| 
           Related Parties (Details) (USD $) 
        In Millions, unless otherwise specified  | 
        12 Months Ended | ||
|---|---|---|---|
| 
           May 31, 2013 
         | 
        
           May 31, 2012 
         | 
        
           May 31, 2011 
         | 
      |
| 
           EMC Corporation [Member] 
         | 
        |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | $ 6.5 | $ 2.6 | $ 5.7 | 
| 
           Staples, Inc. [Member] 
         | 
        |||
| Related Party Transaction [Line Items] | |||
| Purchases from related parties | $ 1.6 | $ 1.8 | $ 1.8 | 
| X | ||||||||||
| 
             
- Definition 
          Amount of transactions with related party during the financial reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Details 
          
  |