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Share-Based Payments (Tables)
3 Months Ended
Aug. 28, 2011
Share-Based Payments [Abstract]  
Weighted average Black-Scholes assumptions for stock options granted
         
Expected volatility (%)
    22.89  
Dividend yield (%)
    3.97  
Risk-free interest rate (%)
    1.38  
Expected life of stock option (years)
    4.75