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Allowance for Doubtful Accounts
12 Months Ended
May 31, 2013
Allowance for Doubtful Accounts  
Allowance for Doubtful Accounts

18. Allowance for Doubtful Accounts

 
  May 31,  
 
  2013   2012   2011  

Balance, beginning of year

  $ 6.5   $ 5.7   $ 4.8  

Provision charged to operations

    6.8     2.4     1.3  

Deductions for accounts written off, net of recoveries

    (4.6 )   (1.6 )   (0.4 )
               

Balance, end of year

  $ 8.7   $ 6.5   $ 5.7