SPECIAL CHARGES (RECOVERIES) - Schedule of Restructuring Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2023	Jun. 30, 2022
Micro Focus Acquisition Restructuring Plan
Restructuring Reserve [Roll Forward]
Balance, beginning	$ 0
Accruals and adjustments	65,148
Cash payments	(32,294)
Foreign exchange and other non-cash adjustments	238
Balance, end	33,092	$ 0
Micro Focus Acquisition Restructuring Plan \| Workforce reduction
Restructuring Reserve [Roll Forward]
Balance, beginning	0
Accruals and adjustments	57,261
Cash payments	(31,738)
Foreign exchange and other non-cash adjustments	293
Balance, end	25,816	0
Micro Focus Acquisition Restructuring Plan \| Facility charges
Restructuring Reserve [Roll Forward]
Balance, beginning	0
Accruals and adjustments	7,887
Cash payments	(556)
Foreign exchange and other non-cash adjustments	(55)
Balance, end	7,276	0
Fiscal 2022 Restructuring Plan
Restructuring Reserve [Roll Forward]
Balance, beginning	6,399	0
Accruals and adjustments	5,116	7,828
Cash payments	(7,411)	(1,336)
Foreign exchange and other non-cash adjustments	(299)	(93)
Balance, end	3,805	6,399
Fiscal 2022 Restructuring Plan \| Workforce reduction
Restructuring Reserve [Roll Forward]
Balance, beginning	989	0
Accruals and adjustments	3,729	2,138
Cash payments	(4,212)	(1,117)
Foreign exchange and other non-cash adjustments	(9)	(32)
Balance, end	497	989
Fiscal 2022 Restructuring Plan \| Facility charges
Restructuring Reserve [Roll Forward]
Balance, beginning	5,410	0
Accruals and adjustments	1,387	5,690
Cash payments	(3,199)	(219)
Foreign exchange and other non-cash adjustments	(290)	(61)
Balance, end	$ 3,308	$ 5,410

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 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482017/420-10-50-1

Reference 2: 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

+ 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

Reference 1: 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

Reference 2: 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

+ 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_MicroFocusAcquisitionRestructuringPlanMember
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:

- Details

Name:	us-gaap_RestructuringPlanAxis=otex_Fiscal2022RestructuringPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: