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ACCOUNTING POLICIES AND RECENT ACCOUNTING PRONOUNCEMENTS - Accounts Receivable and Allowance for Doubtful Accounts (Details)	12 Months Ended
	Jun. 30, 2020
Accounting Policies [Abstract]
Percentage for allowance maintained on bad-debts	100.00%

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- Definition

Percentage for Allowance Maintained on Bad-Debts

+ References

No definition available.

+ Details

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Namespace Prefix:	otex_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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