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Document and Entity Information (USD $)
12 Months Ended
Jun. 30, 2011
Aug. 08, 2011
Dec. 31, 2010
Document and Entity Information      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Jun. 30, 2011
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY    
Trading Symbol otex    
Entity Registrant Name OPEN TEXT CORP    
Entity Central Index Key 0001002638    
Current Fiscal Year End Date --06-30    
Entity Well-known Seasoned Issuer Yes    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   57,333,187  
Entity Public Float     $ 2,000,000,000