XML 17 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Cover Page - USD ($)
$ in Billions
 12 Months Ended
Jun. 30, 2019
Jul. 30, 2019
Dec. 31, 2018
Cover page.      
Document Transition Report false    
Entity Incorporation, State or Country Code Z4    
Document Annual Report true    
Document Type 10-K    
Document Period End Date Jun. 30, 2019    
Entity File Number 0-27544    
Entity Registrant Name OPEN TEXT CORP    
Entity Public Float     $ 8.6
Entity Central Index Key 0001002638    
Current Fiscal Year End Date --06-30    
Entity Filer Category Large Accelerated Filer    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Title of 12(b) Security Common stock without par value    
Trading Symbol OTEX    
Security Exchange Name NASDAQ    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   270,011,817  
Entity Emerging Growth Company false    
Entity Small Business false    
Entity Shell Company false    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Tax Identification Number 98-0154400    
Entity Address, Address Line One 275 Frank Tompa Drive,    
Entity Address, City or Town Waterloo,    
Entity Address, State or Province ON    
Entity Address, Postal Zip Code N2L 0A1    
Entity Address, Country CA    
City Area Code 519    
Local Phone Number 888-7111    
Documents Incorporated by Reference
None.