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Long Term Debt and Other Financing Arrangements (Tables)
12 Months Ended
May 31, 2011
Long Term Debt (Tables) Abstract  
Components of Long-term Debt (Net of Discounts)
  May 31,
  2011 2010
Senior unsecured debt     
 Interest rate of 7.25%, due in 2011$ - $ 250
 Interest rate of 9.65%, due in 2013  300   300
 Interest rate of 7.38%, due in 2014  250   250
 Interest rate of 8.00%, due in 2019  750   750
 Interest rate of 7.60%, due in 2098  239   239
    1,539   1,789
Capital lease obligations  146   141
    1,685   1,930
 Less current portion  18   262
  $ 1,667 $ 1,668