SHARE CAPITAL, OPTION PLANS AND SHARE-BASED PAYMENTS - Summary of Information Regarding Stock Options Outstanding (Details) - $ / shares	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Options Outstanding
Number of options Outstanding as of June 30, 2021	8,113,574	7,429,537
Weighted Average Remaining Contractual Life (years)	4 years 10 months 17 days	4 years 9 months 10 days
Weighted Average Exercise Price (in dollars per share)	$ 40.16	$ 36.18
Options Exercisable
Number of options Exercisable as of June 30, 2021	2,567,483
Weighted Average Exercise Price (in dollars per share)	$ 34.83
$22.68 to $33.06
Range of Exercise Prices
Minimum (in dollars per share)	22.68
Maximum (in dollars per share)	$ 33.06
Options Outstanding
Number of options Outstanding as of June 30, 2021	1,102,966
Weighted Average Remaining Contractual Life (years)	2 years 4 months 17 days
Weighted Average Exercise Price (in dollars per share)	$ 30.61
Options Exercisable
Number of options Exercisable as of June 30, 2021	943,933
Weighted Average Exercise Price (in dollars per share)	$ 30.27
$33.07 to $34.60
Range of Exercise Prices
Minimum (in dollars per share)	33.07
Maximum (in dollars per share)	$ 34.60
Options Outstanding
Number of options Outstanding as of June 30, 2021	712,037
Weighted Average Remaining Contractual Life (years)	3 years 1 month 20 days
Weighted Average Exercise Price (in dollars per share)	$ 34.16
Options Exercisable
Number of options Exercisable as of June 30, 2021	507,976
Weighted Average Exercise Price (in dollars per share)	$ 34.09
$34.61 to $38.30
Range of Exercise Prices
Minimum (in dollars per share)	34.61
Maximum (in dollars per share)	$ 38.30
Options Outstanding
Number of options Outstanding as of June 30, 2021	874,882
Weighted Average Remaining Contractual Life (years)	4 years 10 months 24 days
Weighted Average Exercise Price (in dollars per share)	$ 36.72
Options Exercisable
Number of options Exercisable as of June 30, 2021	358,255
Weighted Average Exercise Price (in dollars per share)	$ 36.10
$38.31 to $39.02
Range of Exercise Prices
Minimum (in dollars per share)	38.31
Maximum (in dollars per share)	$ 39.02
Options Outstanding
Number of options Outstanding as of June 30, 2021	634,760
Weighted Average Remaining Contractual Life (years)	5 years 1 month 6 days
Weighted Average Exercise Price (in dollars per share)	$ 38.76
Options Exercisable
Number of options Exercisable as of June 30, 2021	144,703
Weighted Average Exercise Price (in dollars per share)	$ 38.76
$39.03 to $39.98
Range of Exercise Prices
Minimum (in dollars per share)	39.03
Maximum (in dollars per share)	$ 39.98
Options Outstanding
Number of options Outstanding as of June 30, 2021	704,352
Weighted Average Remaining Contractual Life (years)	4 years 2 months 15 days
Weighted Average Exercise Price (in dollars per share)	$ 39.34
Options Exercisable
Number of options Exercisable as of June 30, 2021	312,972
Weighted Average Exercise Price (in dollars per share)	$ 39.34
$39.99 to $43.22
Range of Exercise Prices
Minimum (in dollars per share)	39.99
Maximum (in dollars per share)	$ 43.22
Options Outstanding
Number of options Outstanding as of June 30, 2021	821,355
Weighted Average Remaining Contractual Life (years)	5 years 4 months 6 days
Weighted Average Exercise Price (in dollars per share)	$ 40.74
Options Exercisable
Number of options Exercisable as of June 30, 2021	176,519
Weighted Average Exercise Price (in dollars per share)	$ 40.46
$43.23 to $45.40
Range of Exercise Prices
Minimum (in dollars per share)	43.23
Maximum (in dollars per share)	$ 45.40
Options Outstanding
Number of options Outstanding as of June 30, 2021	538,625
Weighted Average Remaining Contractual Life (years)	5 years 7 months 6 days
Weighted Average Exercise Price (in dollars per share)	$ 44.99
Options Exercisable
Number of options Exercisable as of June 30, 2021	123,125
Weighted Average Exercise Price (in dollars per share)	$ 44.99
$45.41 to $46.88
Range of Exercise Prices
Minimum (in dollars per share)	45.41
Maximum (in dollars per share)	$ 46.88
Options Outstanding
Number of options Outstanding as of June 30, 2021	2,382,097
Weighted Average Remaining Contractual Life (years)	6 years 1 month 9 days
Weighted Average Exercise Price (in dollars per share)	$ 45.81
Options Exercisable
Number of options Exercisable as of June 30, 2021	0
Weighted Average Exercise Price (in dollars per share)	$ 0
$46.89 to $48.34
Range of Exercise Prices
Minimum (in dollars per share)	46.89
Maximum (in dollars per share)	$ 48.34
Options Outstanding
Number of options Outstanding as of June 30, 2021	200,000
Weighted Average Remaining Contractual Life (years)	6 years 10 months 9 days
Weighted Average Exercise Price (in dollars per share)	$ 47.94
Options Exercisable
Number of options Exercisable as of June 30, 2021	0
Weighted Average Exercise Price (in dollars per share)	$ 0
$48.35 to $48.74
Range of Exercise Prices
Minimum (in dollars per share)	48.35
Maximum (in dollars per share)	$ 48.74
Options Outstanding
Number of options Outstanding as of June 30, 2021	142,500
Weighted Average Remaining Contractual Life (years)	6 years 7 months 9 days
Weighted Average Exercise Price (in dollars per share)	$ 48.74
Options Exercisable
Number of options Exercisable as of June 30, 2021	0
Weighted Average Exercise Price (in dollars per share)	$ 0
$22.68 to $48.74
Range of Exercise Prices
Minimum (in dollars per share)	22.68
Maximum (in dollars per share)	$ 48.74
Options Outstanding
Number of options Outstanding as of June 30, 2021	8,113,574
Weighted Average Remaining Contractual Life (years)	4 years 10 months 17 days
Weighted Average Exercise Price (in dollars per share)	$ 40.16
Options Exercisable
Number of options Exercisable as of June 30, 2021	2,567,483
Weighted Average Exercise Price (in dollars per share)	$ 34.83

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable [Abstract]

No definition available.

Name:	otex_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsExercisableAbstract
Namespace Prefix:	otex_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Abstract]

+ References

No definition available.

+ Details

Name:	otex_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsOutstandingAbstract
Namespace Prefix:	otex_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Abstract]

+ References

No definition available.

+ Details

Name:	otex_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeAbstract
Namespace Prefix:	otex_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeSixMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeSevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeEightMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeTenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=otex_StockOptionsExercisePriceRangeElevenMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: