Accounting Policies and Recent Accounting Pronouncements - Allowance for Doubtful Accounts (Details) - customer	12 Months Ended
Jun. 30, 2017	Jun. 30, 2016
Accounting Policies [Abstract]
Percentage for allowance maintained on bad-debts	100.00%
Customers accounting for more than 10% of accounts receivable balance	0	0

Customer Accounted for More than Ten Percentage Accounts receivables

No definition available.

Name:	otex_CustomerAccountedforMorethanTenPercentageAccountsreceivables
Namespace Prefix:	otex_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration