SPECIAL CHARGES (RECOVERIES) - Schedule of Restructuring Reserve (Details) - Business Optimization Plan $ in Thousands	3 Months Ended
Sep. 30, 2025 USD ($)
Restructuring Reserve [Roll Forward]
Balance, beginning	$ 51,129
Accruals and adjustments	7,912
Cash payments	(35,896)
Foreign exchange and other non-cash adjustments	(544)
Balance, ending	22,601
Workforce reduction
Restructuring Reserve [Roll Forward]
Balance, beginning	48,283
Accruals and adjustments	4,893
Cash payments	(35,616)
Foreign exchange and other non-cash adjustments	736
Balance, ending	18,296
Facility charges
Restructuring Reserve [Roll Forward]
Balance, beginning	2,846
Accruals and adjustments	3,019
Cash payments	(280)
Foreign exchange and other non-cash adjustments	(1,280)
Balance, ending	$ 4,305

Payments (Recoveries) For Restructuring

No definition available.

Name:	otex_PaymentsRecoveriesForRestructuring
Namespace Prefix:	otex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Restructuring Reserve, Foreign Currency Translation Gain (Loss) and Settled without Cash

+ References

No definition available.

+ Details

Name:	otex_RestructuringReserveForeignCurrencyTranslationGainLossandSettledwithoutCash
Namespace Prefix:	otex_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4.b.2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 420
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482017/420-10-50-1

+ Details

Name:	us-gaap_RestructuringReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

+ References

+ Details

Name:	us-gaap_RestructuringReserveAccrualAdjustment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_RestructuringReserveRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RestructuringPlanAxis=otex_BusinessOptimizationPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=otex_WorkforceReductionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RestructuringCostAndReserveAxis=us-gaap_FacilityClosingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: