Basis of Presentation	12 Months Ended
Basis of Presentation	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The accompanying Consolidated Financial Statements include the accounts of Open Text Corporation and our subsidiaries, collectively referred to as "OpenText" or the "Company". We wholly own all of our subsidiaries with the exception of Open Text South Africa Proprietary Ltd. (OT South Africa), GXS, Inc. (GXS Korea) and EC1 Pte. Ltd. (GXS Singapore), which as of June 30, 2017, were 70%, 85% and 81% owned, respectively, by OpenText. All inter-company balances and transactions have been eliminated. Previously, our ownership in OT South Africa was 90%. During the fourth quarter of Fiscal 2017, we acquired all of the outstanding non-controlling interests in OT South Africa for $0.2 million in cash. Subsequently, we sold 30% of our ownership in OT South Africa for $0.6 million to an unrelated party. The purchase consideration consisted of a non-interest bearing loan to be repaid to us over 10 years. These Consolidated Financial Statements are expressed in U.S. dollars and are prepared in accordance with United States generally accepted accounting principles (U.S. GAAP). The information furnished reflects all adjustments necessary for a fair presentation of the results for the periods presented and includes the financial results of Recommind, Inc. (Recommind), with effect from July 20, 2016, certain customer communication management software and services assets and liabilities acquired from HP Inc. (CCM Business), with effect from July 31, 2016, and certain assets and liabilities of the enterprise content division of EMC Corporation, a Massachusetts corporation, and certain of its subsidiaries, collectively referred to as Dell-EMC (ECD Business), with effect from January 23, 2017 (see note 18 "Acquisitions"). Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates, judgments and assumptions that affect the amounts reported in the Consolidated Financial Statements. These estimates, judgments and assumptions are evaluated on an ongoing basis. We base our estimates on historical experience and on various other assumptions that we believe are reasonable at that time, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from those estimates. In particular, significant estimates, judgments and assumptions include those related to: (i) revenue recognition, (ii) allowance for doubtful accounts, (iii) testing of goodwill for impairment, (iv) the valuation of acquired intangible assets, (v) the valuation of long-lived assets, (vi) the recognition of contingencies, (vii) restructuring accruals, (viii) acquisition accruals and pre-acquisition contingencies, (ix) the realization of investment tax credits, (x) the valuation of stock options granted and obligations related to share-based payments, including the valuation of our long-term incentive plans, (xi) the valuation of pension assets and obligations, and (xii) accounting for income taxes. Share Split As a result of the two-for-one share split, effected January 24, 2017 by way of a share sub-division, all current and historical period per share data and number of Common Shares outstanding in these accompanying Consolidated Financial Statements and the Notes to the Consolidated Financial Statements are presented on a post share split basis. See note 12 "Share Capital, Option Plans and Share-based Payments" for additional information about the share split.