Basis Of Presentation	6 Months Ended
Dec. 31, 2014
Basis Of Presentation [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	BASIS OF PRESENTATION The accompanying unaudited condensed consolidated financial statements of PAREXEL International Corporation (“PAREXEL,” the “Company,” “we,” “our” or “us”) have been prepared in accordance with generally accepted accounting principles for interim financial information in the United States and the instructions of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (primarily consisting of normal recurring adjustments) considered necessary for a fair presentation of the Company’s financial position as of December 31, 2014, results of operations for the three and six months ended December 31, 2014 and 2013 have been included. Operating results for the three and six months ended December 31, 2014 are not necessarily indicative of the results that may be expected for other quarters or the entire fiscal year. For further information, refer to the audited consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K for the fiscal year ended June 30, 2014 (the “2014 10-K”) filed with the Securities and Exchange Commission on August 20, 2014. Recently Adopted Accounting Standards In March 2013, the Financial Accounting Standard Board (“FASB”) issued Accounting Standard Update (“ASU”) No. 2013-05, “Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity.” ASU 2013-05 addresses the accounting for the cumulative translation adjustment when a parent either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity. We adopted ASU 2013-05 beginning in our fiscal quarter ended September 30, 2014. The adoption of ASU 2013-05 did not impact our consolidated financial statements. Recently Issued Accounting Standards In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which stipulates that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this core principle, an entity should apply the following steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 will be effective prospectively for fiscal years and interim periods within those years beginning after December 15, 2016. Early adoption is not permitted. We are assessing the impact of adopting ASU 2014-09 on our consolidated financial statements. In June 2014, the FASB issued ASU No. 2014-12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period. ASU 2014-12 requires that a performance target that affects vesting and could be achieved after the requisite service period be treated as a performance condition. A reporting entity should apply existing guidance in Accounting Standards Codification (“ASC”) 718, Compensation—Stock Compensation, as it relates to such awards. ASU 2014-12 will be effective in the first quarter of our fiscal year ending June 30, 2017 with early adoption permitted using either of two methods: (i) prospective to all awards granted or modified after the effective date; or (ii) retrospective to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter, with the cumulative effect of applying ASU 2014-12 as an adjustment to the opening retained earnings balance as of the beginning of the earliest annual period presented in the financial statements. We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements.

BASIS OF PRESENTATION

The accompanying unaudited condensed consolidated financial statements of PAREXEL International Corporation (“PAREXEL,” the “Company,” “we,” “our” or “us”) have been prepared in accordance with generally accepted accounting principles for interim financial information in the United States and the instructions of Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (primarily consisting of normal recurring adjustments) considered necessary for a fair presentation of the Company’s financial position as of December 31, 2014, results of operations for the three and six months ended December 31, 2014 and 2013 have been included. Operating results for the three and six months ended December 31, 2014 are not necessarily indicative of the results that may be expected for other quarters or the entire fiscal year. For further information, refer to the audited consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K for the fiscal year ended June 30, 2014 (the “2014 10-K”) filed with the Securities and Exchange Commission on August 20, 2014.

Recently Adopted Accounting Standards

In March 2013, the Financial Accounting Standard Board (“FASB”) issued Accounting Standard Update (“ASU”) No. 2013-05, “Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity.” ASU 2013-05 addresses the accounting for the cumulative translation adjustment when a parent either sells a part or all of its investment in a foreign entity or no longer holds a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity. We adopted ASU 2013-05 beginning in our fiscal quarter ended September 30, 2014. The adoption of ASU 2013-05 did not impact our consolidated financial statements.

Recently Issued Accounting Standards

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which stipulates that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve this core principle, an entity should apply the following steps: (1) identify the contract(s) with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contract; and (5) recognize revenue when (or as) the entity satisfies a performance obligation. ASU 2014-09 will be effective prospectively for fiscal years and interim periods within those years beginning after December 15, 2016. Early adoption is not permitted. We are assessing the impact of adopting ASU 2014-09 on our consolidated financial statements.

In June 2014, the FASB issued ASU No. 2014-12, Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period. ASU 2014-12 requires that a performance target that affects vesting and could be achieved after the requisite service period be treated as a performance condition. A reporting entity should apply existing guidance in Accounting Standards Codification (“ASC”) 718, Compensation—Stock Compensation, as it relates to such awards. ASU 2014-12 will be effective in the first quarter of our fiscal year ending June 30, 2017 with early adoption permitted using either of two methods: (i) prospective to all awards granted or modified after the effective date; or (ii) retrospective to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter, with the cumulative effect of applying ASU 2014-12 as an adjustment to the opening retained earnings balance as of the beginning of the earliest annual period presented in the financial statements. We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements.