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Document And Entity Information
 9 Months Ended
Mar. 31, 2015
Apr. 27, 2015
Document And Entity Information [Abstract]    
Entity Registrant Name OPEN TEXT CORP  
Entity Central Index Key 0001002638  
Current Fiscal Year End Date --06-30  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Mar. 31, 2015  
Document Fiscal Year Focus 2015  
Document Fiscal Period Focus Q3  
Trading Symbol otex  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   122,213,136dei_EntityCommonStockSharesOutstanding
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes