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Commitments (Tables)
 12 Months Ended
May 31, 2011
Commitments (Tables) Abstract  
Schedule of Purchase Commitments
   Aircraft and Facilities     
  Aircraft Related and Other(1)  Total   
            
2012 $ 1,480 $ 918 $ 2,398  
2013   1,086   105   1,191  
2014   781   43   824  
2015   569   30   599  
2016   584   11   595  
Thereafter  1,470   132   1,602  
            
(1) Primarily vehicles, facilities, advertising and promotions contracts.
            
Schedule of Aircraft Purchase Commitments
  B757 B777F Total 
        
2012 16  7  23 
2013 4  6  10 
2014 -  7  7 
2015 -  3  3 
2016 -  3  3 
Thereafter -  7  7 
Total 20  33  53