ACCOUNTS PAYABLE AND ACCRUED LIABILITIES - Additional Information (Details) - USD ($) $ in Millions	Dec. 31, 2025	Jun. 30, 2025
Accounts Payable and Accrued Liabilities [Abstract]
Present value	$ 29.4	$ 29.7
Undiscounted value	$ 31.5	$ 32.2

The present value of a liability for an asset retirement obligation associated with the disposal or retirement of a tangible long-lived asset that results from acquisition, construction or development, or the normal operations of a long-lived asset including obligations from operating leases.

No definition available.

Name:	otex_AssetRetirementObligationPresentValue
Namespace Prefix:	otex_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant