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Debt (Tables)
 6 Months Ended
Jul. 31, 2011
Debt  
Long-Term Debt Issuances

Issue Date

  

Maturity Date

   

Interest Rate

   

Principal Amount

April 18, 2011   April 15, 2014    1.625%    $1,000
April 18, 2011   April 15, 2016    2.800%      1,000
April 18, 2011   April 15, 2021    4.250%      1,000
April 18, 2011   April 15, 2041    5.625%   

  2,000

                Total Issuances        

$5,000