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COVER PAGE - USD ($)
$ in Billions
 12 Months Ended
Jun. 30, 2024
Jul. 26, 2024
Dec. 31, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Jun. 30, 2024    
Current Fiscal Year End Date --06-30    
Document Transition Report false    
Entity File Number 0-27544    
Entity Registrant Name OPEN TEXT CORP    
Entity Incorporation, State or Country Code Z4    
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, Country CA    
Entity Address, Postal Zip Code N2L 0A1    
City Area Code 519    
Local Phone Number 888-7111    
Title of 12(b) Security Common stock without par value    
Trading Symbol OTEX    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 11.2
Entity Common Stock, Shares Outstanding   268,189,944  
Documents Incorporated by Reference
None.
    
Entity Central Index Key 0001002638    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false