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Comprehensive Income (Tables)
6 Months Ended
Nov. 30, 2011
Comprehensive Income (Tables) [Abstract]  
Reconciliation of net income to comprehensive income
    Three Months Ended 
    2011 2010 
          
 Net income$ 497 $ 283 
 Other comprehensive income:      
  Foreign currency translation adjustments, net of      
   tax of $26 in 2011 and $11 in 2010  (110)   44 
  Amortization of unrealized pension actuarial gains/losses      
   and other, net of tax of $18 in 2011 and $15 in 2010  30   26 
          
          
 Comprehensive income$ 417 $ 353 
          
          
    Six Months Ended 
    2011 2010 
          
 Net income$ 961 $ 663 
 Other comprehensive income:      
  Foreign currency translation adjustments, net of      
   tax of $22 in 2011 and $17 in 2010  (91)   72 
  Amortization of unrealized pension actuarial gains/losses      
   and other, net of tax of $36 in 2011 and $31 in 2010  60   52 
          
          
 Comprehensive income$ 930 $ 787