested $ 31.64    
Forfeited or expired $ 32.31    
Non-vested Ending Balance $ 38.41